Research on the role of Jaw crusher in limeston production line
According to the trial research of many kinds of crushers, Hongxing found out
that jaw crusher has the
following several significant features for limestone crushing:
a)The production capacity of jaw crusher is 600 ~ 800t / h, which is 25~40
times the capacity of the original limestone crusher. Hongxing jaw
crusher has solved the problem of high operating efficiency and no maintenance
time caused by low capacity for original limestone crusher.
b)Jaw crusher can crush large-sized limestone, and the maximum crushing size
is 1000 × 1200mm.
c)Fine final product size, only 2 ~ 15mm.
d)Good uniformity of two materials, and the mixing amount of desulfurization
limestone has greatly increased. The current mixing amount can reach 60%, which
can effectively reduce the cost of raw materials.
e)Low power consumption. 1 ton of limestone can save 1-2KWh/t power, and the
annual electricity savings will be 100,000RMB.
f)Effectively improved the labor intensity and work environment.
PE series jaw crusher of Henan Hongxing can be classified into primary and
fine crushing. PE and PEX series jaw crushers are widely used
for the primary and secondary crushing of various kinds of ores and rocks with
the compression strength no more than 320Mpa in mining, smelting, building,
highway, railway, water conservancy, chemical industry etc. With the feeding
size 125mm ~ 1020mm, jaw crusher is the preferred primary crushing
equipment.
As Chinas famous high-tech manufacturer of crusher, sand making machine, cement
grinding and wear-resistant materials, Hongxing has taken the lead in
manufacturing large crusher, stone crushing line, and large sand-stone production line. With
complete specifications, Hongxing jaw crusher can crush any materials that you
want to, and will be the best choice for you to crush hard and strong abrasive
rocks or recycling waste materials.
The advanced casting process of impact crusher shrinks needless defects
Traditionally, the impact
crusher is one of the crusher specially used in burning lime. Although the
impact crusher is with the characteristics of big crushing ratio, the wearing
parts is easily worn owning to the impact of the plate hammer, which causes the
increasing cost of wearing parts as well as the reduction of the crushing
amount. As with this phenomenon, Zhengzhou wear-resistant materials research
institute make efforts to upgrade the technology of the board hammer, impact
scaleboard and other components.
As we all know, the worn of the impact crusher plate hammer only appeares in
the side facing materials. When the rotor rotate at a normal speed, the feeding
materials will fall to the board surface of the plate hammer, it won't be worn
the plate hammer back and flanks, even the side facing material wear also
rarely. But when the rotor rotate at an abnormal speed, the plate hammer will be
worn easily.
The former board hammers are usually made from high manganese steel, which is
suitable for crushing materials with medium hardness, but when it crush such as
basalt, diabase, biotite, granite and other high hardness materials, the plate
hammer must have good corrosion resistance as well as high wear resistance.
Nowadays, the generally used plate hammer is mainly made by high chromium cast
iron, and high chromium content means relatively good toughness. However, high
chromium cast iron brittle and its high price promotes the continuously research
of new wear-resistant materials.
Reportedly, after many experiments as with the crushing characteristics of
impact crusher, reasonable application the most advanced nanotechnology, experts
of Zhengzhou Materials Institute has developed the new casting wear-resistant
materials whose sexual price is at present 1-2 times higher than the general
materials, which compared with similar imported products, semi solid extrusion
hypereutectic high chromium plate hammer has the advantages of high security,
high wear resistance, low in price and greatly shortened delivery cycle.
At present, the application of the semi solid extrusion hypereutectic high
chromium material is still in initial stage, and the wear plate hammer
manufacturers in China can be counted on one's fingers. However, once this kind
of wear-resistant materials become mature and widely applied, it will promote
the development of crushing machine especially the development of impact crusher
with strong wear-resistant material dependence
Pending mining machinery industry shows Bull Market
As a solid metal form, iron can be said that the worlds most commonly used
metal. Iron ore is the main raw material for industrial production. Because of
its great hardness, generally need to use the crusher to be broken.
Mining machinery mining resource development is an important tool for any
industrial raw materials are subject to mining machinery grinding process.
Exploitation of the mining process in the jaw crusher, impact crusher, hammer crusher, impact crusher
and cone crushers and other
equipment is essential in the machinery industry is also predominance, which a
range of equipment is more than the original ore into finished materials
industries must go through the necessary process equipment required. So the iron
ore market development, not only led to the development of machinery industry,
is leading the crushing equipment, crushers and other development.
Today, the price of iron ore has been less stable, the domestic demand for
iron ore in recent years is increasing. Shanghai, Tianjin and Beijing and other
cities in export-oriented steel consumption has reached the level of Japan and
other developed countries, but the real appeal is that the needs of Chinas
inland provinces and cities just beginning to rise. Currently, according to the
news that the Indian government may further increase iron ore export tax. If the
tax becomes a reality, the shortage of supply will directly affect the iron ore
spot prices, thereby pushing up the prices of iron ore. China will continue to
drive the next period of time, global demand for iron ore, iron ore market to
open up the west, so as to continuously push forward the development of mining
machinery industry.
