Tundish composite working lining, making method thereof and tundish

A tundish and working lining technology, applied in the field of iron and steel metallurgy, can solve problems such as low production efficiency, difficult construction, and long baking time of coating materials

Active Publication Date: 2016-08-10
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

[0004] The smear has good erosion resistance and corrosion resistance, and is resistant to non-metallic inclusions in molten steel (such as Al 2 o 3 , SiO 2 etc.) have the advantages of adsorption, that is, low-carbon, clean, etc.; but the baking time of the smear is longer, generally 2 to 6 hours, resulting in low production efficiency, high energy consumption, and high cost. If the baking time is insufficient, it will cause smearing The combination of the material and the permanent lining is not firm, peeling and cracking occur, and due to the requirements of thermal insulation, the porosity of the coating working lining of the tundish is relatively large, and the pores of the coating are the main channels for molten slag and molten steel to penetrate into the refractory working layer. The erosion of the coating by slag is increased. In addition, the coating material also has the disadvantages of not being easy to turn over, difficult construction, long turnover period, and high energy consumption for baking.

Method used

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  • Tundish composite working lining, making method thereof and tundish
  • Tundish composite working lining, making method thereof and tundish
  • Tundish composite working lining, making method thereof and tundish

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0081] The composite working lining of the tundish provided in this embodiment is composed of a dry material layer and a smear layer;

[0082] First, the dry bed consists of the following components:

[0083] (1) The aggregate is composed of the following components:

[0084]

[0085] (2) The matrix is ​​composed of the following components:

[0086]

[0087] (3) The binding agent is composed of the following components:

[0088]

[0089] (4) described additive is made up of following composition:

[0090] additive

[0091] Secondly, the smear layer is also composed of aggregate, matrix, binder and additives. In practical applications, the composition of the smear layer can be the same as that of the dry material layer provided by this embodiment. The difference between the two lies in : In the dry material layer, the binder is 5 parts, and the additive is 2 parts, while in the smear layer, the binder is 2.5 parts, and the additive is 5.5 parts, so the dr...

Embodiment 2

[0093] The composite working lining provided in this embodiment is composed of a dry material layer and a smear layer;

[0094] First, the dry bed consists of the following components:

[0095] (1) The aggregate is composed of the following components:

[0096]

[0097] (2) The matrix is ​​composed of the following components:

[0098]

[0099] (3) The binding agent is composed of the following components:

[0100]

[0101] (4) described additive is made up of following composition:

[0102] additive

[0103] Secondly, the smear layer is also composed of aggregate, matrix, binder and additives. In practical applications, the composition of the smear layer can be the same as that of the dry material layer provided by this embodiment. The difference between the two lies in : In the dry material layer, the binder is 4 parts, and the additive is 1.5 parts, while in the spread material layer, the binder is 3 parts, and the additive is 6 parts, so the dry mater...

Embodiment 3

[0105] The composite working lining provided in this embodiment is composed of a dry material layer and a smear layer;

[0106] First, the dry bed consists of the following components:

[0107] (1) The aggregate is composed of the following components:

[0108]

[0109] (2) The matrix is ​​composed of the following components:

[0110]

[0111] (3) The binding agent is composed of the following components:

[0112]

[0113] (4) described additive is made up of following composition:

[0114] additive

clay

Bentonite

Aluminum oxide powder

Silica powder

glass powder

Borax

Antioxidants

number of copies

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[0115] Secondly, the smear layer is also composed of aggregate, matrix, binder and additives. In practical applications, the composition of the smear layer can be the same as that of the dry material layer provided by this embodiment. The difference between the two lies in : In the d...

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Abstract

The invention provides a tundish composite working lining. The inner layer of the tundish composite working lining is a dry material layer, the outer layer of the composite working lining is a coated layer, and the dry material layer and the coated layer are closely connected and compounded into an integrated structure. The dry material layer and the coated layer are combined into the composite working lining, the advantages of the dry material layer and the coated layer are combined, and the composite working lining has the advantages of convenient construction, difficult sintering, easy tundish tilting and recarburization reduction, etc.

Description

technical field [0001] The invention relates to the field of iron and steel metallurgy, in particular to a composite working lining for a tundish, a manufacturing method thereof, and a tundish. Background technique [0002] In recent years, with the vigorous development of the steel industry and the progress of smelting technology, the comprehensive requirements for refractory materials for the working lining of the tundish are getting higher and higher. At present, the most widely used materials are smear materials and dry materials. [0003] The dry material is gradually sintered from the working layer to the permanent lining relying on the temperature gradient during use, and a dense structure is formed on the hot surface of the working layer. Low density is good for tundish insulation; in addition, dry material also has the advantages of convenient construction, flexible turnover, safe application, easy turning and unpacking, can increase the service life of the working...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B35/20C04B35/63C04B35/634
CPCC04B35/20C04B35/6303C04B35/63476C04B35/66C04B2235/5427
Inventor 赵现华刘丽于九利赵伟
Owner 北京利尔高温材料股份有限公司
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