A 130-ton cement grinding mill refers to a ball mill or vertical roller mill (VRM) designed to grind clinker, gypsum, and other additives into 130 metric tons of cement per hour (or another specified time frame). Here’s a detailed breakdown of its key aspects:
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1. Types of Cement Grinding Mills
– Ball Mill: Traditional, robust design with steel balls for grinding. Suitable for all cement types but less energy-efficient.
– Vertical Roller Mill (VRM): Modern, energy-efficient, with higher throughput and lower power consumption. Dominates newer installations.
– Roller Press + Ball Mill (Hybrid): Used for high-efficiency grinding with pre-crushing.
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2. Key Specifications
– Capacity: ~130 tons/hour (output depends on fineness, typically 3000–4000 Blaine).
– Power Consumption:
– Ball Mill: ~30–40 kWh/ton
– VRM: ~20–30 kWh/ton
– Feed Material: Clinker (+ gypsum, slag, fly ash, limestone).
– Fineness: Adjustable (e.g., 3200–3800 cm²/g Blaine for OPC).
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3. Components
– Grinding Chamber: Balls/rollers + table (for VRM).
– Separator: Dynamic or static classifier to control particle size.
– Drive System: Gearbox/motor (500–3000 kW, depending on design).
– Dust Collection: Baghouse/ESP for emissions control.
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4. Process Flow
1. Clinker + additives fed into the mill.
2. Ground material is classified; coarse particles are recycled.
3. Fine cement is transported to silos.
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5. Manufacturers & Models
– FLSmidth (OK™ Mill, Ball Mill)
– LOESCHE (LM series VRM)
– Polysius (Quadropol VRM)
– Sinoma, CNBM (Chinese suppliers)
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6. Energy Efficiency Tips
– Use VRMs for lower power consumption.
– Optimize separator settings.
– Add grinding aids (e.g., TEA) to improve throughput.
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7. Cost Estimate
– New mill: $5–15 million (varies by technology/size).
– Retrofit/upgrade: Lower cost