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Vertical Mill

Vertical roller mill are suitable for huge capacity producing, widely used in grinding non-flammable and non-explosive materials under 9.3(the Moh's hardness), such as quartz, feldspar, calcite, talcum, barite, fluorite, iron ore, copper ore quartz, etc

Application of vertical roller mill:

Vertical roller mill are suitable for huge capacity producing, widely used in grinding non-flammable and non-explosive materials under 9.3(the Moh's hardness), such as quartz, feldspar, calcite, talcum, barite, fluorite, iron ore, copper ore quartz, especially for slag, cement clinker, zircon sand, fly ash and carborundum, coal, etc.

Working Principle of Vertical roller mill:

The grinding disc is driving by motor through reducer. The material falls to grinding disc from the feed opening. The materials are driven to the edge of disc by the centrifugal force and crushed into fine powders by rollers. Then, the hot air from the nozzle take the fine powder to high effiency classsifer.The qualified powder are taken by the air to the powder collector to be collected, while the unqualified powder are sent back for regrinding. 

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Advantages of vertical roller mill:

1. High grinding efficiency: save 20~30% power consumption compared with the ball mill. With the increasing of moisture content, it can save more and more electricity.

2. Strong drying capacity: dry and grind raw materials with moisture content as much as 15%.

3. Mutifunction: crushing, drying, grinding, separating and conveying.

4. Low noises and little dust: no direct contact between the grinding rollers and grinding disc, so metallic impact is avoided and its noises is 20~25 decibels lower. Totally closed negative pressure operation has employed by this vertical grinding mill, so there is no dust during the operation.

5. Low wear rate and little metallic pollution: its metal wear is only 5~10g/t.

The technical data of vertical roller mill:

Model HRM53 HRM38 HRM36 HRM34 HRM32 HRM28 HRM27 HRM25 HRM22 HRM17
Grinding disc diameter (mm) 5300 3800 3600 3400 3200 2800 2700 2500 2200 1700
Amount of grinding rods 4 4 4 4 4 3 3 2 2 2
Installation power(kW) 3600~4000 2000~2500 1800~2240 1600~1800 1400~1600 800~1250 800~1000 710~900 400~500 200~250
Power of powder separator(kW) 200 132 110 90 90 75 55 45 30 15
Max feeding size (mm) ≤100 ≤85 ≤80 ≤70 ≤70 ≤70 ≤65 ≤70 ≤50 ≤40
Feeding moisture (%) 6 6 6 6 6 6 6 6 6 6
Moisture of final products (%) 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5
Grindability index of raw materials (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
Productivity (t/h) 330~510 185~280 170~260 140~210 125~190 85~130 78~120 60~90 40~65 22~33
 
Model HRM1300M HRM1400M HRM1500M HRM1700M HRM1900M
Grinding disc diameter mm Φ1300 Φ1400 Φ1500 Φ1700 Φ1900
Output T/H 10-15 12-17 16-22 20-28 26-35
Feeding size mm 0-40 0-40 0-45 0-50 0-55
Feeding moisture  % <15 <15 <15 <15 <15
Product fineness  % 8-12 8-12 8-12 8-12 8-12
Product moisture  % <1 <1 <1 <1 <1
Power of main motor  Kw 200 200 280 315 400
Feeding ar temperature ℃ <450 <450 <450 <450 <450
Discharge air temperature ℃ 80-95 80-95 80-95 80-95 80-95
Air discharging volume  M3/H ~40000 ~45000 65000 80000 100000
Weight   T 45 52 75 96 100

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