Vertical Roller Mills (VRMs) are widely used in industries like cement, power, mining, and metallurgy for grinding various materials. Here are the common materials processed in VRMs:
1. Cement Industry
– Clinker: The primary material ground with gypsum to produce cement.
– Raw Meal (Raw Mix): Limestone, clay, shale, iron ore, and other additives before kiln processing.
– Blast Furnace Slag (GGBFS): Ground into granulated slag for blended cement.
– Pozzolana/Fly Ash: Supplementary cementitious materials (SCMs).
– Gypsum: Added to clinker to control setting time.
2. Power Plants
– Coal/Petcoke: Ground into fine powder for combustion in boilers.
– Biomass: Some VRMs can grind biomass fuels.
3. Mining & Minerals
– Limestone/Dolomite: Used in cement or as fillers.
– Phosphate Rock: For fertilizer production.
– Iron Ore/Copper Ore: Pre-grinding before beneficiation.
– Bauxite/Alumina: Used in aluminum production.
4. Industrial Minerals
– Barite/Bentonite/Kaolin/Talc/Graphite: Used in paints, ceramics, and chemicals.
Advantages of VRM Grinding:
- Higher energy efficiency than ball mills.
- Compact design & lower footprint.
- Ability to dry, grind, and classify simultaneously.
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