Silicon aluminum ferroalloy is a strong deoxidizing agent, is also the production of other metal and alloy reducing agent, it is also used for thermite welding, manufacturing heating agent and explosives, silicon aluminum ferroalloy technical conditions have no national standards and ministry standards, the average size of the product is 30 ~ 100mm, each batch is allowed to have 15% of the particles factory, the surface of the product should not be obvious bubbles and non-metallic inclusions.
In the process of steel making, aluminum and silicon aluminum iron are strong deoxidizer, but the price of aluminum is expensive, and the density is small, low melting point, easy oxidation, most aluminum in the process of use in the surface of liquid steel combustion, its utilization rate is only 30%; Because of its high density and high melting point, it is easy to sink into the molten steel, so its utilization rate can reach 70%. The traditional method of refining ferrosilicon aluminum is to melt ferrosilicon and aluminum, which requires a large amount of aluminum and high cost, while the ore-heating furnace method takes bauxite as the main raw material, which has wide resources, low price and broad prospects for development.
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