Vertical mill operating procedures

1. Before the machine opreparation
(1)First of all, check whether the normal operation of the rotating parts of the mill and the lubrication point has been injected with the right amount of oil (as described above).
(2)Followed by adjusting the limit device so that the gap between the disc and roller 5 to 10 mm (should be rotate disc to check).
(3)Finally ensure the accumulator is inflated, which pressure should be have 60 to 70% of the main cylinder working pressure. Keep the hydraulic system in working condition.

2. Start grinding mill machine order:
Start: open the oil pump (oil pressure 0.25Mpa time 5 ~ 10 minutes) → open the hydraulic station oil pump → open the separator to the working speed → open the fan → open the reversing valve → lift roller (height of about 10-30mm) → open the main motor → cutting (first open star unloader, after opening the belt scale) → drop roller pressure, the order of shutdown and boot sequence is just the opposite.

3. The operation of the mill and its description
After the mill starts, according to the starting sequence, the material is fed with the set value, the hydraulic system is operated to drop the roller, the oil pump motor of the hydraulic station is to adjust working pressure to make the system reach equilibrium. Meanwhile, adjust the rotor speed of the separator to meet the products fitness requirements (the specific method is that first separator is transferred to a higher speed, according to product sampling and analysis results to adjust the rotor speed, get the required fineness). At present, the classifier motor is transferred to 25HZ, the rotor speed is 215r / min, and the fineness of coal powder is up to more than 90% of the 200 mesh. If the classifier motor is transferred to the 30HZ rotor speed of 260r / min, the fineness of coal powder reaches 200 mesh more than 94% pass rate; separator motor in the 25HZ-30HZ adjustment between the fineness of coal can meet the requirements.

In the above operation, attention should be paid to the main motor current changes, the main reducer bearings and roller bearing temperature changes. During mill operate normal, the main reducer bearing temperature should be below 70 ℃, roller bearing temperature should be less 100℃. At the same time should also be carefully observed mill abnormal sound or phenomenon, if so, you should be promptly ruled out, when necessary, should be shut down after processing, then press the boot sequence to restart the mill.
Operation process should also be based on the moisture content of materials, adjust the temperature of the gas out of the mill, the greater the moisture of materials, and out of the grinding gas temperature should be higher, but into the grinding gas temperature shall not exceed 300 ℃.