High-pressure grinding roll (HPGR) technology for cement pre-grinding and finish grinding. Achieve 25-30% energy savings and significantly increase ball mill throughput.
The cement roller press (also called HPGR - High Pressure Grinding Roll) is a breakthrough grinding technology that uses inter-particle compression to crush material between two counter-rotating rollers under extremely high pressure (150-250 MPa). Unlike ball mills that rely on impact and attrition, the roller press crushes material through particle-on-particle breakage, which is fundamentally more energy-efficient.
LIMING roller presses are used in two primary configurations: as a pre-grinder before a ball mill (combined grinding system), or as a finish grinding machine producing final cement product. In pre-grinding mode, the roller press increases downstream ball mill throughput by 50-100% while reducing total specific energy consumption by 25-30%. In finish grinding mode, it can replace the ball mill entirely with even greater energy savings.
| Quick Specifications | |
|---|---|
| Feed Size | ≤65 mm |
| Capacity | 950-1,050 t/h |
| Roller Diameter | 1,000-2,000 mm |
| Roller Width | 400-1,600 mm |
| Grinding Pressure | 150-250 MPa |
| Motor Power | 2×250 to 2×2,800 kW |
| Roll Surface | Hard-faced or stud-lined |
| Application | Pre-grinding / finish grinding |
Inter-particle comminution is inherently more efficient than ball mill impact grinding. Combined systems reduce total energy from 41 kWh/t to 28-30 kWh/t.
Pre-ground material from the roller press significantly increases downstream ball mill capacity. Existing ball mill circuits can nearly double production without major expansion.
Roller press grinding produces narrower particle size distribution with fewer over-ground fines. Cement exhibits better strength development and reduced water demand.
Advanced hard-facing and stud-lined roll surfaces achieve 8,000-20,000 hours between reconditioning. Lower wear cost per tonne compared to ball mill grinding media.
Significantly smaller footprint than an equivalent ball mill. Easier to retrofit into existing cement plants for capacity upgrades with limited available space.
Can operate in pre-grinding, hybrid, semi-finish, or finish grinding modes. Adaptable to existing circuits without major modifications to the downstream equipment.
Optimize your grinding circuit with the right roller press configuration
Fresh feed passes through the roller press first, where it is pre-ground and compacted into flakes. The de-agglomerated material then enters a ball mill for final grinding. This configuration increases ball mill throughput by 50-100% and reduces total energy consumption by 25-30%. Best for upgrading existing ball mill circuits.
Part of the roller press product is classified and sent directly to the finished product, bypassing the ball mill entirely. Only the classifier coarse fraction goes to the ball mill. This further reduces ball mill load and energy consumption while increasing total system output.
The roller press operates as the sole grinding machine, with a V-separator and dynamic classifier producing final cement product. This configuration eliminates the ball mill entirely, achieving the maximum energy savings (35-40% vs. ball mill-only). Best suited for new grinding stations.
| Model | Roller Dia (mm) | Roller Width (mm) | Feed Size (mm) | Capacity (t/h) | Motor (kW) | Pressure (MPa) |
|---|---|---|---|---|---|---|
| RP-10/4 | 1000 | 400 | ≤50 | 50-80 | 2×250 | 150-200 |
| RP-12/5 | 1200 | 500 | ≤55 | 80-130 | 2×400 | 150-200 |
| RP-14/6 | 1400 | 600 | ≤60 | 130-220 | 2×630 | 150-220 |
| RP-14/8 | 1400 | 800 | ≤60 | 180-300 | 2×800 | 150-220 |
| RP-16/10 | 1600 | 1000 | ≤65 | 280-480 | 2×1120 | 160-240 |
| RP-17/11 | 1700 | 1100 | ≤65 | 360-580 | 2×1400 | 160-240 |
| RP-18/12 | 1800 | 1200 | ≤65 | 500-720 | 2×1800 | 170-250 |
| RP-20/14 | 2000 | 1400 | ≤65 | 720-950 | 2×2240 | 170-250 |
| RP-20/16 | 2000 | 1600 | ≤65 | 850-1,050 | 2×2800 | 170-250 |