Low-zirconium mullite draft tube brick and preparation method thereof

A zirconium-mullite and diversion tube technology, applied in the field of low-zirconium mullite diversion tube bricks and its preparation, can solve the problems of shortening the service life of the nuclear power industry, reducing the purity of large steel ingots, and easy falling off of large steel ingots , to achieve the effects of good thermal shock stability, non-oxidative high-temperature chemical properties, and high softening temperature under load

Active Publication Date: 2014-07-16
四川锦圆耐材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The diversion pipe is in direct contact with the molten steel during the pouring process. After the molten steel passes through the diversion pipe and enters the ingot, there is little chance of the inclusions floating up. Therefore, the erosion resistance of the diversion pipe brick directly affects the internal quality of the molten steel and the quality of the ingot. , shorten its service life in the nuclear power industry, and even have potential safety hazards
[0005] In order to improve the purity of steel ingots, the duct bricks are required to have good erosion resistance, thermal stability, high temperature resistance, etc., but the current duct bricks cannot meet this requirement, and they are easy to fall off when pouring large steel ingots, reducing the The purity of large steel ingots limits the use of large steel ingots in the nuclear power industry

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A low-zirconia mullite duct brick, which is composed of the following raw materials in parts by weight: fused mullite: 50 parts; zirconia: 20 parts; Guangxi white clay: 5 parts; andalusite: 20 parts; kyanite Stone: 3 parts; Lignin: 2 parts.

[0025] The preparation method of this low-zircon mullite duct brick is as follows:

[0026] a. Mix fused mullite, zirconia, andalusite and kyanite in proportion and then pulverize or mix in proportion after pulverization to obtain mixed particles. The mixed particles are, by weight percentage, with a particle size of 200 mesh Particles account for 50~60%, particles with a particle size of 1~3mm account for 30~40%, particles with a particle size of 3~5mm account for 5~10%;

[0027] b. Grind the mixed particles obtained in step a into 200 mesh Guangxi white clay and have a density of 1.22~1.25g / cm 3 The lignin aqueous solution is mixed in proportion to obtain a mixed raw material;

[0028] c. pressing the mixed raw mat...

Embodiment 2

[0033] A low-zirconia mullite duct brick, which is composed of the following raw materials in parts by weight: fused mullite: 45 parts; zirconia: 15 parts; Guangxi white clay: 8 parts; andalusite: 25 parts; kyanite Stone: 2 parts; Lignin: 5 parts.

[0034] The preparation method of this low-zircon mullite duct brick is as follows:

[0035] a. Mix fused mullite, zirconia, andalusite and kyanite in proportion and then pulverize or mix in proportion after pulverization to obtain mixed particles. The mixed particles are, by weight percentage, with a particle size of 200 mesh 60% of particles, 30% of particles with a particle size of 1~3mm, and 10% of particles with a particle size of 3~5mm;

[0036] b. Grind the mixed particles obtained in step a into 200 mesh Guangxi white clay and have a density of 1.22~1.25g / cm 3 The lignin aqueous solution is mixed in proportion to obtain a mixed raw material;

[0037] c. pressing the mixed raw material in step b into adobe;

...

Embodiment 3

[0042] A low-zirconia mullite duct brick, which is composed of the following raw materials in parts by weight: fused mullite: 55 parts; zirconia: 15 parts; Guangxi white clay: 3 parts; andalusite: 20 parts; kyanite Stone: 5 parts; Lignin: 2 parts.

[0043] The preparation method of this low-zircon mullite duct brick is as follows:

[0044] a. Mix fused mullite, zirconia, andalusite and kyanite in proportion and then pulverize or mix in proportion after pulverization to obtain mixed particles. The mixed particles are, by weight percentage, with a particle size of 200 mesh 50% of particles, 40% of particles with a particle size of 1~3mm, and 10% of particles with a particle size of 3~5mm;

[0045] b. Grind the mixed particles obtained in step a into 200 mesh Guangxi white clay and have a density of 1.22~1.25g / cm 3 The lignin aqueous solution is mixed in proportion to obtain a mixed raw material;

[0046] c. pressing the mixed raw material in step b into adobe;

...

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Abstract

The invention relates to a low-zirconium mullite draft tube brick and a preparation method thereof, belonging to the field of refractory materials. The low-zirconium mullite draft tube brick comprises the following raw materials by weight: 45 to 55 parts of fused mullite, 15 to 25 parts of zirconia, 3 to 8 parts of Guangxi white mud, 15 to 25 parts of andalusite, 2 to 5 parts of kyanite and 1 to 5 parts of lignin. According to the invention, through selection of types and particle sizes of the raw materials and cooperative usage of sintering temperature and time provided by the invention, the prepared draft tube brick has the characteristics of excellent anti-scouring performance and high temperature resistance, small creep deformation, good thermal stability, etc. and is applicable to vacuum casting of large steel ingots in a nuclear power product.

Description

technical field [0001] The invention belongs to the field of refractory materials, and in particular relates to a low-zircon mullite duct brick and a preparation method thereof. Background technique [0002] For a long time, the coal-based energy structure has not only been unable to adapt to the rapid economic development, but also caused serious social energy and environmental problems. In terms of energy, coal can be used by human beings for 200 to 220 years, and it is self-evident that human beings are facing a severe situation of coal depletion; in terms of environment, burning various fossil fuels will emit a large amount of carbon into the atmosphere Harmful gases such as greenhouse gases carbon dioxide, sulfur oxides, and nitrogen oxides, as well as a large amount of smoke and dust, have caused extremely serious damage to the environment. Therefore, it is necessary for us to actively improve the structure of energy utilization and realize the diversified supply of e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
Inventor 宋政德
Owner 四川锦圆耐材有限公司
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