Sandreck‘s ultrafine grinding mill is designed to precisely process powders ranging from medium to ultrafine (300–3000 mesh). Using centrifugal rolling and layered pulverization, the equipment handles everything from coarse crushing to ultrafine powder production. It meets the rigorous particle-size, purity, and consistency standards required by high-end sectors such as photovoltaics, semiconductors, and silicon carbide manufacturing.

This ultrafine grinding mill is a highly efficient, energy-saving powder-processing machine. It is primarily used to ultrafine grind materials such as non-metallic minerals, barite, talc, gypsum, petroleum coke, silica, brucite, aluminum hydroxide, titanium dioxide, wollastonite, kaolin, bentonite, rare earth elements, metallic silicon, silicon powder, and silicon carbide. It delivers outstanding performance in producing ultrafine powders in the 300–3000 mesh range.

The equipment replaces the complex grinding and classification processes of traditional jet mills and ball mills, significantly reducing production costs and improving product fineness.

Structure of the Ultrafine Grinding Mill

Ultrafine Grinding Mill Working Principle

During the operation of the ultrafine grinding mill, the main motor drives the rotation of the main shaft and turntable via a speed reducer. The turntable uses pin shafts to drive dozens of grinding rollers to rotate and roll within the grinding ring. Driven by centrifugal force, the material spreads outward and falls into the grinding chamber, where the rollers subject it to impact, rolling, and grinding. The material undergoes multi-stage crushing and repeated grinding to become fine powder.

As a high-pressure fan continuously draws air out of the unit, the crushed material is carried by the incoming airflow into the classifier. A high-speed rotating impeller sorts the material. Oversized particles fall back for regrinding, while qualified material travels with the airflow into the cyclone collector. The powder settles and is discharged through the bottom discharge valve as the finished product.

A small amount of fine dust enters the dust collector with the airflow and adheres to the filter bags. Pulse valves control a momentary blast of high-pressure air from inside the bags. The sudden shaking causes the adhering dust to fall off. A conveyor at the bottom collects the material from both sources and transports it for final packaging. The filtered, clean air is then exhausted through the silencer outlet.

Advantages of Ultrafine Grinding Mill

Concentrated Particle Size Distribution: The ultrafine grinding mill combines material-bed grinding with high-precision turbine classification, effectively minimizing coarse particles and over-grinding to achieve a narrow, concentrated particle size distribution.
Ultrafine Classification: It consistently produces ultrafine powder ranging from 300 to 3000 mesh, with precise control over fineness (e.g., D97 < 5 μm; >70% of particles < 2 μm).
Precision Classification: A secondary classification system is available. The ultrafine grinding mill not only produces superior-quality ultrafine powder with a highly concentrated particle-size distribution but can also produce two fineness grades simultaneously.
High Integration: The ultrafine grinding machine integrates crushing, grinding, classification, and drying processes. Drying and grinding occur simultaneously, and energy consumption is about 60% lower than traditional ball mill systems.
Low Noise and Eco-friendly: The grinding rollers do not directly contact the grinding table. This results in minimal wear and low noise levels, reducing iron contamination and ensuring powder purity and whiteness.

Ultrafine Grinding Mill Applications

Ultrafine grinding mills are widely used in industries such as chemicals, construction materials, mining, electric power, pharmaceuticals, and new materials. They enable processing powders at the micron or even nano scale, improving product quality and production efficiency.

These Ultra-fine grinding mills are primarily used to finely process non-metallic minerals, metal oxides, and certain organic materials. Typical materials include calcite, kaolin, talc, barite, gypsum, dolomite, bentonite, mica, graphite, titanium dioxide, silicon powder, silicon carbide, and rare-earth materials. The equipment can process brittle materials with a Mohs hardness up to 7 (some models can handle up to 9) and a moisture content below 6%, making it suitable for pharmaceutical, food-grade, and eco-friendly materials.

Technical Parameters of Ultrafine Grinding Mill

Note: The Mohs hardness of the materials to be ground cannot be above 5.