Intermittent ball mill product advantages

Product introduction:https://www.cementepc.net/grinding/Intermittent-ball-mill.html

Intermittent ball mill is a grinding equipment, and continuous grinding ball mill is different, intermittent ball mill is one-time charge, and grinding equipment.With stop and speed adjustment function, safe work, easy operation.Intermittent ball mill product advantages.
 

1. Intermittent ball mill function introduction

(1) intermittent ball mill feed convenient, fighters feed mouth, one-time feed more.

(2) grinding time design, numerical control display, cumulative timing control function, simple operation.

(3) CNC speed adjustment, according to the intermittent ball mill charging, self-adjustment speed, different models of intermittent ball mill have a certain speed requirements, according to the actual production of a reasonable choice of speed.

(4) with a direct transmission structure, the helical gear reducer is driven by an electric motor. The output hollow shaft of the reducer is directly covered on the drive shaft of the grinding ball tank, and equipped with a starting impact cushion of the reducer.It has the characteristics of large transmission torque, high mechanical efficiency and smooth starting, and avoids the trouble caused by frequent adjustment of transmission belt.
 

2. Intermittent ball mill product advantages

(1) the intermittent ball mill can be produced not only by the wet method but also by the dry and wet method.

(2) the intermittent ball mill can also be pulverized and dried at the same time.

(3) the intermittent ball mill also has a lot of large equipment different models, to meet the intermittent ball mill efficiency and cost of comprehensive consideration.

If you want to know more about the functions and parameters of the intermittent ball mill, you can leave a message with us.

The page source:https://www.cementepc.net/productknowledge/Intermittent-ball-mill-product-advantages.html

How much do you know about the adjustment and operation of vertical mill limiter?

Product introduction:https://www.cementepc.net/grinding/LVRM-Vertical-Mill.html

Vertical mill is a set of drying, grinding, powder selection and conveying in one of the powder equipment, because of its small area and favored by users.However, many people complained that after the equipment was used for a period of time, it did not operate correctly, which affected the production and directly affected the economic benefits.How much do you know about the adjustment and operation of vertical mill limiter?

1. Operation rules of vertical mill

(1) wear good labor insurance products.

(2) maintenance of the vertical mill requires two people to go together, keep in touch with the central control at all times, and leave special personnel outside the vertical mill for safety monitoring.

(3) low pressure lighting must be used before entering the vertical mill.

(4) before entering the vertical mill, cut off the power supply of the main motor of the vertical mill, the feeding equipment of the exhaust fan and the powder separator, and drive the field control box to the "maintenance" position.

(5) when replacing the lining plate and parts of grinding roller, pay attention to prevent collision and injury, and take safety protection measures.

(6) when working at height, the operator should first ensure that the tools are in good order and fasten the safety belt.

(7) when the inspection of vertical mill must be carried out during the operation of the large kiln, safety precautions should be taken, close contact should be maintained with the central control, and special persons should be arranged to take charge of safety work. At the same time, the high-temperature fan at the end of the kiln should be increased to extract air, the hot windshield at the entrance of the mill should be closed and power off, and the negative pressure of the system should be ensured to be stable.

(8) confirm that the grinding body has been fully cooled, and verify the depth and temperature of ash accumulation in the vertical mill. If the grinding body is overheated, there is no exhaust air, and ash accumulation is too much, it is strictly prohibited to enter the mill. At the same time, it is necessary to pay attention to whether there is material accumulation in the feeding slide, so as to avoid slipping and injuring people.

(9) complete the procedures for power failure in accordance with relevant regulations.
 

2. How to adjust the limit of vertical mill

 

The adjustment method is:

Make the grinding roller directly contact with the grinding disc, then turn the limit bolt to make it contact with the elastic head.At this time, lift the grinding roller with a pressure device, and turn the limit bolt in the direction of the elastic head for about two turns again (make the distance between the grinding roller and the grinding disc about 5mm). Finally, tighten the upper nut of the limit bolt under the condition of keeping the limit bolt still, to prevent the limit bolt from loosening when the vertical mill is running.The limit device should be adjusted according to the above method.After the vertical mill runs for a period of time, due to the wear of roller sleeve and lining plate, the limit device should be adjusted appropriately.

The page source:https://www.cementepc.net/Industry/How-much-do-you-know-about-the-adjustment-and-operation-of-vertical-mill-limiter.html

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.

The page source:https://www.lvssn.com/Product/How-to-reduce-ball-abrasion-of-ball-mill.html