How to reduce ball abrasion of ball mill?

Product introduction:https://www.lvssn.com/mill/Cement-ball-mill.html

In the grinding operation, the consumption of ball mill steel ball is very large, about 10 times more than the loss of ball mill lining plate.In order to make up for the loss of steel ball and keep the ball size unchanged in the mill, it is necessary to add steel ball regularly according to a certain ratio.

The consumption of ball mill steel is mainly caused by mechanical wear and corrosion wear, which is an irreversible process of "physical-mechanical" and "physical-chemical" occurring on the solid surface. So on the premise of ensuring the quality of grinding the ball mill,how to reduce ball abrasion of ball mill?

 

1. Change the grindability of ore

 

The grindability of feed material to the ball mill is one of the reasons that affect the energy consumption of ball mill steel ball. Generally, if the grindability of feed material is small, the ore is easy to wear.Conversely, the opposite is true.

In the actual production, if the ore is difficult to grind or the ore requires fine grinding, it can be considered that certain chemical agents can be added in the grinding process to improve the grinding effect and increase the grinding efficiency if the economic and site conditions allow.Or the ore is heated to change the mechanical properties of the whole ore, reducing the hardness of the mineral.These two methods can effectively reduce the energy consumption of the ball mill.
 

2. Reduce feed particle size

The ball mill into the grinding particle size is large, the work of the ball mill on the material is also larger, in order to reach the specified grinding fineness, the workload of the ball mill is bound to increase, then, the energy consumption of the steel ball will increase.

In order to reduce the power consumption of the ball mill, the feed particle size of the ore can be reduced. Therefore, the product particle size of the ore is required to be small, that is, "more crushing and less grinding" should be achieved.
 

3. Control the filling rate of steel ball

 

When the rotation speed of the ball mill reaches a certain degree, the filling rate is large, and the steel ball strikes the material more times, the grinding area is large and the wear is fast. In addition, the filling rate is too high, and the movement state of the ball of the ball of the ball mill will be changed, reducing the impact effect on the large particle material.On the contrary, if the filling rate is too small, the grinding action is weak.

At present, the filling rate of steel ball in mill operation is generally 45%~50% for grid mill and 38%~42% for overflow mill.If according to the actual situation of each dressing plant, it is not a reasonable filling rate, so it is necessary to determine a reasonable filling amount through the dressing test.
 

4. Control the size and proportion of steel ball

Because the steel ball in the ball mill and the material is point contact, if the steel ball diameter is too large, the crushing force is large, it will lead to excessive wear, and easy to cause the material along the direction of penetration force broken, affecting the grinding efficiency.

In addition, under the same filling rate of steel balls, if the ball diameter is too large, the individual number of steel balls will be less, the probability of breakage will be low, over-crushing phenomenon will be intensified, and the product granularity will be uneven.The ball is too small, the crushing force on the ore is small, and the grinding efficiency is low.Therefore, reasonable steel ball size ratio can not only reduce steel consumption of the ball mill, but also effectively improve grinding efficiency.
 

5. Control grinding concentration

The grinding concentration will affect the specific gravity of the pulp, the adhesion of the material around the ball and the fluidity of the pulp.If the grinding concentration is appropriate, the adhesive degree of the material around the steel ball is good, the impact and grinding effect of the steel ball on the material is also great, and the steel ball wears away quickly.

In actual production, the grinding concentration can be controlled by controlling the amount of ore feed, water supply, or adjusting the grading function.
 

6. Control the ball mill speed

 

On the premise of reasonable steel ball ratio of ball mill, with the increase of ball mill speed, the steel ball inside the cylinder will be in the state of dropping down to drop pile. When the rotation rate increases to a certain level, the useful power will reach the upper limit. At this time, the grinding effect is better and the wear of ball mill is also reasonable.

The theoretical critical speed of ball mill is generally 78 ~ 85%.Due to the nature of materials and other factors, the ball mill speed should be determined according to the actual situation.

In addition, the quality of steel ball size affect productivity, also influence the ball high and low consumption, which affect the grinding cost, when choosing a steel ball, the ball is not a very hard time, but has its proper hardness value, if only considering the ball consumption, is the higher the hardness of lower consumption, but for mill productivity, within a certain range productivity increases with increasing ball hardness, but when the hardness is over a certain range is harmful to mill productivity, make the mill productivity, and the steel ball is fragile.Second, the steel ball density of ball mill is also a problem that cannot be ignored.

