Tips for daily maintenance of ball mills, and specific contents of ball mill maintenance and overhau

2. Preparation before the trial operation of the ball mill.

1. Clean the interior of the workshop and remove all the construction tools.

2. Inspection and cleaning of the ball mill equipment itself

1) Whether there are articles and sundries in the grinding book of the ball mill;

2) Whether there are debris in the inlet and outlet of the ball mill and in the suction pipe;

3) Cleaning of ball mill bearings and outer cylinders of mills;

4) Clean the coupling joint, ball mill mill bearing, reducer, and motor appearance;

5) Blow the inside of the motor with compressed air, and check whether there is any debris inside the motor.

3. The oil pipeline is flushed, generally washed with filtered 40 engine oil and 20 rust inhibitors. First, remove the oil pipe leading to the equipment and seal it with a blind plate at the inlet of the equipment oil circuit. Connect the oil inlet pipe leading to the equipment with the oil pipe and the oil outlet pipe with a temporary pipeline, flush it with a circulating oil pump, and check it on the oil filter net of the oil pipe of the oil tank until there is no debris on the filter network, and then it can be considered that the oil pipe is flushed qualified.

Then, the oil pipe is also connected to the ball mill equipment by rinsing it with a circulating oil pump.

4. Check the tightness of the anchor bolts and lining bolts of the ball mill piece by piece. Check the power supply voltage and control the reliability of the ball mill equipment. The ball mill motor and the reducer, the coupling bolts of the coupling between the reducer and the mill, or the connecting parts are removed, so that each part of the ball mill can rotate independently.

5. Before the test run of the ball mill, the high-pressure oil pump is run first, and the ball mill is lifted up by the high-pressure oil film to form a float to reduce the torque of the ball mill, and then the bearings and lubrication parts of the ball mill are oiled.

6. Check whether the cooling water pipe is blocked, and open the cooling water pipe joint to flush the pipe until the cooling water is clean before the ball mill is put into trial operation.

Overflow Ball Mill Maintenance and Wear Standards:

1. The operation and maintenance personnel of the ball mill should be familiar with the structural performance of the equipment and the name, specification and function of each component.

2. The operator should follow the principle of "four determinations", lubricate according to the requirements of each part marked in the lubrication diagram, and shall not use untreated waste oil to keep the lubrication point clean.

3. During operation, pay attention to check that the temperature of each bearing does not exceed 60, and check whether the bolts of each part are loose, whether there is abnormal sound, whether the water supply is uniform, whether there is slurry leakage in the cylinder, and whether the motor current and voltage are normal. Whether the protective cover of the transmission part is in good condition.

4. Keep the equipment hygienic and clean, except for the running part, the rest of the parts should be handled at any time.

Main wear and tear scrap standards:

1. The wear of the bearing is greater than 1 3 of its thickness.

2. The wear of the pinion surface should not be greater than 30% of the tooth thickness, and the wear of the tooth surface of the large gear ring is greater than 25% of the tooth thickness.

3. The distortion degree of gear ring rim deformation should not be greater than.

4. The outer surface of the hollow shaft should be replaced when grooves, marks or local wear on the inner circular surface cause deformation and cracks of the hollow shaft. **。

Ball mill overhaul cycle: 1 month after repair; Minor repairs 1-3 months; Medium repair 12-24 months; Overhaul 60-120 months.

1. Repair: mainly check the oil quantity, adjust the clearance of each part, strengthen the bolts of each part, replace individual liners or check the wear of the liners, and repair the feeder.

2. Minor repair: Henan Red Star Machine Manufacturing proposes to check the wear of the tooth surface for cleaning and measurement, check the wear of the lining plate, and replace it if necessary.

3. Medium repair: replace some parts of the feed material, replace the small tooth runner and bearing of the ball mill transmission, and dismantle the reducer for inspection. The buried wheel of the large tooth hall can be adjusted and used according to the situation after 3-5 years of operation, and the hollow shaft should be measured after 3-5 years of operation.