With the national economy continues to develop, step by step process of
industrialization and increased urban construction, mining machinery demand for
technology has been growing, rising only by technology, can lead mining crushers
and other machinery industry constantly at the forefront of the state, more good
to sustainable development!
Dolomite is widespread and so is Dolomite equipment
Dolomite mining is important for industry. Dolomite is kind of carbonate
mineral which includes iron dolomite and manganese dolomite. Dolomite is the
main mineral component composed of dolomite and dolomite limestone. The dolomite
can be used in building materials, porcelain, glass and refractory after
dolomite crushing. In chemical industry, agriculture, environmental protection,
energy conservation, etc, the dolomite is in a great demand too and so the
dolomite crusher is widely applied. The dolomite is mainly used as the flux of
Basic Refractories and blast furnace. Here you can choose best dolomite crusher
machines for dolomite crushing.
Dolomite Application In Industry
Application in metallurgical industry: In the metallurgical industry,
dolomites are mainly used as flux, refractories, refining of metal magnesium and
magnesium compounds after dolomite mining.
The usage in building materials industry: Calcined dolomite can be processed
to make dolomitic limestone which is of good White, strong adhesion, coagulation
power, Fire-resistant, heat insulation. In these stages, dolomite crusher
equipments are needed. Therefore the dolomite is suitable for Interior and
exterior wall coating. The calcined dolomite can be used in Magnesium chloride
cement and concrete curing. After adding other brasque, they can be used for
flooring. Whats more, the dolomites can be directly used as building materials.
There are many dolomite crushing machines which can help broad dolomite
application in dolomite mining or quarrying.
Application in chemical industry: In chemical industry, the dolomite is
mainly used to produce chemicals, such as Magnesium sulfate, Light magnesium
carbonate, etc. Dolomite crusher can crush the stone to required fineness which
is suitable to production. Apart from all these above, the crushed dolomite
powder has been widely applied in agriculture, filler, etc. After dolomite
mining and crushing, we can use it to make more products which are often used in
various of industries.
The dolomite is mainly acclimated as the alteration of basal refractories and
bang furnace. Here you can accept beneath dolomite mining machines for dolomite
grinding.
Ball comminute for dolomite powder: Ball comminute is the aboriginal cutting
mill. It is acclimated in dolomite cutting plant.
Raymond comminute for dolomite bean grinding: Raymond comminute is broadly
acclimated in dolomite crumb assembly line. It can bullwork dolomite into crumb
with 200 mesh.
Dolomite mining is important for industry. Dolomite is affectionate of
carbonate mineral which includes adamant dolomite and manganese dolomite.
Dolomite is the capital mineral basal composed of dolomite and dolomite
limestone. The dolomite can be acclimated in architecture materials, porcelain,
bottle and adverse afterwards dolomite crushing. In actinic industry,
agriculture, ecology protection, activity conservation, etc, the dolomite is in
a abundant appeal too and so the dolomite altercation is broadly applied.
The acceptance in actinic industry: In actinic industry, the dolomite is
mainly acclimated to aftermath chemicals, such as Magnesium sulfate, Light
magnesium carbonate, etc. Dolomite altercation can drove the bean to appropriate
airiness which is acceptable to production. Apart from all these above, the
ashamed dolomite crumb has been broadly activated in agriculture, filler, etc.
Afterwards dolomite mining and crushing, we can use it to accomplish added
articles which are generally acclimated in assorted of industries.
Impact crusher is
based on the principle of work, that is, by naming the fragmentation of the
principle to material back smash, is a better than jaw crusher more fine
crusher equipment in the production line of stone, mainly used for homework, and
finely jaw crusher for cooperation and broken. The counterattack crusher in the
process to have the following five aspects of performance advantages.
A)The impact crusher handles a large quantity of wet material more effective.
Effectively prevent the material jam.
In the treatment of the material moisture too big when, the feed of the chute
impact breaker and
fight the board can be equipped with heating device, prevent the adhesive of the
material. The impact breaker need not equipped with sieve plate can effectively
avoid the block at the bottom of the phenomenon.
B)The impact breaker applicable materials hardness more extensive.
The impact breaker plate hammer the mechanical clamping firm structure is
scheduled for rotor, when with the rotor turns of great inertia. Relative to hammer crusher (hammer a
trailer state), the impact breaker rotor has more momentum, and adapt to the
more solid material, broken and the energy consumption is low.
C)Can be easily adjusted flexibly the grain-size, and the adjusting range is
extensive.
Counterattack type adjust hammer the grain-size, such as the rotor speed
adjustment, adjust counterattack board and grinding chamber clearance, etc.
Clearance adjustment can be through the mechanical or hydraulic on the
adjustment, the hydraulic governing system can easily through the on-site
operation button or control system to accomplish the clearance adjustment.
D)The vulnerability of small, high efficiency in metal wear.
Counterattack type broken stone machine wear plate hammer in only appear in
to meet the material side. As the rotor speed normal, feeding will fall to plate
hammer surface, the back of the plate hammer and side are not be wear. Even if
is to meet the material this side wear are few. And bottom grinding bar is easy
to change. Crusher metal utilization can be as high as 45% to 48%.
E)The impact breaker spare part replacement is simple, maintenance costs
less.
