How to interchange the vulnerable part of large jaw crusher
The bearing of general large jaw
crusher mainly uses the open sliding bearing. The bearing liner is mostly
made of Babbitt alloy, the scraping technical of this kind of bearing has a
higher requirements. If the scraping is not good or gap adjusted improperly,
there can cause burning watt accident.
In process of replacing the bearing of large jaw crusher, we should pay
attention to the following points:
A. What should we do when remove the old watt of jaw crusher.
(1) Measure the thickness of the old bush joint surface gasket.
(2) Measure the levelness of the spindle.
(3) Examine whether the spindle is smooth or not, and whether it with the
defects of rust, bumps and so on or not. If the situation is exist, you should
to eliminate it.
(4) Measure the of the bottom clearance, backlash and end clearance of the
bearing bush.
B. Testing of the contact of the watt-back with the bearing of the jaw
crusher.
In order to prevent happening of the reverse sliding and rotating between the
bearing bush and the bearing pedestal when the equipment operation, it generally
adopts the pin, sleeve positioning mode.
C. The techniques requiring of the scraping the bearing bush.
Spindle scraping should meet the required standards of technical.
D. Scraping and grinding the spindle bush.
The scraping is generally divided into rough scraping, fine scraping and
refined scraping three processes.
E. The measurement and the adjusting method of the bearing clearance.
Reasonable adjust bearing clearance is an important issue, it must meet
specified standards
The general adjusting methods include: top clearance adjusting and measuring
methods, side gap adjusting and measuring methods, the axial clearance measuring
method.
F. The assembly and test.
When assemble the jaw crusher, clean the bearing bush, shaft, oil collector
and lubricating oil pipeline at first. Then assemble the main bearing,
connecting rod and other components. When testing, actuate the pump, and ensure
the amount of fuel supply slightly bigger than that of normal operation. As in
the process of testing does not appear the phenomenon that the temperature is
elevated and the current significantly increased, that proves the success of the
overhaul, then the equipment can be used normally.
In the course of operating jaw
crusher, sometimes the jaw crusher parking condition can be met suddenly. At
this time, if the operator can not find the reason of jaw crusher parking and
repair it immediately, the greater damage will be caused and all of stone
product must be forced stop operation, so the abnormal jaw crusher parking will
bring great loss for enterprise. Well, why the jaw crusher parking and how to
deal with this situation are very important.
(1). In the process of jaw crusher operation, some workers will keep adding
to the ore material to feed the inlet. As a result, the feeding material will be
more than the carrying capacity of the machine, it will cause a blockage of the
inlet. The jaw crusher parking will happen in this situation, the operators must
clean up the crushing cavity before restarting, and evenly feed the material to
avoid jaw crusher parking.
(2). Jaw Crusher is transmitted power by the drive belt, so if improper belt
tension will cause jaw crusher parking. So the belt should be checked before you
start the machine each time to see if the under belt is appropriate.
(3). Timely check up all the bolts of jaw crusher machine, the loosen bolts
also can cause jaw crusher parking in the course of operation.
Here, we also introduct some preparation work before using jaw crusher.
(1) double-check whether good lubrication of bearings, thrust plate
connections have enough grease.
(2) carefully check all fasteners are tightened.
(3) Carefully check the belt is good. If there is breakage, should be
replaced when the belt or pulley on the oil, the oil rag and wipe
applications.
(4) Check the protection device is good, that there is insecurity, should be
immediately removed.
(5) Check whether the ore crushing cavity or debris, or debris if the ore,
then must be clean to ensure crusher cavity start.
(6) Check whether the return from the top bolts, gaskets group is pressed,
T-bolts are tightened.
Important links of vibrating screen - Erection and Test
The vibrating
screen installation and debugging is important for the vibrating screener
users. If can influence the working life of vibratory screen and the quality of
final products. So the installation and debugging played an important role in
course of vibrating screen operation. So today we will talk about the vibrating
screen installation and debugging in order to make the user know more about the
vibrating screener working.
1) Pre-installation preparation
The new equipment, vibrating screen prior to installation, should be
carefully scrutinized. As the manufacture of finished goods inventory piling up
a longer time, such as rusted bearings, seals, aging or damaged during handling
and so on, faced with these problems need to be replaced new parts. Also, as
exciter, and the factory for rust-proof, injection of anti-rust oil, formally
put into operation before the replacement into lubricating oil.
Instructions should be read carefully before installation, make full
preparations.
2) The installation
(1) installation of supporting or hanging device. Installation, to foundation
leveling, and then supporting or hanging device in accordance with parts
drawings and installation diagram sieves, in order to install the components.
Spring-loaded before the end-tag should be the actual stiffness values
matching.
(2) sieve box connected to the supporting or hanging device. Bottles and
later, should be required to adjust the angle. For the hanging of the sieve, it
should also adjust the screen angle and screen box spindle box level. The
general level of first-degree horizontal adjustment to eliminate the screen box
deflection. Levels after correction, and then adjust the vertical inclination of
sieve box. Vibration isolation spring force should be uniform, which could force
the situation by measuring the amount of spring compression to judge. General,
two sets of feed-side of the compression spring to be the same two sets of
springs discharging side should also be the case. Nesting side and feed side may
be differences in the amount of spring compression.
