Crusher

1. In the process of ore crushing, according to the operation mode and the particle size of crushing procts, crushing equipment can be roughly divided into crusher and grinding machine
the crusher is used in the coarse crushing stage. Generally, the feed particle size is larger, and the proct particle size is also larger, usually more than 6 mm (- 6 mm accounts for less than 60%). Their basic feature is that the working parts do not contact each other and keep a certain gap. According to the crushing mode and principle, it can be roughly divided into the following four types:
(1) jaw crusher (also known as Laohukou), which is an old and widely used crushing equipment. The crushing action is that the moving jaw periodically approaches and leaves the fixed jaw. Crushing the ore block between the two jaw plates (mainly crushing) and discharging (falling by self weight) is intermittent crushing. According to the movement characteristics of moving jaw, jaw crusher can be divided into simple swing (double toggle plate) and compound swing (single toggle plate)
(2) cone crusher is a continuous crushing equipment. According to the feed and proct size, cone crusher is divided into circular cone crusher and medium and fine cone crusher. According to the length of the parallel belt B (the gap between the moving cone and the fixed cone) of the crushing chamber, it can be divided into standard type, intermediate type and short head type cone crushers
both rotary cone crusher and jaw crusher belong to coarse crushing equipment, but because the cone crusher works continuously, its proction capacity is much larger than jaw crusher when the feeding properties are the same. The standard type and the short head type are used for medium crushing and fine crushing equipment respectively, while the intermediate type is between the two. Generally, it is used as the second crushing equipment when two-stage crushing
(3) impact crusher, which uses the "free" crushing principle of impact force to crush ore, the ore is crushed in the crusher by the impact of impact plate (plate hammer) and impact plate, and the complex effect of multiple collisions between ore. Therefore, the crusher has the advantages of large crushing ratio, high efficiency and less over crushing. It is a promising crushing equipment
(4) roller crusher. The ore is fed into two opposite rotating round rollers (smooth or non smooth) from the upper part. It is drawn into the crushing chamber by the friction between the material and the roller surface and crushed by the roller. The crushed ore is discharged from the gap between the two rollers by gravity. It is mainly used for medium and fine crushing of medium hard and brittle materials.

2. There are many reasons why jaw crusher doesn't rotate. It may be that the installation is incorrect or damaged. In addition, it may be unreasonable when adding materials. This is also the reason why jaw crusher doesn't rotate. Then you can see if the voltage meets the requirements. These are all possible reasons
the movement of movable jaw plate of jaw crusher is realized by means of eccentric connecting rod and thrust plate, which is composed of flywheel, eccentric shaft, connecting rod, front thrust plate and rear thrust plate (commonly known as elbow plate). Two flywheels are respectively installed at both ends of the eccentric shaft. The eccentric shaft is supported in the bearing on the side wall of the frame, and the discharge material is processed by the mill
the upper part of the connecting rod is installed on the eccentric shaft, one end of the front and rear thrust plates are respectively supported on the grooves of the thrust plate support on both sides of the lower part of the connecting rod, the other end of the front thrust plate is supported in the thrust plate support on the lower part of the movable jaw, and the other end of the rear thrust plate is supported in the proction of the thrust plate on the rear wall of the frame. After that, it can be processed by the pulverizer, ultra-fine pulverizer and micro pulverizer
when the motor drives the eccentric shaft to rotate through the belt pulley, it makes the connecting rod move up and down, thus driving the thrust plate to move. The angle formed by the front and rear thrust plates is constantly changed, which drives the moving jaw to move. Movable jaw crusher www.ksepj.com The jaw plate swings back and forth around the suspension shaft to crush the ore. When the movable jaw swings forward, the horizontal pull rod balances the inertial force generated by the movable jaw and the thrust plate through the spring, so that the movable jaw and the thrust plate are closely combined without separation
when the moving jaw retreats, the spring can help. The eccentric shaft is an important part of the crusher and drives the connecting rod to move up and down. Because it bears great crushing force when working, it is generally made of high-quality alloy steel
the connecting rod is made of cast steel because it bears tensile force ring operation. In order to rece the quality of the connecting rod, the lower section of the connecting rod is often made into I-shape, cross shape or box shape. Large jaw crusher mainly uses combined connecting rod. The combined connecting rod has the advantages of small mass, material saving and simple safety device
the thrust plate, also known as the elbow plate, is a bar that transmits motion to the moving jaw, and it is also used as a safety device. Changing its length can also adjust the size of the ore outlet. Generally cast iron into a whole, but also cast into two pieces, and then connected with bolts or rivets.

