Many people know that brown aluminum oxide and white aluminum oxide are widely used and can be regarded as the teeth of industry in industrial development. However, few people know the difference between the smelting methods of brown aluminum oxide and white fused alumina. In fact, it is precisely because of the different smelting methods that the two products of brown aluminum oxide and white aluminum oxide appear. Today, let us learn about the difference between the smelting methods of brown aluminum oxide and white fused alumina.
The difference between brown aluminum oxide and white aluminum oxide smelting methods
The difference between white fused alumina and brown aluminum oxide smelting: white aluminum oxide is produced by pouring method, and the lining construction materials are usually white fused alumina sand or alumina powder. The receiving bag includes unlined receiving bag and lined receiving bag. The unlined seam bag should be forced water-cooled. Usually, graphite or white aluminum oxide refractory products are used as the lining of the lining.
For the production of white fused alumina by the frit method, the furnace lining requires good thermal insulation and air permeability. The furnace body is divided into lined type and unlined type. Sintered products usually require lining, and the heat loss of unlined accounts for 24% of the product energy consumption, and only 4% of the lining heat loss.
Like brown aluminum oxide, white aluminum oxide uses alumina powder as the main raw material, is suitable for pink fused alumina, etc., and melts at high temperatures. Pink fused alumina is pink, with a hardness similar to that of white fused alumina, and a higher toughness than that of white aluminum oxide.
White fused alumina has good abrasive durability and high finish. It is suitable for precision grinding of measuring tools, machine tool spindles, instrument parts, threaded workpieces and template milling cutters. In the metallurgical industry, chromite is mainly used to produce ferrochrome and metallic chromium. Ferrochrome is used as an additive to steel to produce various high-strength, corrosion-resistant, wear-resistant, high-temperature-resistant and oxidation-resistant special steels, such as stainless steel, acid-resistant steel, heat-resistant steel, ball bearing steel, spring steel, tool steel, etc.
In addition, white aluminum oxide is made from industrial alumina powder by melting in an arc at a high temperature of more than 2000 degrees, cooling, crushing and forming, magnetic separation to remove iron, and screening into various particle sizes. White fused alumina has a dense texture, high hardness, and sharp edges and corners. It is suitable for manufacturing ceramics, resin-bonded abrasives, grinding, polishing, sandblasting, precision casting (corundum for precision casting), etc. It can also be used to manufacture advanced refractory materials.
