A method for rapid slag formation in the tapping process of high-quality steel

Abstract

The invention discloses a method for rapid slag formation in the tapping process of high-quality steel. During production, the tapping temperature of an electric furnace or a converter is controlled at 1630°C-1680°C to meet the needs of refining slag melting and deoxidation in the tapping process; , when the tapping amount reaches 30-80%, add pre-deoxidizer and alloy to the molten steel casting stream through the alloy chute to realize the initial precipitation deoxidation of molten steel; Blow the flow of argon to keep the diameter of the exposed surface of the molten steel at 200-600mm, and at the same time spread aluminum particles evenly on the slag surface. In the tapping process of the converter or electric furnace, the invention quickly forms a low-oxidation and high-fluidity refining slag system through deoxidation alloying of molten steel and evenly spreading aluminum particles on the slag surface, which not only improves the refining efficiency of the LF refining process, but also improves the Improve the refining effect of molten steel and improve the quality of molten steel to solve the problem that the deoxidation and rapid slagging of refining slag cannot be effectively realized in the current tapping process of electric furnace or converter.

Description

technical field [0001] The invention relates to the technical field of steelmaking, in particular to a method for quickly forming slag in the tapping process of high-quality steel. Background technique [0002] Rapid slag formation in the tapping process of electric furnace or converter has always been the goal of metallurgical technology. Rapid slagging in the tapping process can not only greatly improve the refining efficiency, but also improve the refining effect of molten steel and improve the quality of molten steel. At present, in the tapping process of high-quality steel, in addition to adding a certain amount of deoxidizer and alloy to achieve deoxidation and alloying of molten steel, some slag is also added, but the slag system has not been deoxidized, so there is a large amount of FeO in the slag, and to LF The oxidizing property of the slag in the refining station is very high, and the oxidizing index FeO+MnO in the slag generally exceeds 4%. [0003] In the LF r...

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a method for rapid slag formation in the tapping process of high-quality steel. In the tapping process of converter or electric furnace, through the deoxidation alloying of molten steel and the method of evenly spreading aluminum particles on the slag surface, a low-oxidizing high-strength slag can be quickly formed The fluid refining slag system not only improves the refining efficiency of the LF refining process, but also improves the refining effect of molten steel and improves the quality of molten steel, so as to solve the problem that the refining slag cannot be effectively deoxidized and fast Slagging problem

Images