Deoxidizing technology for electric furnace steel ladle

Abstract

The invention discloses a deoxidizing technology for an electric furnace steel ladle. The technology comprises the steps that limestone and aluminum are ground into powder until the particle size reaches 1 mm or smaller, the limestone ground into the powder and the aluminum ground into the powder are mixed with graphite carbon with the carbon content being 90%, and the mixture is pressed into calcium carbonate carbon aluminum balls with the diameter being 20-30 mm through a dry powder ball press machine, wherein the mass percent of the adding proportion of the limestone accounts for 37-46% ofthe mass of carbon aluminum balls, the mass percent of the adding proportion of aluminum accounts for 40-50% of the mass of the carbon aluminum balls, the mass percent of the adding proportion of graphitic carbon accounts for 4-7% of the mass of carbon balls, and the mass percent of the carbon content among the calcium carbonate carbon balls is controlled to be 5-7%. Calcium carbonate can be quickly fragmented into fine CaO particles and forms a liquid or solid deoxidation product with a deoxidation product, a high reaction speed is achieved, refractory materials and furnace slag are further oxidized through addition of aluminum powder, and oxygen and oxide are conveyed into molten steel; and besides, a residual aluminum oxide product has no influence on the usability of steel, and the deoxidizing efficiency of the molten steel and the quality of the molten steel are further improved.

Description

technical field [0001] The invention relates to a deoxidation process, in particular to a deoxidation process for electric furnace ladles, and belongs to the technical field of deoxidation processes for ladles. Background technique [0002] In the electric furnace or converter steelmaking process, the harmful elements in the scrap steel or molten iron are oxidized from the molten steel, and then converted into steel slag, which enters the slag to achieve the purpose of removal. This steelmaking process causes The molten steel in the converter or electric furnace contains a certain amount of dissolved oxygen. Since the dissolved oxygen exists in the middle of the molten steel or the billet, it will affect the quality of the steel and affect the performance of the steel. The molten steel is deoxidized. After the deoxidizing agent or deoxidizing alloy is deoxidized, part of it reacts with the dissolved oxygen in the molten steel, and the oxides are formed inside the molten stee...

AI Technical Summary

Problems solved by technology

[0003] However, the use of high-intensity argon blowing can only coarsen the bubbles and fail to achieve the purpose of effectively removing inclusions. When calcium carbonate carbon balls are used to deoxidize molten steel, although the amount of deoxidation is increased, the steel with high deoxidation Not applicable

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