3. Spring crusher, also known as spring crusher, or spring cone broken, can not reverse crusher, for reference only

4. It is suggested that you choose the ore crusher. The ore crusher proced by liming heavy instry belongs to primary or secondary crushing. The selection of crusher depends on the output, wear degree, cost performance and low operation cost

5. Henan jaw crusher unique working principle Henan jaw crusher main working parts with a hammer (also known as hammer) rotor. The rotor consists of spindle, disc, pin and hammer. The motor drives the rotor to rotate the drum dryer at high speed in the crushing chamber. The material is fed into the machine from the upper feeding port, and is crushed by the impact, impact, shearing and grinding of a high-speed hammer. In the lower part of the rotor, there is a sieve plate. The particles smaller than the size of the sieve hole are discharged through the sieve plate. The coarse particles larger than the size of the sieve hole remain on the sieve plate and continue to be hit and ground by the hammer. Finally, they are discharged through the sieve plate to the rotary dryer outside the machine. The bearing table and the fixed knife table of the machine are on the same plane, which shortens the length of the main shaft, so the structure is compact. The screen channel is ladder shaped, which increases the angle of the screen piece, and increases the powder discharge area, so that the crushing effect is good and the screen piece is easy to replace. The bearing bears all the load of the machine, so good lubrication has a great influence on the bearing life, which directly affects the service life and operation rate of the machine. Therefore, the injected lubricating oil must be clean, and the seal must be good. The main oil injection place of the machine is rotating bearing, rolling roller bearing, all gear movable bearings, sliding plane sand proction line. Pay attention to check the wear degree of easily worn parts and replace worn parts at any time. Dust and other objects should be removed from the underframe plane of the movable device, so as to prevent the movable bearing from moving on the underframe when the machine encounters materials that cannot be broken, resulting in serious accidents. If the bearing oil temperature rises, stop the machine immediately to check and eliminate the cause. If there is impact sound when the rotating gear is running, it should be stopped immediately for inspection, and the newly installed tyre is easy to loose. It is necessary to check Raymond Mill frequently. Pay attention to whether all parts of the machine work normally
the crusher makes use of its unique working principle: under the condition of constant discharge time, it can increase the swing times of transmission, that is, increase the number of machine revolutions, thus increasing the proction capacity of crusher manufacturers. Because the transmission must crush a certain amount of ore every time it goes back and forth, and discharge the crushed ore and cement proction line in the drive idling stroke. Increasing the rotation number of crusher can increase the number of times of discharging crushed ore, and the proction capacity of jaw crusher will increase. It takes a certain time to discharge the crushed ore, so after the revolution is increased to a certain extent, the material may not be discharged, and the proction capacity cannot continue to increase the composite crusher
from the point of view of ore discharge, it is a limited jaw crusher company to improve the rotation number of crushers. It is an unlimited dryer equipment to improve the speed of transmission from the transmission pressure stroke. The crusher is equipped with a special valve. When the belt pulley rotates for the first turn, the valve closes and the piston moves to drive and swing the sand washer. When the belt pulley rotates for the second turn, the valve opens and the oil is discharged into the high-pressure container through the valve. The piston moves but does not transmit to the transmission, which creates a gap. In other words, every two turns of the belt pulley, the transmission only proces a reciprocating high-pressure micro grinding. When the price of hydraulic drive fine crusher is generally the same as that of fine crusher, the hydraulic drive device can make the compression stroke twice as fast, so as to rece the working cycle time of the crusher, so as to improve the proction capacity of Hongxing Machinery Plant. Jaw crusher is at home and abroad painstakingly large machine execution, intelligence, therefore, the number of machines to rece vibration, rece equipment costs and management costs, rece equipment factory website will be the initial investment, just to implement automatic detection and control. From the current development prospects of the domestic market, the domestic market demand for vibration feeder will be increasing, impact crusher.

6. Preparation work before jaw crusher start: before jaw crusher start, the equipment must be checked comprehensively. Check the wear condition of the broken tooth plate, and adjust the size of the ore outlet; Check whether there is ore in the crushing chamber. If there is large ore, it must be taken out; Check whether the coupling bolt is loose, whether the protective cover of pulley and flywheel is in good condition, whether the tightness of V-belt and pull rod spring is appropriate, whether the oil volume of oil storage tank (or dry oil reservoir) is full, whether the lubrication system is in good condition, whether the electrical equipment and signal system are normal, etc.