The impact breaker rotor just installed six plate hammer, with heavy industry
design of special tools can be convenient to replace the replacement of the
plate hammer, a set of plate hammer only one flight time. The bottom of great
change grinding chamber is only need dozens of minutes, and greatly reduce the
maintenance and maintenance of time and money. The five advantages of impact
crusher to let it become a counterattack crusher indispensable stone production line and the
sand production line equipment.
Stone crushers
are commonly used on construction sites and in stone quarries to crush large
stones into smaller pieces. Crushed rock has a variety of purposes but is often
used to make level surfaces, provide drainage under roads and buildings or to
create gravel roads. There are three types of crushers; sometimes multiple
crushers are used to achieve the desired size. Jaw crushers crush rock
by closing two walls against the large stones several times. Roller crushers are
often used as secondary crushers; rocks are fed between two rollers that crush
the rock. Cone crushers squeeze
rock through spinning grinders.
1)Inspect all the parts of the rock crusher before operation
and make any repairs or add lubrication where needed. Check for broken teeth,
bolts and belts and make sure there are no obstructions in the crushing
cavity.
2)Turn on the engine of the rock crusher and listen to make sure that it is
operating properly.
3)Start the crushing mechanism of the stone crusher to make sure all
components are operating smoothly. Shut down the machine and make repairs where
necessary.
4)Set the crusher up under a conveyor belt that can carry crushed rock to a
pile or dump truck.
5)Adjust the opening of the stone crusher to accommodate the size of the
stones you will be crushing. If you leave the opening too wide, your machine
will be performing excessive work, leading to unnecessary wear on your stone
crusher.
6)Feed large stones into the cavity of your stone crusher with a crane or
conveyor belt and allow the machine to do the work.
7)Feed crushed stones into a secondary stone crusher to achieve smaller
rocks, if desired. If you use a jaw crusher, you may need to
use a roller crusher to produce gravel-sized rocks.
8)Turn off the power to the machine and inspect its parts to make sure there
are no stones lodged in the stone cavity.
Stone crushers are
commonly used on construction sites and in stone quarries to crush large stones
into smaller pieces. Crushed rock has a variety of purposes but is often used to
make level surfaces, provide drainage under roads and buildings or to create
gravel roads. There are three types of crushers; sometimes multiple crushers are
used to achieve the desired size. Jaw crushers crush rock by closing
two walls against the large stones several times. Roller crushers are often used
as secondary crushers; rocks are fed between two rollers that crush the rock. Cone crushers squeeze
rock through spinning grinders. To ensure longer life of impact crusher, the
user should have a good repair and maintenance for it. And if impact crusher is
maintained properly, its service life will be prolonged 30%~50%. And how to
repair and maintain impact crusher?
1) Before being put into operation, impact crusher needs to inspected
carefully, for example, whether fasteners is loose or not, whether
wear-resistant parts should be replaced or not, whether lubrication and cooling
system is ok, etc.
2) Impact crusher should be started in the sequence as follows: dust removal
equipmentconveying equipmentcrusher and feeder. These machines should run
without load firstly, after making sure there is no abnormal condition, these
machines can run with load.
3) In the process of running, you should pay more attention to inspecting
lubricating system, and adding or replacing the lubricating oil regularly. The
temperature of rotor-bearing should be below 60 °, the maximum temperature
cannot exceed 70 °.
4) When stopping machines running, it should be according to the sequence of
production flow chart, which is in contrary to the starting sequence: Feeder has
to be stopped firstly, when materials in crusher is discharged completely, then
main motor and final product conveying equipment system can be stopped.
5) When the final product size is too big, users should check the wear
condition of hammer and impact plate, and the clearance between them.
How to make good inspection when crushers are running
Crusher equipment at work is running, the operator should seriously carry out
inspection work. Avoid the following points:
1). Prohibit individuals not wearing protective equipment: This is because
the working process in the crusher will produce noise and pollution, long-term
if I cause any harm. While wearing protective equipment can reduce our risk.
2) prohibits the instructions do not look at: equipment purchase to
familiarize yourself with equipment, to avoid unnecessary accidents.
3) Check whether there is something inside the machine: crusher run before
the first check whether there is a good ore crushing cavity or other things.
Because the crusher does not allow load to start, start the load will cause
power trip or damaged parts.
4). Prohibit the use of unqualified power.
5). When prohibition does not turn off power supply: the process of using the
device if a power outage, remember to be turned off, because suddenly, then
calls may be some harm. In addition, after the work is also necessary to develop
the habit of turning off the power.
6). Machines to do the maintenance work: Crusher is a kind of large-scale
equipment, long-term use will cause some wear and tear, so do the regular
maintenance of the machine.
Comply with the above point, to ensure the normal operation of the machine is
also able to protect its own security, to make equipment run more
efficiently.
Compared with Jaw crusher Compound crusher is also important for railway construction
And the role of the crusher compared to the single, composite crusher has
more powerful features. For those who work more complicated, many kinds of
materials for large-scale concentrator stones factory, it must be equipped with
a variety of different materials crusher to meet the crushing demand. Composite
crusher is developed on this basis made to fit a variety of materials, while
the advanced machines, complex task is made easier.
