Spinel micro-powder castable for steel ladle and method for preparing prefabricated part from the castable

A spinel and castable technology, applied in the field of refractory materials, can solve problems such as difficult to meet the use requirements, restrict the service life of the ladle, and fast erosion rate, so as to improve the erosion resistance and thermal shock resistance and prolong the service life , The effect of matrix structure optimization

Inactive Publication Date: 2020-05-22
北京利尔高温材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ordinary corundum-spinel ladle materials are difficult to meet the requirements of use. Poor thermal shock p

Method used

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Experimental program
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Example Embodiment

[0035] The present invention also provides a method for preparing a preform, including the following steps:

[0036] Mixing the components and water to obtain a mixture;

[0037] Molding the obtained mixture to obtain a molding material;

[0038] The molding material is cured to obtain the preform.

[0039] In the present invention, the mass ratio of the water to each component is 5-7:100, more preferably 6:100.

[0040] In the present invention, the mixing time of the components and water is preferably 2 to 4 minutes.

[0041] In the present invention, the molding is preferably vibration casting molding, and the frequency of the vibration is preferably 2800-2900 times / min, more preferably 2860 times / min; the amplitude is preferably 0.3-0.6mm, more preferably 0.4-0.5mm The motor power is preferably 1.4 to 1.6 kilowatts, 370 to 390V, more preferably 1.5 kilowatts, 380V; the vibration time is preferably 3 to 5 minutes, and more preferably 4 minutes.

[0042] In the present invention, the c...

Example Embodiment

[0046] Example 1

[0047] Take 12.5 parts of platy corundum particles with a particle size of 3~5mm, 20 parts of platy corundum particles with a particle size of 5~8mm, 17.5 parts of fused magnesia-aluminum spinel particles with a particle size of ≤1mm, and 20 parts with a particle size of 1~3mm white corundum particles, 5 parts of white corundum fine powder with a particle size of 180 mesh, 5 parts of white corundum fine powder with a particle size of 320 mesh, 5 parts of α-Al with a particle size of 1μm 2 O 3 Micro powder, 3 parts of α-Al with a particle size of 3μm 2 O 3 Micropowder, 4 parts of sintered spinel powder with a particle size of 500 mesh, 5 parts of cement, 1 part of steel fiber and 2 parts of admixtures. The admixtures include alumina superfine powder water reducing agent, metal aluminum powder explosion-proof agent, and pure alumina Salt cement accelerator, the ratio is 0.8:0.12:0.04. Dry mix the above components for 3 minutes, add 6wt% water and stir for 5 minut...

Example Embodiment

[0049] Example 2

[0050] Take 12.5 parts of platy corundum particles with a particle size of 3~5mm, 20 parts of platy corundum particles with a particle size of 5~8mm, 17.5 parts of fused magnesia-aluminum spinel particles with a particle size of ≤1mm, and 20 parts with a particle size of 1~3mm white corundum particles, 5 parts of white corundum fine powder with a particle size of 180 mesh, 5 parts of white corundum fine powder with a particle size of 320 mesh, 5 parts of α-Al with a particle size of 1μm 2 O 3 Micro powder, 3 parts of α-Al with a particle size of 3μm 2 O 3 Micropowder, 4 parts of sintered spinel powder with a particle size of 500 mesh, 5 parts of cement, 1 part of steel fiber and 2 parts of admixtures. The admixtures include alumina superfine powder water reducing agent, metal aluminum powder explosion-proof agent, and pure alumina Salt cement accelerator, the ratio is 0.8:0.12:0.04. Dry mix the above components for 3 minutes, add 6wt% water and stir for 5 minut...

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Abstract

The invention relates to the technical field of refractory materials, and provides a spinel micro-powder castable for a steel ladle and a method for preparing a prefabricated part from the castable. The spinel micro-powder castable for the steel ladle is prepared from the following components in parts by mass: 25-40 parts of tabular corundum particles, 15-25 parts of white corundum particles, 15-20 parts of fused magnesia-alumina spinel particles, 8-12 parts of white corundum fine powder, 6-10 parts of alpha-Al2O3 micro powder, 3-5 parts of sintered spinel micro powder, 6-7 parts of cement, 1-2 parts of steel fibers and 1-3 parts of additives. Through the sintered spinel micro powder, the castable is more compact, the porosity is reduced, the pore diameter is reduced, and meanwhile, the generation of calcium hexaluminate (CA6) is promoted, so that the matrix structure is optimized. The castable has high normal-temperature strength and high-temperature strength and excellent high-temperature breaking strength, slag corrosion resistance and thermal shock resistance, and the service life of a steel ladle material is effectively prolonged.

Description

technical field [0001] The invention relates to the technical field of refractory materials, in particular to a spinel micropowder casting material for a ladle and a method for preparing a prefabricated part from the casting material. Background technique [0002] Traditional corundum-based ladle materials generally have a low service life. According to analysis, the main reasons for the damage of ladle materials are the erosion, erosion and thermal shock damage of molten steel, while corundum-spinel has excellent high-temperature mechanical properties and heat resistance. It has been widely used in refining ladles due to its good shock resistance and slag resistance. In recent years, with the substantial increase in the proportion of electric heating and vacuum refining, the demand for smelted clean steel and high-standard steel has increased year by year. At the same time, higher requirements have been put forward for the ladle refining process of steelmaking plants. Elem...

Claims

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Application Information

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IPC IPC(8): C04B35/66
CPCC04B35/66C04B2235/3217C04B2235/3222C04B2235/5216
Inventor 耿鹏王团收任林赵现华张盛李健高梅刘美荣
Owner 北京利尔高温材料股份有限公司
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