(3) installation of electric motors and the triangle tape. Installation,
leveling should be based on the motor, motor level of need for correction, two
tape round the corresponding grooves of the center line should coincide,
triangular tension dictate the appropriate tape.
(4) required to install and fixed-screen surface.
(5) Check the connection sieve components (such as the sieve plate, exciter,
etc.) a fixed situation, screen should be uniform tension, in order to prevent
the generation of local vibration. Check the transmission part of the
lubrication conditions, the motor and control box wiring is correct, and the
rotation transmission part of the hand to see whether it is normal
operation.
(6) Check the entry sieve materials, discharge chute and the funnel at work
the next screen whether a crash.
3) Commissioning
Screening machine installed, commissioning should be empty, the initial check
installation quality, and make the necessary adjustments.
(1) shall not be less than the sieve empty commissioning time 8h. In this
time, the observation of sieve quickly whether to initiate a smooth, vibration
and stability of operation, no special noise amplitude by the amplitude to
observe its compliance with licensing requirements.
(2) The sieve operation, the vibrating screen box should not result in yaw.
In case of yaw, which may be due both sides of the spring height difference is
too large, hanging rope pull uneven rotation axis is not horizontal or
triangular tape too tight, should be adjusted accordingly.
(3) driving 4h, the bearing temperature is rising, and then remained stable.
The maximum temperature does not exceed 75, temperature should not exceed
40.
(4) If abnormal noise or driving after a sharp increase in bearing
temperature should be immediately shut down, check whether the rotation axis is
a flexible and well lubricated and so on, until after the start
troubleshooting.
(5) 2-4h after driving down to check whether there are loose connection
parts, if there are loose, tighten until after the drive.
(6) 8h after the test if no failure, only the installation of project
acceptance.
Introduction and functions of ball mill sound insulation
The ball mill
noise control is to control the noise output of the ball mill in the process of
crushing materials by the engineering measures and is also to control the spread
and receive of the noise,which is in order to reach the required acoustical
environment.
Strong vibration and noise will be produced when the ball mill crushes
materials and the noise can be up to about 100 to 115 dB (A),which does great
harm to the operation workers and the surrounding environment.
If you want to control this noise of ball mill, the selection and application
of ball mill sound insulation is important.
The ball mill sound insulation enclosure though no typical heat source, but
cans in the collision of Jane long-term friction also can produce certain
quantity of heat, also need to ventilation cooling. So the top cover open a
vents and matches the muffler. The lower end plate and cover between shaft have
crack, lie between the subglottic also often open, don't have to put wind path.
This kind of equipment is to heat, the natural ventilation cooling way is
enough. The cover of the structure of ball mill for assembly type, the first
ball mill around erection channel steel skeleton, and then it into pieces of the
cover wall plate assembly in successive skeletons. The upper portion of the
cover plate for tile form, all assembly method for bolt coupling fixed, so in
the equipment can be easily removed when the overhaul the sound insulation
cover.
For convenience of homework personnel, in the sound insulation cover body is
equipped with 8 group published two groups and the sound insulation window. The
group of five for personnel to enter the laryngeal mask for ball mill in related
to the operation with, the upper two equipment maintenance special door and a
note oil lubrication with little door. Except through the sound insulation
window lighting outside, enclosure also equipped with lighting facilities. Since
it is the local sound insulation cover, there is part of the equipment in the
hood, there is a cover body and the original equipment, the combination of
between. Cover board and equipment should be sealed tight between fixed
position. The problem is turning parts of the body and cover with more
difficult, the rotation axis to cross the ball mill sound insulation cover the
board, shall keep a circle gap here. Aperture neither too big. To avoid missing
voice sound insulation effect influence; But neither is too small, so as not to
cover plate and contact friction between the axis.
Sound insulation cover wall the composition of the board from inner to outer
is as follows: 3 RRN thick plate, 6 nm thick drain clear stone cotton lint
damping layer, 10 (~ en thick rock wool sound-absorbing board, spun glass cloth
and 1 mm thick, perforation rate 30% of the principal part of the perforation
panel. Cover plate thickness of the total for 11 firm. In the ends of the cover
because of the self-contained tank tube end of the gap between less than 100
ram, cover board and not allowed and rotation tank have a contact, and therefore
the place between the cover thickness for five (krma. Close to the shaft of the
site because operation requirements often remove cover board, so this part of
the cover plate is 4 ding m thick panels, with handles, may at any time off.
Provide brand products within: the ball mill, the rotary kiln, mineral
processing equipment, the grate ball mill and super fine ball mill.
Noise control of ball mill is the most direct, the most effective, the most
economic measure to reduce the sound source sound:' from the sound source
control noise'. So reducing noise source noise is the development trend of the
research on noise control of ball mill.
