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Preparation method of stainless steel continuous casting protection slag

A continuous casting mold slag and stainless steel technology, which is applied in the field of preparation of stainless steel continuous casting mold slag, can solve the problems of continuous casting difficulties, crystallizer fish formation, agglomeration, etc., and achieves good application prospects, low preparation cost and simple process Effect

Inactive Publication Date: 2018-03-09
陈书宇
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ferritic stainless steel generally contains relatively high Ti and Cr, which makes it easy to generate high melting point compounds in the crystallizer. So far, ferritic stainless steel, especially ferritic stainless steel containing titanium, has not been able to fully realize multi-furnace continuous production. There are three major technical problems in the continuous casting production of pouring: one is the crystallizer "fish formation" (refers to agglomeration, crust or cold skin); Steel surface quality problems

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Grind activated carbon, wollastonite, power plant ash, limestone, soda ash and cryolite to 0.1~1mm and mix evenly. The mixing ratio is 3% by weight of activated carbon, 15% of power plant ash, 10% of limestone, and 20% of soda ash. 10% of cryolite, and the rest are wollastonite to make a mixed material; then lithium hydroxide is added, and the amount of lithium hydroxide accounts for 4.5% of the total weight of the mixed material to obtain a lithium-doped material;

[0019] Adding water to the lithium-doped material and stirring to form a slurry, wherein water accounts for 20% of the total weight of the slurry;

[0020] Dry the slurry at 500°C for 1 hour to make stainless steel continuous casting mold flux with a particle size of 0.5-1.5 mm.

Embodiment 2

[0022] Grind activated carbon, wollastonite, power plant ash, limestone, soda ash and cryolite to 0.1~1mm and mix evenly. The mixing ratio is 4% by weight of activated carbon, 10% of power plant ash, 13% of limestone, and 15% of soda ash. 12% of cryolite, and the rest are wollastonite to make a mixed material; then lithium hydroxide is added, and the amount of lithium hydroxide accounts for 3.5% of the total weight of the mixed material to obtain a lithium-doped material;

[0023] Adding water to the lithium-doped material and stirring it into a slurry, wherein water accounts for 25% of the total weight of the slurry;

[0024] Dry the slurry at 400°C for 2 hours to make stainless steel continuous casting mold flux with a particle size of 0.5~1.5mm.

Embodiment 3

[0026] Grind activated carbon, wollastonite, power plant ash, limestone, soda ash and cryolite to 0.1~1mm and mix evenly. The mixing ratio is 5% activated carbon, 5% power plant ash, 15% limestone, 10% soda ash, 15% of cryolite and the rest are wollastonite to make a mixed material; then lithium hydroxide is added, and the amount of lithium hydroxide accounts for 2.5% of the total weight of the mixed material to obtain a lithium-doped material;

[0027] Adding water to the lithium-doped material and stirring to form a slurry, wherein water accounts for 30% of the total weight of the slurry;

[0028] Dry the slurry at 300°C for 3 hours to make stainless steel continuous casting mold flux with a particle size of 0.5-1.5mm.

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Abstract

A method for preparing mold flux for stainless steel continuous casting, which is carried out according to the following steps: (1) Grinding and mixing activated carbon, wollastonite, power plant ash, limestone, soda ash and cryolite, and then adding lithium hydroxide to obtain lithium-doped material; (2) adding water to the lithium-doped material and stirring to form a slurry; (3) drying at 300-500°C to make stainless steel continuous casting mold flux. The viscosity, melting temperature, crystallization rate and dissolution and absorption rate of TiN of the continuous casting mold flux of the present invention meet the requirements of continuous casting, the preparation cost is low, the process is simple and the like, and has good application prospects.

Description

technical field [0001] The invention relates to continuous casting mold flux and a preparation method thereof, in particular to a preparation method of stainless steel continuous casting mold flux. Background technique [0002] With the in-depth research and development of ferritic stainless steel, its production and application technology has been continuously improved and perfected, overcoming some performance deficiencies in the past, the quality has been greatly improved, and the application range has been continuously expanded. Ferritic stainless steel has great development prospects in my country, but due to the lack of mature experience in the production of high-performance ferritic stainless steel in my country's iron and steel enterprises, the development of ferritic stainless steel is hindered, and many high-performance ferritic stainless steels still rely on imports . Ferritic stainless steel generally contains relatively high Ti and Cr, which makes it easy to gen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D11/111
CPCB22D11/111
Inventor 陈书宇
Owner 陈书宇