Composite crusher in widespread use in high-speed railway construction. Face
of Chinas high-speed railway construction peak arrival composite crusher demand
is particularly strong. However, high-speed railway construction, aggregate and
concrete sand and gravel aggregate demand is relatively high, and to meet the
needs of the industry composite crusher with capacity of this large-scale
enterprises at least a decade or more. Henan Hongxing machine of composite
crusher units have been widely used in various provinces in the construction of
highways and high-speed railway applications, is essential national
infrastructure equipment.
Relative to the ordinary crusher, the crusher complex there are several
advantages: reduction ratio, the maximum time you can not even hammer, the
impact of liner wear; no screening of the set, broken high water content, clay a
large quantity of materials is not easy to plug; unique rotor structure,
crushing the material, the rotor body almost no wear and tear; bearing
horizontal layout, long life, high temperature materials can be broken.
These features are combined with several characteristics of a single
integration of the breakers made of, is the excellent combination of
technology, is technology.
Jaw crusher is a famous
mining machinery machine widely used mining, road, railway, chemical industry,
etc. It was mainly make up by six parts. The first part is rack and it is a
walls rigid frame with the top and lower surface is open. Used for supporting
partiality axis and to bear the reaction of crushing materials. Generally
inblock cast by cast steel. Small machine can also used high quality iron
instead of cast steel. But the rack of large machine need cast subsection, the
process is more complex.
The second part is jaw plate and side guard plate, fixed jaws and dynamic jaw
were all made up by jaw bed and jaw plate. Jaw plate is working part, fixed in
the jaw bed by bolts and wedge iron .The jaw bed of fixed jaw is the front wall
of rack, the jaw bed of dynamic jaw was hanging in the axis. So the all need
enough intensity and stiffness to sustain the counterforce of crushing .
The thired part of jaw crusher is adjusting device , adjusting device divided
into wedge block type, plate type and the hydraulic, etc. Generally uses the
wedge block type.
The fourth part of jaw crusher is flywheel, the flywheel of jaw crusher is
used for storage trip energy of dynamic jaw, then used for industrial, make
mechanical work tend to equality.
The fifth part is transmission parts, eccentric shaft is the principal axis
of jaw crusher, it is can under great bend torsion, usually manufacturing by
high carbon steel.
The last main part of jaw crusher is lubrication device, eccentric shaft
bearing usually adopts concentrated circulation lubrication.
When jaw crusher crushing cavity things (such as crushing in an iron ball,
iron, etc.), for the protection of the equipment is mainly parts are not damaged
and use as crusher insurance after thrust board components. With cast iron plate
after general thrust moulds overall, in which a trough of some holes open or to
lower the cross-section intensity; Also can cast two, then use screws (or
rivets) of connecting thrust board, combined. When not broken objects into
crushing cavity, equipment overloaded and huge breakage force to thrust plate
lead to thrust board broken or combination thrust board screw, machine cut to
stop work, have insurance effect.
These knowledge may in equipment instructions say not so detailed, so the
user is in the purchase equipment, installation debugging when must learn more
with crusher experts, mastering jaw crusher insurance and discharging
adjustment, stable production can be better.
Big Time for Sand Making Production Machinery Industry
Sand is widely used in highway construction, concrete making, etc. As the
field of industry application gradually expanded, the gradual application of
natural sand work more and failed to keep pace with the various sectors of
modern world development needs. For the most part, machine-made sand is produced
to meet the great needs. Here you can learn more about definition of
machine-made sand and its wide applications.
Sand is also called manufactured sand, which was produced by crush the cobble
stone or other stone into sand by sand making machine. As
the basic materials of concrete, cement mortar of architectural sand, Successful
application of artificial sand is an indisputable fact that a large number of
engineering practices (including the Three Gorges Project) has demonstrated the
possibility and necessity of using sand.
Machine-made sand production line is an equipment which specializes in
producing building sand and stones. The granularity of sand is even, great in
compressive strength, which is more fit the requirement of high standard
building stand than nature sand, and sand produced by hammer crusher; it links with
feeding machine, jaw
crusher, PCL straight impact
crusher, heavy vibrating screen, high
efficient sand washing
machine, as well as belt
conveyor to form a production line. The production adopts high speed
rotation to throw out the sand material by linear velocity of 76m/s, clash on
wearing plate, forming the crushing principle of stone crush stone, and stone
crush iron, which ensures the whole technique flow discharges material smoothly,
reliable running with high efficiency and energy saving, that saves energy by
50% than traditional equipment.
There is scarcity of natural sand due to heavy demand in growing construction
activities which forces to find the suitable substitute. The cheapest and the
easiest way of getting substitute for natural sand is by crushing natural stone
to get artificial sand of desired size and grade which would be free from all
impurities.