We can supply professional and complete service of Rotary kiln
The rotary kiln is a
rotary calcining kiln (commonly known as rotary kiln), belonging to the class of
building materials equipment. I produced the rotary kiln system is equipped with
technological innovation in the system using the most advanced hydraulic block
device using a high measurement accuracy of the metering piston pump,
high-precision speed control valve, contact graphite block sealing devices and
other domestic advanced technology.
Henan Hongxing made of excellent quality within the rotary kiln, divided into
several kinds of preheating decomposekiln, please welcome the experts to the
decomposition ofrotary kiln and explain, the characteristics of the evaluation
of decomposing furnace points:
(1) the gas flow, gas into in two different ways: the kiln gas into the way,
air into the way.
(2) material feeding the position of the point: jet fuel, feeding
entrance.
(3) rotary kiln temperature decomposition.
(4) rotary kiln stove burning conditions of fuel.
(5) of the rotary kiln powder and the residence time of gas.
The cylinder of kiln is made by high quality carbon steel plate , cylinder
and rotary department is supported by supporting device through tire. At the
middle part of the cylinder Fixed a large gear , the rotation of cylinder is
through speed regulating motor--reducer --pinion -- large gear. Materials is
feeding through the preheater chute to the rotary kiln, because of cylinder tilt
and slow rotation, material along the circumference side scrolling, meanwhile
moved to kiln head along the axial, Materials has been preheated, decomposed,
sintering, then become to calcined dolomite ,and discharging into the cooler
from the kiln head. The gas or coal powder as fuel is burning through the
burner, the heat will be transfered to material by the flame radiation, the heat
convection, kiln brick conduction , etc, then material calcined into finished
products.
Henan Hongxing Mining Machinery Co., Ltd. manufactures various equipments for
whole set of stone production
line, and provide complete technical support for customers. The whole
production line consists of stone crushing line, powder making line, sand making
line and ore beneficiation
line. We design different production lines ranging 50 t/h to 500 t/h by
combining different models of equipments also matching cone crusher, deduster,
etc.It is widely used for crushing hard limestone, granite, basalt, gravel,
metallurgic slag, etc or artificial sand making for hydroelectric power,
building material, high way, city construction, etc. Different models of
equipments are combined to meet different customers' demands according to
different craft requirements.
The coal vibrating screen
manufactured by Henan Hongxing Mining Machinery has accessed to countrywide
patents, and also the coal screen as critical coal preparing gear act being an
critical function within the processing circulation of coal screening plant. The
perfect coal screening equipment is extensively utilised in coal market
large-scale, mechanization, continuous grading operation.
Our coal vibrating screen has several benefits: mild excess weight, low
noise, small energy consumption, higher efficiency, lengthy provider life, basic
construction, handy maintenance attribute, utilised the high wear-resisting and
high hole and so on.
The coal vibrating screen is the main screening tool for coal dressing. The
normal screening work is realized by vibration, this is determined by the
characteristics of silo wall vibrators. But vibration is the root cause of
noise, and the noise with high sound level and sound source has variety and
complexity. How to reduce the coal vibrating screen noise is important in the
coal dressing process. There are some measures in the following for reducing the
coal vibrating screen noise.
1. Fasten all the parts of coal vibrating screen, especially the screen plate
which need to be replaced regularly, to avoid the necessary vibration caused by
individual components of coal vibration screen.
2. The punching plate should be replaced by polyurethane sieve or rubber
sieve which has the features of modulus of elasticity is small and low impact
noise. It can be equipped with anti-blocking device.
3. Add rubber sheet in the sieve box side,feeding and discharge port, which
can effectively suppress high-frequency vibrations and reduce radiated
noise.
4. Replaced steel spring with a rubber spring, to reduce the impact of coal
vibrating screen.
5. Add the soft acoustic shield out of the excister. Between the inner and
outer coat of the bearing to be damped processing, rolling of anti-blocking
device bearings can be made into a hollow roller or adding damping material in
the hollow rolling inside, this can reduce the bearing vibration and reduce
bearing noise.
The main purpose of beneficiation equipments is long-term use, it is
unnecessary for people to buy the most expensive mineral processing equipments,
but be sure to choose the right. People should according to the beneficiation
test process, combine with the process capacity and the field conditions to
choose the processing plant design and choose the right mineral processing
equipment. In the purchase of mining equipment, in the case of the price
difference is not large, be sure to choose the beneficiation equipment with good
quality, to know the production machine to stop one more day, it may bring loss
of tens of thousands or even millions.
In different place, because the ore grade, mineral structure, mineral form,
mineral occurrence, the size and other properties are different, so the ore beneficiation process and
technical conditions are different, this determined that the applied mineral
processing technology is differ from others. People must test their own ore
quality and then choose the proper beneficiation equipments. And then determine
the use value of mineral. People who want to invest in the mine, no matter how
high-grade of the mine, the first thing is find out the geological reserves and
better with geological detailed investigation report. To know the ore components
is the first step to choose what kind of beneficiation equipments is suitable.
The beneficiation equipments incluedes ball mill, shaking table and so on.
