Lower Investment Vertical Roller Mill / Vertical Grinding Mill
Energy Saved
Operation of the Mill and its Description:
After the mill is started in the starting sequence, the material is
fed at the set value, the hydraulic system is operated to drop the
grinding roller, the oil pump motor of the hydraulic station is
turned on, the working pressure of the hydraulic system is adjusted
to balance the system, and the separator rotor speed should be
adjusted to make The fineness of the product meets the
requirements.(The specific method is to first adjust the separator
to a higher speed, and adjust the rotor speed according to the
product sampling analysis results to obtain the required fineness).
During operation, the temperature of the gas entering and exiting
the mill should be adjusted according to the moisture content of
the material. The greater the moisture content of the material, the
higher the temperature of the gas entering and exiting the mill,
but the highest temperature of the milling gas should not exceed
300°C.
Note: 1. If the thin oil station runs continuously for 5 minutes
without abnormal conditions, the mill can be started in the order
of driving;
2.After the roller is lifted to the highest position, the main
motor of the vertical mill starts, and after running together for 5
minutes without abnormal conditions, the feed command of the
vertical mill system starts, and the material reaches the mill at
time t1 (time t1 is determined by the site). Start the roll down
action, 40s after the roll down action starts, start the roll
pressure control program, that is, press the set pressure to
automatically execute the pressure and automatically execute the
pressure and pressure operation;
Start of the Pulverized Coal Vertical Mill System:
Startup: Lubrication system (Thin oil station) motor → Separator
motor (frequency conversion motor) → Roller lifting → Main motor →
Feeding and falling roller → Hydraulic system motor (pressurizing).
Normal Shutdown Process of Pulverized Coal Vertical Mill System:
Shutdown: Stop material command start----Feeding operation
stop----Start roll lifting operation----Vertical mill main motor
stop----Oil station operation stop----Hydraulic station stop
Emergency Shutdown:
Mill stop----Stop material command start----Feeding operation
stop----Start roll lifting operation----Hydraulic station stop
Parameter of Cement Vertical Mill:
| Model | Grinding plate(mm) | output(t/h) | output(×10kt/a) | Main motor power(kW) |
| diameter | Pitch | blast furnace slag | cement | Raw meal | blast furnace slag | cement | Raw meal |
| ZKRM08.2 | 1200 | 800 | 1.5~2 | 3~4 | 6~8 | 1.5 | 3 | 5.5 | 55 |
| ZKRM11.2 | 1500 | 1100 | 3~4 | 5~6 | 10~12 | 3 | 4.5 | 9 | 110 |
| ZKRM13.2 | 1700 | 1300 | 8~9 | 11~13 | 20~22 | 6 | 9.5 | 17 | 185 |
| ZKRM15.2 | 1900 | 1500 | 9~10 | 14~16 | 26~34 | 8 | 12 | 24 | 250 |
| ZKRM17.2 | 2100 | 1700 | 12~14 | 20~23 | 40~50 | 10 | 17 | 36 | 355 |
| ZKRM19.2 | 2300 | 1900 | 15~17 | 24~26 | 50~60 | 13 | 20 | 43.5 | 450 |
| ZKRM20.2 | 2400 | 2000 | 18~20 | 27~30 | 60~75 | 15 | 22.5 | 55 | 560 |
| ZKRM22.3 | 2600 | 2200 | 23~25 | 40~50 | 85~110 | 20 | 35.5 | 77 | 710 |
Remarks: the basic standard for vertical mill is as follow:
(1)Power consumption:slag≤25kWh/t,cement≤18kWh/t,raw meal≤9kWh/t；
(2)Moisture content:slag≤15%,cement≤3%,raw meal≤7%；
(3)Ffinished product fineness: specific surface area of slag
4200~4500cm²/g,specific surface area of cement 3300~380 cm²/g,raw
meal fineness-80μmR 12~15%；
(4)Moisture content of refined powder:slag 0.5~1.0%,cement
0.5~1.0%,raw meal 0.5~1.0%；
(5)The specific installed capacity and parameters can be adjusted
properly according to actual material nature.
(6)The above parameters are applicable for granular blast furnace
slag, cement and raw meal and the model selection is determined by
material property.
