After making sure of reserves by geological prospecting department, firstly
make a fixable study about ore bed mining to solve the problems that whether the
ore deposit has value and meet the requirements of industrial mining.
Feasibility study should include grade of ore, reserves, bury condition,
difficulty level of comprehensive dealing with ores, market demand condition and
mining method. According to primary feasibility study, finish complete feasible
report and make sure mining method.
In general, there are three types of mining methods: complete underground
mining, upper open-pit mining, underpart underground mining. As for the latter
two conditions, primary design for open pit mining is necessary which should be
conducted on the basis of necessary geological information to finish the
following work: ensure the condition of open pit mining, check productivity of
open ore, decide the mining method of strip mining as well as delivery way of
waste rock and arrangement of wines and choose machines' types and number for
punch, explosion, mining, delivery and soil discharge. Arrange ground industrial
site, ensure area and time of purchasing land, number and working-day of roads
and civil construction program, count number of workers, electricity, water and
main materials.
Furthermore, it's important to choose proper equipment for open-pit mining.
We Henan Hongxing provides various types of high quality machines, jaw crusher, vertical
impact crusher, hydraulic cone crusher,
movable crushing station and so on. Good weapon is the key to succeed.
Make basic construction progress plan of mine and count technical and
economic index, such as the total amount of mine program and total investment.
After the primary design is agreed by investors, make out construction design
for each program and lastly get into mining.
Significance of factor on crushability and grindability of ores
Crushability factor and grindability factor of ores reflect hardness of
crushing and grinding of ores. If adopt the same crushing machine under the same
condition to deal with hard ores and soft ores, the former has low productivity,
and large power dissipation. Thus, the factor reflects the hardness of ores and
can also be used for measuring the craft index of crushing ores and grinding
machines quantitively. It is used widely.
The representation of crushability factor and grindability factor is as
following:
Crushability/grindability factor=the productivity of the crushing machine
that crushes/grinds (jaw
crusher, impact crusher, ball mill, rod mill) certain ores
under the same condition/the productivity of a crushing/grindingmachine (cone crusher, Raymond mill) that crushes/grinds
(roll crusher, cone ball mill) medium hard ores.
Quartz is always considered as standard medium hard ore and a compare
standard and its crushability factor and grindability factor is defined as 1.
Crushability factor and grindability factor of hard ores is lower than 1 while
that of soft ores is higher than 1.
The application of crushers in water conservancy project
Nowadays, there mainly are cone crusher, jaw crusher, impact crusher and sand making machine for
making sandstone in water conservancy project. Gyratory crusher and cone crusher
are heavy equipment, needing huge investment size; materials after crushing by
jaw crusher has high content of needle flake with severely destroyed structure;
Vertical shaft sand
maker has limited feeding granularity and small crushing ratio; rod mill is
more fit for wet method. All of the following types of machines can not satisfy
technology and economy demanding of asphalt concrete mineral aggregate crushing.
So it is an effective way to study mineral crushing craft composed by impact
crusher and vertical impact crusher.
From crusher working principle and its actual using condition, impact crusher
and vertical impact crusher are both mature type, having impact crushing
function as well as grinding function with big crushing ratio, small damage on
skeleton structure and high efficiency as well as good granularity and directly
controllable grain size, which are normally used in crushing limestone. The
former one has a vast application in each stage of water conservancy and
Building and Decorative Materials as well as Metallurgy industry in which can
clearly drop needle flake content. The latter one is a mature product in abroad
with vast application. In recent years, our country develops this type machine,
mainly for ore crushing in cement factory. It is also very successful in the
application of water conservancy with outstanding feature of fitting for
producing fine well-shaped materials.
With the increase of house price, demands for ball mills raise
In recent years, there are various price increase, such as iron ore, house
price, petro oil. For the house price of China is abnormally high for hundreds
of millions of ordinary people, and which is overburdened for them to purchase,
they only have to sigh deeply with the price and have nothing else to do. With
the rapid development of economy and the process of urbanization and
industrialization, the investment to infrastructure , such as road, railway, and
water conservancy will be increased, which will leads to the rigid demand to
mining machinery, for example, jaw crusher, impact crusher, belt conveyor, stone crusher.
Meanwhile, more housing construction will directly stimulate the development and
expansion of ball
mill market.
It is generally acknowledged by the industry insiders that at the peak moment
of real estate, wholesale building concrete is needed, and considering the full
use of energy source and environmental protection, it is really very
troublesome. While the application of aerated concrete relieves this condition,
for the raw material of this comes from coal ash, sand dust, coal gangue, and
waste residue. Ball mill is not only the indispensable production facility in
cement, mine, metallurgy and ceramics, but also the fine grinding machinery in
industrial production.