Henan Hongxing has a share holding company engages in providing services for
mining and construction company as well as providing professional advice for
building a factory.
All of them have implementation experiences in mining and construction
project management. During the recent years, we have already undertaken assembly
lines of different products for tens of big-scale multinational company and
small-and-mid sized companies in China. And our staff receives business
management courses in University at a regular time to obtain advanced management
idea.
Stone crusher also named rock crusher includes
stationary crusher, portable stone crusher or mobile stone crusher, mini stone
crusher, large heavy duty stone crusher, used stone crusher, etc. According to
stone crusher application, its usually used to take as primary crushing machine
or secondary crusher equipments in stone crushing plants, grinding
mill plants, limestone crusher
plants, rock quarry plants etc.
Stone crusher is used to crush these stones into small size or change the
form such as limestone, quartz, marble, granite and recycle building waste
materials such as debris, asphaltic cement concrete. Usually in stone crusher
plant, we crush stones into small particles with diameter of 10mm, 12mm, 19mm,
25mm, 50mm, 100mm. According to the stone crusher usage, jaw stone crusher is
used as primary crusher machine, when big stones are crushed smaller after jaw crusher, they are
transferred to impact stone
crusher or cone stone crusher for secondary crushing, then go through the
stone shapping machine for getting cubic size. Using screening machine to screen
out the suitable building aggregates, while the unsuitable stones return to the
stone crusher machine for re-crushing.
The birth of a crusher, whose production process, is a little long. After its
rough machining, modulation, fine machining, etc, an important step is doing
beauty for crusher. What the consumer need is not only its high-tech feature,
but its beautiful appearance. Henan Hongxing makes perfection more perfect in
every step. And now we will analyze the appearance of crusher.
For cabinet of crusher, after its stress relieving, then it will be abrasive
blasting. Through this step, the surface will be more smoothly. Even though it
seems not essential, a good crusher manufacture will try its best to make the
appearance more beautiful, meanwhile, the production cost will be higher.
However, Henan Hongxing can make his consumer feel good vale. The abrasive
blasting process is not just for crushers good-looking, but gaining in strength
of paint.
Nice sand making machine can create fabulous benefits
When the customers are going to buy the sand making machine,
they will first to be asked that what kind of material. This is because the
different hardness of material need different equipment, there will also have
different production capacity in the future. The sand making machine which
researched and developed by Henan Hongxing is used for highway, high speed
railway, municipal, and other public infrastructure, and it is the first choice
of artificial system sand and plastic field.
Sand making machine main features and benefits:
Simple structure and low operating cost; high efficiency and low consumption;
has the function of fine crush and crude grinding; slightly influenced by the
moisture content of material, and the max moisture content is 8%; more suitable
for crushing mid-hardness and high-hardness materials; cubic shape of final
products, high density of piling up and low iron pollution; more wearable and
easy maintenance; low working noise and light dust pollution.
The pertinence advantage of sand making machine, take the cobble for example,
some users directly choose crusher for the crushing of cobble to pave roads, but
leaked the most important sand making machine, actually this is not correct.
Based on too much users don't know much about the sand making machine while deal
with too hard stone so they can't choose the suitable equipment, insiders of
industry recommend, for the material such as cobble with higher hardness, users
can choose the sand making machine. This equipment has unique advantage compare
with the traditional equipment on the crushing of cobble; output capacity is
35%-50% higher than the traditional crushing equipment with same scale! And as
renewal of the sand making equipment, the application scope of sand making
machine becomes more widely, not only the concrete aggregate of civil
engineering and the stable layer material of highway construction; they all need
the strong support of the sand making machine.
The sand making machine can come to the fore in many mining equipment is not
by chance, this is through a long process and summing up experience and crushing
technology, condensed the essence of this industry. So it can say that the sand
making machine is the best choice of the benefit advantages under the mode of
new economic development.
In recent years, though the sand making machine has
experienced a fast development, questions still remains to be solved. For
example, how to decrease the noise of sand making machine? In order to solve
this problem, shunkys experts have been focusing on it for many years and
summarized the following solutions:
1. Do the self production to the workers near the sand making machine, they
can wear earplugs, covers and other noise-prevention tools. At the same time, do
the rotation work, thus it can shorten the workers suffering time from the noise
of sand making machine.
2. Improve the craft level of sand making machine. Shunkys sand making
machine has a smaller noise than other suppliers ones, usually it can decrease
34% on average.
3. Do the sound attenuation, absorption, insulation, isolation job to the
sand making machine.
4. Control the spread of noise of sand making machine.
In addition, shunky is still working on decreasing the noise of sand making
machine, which will be bound to have a better result.
Sand making machine working principle:
Stone enters sand making machine though conveyor belt. Stone is crushed by
hitting other stones. Material falls down to impellor cavity. Under great
centrifugal force, it hits material that coming downwards. After hitting each
other, they force a vortex between impellor and shell, and hit each other
several times, finally smaller stone comes out, and goes to vibrating screen.
