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Crystallizer casting powder and application thereof

A technology of mold mold powder and weight percentage, applied in the field of steelmaking accessories, can solve the problem that mold mold powder can not coordinately control lubrication and heat transfer, etc., achieve good lubrication and heat transfer functions, high crystallization ratio, Effects of Controlling Crystallographic Properties

Pending Publication Date: 2022-04-12
湖南华菱涟源钢铁有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] This application provides a mold powder and its application, aiming to solve the problem that the mold powder cannot coordinate and control lubrication and heat transfer in the process of high-speed continuous casting

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0079] Based on the total weight of mold flux, the components and their weight percentages are as follows: CaO*20.0%, SiO 2 20.8%, BaO 8.1%, Li 2 O 1.1%, Na 2 O 6.9%, CaF 2 23.0%, Al 2 o 3 4.7%, MgO 3.1%, Fe 2 o 3 0.48%, C 9.9%, and the rest are impurities with a content not exceeding 2%.

Embodiment 2

[0081] Based on the total weight of mold flux, the components and their weight percentages are as follows: CaO*23.1%, SiO 2 23.1%, BaO 6.5%, Li 2 O 0.6%, Na 2 O 5.7%, CaF 2 21.1%, Al 2 o 3 4.4%, MgO 3.8%, Fe 2 o 3 0.83%, C 9.4%, and the rest are impurities with a content not exceeding 2%.

Embodiment 3

[0083] Based on the total weight of mold flux, the components and their weight percentages are as follows: CaO*28.1%, SiO 2 25.47%, BaO 3.6%, Li 2 O 0.7%, Na 2 O 5.3%, CaF 2 20.7%, Al 2 o 3 3.1%, MgO 3.3%, Fe 2 o 3 0.41%, C 8.2%, and the rest are impurities with a content not exceeding 2%.

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PUM

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Abstract

Based on the total weight of the crystallizer casting powder, the crystallizer casting powder is prepared from the following components in percentage by weight: 36.5 to 44.5 percent of CaO, 20.5 to 26.5 percent of SiO2, 3 to 9 percent of BaO, 0.5 to 1.5 percent of Li2O, 5 to 8 percent of Na2O, 10 to 12 percent of F, 3 to 5 percent of Al2O3, 2 to 4 percent of MgO, 0 to 1.5 percent of Fe2O3, 8 to 10 percent of C and the balance of inevitable impurities. The content of different components is controlled to play a synergistic role, so that the crystallizer casting powder has the properties of high alkalinity, low melting point, moderate viscosity, low transition temperature, high crystallization temperature and high crystallization proportion, and the crystallizer casting powder is ensured to have good lubrication and heat transfer functions in the high-pulling-speed continuous casting process; the continuous casting process is smooth; and the surface quality of a casting blank is improved.

Description

technical field [0001] The application belongs to the technical field of steelmaking auxiliary materials, and in particular relates to mold powder and its application. Background technique [0002] At the end of the 1980s, in order to improve the production efficiency of continuous casting, the development and research of high-speed continuous casting technology represented by thin slab continuous casting and rolling technology began at home and abroad. Compact strip continuous casting production (Compact Strip Production (CSP) has attracted widespread attention due to its advantages of high efficiency, low investment, and low energy consumption. As a key functional material in the continuous casting process, mold powder has the functions of isolating air to prevent oxidation of molten steel, absorbing inclusions in molten steel, heat insulation and heat preservation to prevent crusting of molten steel, lubricating billet and improving The role of heat transfer from the sol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D11/111C22C33/04
Inventor 罗钢齐江华邓必荣吴婷陈振文王海川徐光谢森林肖磊尹振芝陈伟戴智才刘彭
Owner 湖南华菱涟源钢铁有限公司
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