The MTW Trapezium Grinding Mill is a high-efficiency, energy-saving powder mill designed for mining, building materials, and chemical applications. With strong adaptability across material types, it delivers stable, reliable performance for both non-metallic mineral powder processing and industrial solid-waste recycling.
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The MTW Trapezium Grinding Mill is a medium-to-large industrial mill built on European grinding technology. It is mainly used to grind non-metallic minerals—such as limestone, calcite, barite, and talc—and serves building materials, chemical, and metallurgical industries.
Key advantages over the traditional Raymond mill include higher grinding efficiency (30–50% more), lower energy consumption (20–30% less), longer wear life, and easier maintenance. The curved trapezium roller, combined with a high-efficiency turbine classifier, delivers finished powder from 80 to 400 mesh with uniform particle distribution.
Grinding production line
MTW Trapezium Grinding Mill
Grinding equipment parts
Raymond grinding roller
- Medium-hardness non-metallic minerals: limestone, calcite, barite, talc, bentonite, gypsum (Mohs hardness ≤ 6)
- Feed moisture below 6%; higher humidity requires pre-drying
- Fineness range 80–400 mesh, ideal for building materials and chemical powder
| Model | Capacity (t/h) | Main motor (kW) | Best for |
|---|---|---|---|
| MTW110 | 3–10 | 55 | Small to medium lines, moderate output |
| MTW138 | 6–20 | 90 | Medium-sized production lines |
| MTW175 | 10–35 | 200 | Large lines, high material volume |
| MTW215 | 20–50 | 280 | Large-scale, continuous 24-hour operation |
- You need medium to large-scale, continuous powder production (3–50 t/h per mill)
- Your target fineness is 80–400 mesh with consistent particle quality
- You require energy-efficient, CE-compliant operation with low dust and noise
Capacity varies with material hardness, feed size, and target fineness. Contact Baichy for a customized configuration based on your material and output requirements.
Trapezium roller: 30–50% higher efficiency than Raymond mill; turbine classifier, 80–400 mesh.
Main energy use down 20–30%; bevel-gear drive + thin-oil lubrication; wear parts last 800–1,200 hrs.
PLC monitors current & temperature live, auto-adjusting feed and grinding force for stable operation.
Pulse dust collector: <30 mg/m³ emissions, CE & GB 16297 certified; noise <75 dB (vs. 85 dB+).
Large feed material is first crushed by a jaw crusher to the required particle size, then lifted by an elevator into a storage hopper. A vibrating feeder then delivers it uniformly and continuously into the main grinding chamber.
Inside the chamber, the material is squeezed between the grinding rollers and ring. Each roller orbits the central axis while spinning on its own axis under centrifugal force. This dual motion strongly impacts and grinds the material into fine powder.
| Model | MTW110 | MTW138 | MTW175 | MTW215 | |
|---|---|---|---|---|---|
| Roller Size (L×H)(mm) | 360×210 | 460×260 | 520×295 | 640×340 | |
| Grind Ring Inner Dia.(mm) | Φ1100×210 | Φ1380×260 | Φ1760×295 | Φ2150×340 | |
| Main Shaft Speed(r/min) | 120 | 96 | 75 | 65 | |
| Max. Feeding Size(mm) | 30 | 35 | 40 | 50 | |
| Output Size(mm) | 1.6-0.038 | 1.6-0.038 | 1.6-0.038 | 1.6-0.045 | |
| Capacity(t/h) | 3-10 | 6-20 | 10-35 | 20-50 | |
| Power(kw) | Main Grinder | 55 | 90 | 200 | 280 |
| Blower | 55 | 132 | 200 | 315 | |
| Powder Classifier | 7.5 | 18.5 | 37 | 45 | |
| Overall Dimension(mm) | 8425×7933×8642 | 10920×9470×10227 | 12195×9555×9916 | 13922×9810×13226 | |
- Power supply — Check voltage stability; it should meet equipment requirements (typically 380V/50Hz).
- Motor fault — Test motor insulation; look for overload or burnout.
- Tripped protection — Reset thermal relay / circuit breaker and restart.
- Feed blockage — Clear residual material in the grinding chamber before startup.
- Worn grinding roller / ring — Inspect wear and replace in time (check every 500–800 hours).
- Classifier speed off — Adjust classifier speed to match target fineness.
- Insufficient airflow — Check the blower and pipeline for leaks; adjust damper opening.
- Uneven feed — Stabilize feed rate; avoid over-feeding or intermittent feeding.
- Unstable foundation — Reinforce the foundation and level the machine.
- Loose bolts — Retighten bolts on rollers, bearing housings, and other key parts.
- Damaged bearings — Stop the mill, inspect lubrication and wear, and replace if needed.
- Material too hard — Confirm material is within the recommended Mohs hardness (≤ 6).
- Poor lubrication — Check oil quality and level; clean bearings and refill with high-temperature grease.
- Incorrect bearing fit — Recalibrate bearing clearance.
- Overload running — Reduce feed rate to avoid prolonged overload.
- Worn classifier blades — Replace blades or adjust blade angle.
- Classifier failure — Check classifier motor and drive.
- Air duct blockage — Clean accumulated powder in the pipeline to restore airflow.
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