ball milling process

Vertical mills are generally consists of a cylinder body, a lining board, to feeder, a discharger, a hollow shaft, bearings, transmission device and lubrication system composition. When the ball mill cylinder around the horizontal axis to a certain rotation speed, medium and raw materials in the barrel is arranged in the role of the centrifugal force and friction force, with the cylinder reaches a certain height, when their own gravity is greater than the centrifugal force, from the inner wall of the barrel body projectile falling or roll, the impact crushing ore. At the same time, in the process of milling motor rolling, sliding motion between the grinding medium also produces abrasive materials.

The ball mill for fine grinding operations, but also often used for coarse grinding. Ball mill are widely used in various industrial sectors (in addition to avoid iron material), which can be used for processing industry, metallurgy, chemical industry, building materials, silicate industry, refractory, electric power, cement and other industrial sectors to grinding hardness ore, coal or other material to be ground.

How to calculate the load of ball mill?

How many balls with the main motor current has a close relationship. Have experience in the operation of the ball mill grinding miners, always pay attention to observe the changes of the main current of the ball mill.

In ball mill for ore amount did not change, and in good condition, generally speaking, the higher current, ball mill ball charge more; on the contrary, it is becoming less and less.

What is the daily operation rules of ball mill

1, drive before the examination, good mechanical and electrical parts, check whether the connecting bolts loosening; every lubricant is normal or not, whether it is normal for reliable transmission, protective devices intact, electrical instrumentation is sensitive, motor carbon brush good contact.

2, barring a week, the rotation of inspection equipment or obstructions around there, and eliminate. Start around the station were closed.

3, after check, press the start button to start the motor, pay attention to current changes. Mill no more than two consecutive start, the first and the second segment for more than 5 minutes, if the third starter must electrician, fitter with inspections, before starting. Not the same with other equipment, to start staggered to avoid tripping.

4, mill normal operation, the vertical mill to strictly in accordance with the provisions of the water supply to the mine, add the ball to prohibit overload, idle time is not more than 15 minutes, so as not to bash liner.

5, running check cylinder leakage of slurry, careful observation of the current, voltage, to material, water supply is normal, check every half an hour a motor and spindle temperature not more than 60 DEG C, found problems in a timely manner.

6, running attention should be paid to observe the hollow shaft, oil ring rotating with oil, hollow shaft temperature is normal, such as the discovery of hollow shaft fever, close to burning kwh, should immediately take mandatory cooling measures, may not stop immediately, so as to avoid the "axis hold." At the same time pay attention to the site to check lubricating oil, gas temperature, timing.

7, mill parking should stop before feeding, concentrate in the standby after processing, stop water supply. Press the stop button and pull down the gates.

8, in the absence of notice blackout, the first to pull down the switch, press the stop button to stop mining, water supply.

9, vertical mill parking, sanitation and cleaning equipment to ensure civilized production.