Satisfactory material is transported to sand washing machine,
however overlarge material will go back to sand maker to be
refreshed. Output sizes can be made according to customers requirement. If input
size is larger than the designed size, other crushing equipment will be
necessary.
Shallow analysis of Jaw crusher used in stone quarrying
Jaw Crusher is a
primary crushing machine used for coarse crushing plant in stone quarrying and
mine ore mining process. It has properties of large crushing ratio, even
granularity, simple structure, reliable operation, easy maintenance, and low
cost. So this kind of jaw crusher can be widely used in mining, metallurgy, iron
ore, building material, highway, railway, water project, chemical industry, etc,
for crushing various material with compression strength less than 320MPa.
Jaw crushers are equipped
with one fixed and one moveable crushing jaw (moving jaw), both of which support
crushing plates (wearing parts) in several versions. They form a wedge-shaped
crushing zone. The walls of the crushing zone are made of replaceable wearing
sheets. Crushing is done between the two crushing jaws. The moving jaw of the single toggle jaw crusher moves
elliptically. A pendulum motion is being carried out by the double toggle jaw
crusher.blake jaw crusher is is widely used in mining and quarry.
The crushing force is produced by an eccentric shaft. Then it is transferred
to the crushing zone via a toggle plate system and supported by the back wall of
the housing of the machine. Spring pulling rods keep the whole system in a
condition of nonpositive connection. Centrifugal masses on the eccentric shaft
serve as compensation for heavy loads. A flywheel is provided in the form of a
pulley. Due to the favorable angle of dip between the crushing jaws, the feeding
material can be reduced directly after entering the machine. The final grain
size distribution is influenced by both,jaw crusher is the adjustable crusher
setting and the suitability of the tooth form selected for the crushing
plates.
The following is the process of jaw crushing plant:
After being separated, the parts that can meet standard will be taken away as
final products, while the other parts will be returned to impact crusher, thus
forming a closed circuit. Size of final products can be combined and graded
according to customer specific requirement. We can also equip dust catcher
system to protect environment.
Jaw crusher maintenance features finite element analysis technology, top
manufacturing materials, higher crushing strength, simple structure, safer and
convenient, which has greatly extended the bearings service life. Due to the
tooth guard, the whole cast steel of the bearing seat has greatly improved the
production, and have definitely occupied the leading position in our Chinas
machinery area.
The maintenance knowledge of fragile parts - Jaw plate
For some people, the concept of Routine Maintenance is like watching your
diet or going to the dentist: Everyone knows they should do itbut sometimes it
is easier just to put it off for a while. Among the wearing parts of crusher,
the most easily damaged parts are its jaw plates. After buying equipment, the
expenses on fragile replacement is also a bunch of spending. In order to improve
the work efficiency and reduce unnecessary spending, lengthening the span life
crushers jaw plate is particularly important.
There are two kinds of jaw plate used for jaw crusher: mobable jaw plate
and fixed jaw plate. The movable jaw plate is made of high-quality cast steel.
The precise machining and strict testing ensure that its high reliability and
safety. The fixed jaw plate, like the movable jaw plate, is made of
high-manganese steel, its designed symmetrically; so if one end is frayed, the
other end can be used.
The eccentric shaft is made of forging steel, which is of high stength and
rigidity. The bearing adopts four sets of the self-aligning roller bearing; it
has a great loading capacity and auto self-aligning. The fly wheel and groove
wheel are made of cast iron. Its weight and the structure can ensure the blance
of the crusher.
In the production process, jaw plates of crusher hit the material directly,
crushing force is very big, especially crushing the material with great
hardness, lead to the nut becomes loose which install the plate, has great
noise, makes the plate worn or intensified seriously even stops the crusher. In
that case, concrete analysis according to the actual situation. Particular way
is to make the spring on the crusher to be self-fastened device, put the device
to wear in the bolt tighten the nut, because after the spring was pressing to a
certain degree, they will create strong anti-vibration effect, the loose of nut
on the crusher will tighten up by the action of self-fastened device, so not
bolt looseness and prolong the service life of jaw plates. In short, it can
figure out a way to solve specific problems in using process of crusher on
specific conditions, and prevent the jaw plate loose, the wear is intensified,
broken and so on, so as to extend the service life of jaw plate, reduce the
cost, improve the working efficiency of the crusher.
While the crusher is working, the jaw plate directly contacts with material,
bear enormous crushing force and friction with material, the service life of jaw
plates directly related to the work efficiency and production cost of jaw
crusher, therefore, it is a way for the survival of enterprise that is to extend
the service life of jaw plate of crusher.
Only a qualified technician should carry out these maintenance steps. Should
your jaw crusher require basic or full maintenance, make sure you let the
experts handle your request. Remember, maintaining your assets correctly and
timeously will save your company money in the long run.
