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High-performance electric furnace cover

An electric furnace cover, high-performance technology, applied in the field of refractory materials, can solve the problems of poor shaping, high rigidity and high brittleness of corundum, etc., and achieve the effects of increasing service life, high thermal shock resistance, and improving corrosion resistance

Inactive Publication Date: 2017-09-15
嘉兴新耐建材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention proposes a high-performance electric furnace cover, which aims to provide a solution to the defects of traditional corundum, such as high rigidity, high brittleness, and poor shaping, and provide a high-performance corundum with good corrosion resistance, good shaping, good thermal shock resistance, and high density. Corundum electric furnace cover with long service life and good corrosion resistance and preparation method thereof

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Zirconium corundum 30%, tabular corundum particles 25%, fused mullite particles 12%, sillimanite particles 3%, zinc chromium spinel powder 8%, calcium aluminate cement 8%, α-Al 2 O 3 Micro powder 3%, Fe 3 Si powder is 5%, β-sialon powder is 6%, and additives are 0.4%.

[0021] Weigh each component according to the above weight ratio, firstly mix the zinc-chromium spinel powder, calcium aluminate cement, α-Al 2 O 3 Micro powder, Fe 3 Si powder and β-Sialon powder are made into co-milled powder; during production, add tabular corundum particles, fused mullite particles, sillimanite particles to the co-milled powder, stir and mix for 2 minutes and then add other remaining raw materials , After stirring for 6 minutes, the premix is ​​obtained; adding an appropriate amount of water, stirring for 3 minutes, then pouring and molding, and after natural curing, it can be demoulded and dried.

[0022] Preferably, demold after natural curing for 1 day, and continue curing for 3 days aft...

Embodiment 2

[0024] Zirconium corundum 33%, tabular corundum particles 22%, fused mullite particles 12%, sillimanite particles 3%, zinc chromium spinel powder 8%, calcium aluminate cement 8%, α-Al 2 O 3 Micro powder 3%, Fe 3 Si powder 6%, β-Sialon powder 5%, admixture 0.5%.

[0025] Weigh each component according to the above weight ratio, firstly mix the zinc-chromium spinel powder, calcium aluminate cement, α-Al 2 O 3 Micro powder, Fe 3 Si powder and β-Sialon powder are made into co-milled powder; during production, add tabular corundum particles, fused mullite particles, sillimanite particles to the co-milled powder, stir and mix for 2 minutes and then add other remaining raw materials , After stirring for 6 minutes, the premix is ​​obtained; adding an appropriate amount of water, stirring for 3 minutes, then pouring and molding, and after natural curing, it can be demoulded and dried.

[0026] Preferably, it is demoulded after natural curing for 1 day, and curing is continued for 3 days afte...

Embodiment 3

[0028] Zirconium corundum 27%, tabular corundum particles 25%, fused mullite particles 12%, sillimanite particles 3%, zinc chromium spinel powder 8%, calcium aluminate cement 8%, α-Al 2 O 3 Micro powder 3%, Fe 3 Si powder is 8%, β-sialon powder is 6%, and additive is 0.6%.

[0029] Weigh each component according to the above weight ratio, firstly mix the zinc-chromium spinel powder, calcium aluminate cement, α-Al 2 O 3 Micro powder, Fe 3 Si powder and β-Sialon powder are made into co-milled powder; during production, add tabular corundum particles, fused mullite particles, sillimanite particles to the co-milled powder, stir and mix for 2 minutes and then add other remaining raw materials , After stirring for 6 minutes, the premix is ​​obtained; adding an appropriate amount of water, stirring for 3 minutes, then pouring and molding, and after natural curing, it can be demoulded and dried.

[0030] Preferably, demould after natural curing for 1 day, and continue curing for 3 days afte...

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Abstract

The invention aims at providing a high-performance electric furnace cover. The high-performance electric furnace cover is prepared from the following components in percentage by weight: 18-33 percent of fused alumina zirconia, 15-25 percent of tabular corundum particles, 8-12 percent of electro-fused mullite particles, 3-6 percent of sillimanite particles, 3-8 percent of zincochromite powder, 8-15 percent of calcium aluminate cement, 2-6 percent of alpha-Al2O3 micropowder, 5-8 percent of Fe3Si powder, 4-6 percent of beta-sialon powder and 0.4-0.6 percent of additives. The high-performance electric furnace cover is applicable to an electric furnace environment having a relatively high molten iron blending proportion, has excellent sintering performance, iron slag erosion resistance and thermal shock resistance, and has good peeling resistance in the using process.

Description

Technical field [0001] The invention relates to the technical field of refractory materials, in particular to a high-performance electric furnace cover and a preparation method thereof. Background technique [0002] The commonly used steelmaking equipment in steelmaking production is the steelmaking electric arc furnace. As an important part of the steelmaking electric arc furnace, the electric furnace cover is subjected to heat radiation from a strong high-temperature arc, frequent thermal shocks and high-temperature molten slag splashes during steelmaking. The erosion of steel is the weak link of steel-making electric arc furnace. [0003] Under the conditions of early steelmaking, the strength of steelmaking was low and the smelting temperature was low. Therefore, silica bricks were commonly used as electric furnace covers. The silica bricks were light in weight, high in strength, good thermal shock resistance, and low creep efficiency, and they were widely used; With the advan...

Claims

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Application Information

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IPC IPC(8): C04B35/66C04B35/106C04B35/63F27D1/18
CPCC04B35/106C04B35/6303C04B2235/3217C04B2235/3222C04B2235/3463C04B2235/3869C04B2235/3891C04B2235/48C04B2235/5427F27D1/18
Inventor 王杉杉
Owner 嘉兴新耐建材有限公司
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