Primary Electro-Fused & Natural Industrial Minerals
Direct factory supply across 8 core mineral series. Calibrated to FEPA 42-1:2006 (F4–F1200, P12–P2500), JIS R6001 (#240–#4000), and refractory section sizes (0-1mm, 1-3mm, 3-5mm, 5-8mm, 200/325 Mesh).
Al₂O₃ ≥ 95.5%
Brown Fused Alumina (BFA)
High-toughness tilting furnace electro-corundum for vitrified/resinoid wheels, sandblasting, and ladle castables.
Al₂O₃ ≥ 99.2%
White Fused Alumina (WFA)
Ultra-pure iron-free Bayer alumina fusion with cool-cutting friability for precision tool grinding and medical blasting.
SiC ≥ 98.5%
Black Silicon Carbide (SiC)
Razor-sharp hexagonal alpha-SiC crystals for stone/glass grinding, ceramic lapping, and high-conductivity kiln furniture.
60 / 80 / 120 Mesh
Almandine Garnet Sand
6x washed hard-rock almandine garnet with <25 ppm chlorides and zero oversize grains for 60,000 PSI CNC waterjets.
Al₂O₃ 80%–88%
Rotary Kiln Calcined Bauxite
1,700°C sintered high-alumina bauxite aggregate and powder for steel ladle castables and HFST anti-skid road surfacing.
4.2 – 5.2 g/cm³
Counterweight Iron Sand
High-specific-gravity ferro-mineral ballast aggregate for crane counterweights, marine hulls, and radiation shielding.
Total Fe ≥ 98.5%
Reduced Sponge Iron Powder
Porous sponge iron powder with high green compressibility for sintered automotive gears, brake pads, and welding rods.
BFA-L & Walnut/Cob
Black Fused Alumina & Soft Media
Tenacious Black Fused Alumina (75–85% Al₂O₃) for stainless steel buffing, plus biodegradable Walnut Shell & Corn Cob media.
Why Global Foundries & Wheel Makers Source Directly from Gongyi Fengtai
Export trading companies mix batches from multiple small workshops, causing unpredictable bulk density, erratic sieve curves, and sudden iron contamination in your grinding wheels or ladle castables. At Gongyi Fengtai, we control the entire metallurgical chain under one roof.
2,250°C Tilting & Fixed Electric Arc Furnaces
Extended 8-hour smelting cycles in tilting furnaces ensure complete alpha-corundum crystal growth, lower residual carbon, and superior impact toughness compared to rapid-melt ingots.
Barmac Autogenous Impact Shaping
Rock-on-rock high-velocity impact crushing eliminates weak flat or needle-shaped particles, producing blocky, isometric grains that maximize bulk density (LPD) and resin/vitrified bond retention.
Triple-Stage 12,000-Gauss Magnetic Separation
Every ton of crushed grain passes through rare-earth NdFeB magnetic drum and roll separators to strip ferrosilicon and free iron down to ≤0.015%, preventing rust spots on blasted steel and kiln blisters.
10,000 MT Buffer Inventory & Direct Factory Pricing
By purchasing directly from our Gongyi smelting plant, industrial buyers save 15%–25% over trading intermediaries while securing priority dispatch from our 10,000 MT standard FEPA grit stock.
Master Mineral Chemical & Physical Comparison Matrix
Compare key metallurgical indicators across our primary electro-fused, synthetic, natural, and metallic media series to select the optimal grade for your thermal or surface engineering process.
| Mineral Series | Primary Chemical Assay | Mohs Hardness | True Gravity | Bulk Density (LPD) | Max Service Temp | Standard Gradings |
|---|---|---|---|---|---|---|
| Brown Fused Alumina (BFA) | Al₂O₃ ≥ 95.5%, TiO₂ 1.8–2.8% | 9.0 | ≥ 3.92 g/cm³ | 1.75 – 1.95 g/cm³ | 1,850°C | FEPA F12–F1200, P12–P220, 0-1-3-5mm |
| White Fused Alumina (WFA) | Al₂O₃ ≥ 99.2%, Fe₂O₃ ≤ 0.05% | 9.0 | ≥ 3.95 g/cm³ | 1.75 – 1.90 g/cm³ | 1,900°C | FEPA F12–F1200, JIS #240–#4000, 0-1-3-5mm |
| Black Silicon Carbide (SiC) | SiC ≥ 98.5%, Free C ≤ 0.20% | 9.2 – 9.3 | 3.20 g/cm³ | 1.45 – 1.62 g/cm³ | 1,950°C | FEPA F12–F1200, 0-1-3-5-8mm, 88–95% Met |
| Almandine Garnet Sand | Almandine ≥ 97%, Cl⁻ < 25 ppm | 7.5 – 8.0 | 4.10 g/cm³ | 2.30 – 2.45 g/cm³ | 1,315°C | 60# / 80# / 120# Waterjet; 20/40, 30/60# Blast |
| Rotary Kiln Calcined Bauxite | Al₂O₃ 80% / 85% / 88% Min | 8.0 – 8.5 | ≥ 3.50 g/cm³ | 2.85 – 3.15 g/cm³ | 1,790°C | 0-1, 1-3, 3-5, 5-8mm, HFST 1-3mm, 200/325# |
| Counterweight Iron Sand | Total Fe 90.0% – 95.0% | 6.5 – 7.5 | 6.5 – 7.2 g/cm³ | 4.20 – 5.20 g/cm³ | 1,450°C | 0.5–2.0mm, 1.0–3.0mm, 2.0–5.0mm Ballast |
6-Stage Smelting, Crushing & Precision Grading Pipeline
Every metric ton shipped from our Gongyi plant undergoes six controlled metallurgical and mechanical processing stages to guarantee uniform crystal density and zero oversize contamination.
