Novel direct continuous casting slag washing mixed material and preparation process thereof

Abstract

The invention relates to a novel direct continuous casting slag washing mixed material and a preparation process thereof, and belongs to the field of special-performance alloy and powder metallurgy novel material in metal materials of the novel materials. The novel heating slag washing mixed material comprises the following components in parts by weight: 30-65 parts of aluminum oxide powder, 30-50 parts of quick lime, 1-6 parts of magnesium oxide powder, 0-6 parts of fluorite and 5-6 parts of silicon dioxide powder. The preparation process of the novel heating slag washing mixed material comprises the following steps of: ball-milling the materials in a ball mill to obtain particle powder; press-moulding the ball-milled particle powder by a ball press, smelting in an electric-arc furnace; and adding 5-40 parts of aluminum powder to the molten liquid during a turning down process, and crushing the cooled material into particles. The novel direct continuous casting slag washing mixed material disclosed by the invention can be used for filtering deoxidized desulfurized molten steel very well, so that produced deoxidation products can be caught effectively and modification of impurities in the steel is promoted, so that the purpose of evolving the molten steel is reached.

Description

technical field [0001] The invention relates to a novel straight-up slag washing mixed material and a preparation process thereof, belonging to the field of special-performance alloys among metal materials among new materials and new powder metallurgy materials. Background technique [0002] my country's steel production continues to develop, steel output increases, and the variety and quality of steel have approached or reached the international advanced level. However, converter steelmaking is still the most important steelmaking method in China. The output of converter steelmaking has increased from 121 million tons in 1998 to 540 million tons in 2008, the proportion of converter steelmaking has increased from about 80% in 1998 to about 90% at present. Casting technology has also made great progress. The variety and output of continuous casting steel have continued to increase. The continuous casting ratio has increased from 68.8% in 1998 to about 98.86% in 2008. With the ...

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Problems solved by technology

[0003] In my country's iron and steel industry, most of them are small and medium-sized converter iron and steel enterprises, and the casting method is basically based on continuous casting. Some iron and steel enterprises have no refining equipment, and some enterprises have refining equipment but insufficient refining capacity, resulting in no Directly enter the continuous casting process through refining