Ball mill control

Ball mill output is controlled by the boiler combustion control system. The demand for fuel actuates the primary air flow regulating damper, which varies the primary air entering the ball mill thereby causing a change in fuel throughput to the burners. Control of the ball mill is accomplished in the following manner:

Fuel level control system

The control system operates by adjusting the raw fuel input rate to the ball mill, maintaining a fuel level in the drum. This fuel inventory, which remains constant throughout the load range of the ball mills, is especially advantageous in direct firing applications.

Fuel-air temperature control

This is designed to maintain a constant fuel-air classifier outlet temperature by regulating dampers to proportion hot and cold air admitted to the ball mill.

Seal air control

This operates to maintain a fixed pressure differential between the seal air chambers and the drum to prevent fuel leakage to plant surrounding. The required differential is established y manipulating a seal air damper controlling the air flow to the seals.

Ball Mill Maintenance

Ball mill is an important grinding mill in mineral processing operation. Grinding is energy consuming process. The ball mill needs to be operated and maintained properly. Here are some attentions for ball mill troubleshooting and maintenance.

      Regularly lubricate the main shafts of ball mill, and a thorough cleaning is very necessary during the operation of ball mill. After a month, operators should replace all the lubricating oil.
      When the ball mill is operating, the temperature of main bearing should not exceed 55℃.
      The large and small gears should work smoothly with no abnormal noise. If necessary, operator should adjust the gap between them.
      There should be no abnormal fluctuation in the motor current.
      If something abnormal is found, workers should immediately stop the ball mill, and make a careful check.

Cement Grinding Mill For Sale

The cement mills on a cement plant are usually sized for a clinker consumption considerably greater than the output of the plant's kilns. This is for two reasons:

The mills are sized to cope with peaks in market demand for cement.

Cement milling is the largest user of electric power on a cement plant, and because they can easily be started and stopped, it often pays to operate cement mills only during "off-peak" periods when cheaper power is available.

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