4. Overhaul: dismantle inspection and cleaning, measurement, repair or replace ball mill gears, hollow shafts, spherical tiles, transmission shafts, pinions and cylinders according to wear and tear, repair and replace electrical disturbance components, and after the overhaul of electrical equipment, the ball mill must be tested and accepted.

Here's how to perform maintenance and if it feels appropriate, you can do it. Henan Bailing machine ****.

1.Sealing of inlet and outlet materials: air leakage, leakage; The wear and tear of the inlet and outlet air duct (the wear of the cement discharge pulley) and the wear and deformation of the inlet and outlet spiral cylinder.

2.Slippery shoe made of pallet temperature: pallet splint wear and fastening cover shell oil leakage: connecting joint leakage, oil leakage fixing seat bolt inspection.

3.Fastening of cylinder bolts in the rotary part, grinding door and bolt sealing, blockage of the compartment plate, fastening of the bolts of the partition plate, wear and deformation of the partition plate, check the wear of the central screen, and the installation of the partition plate, guard plate and sieve plate should be leveled, the lining plate bolts and bolts are fastened, the lining plate is worn, and the lining plate is pad filling; Flange liner assembly clearance.

4.Transmission part of the main motor bearing temperature: check the large gear ring Harvard bolt main motor anchor bolts:

Check the sealing of the large gear ring cover Main motor connector inspection: check the temperature of the main reducer bearing of the large gear top clearance and side clearance: check the vibration of the anchor bolt main reducer of the auxiliary motor:

Check the anchor bolt fastening of the auxiliary motor connector main reducer: check the anchor bolts of the auxiliary reducer Main reducer connector inspection: check the auxiliary reducer connector Check the flange bolt of the large gear ring:

Check the lubricating oil of the auxiliary reducer.

Ball mill size gear shaft wear, tile seat cooling water jacket cracks, grinding head mouth thread wear, concrete base cracks, anchor bolt loosening, hollow shaft cracks and other faults can be repaired by Fushilan polymer composite materials, compared with the traditional method, with the characteristics of fast repair and good effect, it generally only takes 6 hours to repair, prolonging the service life of the equipment This cement equipment maintenance article has a case introduction, you can refer to the following

1. Add a fine crusher before the mill;

2. Improve the grinding system and improve the grinding efficiency;

3. Add a high-efficiency powder separator.

At present, the mining industry is relatively hot, and there is a relative shortage of skilled workers, and many of them have not undergone long-term formal training, which has virtually caused large economic losses to mining enterprises. In addition, the operation of grinding is a practical experience in production, which many engineers and technicians do not understand very well, and this technical experience cannot be found in various books. To this end, based on the author's many years of experience in production and commissioning guidance and the combination of theory and technology, the grinding operation is elaborated in detail.

As a ball mill operation, the factors that are relatively fixed and do not need to be adjusted frequently are: raw ore hardness, crushing particle size, grid screen hole, ball mill model, steel ball quality, steel ball addition, steel ball size ratio, ball mill speed, classifier speed, classifier impeller spacing, classifier spindle lifting height, classifier blade wear, classifier overflow weir level, classifier lower opening height, classifier lower opening size, classifier upper opening size, classifier upper opening size, classifier upper opening size. This part of the factors is the early development of the design and process.

Of course, many concentrators now have problems with unreasonable design, equipment installation or equipment quality. Let's start with some of these factors. Ball Mill Model Selection:

Different ball mill models can meet different process technical requirements, and this factor must be reasonably selected in the design, see Ball Mill Selection and Calculation for details. The ball mill is not centered according to the assembly, and there are deviations in the meshing of large and small gears. The gear of the reducer in the transmission part of the ball mill has a sand hole, and the equipment is installed according to the load, and it has not run a few shifts, and the gear is worn and other problems.

The following focuses on the important parameters of the daily adjustment of the ball mill, which is also an important content that directly reflects the operation level of the ball mill and the utilization rate of the grinding. Mainly: the size of the feed water of the ball mill, the size of the flush at the discharge port of the ball mill, and the size of the ore feed.

