A kind of converter large surface repair material and preparation method thereof

A technology for repairing materials and large surfaces, applied in the field of refractory materials, can solve the problems of long sintering time, general durability, and complicated production, and achieve the effects of short sintering time, improved high-temperature flexural strength, and good high-temperature mechanical properties.

Active Publication Date: 2020-12-29
海城利尔麦格西塔材料有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The earliest repairing material for the large surface of the converter was a magnesia dolomite mixture combined with tar or asphalt. This material is cumbersome to produce, and has a lot of smoke, a long sintering time, and general durability. Now it is gradually being eliminated.

Method used

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  • A kind of converter large surface repair material and preparation method thereof
  • A kind of converter large surface repair material and preparation method thereof
  • A kind of converter large surface repair material and preparation method thereof

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Embodiment Construction

[0025] Embodiments of the present invention are further described below:

[0026] A converter large surface repair material is prepared from the following raw materials in parts by weight:

[0027] Aggregate: 73-110 parts of dead burnt magnesia;

[0028] Ingredients: 2-5 parts of metal aluminum powder with a particle size of 200 meshes, 2-3 parts of yttrium oxide, and 3-5 parts of dicalcium silicate;

[0029] Binder: 10-15 parts of asphalt, 1-3 parts of sodium oleate, 0.5-1 part of magnesium silicate;

[0030] Additives: 1-3 parts of diesel.

[0031] A preparation method of a converter large surface repair material, the specific method is as follows:

[0032] 1) Crushing the dead-burned magnesia in the above parts by weight in a crusher to make raw materials with a particle size of 200 mesh;

[0033] 2) Premixing the prepared dead-burned magnesia with a particle size of 200 mesh and the above-mentioned parts by weight of aluminum powder, dicalcium silicate and yttrium oxid...

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Abstract

The invention discloses a large-area repairing material for a converter and a preparation method of the large-area repairing material for the converter. The preparation method comprises the following steps of sintering dead-burned magnesia with metallic aluminum powder, yttrium oxide and dicalcium silicate at a temperature of about 1550 DEG C to prepare a prefabricated preparation material with a high high-temperature mechanical property through a pre-sintering method, taking the prefabricated preparation material with different grain compositions as aggregates of the repairing material, and meanwhile taking modified asphalt prepared from asphalt, sodium oleate and magnesium silicate as a bonding agent. The large-area repairing method disclosed by the invention has the advantages that the thermal shock resistance and high temperature bending strength are effectively improved, and the chemical corrosion resistance is improved at the same time.

Description

technical field [0001] The invention relates to the field of refractory materials, in particular to a large surface repair material for a converter and a preparation method thereof. Background technique [0002] The furnace age of the converter is an important technical and economic index in the converter steelmaking, and it is an important factor for the steelmaking plant to exert its benefits. Increasing the furnace life of the converter can not only improve the production efficiency of the converter, reduce the consumption of refractory materials, ensure the operation rate of the continuous casting machine, but also give full play to the comprehensive benefits of the blast furnace, steelmaking, steel rolling and other systems. [0003] According to the characteristics of converter production and the analysis of the causes of large-scale corrosion, the properties that converter repair materials need to meet are: good high-temperature fluidity, short sintering time, high-te...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66C04B35/043C04B35/622
CPCC04B35/043C04B35/622C04B2235/3225C04B2235/3445C04B2235/3454C04B2235/402C04B2235/77C04B2235/96
Inventor 尹斌李艳丽董会彬张义先金钊王健骁
Owner 海城利尔麦格西塔材料有限公司
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