Control method for steel tapping of converter

Abstract

The invention relates to a control method for steel tapping of a converter. During the process of the steel tapping of the converter, the converter is gradually rolled down to enable molten steel to be poured into a steel ladle from the tapping hole of the converter; the steel tapping inclination angle of the converter is controlled, and when the steel tapping inclination angle is 70 degrees, the steel tapping operation is performed; while the inclination angle of the converter is gradually increased, timing is performed; when steel tapping is completed, the steel tapping inclination angle of the converter is 95-100 degrees. According to the invention, the success rate of slag-blocked tapping is increased to 98% from 80%; the amount of slag roughing is calculated on the basis of the thickness of slag on the surface layer of steel ladle after steel tapping, and the result shows that the average thickness of the slag is reduced to 3 cm from 7 cm; the problem that wastes are produced due to serious rephosphorization is solved; the oxygen content of steel is slightly lowered, and the inclusion content is further lowered.

Description

technical field [0001] The invention relates to a converter steelmaking production method in the iron and steel metallurgy process, and more specifically, relates to a converter steel tapping control method. technical background [0002] During the tapping process of the converter, the original tapping control depends entirely on the workers' naked eye observation and experience judgment. Due to the harsh environment on site, it affects people's vision and judgment ability, and the judgment error is relatively large, often resulting in unclean molten steel or ladle slag. The main effects are as follows: (1) The molten steel is not clean, resulting in low molten steel yield, and affects the effect of slag splashing to protect the furnace, and the life of the furnace lining is reduced; (2) The slag lowers the alloy yield, which not only increases the amount of alloy used , and the fluctuation of the amount of alloy used also affected the stability of the molten steel compositi...

AI Technical Summary

Problems solved by technology

[0002] During the tapping process of the converter, the original tapping control depends entirely on the workers' naked eye observation and experience judgment. Due to the harsh environment on site, it affects people's vision and judgment ability, and the judgment error is relatively large, often resulting in unclean molten steel or ladle slag. The main effects are as follows: (1) The molten steel is not clean, resulting in low molten steel yield, and affects the effect of slag splashing to protect the furnace, and the life of the furnace lining is reduced; (2) The slag lowers the alloy yield, which not only increases the amount of alloy used , and the fluctuation of the amount of alloy used also affected the stability of the molten steel composition; (3) After the slag was removed, the molten steel returned phosphorus to a large extent, which would lead to waste in severe cases; (4) The inclusions and oxygen in the steel were increased after the slag was removed. content, which has a great influence on the purity of molten steel

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