Domestic market from the point of view, the crusher in this industry there
are numerous small and medium enterprises, these enterprises have done their
best in a competitive process from the brand, quality, price and various factors
to consider, to win more users. 'Quality is the life', this sentence description
of the important role of quality in the enterprise survival and development. The
12th Five-Year Plan for China's mining machine industry has brought great
opportunities, the construction of a number of high-speed rail to the crusher to
usher in a new room for growth. Some of the problems some time ago, high-speed
rail construction slowdown in the pace of railway construction, but the degree
of advance. To do so is to better ensure the project quality, safety
considerations, production and property in the majority of the people
responsible. A few years ago, faster high-speed rail construction. The
high-speed rail on the countrys economic development is a good thing, but the
railway construction investment project must be given careful consideration to
better adapt to economic and social development. More scientific considerations
on the speed and timing of high-speed rail construction.
How to ensure minimal equipment failure rate for cone crusher
Equipment failure rate is minimal and the maintenance of the equipment in
later period is extremely important. Mine must be allocated to the plate in the
middle , forbidding the mine goes into the crushing cavity directly. Because it
is easy to make crusher overload and the liner wear unevenly .
The condition of giving mine:
a. Mine evenly was distributed in the crushing cavity through the
distribution plate.
b. Feeding ore can't higher than the level of rolling acetabular wall.
The crusher to the maximum size of giving mine couldn't be allowed equal to
the mine mouth size ( the maximum size of giving mine = 85% to the mine mouth
size) ,or they will lead to :
a. Crushers yield reduced.
b. Damage to certain parts of the crusher.
2. Crushers are not allowed to start overloading , because the overload will
start the accident.
When the crusher will finish the work,at first we must stop to the mining
machine . When crushing the mine goes into the crushing cavity after discharge
,it can make crusher stop.Crusher should be always checking the pressure and
hydraulic locking system work station , once we identify problems and handling
in time .
3. Crushers' output
Crushers' output, and feeding methods , feeding degradation, platoon ore
blocks degrees size,mechanical properties, temperature and so on . Varies
greatly,the manufacturer of a given output is sketchy the quantity in the
specified conditions.
4. The replacement of rolling acetabular wall
Rolling acetabular wall with U shape screws embedded in the adjustment of the
ring, both between infusing zinc alloy and making closely. New installation or
the replacement of rolling acetabular wall, in the work six to eight hours we
should check for tightening situation ,and once again tighten the u-shaped
screw.
5. Gear mesh
The circular plate is worn by friction , affecting variations in the
clearance of the gear . In order to ensure the proper meshing gears must be
supplemented additional gasket in the bottom cover , the thickness of the gasket
should be equal to the size of wear of the circular plate.
6. Bowl-shape bearings and sealing device
When we install the bowl-shape bearings ,we should notice that we don't use
wire rope to avoid break block oil ring( use hardwood and other materials to
support in the wire rope between ).
7.When we assemble the cone
crusher , supporting spherical surface should be scraping to ensure crushing
cone and the bowl-shape spherical surface which should be keep 0.35-0.5mm
annular gap in excircle contact with the inner ring.
8. Cylindrical bushing and the frame body collaborates for the third
transition . In order to prevent rotation of bushing , injecting zinc alloy into
the tank upper bushing again . When new bushing should be replaced,we should
configure a frame body that the actual size of the preparation , as a long
period of work ,loading and unloading,the crusher will change the relationship
with cooperation. If the gap is too large,it will lead to rupture bushing.
9. Spring
The role of the spring : When hard detritus goes into the crusher ,the spring
can protect material from damaging the cone crusher , so the spring pressure and
crusher crushing force can adapt each other. In the normal working hours the
spring dosen't move , only iron blocks fall into in the crushing cavity which
makes the crusher overload,happening spring is compressed phenomenon.
10. To the cone crusher' part of exposed rotating , we should add
shields,which are owned by the user.
The Hospital for remedying the blockages of mobile crusher
The Hospital for remedying the blocked crushers
Mobile crushers
are used in a wide range of industries, including quarrying, ore processing and
recycling of demolition waste. This guidance is for all those with
responsibilities for the operation of mobile crushers,
including contract managers, supervisory staff and operators of these machines.
It covers the safe operation of the mobile crushing operation and includes
guidance on clearing blocked crushers.
This guidance cannot cover every risk and is not comprehensive. It does not
attempt to detail individual machinery safety concerns, but will only highlight
those key matters of concern.
Action when a crusher becomes blocked
Have a nominated person to supervise the activity and call for assistance as
necessary
Stop the feed at the earliest opportunity
Remove excess material by mechanical means where possible before the cause
of the blockage can be dealt within
In some cases, however, an amount of removal by hand will be involved and
when this occurs the crusher and associated plant must be stopped and isolated
Manual removal should only be carried out by suitably trained and competent
persons
Hazards encountered may be:
Poor or difficult access
Accidental start up of feeder, crusher or adjacent plant
Being struck by material from the feeder, chute or projected material
The movement of any material present inside the crusher
Slipping and falling
Manual handling of rocks and equipment
Unexpected movement of crusher components
Damaged electrical cable
Noise
Stored energy from electrical, hydraulic, compressed air, mechanical sources
and gravity
Unsafe placement of material removed from the crusher.
Clearing blockages
Bridged crushers
The preferred method of clearing a bridged crusher is by the use of a
hydraulic arm (typically a360 excavator fitted with a quick hitch bucket
attachment and either a static pick or a hydraulic hammer available).
