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Continuous casting tundish preformed unit pouring material and preparation method thereof

A technology of continuous casting tundish and prefabricated parts, which is applied in the field of refractory materials in the iron and steel metallurgy industry, which can solve the problems of high cost and easy cracking, and achieve the effects of reducing baking costs, protecting the environment and reducing costs

Active Publication Date: 2017-12-01
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

[0005] The invention proposes a method for preparing castables for continuous casting tundish prefabricated parts, which solves the problems of high cost and easy cracking defects in the existing tundish prefabricated parts in the prior art

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] This embodiment relates to a continuous casting tundish prefabricated pouring material, which consists of the following materials in parts by weight:

[0028] 5mm≤grain size2 o 3 content of 73%, CaO content of 10%, TiO 2 The content is 15%, the particle density is 3.3g / cm 3 .

[0029] Sintered bauxite spinel fine powder 15kg; MgO content is 28% in the described sintered bauxite spinel fine powder, SiO 2 The content is 1.5%, Al 2 o 3 The content is 62%, and the particle size is 0.074-0.083mm.

[0030] Sintered magnesia fine powder 4kg; MgO content is 93% in the described sintered magnesia fine powder, SiO 2 The content is 1.5%, the CaO content is 1.2%, the loss on ignition is 0.1%, and the particle density is 3g / cm 3 , the particle size is 0.074mm ~ 0.083mm.

[0031] α-Al 2 o 3 Micropowder 5kg; the α-Al 2 o 3 Al in micropowder 2 o 3 The content is 98.5%, K 2 O or Na 2 The O content is 0.45%, and the particle size is 3 μm;

[0032] ρ-Al 2 o 3 Micropowde...

Embodiment 2

[0038] This embodiment relates to a continuous casting tundish prefabricated pouring material, which consists of the following materials in parts by weight:

[0039] 5mm≤particle size2 o 3 content of 78%, CaO content of 8%, TiO 2 The content is 12%, the particle density is 3.5g / cm 3 .

[0040] Sintered bauxite spinel fine powder 12kg; MgO content is 32% in the described sintered bauxite spinel fine powder, SiO 2 The content is 2.2%, Al 2 o 3 The content is 58%, and the particle size is 0.074-0.083mm.

[0041]Sintered magnesia fine powder 4kg; MgO content is 95% in the described sintered magnesia fine powder, SiO 2 The content is 2.2%, the CaO content is 2.2%, the loss on ignition is 0.5%, and the particle density is 3.3g / cm 3 , the particle size is 0.074mm ~ 0.083mm.

[0042] α-Al 2 o 3 Micropowder 4kg; the α-Al 2 o 3 Al in micropowder 2 o 3 The content is 99.5%, K 2 O or Na 2 The O content is 0.25%, and the particle size is 3 μm.

[0043] ρ-Al 2 o 3 Micropo...

Embodiment 3

[0049] This embodiment relates to a continuous casting tundish prefabricated pouring material, which consists of the following materials in parts by weight:

[0050] 5mm≤grain size2 o 3 Micropowder 4.5kg; ρ-Al 2 o 3 Micropowder 4.5kg; silicon micropowder 0.6kg; stainless steel fiber 1kg; polypropylene fiber 0.2kg; sodium hexametaphosphate 0.2kg.

[0051] The raw materials described in this embodiment are the same as in Example 1.

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Abstract

The invention provides a preparation method of a continuous casting tundish preformed unit pouring material, and solves the problems that a tundish preformed unit in the prior art is high in cost and cracks easily. The continuous casting tundish preformed unit pouring material comprises the following raw materials in parts by weight: 60-80 parts of a black aloxite high-aluminum material, 10-20 parts of sintered bauxite and spinel fine powder, 2-8 parts of sintered magnesite fine powder, 4-8 parts of alpha-Al2O3 micro-powder, 2-6 parts of rho-Al2O3 micro-powder, 0.5-1.5 parts of silica micro-powder, 0-3 parts of stainless steel fibers, 0-0.2 part of a detonation inhibitor and 0.1-0.5 part of a water reducer. Compared with a preformed unit which is prepared from high bauxite and magnesite in the traditional way, the prepared continuous casting tundish preformed unit has the advantages that the cost of the preformed unit can be greatly reduced, the prepared tundish preformed unit can be baked rapidly, the baking cost of preformed unit products can be reduced, and the economic benefit of enterprises can be improved effectively.

Description

technical field [0001] The invention relates to the technical field of refractory materials used in the iron and steel metallurgy industry, in particular to a method for preparing a pouring material for a continuous casting tundish prefabricated part. Background technique [0002] With the increasingly difficult steel situation, the profits of steel companies have dropped sharply, and most steel plants are operating at a loss. At present, steel companies are tapping their potential internally to reduce production costs. Therefore, the price of refractory materials for continuous casting has also dropped, greatly reducing Business revenue and profit margin. [0003] Most of the traditional tundish prefabricated parts use high-alumina bauxite, magnesia and other raw materials. The price of high-alumina bauxite has risen more in recent years, and the tundish prefabricated parts made of magnesia are easy to hydrate during the production process, causing the product to crack. In...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B35/101
CPCC04B35/101C04B2235/3206C04B2235/3222C04B2235/5216
Inventor 胡玲军刘丽何烁司小拴陈亮曹仁锋车晓梅刘美荣王伟伟张晓波赵冉于九利刘洋
Owner 北京利尔高温材料股份有限公司
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