Method for preparing molten iron by utilizing oxygen top blown smelting reduction ironmaking
A technology of oxygen top blowing and molten iron, applied in the fields of energy and metallurgy, can solve the problems of declining market competitiveness of enterprises, rising steel production costs, low thermal efficiency, etc., achieving the effect of achieving clean production, reducing infrastructure investment and short construction period
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Embodiment 1
[0034] Iron ore (main chemical composition / %: TFe=58.08, CaO=1.46, MgO=1.97, SiO 2=8.02, S=0.23, P=0.17) broken to 2-25mm, the flux and anthracite (main chemical composition / %: volatile matter (VM)=6.86, fixed carbon (FC)=80.63, ash content=11.61, analysis Water = 0.81) is broken to 2-25mm, and then the data obtained from the batching calculation are fully mixed and added to the smelting reduction furnace from the feed port on the furnace top. The furnace temperature is maintained at 1550 ° C ~ 1750 ° C during normal production. The pressure is maintained at 0.2-1MPa. After one cycle (3 hours) of reaction, high-quality molten iron containing P<0.015% can be obtained. Since only about 20% of S can be removed during the reaction process, the molten iron must be After desulfurization treatment, it is sent to the steelmaking workshop.
Embodiment 2
[0036] Iron ore (main chemical composition / %: TFe=51.5, CaO=2.25, MgO=3.13, SiO 2 =12.5, S=0.2, P=0.15) broken to 2-25mm, the flux and lean coal (main chemical components / %: volatile matter (VM)=13.42, fixed carbon (FC)=76.07, ash content=10.21, Analysis water = 2) Broken to 2-25mm, and then the data obtained from batching calculation are fully mixed and evenly added to the smelting reduction furnace from the feed port on the top of the furnace. The blowing pressure is maintained at 0.2-1MPa. After one cycle (3 hours) of reaction, a high-quality molten iron containing P<0.013% can be obtained. Since only about 20% of S can be removed during the reaction process, the molten iron must be removed before entering the next process. After desulfurization treatment, it is sent to the steelmaking workshop.
Embodiment 3
[0038] Iron ore (main chemical composition / %: TFe=57.79, CaO=2.53, MgO=2.07, SiO 2 =9.72, S=0.25, P=0.08) broken to 2-25mm, the flux and reduced coal (main chemical components / %: volatile matter (VM)=7.06, fixed carbon (FC)=82.03, ash content=10.06, Analytical water = 1.71) is broken to 2-25mm, and then the data obtained from the batching calculation are fully mixed and added to the smelting reduction furnace from the feed port on the furnace top. The blowing pressure is maintained at 0.2-1MPa. After one cycle (3 hours) of reaction, a high-quality molten iron containing P<0.015% can be obtained. Since only about 20% of S can be removed during the reaction process, the molten iron must be removed before entering the next process. After desulfurization treatment, it is sent to the steelmaking workshop.
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