Depending on the result of your risk assessment, clearing out a bridging
blockage with a hydraulic arm (with pick attachment) may be carried out with or
without the crusher still operating.
Use of cranes (including manually operated lifting tackle), Lifting
and Slinging
When hydraulic arms are not available and cranes slung with hooks have proved
ineffectual, other methods are necessary. When it becomes necessary for a person
to enter the crusher to position hooks or slings, the crusher and feeder must be
stopped, isolated and locked off (in accordance with manufacturers/suppliers
instructions) and safety harness worn.
Other available options
Where other options are to be considered they should be subject to a detailed
and thorough risk assessment. The crusher should be shut off and isolated before
considering the use of bars and hand hammers. Careful consideration should be
given to the risk of large pieces of feed material moving and causing trap or
crush injuries. Wedges should not be used due to the risk of them becoming a
projectile (This has caused fatalities in the past). Other options, which
require more specialist expertise and competence, include: gas or chemical
expansion, hydraulic ramp plates, permanently mounted hydraulic breaker (may
include the use of closed circuit television CCTV to assist the operator), use
of explosives.
Mobile crushers are versatile pieces of equipment with many uses. A properly
planned operation will be efficient, safe and productive. A poorly planned
operation will be unproductive, dangerous and inefficient.
Good working circumstance also affects the production efficiency
When you are thinking of moving around your desk or choosing a new place to
work, it may be a good idea to keep some of the following things in mind. Do a
quick check around you and with a couple adjustments you should find it easier
to work and you will be able to work longer and more efficiently.
Of course, in mining industry, to create a good working circumstance is not
only important for working safety, and also helpful to raise the production
efficiency. Magnetic separator
is used for removing iron powder from the recycling powder particle and magnetic
separator are widely used in wood, mining, ceramics, chemical, food and other
industries. Magnetic separator is suitable for the separation of materials with
a size below 3mm such as magnetite, pyrrhotite, roasted ore, ilmenite and so on.
It is also widely used for the iron removal in coal, non metallic minerals,
building materials and other materials, which is the most widely used and with
high universality machine in the industry. Now, let's give a conclusion on how
to build a more perfect working environment for magnetic separator.
The working environment of magnetic separator has always persecuted many
manufacturers. As we all know there will produce a large number of powdery
objects in the working of the magnetic separator, these objects floats in the
air because of the vibration of the magnetic separator. The floating powder
cause great harm on the surrounding environment and also have destruction on the
surrounding ecological environment as well as cause physical harm to workers in
the interior, which not only affect the living environment of people but also
reduce the production efficiency. In order to solve these problems, Henan Hongji
machinery specially gives some solutions and the details are as follows, hoping
which can help you:
At first, let's analysis how is the working environment of the magnetic
separator is destroyed:
1. The separator will produce great noise pollution in the process of its
operation;
2. In the separation process of magnetic separator, the crushing ore material
is sprayed in the air forming a powdery particles which do harm to the physical
health of workers;
3. And in the collection of fine ore and tailings, the operation will cause
the ore material flying as well as pollute the air and also result in great
waste of resources.
The solutions: in the design process of magnetic separator, design the
discharge device of magnetic separator to closed type so as not to cause
material flying in the air, and at the same time improving the engine and using
the new magnetic separator engine equipment can effectively reduce noise
pollution.
Henan dominates the field of China crusher markets
In recent years, with the rapid development of the economic in China, the
energy demand mushroom, the rapid development of large scale infrastructure,
highway, railway, and real estate projects led the processing and production of
sand, gravel and other building materials, which makes the need of mining
equipment especially crushers soar. Henan is one of the biggest mining machinery
manufacturing in China as well as one of the biggest is China's largest
production base of the crusher, which is the mainstay in the crushing equipment
production and has gathered numerous crusher manufacturers in mechanical
field.
The crushing machinery industry in Henan was arisen early in 1980s and
reached a prosperity period at the beginning of 1990s. At that time, the access
threshold of producing the mining machinery is not high, so crushers
manufacturers mushroomed as bamboo shoots after a spring rain. The prosperity of
crushing machinery industry didn't promote the benign development of this
industry, but led to more and more problems. Market gradually saturated and the
disordered competition of the crushing machinery industry brought a heavy blow
to the development of the whole industry.
Entering new century, the crushing machinery industry in Henan entered the
high-speed development period once again with the rapid economic developing, the
industry once again entered the high-speed development period. However, the
flourishing of the market also led the emerging of many nonprofessional
manufacturing enterprise, the production workshop of these enterprises are with
neither professional production equipment nor professional design team and
professional technical staff, so the product quality is not guaranteed.
At present although there are many business enterprises in crushing machinery
industry, among which manufacturers with real professional production
qualification can be counted on one's fingers. These large manufacturing
enterprises are all survival from the most intense mining machinery industry
competition in the last century, and now they all have the scale of production
capacity, diversification of products and keep the technology developing
synchronization with the international. And the most important is that they has
accumulated a large number of stable customer resources and achieved the trust
of customers in the past ten or twenty years' developing.
