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Dry type working liner material for erosion resistance continuous casting tundish

A working lining and corrosion-resistant technology, which is applied in the field of dry-type working lining for corrosion-resistant continuous casting tundish, to achieve the effect of improving high temperature strength and slag erosion resistance, and increasing service life

Inactive Publication Date: 2006-07-12
NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to solve the deficiencies of heat insulation boards, smears, spray paints and existing dry materials, and to provide a method that can simplify on-site construction, save time and effort, and improve the high-temperature strength and slag resistance of the working lining. , and at the same time, there is an erosion-resistant continuous casting tundish dry working lining with the characteristics of no pollution to molten steel and long service life.

Method used

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Embodiment Construction

[0028] The present invention is described in detail below in conjunction with embodiment.

[0029] This embodiment is a preferred solution of the present invention, which has the characteristics of high temperature strength, strong resistance to slag erosion, and long service life.

[0030] Its raw material ratio is:

[0031] Magnesia: 33% of sintered magnesia with a particle size of 5-1mm, 20% of sintered magnesia with a particle size of 1-0.2mm, 28% of sintered magnesia with a particle size of ≤0.074mm;

[0032] Additives: 7% fused magnesia chrome sand with particle size ≤0.088mm, 3% Cr2O3 micropowder;

[0033] Burning accelerator: 2% light-burned magnesium oxide with particle size ≤0.045mm;

[0034] Binder: resin powder 5%, dextrin 2%.

[0035] The technical indicators of raw materials are as follows:

[0036] Sintered magnesia: MgO≥95.0%, SiO2≤2.0%, CaO≤1.6%, ignition loss≤1.0%, particle volume density≥3.25g / cm 3 .

[0037] Fused magnesia-chrome sand: MgO≥68.0%, SiO2...

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Abstract

The invention relates to an amorphous refractory; especially to an erosion resistance concast intermedium finish-go-home work sark. It uses magnetite as main raw material and the light-burned magnesium oxide, boric acid, silicon powder and aluminum powder as accelerator and the resin, starch gum and so on as insurance contract. It adds one or some kinds of chrome green, compound chrome-magnesite brick, magnesite-chrome brick. The raw material is that (wt%): the magnesite 5-1mm is 10-35%, 1-0.2mm is 10-35%, <=0.074mm is 20-40%, <=0.088mm admixture is 5-20%, <=0.088mm accelerator is 1-5%, starch gum is 5-12%. Each raw material has a certain quality technology index.

Description

Technical field: [0001] The invention relates to a monolithic refractory material, in particular to an erosion-resistant continuous casting tundish dry-type working lining. Background technique: [0002] The tundish is the intermediate storage where molten steel is diverted from the ladle to the crystallizer in the process of steelmaking and continuous casting, and it is very important to ensure clean steelmaking and multi-furnace continuous casting. The quality of refractory materials for tundish plays an important role in eliminating inclusions in molten steel, maintaining the stability of steel flow and improving the quality of continuous casting steel. Requirements for refractory materials used in the working layer of the tundish are: corrosion resistance, erosion resistance, good heat preservation, no pollution to molten steel, easy construction and unpacking, etc. [0003] In terms of material, the working lining of the tundish was mostly silicon material in the past....

Claims

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Application Information

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IPC IPC(8): C04B35/66C04B35/04C04B35/63
Inventor 涂军波魏军从卜景龙王静
Owner NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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