Schematic diagram of a powder grinding production line
Limestone grinding equipment is chosen in four steps: fix the target fineness in mesh, match that band to a mill type, size the model against the required t/h and feed size in mm, then compare lifecycle cost instead of purchase price. Baichy publishes limestone mills from 80 to 2500 mesh and 0.5 to 100 t/h.
What Data Do You Need Before Choosing a Limestone Mill?
Five inputs decide the mill: target fineness, required capacity in t/h, feed moisture in %, powder end use, and site power supply.
Limestone is calcium carbonate (CaCO3) at Mohs hardness 3, so abrasion is low and fineness and moisture decide the mill type.
• Target fineness — a 200 mesh (0.074 mm) filler and a 325 mesh desulfurization powder are different machines.
• Required capacity — the t/h held at the working fineness, not the quoted maximum.
• Feed moisture — above about 5% moisture, plan a drying section or hot-air grinding.
• End use — filler, asphalt plant and desulfurization set different acceptance limits.
• Site power — installed kW and local voltage fix the motor and control cabinet.
How Do You Match a Mill Type to the Target Fineness?
Limestone mill selection starts with the mesh band, then the model. Baichy publishes an MTW trapezium mill for the limestone filler band, a YGM high-pressure mill down to 80 mesh, a vertical roller mill for 250–325 mesh desulfurization powder, and an HGM micro-powder mill to 2500 mesh.
| Equipment Series | Applicable Fineness | Production Capacity Range | Typical Application Materials |
|---|---|---|---|
| HGM Micro Powder Mill | 325–2500 mesh | 0.5–12 T/H | Calcite, calcium carbonate, kaolin |
| YGM Raymond Mill | 80–325 mesh | 1–20 T/H | Gypsum, barite, feldspar |
| High-Pressure Suspension Roller Mill | 80–600 mesh | 2–25 T/H | Ores, slag, refractory materials |
| Vertical Grinding Mill | 150–800 mesh | 5–100 T/H | Cement raw materials, coal powder, non-metallic minerals |
Baichy also publishes the limestone end-use mapping: 40–150 mesh for construction, wall coatings, chemical filling and paper making; 150–200 mesh for low-calcium limestone in asphalt mixing plants; 250–325 mesh for desulfurization powder with CaO more than 50% and CaCO3 more than 90%.
YGM Grinding Mill
MTW Grinding Mill
Vertical Roller Mill
What Are the Published Model Parameters?
MTW trapezium mill host parameters publish 4–12 t/h at MTW110 and 20–35 t/h at MTW175, both at a 1.6–0.038 mm product size; the coarse-end roller table runs from 3R2115 at 0.4–1 t/h and 15 kW to 5R4119 at 2.5–9.5 t/h and 75 kW.
| Model | Grinding Rollers (mm) | Grinding Ring (mm) | Rotational Speed (rpm) | Max Feed (mm) | Product Size (mm) | Capacity (t/h) | Weight (t) |
|---|---|---|---|---|---|---|---|
| MTW110 | Φ360×210 | Φ1100×210 | 120 | <30 | 1.6–0.038 | 4–12 | 18 |
| MTW138 | Φ460×260 | Φ1380×260 | 96 | <35 | 1.6–0.038 | 8–20 | 28.5 |
| MTW175 | Φ520×300 | Φ1750×300 | 75 | <40 | 1.6–0.038 | 20–35 | 46 |
Cells above are reproduced as published; the headings are re-typeset from the source's vertical row labels.
A Raymond mill is a roller-and-ring dry grinding mill published at 80–600 mesh (0.175–0.044 mm) on non-flammable material up to Mohs 7. The YGM high pressure mill is the same roller family with a high-pressure spring added.
What Drives the Cost of a Limestone Grinding Line?
Installed power, wear-part life and the drying requirement drive the operating cost, not the purchase price alone. The same model number quoted at 200 mesh and at 325 mesh describes two different machines.
• Installed power — mill, classifier and blower kW set the electricity bill; a vertical mill publishes 20%–50% lower system power than a ball mill system.
• Wear parts — YGM160 publishes a 1–2 year life for a set of alloy rollers and rings on limestone.
• Drying — a vertical mill takes 10%–20% moisture in one pass with hot air; without it, a separate dryer.
• Contract basis — Baichy states grinding equipment disputes come from the gap between nominal and actual capacity, so the technical agreement should name the fineness behind the t/h figure.
FAQ: Limestone Grinding Equipment Selection
1. Which mill is suitable for grinding limestone?
Limestone at Mohs hardness 3 suits roller mills. Baichy publishes MTW trapezium mills for 40–150 mesh, YGM and Raymond mills across the 80–600 mesh band, vertical roller mills for 250–325 mesh desulfurization powder, and HGM micro-powder mills from 325 to 2500 mesh.
2. What fineness can a limestone grinding mill reach?
Limestone powder fineness runs from 80 to 2500 mesh across the published range. A Raymond mill covers 80–600 mesh (0.175–0.044 mm), the MTW series publishes a 1.6–0.038 mm product, and HGM micro-powder mills reach 325–2500 mesh.
3. How much does a limestone grinding mill cost?
No fixed price is published. The YGM page states price depends on model size, configuration level, material requirements and supplier. Five inputs move a quotation: material properties, feed conditions, finished-product requirement, capacity requirement and site conditions.
4. Why does the same model show different capacities?
Quoted capacity is tied to a fineness basis: Baichy publishes MTW capacity at 200 mesh and states actual output moves with target mesh, feed moisture and impurity level. Name the working fineness in the technical agreement.
5. What feed size and moisture can a limestone grinding mill take?
MTW host parameters publish a maximum feed of under 30 mm to under 40 mm by model, and the MTW guide lists feed moisture of 5% or below. YGM160 publishes a maximum feed of 30 mm or less. Vertical mills handle 10%–20% moisture in one pass.
Baichy Heavy Industry
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