It is ore grinding equipment that use steel ball to work as ore grinding
medium, is the key equipment for recrushing after the material was crushed. Ball
mill has many types, such as cement ball mill, energy-saving ball mill, ceramic
ball mill, intermittence ball mill and so on. They are used for the grinding of
lime, gypsum, sand and slag. The grinding process is high power consumption, and
ball mill is the essential department in aerated concrete equipment. The
building industry promotes the development of aerated concrete industry, as well
as stimulates the widely use of ball mill.
Nowadays, China sticks to the sustainable development of 'reduce, reuse, and
recycle'. So PE jaw crusher, hydraulic cone crusher,
high efficiency concentrator appear We can see that, the government-led,
business-oriented, and community-wide participated energy conservation pattern
is gradually formed in China. Energy conservation is not only the urgent pursuit
of the development of industry, but also related to people's livelihood. With
the technology development of ball mill, its environmental protection and
economical efficiency is getting more and more attention. Henan Hongxing designs
and produces enery saving cone ball mill, high-efficiency micro powder making
machine. Therefore, only the continuous energy conservation and innovation can
realize the permanent development of ball mill.
1). Jaw crusher: jaw crusher is characterized by its big crushing ratio, even
granule, plain structure, reliable operation, easy maintenance, and convenient
delivery.
2). Hammer crusher: (ring hammer) is called hammer broken for short, and
mainly applied for crushing all kinds of fragile material, such as coal, salt,
gypsum, alum, brick-tile, and limestone, etc.
3). Impact crusher: is applied for crushing hard material, such as the
crushing of limestone in cement
plant, and is characterized by high productivity and small particle
size.
4). Compound crusher: is suitable for crushing limestone, clinker, coal and
other mineral materials in building materials, mining industry, and chemical
industry. The characters are: high production capacity, big crushing ratio, low
energy consumption, steady operation, and convenient maintenance.
5). Roll crusher: also called roll crushing mill, is mainly for crushing
medium hardness ore and rocks in the areas of beneficiation, chemistry, cement,
and building materials.
6). Shaft impact crusher: also called sand making machine, is widely
used for the intermediate crushing and fine crushing of hard and fragile
abrasive, fireproofing, cement clinker, iron ore, and aggregate. The PCL series
shaft impact crusher is also suitable for the use of sand in construction and
paving road.
For derusting sand making machine, Hongxing tells the ways
Impact crusher is also
called sand making machine.
For sand production line, impact crusher, jaw crusher, vibrating screen, belt conveyor are the
main equipment. The working environment of sand making machine equipment leads
to the rusting of sand making machine, which is a normal chemical reaction. When
the machine is placed in the air for a long time, it will be easy to get rusty.
The working environment of sand making machine is generally quite poor, it is
likely to get rusty and affect the production quality. So how to maintain and
correctly operate the sand making machine equipment is becoming more and more
important. How to deal with the process? Hongxing gives you some workable
ways.
1) Chemical derusting: mainly by the chemical reaction between acid and
metallic oxides and thus remove the rust corrosion on the metal surface, which
is known as pickling rust, and can only be operated in the workshop.
2) Small-sized pneumatic or electric derusting: electricity or compressed air
is worked as driving force and equipped with suitable derusting device for
reciprocating or rotary movement to meet the derusting requirements of a variety
of occasions. For example, the angel grinder and wire brush which belong to
semi-mechanized equipment are very light and handy, and of great mobility. They
can completely derust but can not achieve high qualified surface treatment.
3) High-pressure water abrasive derusting: by the impact of high-pressure
water jet (plus the grinding effect of abrasive), the prized role of water
damage and corrosion and the coating's adhesion on the plate shelves. Its
characteristics are: no dust pollution, no damage to steel and high derusting
efficiency.
4) Daubing anti-oxidation paint derusting: daubing mineral oil, paint or
enamel on the surface of ironwork, or plating a layer of metal such as zinc,
tin, chrome, etc by electroplating or hot dip. The surface of these metals can
form a dense sull that can prevent contacting with water, air and other
materials.
We are the professional manufacturer of stone crushing line, sand making
equipment, ore dressing equipment. Our crushers, ball mills, rod mills,
magnetic separators
have all passed ISO9001:2000.
With the rapid development of mining machinery industry, and the increased
demands of our country to the use of resources, energy conservation, and
environmental protection, high-tech mining machinery and equipment will usher in
their splendid development. Mining machinery, especially crusher, is a kind of
important equipment for industrial raw materials and energy production.
Improving its efficiency is the key point for the conservation of resource and
energy.
