Technical Buyer's Guide To White Fused Alumina (WFA)

White Fused Alumina (WFA) is manufactured by fusing high-purity calcined alumina powder in an electric arc furnace at temperatures above 2000℃. Featuring a uniform α-Al₂O₃ crystalline structure, high Mohs hardness (9.0), excellent toughness, good self-sharpening properties, and strong chemical stability, WFA is an essential raw material for advanced abrasives and refractory linings. Industrial procurement teams rely on HUAO for premium White Fused Alumina engineered to perform reliably across high-temperature and heavy-wear applications.

 

 

 

When selecting White Fused Alumina, evaluating physical parameters helps guarantee structural stability during mechanical grinding or high-temperature firing:

 

Mohs Hardness (9.0) & Toughness: High crystalline hardness combined with self-sharpening fracture characteristics ensures long-lasting abrasive cutting efficiency.

Fire Resistance (1850℃): Excellent refractoriness preserves structural integrity in extreme thermal environments without softening.

Specific Gravity (3.95 g/cm³) & Density (3.6 g/cm³): High material density provides compact particle packing for refractory castables and bonded abrasives.

Apparent Porosity (7%): Low porosity limits chemical slag infiltration and protects against liquid metal erosion.

 

 

WFA is categorized into coarse particles and micro-powders, each meeting specific purity and mesh criteria:

 

Particle Series (0-1mm, 1-3mm, 3-5mm, 5-8mm): Features high chemical purity with Al₂O₃ 99.4%, Na₂O 0.3%, SiO₂ 0.08%, and Fe₂O₃ 0.08%. Designed as structural aggregates for refractory bricks, castables, and coarse grinding wheels.

Powder Series (200 mesh, 325 mesh): Offers chemical specifications of Al₂O₃ 99.2%, Na₂O 0.35%, SiO₂ 0.1%, and Fe₂O₃ 0.1%. Functions as reactive matrix fillers for unshaped refractories, precision lapping, and fine polishing compounds.

 

 

White Fused Alumina is supplied in two functional grades tailored to distinct processing requirements:

 

Abrasive Grade Application:

Sandblasting & surface cleaning

Grinding wheels & cutting discs

Coated abrasives (sandpaper / belts)

Precision lapping & polishing

Wear-resistant coating fillers

 

Refractory Grade Application:

Steel metallurgy furnace linings

Glass melting tank & regenerator

Ceramic kiln furniture

Petrochemical cracking furnaces

Cement rotary kiln castables

 

 

Sourcing White Fused Alumina requires consistent grain size distribution, strict iron control, and stable bulk density. HUAO implements rigorous quality management protocols from electric arc fusion to final screening, ensuring batch-to-batch reliability. With customizable grain sizing and flexible global export options, We assist industrial clients in optimizing processing yields and extending equipment campaign life. Choosing the right White Fused Alumina involves matching chemical purity (Al₂O₃ 99.2% - 99.4%) and physical form (particles vs. fine powders) to specific abrasive or refractory operational needs.

 

 

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