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Mud material capable of reducing roughing slag in earlier steel tapping period of converter and blocking steel tapping hole and use method thereof

A tapping hole and mud material technology, applied in the manufacture of converters, etc., can solve problems such as easy falling, achieve simple operation, strong applicability, and improve the effect of early slag blocking

Active Publication Date: 2015-12-02
SHIJIAZHUANG IRON & STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem that the slag blocking cap and lightweight slag blocking plug can only be blocked outside the tapping hole, and at the same time, they are easy to fall during the process of tapping the furnace downwards, the present invention proposes a method to reduce the slag and sealing Mud for plugging the steel hole and its application method

Method used

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  • Mud material capable of reducing roughing slag in earlier steel tapping period of converter and blocking steel tapping hole and use method thereof
  • Mud material capable of reducing roughing slag in earlier steel tapping period of converter and blocking steel tapping hole and use method thereof

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Effect test

Embodiment 1

[0014] A mud material for reducing slag in the early stage of converter tapping and blocking the tapping hole. The mass fraction of chemical components is as follows: CaO: 75 parts, C: 7 parts, SiO 2 : 10 parts, MgO: 7 parts, FeO: 0.5 parts, water: 0.5 parts.

[0015] How to use: After tapping, clean the remaining steel slag in the tapping hole, block the mud material inside the tapping hole, the mud material will be heated and bonded with the tapping hole to block the tapping hole, and at the same time It can reduce the erosion of the taphole by the high temperature flame and high temperature steel slag in the blowing process, and improve the service life of the taphole.

[0016] When the mud is tapped, it is necessary to use an iron pipe to open a small hole in the center of the mud in advance, so as to ensure that the mud will not fall off when the furnace is shaken at -70 degrees, and there will be no slag gushing out, and it can be guaranteed at -85 Due to the pressure o...

Embodiment 2

[0019] Reduce the slag at the early stage of converter tapping and the mud that blocks the tapping hole. The chemical composition mass fraction is as follows: CaO: 80 parts, C: 5 parts, SiO 2 : 7 parts, MgO: 7 parts, FeO: 0.5 parts, water: 0.5 parts.

[0020] How to use: After tapping, clean the remaining steel slag in the tapping hole, block the mud material inside the tapping hole, the mud material will be heated and bonded with the tapping hole to block the tapping hole, and at the same time It can reduce the erosion of the taphole by the high temperature flame and high temperature steel slag in the blowing process, and improve the service life of the taphole.

[0021] When the mud is tapped, it is necessary to use an iron pipe to open a small hole in the center of the mud in advance, so as to ensure that the mud will not fall off when the furnace is shaken at -70 degrees, and there will be no slag gushing out, and it can be guaranteed at -85 Due to the pressure of the mol...

Embodiment 3

[0024] Reduce the slag in the early stage of converter tapping and the mud that blocks the tapping hole. The chemical composition mass fraction is as follows: CaO: 85 parts, C: 3 parts, SiO 2 : 5 parts, MgO: 6 parts, FeO: 0.5 parts, water: 0.5 parts.

[0025] Using method: with embodiment 1.

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Abstract

The invention discloses a novel mud material capable of reducing roughing slag in the earlier steel tapping period of a converter and blocking a steel tapping hole. The novel mud material is prepared from, by mass, 75-85 parts of CaO, 3-7 parts of C, 5-10 parts of SiO2, 3-7 parts of MgO, 0.1-0.5 part of FeO and 0.2-1.0 part of water. The use method includes the steps that after steel tapping is finished, residual steel slag in the steel tapping hole is cleaned up, the mud material blocks the inner side of the steel tapping hole, and the mud material is bonded with the steel tapping hole when heated, so that the function of blocking the steel tapping hole is achieved; meanwhile, corrosion to the steel tapping hole by high-temperature flame and high-temperature steel slag in the blowing process can be reduced, and the service life of the steel tapping hole is prolonged. The novel mud material can completely prevent the roughing slag in the earlier steel tapping period of the converter from entering a steel ladle, improves the slag blocking effect in the earlier period, is easy to operate, and is high in applicability. The components of the novel mud material are better than those of refining slag, so that the novel mud material can not pollute molten steel when falling into the steel ladle in the steel tapping process.

Description

technical field [0001] The invention belongs to the technical field of iron and steel industry production, and in particular relates to reducing slag in the early stage of converter tapping, and mud material for blocking the tapping hole and its use method. Background technique [0002] As users have higher and higher requirements for steel quality, in the actual production on site, the converter is required to minimize the amount of slag during the tapping process, reduce the oxidation of molten steel and improve the refining effect. The research on slag blocking technology in the middle and later stages (slag blocking plug, sliding plate slag blocking, etc.) is relatively mature and practical, but for the early stage slag (that is, from the beginning of tapping the furnace to seeing the steel flow into the ladle), the blocking technology at this stage There are generally two ways of slag blocking caps and lightweight slag blocking plugs. The molten steel can only be seen ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C5/28
Inventor 杨锋功容晨光李建业刘勇胡云生王恭亮刘泳华祺年
Owner SHIJIAZHUANG IRON & STEEL