Continuous casting crystallizer casting powder for high-manganese wear-resistant steel

A technology for continuous casting mold and mold slag, which is applied in the field of mold mold mold for continuous casting of molten steel and continuous casting mold mold for high-manganese wear-resistant steel, can solve the problem that it is difficult to control heat transfer and mold mold crystallization. Difficulties and other problems, to achieve the effect of reducing the formation of rare earth oxides, improving the thermal insulation and flow properties, and improving the surface quality of the slab

Inactive Publication Date: 2012-12-19
马鞍山科润冶金材料有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the alkalinity is too low, it will be difficult to crystallize the mold slag, and it is not easy to control the heat transfer

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0018] A continuous casting mold mold slag for high manganese wear-resistant steel, which is obtained by crushing, mixing, pulping and granulating the following raw materials: premelt, modified fly ash, vermiculite, industrial soda ash, fluorite, Lapis lazuli, lithium carbonate, charcoal, the composition of the mold flux contains by weight percentage: SiO 2 32.3~37.8%, CaO 31.0~40.0%, Al 2 o 3 3.0~6.0%, Li 2 O5.5~7.5%, Na 2 O 10.5~18.5%, TC 4.5~6.5%, SrSO4 5.0~6.8%, the rest is K 2 O≤2%, MnO 2 ≤1% and other trace components; the physical and chemical performance parameters of the mold flux are: the hemispherical point melting temperature is 1100-1350°C, the viscosity at 1250°C is 0.18-0.28Pa·s, and the crystallization temperature is 850-1000°C. The solidification temperature is 930-1000°C; the modified fly ash in the raw material is prepared by placing the burned fly ash in 20-25% sulfuric acid and 16-24% sodium hydroxide solution successively, stirring for 20 -22h, th...

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Abstract

The invention discloses a continuous casting crystallizer casting powder for high-manganese wear-resistant steel. The continuous casting crystallizer casting powder is obtained by breaking, mixing, pulping and granulating the flowing raw materials: pre-melted materials, modifying fly ashes, vermiculite, industrial sodium carbonate, fluorite, celestites, lithium carbonate and charcoals. The casting powder comprises the following components by weight percent: 32.3-37.8% of SiO2, 31.0-40.0% of CaO, 3.0-6.0% of Al2O3, 5.5-7.5% of Li2O, 10.5-18.5% of Na2O, 4.5-6.5% of TC, 5.0-6.8% of SrSO4, smaller than or equal to 2% of K2O, smaller than or equal to 1% of MnO2 and other minor components. According to the continuous casting crystallizer casting powder, the fly ashes are adopted for modifying, the dispersibility is improved, the superficial area is increased, furthermore, the heat insulation and the flowing property are promoted, and the nano ore powders also play the role of purifying molten steel and absorbing the impurities in the molten steel.

Description

technical field [0001] The invention relates to a mold slag for continuous casting of molten steel, in particular to a mold slag for continuous casting of high manganese wear-resistant steel, which belongs to the technical field of steelmaking and continuous casting. technical background [0002] Since die steel contains crack-sensitive elements such as Cu, Ti, Cr, and Ni, defects such as cracks and slag pits are prone to occur on the surface of the slab during continuous casting. In the continuous casting process, the use of mold powder in the mold is an indispensable means to control the surface quality of the continuous casting slab and ensure the smooth operation of the continuous casting. The main functions of the mold powder are as follows: 1. Lubricate between the mold and the slab; 2. Absorb the inclusions floating up from the molten steel; 3. Prevent the secondary oxidation of the molten steel and play the role of heat preservation; 4. Control the heat transfer rat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D11/07B22D11/111
Inventor 鲁方志
Owner 马鞍山科润冶金材料有限公司
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