LF composite deoxidization reducer

A technology of composite deoxidation and reducing agent, applied in the field of LF composite deoxidizing and reducing agent, can solve the problem that the deoxidation effect, desulfurization ability and the ability of adsorbing inclusions cannot meet the high performance requirements of molten steel smelting, etc., to reduce labor intensity and environmental pollution, The effect of reducing alloy consumption and having broad application prospects

Inactive Publication Date: 2008-01-30
CHONGQING IRON & STEEL (GRP) CO LTD
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Problems solved by technology

Due to the own reasons of these deoxidizing and reducing agents, the actual deoxidizing effect, desulfurization ability and the ability to adsorb inclusions cannot meet the current requirements for high performance in molten steel smelting

Method used

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  • LF composite deoxidization reducer

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Embodiment Construction

[0024] The present invention is described in detail below in conjunction with embodiment.

[0025] This product is composed of four raw materials: aluminum particles (Al), silicon calcium barium alloy (SiCaBa), silicon carbide (SiC) and graphite. The mixture formed by mixing the four raw materials contains five elements Ca, Ba, C, Al and Si, the mass percentages of these five elements in the mixture are Ca 1-5%, Ba 2-7%, C 15-45%, Al 5-30%, and Si 20-55%. The preferred percentages are: Ca 1-2.5%, Ba 2-5.5%, C 25-45%, Al 10-30%, Si 20-45%. More preferable percentages are 1 to 1.5% of Ca, 2 to 3.5% of Ba, 35 to 45% of C, 20 to 30% of Al, and 20 to 30% of Si. By the above-mentioned percentages of the five elements, the respective percentages of each raw material in the mixture can be deduced according to the purity of the four raw materials, thereby converting the percentages of the five elements that affect the effect of the present invention into four The percentage of each r...

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Abstract

The invention discloses an LF compound deoxidation reducing agent, which is made by compounding aluminium grain (AL), silicon-aluminum-barium alloy (SiCaBa), carborundum (SiC) and graphite. The compound contains Ca, Ba, C, Al and Si which have the weight proportions in the compound of: 1-5 percent of Ca, 2-7 percent of Ba, 15-45 percent of C, 5-30 percent of Al, 20-55 percent of Si. The LF compound deoxidation reducing agent can be used for LF refining molten steel and the beneficial effects can be brought out: 1. the average content of out-station molten steel (O) is 20-30 ppm, and reoxidation is lowered; 2. the average desulfurization rate is above 50 percent; 3. the content of inclusion is lowered greatly; 4. submerged-arc time is greatly shortened; 5. electric consumption of 1.5 DEG C is shortened to produce one-ton steel; 6. qualified rate of defects detection is above 95 percent. The invention has higher economic and social benefits and has good application prospect.

Description

technical field [0001] The invention relates to an LF composite deoxidizing reducing agent, which is mainly used in the ladle furnace (LF) of the refining workshop of a steelmaking plant, mainly for the rapid establishment of a reducing atmosphere in the secondary refining process of molten steel and shortening the white slag (reducing slag state) Deep deoxidation, desulfurization and adsorption of inclusions are carried out on the molten steel in the LF furnace. Background technique [0002] With the continuous development of steelmaking technology, the smelting of pure steel, low-sulfur steel and ultra-low-sulfur steel has put forward higher requirements for secondary refining technology. The secondary refining of molten steel is mostly refined by LF furnace. The LF furnace refining method was first developed by Japan Special Steel Company in 1971. It was mainly used for refining special steel. It is a kind of arc heating, argon stirring and slag refining. Ladle furnace r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C7/04
Inventor 陈浩熊银成胡兵邱家富陶权
Owner CHONGQING IRON & STEEL (GRP) CO LTD
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