Silicon Carbide (SiC) has become a cornerstone material for industries ranging from aerospace to renewable energy. At Henan Superior Abrasives, our dual-furnace technology—combining the traditional Acheson process with large-scale furnace innovations—ensures unparalleled consistency in SiC production.
Stage 1: Raw Material Preparation & Carbothermal Reduction
The foundation of premium SiC lies in precise raw material engineering.
- Ingredient Selection
- Silica (SiO₂): ≥99.5% purity, sourced from quartzite deposits
- Carbon Sources: Petroleum coke/anthracite coal with <0.1% ash content
- Additives: Sodium chloride (NaCl) for impurity removal
- Furnace Reactions
- Dual-Furnace Advantages
- Acheson Furnaces: Batch processing for specialty grades
- Continuous Megafurnaces: 20% higher energy efficiency vs. conventional designs
Stage 2: Crushing & Precision Classification
Post-cooling, SiC crude undergoes rigorous size reduction and purification.
Crushing Workflow
| Stage | Equipment | Output Range | Key Control Metrics |
|---|---|---|---|
| Primary Crushing | Jaw Crushers | 50–100 mm | <3% fines generation |
| Secondary Milling | Vertical Shaft Impactors | 5–50 mm | 95% particle aspect ratio >0.7 |
| Micronization | Jet Mills + Classifiers | 0.5–50 μm | D50 tolerance ±0.5 μm |
Purification Techniques
- Acid Leaching: HCl/HF mixture removes metallic impurities (Fe <100 ppm)
- Magnetic Separation: 15,000 Gauss rare-earth magnets extract ferrous contaminants
- Ultrasonic Cleaning: 40 kHz waves eliminate submicron particulates
Stage 3: Quality Assurance & Certification
Every batch undergoes multi-stage validation:
- Particle Standards Compliance
- ANSI B74.12 (North America)
- FEPA 42-1:2016 (Europe)
- JIS R6001 (Japan)
- Advanced Characterization
- XRD Analysis: Verifies α/β-SiC phase ratio
- XRF Spectroscopy: Confirms <0.05% trace element content
- Laser Diffraction: Measures particle distribution (Malvern Mastersizer)
- Industry-Specific Testing
- Abrasives: Friability (Bond Index)
- Refractories: Thermal shock resistance (ASTM C1100)
- Semiconductor: Resistivity (>10⁵ Ω·cm)
Sustainable Manufacturing Initiatives
Henan Superior Abrasives leads in eco-conscious SiC production:
- Waste Heat Recovery: 72% of furnace exhaust energy repurposed for preheating
- Closed-Loop Recycling: 95% of process byproducts reused in adjacent product lines
- Carbon Neutrality Roadmap: Third-party audited Scope 1/2 emissions tracking
Why Choose Henan Superior Abrasives?
- 20+ Years Expertise: Custom SiC solutions from grits to nanoscale powders
- End-to-End Control: Vertical integration from raw materials to finished products
- R&D Partnerships: Co-developing next-gen SiC for EV power electronics and 5G RF devices
Explore Our Capabilities
[Download SiC Technical Dossier] | [Schedule a Plant Tour] | [Request free sample]
- Email: sales@superior-abrasives.com
- WhatsApp: +86-18638638803
