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Low-carbon corundum spinelle brick for refined steel ladles and preparation method thereof

The technology of spinel brick and carbon corundum is applied in the field of low-carbon corundum spinel brick for refining ladle and its preparation, which can solve the problem of high carbon content of carbon-containing refractory materials, and achieve the purpose of preventing oxidation, improving thermal shock stability, Good absorption and dissipation of elastic strain energy

Active Publication Date: 2009-12-30
海城利尔麦格西塔材料有限公司 +2
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  • Abstract
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Problems solved by technology

[0004] The present invention aims at the problem that the carbon content of carbon-containing refractories in the prior art is too high, and provides a low-carbon corundum spinel brick for refining ladles

Method used

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  • Low-carbon corundum spinelle brick for refined steel ladles and preparation method thereof
  • Low-carbon corundum spinelle brick for refined steel ladles and preparation method thereof

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Embodiment Construction

[0020] The grain type and the percentage of the batching that each embodiment of the present invention adopts are as shown in the following table:

[0021]

[0022] The technological processes of the three embodiments of the present invention are shown in the accompanying drawings, and the mixing equipment is a high-speed mixing mill. After turning on the machine, first add granular aggregate 1 and dry mix for 3 minutes, then slowly add binder 2 and mix for 5 minutes within 2 minutes, then add ultra-fine graphite 3 and mix for 5 minutes. There is no large amount of graphite flying, and finally add all Co-grinding powder 4 was mixed for 30 minutes and discharged. The discharge temperature is 50-60°C; the semi-finished product is formed on a 630-ton brick press. The forming operation should follow the principle of picking materials at the four corners, light first and then heavy. Then dry and heat treatment for more than 24 hours, wherein the temperature at the kiln entranc...

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Abstract

The invention relates to a low-carbon corundum spinelle brick for refined steel ladles and a preparation method thereof for overcoming the defect of overhigh carbon content in the prior carbon-contained fireproof material technology. The low-carbon corundum spinelle brick for refined steel ladles comprises the following components in percentage by weight: 60-70 fused corundum particles, 2-6 fused magnesite particles, 10-20 fused corundum fine powder, 2-10 fused magnesite fine powder, 5-15 fused spinelle fine powder, 3-6 alpha-Al2O3 micro powder, 0-2.0 metal aluminum fine powder, 0-2.0 metal silicon fine powder, 2-6 bond, 1-2 superfine graphite and 2-6 titanium white powder. The invention has good thermal stability at high temperature, resists high temperature and the erosion of molten steel and slag and has high mechanical strength, good thermal shock stability and high under-load softening point, thereby being widely applied to various steel ladles, in particular to steel ladles of refined low-carbon steel and ultra-low-carbon steel.

Description

technical field [0001] The invention relates to a refractory material, in particular to a low-carbon corundum spinel brick for refining ladles and a preparation method thereof. Background technique [0002] From the 1950s to the 1970s, aluminum silicate refractory materials were mainly used for ladle lining in my country, including various clay bricks, high-alumina bricks and high-alumina ramming materials, but the service life was short. Since the 1980s, my country's steelmaking industry has entered a stage of rapid development. With the development of refining technology outside the furnace, the use of carbon-containing refractory materials in the lining of iron and steel smelting furnaces has achieved great success. Carbon-containing refractories have very good corrosion resistance and thermal stability, and are now successfully used in converters, electric furnaces, ladle linings and slag lines. [0003] However, carbon content is generally high in carbon-containing ref...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
Inventor 刘全超刘靖轩余西平赵继增徐延庆丰文祥谭兴无曹仁峰周磊刘丽张晓波任林张艳凤
Owner 海城利尔麦格西塔材料有限公司
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