Let us to find the pathogeny and solutions for magnetic separator
The magnetic separator
motor overheating and sound not normal . Caused by the above reasons,
including:bearing bad lubrication or severe worn , fan leaves fall off or wear ;
Switch line contact undesirable , or disconnected to run single-phase ; voltage
is too low.
In the series of magnetic ferrite magnets and general use of the sr ndfeb
magnets. One ndfeb magnets chemical stability is poorer, in magnetic drum in the
humid air,Cement rotating
dryer easy appear surface oxidation gradually layered spalling phenomena.
good chemical stability, strontium ferrite magnets generally with the epoxy
resin bond into magnetic fixed set in magnetic of, there are also magnetic piece
of easy falls off phenomenon. So whether strontium ferrite magnets are necessary
or magnets for fixed.
Magnetic separator noise is not normal in normal operation , the cylinder was
jammed by obstacles and even the cylinder can not rotate , the bottom bin
vibrate . Caused by these reasons include : magnetic separation was jammed by
the bottom bin of object , or magnet fell off , causing the cylinder rattled
,serious causing cylinder of epidermal was lacerated . At this time we should
shut it down for maintenance and troubleshooting . Reducer overheating.Its main
causes : lack of oil ,or oiliness is bad; gear and worm wear serious,or meshing
is bad; bearing lubrication is bad ,or badly worn .
Magnetic separator of magnetic field intensity becomes weak. The major
reason,including : the temperature is too high ; sun exposure ; acid and alkali
corrosion. You can use gaussian measurement meter.
Magnetic separator is composed of foundation bed ,the magnetic system under,
the rotating cage, the magnetic system above, hollow shaft,concentrate hopper
other rotating equipment . Mounting base should to make hollow bearing seat as a
criterion to measure the elevation and level of degrees. The positioning of the
magnetic system under should make mounting base as the criterion . Turn cage
,next step is the upper and lower magnetic system must be accurate adjustment of
the gap ,which limits of deviation of 0 +1 mm.
The new development direction for the worn-out parts of ball mill
Cast iron in casting process is very common in the process of cast iron
products. For its quality problem is be worthy of attention, so we must learn
about the effects of several factors of cast iron pieces of ball mill.
The first is the process operation.Control and check the quality of the
casting in the manufacturing production.
The second is to possess a reasonable casting process.
The third is the quality of raw materials in the casting. If the quality of
the raw materials dose not match the standard, it will make the iron casting
generate defects, which effects of appearing quality and internal quality or
even make the cast iron scrap.
In recent years, wear-resistant casting industry has developed continuously
with the development of our national economy. And it now has become an
independent industry.
At present, due to the inevitable and objective wear problem in the
development of the industry exists in reality. Therefore, as long as the basic
raw material industry develops, the needs of casting wear-resistant parts will
be also continuous in supply. What's more, as the ceaseless progress of industry
and the requirements of energy saving and environmental protecting, the quantity
and variety of the wear-resistant parts in demand will continue to expand. The
wear-resistant castings industry will be more prosperous and have a stronger
vitality. Therefore, we call the wear-resistant casting industry an' immortal
industry'. Welding power source should be able to guarantee the long time
continuous and stable work. The operation machine can realize automatic welding
gun moving vertical and horizontal direction. The positioner can flip horizontal
rotation and vertical. Dust removal system is capable purify the welding fume
releasing by automatic welding gun.
Rolling bearing machine also like a coin with two different sides
Rolling bearing and sliding bearing are the most commonly used bearing
equipment. Rolling bearing equipment is a very wide range of industrial
application of a bearing product , which consists of the outer ring , inner ring
, rolling elements and cage components ,owning good starting performance and
load carrying capacity , applying to machine tools , automobiles, railways and
other industrial machinery ,civilian instruments. Rolling bearing equipment is
an important modern machinery and equipment supporting basic parts.
Comparing with sliding bearings , rolling bearing radial size is relatively
large , the noise , vibration and other aspects of performance level is
ordinary, but the load carrying capacity and starting performance is excellent,
which is easy maintenance and operation results reliable . The following is the
advantages of rolling bearing .
The rolling bearing equipment's fault phenomenon maily includes : bearing
installed parts temperature is too high,in the running bearings have noise, and
rolling bearings wear.
a. Rolling bearing equipment temperature is too high
In the organization operation, installation of bearing parts are allowed to
have a certain temperature, when the hand touched institutions shell, should not
feel hot to normal, otherwise it indicates that bearing temperature was too high
. Bearing temperature is too high for two reasons :oil quality does not meet the
requirements or deterioration , lubricant viscosity is too high ; body assembly
is too tight ( lack of space ); bearing assembly is too tight ; bearing ring is
rotate on the shaft or shell rotation ; load too large ; rolling bearing
equipment can keep the frame or rolling element crush.
b. Rolling bearing equipment noise
Rolling bearing equipment allows a slight noise in the work operation, if
noise is too large ,unusual noise or crash,which indicates that the bearing is
faulty .
