Vanadium extraction method adopting sectioned gas supply, of converter
A segmented, converter technology, applied in the manufacture of converters, etc., can solve the problems of low vanadium oxidation rate, high carbon oxidation rate, large amount of coolant, etc., to achieve improved oxidation rate, simple operation, and reduced resource utilization. Effect
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Embodiment 1
[0040] After the molten iron enters the 200t re-blowing converter, during the blowing period, blowing is carried out at a gun position 1.5m away from the metal liquid surface; the first stage is blowing with pure oxygen, the oxygen pressure is controlled at 0.65MPa, and the gas supply intensity is controlled at 2.4 m 3 / (min·t vanadium-containing molten iron), the blowing time is 3.0min, the coolant is added at 2.5min, and the addition amount is 18kg / t vanadium-containing molten iron; the second stage uses nitrogen for blowing, and the nitrogen pressure is controlled at 0.85 MPa, air supply strength 3.5m 3 / (min·t vanadium-containing molten iron), the blowing time is 2.0min; the third stage uses pure oxygen for blowing, the oxygen pressure is controlled at 0.72MPa, and the gas supply intensity is 3.6m 3 / (min·t vanadium-containing molten iron), the blowing time is controlled at 2.0min; the flow rate of bottom blowing gas in the non-blowing stage is controlled at 0.001m 3 / (m...
Embodiment 2
[0043] After the molten iron enters the 200t converter, a top-blown oxygen lance is used for gas injection, and the position of the lance is controlled at a distance of 1.8m from the metal liquid surface; the blowing process is divided into three stages, the first stage uses pure oxygen for blowing, and the oxygen pressure is controlled At 0.75MPa, the gas supply strength is 3.6m 3 / (min·t vanadium-containing molten iron), the blowing time is 2.5min, the amount of coolant is 20kg / t vanadium-containing molten iron; the second stage uses nitrogen for blowing, the nitrogen pressure is controlled at 0.70MPa, and the gas supply intensity is controlled at 2.5m 3 / (min·t vanadium-containing molten iron), the blowing time is 3.0min; the third stage uses pure oxygen for blowing, the oxygen pressure is controlled at 0.68MPa, and the gas supply intensity is 2.4m 3 / (min·t vanadium-containing molten iron), blowing time is 2.5min; semi-steel and vanadium slag are produced after three stage...
Embodiment 3
[0046] After the molten iron enters the 120t converter, a top-blown oxygen lance is used for gas injection, and the position of the lance is controlled at a distance of 1.7m from the metal liquid surface; the blowing process is divided into three stages, the first stage uses pure oxygen for blowing, and the oxygen pressure is controlled At 0.68MPa, the gas supply strength is 3.0m 3 / (min·t vanadium-containing molten iron), the blowing time is controlled at 2.6min, the amount of coolant is 15kg / t vanadium-containing molten iron; the second stage uses nitrogen for blowing, the nitrogen pressure is controlled at 0.72MPa, and the gas supply intensity is 3.0m 3 / (min·t vanadium-containing molten iron), the blowing time is controlled at 2.5min; the third stage uses pure oxygen for blowing, the oxygen pressure is controlled at 0.70MPa, and the gas supply intensity is controlled at 3.0m 3 / (min·t vanadium-containing molten iron), the blowing time is controlled at 2.3min; semi-steel an...
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