7. Unknown_Error

8. The
content of gold in
ore
is very low. In order to extract
Gold
, it is necessary to crush and grind the ore and preconcentrate or separate gold from ore by mineral processing. Gravity separation and flotation are widely used in gold ore dressing,
gravity separation
plays a very important role in
placer gold
proction,
flotation
is widely used in rock gold mines. At present,
about 80% of rock gold mines in China adopt this method for gold dressing,
beneficiation technology and equipment level have been greatly improved< (1) crushing and grinding
according to the survey, most gold concentrators in China use
jaw crusher
for coarse crushing
, standard type
cone crusher
for medium crushing, and short head type
cone crusher
and counter roller crusher for fine crushing. Medium and small gold concentrators mostly adopt two-stage one closed circuit crushing process, while large gold concentrators adopt three-stage one closed circuit crushing process< In order to improve the proction capacity of mineral processing and tap the potential of
equipment, the crushing process has been reformed to improve the utilization coefficient of
grinding machine. The main measures adopted are to implement more crushing and less grinding and rece the particle size of ore into grinding< (2) gravity separation
is widely used in rock gold mines, mostly as an auxiliary
process to recover coarse gold in grinding circuit, creating favorable conditions for flotation and
cyanidation
process, improving
beneficiation index
, increasing total
recovery of gold
, playing a positive role in increasing
output
and recing cost. More than 10 gold concentrators in Shandong Province have adopted gravity separation process, and the average total recovery rate can be increased by 2% ~ 3%. The enterprise has good economic benefits. According to incomplete statistics, it can get several million yuan of profit every year. Henan, Hunan, Inner Mongolia and other provinces (regions) have also achieved good results, the main equipment used are
chute
,
shaker
,
jig
and short cone
cyclone
and so on. From the view of most gold mines in China, the combined flotation gravity flowsheet (gravity separation for flotation tailings) is suitable for use. In the future, we should vigorously promote the stage grinding stage separation flowsheet and advocate the principle of early recovery< (3) flotation
according to the survey, about 80% of China's rock gold mines adopt flotation method for gold separation, and the
concentrate proced is mostly sent to non-ferrous smelters for treatment. In recent years, the proct structure has changed greatly e to the increasing development of
cyanidation
gold extraction
and the enterprises' efforts to improve
economic benefits and rece
concentrate transportation loss
. In situ treatment is often adopted (of course, e to the contradiction between beneficiation and metallurgy and pricing problems, the mines are forced to conct on-site treatment) to promote the development of flotation process, It plays an important role in gold proction. There are usually two kinds of flotation processes: preferential flotation and mixed flotation. In recent years, new progress has been made in technological process transformation and
reagent
addition system, and flotation recovery has been significantly improved. According to the investigation results of flotation process indexes of more than 40 gold concentrators in China, the flotation recovery rate of sulfide ore is 90%, and a few of them are as high as 95% ~ 97%; The recovery of oxide ore is about 75%; Some of them are 80% - 85%. In recent years, there are a lot of innovation and scientific research achievements in flotation process, and the effect is obvious. Stage grinding flotation process and gravity flotation combined process are the main trend of flotation technology development in China.

9. There are three uses of rod mill: in order to prevent the harm caused by over grinding, rod mill is often used in gravity or magnetic separation plants of tungsten tin ore and other rare metal ores

2) when the two-stage grinding process is used, if the first stage is from 20-6 mm to 3-1 mm, and the rod mill is used as the first stage grinding equipment, the proction capacity is larger and the efficiency is higher. Because the surface area of a certain weight of rod load is much smaller than that of the same weight of ball load, the proctivity and efficiency of rod mill are lower than that of ball mill in the second stage of fine grinding

3) in some cases, it can replace the short head cone crusher for fine crushing. When dealing with softer or less hard ores (especially those with high viscosity) and grinding 19-25 mm (or even 32 mm) ores to 6-10 mesh with rod mill, the configuration is simpler and the cost is lower than that with short head cone crusher and screen in closed circuit, and the st removal of crushing workshop can be simplified. For hard ores, it may be more economical to use the short head cone crusher to form a closed circuit with the screen. Whether ball mill or rod mill should be used in the design must be determined by making plans according to the specific situation and comparing them

rod mills are widely used in metal and nonmetal mines, water conservancy and building materials departments to grind various ores or rocks

the rod mill is driven by the motor through the recer and the surrounding big gear, or by the low-speed synchronous motor directly through the surrounding big gear to drive the cylinder to rotate. A suitable grinding medium steel bar is installed in the cylinder. Under the action of centrifugal force and friction, the grinding medium is lifted to a certain height and falls in the state of throwing or releasing. The grinded material continuously enters into the cylinder from the feeding port, and is crushed by the moving grinding medium, and the proct is discharged out of the machine through overflow and continuous feeding force for the next operation.