High-Grade Feedstock Preparation
Selected Henan diaspore bauxite, Bayer-process industrial alumina, and low-ash petroleum coke are assayed by XRF before charging to eliminate alkali and silica fluctuations.
Tilting & Acheson Furnace Smelting
Electro-fusion at 2,250°C–2,400°C followed by controlled slow solidification produces large, high-density primary crystals with minimal internal micro-porosity.
Cubical Grain Morphology Control
Jaw, roller, and Barmac vertical-shaft impact crushers shape grains into high-sphericity cubical geometry for superior packing density in grinding wheels and castables.
12,000-Gauss Iron Removal & Pickling
High-intensity rare-earth magnetic separation and multi-stage counter-current washing remove free iron (≤0.015%), soluble salts, and adherent micro-dust.
FEPA / JIS / ANSI Precision Grading
Automated multi-deck linear vibrating screens for macro grits (F12–F220) and hydraulic/air classification for micro powders (F240–F1200, JIS #240–#4000).
Batch COA & ISPM-15 Seaport Staging
Final XRF and Ro-Tap verification prior to automated load-cell bagging into 25kg valve bags or 1,000kg jumbo bags on fumigated ISPM-15 wooden pallets.
Engineered for Six Critical Heavy Industry Sectors
Our metallurgical engineers match grain friability, bulk density, and sieve distribution curves to your specific manufacturing line.
Vitrified Grinding Wheels & Abrasive Belts
High-LPD Brown & White Fused Alumina and Black SiC calibrated to FEPA F12–F220 and P12–P2500 for cutting discs, snagging wheels, and coated sanding belts.
Monolithic Castables & Ladle Refractories
High-density section sands (0-1mm, 1-3mm, 3-5mm, 5-8mm) and -200/-325 mesh matrix fines withstanding 1,850°C molten slag erosion in blast furnace runners and ladles.
Sa 2.5 / Sa 3 Sandblasting & Peening
Silica-free, low-dust angular blasting media capable of 5–8 recyclability cycles for ship hulls, wind towers, petrochemical tanks, and stainless aerospace parts.
60,000+ PSI Precision Waterjet Cutting
6x washed hard-rock Almandine Garnet screened to strict mesh tolerances for uninterrupted focusing-tube flow and burr-free cutting of titanium, steel, and stone.
Counterweight & Radiation Shielding
High-density metallic iron sand (4.2–5.2 g/cm³ packed density) for excavator and crane counterweights, offshore ballast tanks, and nuclear shielding concrete.
Powder Metallurgy & Non-Destructive Cleaning
High-compressibility sponge iron powder for sintered gears & brake pads, alongside biodegradable Walnut Shell & Corn Cob media for turbine and mold cleaning.
Heat-by-Heat Laboratory Verification & Batch COA
Every production lot is tested in our on-site Gongyi laboratory prior to bagging. A signed Certificate of Analysis (COA) and MSDS accompany every export Bill of Lading, with a sealed 500g reference sample retained for 12 months.
Moisture-Proof Export Packaging & Container Loading
Engineered to prevent bag tearing and moisture clumping during 30–45 day oceanic transit. Dispatched directly from Qingdao, Tianjin, or Shanghai ports under FOB, CFR, CIF, or DDU terms.
Frequently Asked Questions from Industrial Buyers
Direct answers regarding furnace grades, grit sizing standards, sample dispatch, and export payment terms.
01. What is the difference between Tilting Furnace and Fixed Furnace BFA?
Tilting furnace BFA offers higher Al₂O₃ purity (≥95.5%), lower magnetic content, and superior crystal toughness for vitrified grinding wheels and steel ladle castables. Fixed furnace BFA provides economical bulk toughness for heavy sandblasting.
02. Can you screen custom particle size distributions (FEPA / JIS / ANSI)?
Yes. Our Gongyi plant operates dedicated screening lines for FEPA F4–F1200, FEPA P12–P2500, JIS R6001 #240–#4000, refractory section sands (0-1mm, 1-3mm, 3-5mm, 5-8mm), and buyer-specified custom sieve curves.
03. How do I request a free 1kg–5kg laboratory test sample?
Click any "Request Quote & Free Sample" button on our site. We provide 1kg to 5kg representative batch samples free of charge, dispatched within 24–48 hours via DHL, FedEx, or TNT alongside the batch COA.
04. What is your Minimum Order Quantity (MOQ) and container lead time?
Our commercial trial MOQ is 1 Metric Ton (LCL palletized). Standard 20' FCL orders (20–25 MT) ship from Qingdao or Tianjin Port within 7 to 10 working days under FOB, CFR, or CIF terms (T/T or L/C at sight).
Request Factory Quotation, Batch COA & Free Samples
Submit your target mineral grade, grit size, and destination port. Our Gongyi plant metallurgical sales engineers will reply with a formal FOB/CIF quotation and laboratory COA within 4 business hours.