Production method of low-carbon low-silicon aluminum killed molten steel

Abstract

The invention discloses a production method of low-carbon low-silicon aluminum killed molten steel. The production method mainly solves the technical problems of poor cleanliness and high deoxidationcost of the low-carbon low-silicon aluminum killed molten steel produced and smelted through a converter in the prior art. According to the technical scheme, the production method of the low-carbon low-silicon aluminum killed molten steel comprises the following steps that a top-bottom combined blowing converter is adopted for smelting, wherein metal main raw materials are composed of, in percentage by mass, 75%-100% of molten iron, and the balance waste steel; the smelting end point of the converter is controlled, and the w [ C ] and the temperature in the molten steel at the converter blowing end point are detected; molten steel tapping is immediately carried out after converter blowing is ended; the molten steel in a steel ladle is transported to an argon blowing station for molten steel temperature regulation and molten steel aluminum content regulation, and weak stirring is carried out on the molten steel with aluminum wires fed. The low-carbon low-silicon aluminum killed steel molten steel produced by the production method is high in cleanliness and low in deoxidation cost.

Description

technical field [0001] The invention relates to a production method of aluminum-killed steel, in particular to a production method of low-carbon and low-silicon aluminum-killed molten steel, which belongs to the technical field of steel smelting and continuous casting. Background technique [0002] The market demand for low-carbon, low-silicon, aluminum-killed steel has always been great, and many steel mills at home and abroad are producing it. The representative steel type is SPHC steel. Generally, SPHC steel requires high stamping formability, and the market demand is very large, which belongs to low-carbon aluminum-killed steel. In the prior art, the deoxidation treatment process of molten steel for smelting low-carbon, low-silicon, aluminum-killed steel in the converter is that during the alloying process of the converter tapping, 2.4-4.8 kg / t of aluminum-iron alloy is added to fully deoxidize the molten steel, and the aluminum content in the molten steel is 0.015%. Ab...

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Problems solved by technology

[0006] The purpose of the present invention is to provide a production method of low-carbon, low-silicon, aluminum-killed molten steel, which mainly solves the technical problems of poor cleanliness and high deoxidation cost of low-carbon, low-silicon, aluminum-killed molten steel produced by converter smelting in the prior art; The invented method realizes the improvement of the cleanliness of low-carbon, low-silicon and aluminum-killed molten steel and the substantial reduction of deoxidation cost

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