The cement industry is increasingly focusing on sustainable production methods, with slag micro powder playing a pivotal role as a supplementary cementitious material. Vertical roller mills (VRMs) have emerged as the most efficient technology for slag grinding, offering superior energy efficiency and product quality compared to traditional ball mills. This article explores the technical advantages and operational principles of VRM systems specifically designed for slag micro powder production in cement plants.
Granulated blast furnace slag presents unique processing challenges due to its high hardness (Bond Work Index 18-23 kWh/t) and abrasive nature. Conventional grinding systems often face:
| Component | Function | Key Feature |
|---|---|---|
| Grinding Table | Material bed formation | Wear-resistant alloy segments |
| Rollers | Compressive grinding | Hydro-pneumatic loading system |
| Separator | Particle classification | Dynamic rotor with adjustable vanes |
| Hot Gas Generator | Drying & material transport | Low-NOx combustion system |
For slag micro powder production requiring D97 ≤ 5μm fineness, our SCM Ultrafine Mill series delivers exceptional performance:
| Model | Capacity (t/h) | Power (kW) | Fineness (mesh) |
|---|---|---|---|
| SCM800 | 0.5-4.5 | 75 | 325-2500 |
| SCM1250 | 2.5-14 | 185 | 325-2500 |
| SCM1680 | 5.0-25 | 315 | 325-2500 |
Key advantages for slag applications:
For larger-scale operations requiring 30-325 mesh products, the LM Vertical Slag Mill series offers:
| Model | Capacity (t/h) | Specific Surface (m²/kg) | Moisture Reduction |
|---|---|---|---|
| LM220N | 20-26 | ≥420 | 15% → ≤1% |
| LM370N | 90-110 | ≥420 | 15% → ≤1% |
VRM systems demonstrate 40-50% lower specific energy consumption versus ball mills through:
The controlled grinding environment in VRMs produces slag powder with:
A 5000t/d cement plant in Vietnam achieved these results after installing our LM220N slag mill:
| Parameter | Before | After |
|---|---|---|
| Power Consumption | 52 kWh/t | 38 kWh/t |
| Production Rate | 18 t/h | 24 t/h |
| Product Fineness | 380 m²/kg | 430 m²/kg |
| Maintenance Interval | 800 hours | 3000 hours |
Modern vertical roller mills represent the optimal solution for slag micro powder production, combining energy efficiency with precise particle size control. Our SCM Ultrafine Mill and LM Vertical Slag Mill series offer cement plants reliable, high-performance grinding solutions that maximize the value of slag while minimizing operational costs. With advanced features like intelligent control systems and wear-resistant designs, these mills ensure consistent product quality with minimal environmental impact.
