Micro Powder Mill

How a Micro Powder Mill Produces a Classified Fine Powder

A micro powder mill combines size reduction with air classification in a closed grinding circuit. The mill breaks the feed into fine particles, airflow carries those particles to a classifier, and the classifier returns oversized material for another pass. Qualified powder moves to the collection system instead of remaining in the grinding zone.

This separation step controls the finished powder more directly than grinding time alone. Classifier speed, airflow, feed rate, and grinding pressure or roller action work together, so a change made to improve fineness can also change throughput and power demand.

The complete line normally connects four functions:

1. Feed preparation: A crusher reduces oversized feed, and conveying equipment delivers a controlled flow to the mill.
2. Grinding: HGM rollers press material against multiple grinding rings; CLUM rollers compress a material bed on a rotating grinding table.
3. Classification: Fine particles pass through the classifier while coarse particles return to the grinding zone.
4. Collection: A collector separates finished powder from the air stream, and a bag filter handles residual dust before air leaves the system.

Define the Powder Target Before Comparing Capacity

Mesh or a single micron value does not fully describe an industrial powder. A useful target states the measurement basis and the required particle-size distribution, such as D97 at a specified micron value or the percentage of particles below 2 μm. That distribution affects grinding load, classifier settings, usable output, and the powder's behavior in the final application.

Capacity must be compared at the same powder target. A mill can produce more tons per hour at a coarser setting than at an ultrafine setting, and different minerals respond differently to the same equipment. Published ranges help identify a candidate series; a trial measures how the sample responds on the test equipment and provides evidence for production-scale output estimates and configuration selection.

Feed hardness, moisture, top size, and abrasiveness determine how much grinding work the mill must perform and which wear surfaces are appropriate. The target distribution and test method determine how aggressively the classifier must separate fine powder. Required output is meaningful only when it is attached to those feed and product conditions, while color, particle shape, and contamination limits can change the acceptable grinding route even when two mills reach the same nominal mesh.

Clirik Micro Powder Mill Options

HGM ring-roller grinding and air classification are arranged as a closed circuit for ultrafine powder production.

Мельница HGM для ультратонкого измельчения

The HGM uses multiple roller-and-ring grinding layers with an air classifier to produce fine and ultrafine powder from brittle, nonflammable and nonexplosive materials. Eight listed models cover different grinding-ring diameters, classifier arrangements, fineness bands, and calcium-carbonate reference outputs.

• Models listedHGM80, HGM100L-II, HGM100P, HGM100L-H, HGM125L, HGM125L-H, HGM1680L, HGM1680L-H
• Максимальный размер загружаемого материала≤20 mm (≤0.79 in)
• Published page-level fineness range150–3000 mesh (5–100 μm); available ranges differ by model
• Material conditionsMohs hardness ≤6, moisture ≤6%, brittle, nonflammable, and nonexplosive
• Typical mineralsCalcium carbonate, calcite, limestone, marble, dolomite, gypsum, kaolin, bentonite, talc, mica, barite, and graphite
• Published capacity examplesHGM80: 0.5–5.5 metric t/h; HGM100L-II: 1–10 metric t/h; HGM100P: 1.2–11 metric t/h; HGM1680L: 6–26 metric t/h
• Capacity conditionsThe official table bases these values on calcium carbonate plant feedback and assigns a different fineness band to each model; output for another mineral or powder target requires testing and model selection

Size an HGM SystemView HGM Mill Details

CLUM integrates vertical roller grinding, classification, conveying, and powder collection for ultrafine dry mineral processing.

Ультрамелкая вертикальная вальцовая мельница CLUM

The CLUM combines vertical roller grinding with multiple classifiers for large-scale ultrafine dry processing of nonmetallic minerals. Grinding takes place in a material bed on the table, while the classifier system controls the fine fraction. Its model table reports calcite output against the required percentage below 2 μm, showing how a finer distribution reduces throughput.

• Models listedCLUM1425, CLUM1632, CLUM1736
• Максимальный размер загружаемого материала<10 mm (<0.39 in)
• Published page-level fineness range400–3000 mesh
• Feed moisture in the model table<3%
• Typical mineralsCalcite, marble, limestone, dolomite, barite, talc, kaolin, wollastonite, gypsum, feldspar, and pyrophyllite
• Calcite output at 30% below 2 μmCLUM1425: 9–12 metric t/h; CLUM1632: 12–16 metric t/h; CLUM1736: 14–18 metric t/h
• Calcite output at 45% below 2 μmCLUM1425: 5.5–7.5 metric t/h; CLUM1632: 7–9 metric t/h; CLUM1736: 10–12 metric t/h
• Capacity conditionsThe official table is based on calcite, with particle size measured by a Malvern Mastersizer 3000 laser diffraction analyzer; CLUM1425 is listed at 3–4 metric t/h when 60% is below 2 μm

Size a CLUM SystemView CLUM Mill Details

HGM or CLUM: Choose by Grinding Duty

HGM and CLUM both use closed-circuit grinding and classification, but they apply force differently. HGM repeatedly presses particles between rollers and multiple rings. CLUM compresses a material bed between rollers and a rotating table, then uses multiple classifiers to manage the fine fraction.

Choose the series from the required powder distribution and tested output, then choose the model. Start with HGM when its 20 mm feed limit, brittle-material envelope, and a model-specific fineness band fit the duty. Start with CLUM when the requirement is expressed as a controlled sub-2 μm fraction and one of the listed calcite reference outputs is close to the required rate. Testing the actual mineral is necessary before transferring either reference output to a different feed.

Match Powder Properties to the End Use

The downstream process determines which particle-size distribution is useful. Mineral powder used in coatings or pigments may prioritize dispersion, color, and a tightly controlled coarse fraction. Paper, plastics, rubber, PVC, inks, cables, chemicals, and building materials can place different limits on flow, surface area, particle shape, whiteness, and metal pickup.

State the application together with the nominal mesh or micron target. Two powders with the same headline size can behave differently when their coarse tail or sub-2 μm fraction changes, so the acceptance specification should use the property that predicts performance in the final product.

Turn a Powder Requirement into a Mill Configuration

Mill sizing begins with a representative sample and a measurable powder target. Clirik's material-testing process combines material analysis with a grinding and classification trial, then uses the results to select the mill, classifier, collection system, and operating settings.

1. Record the trial evidence. The test directly records the sample, machine settings, recovered powder, and measured particle-size distribution. An instrumented pilot run can also record throughput and electrical load for that machine, material, and setting.
2. Translate the result into a production design. Engineers use the trial behavior, required continuous output, and application limits to select a model and auxiliary equipment. Projected line capacity and installed power are design values for that specified configuration until the production line is verified under agreed operating conditions.
3. Define the complete line. Crushing, feeding, conveying, classification, collection, dust handling, controls, and packing are matched to the selected mill, then checked against the site's space, foundation, electrical supply, elevation, ambient conditions, and equipment interfaces.

Engineering Support from Layout to Startup

Clirik can develop the grinding line around the selected mill rather than supplying the mill as an isolated machine. The engineering scope can include process design, plant-layout optimization, equipment preparation, installation and commissioning guidance, and operator training; the proposal defines which site-construction work remains with the buyer or local contractor.

During startup, the team checks mechanical and electrical installation, runs the line without load, introduces material under controlled conditions, and tunes feed, airflow, classifier, and grinding settings toward the agreed powder target. Remote guidance and on-site service are available for commissioning and troubleshooting, while training covers operation, routine inspection, maintenance, and process adjustment.