How to identify types and capacities of crushers correctly
There are complete kinds of crushers, and how to position crushing ability of
crushers? Due to different customers' demand and different practical situations,
we can choose different crushers such as jaw crusher, impact crusher, hammer crusher,
Hongxing cone crusher and so
on. So how to position the crushing ability of crushers? The crushing ability of
crushers means the amount of crushed materials in unit time, its unit is
calculated by t/h. How many factors will affect the crushing ability? There are
many factors to affect capacity of crushers:
a. The Hardness of Materials . If the materials are harder, it is harder to
crush them and the abrasion of equipments will be more serious. It will cause
lower speed of crushing and will definitely lead to smaller crushing
capacity
b. The fineness of crushed materials . If the demand on fineness is higher or
the crushed materials are requested to be finer, then the crushing capacity is
smaller.
c. The viscosity of materials. It means if the viscosity of materials is
higher, they are easier to be adhered together.
d. The better the abrasion resistance of crushing parts of crushers is, the
bigger the capacity is, If they cannot resist abrasion, it will affect
capacity.
e. Humidity of materials. It means if the moisture of materials is higher,
materials are easier to be adhered inside of crushers and easier to be blocked
in the process of delivery when discharging, which will cause capacity
smaller.
f. The composition of raw material. If there are more powder contained in raw
materials, it will cause more effect on crushing, because the powder are easy to
be adhered to affect convey. Materials contain much powder should be screened in
advance.
Reusing these materials also lightens the load on our landfills. Examples of
these materials include industrial co-generated materials such as fly-ash (from
power generation industry) and blast furnace slag (from steel
manufacturing).
And like concrete itself, old rebar is recycled into new. Incidentally, did
you know that steel and concrete are among the most recycled materials in the
world? The asphalt industry would have you believe asphalt is the most recycled
material in the world, but the truth is that much of that recycling happens
because asphalt pavements require complete demolition and reconstruction every
8-10 years.In sharp contrast, a comparable concrete pavement can easily last up
to 40 years.
Concrete is made from granite aggregate, sand, cement, and water. While
cement itself cannot be recycled, there has been increasing interest in
recycling aggregate because of the environmental costs of mining the material
and shrinking landfill space.
Concrete is an almost inert material.Because of its inert nature, but also
because it cures to a solid form, it is ideal for using industrial by-products
that otherwise would have been deposited in landfills. A stell mesh sunshaded
box of a building in the dusty industrial estate of Kranji Crescent has been
hosting a steady stream of visitors from China, Mongolia, Israel and France over
the past four months.
Concrete is made from granite aggregate, sand, cement, and water. While
cement itself cannot be recycled, there has been increasing interest in
recycling aggregate because of the environmental costs of mining the material
and shrinking landfill space. Currently, recycled aggregate is mainly used to
line the bottom of roads and cast into road kerbs, rather than used in building
structures, due to concerns about its strength.
Recycling concrete is a smart and environmentally-conscious choice that saves
resources. With in-place recycling, the recycling process has become even more
cost-effective, too!
In-place concrete recycling reduces construction costs because a contractor
doesnt have to locate a recycling center or pay for trucking the materials
away. This saves money for taxpayers and agencies.
The limestone roll crusher is suitable for crushing sulphur iron ore,
phosphate ore, barite, celestite, coke, limestone and so on. The limestone crusher can be
divided into roller crusher and four roller type crusher according to the number
of roller. The operators should to do maintenance work when roll crusher at
work, so as to extend the using life of the crusher. In this regard, look what
should pay attention when the limestone roll crusher in the work!
The most important issue of limestone crusher equipment selection is to know
what this device will have to bear the task. In other words, the limestone
crusher equipment selection is the core issue of what it is to process the
material? What the material particle size is? How much the capacity and what
kind of product will be produced? The material need to be processed is varied.
Each material has different characteristics. Some materials are crushed more
easily, while others require more crushing energy; some of the materials will be
broken into blocks, and some materials will be broken into powder; wear and tear
of some limestone crusher machine is strong, while others are caused by the wear
rate of limestone crusher equipment is very small.
Pay attention to the bolt-on condition and immediately tighten up if any bolt
loosen. Starting the limestone roll crushe first, feed material after the
machine operating normally. Regularly check the wearing parts of limestone roll
crusher, pay attention to replace wearing part at any time. Check the discharge
condition of roll crusher, eliminate material if any blocking happened.
Additionally, the machine should not be overload, pay attention to the
electric instrument at any time. The bearing of roll crusher should be refueled
timely and avoid oil leaking in the bearing. Control the bearing temperature and
not higher than the surrounding air 25 to 30 ℃. The limestone roll crusher is
widely used in cement, metallurgy, chemicals, electricity,coal and other
industries for processing the brittle and ductile materials.
In order to select limestone crusher equipment for a particular purpose,
people should know what kind of material that being crushed. For example, if the
material is limestone, you can choose the limestone crushers such as, jaw crusher, impact crusher. But the
differences between these materials is significant. Tests of materials in
laboratorycan be able to avoid some unnecessary spending a lot of information.
For example, as high wear resistance index of the quartzite-like materials
should not be fed into the impact crusher, because this equipment not only with
high maintenance costs, but also to spend a lot of time. The kind of dolomite
materials do not need to use large scale limestone crusher equipments.
