Molten steel predeoxidation process in molten iron steel refining converter
A steelmaking converter and pre-deoxidation technology, applied in the field of metallurgical steelmaking, can solve problems such as unsatisfactory deoxidation efficiency, achieve the effect of guaranteeing cutting performance and welding performance, and improving deoxidation efficiency
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Embodiment 1
[0026] 1) At the end of steelmaking converter smelting, a vacuum deoxidation process is first performed on the converter for vacuum deoxidation. Based on 100 tons of molten steel, the converter is pumped to a vacuum of 67-70pa. The balance of carbon and oxygen in the molten steel is destroyed, causing Carbon and oxygen continue to react to form carbon monoxide gas, and the bubbles of carbon monoxide float up to drive the stirring of the molten steel, making the composition and temperature environment of the molten steel in the converter tend to a balanced state; until the carbon in the molten steel reaches below 0.01%;
[0027] 2) Put 9 tons of SiC and 9 tons of CaC2 into the converter, and carry out a diffusion deoxidation process by means of bottom blowing argon stirring.
[0028] 3) Put 5 tons of CaC2 deoxidizer into the converter again, and carry out a deoxidation process by means of bottom blowing argon stirring, the blowing flow rate of bottom blowing argon stirring is 0....
Embodiment 2
[0033] 1) At the end of steelmaking converter smelting, a vacuum deoxidation process is first performed on the converter for vacuum deoxidation. Based on 100 tons of molten steel, the converter is evacuated to a vacuum of 130-134pa. The balance of carbon and oxygen in the molten steel is destroyed, causing Carbon and oxygen continue to react to form carbon monoxide gas, and the bubbles of carbon monoxide float up to drive the stirring of the molten steel, making the composition and temperature environment of the molten steel in the converter tend to a balanced state until the carbon in the molten steel reaches below 0.01%;
[0034] 2) Put 10 tons of SiC and 10 tons of CaC2 into the converter, and carry out a diffusion deoxidation process by means of bottom blowing argon stirring, the flow rate of bottom blowing argon stirring is 0.5Nm3 / min, and the blowing time of argon is 10min;
[0035] 3) Put 8 tons of deoxidizer CaC2 into the converter again, and carry out a deoxidation pro...
Embodiment 3
[0040] 1) At the end of the steelmaking converter smelting, a vacuum deoxidation process is first performed on the converter for vacuum deoxidation. Based on 100 tons of molten steel, the converter is evacuated to a vacuum of 100-105pa. The balance of carbon and oxygen in the molten steel is destroyed, causing Carbon and oxygen continue to react to form carbon monoxide gas, and the bubbles of carbon monoxide float up to drive the stirring of the molten steel, making the composition and temperature environment of the molten steel in the converter tend to a balanced state until the carbon in the molten steel reaches below 0.01%;
[0041] 2) Put 9.5 tons of SiC and 9.5 tons of CaC2 into the converter, the gas blowing flow rate of bottom blowing argon stirring is 0.4Nm3 / min, the blowing time of argon gas is 8min, and the method of bottom blowing argon stirring is used to carry out a diffusion deoxidation process;
[0042] 3) Put 6 tons of deoxidizer CaC2 into the converter again, a...
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Abstract
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