There are several aspects that can be paid attention to the aura of ball mill belly expansion, one is to see whether the ball mill spits out material to the ore mouth, the second is to listen to the sound of the ball mill, if the ball mill is bloated, the sound becomes smaller and muffled, and the third is to look at the ball mill current control cabinet, especially to emphasize that if the ball mill is bloated, its current value becomes smaller, and many operators and engineers think that it is just the opposite, they think that the ball mill belly is because the ball mill is bulging because the amount of ore in the ball mill is larger, and its current value is larger, which is a wrong view. The principle is: the ball mill is swollen because the amount of ore in the ball mill is more, and when the amount of ore in the ball mill is more, the steel ball and ore are running together with the barrel of the ball mill, and the ore particle size of the ball mill discharge mouth becomes coarse, at this time, the work done by the ball mill becomes smaller, and the electric energy becomes smaller when converted into kinetic energy by electric energy, and the electric energy becomes smaller accordingly.

Ball mill is the key equipment for crushing materials after crushing, which is widely used in cement, mining, thermal power, new building materials and other industries, and wear-resistant steel balls are the most important grinding medium in ball mills. As a professional manufacturer of wear-resistant steel balls, Kaiyuan Wear Resistant has an in-depth understanding of the working principle of ball mills and related precautions.

First, the ball mill steel ball ratio problem.

Different ball mill models have different ball volumes. In the run-in process of the ball mill, only 80% of the steel balls are added, because after the ball mill is installed, the large and small teeth of the ball mill need to be meshed, and the processing capacity (ore volume) is also gradually increased, after the ball mill runs normally for two or three days, stop the ball mill to pick up the meshing of the large and small gears, and when everything is normal, open the ball mill manhole cover and add the remaining 20% steel balls for the second time.

2. How to determine the speed of the ball mill.

When other conditions are constant, the movement of the grinding medium in the cylinder depends on the speed of the ball mill. The grinding effect is different depending on the movement state of the medium.

1. When the speed of the ball mill is low, the medium is mainly in the falling motion, the impact effect is small, the grinding effect is mainly grinding, and the ball mill has a low production capacity, which is suitable for fine grinding;

2. When the speed of the ball mill is high, the proportion of the medium throwing motion mode increases, the impact effect is strong, the grinding effect is mainly impact, and the grinding and stripping is secondary, which is conducive to crushing coarse-grained materials, and the ball mill has a high production capacity. Depending on the fill rate of the ball mill, the speed required when the useful power reaches the maximum value is also different. The higher the filling rate, in order to ensure that the innermost ball can also be in the throwing motion, the higher the speed of the ball mill is required to make the useful power reach the maximum value and make the ball mill have the maximum productivity.

3. Judge whether the ball mill is bloated.

1. The ammeter of the main motor of the ball mill indicates that the current is constantly decreasing;

2. The overflow of the classifier begins to "run rough", the amount of sand return is gradually increasing, the overflow concentration increases, and the particle size becomes coarse;

3. There is slurry sprayed outward at the feed end of the ball mill;

4. The sound of the ball mill is dull, the noise becomes smaller, and the impact and falling sound of the steel ball are almost inaudible;

5. There are obvious changes in the flotation foam, the effect of the flotation agent is out of balance, and the mineralization phenomenon is weakened. If such a problem occurs, it is necessary to consider whether it is the ball mill that is bloated and affects the progress of the work.

As the most professional new ball mill manufacturer, we tell you about the maintenance of the ball mill in normal work: to talk about the key points, as the saying goes, minor diseases are not cured, and major diseases are difficult to treat; The maintenance and service life of the ball mill all depend on the operator's dedication to the equipment, when the abnormality is found, it is necessary to find the cause and solve the problem, and the procrastination will only cause the problem to be amplified. The maintenance of the ball mill is to solve the problem when there is a problem, and keep the production relaxed and stress-free.

As one of the necessities of grinding powder, the care of daily work is a must, such as stopping for an hour at work to let the ball mill take a break, and the training of ball mill operators is also essential. Remember, more investigation, more comparison, in order to choose the best, I hope to help you.