With the large number of small coal mines, small metallurgy, cement
enterprises were shut down, the new large-scale concentrator; large coal
preparation plant and the construction of a large cement plant have put forward
higher requirements to mining machinery. The need for large capacity crushing
and screening equipment, for high efficiency and reliable operation of equipment
is urgent. The well-known manufacturer of mining machinery, Henan Hongxing
Mining Machinery Co., Ltd. because of its excellent production of crushing and
screening equipment, advanced technology and energy efficient features, the
company has developed and manufactured many crushing and screening equipment,
mobile crushing plant, jaw crusher, mobile crusher, impact crusher,
floatation machine, sand making
machines, sand production line, grinding mill, ball mill, etc. all of
which are the hot focus of mining machinery, construction, roads, railways,
metallurgy and other areas. The automatic, energy saving and efficient,
large-scale crushing and screening equipment will be the highlighted research
for crushing equipment manufacturers.
The crushing and screening equipment is very essential and necessary for the
production of industrial raw material and energy. To improve its efficiency is
the key link for resource and energy saving.
The primary expanding branch of China construction machinery
'1025' period, China's economy will be strong up the development of
construction machinery industry continued to provide important impetus to
benefit from this, combined with business innovation and competitiveness on the
rise, China's construction machinery industry will continue to remain high run.
Expected in 2017, China's construction machinery industry will achieve 17
percent revenue growth, exports will increase by 25%, the export industry will
be fully restored to the level before the international financial crisis.
Expected to 'second Five', China's construction machinery sales will reach 900
billion yuan, exports will exceed $ 26 billion. With the speed, mining machinery
industry will make greater progress, jaw crusher, impact crusher, ball mill, Raymond mill all have
bright markets.
Experts believe that the impact on demand for construction machinery industry
has three major policy force.
First, the housing projects is the construction machinery industry is one of
the major driving force.
February 2011, the Department of Housing and Urban-Rural Development and the
provinces, autonomous regions, municipalities and separately listed cities
signed the 'affordable housing target of responsibility', to be completed this
year, 10 million units of affordable housing construction tasks. According to
the Ministry of Housing and Urban data, in 2010 the construction of affordable
housing projects reached 5.8 million units, investment of more than 800 billion
yuan. In 2011 the construction of affordable housing projects 10 million units,
the new investment of more than 600 billion yuan. This calculation, the 2017
investment or affordable housing projects will reach 1.4 trillion yuan.
Second, the railway investment will exceed 3 trillion yuan, is also an
important impetus for construction machinery. Especially recent years, road
construction flourishes which pushes the sales of jaw crusher, excavator, stone crusher, crane.
China's comprehensive transportation system, 'five' special plan shows '1025'
period will build 40,000 km rapid rail network is expected to '1025' period will
reach 3.5 trillion yuan rail investment around.
Third, investment in water conservancy construction in the next 10 years will
be 40,000 yuan, the construction machinery industry the third largest driving
force.
Out of the 'three rural' development, energy conservation, and many other
considerations, experts predict the next 10 years China's infrastructure
investment in fixed assets will focus on rail, road transfer to the water
conservancy construction.
January-April 2011 the fixed assets investment up 25.4%, which in April
invested 291.151 billion yuan in fixed assets, an increase of 1.42%, changing
the fixed asset investment growth slowdown, mainly in the tertiary industry
increased by 26. 50% of road traffic in April increased by 23.60%, with further
investment in water conservancy construction, but also bring new demand for
construction machinery.
Rapid increase in size and quality at the same time, China's construction
machinery enterprises in product, technology and innovation capability of
continuous fast forward. Through innovation and introduction, digestion and
absorption of advanced technology, a large number of leading technologies with
independent intellectual property and products to market, especially in large,
high-end, intelligent product research and development of construction
machinery, construction machinery enterprises in China continue to achieved a
major breakthrough, such as 2000 tons crawler crane 1600 ton crawler crane, 500
tons, 800 tons and 1,200 tons all terrain crane, 510-horsepower bulldozer, 12
tons loaders, 46 ton forklift, the fourth generation of road machinery, the long
arm of the world's most concrete pump frame, the horizontal arm back to the
world's largest rose D5200-240 transferred from tower cranes, etc. These
products are not only a high level of China's equipment manufacturing industry
representatives, but also broke the large and very large imports of construction
machinery products situation.
Although China's construction machinery business all these years has made
great progress, but whether it is in the level of technology, technological
innovation and product-level and advanced foreign enterprises there is still a
gap. In addition, we must clearly recognize that the key parts of construction
machinery industry controlled by others, elements of the enterprise costs
continue to rise, the order of competition within the industry is not
standardized, will have a negative impact of construction machinery industry
needs to accelerate the development and improvement. As to mining machinery
industry, there are the bright future for stone crushers, belt conveyors,
energy-saving cone ball mill, cone crusher, flotation machines and
so on.