As the
professional manufacturer of complete sets of mining machinery, such as ball mill,Rotary dryer,Belt conveyor,VSI sand maker, Henan Hongxing
is always doing the best in products and service.
Hammer crusher is also the contributor to Building Industry
Building materials is the basis of the buildings and structures, road
building materials for all parts of the road bed, pavement, bridges, tunnels and
other various components and structures.
This series of crusher are widely used in metallurgy, mining, chemical,
cement, coal gangue, construction, sand, refractory material, ceramic and other
industrial and mining enterprises, engaged in breaking and crushing the material
in the operation. Used for tertiary or quaternary crushing, it is mainly
suitable for crushing various ores the compressive strength of which is no more
than 320MPa.
Industries as hydropower, roads, railways, construction (urban central supply
concrete) and other sectors in China are the national infrastructure industriy,
and also are the state mainly invested industry, which have a very prosperous
prospect. Those industries above require the sand and gravel system to produce
aggregate, so as to meet the quality requirements of concrete. Hammer crusher has been widely
used in the system.
The hammer crusher application is wide in processing building materials for
construction like above. With the large-scale expansion of China's highway
construction, road building materials use and development of speed is also
faster and faster, traditional building materials widely used in foundation
engineering, but has been increasingly unable to meet the rapid development of
highway construction on standard engineering requirements. So the demand for
hammer crusher application has been increased greatly. High quality building
material need good performance hammer crusher. Hongxing hammer crusher has been
applied to construction, chemical industry, light industry and so on.
After building materials and solid materials are crushed, the internal
crystal structure changes, the surface and the unit mass can increase, can
improve the speed of physical and chemical reaction, easy mixing and improve
homogenization, and create favorable conditions for drying, storage and
delivery. This is the reason why hammer crusher application is popular in
construction industry. Hongxing hammer crusher application is wide also because
of high quality crusher hammer and rotor. The hammer crusher application can
meet different crushing request of construction material.
The structure features of the hammer crusher in the aggregate system:
1) Large feeding mouth, high crushing chamber, suitable for the materials
with high hardness and block degree, low dust pollution;
2) Convenient to adjust the gap between hammer board and board hammer,
effective to control particle size;
3) Compact structure, high rigidity, the rotor with great inertia;
4) High chromium plate hammer with large hammer resistance, abrasion
resistance and hammer force;
5) Non-key connection, easy maintenance, economical and reliable;
6) Perfect crushing-function, high productivity, high overall efficiency.
The roll crusher equipment is a very potential force in market development of
the crushing plant, roll crusher plays an important role in the process of
crushing materials, the material is repeatedly crushed by the broken parts.
Compared with hammer crusher
and impact crusher, in the
crushing of materials, the roll crusher equipment is more suitable for crushing
brittle materials.
Roll crushers have a theoretical maximum reduction ratio of 4:1. If a 2 inch
particle is fed to the roll crusher the absolute smallest size one could expect
from the crusher is 1/2 inch. Roll crushers will only crush material down to a
minimum particle size of about 10 Mesh (2 mm). A roll crusher crushes using
compression, with two rolls rotating about a shaft, towards the gap between the
rolls. The gap between the rolls is set to the size of product desired, with the
realization that the largest feed particle can only be 4 times the gap
dimension.
Roll crusher equipment has large crushing ratio and can up to 50. This roll
crusher can be used to crushing limestone in cement industry. Any company and
business that use of the roll crusher equipment or are using the production of
roll crusher has a deeper understanding of the improvement the utilization of
crushing materials. Spare parts of roll crusher equipment is easy to replace,
and has a corresponding reduction in maintenance expense. This machine is
suitable for a very large hardness of materials or used for soft materials.
Some major advantages of roll crushers are they give a very fine product size
distribution and they produce very little dust or fines. Rolls crushers are
effectively used in minerals crushing where the ores are not too abrasive and
they are also used in smaller scale production mining of more abrasive metal
ores, such as gold. Coal is probably the largest user of roll crushers,
currently, though. Coal plants will use roll crushers, either single roll or
double roll, as primary
crushers, reducing the ROM coal. Usually, these crushers will have teeth or
raised forms on the face of the roll. (Roll crushers used for minerals and metal
ores have smooth faced rolls.)
Roll crusher equipment in daily use, the maintenance of the machine must be
aware of. In particular, the operators need to pay attention to maintenance of
the roller of roll crusher equipment, because the most easy to wear and
consumption is the roller.
Measures which can give sand maker a longer lifetime
Sand maker (Sand making machine) is the
equipment which makes sand artificially. It can be impact crusher or cone crusher according to the
materiel condition and production requirement.HX series impact crusher is a
high-efficiency rock crushing equipment with domestic and international leading
level. In order to make their client to use sand making machine more exactly, do
safe operation of electrical equipment,increase of service life, they summarize
six basic safety engineering:
1. Before operation, inspect whether the observation door of vortex chamber
is shut tight to avoid danger.
2. Examine the rotation direction of impeller; impeller should performance
anticlockwise rotation.