10. Performance characteristics of rod mill:
the particle size characteristics of rod mill procts are related to the situation of rod grinding ore. When the bar strikes the ore, it first strikes the coarse particles, and then grinds the smaller particles, thus recing the risk of over crushing. When the bar rotates and rises along the liner plate, coarse particles are sandwiched between them, like bar screen, which allows fine particles to pass through the cracks of the bar. This is also concive to crushing coarse particles and concentrating coarse particles in the place where the grinding medium strikes. Therefore, the proct of rod mill is more uniform and the over grinding is lighter

difference:
1. Grinding medium
(1) ball mill: the grinding medium in the mill is mainly steel ball or steel section. This kind of mill is most commonly used
(2) rod mill: steel rods with a diameter of 50-100 mm are installed in the mill as grinding medium. The ratio of length to diameter of rod mill is generally 1.5-2
(3) baseball mill: this kind of mill usually has 2-4 bins, in the first bin, cylindrical steel bars are loaded as grinding medium, and then each bin is loaded with steel balls or steel sections
the ratio of length to diameter of the ball mill should be about 5, the ratio of the length of the bar bin to the effective diameter of the mill should be between 1.2 and 1.5, and the length of the bar should be about 100 mm shorter than that of the bar bin, so as to facilitate the parallel arrangement of steel bars and prevent cross and disorder of bars
(4) gravel ball mill: the grinding media in the mill are gravel, pebble, ceramic ball, etc. Granite and porcelain are used as lining plates. Used in white or color cement and ceramic proction< (1) steel rods with diameter of 50-100 mm are commonly used as grinding medium in rod mills, while steel balls are used as grinding medium in ball mills. The length of steel rods is 25-50 mm shorter than the cylinder, and high carbon steel with carbon content of 0.8% - 1% is often used; The loading capacity of the rod is about 35% - 45% of the effective volume of the rod mill. When observed with naked eyes, the horizontal plane of the rod is about 100-200 mm below the cylinder centerline
(2) the ratio of length to diameter of rod mill cylinder is generally 1.5-2.0, and the inner surface of lining plate on end cover should be vertical plane. The purpose is to prevent and rece chaotic movement, bending and breaking of steel rod in cylinder, and ensure regular movement of steel rod. The ratio of cylinder length to diameter of ball mill is small, and in most cases, the ratio is only slightly greater than 1
(3) rod mill adopts overflow and open discharge instead of grid plate discharge; The diameter of the hollow journal at the discharge end is generally larger than that of the ball mill of the same specification. The rotational speed of the cylinder of the rod mill should be lower than that of the ball mill of the same specification, so that the medium in the cylinder can work in the state of dropping down
3. Proction capacity
both ball mill and rod mill are important mine mills. Their proction capacity is related to the following factors: grindability of ore, particle size of feed and final proct, type and size of mill, shape of liner, shape, size, proportion, hardness and density of grinding medium, working speed of mill, filling rate of grinding medium, grinding concentration, The amount of return sand and the working efficiency of classification equipment. Because there are many factors that affect the proction capacity of the grinding machine, and the factors vary greatly, there is no theoretical formula to accurately calculate the proction capacity of the grinding machine. Therefore, the proction capacity of grinding machine is generally calculated by approximate method according to empirical formula. There are two commonly used calculation methods: grinding machine according to the unit proction capacity of ore meter calculation method (also known as volumetric meter algorithm) and grinding power calculation method. The volume calculation method is commonly used in China, which is more convenient< (1) rod mill is often used in gravity separation or magnetic separation plant of tungsten tin ore and other rare metal ore in order to prevent the harm caused by over crushing
(2) in some cases, it can replace short head cone crusher for fine crushing. When dealing with softer or less hard ores (especially those with high viscosity) and grinding 19-25 mm (or even 32 mm) ores to 6-10 mesh with rod mill, the configuration is simpler and the cost is lower than that with short head cone crusher and screen closed circuit, and the st removal of crushing workshop can be simplified. For hard ores, it may be more economical to use the short head cone crusher to form a closed circuit with the screen.