Rolling bearing equipment noise is more complex reasons , one is the bearing
inner and outer rings which coordinate with surface wear . Because of this wear
and tear, damaging to the relationship which is bearings and housings , bearings
and shaft ; leading to the axis deviate from the correct location,and generate
abnormal sound in the high-speed movement . When bearings fatigue , causing
peeling off the metal surface ,which can lead to increase the bearing radial
clearance so that the generation of abnormal sound . In addition, the lack of
bearing lubrication ,the formation of dry friction,crushing and other reasons ,
which will have a bearing abnormal sound . Rolling bearings wear loose ,which
lead to frame wear loose,producing abnormal sound .
c. Rolling bearing equipment wear
Rolling bearing equipment wear is common problems in the proces of using
equipment ,which is mainly caused by the characteristics of the metal shaft :
Although metal has high hardness,the yield is poor (can not recover after
deformation ), poor impact resistance , fatigue resistance is poor, which can
easily lead to adhesive wear , abrasive wear , fatigue wear, fretting wear,etc .
Most of the rolling bearing equipment wear is not easy to detect ,and only
appear : the machine is too high temperature , beating amplitude is too big,
abnormal sound ,etc.,which will cause notice . When they are found above
problems, most of the rolling bearing equipment are worn , resulting in machine
downtime .
Advantages of rolling bearing
a. Rolling bearing structure and working principle of the movement can ensure
that its coefficient of friction is low, having better mechanical efficiency .
In the process of mechanical equipment operation , it can maintain low power
consumption , and have a good starting performance .
b. Rolling bearing equipment owns a good accuracy and rotate speed ,at the
same time it can meet the operation requirements of a variety of mechanical
equipment . In the device operation rolling bearing suffers the low friction
,low wear, so it has a longer service life . In the part of some products about
rolling bearing , which can achieve self-aligning feature and more widely to
industrial needs.
c. Rolling bearing structure is compact , small size , light weight, easy
installation and removal . Rolling bearing various components are achieve the
standardized size , which is not only conducive to the production of rolling
bearings but also conducive to the exchange each other , which make it easier to
repair and maintenance.
d. Rolling bearing is most use the steel as the main material, adding
standardized , serialized component design ,which is more conducive to
large-scale industrial manufacturing, quality assurance and stability .
Pendulum feeder is a kind of feeding machine that is able to deliver blocky
and granular materials from storage silo to receiving device evenly, regularly
and continuously in the production process.Pendulum feeder has the
characteristics of simple structure, reliable operation, easy adjustment and
installation, small size and the closed type of shell to prevent dust
pollution.
Pendulum feeder is suitable for chemical industry, mining, metallurgy,
construction, mineral processing, coal and other industries. It is not suitable
for delivering the dry power or materials of big size, otherwise, it may appear
the fly-ash pollution or the discharging blocking.
Adjust eccentric gear pin on the eccentricity of the eccentric ,which can
change the length of the itinerary of the swing bottom,adjusting the volume of
feeding with a wide range, adjust the height of the discharge port gate ,change
the size of discharge hole, which be able to Feeding precise adjustment.
The pendulum feeder is not suitable for delivering the dry powder or big
grain material, it may result in the dust pollution and the jam of the
discharging holes. The chute feeder can be installed on the ground or onto
discharge port of ore bin. The chute bottom plates do the reciprocating
movement, the movement frequency is 20-60 times/min and the stroke is 20-200mm.
Stroke can be adjusted by the eccentric wheel; the eccentric throw is half of
the stroke. According to experience of some mine sites, the eccentric throw
should no less than 30mm for cohesive ore. The chute width is 2-2.5 times of
maximum feeding granularity. The biggest chute feeder can supply ore with
granularity less than 500mm. the most common specification is 980*1240 chute
feeder, with feeding granularity between 350-0mm, which is the best partner of
400*600 jaw crusher.
All kinds of rules for operating and protecting a cement mill
Cement mill maintenance is
an extremely important regular work , it should be match closely with the
machine operation and maintenance , there should be full-time personnel on duty
checks.
Cement mill maintenance
1. Bearing . Crusher bearings shoulder all the load bearing of machine ,
great relationship between good lubrication and the bearing life, which directly
affects the life of the machine and the operation rate , and thus required to
fill the oil must be clean , seal must be good , the cement mill the main oiling
Office: rotating bearings , roller bearings , all the gear , activities bearing
, sliding plane.
2 . The newly installed wheel band is easy to loosening ,we must always be
checked.
3 . Note that various parts of the cement mill is working properly .
4 . Pay attention to check the wear easily parts of degree of wear , and at
any time pay attention to replacement of worn parts .
5 , Chassis plane of putting the activity device ,removing dust and other
objects in order to avoid the machine when the material can not crushed ,and the
bottom shelf can not move up and down in the activities of the bearing, so as to
cause serious accidents.
6 . The bearing temperature rises ,we should be immediately stopped and
checked cause of trouble to eliminate them.
7 . If sound machine produces impact sound,the turning gear operation should
be immediately stopped ,checked , and eliminated .
Installation and commissioning
1. The equipment should be installed in the level of concrete
foundation,using stone bolt to fix.
2 . Installation should pay attention to the main body and level of the
vertical.
3 . After installing, checking for various parts of loose bolts and the host
doors is whether tighten, if have, tighten.
4 . According to the power of the equipment configurations power and control
switch.
5 . Check finished, empty load test, test normal can carry on production.
