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Anti-seepage steel environment-friendly tundish fire clay, preparation method and construction method

A tundish and environmentally friendly technology, applied in the field of refractory materials, can solve the problems of human body and environmental damage and pollution, gap between fire mud and nozzle, high viscosity of fire mud, avoid chromium pollution, reduce sintering temperature, and high surface activity Effect

Inactive Publication Date: 2021-02-19
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

The traditional tundish fire clay is mostly made of aluminum chrome, and chromium oxide is added to the fire clay. After the tundish is used, the chromium trioxide in the fire clay is transformed into toxic chromium trioxide. If the waste refractories are not recycled properly, it will easily It will cause harm and pollution to the human body and the environment. At the same time, the viscosity of aluminum chrome fire mud is relatively high, so it is inconvenient to apply on site.
In addition, at present, aluminum-chromium fireclay is mostly used after being stirred with water or liquid water glass when used on the construction site. There are also refractory manufacturers who use fireclay and aluminum dihydrogen phosphate solution to mix evenly and then send it to the steel mill for use in barrels. However, due to the large amount of the above-mentioned solution added, the volume of the fire cement will shrink greatly after construction, resulting in a gap between the fire cement and the nozzle. When pouring steel in the tundish, molten steel will easily penetrate through the gap between the fire cement and the nozzle, resulting in steel penetration. There are security risks

Method used

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  • Anti-seepage steel environment-friendly tundish fire clay, preparation method and construction method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The anti-seepage steel environment-friendly tundish fire clay described in this embodiment is calculated according to the parts by mass, and its preparation raw materials include the following components:

[0035]14 parts of white corundum with a particle size of 0.074-0.083mm, 62 parts of high alumina bauxite with a particle size of 0.074-0.083mm, 20 parts of kyanite with a particle size of 0.083-0.180mm, 2.1 parts of silicon micropowder with a particle size of 3-10μm, 1.9 parts of clay with a particle size of 0.044-0.074 mm, 1.2 parts of zirconia powder with a particle size of 1-3 μm, and 0.2 parts of water reducer KF21.

[0036] Among them, in white corundum, Al 2 o 3 Content≥99wt%, R 2 O content≤0.4wt%;

[0037] In high alumina bauxite, Al 2 o 3 Content≥85wt%, Fe 2 o 3 Content≤2.0wt%;

[0038] Kyanite, Al 2 o 3 The content is 45wt%-50wt%, R 2 O content≤0.4wt%;

[0039] Silica powder, SiO 2 Content ≥ 92wt%;

[0040] In clay, Al 2 o 3 Content≥30wt%, Si...

Embodiment 2

[0046] The anti-seepage steel environment-friendly tundish fire clay described in this embodiment is calculated according to the parts by mass, and its preparation raw materials include the following components:

[0047] 16 parts of white corundum with a particle size of 0.074-0.083mm, 65 parts of high alumina bauxite with a particle size of 0.074-0.083mm, 15 parts of kyanite with a particle size of 0.083-0.180mm, 3.1 parts of silica powder with a particle size of 3-10μm, 0.9 parts of clay with a particle size of 0.044-0.074 mm, 1.3 parts of zirconia powder with a particle size of 1-3 μm, and 0.3 parts of water reducing agent KF21.

[0048] Among them, in white corundum, Al 2 o 3 Content≥99wt%, R 2 O content≤0.4wt%;

[0049] In high alumina bauxite, Al 2 o 3 Content≥85wt%, Fe 2 o 3 Content≤2.0wt%;

[0050] Kyanite, Al 2 o 3 The content is 45wt%-50wt%, R 2 O content≤0.4wt%;

[0051] Silica powder, SiO 2 Content ≥ 92wt%;

[0052] In clay, Al 2 o 3 Content≥30wt%, ...

Embodiment 3

[0058] The anti-seepage steel environment-friendly tundish fire clay described in this embodiment is calculated according to the parts by mass, and its preparation raw materials include the following components:

[0059] 21 parts of white corundum with a particle size of 0.074-0.083mm, 50 parts of high alumina bauxite with a particle size of 0.074-0.083mm, 25 parts of kyanite with a particle size of 0.083-0.180mm, 2.5 parts of silicon micropowder with a particle size of 3-10μm, 1.5 parts of clay with a particle size of 0.044-0.074 mm, 1.4 parts of zirconia powder with a particle size of 1-3 μm, and 0.6 parts of water reducing agent KF21.

[0060] Among them, in white corundum, Al 2 o 3 Content≥99wt%, R 2 O content≤0.4wt%;

[0061] In high alumina bauxite, Al 2 o 3 Content≥85wt%, Fe 2 o 3 Content≤2.0wt%;

[0062] Kyanite, Al 2 o 3 The content is 45wt%-50wt%, R 2 O content≤0.4wt%;

[0063] Silica powder, SiO 2 Content ≥ 92wt%;

[0064] In clay, Al 2 o 3 Content≥3...

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Abstract

The invention provides anti-seepage steel environment-friendly tundish fire clay, a preparation method and a construction method, and the anti-seepage steel environment-friendly tundish fire clay comprises the following preparation raw materials in parts by mass: 5-40 parts of white corundum, 35-80 parts of high bauxite, 5-35 parts of kyanite, 0.5-5 part of silica powder, 0.1-5 part of clay, 0.1-4part of zirconium oxide powder and 0.1-1 part of a water reducing agent. The tundish fire clay does not contain chromium, so that chromium pollution can be avoided; the viscosity of the fire clay isreduced through proper raw material particle size distribution, and field construction is facilitated; by adding zirconium oxide and utilizing the phase transformation toughening principle at the hightemperature, the high-temperature breaking strength of the fire clay is greatly improved, and the fire clay can resist to high-temperature molten steel scouring in the using process; and by adding kyanite and Al2O3-containing raw materials and using phase transformation at the high temperature of kyanite and expansion generated by secondary mullite, shrinkage, caused by liquid adding, of the fireclay is made up, gaps between the fire clay and the tundish nozzle are avoided, and the problem of steel seepage is solved.

Description

technical field [0001] The invention belongs to the technical field of refractory materials, and in particular relates to an anti-seepage steel environment-friendly tundish fire clay, a preparation method and a construction method. Background technique [0002] The fire clay for the tundish is used to inlay the sizing nozzle of the tundish, and is applied between the sizing nozzle of the tundish and the seat brick. The traditional tundish fire clay is mostly made of aluminum chrome, and chromium oxide is added to the fire clay. After the tundish is used, the chromium trioxide in the fire clay is transformed into toxic chromium trioxide. If the waste refractories are not recycled properly, it will easily It will cause harm and pollution to the human body and the environment, and at the same time, the aluminum-chrome mortar has a high viscosity, which is inconvenient for on-site construction and application. In addition, at present, aluminum-chromium fireclay is mostly used a...

Claims

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Application Information

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IPC IPC(8): C04B35/119C04B35/66C04B35/622B22D41/54B22D41/02
CPCB22D41/023B22D41/54C04B35/119C04B35/622C04B35/66C04B2235/3418C04B2235/3463C04B2235/349C04B2235/5427C04B2235/9669
Inventor 胡玲军
Owner 北京利尔高温材料股份有限公司
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