In the process of grinding, there were many factors affecting energy consumption of ball mill ball, and most of the factors is difficult to make quantitative analysis, can only be qualitatively analyzed, to guarantee the quality of reasonable index under the premise to reduce the power consumption of steel ball for ball mill, must to consider from multiple link, and good control of each link, to achieve good technical and economic indexes and product quality indicators.

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The role of jaw crusher in stone production line

Product introduction:https://www.cementepc.net/crusher/Jaw-crusher.html

Jaw crusher plays a very important role in stone production line, it is the main crushing equipment in the stone production line configuration, because after the bulk material must pass a jaw crusher preliminary broken can be according to the requirement of the discharging granularity in the secondary crushing in other crushing equipment, simple stone production line is mainly composed of vibrating feeder, jaw crusher, vibrating screen, belt conveyor, and focus on electronic equipment, to meet different customers processing needs, can be equipped with the cone crusher, dust removal equipment, etc.The role of jaw crusher in stone production line.

Jaw crusher in which can handle the side length of 100 ~ 500 mm below the material, and has the crushing ratio of large, broken material is cubic particles, simple structure, reliable work, simple maintenance, low operating costs and other advantages.In the stone production line, large blocks of stone are sent to the jaw crusher for coarse crushing by the vibrating feeder through the bin, and the coarse crushed stone is sent to the jaw crusher for further crushing by the belt conveyor.The crushed stone is sent by the belt conveyor into the vibrating screen for screening, screening out several different specifications of stone, stone size to meet the requirements of finished products sent by the belt conveyor finished products pile, can meet different specifications of stone requirements of different customers.

Due to the advantages of high efficiency production, low energy consumption and convenient use of jaw crusher, this kind of stone production line has a high degree of automation. In addition to the startup and shutdown of equipment and daily maintenance, the whole production line hardly needs manual operation.Moreover, it has the advantages of high production efficiency, low operating cost, large output and high profit.

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Hydraulic roller crusher fault solution

Product introduction:https://www.lvssn.com/crusher/Roll-crusher.html

With the expansion of mining scale, the demand for sand and stone materials is increasing.The development trend of large hydraulic roll crusher is inevitable.Everyone in the use of hydraulic roll crusher, it is inevitable that some accidents will occur.Hydraulic roller crusher fault solution.
 

1. Hydraulic roller crusher technical parameters

 

(1) feed particle size

As the name implies, the feed size of the hydraulic roller crusher means that the feed mouth can bear the size of the material, the feed size unit is generally used "mm".The feed size of hydraulic roll crusher produced by Jiangsu LVSSN is ≤500mm.
 

(2) discharge particle size

Whether the discharge particle size reaches the standard mainly depends on whether the discharge size of the crushing equipment is within the user's requirements. Under normal circumstances, the discharge particle size of the hydraulic roller crusher is 0-5mm, which can completely meet the user's needs.
 

(3) processing capacity

 

The capacity of hydraulic roller crusher refers to the number of materials broken by the equipment per hour, different types of crushing equipment, the capacity of hydraulic roller crusher is different.For example, the processing capacity of common models is 50-80t per hour.
 

(4) motor power

The motor power is directly proportional to the handling capacity of the crushing equipment. The larger the motor power is, the larger the handling capacity of the roller crusher will be.
 

2. Solution of hydraulic roller crusher's shaft rotation but the roller skin does not rotate

 

(1) the hydraulic roller crusher is very likely to be the universal coupling of the gravel equipment crack or fracture caused by, hydraulic roller crusher, the occurrence of this situation is easy to let the bearing parts squeeze, and then pressure roller skin.To avoid this situation again, we use the roll crusher, to avoid the single face coupling bear too much torque.

(2) hydraulic roller crusher in the use of the process must pay attention to the use of lubricating oil, different parts of the degree of lubrication is not the same.Especially in the long production process, we must pay close attention to the consumption of shaft lubricating oil.

(3) processing technology, different processing machinery in the development of the required materials, low selection standards, heat treatment process is not the same.

In the assembly of the hydraulic roller crusher to have a good assembly habit, or there should be a strict system to ensure the normal assembly to ensure the quality of stability.Work, such as "assembly" hydraulic pressure on the roll crusher power-hungry, staff need to choose the ideal inner hole size of the bearing and the bearing of a match, select ideal clapboard and the corresponding parts of the inner hole size tolerance to cooperate, will be recorded in the fit tolerance of each parts, as the hydraulic profile of roll crusher, for future maintenance and accessories sales and so on all can be used as a reference.

