Siliciumcarbid (Sic) has become a cornerstone material for industries ranging from aerospace to renewable energy. Hos 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: Forberedelse af råvarer & Carbothermal Reduction​

The foundation of premium SiC lies in precise raw material engineering.

1. ,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
2. ,Furnace Reactions,
   • ,Core Reaction:
     SiO2 + 3C → SiC (α/β-phase) + 2CO↑
   • ,Process Parameters:
     • Temperature gradient: 2,500°C ±15°C
     • CO emission control: <50 ppm (EPA-compliant scrubbers)
   • ,Crystal Growth:
     a-SiC (sekskantet) dominates at >2,100°C; β-SiC (kubik) forms under rapid cooling
3. ,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,

,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:

1. ,Particle Standards Compliance,
   • ANSI B74.12 (Nordamerika)
   • Foder 42-1:2016 (Europa)
   • JIS R6001 (Japan)
2. ,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)
3. ,Industry-Specific Testing,
   • Slibemidler: Friability (Bond Index)
   • Ildfaste materialer: Thermal shock resistance (ASTM C1100)
   • Halvleder: Resistivitet (>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

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