Soaking-salt sintered magnesium aluminate spinel brick for RH furnace and production method of soaking-salt sintered magnesium aluminate spinel brick for RH furnace

A magnesia-alumina spinel brick and a production method technology, applied in the field of refractory materials, can solve problems such as slag erosion in a RH vacuum refining furnace, and achieve the effects of lowering temperature, lowering porosity, and lowering costs

Inactive Publication Date: 2017-07-25
海城利尔麦格西塔材料有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a magnesia-alumina spinel brick for RH furnace and its production

Method used

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  • Soaking-salt sintered magnesium aluminate spinel brick for RH furnace and production method of soaking-salt sintered magnesium aluminate spinel brick for RH furnace
  • Soaking-salt sintered magnesium aluminate spinel brick for RH furnace and production method of soaking-salt sintered magnesium aluminate spinel brick for RH furnace
  • Soaking-salt sintered magnesium aluminate spinel brick for RH furnace and production method of soaking-salt sintered magnesium aluminate spinel brick for RH furnace

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[0016] In the following, the present invention will be further described in conjunction with the embodiments:

[0017] The following examples describe the present invention in detail. These examples only describe the best embodiments of the present invention, and do not limit the scope of the present invention.

[0018] Examples 1-3 are given below. The formula for sintering magnesia-aluminum spinel bricks with RH furnace using salt immersion is shown in Table 1:

[0019] Table 1 Example 1-3 Use magnesia-carbon residual brick as the main raw material to make the formula of gunning material

[0020]

[0021] In the above formula, the 97 high-purity magnesia, 97 fused magnesia, fused magnesia aluminum spinel and calcined Al 2 O 3 All are commercially available raw materials. The magnesia is required to have a high content of magnesia, and the content of alumina in the fused magnesia alumina spinel should be greater than 65%.

[0022] The main raw material indicators are shown in Table 2...

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Abstract

The invention relates to a soaking-salt sintered magnesium aluminate spinel brick for an RH furnace. Physicochemical indexes of the soaking-salt sintered magnesium aluminate spinel brick are as follows: MgO is larger than or equal to 86 percent, Al2O3 is larger than or equal to 10 percent, SiO2 is smaller than or equal to 0.74 percent, the compressive strength is larger than or equal to 108.4MPa, the apparent porosity is smaller than or equal to 13.0, the volume density is larger than or equal to 3.03g/cm<3>, and the water cooling and thermal shock stability at the temperature of 1100 DEG C is larger than or equal to 13. The soaking-salt sintered magnesium aluminate spinel brick is prepared from the following raw materials in parts by weight: 20-35 parts of 200-mesh 97 high-purity magnesia, 15-25 parts of 0-1mm 97 high-purity magnesia, 10-15 parts of 1-3mm 97 high-purity magnesia, 10-15 parts of 0-1mm 97 fused magnesia, 10-15 parts of 1-3mm 97 fused magnesia, 10-15 parts of 1-3mm 97 fused magnesium aluminate spinel, 3-5 parts of calcined Al2O3 micropowder and 3-5 parts of a binder paper pulp. After being sintered, the soaking-salt sintered magnesium aluminate spinel brick for the RH furnace is subjected to vacuum soaking-salt with an industrial salt solution, so that the porosity of the magnesium aluminate spinel brick is improved, and the problem of slag corrosion of an RH vacuum refining furnace is solved.

Description

technical field [0001] The invention relates to the field of refractory materials, in particular to a magnesia-aluminum spinel brick used for RH furnaces and a production method thereof. Background technique [0002] RH furnace is the main out-of-furnace refining equipment for producing high-quality steel. With the development of the steel industry and the expansion of living needs, the demand for high value-added products continues to increase, and the production load of the RH vacuum refining furnace has been increasing. Due to the continuous improvement of equipment functions, the performance of refractory materials has also been improved. high demands. The refractory material of RH vacuum refining furnace is required to have excellent resistance to molten steel and molten steel due to the severe erosion of high-temperature molten steel, the melting erosion of slag and molten steel, and the intense thermal shock damage process of intermittent treatment of molten steel. ...

Claims

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Application Information

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IPC IPC(8): C04B35/043C04B35/626
CPCC04B35/043C04B35/62605C04B2235/3217C04B2235/3222C04B2235/444C04B2235/77C04B2235/96
Inventor 赵东辉王新杰张义先尹斌金钊王健骁
Owner 海城利尔麦格西塔材料有限公司
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