Vertical Raw Mill

Vertical Raw Mill
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The vertical raw mill has high grinding efficiency. Due to innovative material-grinding principle, it reduces power consumption by 20-30% as compared with ball mills. The higher the feeding material moisture content, the more energy the machine can save.

The grinding mill has high drying capacity, as it uses the hot waste gas from the cement kiln for material drying. It supports drying and grinding of feeding raw mix with moisture content as high as 15%.

It offers simplified processing flow, so the structure is compact. Our PFRM range of vertical mill combines material crushing, drying, grinding, separating, and conveying functions. Hence, it requires no additional equipment such as dryer, powder separator, and elevator. Thus, the installation space and workshop space of PFRM is only 70%, and 50-60% of that of ball mills, respectively.

Our vertical raw mill features low noise and low dust. As the grinding wheel and the grinding rollers don’t contact with each other directly, the operation noise is 20-25dB lower than that of ball mills. The fully enclosed, negative pressure grinding system ensures no dust and clean working environment.

Due to low wear loss, there is low metallic pollution for ground materials. The metal wear loss is only 5-10g/t.

The grinding rollers supports alternatively use of the two ends, which doubles the Ground cement raw mix come with stable chemical components and uniform particle size distribution, which facilitates cement clinker sintering.

Technical Specifications
ModelPFRM 53.4 PFRM 38.4 PFRM 36.4 PFRM 34.4 PFRM 32.4 PFRM 28.3 PFRM 27.3 PFRM 25.2 PFRM 22.2 PFRM 17.2 PFRM 14.2
Grinding wheel diameter (mm) 5300 3800 3600 3400 3200 2800 2700 2500 2200 1700 1400
Grinding roller quantity 4 4 4 4 4 3 3 2 2 2 2
Installed power (kW) 3600 ~4000 2000 ~2500 1800 ~2240 1600 ~1800 1400 ~1600 800 ~1250 800 ~1000 710 ~900 400 ~500 200 ~250 132 ~155
Powder separator power (kW) 200 132 110 90 90 75 55 45 30 15 11
Max. feed size (mm) ≤100 ≤85 ≤80 ≤70 ≤70 ≤70 ≤65 ≤70 ≤50 ≤40 ≤40
Feed raw mix moisture content ( %) 6 6 6 6 6 6 6 6 6 6 6
Screen residue (Ground material fineness 80µm) (%) 12~14 12~14 12~14 12~14 12~14 12~14 12~14 12~14 12~14 12~14 12~14
Discharging material moisture content (%) 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5
Raw mix grindability index (Wi) 7.5~13 7.5~13 7.5~13 7.5~13 7.5~13 7.5~13 7.5~13 7.5~13 7.5~13 7.5~13 7.5~13
Production capacity (t/h) 330~510 185~280 170 ~260 140 ~210 125 ~190 85 ~130 78 ~120 60 ~90 40 ~65 22 ~33 13 ~20

Related Names
Powder Grinding Mill | Mineral Grinding Machine | Raw Material Processing Plant

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