Introduction to the Silicon Carbide (SiC) Grinding Mill

Silicon carbide has extremely high hardness (Mohs hardness 9.2–9.5) and strong wear resistance, and the finished silicon carbide powder has strict purity requirements. Ordinary grinding rollers and rings lack sufficient wear resistance, leading to high wear rates and metal contamination that affects purity. To overcome the challenges of silicon carbide processing, Kenex Mining Machinery, drawing on over 40 years of powder processing experience, has developed the KX Silicon Carbide Grinding Mill based on the Raymond mill. The core grinding components are made of specially selected high-wear-resistant materials such as high-chromium alloy, wear-resistant ceramic, and cemented carbide, breaking through the hardness limit (≤7) of traditional Raymond mills. Combined with a high-intensity magnetic iron remover, it enables large-scale production of high-purity silicon carbide powder.

Features and Advantages of the Silicon Carbide Grinding Mill

• Wear-Resistant & Anti-Contamination: Grinding components such as rollers and rings are made of specially selected high-wear-resistant materials. The inner walls of the duct system are lined with ceramic liners, providing extremely strong wear resistance. A high-intensity magnetic iron remover is also used to eliminate contamination at the source.
• High Efficiency & Stability: Equipped with high-power main unit and classifier motors, delivering 20–50% higher performance than traditional Raymond mills, ensuring efficient and stable operation when processing high-hardness silicon carbide.
• Precise & Controllable: The fineness of the finished silicon carbide powder is flexibly adjustable within the range of 80–400 mesh, meeting the requirements of different applications for silicon carbide powder.
• Cost-Effective: Silicon carbide is a third-generation semiconductor material with high added value. For the physical vapor transport (PVT) method of growing SiC single crystals, the SiC powder is generally required to be 100–200 mesh. In this range, the silicon carbide grinding mill offers better cost-effectiveness compared to other grinding equipment such as jet mills.

Wear-Resistant Materials for the Silicon Carbide Grinding Mill

Process Flow of the Silicon Carbide Grinding Mill

Silicon Carbide → Crusher → Vibrating Screen → High-Intensity Magnetic Iron Remover → SiC Grinding Mill → Cyclone Collector → Pulse Jet Bag Filter → Finished Product Packaging

Crushing & Impurity Removal

The silicon carbide raw material is first crushed by a crusher to ≤30 mm, then screened by a vibrating screen. After screening, it passes through a high-intensity magnetic iron remover for magnetic separation to remove impurities, protecting downstream equipment and grinding components, and ensuring that the finished silicon carbide powder meets purity requirements.

Grinding & Classification

The silicon carbide material after iron removal is fed by a bucket elevator into a storage hopper, and then sent by an electromagnetic vibrating feeder into the GK Silicon Carbide Grinding Mill for grinding and crushing. By adjusting the classifier speed, the finished product fineness is precisely controlled. Unqualified coarse silicon carbide powder is returned for regrinding, while qualified fine silicon carbide powder enters the collection system, forming a closed‑circuit cycle, achieving efficient processing of high‑purity silicon carbide powder from 80 to 400 mesh.

Dust Collection & Removal

A double‑cyclone collector and a pulse jet bag filter are used. The cyclone collector separates and collects the majority of fine silicon carbide powder, while the pulse jet bag filter recovers ultrafine silicon carbide powder and simultaneously treats the dust. The total recovery rate of finished powder is ≥99.9%, and exhaust emission is ≤10 mg/m³.

Technical Parameters of the Silicon Carbide Grinding Mill

GK Silicon Carbide Grinding Mill Specification Table

Note: The above data are for reference only. Actual parameters vary depending on the raw material. Please contact us for a professional customized solution.

Frequently Asked Questions about the Silicon Carbide Grinding Mill

How to choose the right silicon carbide grinding mill?

• 80–400 mesh: Recommend the KX Silicon Carbide Grinding Mill upgraded by Guilin Mining Machinery. In this range, jet mills have low single‑unit output, high energy consumption, and poor cost‑effectiveness.
• Above 400 mesh: Recommend a jet mill. It effectively avoids metal contamination and produces a concentrated particle size distribution, making it the preferred equipment for producing high‑purity ultrafine silicon carbide powder.

Is the highest configuration of wear-resistant materials necessary for the silicon carbide grinding mill?

Silicon carbide has extremely high hardness. The highest configuration of wear-resistant materials — especially wear-resistant ceramic — is recommended. Although the initial investment is higher, it significantly extends the service life of wear parts, ensures stable production of high‑quality silicon carbide powder, and provides a high long‑term return on investment.

Can the silicon carbide grinding mill grind other materials?

The silicon carbide grinding mill is a specialized equipment designed specifically for the characteristics of silicon carbide. The wear-resistant materials and iron removal equipment used are relatively expensive. Using it for other materials would not be cost‑effective.

If the grinding components of the silicon carbide grinding mill require frequent replacement, why is it still suitable for processing silicon carbide?

Silicon carbide has high hardness. Even though the silicon carbide grinding mill uses high‑wear‑resistant materials, the frequency of replacing grinding components is still higher than when a Raymond mill processes ordinary materials. However, silicon carbide is a third‑generation semiconductor material with high market value, wide application areas, and a value tens or even hundreds of times that of ordinary quartz. The economic value generated by the silicon carbide powder far exceeds the operating and maintenance costs of the grinding components.