CHAENG will make detailed introduction for vertical mill and including process, at the end of this part is CHAENG mechanical engineers attention and solutions to vertical mill during the process.

1. The vertical mill five factors during operation:

1) Stabilize material bed

2) control the grinding pressure

3) reasonable temperature for grinding material entrance

4) control the reasonable speed of wind and speed

5) control the slag supper fineness surface area

2. The vertical mill large vibration reasons:

1) Material layer is too thick or too thin, finxed the large material or hard material into the mill

2) The mill material is too much, the pressure difference is big, the vibration caused by material layer thickness, the feeding quantity is reduced

3) less material, small pressure, increasing feeding volume, improving the election machine speed, reducing the amount of ventilation

 3. The solution for vertical mill large vibration

1) Closed the fan before open it, after open the fan and then openswitch

2) When start the vertical coal mill main machine, HZ not less than 10HZ, or the wind will glimpse

3) Soft start: starting current is too high, which play an buffer role

4) The reducer lubricating station open 10 minutes before starting the main motor

5) The reducer lubricating station picture mainly notice 12 high-pressures, if there are nine or less than two adjacent conditions will not jump, by the low-pressure pump, the oil hit the high-pressure pump, then hit on the slow down gear

6) Reduce the high-pressure pump oil pressure is limit 0.5bar

7) If there is no material on the belt, feeding system will automatically stop

8) The general anti-pressure plus/minus 2-3bar.