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Replacement method of wearing parts of impact crusher

Product introduction:https://www.cementepc.net/crusher/Impact-crusher.html

Impact crusher is the sand production line and the crushing line in common use of the crushing equipment, known for its product grain type, want to impact crusher long-term stable service for you, do a good job of equipment maintenance is very important.Replacement method of wearing parts of impact crusher.

When replacing wearing parts, open them first and put them on the shelf.Impact crusher adopts screw or hydraulic capping device.When using, first remove the connecting bolts between the racks, then both sides of the two people operate the handle on the flap device at the same time, slowly open the rear upper rack, replace the wearing parts, use the flap device again, repeat the above process, that is, close it and put it on the shelf.
 

In the impact crusher, the plate hammer and the impact plate are the main wearing parts. The following are the replacement and installation methods of the plate hammer and the impact plate:

 

1. Replace the plate hammer

When the plate hammer is worn to a certain extent, it should be adjusted or replaced in time to avoid damage of fasteners and other parts of the impact crusher.

Open the rear shelf with a screw or hydraulic flap.Turn the rotor by hand and transfer the board hammer that needs to be adjusted or replaced to the access door, then secure the rotor with a safety device.Remove the plate hammer positioning parts: first remove the positioning baffle of the impact crusher, loosen the bolt group, and remove the serial Numbers 2 and 3 in turn. Finally, use the holes at both ends of the hammer head to lift out the hammer head, turn it around, and then press the hammer head in turn.

Special attention should be paid to plate hammers of similar weight installed in relative positions to avoid unbalanced operation.Serious vibration will greatly affect the bearing life of impact crusher.The equipment is not working properly.
 

2. Replace the counter plate

(1) after opening the upper frame, remove the nuts and bolts used to fix the impact liner, and replace the impact liner after the impact crusher wears out.If a new counter liner is installed, reverse the above steps.

(2) all adjustment liners should be opened and put on the shelf. All liners are allowed to be interchanged in areas with heavier wear and areas with lighter wear.When a piece of liner is worn out only on one side, it can rotate 90° or 180° and continue to be used. If the material is found to be overstocked on the counter rack and stuck on the counter rack, the washer and bolt pad can be used behind the counter rack lining on the side and the gap can be reduced to avoid this phenomenon.

Correct installation is the premise to ensure efficient production of impact crusher.After the installation is completed, it is necessary to check the impact crusher (whether there is any foreign body and material in the crusher, whether the fastener is firm, etc.) and test (empty load and load test) to ensure normal production can begin.

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Analysis on the advantages of crushing limestone with impact crusher

Product introduction:https://www.cementepc.net/crusher/Impact-crusher.html

Impact crusher is a new type of high efficiency crushing equipment, instead of the traditional old crusher, the use of new general crushing technology, for limestone materials have amazing crushing effect, effectively achieve the new process requirements of more crushing less grinding, more become the majority of users favor a kind of equipment.Analysis on the advantages of crushing limestone with impact crusher:
 

1. Finished products:

Through the improvement of the feed port technology, the impact crusher can improve the height of the crushing chamber, enhance the adaptive hardness of its materials, and effectively reduce the stone powder of limestone materials.The clearance between the counterattack plate and the board hammer is conveniently adjusted, and the discharge particle size is more effectively controlled.

2. Crushed limestone materials:

The equipment itself has the advantage of small size, simple and compact structure, more convenient maintenance, strong machine rigidity, the rotor has a greater rotational inertia force, the impact crusher adopts keyless connection, guarantee the equipment for limestone crushing work, operation is more economical, reliable.

3. Production benefits:

Impact crusher USES impact resistance, wear-resistant high crusher plate hammer, its impact is larger, in addition, has the characteristics of complete broken function, high productivity, reduce the wear rate between the parts, with the middle comprehensive benefit is higher.

4. Energy saving and environmental protection:

When the impact crusher equipment crusher the limestone material, it can carry out one-time on-site crushing of the material, avoiding the intermediate link of the material from the site to be broken again, so as to effectively reduce the production and operation cost, reduce the pollution caused by the re-broken material to the environment, and be more environmentally friendly and energy-saving.

Impact crusher not only crushing capacity, amazing effect, more environmental protection and energy saving, can bring greater production benefits, how do you have the intention to buy impact crusher and we can leave a message, we will answer all your questions

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