Brown Fused Alumina

1. In-depth technical analysis

a. Optimization of production processes 

Electric arc furnace smelting technology: It uses high-temperature smelting above 2200℃, and precisely controls the ratio of bauxite to coke (typical ratio 7:1) to ensure the purity of Al₂O₃ crystals.

Post-processing technology: After crushing, it undergoes magnetic separation to remove iron (iron content can be reduced to below 0.2%) and hydraulic classification to enhance product consistency.

b. Microstructure characteristics 

Crystal form: Rhombic hexahedral structure, with a shell-like fracture surface, enhancing the cutting force during grinding.

Porosity: ≤3% (high-density type), suitable for precision casting coatings.

2. Detailed application scenarios

Industry Specific uses Recommended particle size

Aerospace Turbine blade polishing, composite material processing W10-W40 (micron grade)

Automotive Engine part deburring, brake pad surface treatment F24-F80 (medium-coarse grit)

Electronics Semiconductor wafer backside thinning, sapphire glass cutting JIS 8000# (ultra-fine powder)

Building ceramics Tile glaze surface grinding, bathroom fixture matte treatment F100-F220 (fine powder)

Oil drilling Drill bit coating enhancement (reducing the cost of diamond coating) Segmented sand (1-3mm)

3. Customized solutions

Composite abrasives: Brown fused alumina + silicon carbide mixed abrasives (adjustable ratio), for stainless steel polishing (balancing efficiency and surface finish).

Coated abrasives: Ti/TiO₂ coated brown fused alumina (improving resin grinding wheel bonding strength, extending service life by 30%).

Low sodium type: Na₂O content < 0.1%, suitable for high-end refractory castables (reducing high-temperature glass phase formation).

4. Performance comparison data (competitive differentiation)

Indicator Brown fused alumina (BFA) White fused alumina (WA) Silicon carbide (SiC)

Hardness (Mohs) 9.0 9.1 9.5

Toughness index ★★★★☆ ★★★☆☆ ★★☆☆☆

Acid and alkali resistance (pH 2-12) Excellent Excellent Poor (oxidation)

Cost (yuan/ton) 4,500-6,000 7,000-9,000 8,000-12,000

5. Industry certifications and compliance

International standards: Compliant with ISO 8486-1:2023 (grain size), ASTM C618 (refractory grade).

Environmental certifications: RoHS 2.0 (no heavy metals), REACH SVHC list exemption.

Special certifications: DNV ship grade blasting abrasive certification, NADCAP aerospace supply chain qualification.

6. Customer case endorsements

Case 1: Provided F54 grade brown fused alumina to a German auto parts supplier, replacing the original silicon carbide solution, reducing polishing costs by 35%.

Case 2: Collaborated with a Middle Eastern refractory materials factory to develop Al₂O₃ ≥ 97% high-purity brown fused alumina for steel ladle linings, increasing service life to 200 cycles.

7. Technical service support

Free samples: Provide 500g small sample testing (shipped within 3 working days).

Technical consultation: Provide grinding parameter optimization solutions (such as pressure, speed, and particle size matching suggestions).

Waste recycling: Old grinding wheels/waste abrasive recycling and regeneration services (reducing customer environmental disposal costs).

8. Market trends and innovation directions

Green manufacturing: Developing solar melting technology (reducing carbon emissions by 30%).

Nanometer application: 50-100nm brown fused alumina powder in the experimental stage (for CMP polishing liquid).

Contact Us Now:

WhatsApp:/WeChat:+86 13238994391

Email:customer@amanda.net.cn

Gracie Zhang/Sales Manager

Sales Departments | AMANDA INTERNATIONAL PRIVATE LIMITED