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Help CenterDeoxidizing Steel - Cored Aluminum Cakes for Steel - Making and Iron - Smelting in Guangdong, Deoxidizing Steel - Cored Aluminum Blocks for Steel - Making in Steel Plants
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In steelmaking production, using aluminum for deoxidation can effectively reduce the oxygen content and minimize the bubbles generated by the carbon-oxygen reaction. At the same time, it can refine the grain structure of the steel, thereby improving the impact toughness of the steel, reducing the tendency of cold brittleness and aging. Since the specific gravity of aluminum (2.7g/cm) is much smaller than that of molten steel (7.6g/cm3) and steel slag (about 3.59/cm3), and it is very easy to oxidize in air and steel slag. Especially when used for deoxidation in converter steelmaking, aluminum floats on the surface of the molten steel, resulting in large burning losses and low recovery rates. Therefore, in actual production, deoxidizers containing aluminum are often used for deoxidation. They have the characteristics of easily penetrating the molten steel slag layer, having a high melting point of about 1280℃, not easily melting in the molten steel slag layer, and being able to reach the deep layer of the molten steel for melting and deoxidation. When used for the deoxidation and alloying of molten steel, its density is between that of molten steel and steel slag, which can effectively improve the utilization rate of aluminum. In addition to the low carbon content playing a good role in inhibiting the carburization of molten steel, aluminum cakes are easy to store and can be added with a hopper, which not only simplifies the deoxidation and alloying process of molten steel but also reduces the labor intensity of workers.
Metallic aluminum is a commonly used deoxidizer for molten steel in steelmaking production. Some steel plants directly use 5 - 10 kg aluminum ingots to directly put into the ladle for deoxidation. In actual production, due to the large size and slow melting of aluminum ingots, the deoxidation is uneven, resulting in waste of raw materials and prolonged refining time.
Adding circular aluminum cakes for deoxidation belongs to precipitation deoxidation. During precipitation deoxidation, the aluminum alloy is directly added to the molten steel to remove the oxygen in the molten steel. This deoxidation method has a relatively high deoxidation efficiency, takes a short time, and consumes less alloy.
Advantages of steel-core circular aluminum blocks/aluminum cakes for deoxidation:
1: The arc-shaped structure improves the sliding performance between deoxidation blocks, facilitating the smooth feeding from the silo;
2: It melts quickly after being put into the molten steel, and the molten steel is evenly deoxidized under stress;
3: It is not easy to float up after sinking into the molten steel, shortening the deoxidation reaction time and increasing the recovery rate of metallic aluminum. The aluminum content in the steel-core aluminum is ≥60%.
4: It is suitable for ladle refining and molten steel purification of various steels.
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