Vertical Grinding Mill/Vertical Roller Mill Low Investment For
Civil Construction
Comparison between Ball mill and Vertical Mill:
As an industrial raw material, powder is widely used in the cement
industry, building materials industry, metallurgical industry,
chemical industry, power industry, coating industry, rubber
industry, plastic industry, cosmetics industry, etc. The particle
size of conventional industrial powder is 1-10μm, the particle size
of fine powder is 0.1-1μm, and the particle size of ultrafine
powder or nanopowder is 1-100 nm, and the particle size of ball
mill or vertical mill can reach 1-10μm. Each has its own advantages
and disadvantages.
The working principles of the two are different. The grinding
principle of the ball mill is to pulverize the large-particle
materials into small-particle materials through the impact between
the large steel balls, and then grind the small-particle materials
through the relative movement between the small balls.To achieve
the purpose of grinding, the sphericity of the powder produced by
the ball mill is better, and the surface is relatively smooth. The
working principle of the vertical mill is to directly crush and
grind large particles of materials into fine powder by the
squeezing and shearing between the grinding roller and the grinding
disc. The powder produced by the vertical mill is in the form of
flakes under the microscope and has a relatively round sphericity
difference.
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.
