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Wear-resistant and thermal shock-resistant lining for air supply branch pipe of iron-making blast furnace and preparation method thereof

An ironmaking blast furnace and thermal shock resistance technology, applied in the field of refractory materials, can solve problems such as poor high temperature performance, achieve good cohesion performance, improve high temperature mechanical properties, and compensate for volume shrinkage

Active Publication Date: 2015-02-18
ZHENGZHOU ANNEC IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the defect of poor high-temperature performance in the refractory lining of the traditional air supply branch pipe, and provide a wear-resistant and thermal shock-resistant lining for the air supply branch pipe of the ironmaking blast furnace and its preparation method, which can Make the blast furnace air supply branch pipe meet the working conditions of high wear resistance and thermal shock resistance under the condition of high wind temperature and pressure

Method used

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  • Wear-resistant and thermal shock-resistant lining for air supply branch pipe of iron-making blast furnace and preparation method thereof

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Effect test

Embodiment 1

[0020] The wear-resistant and thermal-shock-resistant inner lining used for the air supply branch pipe of ironmaking blast furnace is composed of matrix, aggregate, explosion-proof fiber, binder and dispersant. The weight percentage of each material to the total weight of raw materials is: matrix 31.85% , 65% of aggregate, 0.05% of explosion-proof fiber, 3% of binder and 0.1% of sodium tripolyphosphate; wherein, the matrix is ​​composed of 9.85% andalusite fine powder of 200 mesh particle size grade, 9.88% of 300 mesh particle size grade fine corundum powder, 4.78% α-Al 2 o 3 Micronized powder and 7.34% SiO 2 Micropowder composition; The aggregate is composed of 16.25% clay clinker particles of 8~5mm particle size grade, 19.5% clay clinker particles of 5~3mm particle size grade, 13% andalusite particles of 3~1mm particle size grade and 16.25% of andalusite particles with a particle size of 1 to 0.074mm; the binder consists of 1.95% pure calcium aluminate cement and 1.05% ρ-A...

Embodiment 2

[0024] It is used for wear-resistant and thermal-shock-resistant inner lining of blast furnace air supply branch pipe. Its raw materials are composed of matrix, aggregate, explosion-proof fiber, binder and dispersant. The weight percentage of each material to the total weight of raw materials is: matrix 20.65% , 72% of aggregate, 0.15% of explosion-proof fiber, 7% of binder and 0.2% of dispersant; wherein, the matrix is ​​composed of 6.25% andalusite fine powder of 200 mesh particle size grade, 11.05% of 300 mesh particle size grade of corundum Fine powder, 6.05% α-Al 2 o 3 Micronized powder and 8.5% SiO 2 Micropowder composition; The aggregate is composed of 16.25% clay clinker particles of 8~5mm particle size grades, 16.25% clay clinker particles of 5~3mm particle size grades, 14.3% andalusite particles of 3~1mm particle size grades and 18.2% of 1 ~ 0.074mm particle size andalusite particles; the binder consists of 3.85% pure calcium aluminate cement and 3.15% ρ-Al 2 o 3...

Embodiment 3

[0027] The wear-resistant and thermal-shock-resistant inner lining used for the air supply branch pipe of ironmaking blast furnace is composed of matrix, aggregate, explosion-proof fiber, binder and dispersant. The weight percentage of each material to the total weight of raw materials is: matrix 26.25% , 68.5% of aggregate, 0.1% of explosion-proof fiber, 5% of binder and 0.15% of sodium hexametaphosphate; wherein, the matrix is ​​composed of 6.56% of andalusite fine powder of 200 mesh particle size grade, 8.66% of 300 mesh particle size grade Corundum fine powder, 4.46% α-Al 2 o 3 Micronized powder and 6.57% SiO 2 Micropowder composition; The aggregate is composed of 21.2% clay clinker particles of 8~5mm particle size grade, 21.2% clay clinker particles of 5~3mm particle size grade, 11.65% andalusite particles of 3~1mm particle size grade and 14.45% of 1 ~ 0.074mm particle size andalusite particles; the binder consists of 3% pure calcium aluminate cement and 2% ρ-Al 2 o 3...

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Abstract

The invention relates to a wear-resistant and thermal shock-resistant lining for an air supply branch pipe of an iron-making blast furnace and a preparation method thereof. The wear-resistant and thermal shock-resistant lining comprises the following raw materials in percentage by weight: 20.65-31.85 percent of substrate, 65-72 percent of aggregate, 0.05-0.15 percent of explosion-proof fiber, 3-7 percent of a bonding agent and 0.1-0.2 percent of a dispersing agent. The preparation method of the wear-resistant and thermal shock-resistant lining comprises the following steps: mixing the raw materials with a certain weight of water into pouring material; after pouring, curing and carrying out thermal treatment to prepare the lining for the air supply branch pipe. In the wear-resistant and thermal shock-resistant lining, the substrate is composed of andalusite fine powder with 200 meshes, corundum fine powder, alpha-Al2O3 micro powder and SiO2 micro powder; the aggregate is composed of clay clinker particle and andalusite particle with a grain size grade of 3-0.074 mesh. The wear-resistant and thermal shock-resistant lining and the preparation method thereof have the benefits that in the use process, mullite converted from the andalusite can form a weaving structure with the other raw materials and can play bridging and toughening roles, so that the thermal shock resistance of raw material products is improved; the expansion effect of the mullite is durable, the volume stability is good, and the service life of the lining is long.

Description

technical field [0001] The invention relates to the technical field of refractory materials, in particular to a wear-resistant and thermal-shock-resistant inner lining for an ironmaking blast furnace air supply branch pipe and a preparation method thereof. Background technique [0002] The air supply device of the ironmaking blast furnace is the so-called air supply branch pipe. It is a crucial component of the blast furnace front equipment and a weak link in the hot blast stove piping system. It is the key to determine whether the blast furnace can be produced normally. At present, domestic blast furnaces generally have many disadvantages such as high surface temperature, redness, short service life and excessive heat loss due to air leakage. The service life is generally within one year, which does not match the hot blast furnace with a service life of 20 to 30 years. , it is difficult to meet the requirements of blast furnace smelting for the use of air supply devices; mo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
Inventor 李富朝孙庚辰张玉涛樊旭光
Owner ZHENGZHOU ANNEC IND
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