Method for smelting reinforced bar steel with low cost
A low-cost technology for reinforced steel, applied in the field of metallurgy, can solve the problems of high cost of reinforced steel, achieve the effects of reducing smelting costs, increasing the strength of steel bars, and increasing the oxidation resistance
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Embodiment 1
[0022] The semi-steel composition is: C: 3.40%, P: 0.070%, S: 0.020%, V: 0.050%, 120t converter smelting, the last furnace will leave the slag at the end of the converter, after the converter is mixed with the semi-steel, the blowing is started At the same time, 40-50kg / t of waste slag at the end of the converter that has been crushed and screened is added to the furnace. The distance between the oxygen lance nozzle and the metal liquid level of the molten pool is 1.4-2m, and the blowing lance is 1.4m-1.8m. The position of the blowing gun is 2m to prevent the gun from burning, and the position of the carbon pulling gun is 1.4m to ensure that the slag has good fluidity, so as to dissolve the slag early, remove more phosphorus and protect the furnace lining; when the oxygen blowing progress is 0-40%, the oxygen lance Oxygen supply intensity is 2.5~3.0m 3 / t·min, the oxygen blowing progress is 40% to the end of blowing, and the oxygen supply intensity of the oxygen lance is 3.5~4...
Embodiment 2
[0028]The semi-steel composition is: C: 3.40%, P: 0.070%, S: 0.020%, V: 0.050%, 120t converter smelting, the last furnace will leave the slag at the end of the converter, after the converter is mixed with semi-steel, it will start blowing At the same time, 40-50kg / t of waste slag at the end of the converter that has been crushed and screened is added to the furnace. The distance between the oxygen lance nozzle and the metal liquid level of the molten pool is 1.4-2m, and the blowing lance is 1.4m-1.8m. The position of the blowing gun is 2m to prevent the gun from burning, and the position of the carbon pulling gun is 1.4m to ensure that the slag has good fluidity, so as to dissolve the slag early, remove more phosphorus and protect the furnace lining: when the oxygen blowing progress is 0-40%, the oxygen lance The oxygen supply intensity is 2.5-3.0m 3 / t·min, the oxygen blowing progress is 40% to the end of blowing, and the oxygen supply intensity of the oxygen lance is 3.5-4.5...
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