Stable And Reliable Performance Vertical Raw Mill Easy And Safe To
Operate
Vertical Raw Mill Introduction:
The vertical mill is mainly used for grinding raw meal, clinker,
granular blast furnace slag, iron ore, limestone, coal powder, coke
powder, coal gangue, fly ash, volcanic ash, gypsum, calcite,
pyrophyllite, quartz, clay, sandstone, bauxite, silica fume,
calcined rice shell and other processing industry related to metal
and non-metal mine.
Comparison Between Ball Mill and Vertical Mill:
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.
Vertical Raw Mill Working Principle:
The raw material from dosing station after weighing, transported
into inlet of vertical mill by belt conveyor, then fed into rotary
air lock of vertical mill with outer recycle materials, after the
grinding, drying, separating, the crude material comes back
grinding disc for grinding again, the qualified product will be
brought into cyclone filter through separator, the product
collected by cyclone filter and powder from bag filter at the kiln
tail comes into raw meal homogenizing silo by air chute, bucket
elevator and so on.
Parameter of Cement Vertical Mill:
| specification | capacity (t/h) |
speed (r/min)
| Grinding media (t) | motor | reducer | weight(t) |
| model | power (kW) | model | speed ratio |
| Φ1.2×4.5 | 1.7 | 30.3 | 5 | YR250M-6 | 55 | ZD30-8 | 4.481 | 13.1 |
| Φ1.5×5.7 | 4.5 | 26.34 | 11 | JR127-8 | 130 | ZD40-7 | 4 | 25 |
| Φ1.83×7 | 11 | 24.5 | 20 | JR138-8 | 245 | ZD60-8 | 4.5 | 37.2 |
| Φ2.2×7.5 | 16-22 | 21.4 | 32 | JR158-8 | 380 | ZD70-9 | 5 | 53.6 |
| Φ2.4×13 | 35-38 | 19.4 | 69 | YR800-8 | 800 | JDX800/MBY800 | 6.33 | 78 |
| Φ2.6×13 | 50-55 | 19.5 | 83 | YR1000-8/1180 | 1000 | JDX800/MBY800 | 4.5 | |
| Φ2.8×10 | 40-48 | 19.7 | 70 | YR800-8/1180 | 800 | D110A | 37.5 | |
| Φ3.0×12 | 55-58 | 18 | 100 | YR1250-8/1430 | 1250 | JS110-A | 41.1 | |
| Φ3.2×10 | 55 | 17.6 | 98 | YR1000-8/1180 | 1000 | JS110 | 41.5 | |
| Φ3.5×10 | 73 | 16.8 | 118 | YR1250-8 | 1250 | JS110-A | | 153.7(without motor) |
| 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.
