A converter tapping hole, converter and converter masonry, and steel tapping method

Abstract

The invention discloses a converter tapping hole, a converter and a converter masonry, and a steel tapping method, which belong to the technical field of iron and steel metallurgy and solve the problems of low tapping efficiency of the converter, large amount of slag in the converter tapping and poor metallurgical effect in the prior art , The problem of low service life of the tap hole of the converter. The converter taphole of the present invention includes a taphole ring brick, and molten steel channels are formed inside the taphole ring brick, wherein the number of molten steel channels is two. The converter includes a converter tapping hole and a converter body. The converter tapping hole is arranged on one side of the converter body. The angle between the axis of the molten steel channel and the axis of the converter is 80-84°. The converter of the invention has high tapping efficiency, a small amount of slag dropped during tapping, and the service life of the tapping hole is improved.

Description

technical field [0001] The invention relates to the technical field of iron and steel metallurgy, in particular to a converter tapping hole, a converter and a converter masonry and tapping method. Background technique [0002] The tap hole has special significance for the lining of the converter, it is the only channel for molten steel to enter the ladle from the converter. Due to the large amount of molten steel passing through the taphole, it needs to withstand the erosion and oxidation erosion of high-temperature molten steel all the time, and the working conditions are very harsh. Generally, the service life of the taphole is very short, and the cycle of repair or replacement is short, which affects production stability and molten steel. Quality has a direct impact. The structure of the taphole has an important impact on the tapping operation of the converter. The molten steel channel with a smaller diameter takes longer to tap, which affects the smelting cycle, reduces...

AI Technical Summary

Problems solved by technology

[0004] After in-depth research by the applicant, it has been shown that in the amount of slag dropped from the converter to the ladle, the amount of slag in the early stage accounts for roughly 30%, the amount of slag brought down from the surface of molten steel by the vortex effect is about 30%, and the amount of slag in the later stage is about 40%. It is particularly important to reduce the amount of slag in the entire tapping process by reasonably improving the tapping hole. At present, most of the research work is to improve the refractory material of the tapping hole or optimize the tapping hole. The diameter of the inlet and outlet and the measures to reduce the tapping temperature are used to improve the service life of the tapping hole. For example, Maanshan Iron and Steel Co., Ltd. expands the diameter of the tapping hole to 210 / 240mm, and controls the amount of slag dropped by the ladle and improves The tapping speed has achieved a certain effect, but the production process of the slide plate and the quality of the refractory material are high, and the cost of use increases, which is not suitable for general small and medium-sized converters.

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