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Preparation method of low-zirconium mullite cast steel brick

A technology of zirconium mullite and fused mullite is applied in the field of preparation of low zirconium mullite cast steel bricks, which can solve the problem of shortening the service life of the nuclear power industry, easy occurrence of inclusions in refractory materials, easy falling off of large steel ingots, etc. problems, to achieve the effect of good thermal shock stability, non-oxidizing high-temperature chemical properties, and high softening temperature under load

Active Publication Date: 2015-03-04
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

Nuclear power steel ingots are usually more than 50 tons of steel ingots used for forging and rolling of nuclear power products. The difficulty of successful casting is that huge static pressure will be generated during the pouring process, and inclusions are likely to be generated after the molten steel washes the refractory materials, reducing the risk of large steel ingots. The purity of the large steel ingot will affect the quality of the large steel ingot, shorten its service life in the nuclear power industry, and even pose a safety hazard
[0004] In order to improve the purity of large steel ingots, it is necessary for pouring steel bricks to have good erosion resistance, thermal stability, high temperature resistance, and pressure resistance, etc., but the current pouring steel bricks cannot meet this requirement, and it is easy to fall off, reduce the purity of large steel ingots, and limit 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

[0025] A method for preparing low-zircon mullite cast steel bricks, comprising the following contents:

[0026] a. By weight, 50 parts of fused mullite; 20 parts of zirconia; 20 parts of andalusite; 3 parts of kyanite are mixed and pulverized or mixed in proportion after pulverized to obtain mixed particles; The mixed particles are, by weight percentage, particles with a particle size of 200 mesh accounting for 56%, particles with a particle size of 1-3mm accounting for 34%, and particles with a particle size of 3-5mm accounting for 10%;

[0027] b. Grinding Guangxi white clay and lignin into 200 mesh fine powder respectively;

[0028] c. 93 parts of mixed particles obtained in step a, 5 parts of Guangxi white mud fine powder obtained in step b, and 2 parts of lignin are mixed in proportion, and the lignin is 1.22 ~ 1.25g / cm2 in density. 3 The mode of lignin aqueous solution is mixed, obtains mixed raw material;

[0029] d. pressing the mixed raw materials i...

Embodiment 2

[0034] A method for preparing low-zircon mullite cast steel bricks, comprising the following contents:

[0035] a. By weight, 50 parts of fused mullite; 20 parts of zirconia; 20 parts of andalusite; 3 parts of kyanite are mixed and pulverized or mixed in proportion after pulverized to obtain mixed particles; The mixed particles are, by weight percentage, particles with a particle size of 200 mesh accounting for 60%, particles with a particle size of 1-3mm accounting for 30%, and particles with a particle size of 3-5mm accounting for 10%;

[0036] b. Grinding Guangxi white clay and lignin into 200 mesh fine powder respectively;

[0037] c. 93 parts of mixed particles obtained in step a, 5 parts of Guangxi white mud fine powder obtained in step b, and 2 parts of lignin are mixed in proportion, and the lignin is 1.22 ~ 1.25g / cm2 in density. 3 The mode of lignin aqueous solution is mixed, obtains mixed raw material;

[0038] d. pressing the mixed raw materials...

Embodiment 3

[0043] A method for preparing low-zircon mullite cast steel bricks, comprising the following contents:

[0044] a. By weight, 50 parts of fused mullite; 20 parts of zirconia; 20 parts of andalusite; 3 parts of kyanite are mixed and pulverized or mixed in proportion after pulverized to obtain mixed particles; The mixed particles are, by weight percentage, particles with a particle size of 200 mesh accounting for 50%, particles with a particle size of 1-3mm accounting for 40%, and particles with a particle size of 3-5mm accounting for 10%;

[0045] b. Grinding Guangxi white clay and lignin into 200 mesh fine powder respectively;

[0046] c. 93 parts of mixed particles obtained in step a, 5 parts of Guangxi white mud fine powder obtained in step b, and 2 parts of lignin are mixed in proportion, and the lignin is 1.22 ~ 1.25g / cm2 in density. 3 The mode of lignin aqueous solution is mixed, obtains mixed raw material;

[0047] d. pressing the mixed raw material...

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Abstract

The invention relates to a preparation method of a low-zirconium mullite cast steel brick, and belongs to the field of preparation of refractory materials. The raw material formula of the low-zirconium mullite cast steel brick provided by the invention comprises electrically smelted mullite, zirconium oxide, Guangxi white clay, andalusite, kyanite and lignin. According to the method provided by the invention, type and grain size of the raw materials are selected to be matched with the sintering temperature and time provided by the invention, so that the prepared low-zirconium mullite cast steel brick has the characteristics of excellent scouring resistance, high temperature resistance, small creep deformation, high compression strength, good thermal stability and the like, and is suitable for being used in large steel ingot casting in nuclear power products.

Description

technical field [0001] The invention belongs to the field of preparation of refractory materials, and in particular relates to a preparation method of low-zirconium mullite cast steel bricks. 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 diversifi...

Claims

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Application Information

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Patent Type & Authority Patents(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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