Method for lowering high-vanadium-titanium molten iron blowing desulfurization drossing iron loss
A technology of desulfurization slag and molten iron, applied in the field of iron and steel metallurgy, can solve the problems of increasing smelting cost, increasing cost burden, and expensive cryolite, and achieve the effect of reducing steel material consumption, reducing smelting cost, and improving slag state
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Embodiment 1
[0019] 1. The weight percentage of molten iron before desulfurization is controlled at: C 3.9%, Mn 0.33%, V 0.50%, Si 0.40%, S 0.12%, P 0.05%, Ti 0.30%, and the remainder is iron and unavoidable impurities. The temperature of molten iron before desulfurization is 1340°C.
[0020] 2. Before desulfurization, argon gas is used as the carrier, and Ca+Mg powder is used as the desulfurizing agent for blowing desulfurization.
[0021] 3. Add slagging agent to the molten iron at a rate of 0.8kg per ton of iron and stir, and then desulfurize.
[0022] 4. After the desulfurization is completed, at one end of the molten iron slag surface of the slag removal station, install 2 air jet guns to blow the argon gas at a pressure of 4atm and 60Nm 3 The flow rate of / h is sent into molten iron, and the insertion depth is controlled at 150mm.
[0023] 5. Remove slag from the desulfurized molten iron. When the remaining amount of desulfurized slag is 1 / 4 of the original desulfurized slag, add a...
Embodiment 2
[0027] 1. The composition weight percentage of molten iron before desulfurization is controlled at: C 4.2%, Mn 0.25%, V 0.35%, Si 0.20%, S 0.08%, P 0.09%, Ti 0.22%, the remainder is iron and unavoidable impurities; before desulfurization The temperature of molten iron is 1290°C.
[0028] 2. Before desulfurization, the nitrogen-argon mixed gas is used as the carrier, and Ca+Mg powder is used as the desulfurizing agent for desulfurization, and the volume ratio of argon in the nitrogen-argon mixed gas is 65%.
[0029] 3. Add slagging agent to molten iron at a rate of 0.5kg per ton of iron and stir, then desulfurize.
[0030] 4. After the desulfurization is completed, at one end of the molten iron slag surface of the slag removal station, install 4 air jet guns to inject nitrogen and argon mixed gas at a pressure of 8atm and 100Nm 3 The flow rate of / h is sent into molten iron, and the insertion depth is controlled at 100mm.
[0031] 5. Remove slag from the desulfurized molten i...
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