The HGM mill specializes in processing non-metallic minerals (e.g., calcite, kaolin) with Mohs hardness ≤6. Utilizing advanced multi-roller rolling + dynamic classification technology, it delivers ultrafine powders from 325 to 2500 mesh (D97≤5μm optional), meeting stringent demands in chemical, building materials, and other industries.
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HGM micro powder mill is a high-efficiency grinding equipment that uses high-pressure spring boosting technology. It is mainly used to process non-flammable, explosive, and brittle materials with Mohs hardness ≤ 6 and crush them into micron-level (5-45μm) fine powder. Its core principle is to achieve fineness control through high-pressure rolling and shearing between the grinding roller and the grinding ring, combined with a grading system, and finally obtain ultra-fine powder with high uniformity.
• Ultra-fine processing capacity (80-2500 mesh, some models can reach 3000 mesh).
• High efficiency and energy saving (motor power 37-132kW, processing capacity 0.2-20 t/h).
• Dry production, no pollution, suitable for environmental protection requirements.
Applicable materials: limestone, calcite, bentonite, barite, talc, feldspar, dolomite and other 100+ minerals.
Micro powder grinding production line
HGM Micro-powder Grinding Mill
Micro powder grinding feed port
Finished product display
Core components: main machine (grinding roller, grinding ring, classifier), dust removal system, fan, feeder, pulse powder collector.
Crushing: The material enters the storage bin after being pre-crushed by the hammer crusher.
Grinding: The centrifugal force drives the grinding roller to crush the material, and the three-layer cycle is crushed to a micron level.
Classification: air flow sorting, coarse powder is returned to the mill, and fine powder is discharged through the cyclone collector.
Three-ring/four-ring grinding roller design improves grinding efficiency; variable frequency classifier, one-button adjustment of finished product fineness (quick replacement of classification wheel in 30-60 minutes).
Fineness range 80–2500 mesh — covering everything from building fillers to high-precision materials such as lithium battery graphite.
Three-ring layered rolling design; unit power consumption 50–80 kW·h per ton.
Capacity up to 20 t/h, supporting 24-hour continuous operation.
Fully enclosed dry process with pulse dust collection: no wastewater, noise ≤85 dB.
99% finished-product conversion rate; residual material is recycled as building material.
Hydraulic adaptive system: real-time pressure monitoring with automatic overload protection.
High-chromium alloy grinding roller and ring last over 8,000 hours; a set is replaced in about 2 hours.
The main motor drives the grinding rollers at high speed. Centrifugal force presses the material into the gap between the rollers and the grinding ring, where it is crushed in three layers:
First layer — rolling: 3–4 hydraulic grinding rollers crush the material to millimetre size under high pressure.
Second and third layers — repeated rolling: material falls layer by layer and is repeatedly rolled, bringing the final fineness to 5–45 μm (80–2500 mesh).
Dynamic gap adjustment: the hydraulic system adjusts the roller-to-ring gap in real time, adapting to materials of different hardness and preventing overload.
A high-pressure fan feeds the powder-laden airflow into the turbine classifier:
• Accurate classification: the high-speed classifying wheel (3000–6000 r/min) generates centrifugal force, so coarse particles return to the grinding zone while fine powder rises with the airflow.
• Flexible mesh switching: classifier speed is set by frequency converter, or the classifying wheel is replaced in about 30 minutes, switching the finished product across 80–2500 mesh.
• Efficient dust collection: the cyclone collector captures about 90% of the fine powder; the remaining dust passes through pulse dust removal before discharge, with dust concentration below 20 mg/m³.
| Model | Average Diameter(mm) | Ringing Roller/ Roller Ring NO |
Input Size of Main Frame(mm) |
Finished Product Size | Capacity(t/h) | Motor Power(kw) | Overall Dimension L×W×H(m) |
||||||
| Ringing Roller(pcs) |
Roller Ring NO(pcs) |
Micron | Mesh | Main Grinder | Powder Separator |
Draft Fan | Feeder | Discharge Valve |
|||||
| HGM80 | 800 | 21 | 3 | ≤ 10 | 5-47 | 3250-325 | 0.5-6 | 75 | 22 | 45 | 0.06 | 1.1 | 8.6×4.1×6 |
| HGM1028 | 1000 | 27 | 3 | ≤ 15 | 1.2-10.2 | 110 | 30 | 75 | 0.15 | 2.2 | 14.5×3.6×7.5 | ||
| HGM1036 | 1000 | 36 | 4 | ≤ 20 | 1.2-11.5 | 132 | 37 | 110 | 0.15 | 3 | 14.3×4.2×7.5 | ||
| HGM1250 | 1250 | 32-44 | 4 | ≤ 20 | 2.5-20.5 | 185 | 75 | 132 | 0.15 | 3 | 19.2×4.4×8.5 | ||
The HGM mill handles non-metallic minerals with Mohs hardness ≤6 that are non-flammable and non-explosive — limestone, calcite, bentonite, barite, talc, feldspar and dolomite among 100+ mineral types. Maximum feed size is 10–20 mm depending on model. Materials that are harder or high in moisture should be pre-crushed or dried first, because both sharply reduce grinding efficiency.
Fineness runs from 80 to 2500 mesh (about 5–45 μm). You change it in two ways: adjust the variable-frequency classifier speed — higher speed produces finer powder — or swap the classifying wheel, which takes roughly 30–60 minutes. Because one machine covers the full range, you avoid buying separate equipment for each target fineness.
Four models cover 0.5–20.5 t/h: HGM80 (0.5–6 t/h, 75 kW), HGM1028 (1.2–10.2 t/h, 110 kW), HGM1036 (1.2–11.5 t/h, 132 kW) and HGM1250 (2.5–20.5 t/h, 185 kW). Select by the tonnage you need at your target mesh, then confirm main mill power. Actual output varies with material hardness, feed size and fineness, so final sizing should be confirmed against a process design.
There is no fixed list price. Cost depends on the model, main mill power (75–185 kW), classifier and dust-collection configuration, and whether you need a complete line — crusher, elevator, feeder, collector and control cabinet — or the mill alone. Send your material, target mesh and required t/h, and Baichy returns a configuration plan with quotation, typically within 24 hours.
The high-chromium alloy grinding roller and grinding ring are rated for over 8,000 hours, and a set can be replaced in about 2 hours. Daily checks cover lubrication, fasteners and dust cleaning; wear parts are inspected monthly; the motor and transmission get a full overhaul and oil change every six months. Keeping feed dry and free of metal debris is the single biggest factor in reaching rated service life.
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