Crystallizer covering slag for continuously casting high-manganese high-aluminum steel and preparation method of crystallizer covering slag

Abstract

The invention provides a crystallizer covering slag for continuously casting high-manganese high-aluminum steel and preparation method of the crystallizer covering slag. The covering slag is prepared from the following components in parts by weight: 20-38 parts of CaO, 20-35 parts of Al2O3, 5-18 parts of SiO2, 10-22 parts of BaO, 2-7 parts of Li2O, 5-12 parts of F<->, 1-4 parts of MgO, 2-8 parts of C and Fe2O3 which is less than or equal to 2 parts. According to the preparation method disclosed by the invention, wollastonite, limestone, quartz sand, fluorite, bauxite, barium carbonate, magnesia, soda, lithium carbonate and carbonaceous materials are used as raw materials, and the covering slag is prepared through the following steps of: calculating of consumption, melting, smashing, fine grinding, drying and granulation. The covering slag disclosed by the invention has the characteristics of being low in reactivity and good in property stability, the lubrication and the thermal transmission of casting blanks can be effectively coordinated and controlled, the smooth performing of the continuous casting process of the high-manganese high-aluminum steel can be guaranteed, high-manganese high-aluminum steel continuous casting blanks with excellent surface quality are cast, and multi-heat continuous casting can be realized.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to mold mold powder for high manganese and high aluminum steel continuous casting and a preparation method thereof. Background technique [0002] Mold slag is a kind of synthetic slag used in the continuous casting process. It has multiple functions such as heat insulation and heat preservation, prevention of molten steel oxidation, absorption of inclusions, lubrication and control of heat transfer. important. High manganese and high aluminum steel, such as TRIP steel, TWIP steel, austenitic non-magnetic steel 20Mn23AlV, Mn13, etc., have excellent mechanical and mechanical properties and cost performance. The production of high manganese and high aluminum steel, such as 20Mn23AlV austenitic non-magnetic steel, has the following characteristics in the continuous casting process: the content of alloy elements such as Mn and Al in the steel is high, the liquidus tempera...

AI Technical Summary

Problems solved by technology

Patents CN104439133A and CN104607608A respectively disclose mold slag suitable for continuous casting of high manganese and high aluminum steel and medium manganese steel for automobiles, but both patents contain relatively high content of Na 2 O, respectively 4~11% and 10~14%, on the one hand, Na 2 O will also react with the high aluminum content in molten steel and deteriorate the performance of mold flux. On the other hand, Na 2 O can reduce the surface tension of mold slag, which is not conducive to the separation of slag and steel, and will increase the probability of slag entrainment

To sum up, the existing mold powder is not suitable for continuous casting of high manganese and high aluminum steel

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