Vertical Raw Mill Compact Layout System Equipment With Light Weight
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.
The part of exhaust gas from cyclone filter came back into air
inlet of vertical mill, and other will be discharged into
atmosphere through kiln system filter, fan and chimney.
The heat air source of raw material vertical mill is from high
temperature fan and preheater exhaust gas.
Vertical Grinding Mill Advantages:
1. The material is mainly broken and pulverized by the weight of
the roller and the pressure of the pressurizing device. During the
grinding process, 1 the material is always subjected to the
pressure of the grinding roller while the material between the
grinding roller and the millstone is subjected to the effect of
multi-directional stress, thereby improving the grinding capacity
and grinding efficiency.
2. As the material get fully contact with the hot gas after enter
the mill, and then suspended in the hot gas after grinding, which
can fully 2 s ed ing exchange heat energy and dry the material
while grinding.
3. The grinding pressure of roller is provided by the hydraulic
system, which is passed to the grinding roller by the pressure
device and the rocker device and then applied to the material.
Owing to the pressure regulation of the hydraulic system, it can
change the grinding pressure to meet the requirements of grinding
materials with different hardness.
4. For avoiding the violent vibrati situation caused by the direct
contact of the roller and disc when the machine in tion, there
should be 4 ing opera certain gap between the grinding roller and
disc. A position limiting device is designed not only to adjusting
the gap size between them, but to observing the material thickness
under roller any time, thereby ensuring the mill with safety and
economic operation.
5. Roller sheath and liner adopt high hardness alloy wear-resistant
materials, with less abrasion and long service life. 5 disc
6. Under the function of accessory hydraulic cylinder, the roller
can be removed outside of mill for inspection and repair easily.
7. There has device around the grinding disc to prevent disc base
wearing, adjust the air speed of air ring and the material
thickness, to guarantee 7 the vertical mill' capacity and operation
economical.
8. The separator is 8 composed of converter motor, gearbox, rotor,
shell and so on. The motor drive rotator through gearbox and
getting different fineness product by adjusting the speed of motor.
9. The lubrication oil station provides oil to lubricating system
of main gearbox and generation the circle lubrication to guarantee
the main gearbox operation normally.
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.
