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Brown Fused Alumina Supplier
Brown fused alumina is made from bauxite through electric-arc melting, crushing and screening. Supply requirements can be discussed for aggregate, graded grains and fines used in bonded abrasives, coated abrasives, blasting and refractory applications.
Confirm the grade, size and supply requirements
Discuss the application, particle-size requirement, acceptance criteria and delivery basis.
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Physical and product data
The following values are transcribed from the product catalog. Confirm acceptance criteria before supply.
| Item | Details |
|---|---|
| Color | Dark brown; dark blue after calcining |
| Crystal system | Trigonal |
| Mohs hardness | ≥9.0 |
| True density | ≥3.90 g/cm³ |
| Bulk density | 1.6–1.99 g/cm³ |
| Melting and processing | Fixed/tilting furnace; Barmac, roll crushing or ball milling |
Grades and chemical data
Percentages follow the source grade table. Confirm the required size and batch specification.
| Grade | Al₂O₃ % | Fe₂O₃ % | SiO₂ % | TiO₂ % |
|---|---|---|---|---|
| Aggregate 0–1 / 1–3 / 3–5 / 5–8 / 8–12 mm | ≥95 | ≤0.3 | ≤1.5 | ≤3.0 |
| Aggregate 25–0 / 10–0 / 50–0 / 30–0 mm | ≥95 | ≤0.3 | ≤1.5 | ≤3.0 |
| Fines 180#–0 | ≥94.5 | ≤0.5 | ≤1.5 | ≤3.5 |
| Fines 200#–0 / 320#–0 | ≥93.5 | ≤0.5 | ≤1.5 | ≤3.5 |
Material specification and evaluation
Brown fused alumina is also known as brown fused aluminum oxide. For cutting or grinding discs, specify the abrasive grain designation separately from aggregate and fines. The aggregate and fines tables do not establish a complete graded-grain specification; request data for the exact grade.
| Enquiry detail | Information to provide or confirm |
|---|---|
| Grade and particle size | Grade name, grain designation or particle-size distribution, and intended application. |
| Acceptance criteria | Required chemical limits, physical properties, size distribution and grade-specific technical documents. |
| Sample review | Discuss sample quantity, evaluation method, acceptance basis and production-trial conditions before ordering. |
| Supply and packing | Purchase quantity, packaging, destination, required schedule and delivery terms. |
Brown fused alumina price per ton and quotation basis
Compare prices for the same grade, particle size, quantity and delivery basis. Confirm whether the quoted tonne is a metric tonne, together with currency, validity, packaging, freight inclusions and delivery terms. Request a specification-based quotation rather than applying one grade’s price to another.
Suitability for a cutting or grinding disc depends on the selected grade and manufacturing process. Use grade-specific information and an agreed sample or trial review before confirming the supply specification.
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