Brown fused alumina, also known as brown corundum, is a high-grade artificial abrasive manufactured by smelting bauxite in electric arc furnaces at ultra-high temperatures. It is one of the most widely used abrasives for surface blasting, grinding and refractory materials across industries.
Key Physical Properties
- Mohs hardness: 9.0
- High mechanical strength and impact resistance
- Good thermal stability and chemical inertness
- Sharp angular grain shape, strong cutting capacity
| SIZE | AL2O3MIN | SIO2MAX | TIO2MAX | Fe2O3MAX |
| 12#-80# | 94.5-97% | 0.6-0.8% | 1.5-3% | 0.12-0.2% |
| 100#-180# | 93.5% | 0.7-1% | 1.5-3.8% | 0.15-0.25% |
| 240#-280# | 92% | 0.85-1.1% | 1.5-3.8% | 0.18-0.35% |
Main Features
- High durabilityExcellent toughness makes it not easy to crush during use. It can be recycled 3 to 5 times in dry blasting systems, helping cut material costs.
- Low health hazardFree of free silica, so it generates less toxic dust compared with silica sand. It complies with industrial safety standards for long-term operation.
- Stable performanceIt does not react chemically with steel, metal alloys or most coatings. It will not cause corrosion or surface contamination to workpieces.
- Uniform surface effectIts regular grain shape creates even surface roughness, ideal for pre-treatment before painting, coating and anti-corrosion construction.
Main Applications
- Surface blasting: Rust removal, mill scale elimination, paint stripping and surface roughening for steel structures, ships, machinery, castings and metal parts.
- Grinding & polishing: Used for abrasive tools, grinding wheels and polishing media for metal processing.
- Refractory materials: Applied in high-temperature industrial furnaces due to great heat resistance.
- Other uses: Filter media, wear-resistant fillers and ceramic raw materials.
Advantages of Brown Fused Alumina for Steel Blasting
- High hardness & strong cutting powerWith Mohs hardness 9.0, it efficiently removes rust, mill scale, old paint and weld spatter from steel surfaces quickly.
- Excellent toughness & reusabilityIt resists breaking easily during blasting. The abrasive can be recycled 3–5 times, greatly lowering operating costs.
- Uniform surface finishProduces consistent surface roughness, which improves adhesion of paints, coatings and anti-corrosion layers on steel.
- Low dust & safe to useContains no free silica, so it causes less harmful dust and reduces health risks for operators.
- Wide adaptabilityWorks well for all types of steel: carbon steel, structural steel, steel pipes, castings and heavy machinery parts.
- Good chemical stabilityIt is inert and will not contaminate or corrode steel workpieces during surface treatment.