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Anti-corrosion compact checker brick for upper part of coke oven regenerative chamber and preparation method thereof

A technology of compact checker bricks, applied in the field of coking, can solve the problems of high impurity content of semi-silica bricks, poor high temperature resistance, poor corrosion resistance, etc., achieve high softening temperature under load, reduce production costs, and high temperature pressure creep Excellent effect

Pending Publication Date: 2021-02-09
SHANDONG REFRACTORIES GRP LUNAI KILN REFRACTORYCO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the defects of common clay bricks and semi-silica bricks in coke ovens with high impurity content, high porosity, poor corrosion resistance, poor high temperature resistance, and short service life.
The invention provides an anti-alteration dense checker brick and a preparation method thereof. The product has the characteristics of low porosity, high strength, stable structure at high temperature, high softening temperature under load, excellent creep property under high temperature pressure, and good CO erosion resistance effect. , solve problems such as grid hole blockage, softening and collapse, improve coke quality, increase service life, reduce enterprise operating costs, and meet the high temperature requirements of the top of large-scale coke oven regenerators. It is a replacement material for a new generation of coke oven regenerators

Method used

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  • Anti-corrosion compact checker brick for upper part of coke oven regenerative chamber and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0026] An anti-alteration dense checker brick for the upper part of a coke oven regenerator, which is composed of the following raw materials in parts by weight:

[0027] 25 parts of low-alumina mullite particles with a particle size of 0.1mm, 15 parts of andalusite, 4 parts of high-temperature alumina micropowder with a particle size of 0.003mm, 10 parts of high-purity kaolin fine powder with a particle size of 0.074mm, and clay with a particle size of 0.045mm 10 parts, 5 parts of dextrin solution.

[0028] The preparation method of the anti-alteration dense checker brick, (1) first mix andalusite fine powder, alumina fine powder, kaolin fine powder and clay evenly to make a mixed powder; mix low-aluminum mullite particles and andalusite particles Evenly, then add the binder and mix for 2 minutes; finally add the mixed powder and mix for 5 minutes, and the effective mixing time is 10 minutes to obtain a uniformly mixed mud;

[0029] (2) Use an inclined high-speed mixer for m...

Embodiment 2

[0031] An anti-alteration dense checker brick for the upper part of a coke oven regenerator, which is composed of the following raw materials in parts by weight:

[0032] 60 parts of low-alumina mullite particles with a particle size of 3 mm, 25 parts of andalusite, 6 parts of high-temperature alumina micropowder with a particle size of 0.003 mm, 15 parts of high-purity kaolin fine powder with a particle size of 0.074 mm, and 15 parts of clay with a particle size of 0.045 mm Parts, 6 parts of dextrin solution.

[0033] The preparation method of the anti-alteration dense checker brick, (1) first mix andalusite fine powder, alumina fine powder, kaolin fine powder and clay evenly to make a mixed powder; mix low-alumina mullite particles, red Mix the pillar stone particles evenly, then add the binder, and mix for 3 minutes; finally add the mixed powder, mix for 7 minutes, and the effective mixing time is 10 minutes to obtain a uniformly mixed mud;

[0034] (2) Use an inclined hig...

Embodiment 3

[0036] An anti-alteration dense checker brick for the upper part of a coke oven regenerator, which is composed of the following raw materials in parts by weight:

[0037] 40 parts of low-alumina mullite particles with a particle size of 1 mm, 20 parts of andalusite, 5 parts of high-temperature alumina micropowder with a particle size of 0.003 mm, 12 parts of high-purity kaolin fine powder with a particle size of 0.074 mm, and 13 parts of clay with a particle size of 0.045 mm Parts, 5.5 parts of dextrin solution.

[0038] The preparation method of the anti-alteration dense checker brick, (1) first mix andalusite fine powder, alumina fine powder, kaolin fine powder and clay evenly to make a mixed powder; mix low-alumina mullite particles, red Mix the pillar stone particles evenly, then add the binder, and mix for 2.5 minutes; finally add the mixed powder, mix for 6 minutes, and the effective mixing time is 10 minutes to obtain a uniformly mixed mud;

[0039] (2) Use an inclined...

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Abstract

The invention relates to an anti-corrosion compact checker brick for the upper part of a coke oven regenerative chamber and a preparation method of the anti-corrosion compact checker brick. The anti-corrosion compact checker brick is prepared from the following raw materials in parts by weight: 25-60 parts of low-aluminum mullite particles, 15-25 parts of andalusite, 4-6 parts of high-temperaturealuminum oxide micro powder, 10-15 parts of high-purity kaolin fine powder, 10-15 parts of clay and 5-6 parts of a binder. The anti-corrosion compact checker brick has the characteristics of low porosity, high strength, stable high-temperature structure, high refractoriness under load, excellent high-temperature creep resistance, good CO corrosion resistance and the like, solves the problems of checker hole blockage and softening collapse of the coke oven checker brick in the use process, has the performance superior to that of common clay and semi-silicon checker bricks, and can meet the high-temperature requirement of the top of a large coke oven regenerative chamber.

Description

technical field [0001] The invention relates to an anti-alteration dense checker brick for the upper part of a coke oven regenerator and a preparation method thereof, which are applied in the field of coking. Background technique [0002] The 7.63m coke oven of a domestic steel plant is a super-large coke oven imported from Germany. The regenerator adopts a grid design, and the air and gas are regulated through the injection plate at the lower part of the regenerator. The checker bricks of the regenerator are made of clay and semi-silicon Quality, divided into several layers of staggered masonry. However, in use, some clay and semi-silicon checker bricks foamed or deformed severely after use, especially the 6-layer checker bricks on the top of the coke oven, which appeared soft and melted, grid holes were blocked, and multi-layer checker bricks were bonded together. As a result, the resistance of the regenerator increases, and the gas delivery volume is insufficient, result...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/185C04B35/622C04B35/66C10B29/00
CPCC04B35/185C04B35/622C04B35/66C10B29/00C04B2235/3217C04B2235/349C04B2235/3463C04B2235/5427C04B2235/5436C04B2235/656C04B2235/77C04B2235/96C04B2235/9607C04B2235/9615C04B2235/9669
Inventor 王明刚高蕊王佑宝李志杰宗雷徐广忠韩文佳王成杰王文学蔡国庆王希波
Owner SHANDONG REFRACTORIES GRP LUNAI KILN REFRACTORYCO
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