Refractory material used for cover of electric furnace

A technology of refractory materials and electric furnace cover, which is 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 improving service life, high thermal shock resistance, and promoting high-temperature sintering

Inactive Publication Date: 2017-08-29
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 refractory material for an electric furnace cover, aiming to provide a refractory material that solves the defects of traditional corundum with high rigidity, high brittleness and poor shaping, and provides a kind of refractory material with good corrosion resistance, good shaping, good thermal shock resistance, and high density. High, long service life, good corrosion resistance electric furnace cover

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] 30% chrome corundum, 25% platy corundum particles, 12% fused mullite particles, 3% sillimanite particles, 8% zinc-chromium spinel powder, 8% calcium aluminate cement, α-Al 2 o 3 Micronized 3%, Fe 3 Si powder 5%, β-sialon powder 6%, admixture 0.4%.

[0021] Weigh each component according to the weight ratio in the above, first zinc chromium spinel powder, calcium aluminate cement, α-Al 2 o 3 Micronized powder, Fe 3 Si powder and β-sialon powder are made into co-grinding powder; during production, platy corundum particles, fused mullite particles, and sillimanite particles are added to the co-grinding powder, and other remaining raw materials are added after mixing for 2 minutes , after stirring for 6 minutes, the premix was obtained; add an appropriate amount of water, stir for 3 minutes, pour into the shape, and then demould and dry after natural curing.

[0022] Preferably, the mold is demoulded after 1 day of natural curing, and the curing is continued for 3 days...

Embodiment 2

[0024] 33% chrome corundum, 22% platy corundum particles, 12% fused mullite particles, 3% sillimanite particles, 8% zinc-chromium spinel powder, 8% calcium aluminate cement, α-Al 2 o 3 Micronized 3%, Fe 3 Si powder 6%, β-sialon powder 5%, admixture 0.5%.

[0025] Weigh each component according to the weight ratio in the above, first zinc chromium spinel powder, calcium aluminate cement, α-Al 2 o 3 Micronized powder, Fe 3 Si powder and β-sialon powder are made into co-grinding powder; during production, platy corundum particles, fused mullite particles, and sillimanite particles are added to the co-grinding powder, and other remaining raw materials are added after mixing for 2 minutes , after stirring for 6 minutes, the premix was obtained; add an appropriate amount of water, stir for 3 minutes, pour into the shape, and then demould and dry after natural curing.

[0026] Preferably, the mold is demoulded after 1 day of natural curing, and the curing is continued for 3 days...

Embodiment 3

[0028] 27% chrome corundum, 25% platy corundum particles, 12% fused mullite particles, 3% sillimanite particles, 8% zinc chromium spinel powder, 8% calcium aluminate cement, α-Al 2 o 3 Micronized 3%, Fe 3 Si powder 8%, β sialon powder 6%, admixture 0.6%.

[0029] Weigh each component according to the weight ratio in the above, first zinc chromium spinel powder, calcium aluminate cement, α-Al 2 o 3 Micronized powder, Fe 3 Si powder and β-sialon powder are made into co-grinding powder; during production, platy corundum particles, fused mullite particles, and sillimanite particles are added to the co-grinding powder, and other remaining raw materials are added after mixing for 2 minutes , after stirring for 6 minutes, the premix was obtained; add an appropriate amount of water, stir for 3 minutes, pour into the shape, and then demould and dry after natural curing.

[0030]Preferably, the mold is demoulded after 1 day of natural curing, and the curing is continued for 3 days ...

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PUM

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Abstract

The invention is direct at providing a refractory material used for a cover of an electric furnace. The refractory material comprises, by weight, 18-33% of chromium corundum, 15-25% of tabular corundum granules, 8-12% of electric-smelting mullite granules, 3-6% of sillimanite granules, 3-8% of zincochromite powder, 8-15% of calcium aluminate cement, 2-6% of alpha-Al2O3 micropowder, 5-8% of Fe3Si powder, 4-6% of beta-Theron powder, and 0.4-0.6% of an additive. The refractory material is suitable for an electric furnace with high addition ratio of molten iron, has excellent sintering performance, anti-iron-slag-erosion performance and thermal shock stability, and has good anti-stripping performance during use.

Description

technical field [0001] The invention relates to the technical field of refractory materials, in particular to a refractory material for an electric furnace cover. Background technique [0002] The steelmaking equipment commonly used in steelmaking production is the steelmaking electric arc furnace. The electric furnace cover is an important part of the steelmaking electric arc furnace. Corrosion is the weak link of steelmaking electric arc furnace. [0003] In the early steelmaking conditions, the steelmaking intensity was low and the smelting temperature was low, so silica bricks were often used as electric furnace covers. Silica bricks are light in weight, high in strength, good in thermal shock resistance, and low in creep efficiency, and have been widely used; With the advancement of electric furnace steelmaking technology, the strength of steelmaking has increased, and the smelting temperature has increased, and silica bricks have gradually been replaced by high-alumin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/105C04B35/622C04B35/63C21C5/52
CPCC04B35/105C04B35/622C04B35/6303C04B2235/3243C04B2235/3463C04B2235/3869C04B2235/3891C04B2235/77C04B2235/96C04B2235/9623C04B2235/9676C21C5/52Y02P10/20
Inventor 王杉杉
Owner 嘉兴新耐建材有限公司
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