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Brown Fused Alumina

Author:Jinlin corundumTo update: 2016-09-09

In abrasive products, and abrasive brown fused alumina is essential, because of its grinding performance, apply a wide range, the price is cheap, is widely used.

Jinlin brown fused alumina , also known as carborundum, specific gravity is 3.85g / cm3, the appearance of brown-red or brown-black particles, based on bauxite, coke (anthracite) as main raw materials, smelting in electric arc furnace at high temperatures and a brown artificial fused alumina. But brown fused alumina impurities in the products in the course of life. Because the impurity has not been completely removed during smelting, brown fused alumina therefore also contains six aluminum, calcium plagioclase, spinel, rutile crystal phase and the second phase of glass, ferro alloys and solid solutions. Largely speaking,  brown fused alumina smelting process and brown fused alumina smelting time determines the product performance and quality.

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But in recent years the company break through the traditional process, the first use of secondary refining smelting technology in the industry, completely solve the burst, chalking phenomenon appeared in brown fused alumina refractory process, not only used in the general casting material, shading baked goods, even a high temperature sintered fused alumina bricks, air bricks and other products are also fully meet the stability of the product.

Jinlin brown fused alumina particle size in accordance with international standards and national standards of production, can also be processed in accordance with the production of granular user requirements. Jinlin brown fused alumina most commonly sold size No. F4 ~ F320, its chemical composition varies depending on grain size of the brown fused alumina. But brown fused alumina level is divided by the aluminum content, the lower the hardness of aluminum content is also lower, and vice versa, versa.

Jinlin brown fused alumina appearance of the product use is in accordance with the level of Jinlin brown fused alumina to division.

Jinlin stair brown fused alumina appearance of brown-red, black granular, mainly used for precision casting, wear-resistant materials, abrasive products for demanding industries, such as manufacturing precision polishing wheel, brown fused alumina grinding wheel is the most a major class of abrasive.

Jinlin brown fused alumina black granular appearance, mainly used in sandblasting, polishing, grinding, corrosion rust, stone carving, gauze material, cutting tablets. For example to clean the surface of the workpiece, the workpiece surface before the coating process, changing the physical and mechanical properties of the workpiece, on the workpiece surface gloss appearance and other processing.

Jinlin three brown fused alumina: black or gray powder particles can be applied to a variety of ground needed to sand the floor. Such as airport runways, playgrounds, and factory wear-resistant floor.

Jinlin brown fused alumina technical indicators:

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Jinlin brown fused alumina physical and chemical indicators:

Physical properties: Form trigonal

Density: 3.85 g / cm3

Hardness: Hardness efforts Spectrum 2000 – 2200 Kg / mm2

Mohs hardness: 9.0

Melting point: 2250 C

Maximum operating temperature: 1900 C

Specific heat: (Cal / g C.) 0.26 (20 – 90 C)

Thermal conductivity at room temperature 900 C (Cal / cm3. Sec. C)

Refractive index: e = 1.760 w = 1.768 (Na line)

Resistivity: 30C 300C 900C 1600C (cm)

Linear expansion coefficient: 7 – 9 (0 – 1600 C)

Jinlin Gangyu Refractories Company is a professional manufacturer of abrasives, the company survive by quality, service and development, always to the contract, for the purpose of keeping promises, welcomed all the friends come to visit, guidance and business negotiation.

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