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High-temperature-resistant material, preparation method thereof, combined prefabricated part of tundish impact area and tundish impact area

A technology of high temperature resistance and buffer part, which is applied in the field of high temperature resistant materials and its preparation, combined prefabricated parts in the impact area of ​​the tundish and the impact area of ​​the tundish, which can solve the problems of easy permeable steel, short service life of the tundish, and inability to resist molten steel erosion, etc. question

Active Publication Date: 2020-03-17
山东国茂冶金材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the impact zone of the current tundish has the problems of easy penetration of steel in the combined gap of the split prefabricated parts, resistance to molten steel erosion and steel slag erosion, resulting in a short overall service life of the tundish

Method used

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  • High-temperature-resistant material, preparation method thereof, combined prefabricated part of tundish impact area and tundish impact area
  • High-temperature-resistant material, preparation method thereof, combined prefabricated part of tundish impact area and tundish impact area
  • High-temperature-resistant material, preparation method thereof, combined prefabricated part of tundish impact area and tundish impact area

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preparation example Construction

[0035] The present invention provides a preparation method for the high temperature resistant material described in the above technical solution, comprising the following steps:

[0036] Mix magnesia, bauxite clinker, white corundum powder, silica powder, steel fiber, water reducer and explosion-proof fiber to obtain a dry blend;

[0037] The dry mixture is mixed with water, followed by molding, curing and baking in sequence to obtain a high temperature resistant material.

[0038] The invention mixes magnesia, bauxite clinker, white corundum powder, silicon dioxide powder, steel fiber, water reducing agent and explosion-proof fiber to obtain a dry mixture. In the present invention, the principle of adding the raw materials during the mixing is preferably to add the particles in order from large to small, then slowly add the steel fibers, and then slowly add the explosion-proof fibers after stirring for a period of time, and stir until the steel fibers and the explosion-proof ...

Embodiment 1

[0058] According to the number of parts by weight, first add 1.5 parts of 446# heat-resistant steel fiber into the mixer, and then add 0.2 parts of white filamentous polypropylene, 35 parts of 95 mid-grade magnesia, 55 parts of 85 bauxite clinker, 5 1 part of white corundum powder (with a particle size of 200 mesh), 5 parts of silica micropowder (with a particle size of <1 μm) and 0.4 part of sodium hexametaphosphate, dry mixed for 2 minutes to obtain a dry blend;

[0059] Add 6 parts of water to the dry mixture and stir for 3-5 minutes to obtain mud;

[0060] Add the mud into the combined mold fixed on the vibrating platform. The molding time is controlled by a timer. The final product is shaped by the vibration of the mold and the workbench. At this time, the vibration platform is always in the open vibration state to ensure the compactness of the mud and the discharge of gas in the mold. The molding time is 30 minutes;

[0061] After the molding is completed, the molded ma...

Embodiment 2

[0063] According to the number of parts by weight, first add 1.5 parts of 446# heat-resistant steel fiber into the mixer, and then add 0.2 parts of white filamentous polypropylene, 40 parts of 95 mid-grade magnesia, 50 parts of 85 bauxite clinker, 5 1 part of white corundum powder (with a particle size of 200 mesh), 5 parts of silica micropowder (with a particle size of <1 μm) and 0.4 part of sodium hexametaphosphate, dry mixed for 2 minutes to obtain a dry blend;

[0064] Add 6.5 parts of water to the dry mixture and stir for 3-5 minutes to obtain mud;

[0065] Add the mud into the combined mold fixed on the vibrating platform. The molding time is controlled by a timer. The final product is shaped by the vibration of the mold and the workbench. At this time, the vibration platform is always in the open vibration state to ensure the compactness of the mud and the discharge of gas in the mold. The molding time is 30 minutes;

[0066] After the forming is completed, the formed ...

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Abstract

The invention relates to the technical field of high-temperature materials, in particular to a high-temperature-resistant material, a preparation method thereof, a combined prefabricated part of a tundish impact area and the tundish impact area. The high-temperature-resistant material includes following raw materials by weight: 10-50 parts of magnesia, 30-75 parts of bauxite clinker, 2-10 parts ofwhite fused alumina powder, 1-10 parts of silica powder, 1-10 parts of steel fibers, 0.1-1 part of a water reducing agent, 0.1-1 part of explosion-proof fibers and 2-10 parts of water. The high-temperature-resistant material has good thermal vibration stability, strong impact resistance and excellent resistance to steel slag erosion. The combined prefabricated part of the impact area prepared using the material and the matching tundish impact area can significantly improve service lifetime of a tundish.

Description

technical field [0001] The invention relates to the technical field of materials for continuous casting, in particular to a high-temperature-resistant material and a preparation method thereof, a combined prefabricated part of a tundish impact zone, and a tundish impact zone. Background technique [0002] As an important link in steelmaking production, continuous casting is the basis and guarantee for the entire steelmaking system to achieve high-efficiency and low-cost production. The tundish is an important functional container for receiving molten steel, splitting the molten steel, and promoting the floating of inclusions in the molten steel during the continuous casting production process. The importance of the impact zone as a key part that restricts the overall life of the tundish is self-evident. [0003] The commonly used tundish impact zone combination forms are: dry material + impact plate + slag retaining wall; dry material + current stabilizer + slag retaining w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/443C04B35/76C04B35/66C04B35/622C04B35/63B22D41/02
CPCB22D41/02C04B35/443C04B35/622C04B35/6303C04B35/66C04B35/76C04B2235/3206C04B2235/3217C04B2235/3418C04B2235/5212C04B2235/5436C04B2235/6562C04B2235/6567C04B2235/9607C04B2235/9615C04B2235/9669
Inventor 张文国李乃动王炎平孟凡祥张学敏梁绪正孙晓
Owner 山东国茂冶金材料有限公司
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