General introduction for working principle of screening
In mining process, screen plays the unique role. There are vibrating screen, high
efficiency vibrating screen. Generally speaking, the screening process can be
defined as follows: Make broken materials of different particle sizes pass
through the single-deck or multilayer screen surface with uniform screen mesh
and then classify the materials into different levels of gradation. In theory,
the particle sizes bigger than the sieve mesh are called screen overflow, while
the particle sizes smaller than the sieve mesh are referred to as screen
underflow.
The screening process of broken materials can be composed of two stages, that
is, fine particles passing through the material layer formed by superfine
particles and reaching the screen surface, and fine particles passing through
the sieve mesh. If you want to complete the two stages mentioned above, the most
fundamental condition required is that there should exist relative motion
between the materials and the screen surface. Consequently, the screen box
should be with corresponding motion characteristic. On the one hand, it can keep
the material layer in loose condition, and on the other hand, it can help to
remove the coarse particles stuck in the sieve mesh and meanwhile make the fine
particles successively pass through the screen.
Technology comparison between an impact crusher and hammer crusher
As we know, impact crusher
and hammer crusher
both are the main equipment in stone production line. They have
similarities and differences. As to the advanced technology, let's make a
comparision.
The unique working principle of impact crusher overcomes the many defects of
hammer crusher. At first, the discharging particles of impact crusher mainly are
granular, while hammer crusher does maybe have much power. In addition, impact
crusher can effectively deal those materials with moisture, thus it can reduce
the jam phenomenon.
When the material contain much moisture, the feeding chute and impact board
of impact crusher can be equipped with heating device, prevent the bond of
material. And impact crusher dont need equip with the bottom sieve plate, it
just can effectively avoid the block phenomenon. However, hammer crusher cant
adopt heating way to prevent the bond of material, and need equip the bottom
sieve plate, thus it just increase the possibilities of jam.
Impact crusher not only can apply on soft material, but also apply to the
very large hardness material. The plate hammer of impact crusher adopts the
mechanical firm structure and fixed to the rotor, thus when the rotor move, it
has more rotator force. Relative to hammer crusher, the rotor of impact crusher
has more momentum, suitable to crushing the more hard material and saving
energy.
Impact crusher can adjust the discharging particle convenient, and the
adjusting range is extensive. Impact crusher can adjust the discharging particle
by so many ways, such as adjust rotor speed, impact plate and the space of
grinding cavity, etc. the gap adjustment can be done through mechanical or
hydraulic way, and hydraulic adjustment system can easy operate the button or
long distance control system to accomplish the space adjustment. While impact
crusher adjust the discharging particle only by changing bottom sieve plate.
Wear-resistant parts of impact crusher are so few compared with hammer
crusher, and higher use ratio of metal.
The replacement of spare parts is so simple, thus the cost of maintenance
will less. The impact crusher rotor just installed six plate hammers, and
replacing a set of plate hammer just needs short time. And the replacement of
bottom grinding cavity also need about ten minutes, and then which greatly
reduce the cost of infection and maintenance. However, the hammer of hammer
crusher has more than 100 pair; it will spend a lot of time and labor power to
replace a set of hammer, the cost of inspection and maintenance is higher than
impact crusher. Replacement of bottom sieve plate is also trouble.
In addition to impact crusher and hammer crusher, there are jaw crusher, cone crusher, roll
crusher, sigle-stage roll crusher, mobile crushing plant. Facing different
working circumstance, proper crushers can make greatest profits.
In recent years, India's economic is developing fast, urgently request to
speed up the construction of infrastructure. Then It is proposed to large demand
of grinding equipment. It is reported that India's demand for grinding equipment
will increase substantially from 2011. In the next five years, the demand will
be more strong growth in China, is the optimal period for developing grinding
equipment industry in Indian Market.
In recent years India grinding equipment sales are in 1.5 billion to $2
billion, the annual rate of growth between 20% ~ 30%. Presently, the concrete
products utilization rate is less than 1%, so in the next five years, the usage
will grow by 30% and concrete equipments have a great potential market.
The Indian government regard infrastructure as one of the key economic
development. Road construction equipment, crane, a vast market of elevators,
material conveying equipment and heavy-load transportation tool demand will have
certain growth. With the advantage of good quality grinding mill equipment,
Henan Hongxing Machinery will expand the market in India. Now, our Raymond mill, high
strength pulverizer, micro powder mill, ball mill, vertical
mill are launched and welcomed at home and abroad. In international market, it's
the key to grasp every chance.
