Grind 1000mesh Limestone Powder with CLIRIK HGM Grinding Mill

Step 1 – Quarry-to-Silo Logistics

Limestone blocks are extracted, washed, and pre-screened at the quarry. A covered truck fleet delivers the rock to the plant’s covered stockyard, minimizing moisture pick-up and dust release.

Step 2 – Precision Dosing & Deaeration

A loss-in-weight feeder draws the rock into a vertical roller dryer, lowering residual surface moisture to <0.5 %. Simultaneously, an inline magnetic grate removes any ferrous debris.

Step 3 – HGM Ultrafine Milling Circuit

The dried material enters the HGM mill via an air-tight rotary airlock. Inside, a planetary-style roller assembly orbits a stationary race, generating intense centrifugal stresses that fracture limestone crystals into sub-micron platelets. Chilled air (18 °C) is injected to keep the mill temperature below 45 °C, preserving crystal morphology.

Step 4 – High-Efficiency Classification

An air-classifier wheel with ceramic blades spins at variable speeds (up to 4,000 rpm). Particles above 1000 mesh are rejected and dropped back onto the grinding track, while those meeting the target fineness are entrained in the airstream.

Step 5 – Surface Coating (Optional)

For plastics or paint applications, a dry coating module injects 0.8 wt % stearic acid into the powder stream. The turbulent airflow ensures uniform encapsulation, boosting dispersibility.