20,000 T/Y Calcite Grinding Production Line in Hunan

Project Overview

A new materials company in Hunan Province established a new 20,000-ton-per-year high-purity calcite powder production line. After extensive investigation and technical evaluation, the company ultimately selected the technical solution of two CRRM1280 Raymond Mills from Cronus Machinery arranged in parallel. The project successfully processes calcite raw material into high-quality 325 mesh (D90) powder with a total system output of up to 10 t/h. The system operates stably and meets environmental standards.

Project Details

Calcite Raw Material → Storage Hopper → Electromagnetic Vibrating Feeder → Raymond Mill

Calcite raw material stored in the storage hopper is continuously, uniformly, and quantitatively fed into two CRRM1280 Raymond Mills by electromagnetic vibrating feeders for grinding. The ground calcite powder enters the classifier along with the air flow. Under the action of the classifier impeller, a closed-circuit cycle is formed. Calcite coarse powder that does not meet the 325 mesh fineness requirement is separated and falls back into the grinding chamber for re-grinding.

Airslide Conveyor → Cyclone Collector → Pulse Jet Dust Collector → Bucket Elevator → Packing Machine

Subsequently, the qualified calcite fine powder is conveyed along with the air flow through the airslide conveyor via pneumatic transport to the cyclone collector. The process is fully enclosed, preventing any dust leakage. The cyclone collector utilizes centrifugal force to separate and collect the majority of the calcite fine powder. The pulse jet dust collector recovers calcite ultrafine powder and treats the remaining airborne dust. The collected finished calcite powder is then conveyed by a bucket elevator to the packing machine for final packaging.

Project Advantages

Efficient and Flexible: The parallel configuration of two CRRM1280 Raymond Mills offers flexible system output adjustment, easily meeting the annual production target of 20,000 tons.

Economical and Reliable: Core grinding components are made of high-wear-resistant materials for long service life. The parallel design facilitates maintenance on a single unit without affecting overall continuous production.

Environmentally Friendly and Clean: The entire process, from grinding and conveying to collection and packaging, adopts a fully enclosed design. The production site remains clean, and exhaust emissions are well below national standards.

Uniform Particle Size: The finished calcite powder exhibits stable fineness (325 mesh, D90) with a uniform particle size distribution, fully meeting the quality requirements for fillers in downstream high-end applications.