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Convex cavity type converter capable of reducing slag discharging amount in tapping process and tapping technology

A technology of tapping process and convex cavity is applied in the field of iron and steel metallurgy to avoid the formation of eddy currents, suppress the formation of eddy currents, and avoid initial slag formation.

Inactive Publication Date: 2020-08-28
SHANDONG VOCATIONAL COLLEGE OF IND +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] The above slag blocking technologies all focus on optimizing and improving the slag blocking equipment to reduce the amount of slag in the tapping process of the converter, while the technical effect of "how to optimize the inner cavity structure of the converter to reduce the amount of slag in the converter "No research has been carried out. In order to solve the deficiencies of the above technologies, the present invention optimizes the shape of the converter cavity and provides a convex cavity converter that can reduce the amount of slag in the tapping process.

Method used

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  • Convex cavity type converter capable of reducing slag discharging amount in tapping process and tapping technology
  • Convex cavity type converter capable of reducing slag discharging amount in tapping process and tapping technology
  • Convex cavity type converter capable of reducing slag discharging amount in tapping process and tapping technology

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Effect test

Embodiment 1

[0105] A steel mill optimized the inner cavity of the converter with a nominal capacity of 120 tons, and designed a convex cavity converter, in which the volume of the convex cavity 4 is 1.5m3, and the depth h of the convex cavity 4 is 0.4m. The area s of the intersection of the inner wall of the convex cavity 4 and the inner wall of the converter 1 is 4m 2 , Compared with before the improvement, the diameter of the tapping hole is increased by 10%, reaching 150mm, and the tapping time is reduced by 18%.

[0106] The tapping process of the convex cavity type converter that can reduce the slag amount in the tapping process of the present invention is:

[0107] Before the converter is smelted, insert the slag cap from the outside of the converter into the outlet 5 of the converter. After the converter is smelted, the steel is placed in the furnace by shaking. At the beginning of the furnace shaking, the slag cap blocks the instant slag, and the converter slag 3 floats to the con...

Embodiment 2

[0109] A steel mill optimized the inner cavity of the converter with a nominal capacity of 260 tons, and designed a convex cavity converter, in which the volume of the convex cavity 4 is 3m 3 , the depth h of the convex cavity 4 is 0.8m, and the area m of the intersection of the inner wall of the convex cavity 4 and the inner side wall of the converter 1 is 12m 2 , Compared with before the improvement, the diameter of the tapping hole is increased by 20%, reaching 240mm, and the tapping time is reduced by 31%.

[0110] The tapping process of the convex cavity type converter that can reduce the slag amount in the tapping process of the present invention is:

[0111] Before the converter is smelted, insert the slag cap from the outside of the converter into the outlet 5 of the converter. After the converter is smelted, the steel is placed in the furnace by shaking. At the beginning of the furnace shaking, the slag cap blocks the instant slag, and the converter slag 3 floats to t...

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Abstract

The invention relates to a convex cavity type converter capable of reducing the slag discharging amount in the tapping process and a tapping technology, and belongs to the technical field of ferrous metallurgy. The convex cavity type converter comprises a converter. A tapping opening is formed in the upper portion of the converter, and the tapping opening outwards protrudes from an inner cavity ofthe converter to form an oval-cone-shaped convex cavity. According to the convex cavity type converter, the convex cavity communicates with the tapping opening and a converter body, a molten pool with the high liquid level is formed above the tapping opening, the generation of vortexes can be restrained under the condition that the pouring speed of the tapping flow is unchanged, and the slag discharging amount is reduced.

Description

technical field [0001] The invention relates to a convex cavity type converter capable of reducing the amount of slag dropped in the tapping process and a tapping process, and belongs to the technical field of iron and steel metallurgy. Background technique [0002] Effective slag blocking operation in converter tapping is an important means to improve the quality of molten steel. It can reduce the consumption of deoxidizers and alloys, reduce the rephosphorization of molten steel, reduce inclusions in steel, improve the cleanliness of molten steel, and provide Refining molten steel provides good conditions. Moreover, the effective slag blocking operation can reduce ladle sticking slag, prolong the service life of the ladle, improve the service life of the refractory material at the tap hole of the converter, and effectively reduce the production cost. Therefore, as an iron and steel enterprise, reducing the amount of slag in converter tapping is the most effective way to i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C5/46C21C5/42
CPCC21C5/42C21C5/4653
Inventor 王博白星良张东峰王鹏飞韩道刚王鸿雁
Owner SHANDONG VOCATIONAL COLLEGE OF IND
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