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 present invention involves a straight washing mixed material and its preparation process, which belongs to the special performance alloy and powder metallurgical material field in metal materials in new materials. Background technique [0002] my country's steel production has continued to develop, steel production has increased, and steel varieties and quality have been close to or reached the international advanced level. The steelmaking steelmaking is still the most important steelmaking method in China. In 2008, 540 million tons, the proportion of steelmaking in the furnace increased from about 80%of 1998 to about 90%.The casting technology has also made great progress, and the variety and output of cast steel have continued to increase. The cast -to -cast ratio increased from 68.8%of 1998 to 98.86%in 2008. With the improvement of the Lianfang ratio, the proportion rate also increased significantly. It has made important contributions to the increas...

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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