3. The starting sequence of sand making machine and transportation equipment:
discharge→ sand making machine→ feeding; crushers must be started without load,
and feeding can be carried out when crushers run normally. Shutdown sequence and
start-up sequence is opposite.
4. Materials whose size exceeds the limit shouldnt be fed into crushers,
otherwise, it may cause the unbalance of impeller or excessive abrasion of
impeller, even leading the block of impeller passage.
5. When the discharge equipment stops, feeding should be timely ceased.
6. Materials should be fed evenly and continuously.
7. Fierce vibration and abnormal noise are not allowed during operation.
8. The addition of grease lubrication should make up 1/2-2/3 of bearing
chamber; Add proper lubrication grease each time crushers work an hour.
The construction and mining machinery/equipment market is in the midst of a
consolidation phase, as acquisitions and strategic partnerships are still
continuing after a spurt in the consolidation wave of the nineties. The highly
competitive industry has maintained price levels in the moderate range with
slight fluctuations, over the last few years.
Key competitive factors that affect construction & mining equipment
manufacturers include service, distribution networks, quality, features and
price. In addition, unprecedented growth in the rental industry transformed the
landscape for customers, manufacturers and distributors of construction
equipment. Further, key end markets for construction equipment such as mining
and forestry exert a significant impact on the industry.
Basic approaches for selecting and maintaining crusher
Stone crusher is a kind of
machine whose discharge larger than three millimeter takes up more than 50%.
Crushers usually adopts the transmission of direction connection; Optional:
magnetic separation device, automatically even vibrating feeder system. Main
part: rotor, having experienced dynamic balance test with high precision;
Hammers of good quality with special heat treatment.
However, abrasion and corrosion are two main problems we need to address
during usage. One crucial approach is to employ exquisite materials. While in
real practice, there is some contradiciton like the issue of carbon value. With
less of this value, the material hardness will be greater reduced, whereas this
value is high, materials are prone to be rusty. So we must try to find the
balance within when choosing crushers.
To abtain both of these two characters: anti-abrasion and anti-corrosion,
well consideratoin should be taken. Generally, its material hardness is no more
than 316L stainless steel with low carbon.
Generally, crushers maintenance approach can fall into the following three
categories: minor repair, medium repair and major repair with different
maintenance time respectively.
a. Minor Repair: it includes test and restore adjustmemt device, high speed
discharge opening, the replacement of liner plate, repair some transmission
part, change lubrication system, etc. Its period is about one to three
months.
b. Medium Repair: In addition to the first repair approach, it also includes
the replacement of toggle plate, test and restoration of bushing, etc. Its usual
period is about one to two years.
c. Major Repair: Besides medium repair, it contains replacement of bearings,
the casting of babbitt on the head of pitman coupling, replacement of easy-wear
parts. Its average period is more or less five years.
As the professional
manufacturer of complete sets of mining machinery, such as sand washer,Cement making plant,sand washer, Henan Hongxing is
always doing the best in products and service.
Do you want to save cost? Hongxing Crushers for you.
Of course, any businessman cares about the cost. For mining machinery
consumers, how to save money is the important thing when purchasing and
using.
In the era of thchnology economy, advanced technology has taken the leading
position in the business circle. As to buyers, it's beneficial for a long period
to purchase the advanced equipment with reasonable price. Henan Hongxing is just
the best manufacturer of mining equipment.
Fine crusher always be used in limestone raw material crushing. Such as
desulfurization limestone and gypsum fine crushing in power industry. In
metallurgical industry, fine crusher mainly used for crushing iron ore,
periclase, steel slag and son on. It can also be used for super fine crushing of
quartz raw materials in the glass industry. As well as limestone crushing in
sand stone industry and phosphate ore crushing in chemical fertilizer industry.
The crushing of these materials require a relatively small size of the discharge
products(usually under 8mm).
In this case, many customers will adopt the change two-stage crushing into
the three stages, this is a very effective means. However, people encountered
complex and difficult process layout and large investment problems in a specific
technological innovation process. While Hongxing fine crusher can solve these
problems. This fine crusher machine has the absolute superiority compared to the
similar crusher:
The maximun feeding material size can up to 1300mm, and the minimun discharge
material size can under 8mm. Fine crusher can save 35-50% of total investment
than two stage and three stage crushing system. Save 30-40% of the cost of
operation and management. Wear parts of fine crusher with long working life and
the maintenance frequency is greatly reduced.
Hongxing Brand is a 'China Famous Brand' for reliable and stable quality, and
been awarded the 'Civilized Enterprise' 'Key Enterprise' 'Enterprise with
Standard Quality' and 'Enterprise with Honesty and Credit Standing'. The company
has modernized management system, first-class gold-processing equipments,
perfect detection methods, high-quality personnel and fine after-service. We
firmly believe that we can get sincere repayment with our sincere dedication.
And it's not in doubt that ' To choose Hongxing is to choose convenience.'
As
the professional manufacturer of complete sets of mining machinery, such as China cone crusher,magnetic separator,raymond mill, Henan
Hongxing is always doing the best in products and service.
