Choosing a limestone grinding mill is a two-filter decision, and the order matters. Match the mill type to limestone's properties first; then size the model by the output you need at your target fineness.
Detailed images of limestone powder grinding
Step 1: Match the mill type to the limestone
Limestone is soft (Mohs 3-4) and low-abrasion, so the question is not whether it will grind but which type fits your fineness band:
• 80-425 mesh, 0.5-20 t/h - pendulum/Raymond (5R) or trapezium (MTW) mill; lowest CAPEX, fineness adjustable in minutes.
• 325-2500 mesh - three-ring ultrafine mill (HGM), for coating-grade powder.
• 30 t/h and up with drying - vertical roller mill; lowest power per ton at scale.
• 80-200 mesh bulk filler - ball mill for very high tonnage, at higher kWh per ton.
Then pass three gates: feed size 30-35 mm max (pre-crush), moisture 5% max (dryer or dry blending in the rainy season), and hard impurities such as quartz at Mohs 7 - screen them out, or wear-part cost spikes.
MTW Trapezoidal European Version Grinding
HGM Micro-powder Mill
Vertical roller crusher
Step 2: Size the model by capacity at your target fineness
Sizing a limestone grinding mill starts with required output = annual tonnage / operating days / working hours, plus a 15-25% margin.
Then apply the fineness derating: grinding to 325 mesh cuts capacity 25-35% against a 200-mesh basis.
| Mill type | Fineness | Capacity (200-mesh basis) | Best fit |
|---|---|---|---|
| Raymond 5R | 80-425 mesh | 0.5-12 t/h | Small plant, one grade |
| MTW trapezium | 80-400 mesh | 3-20 t/h | Medium plant, multi-grade |
| HGM ultrafine | 325-2500 mesh | 0.5-8 t/h (325 mesh basis) | Coating-grade powder |
| Vertical roller mill | 80-325 mesh | 30 t/h and up | Large line with drying |
Why this order works
Type first eliminates wrong-technology quotes before price is discussed. The derating applied up front keeps rated and delivered capacity in agreement. And the fixed brief it produces - material, feed size, moisture, mesh, tons per hour, voltage - makes every quote directly comparable.
Structural diagram of YGM grinding equipment
FAQ
Q1. Can one mill make both 200-mesh and 325-mesh powder?
Yes, with a VFD turbine classifier - a trapezium or 5R mill switches grades without changing parts.
Q2. I need 100 tons per day. Which model?
Twenty hours a day is 5 t/h, so an MTW138-class machine on a 200-mesh basis; selling mainly 325-mesh means one class up.
Q3. My limestone runs 6-8% moisture in the rainy season. Will it grind?
Not directly - above 5% it clogs the classifier and air duct. Add a rotary dryer ahead of the mill, or blend in dry material.
Q4. How much does fineness affect output?
Roughly 25-35% lower capacity at 325 mesh than at 200 mesh on the same machine, so always specify the mesh you sell at.
Q5. What should I put in an RFQ?
Material and Mohs hardness, feed size, moisture, target mesh with D97 or sieve residue, tons per hour, and site voltage and phase.
Baichy Heavy Industry
Baichy Heavy Industry is a high-tech mining equipment company integrating R&D, manufacturing, sales, and after-sales service. Focusing on crushing, grinding, and mineral processing equipment, we provide professional solutions to our customers. We are ISO9001:2015 、certified, and our products include mobile crushing palnts, crawler crushing plant, construction waste crushing plants, jaw crushers, sand making machines, cone crushers, fine crushers, grinding mills, ball mills, etc., all with reliable performance to meet diverse project needs.
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