Steelmaking method with high waste steel consumption in semisteel smelting
A high scrap steel and steel smelting technology, applied in the field of metallurgy, can solve the problems of insufficient heat source for semi-steel steelmaking, low scrap steel consumption, low scrap steel recovery rate, etc., to solve the process of residual slag cooling, fast slag formation, and increase scrap steel production. The effect of consumption
Pending Publication Date: 2021-09-28
PANGANG GROUP RESEARCH INSTITUTE CO LTD
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Problems solved by technology
[0007] The technical problem to be solved by the present invention is that the heat source of semi-steel making in the prior art is insufficient, the consumption of scrap steel is low, and the recovery rate of scrap steel is low
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[0039] A 120t converter in a factory is smelted with vanadium-titanium molten iron, and the steel output is 132t / furnace. The process flow provided by the present invention is used for smelting. The process flow is: half-steel tank after steelmaking converter is mixed with iron → adding scrap steel → pouring continuous casting ladle Casting slag→Semi-steel pots containing steel scrap and casting slag are sent to the vanadium extraction converter to receive semi-steel→Mix the scrap steel, casting slag and semi-steel in the semi-steel tank into the converter→Converter steelmaking.
[0040] Add 30kg of steel scrap to the empty semi-steel tank after the iron mixing in the previous furnace. The weight of a single piece of scrap steel is not higher than 10kg. Slag composition is FeO: 5%, CaO: 40%, SiO 2 :15%, Al 2 o 3 :10%, MgO:10%, CaF 2 : 1.5%, MnO: 1.5%, and the rest are impurities. Lift the semi-steel tank to the vanadium extraction furnace to accept the semi-steel after van...
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The invention relates to a steelmaking method with high waste steel consumption in semisteel smelting, and belongs to the technical field of metallurgy. The steelmaking method comprises the following steps: a, waste steel is added into a semi-steel tank of a steelmaking converter after iron is added into the semi-steel tank; b, steel ladle casting residues obtained after continuous casting are added into the semi-steel tank containing waste steel; c, the semi-steel tank is hoisted to a vanadium extraction furnace to receive semi-steel after vanadium extraction; and d, converter steelmaking is conducted, specifically, all slag remaining of the previous converter is kept, waste steel is added into the converter again after slag remaining and before iron adding, and a slag former is added. According to the novel steelmaking method, a special semi-steel smelting technological process is utilized, steel ladle casting residues and semi-steel tank waste heat are fully utilized to preheat the waste steel, and then converter steelmaking is carried out, the maximum utilization of casting residue waste resources is achieved, and meanwhile the multiple purposes of improving steel-making converter waste steel consumption and reducing auxiliary material consumption are achieved. The problems that in the prior art, semisteel steelmaking heat sources are insufficient, waste steel consumption is low, and slagging is slow are solved.
Description
technical field [0001] The invention relates to a steelmaking method for semi-steel smelting with high scrap steel consumption, belonging to the technical field of metallurgy. Background technique [0002] Panzhihua Iron and Steel uses vanadium-titanium magnetite for smelting. The main raw material for converter steelmaking is semi-steel after vanadium extraction through a special converter. 3.8%, the semi-steel temperature fluctuates between 1250-1320°C, with an average of less than 1300°C, and the content of silicon and manganese heating elements in the semi-steel are traces, so the semi-steel smelting heat source is seriously insufficient, and the steelmaking converter scrap consumption The average amount is only about 30kg per ton of steel. In the case of limited iron-making capacity, low steel scrap prices and good steel prices, increasing scrap steel consumption is the preferred way to increase production and generate income. [0003] In the prior art, there have bee...
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Login to View More IPC IPC(8): C21C5/28
CPCC21C5/28C21C5/565Y02P10/20
Inventor 陈均梁新腾陈炼
Owner PANGANG GROUP RESEARCH INSTITUTE CO LTD