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Carbon-free tundish coating material

A technology of tundish and coating material, applied in the field of refractory material preparation, can solve the problems of short service life, easy to burst and slump, low coating thickness, etc. Effect

Inactive Publication Date: 2019-11-12
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

[0003] The invention proposes a carbon-free tundish smear, which solves the problems of easy bursting and collapse, low smear thickness and short service life during the construction process of the tundish smear in the prior art

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A carbon-free tundish smear, made of the following raw materials: 20 kg of magnesia olive sand with a particle size of 1 to 3 mm, 20 kg of fused magnesia particles with a particle size of 1 to 3 mm, and 20 kg of fused magnesia particles with a particle size of 25 kg of fused magnesia fine powder of 200 mesh, 5 kg of fused magnesia fine powder of 800 mesh in particle size, 2 kg of Guangxi white clay, 1 kg of bentonite, 0.6 kg of jute fiber, 0.1 kg of polypropylene fiber, silicon dioxide 0.5 kg of fine powder, 1 kg of calcium nitrate and 0.5 kg of talcum powder.

[0022] Weigh the raw materials according to the above weight ratio, first add magnesia olive sand, fused magnesia particles, fused magnesia fine powder, Guangxi white mud and bentonite into the stirring pot in order of particle size from large to small, and mix for 3 Minutes, then add jute fiber, polypropylene fiber, silicon dioxide micropowder, calcium nitrate and talcum powder, and knead for about 8 minutes to...

Embodiment 2

[0026] A carbon-free tundish smear, made of the following raw materials in parts by weight: 27.5 kg of magnesia olive sand with a particle size of 1 to 3 mm, 30 kg of fused magnesia particles with a particle size of 1 to 3 mm, 38 kg of fused magnesia fine powder with a diameter of 200 mesh, 7 kg of fused magnesia fine powder with a particle size of 800 mesh, 2.5 kg of Guangxi white clay, 2 kg of bentonite, 1.3 kg of jute fiber, 0.15 kg of polypropylene fiber, binder A1.7 kg and 3.3 kg of calcium nitrate.

[0027] Specifically, the binding agent A may be Elkem SioxX-Flow product produced by Elkem.

[0028] Weigh the raw materials according to the above weight ratio, first add magnesia olive sand, fused magnesia particles, fused magnesia fine powder, Guangxi white mud and bentonite into the stirring pot in order of particle size from large to small, and mix for 3 Minutes, then add jute fiber, polypropylene fiber, binder A and calcium nitrate, and knead for about 8 minutes to ob...

Embodiment 3

[0032] A carbon-free tundish smear, made of the following raw materials in parts by weight: 35 kg of magnesia olive sand with a particle size of 1 to 3 mm, 40 kg of fused magnesia particles with a particle size of 1 to 3 mm, 25 kg of fused magnesia fine powder with a diameter of 200 mesh, 35 kg of fused magnesia fine powder with a particle size of 320 mesh, 3 kg of clay powder, 3 kg of bentonite, 2 kg of jute fiber, 0.2 kg of polypropylene fiber, binder A3 .4 kg, talc powder 3.4 kg, aluminum dihydrogen phosphate 0.7 kg and sodium lignosulfonate 0.5 kg.

[0033] Specifically, the binding agent A may be Elkem SioxX-Flow product produced by Elkem.

[0034] Weigh the raw materials according to the above weight ratio, first add magnesia olive sand, fused magnesia particles, fused magnesia fine powder, Guangxi white mud and bentonite into the stirring pot in order of particle size from large to small, and mix for 3 Minutes, then add jute fiber, polypropylene fiber, binder A, talcum...

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PUM

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Abstract

The invention provides a carbon-free tundish coating material, which is prepared from the following raw materials by weight: 20-35 parts of forsterite sand, 20-40 parts of fused magnesia particles, 30-60 parts of fused magnesia fine powder, 2-3 parts of clay powder, 1-3 parts of bentonite, 0.6-2 parts of jute fibers, 0.1-0.2 part of polypropylene fibers and 2-8 parts of a composite additive. The composite additive is a mixture of a binder A and calcium salt, a mixture of silica micro powder, calcium salt and talc powder, or a mixture of a binder A, aluminum dihydrogen phosphate, talc powder and lignosulfonate. The beneficial effects of the coating material are good bonding performance, high normal-temperature and high-temperature strength, long service lifetime, high application thickness,no falling down, no collapse, and no cracking, burst or peeling during baking dehydration.

Description

technical field [0001] The invention relates to the technical field of refractory material preparation, in particular to a carbon-free tundish smear. Background technique [0002] Tundish continuous casting plays an important role in the metallurgical industry. With the continuous change of steelmaking conditions and steel type requirements, it is necessary to continuously improve the construction and service performance of refractory materials to meet the requirements of continuous casting without increasing carbon and polluting molten steel. And long-life poured steel is also a problem that must be solved for traditional tundish refractories. Due to the fact that the traditional tundish dry material uses a resin binder, which cannot solve the problem of carbon increase, the construction of the traditional tundish coating material is difficult, and the working layer of the tundish is prone to cracks and collapse during use, and the coating thickness does not exceed 100mm, a...

Claims

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Application Information

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IPC IPC(8): C04B35/043
CPCC04B35/043C04B2235/3418C04B2235/3445C04B2235/349C04B2235/443C04B2235/5212C04B2235/9607
Inventor 赵冉何枫于九利韩丽丁海瑞张晓波高梅刘美荣
Owner 北京利尔高温材料股份有限公司