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Self-flowing filling material suitable for converter body cavity lining making as well as preparation method and application of self-flowing filling material

A converter furnace body and filling material technology, applied in the field of self-flowing filling materials, can solve the problems of unsatisfactory construction operation and bonding strength, uneven mixing with water, loose material structure, etc., and achieve good thermal shock resistance and low water addition , high self-flowing effect

Pending Publication Date: 2022-07-22
北京联合荣大工程材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Traditional dry-process magnesia gunning materials have problems such as high water addition, uneven mixing with water, loose material structure, and low strength; high-alumina castables are combined with bauxite aggregate and cement, and are manually used with shovels when used on site. However, due to the influence of the high-temperature furnace lining on site, the construction operation and bonding strength are not ideal; resin-bonded magnesium-carbon castables are used for grouting, which solves the difficulty of the above two repair methods. However, due to the use of organic substances such as resins as binders and the small maximum critical particle size of aggregates, there are also problems such as low strength and environmental protection caused by the reaction of organic substances.

Method used

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  • Self-flowing filling material suitable for converter body cavity lining making as well as preparation method and application of self-flowing filling material
  • Self-flowing filling material suitable for converter body cavity lining making as well as preparation method and application of self-flowing filling material
  • Self-flowing filling material suitable for converter body cavity lining making as well as preparation method and application of self-flowing filling material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] This embodiment provides a self-flowing filler suitable for lining the cavity of a converter furnace body. The composition in parts by weight is: 60 parts of sintered magnesia, 25 parts of fused magnesia, 10 parts of fused spinel powder, SiO 2 8 parts of micropowder, 0.1 part of explosion-proof fiber, 0.6 part of plasticizer carboxymethyl cellulose, and 0.15 part of polycarboxylic acid dispersant.

[0050] The maximum particle size of the self-flowing filler suitable for lining the cavity of the converter furnace body in this embodiment is 3 mm.

[0051] This embodiment is applicable to the preparation method of the self-flow filling material for lining the cavity of the converter furnace body. The components are taken according to the proportions, poured into the mixer, and stirred for 6-10 minutes until the mixture is uniform.

Embodiment 2

[0053] This embodiment provides a self-flowing filler suitable for lining the cavity of a converter furnace body, which consists of 80 parts by weight of sintered magnesia, 35 parts of fused magnesia, 15 parts of fused spinel powder, SiO 2 12 parts of micropowder, 0.15 part of explosion-proof fiber, 0.8 part of plasticizer carboxymethyl cellulose, and 0.5 part of polycarboxylic acid dispersant.

[0054] The maximum critical particle size of the self-flowing filler suitable for lining the cavity of the converter furnace body in this embodiment is 3 mm.

[0055] The preparation method of the self-flowing filler suitable for lining the cavity of the converter furnace body in this embodiment is the same as that of the embodiment 1.

Embodiment 3

[0057] The present embodiment provides a self-flowing filler suitable for lining the cavity of a converter furnace body, which is composed of parts by weight:

[0058] 50 parts of sintered magnesia, 10 parts of fused magnesia, 5 parts of fused spinel powder, SiO 2 5 parts of micropowder, 0.05 part of explosion-proof fiber, 0.1 part of plasticizer carboxymethyl cellulose, 0.1 part of polycarboxylic acid dispersant.

[0059] The maximum critical particle size of the self-flowing filler suitable for lining the cavity of the converter furnace body in this embodiment is 3 mm.

[0060] The preparation method of the self-flowing filler suitable for lining the cavity of the converter furnace body in this embodiment is the same as that of the embodiment 1.

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Abstract

The invention relates to a self-flowing filling material suitable for converter body cavity lining making and a preparation method and application thereof. The invention relates to a self-flow filling material suitable for converter body cavity lining making. The self-flow filling material comprises sintered magnesia, fused magnesia, fused spinel powder, SiO2 micro powder, explosion-proof fibers, a plasticizer carboxymethyl cellulose and a polycarboxylic acid dispersant. The filling material can realize uniform filling of the cavity of the furnace body without large-area trepanning on the furnace shell, and production can be recovered after the strength is improved through rapid sintering of the waste heat of the furnace lining.

Description

technical field [0001] The invention relates to a self-flowing filler suitable for lining a converter furnace body cavity, and a preparation method and application thereof. Background technique [0002] The converter is at the center of the steelmaking production process and is one of the main equipment of the steel plant. In recent years, with the continuous development of converter re-blowing technology and the popularization of slag splash protection technology, the quality of molten steel has been improved and the cost of steelmaking has been reduced. At the same time, the service life of the first-generation furnace has also been continuously improved. [0003] At present, the converter furnace body is mainly composed of a furnace shell and a furnace lining. The furnace shell is welded by steel structural parts, and the furnace lining is mainly composed of permanent layer, working layer and filling layer. The permanent layer is close to the furnace shell and is genera...

Claims

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Application Information

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IPC IPC(8): C04B35/80C04B35/043C04B35/636
CPCC04B35/80C04B35/043C04B35/6365C04B2235/3222C04B2235/3418C04B2235/96C04B2235/77
Inventor 董战春范垂斌吕文杰王忠元邓乐锐秦文鹏
Owner 北京联合荣大工程材料股份有限公司