A method for comprehensive utilization of vanadium-titanium magnetite by deep reduction short-process smelting
A vanadium-titanium magnetite and short-process technology, which is applied in the field of metallurgy, can solve the problems of low comprehensive resource utilization, high energy consumption in the smelting process, and strong dependence on coke, achieving significant economic benefits, alleviating the shortage of coke resources, and reducing production cost effect
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Embodiment 1
[0030] Process such as figure 1 shown;
[0031] The main components of vanadium-titanium magnetite are: TFe 55.88%, FeO 13.03%, V 2 o 5 0.55%, TiO 2 9.28%, SiO 2 6.14%, Al 2 o 3 2.37%, CaO 1.08%, MgO 1.52%, P 0.13%, S<0.004%;
[0032] Crush the vanadium-titanium magnetite to a particle size of ≤15mm to make vanadium-titanium magnetite powder; crush the reducing agent to a particle size of ≤10mm to obtain a reducing agent powder; crush the solvent limestone to a particle size of ≤20mm to obtain limestone powder ; The reducing agent is blue carbon; the mass percentage of fixed carbon in the reducing agent is ≥ 80%; the mass percentage of calcium oxide in limestone is ≥ 40%;
[0033] Mix vanadium-titanium magnetite powder, reducing agent powder and limestone powder evenly to make mixed powder; in the mixed powder, the mass ratio of vanadium-titanium magnetite powder and reducing agent powder is 1:0.34, vanadium-titanium magnetite powder The mass ratio with limestone po...
Embodiment 2
[0041] Method is with embodiment 1, and difference is:
[0042] (1) The main components of vanadium-titanium magnetite are: TFe 62.77%, FeO 10.03%, V 2 o 5 0.87%, TiO 2 6.24%, SiO 2 2.14%, Al 2 o 3 1.20%, CaO 2.12%, MgO 1.02%, P 0.13%, S<0.004%;
[0043] (2) In the mixed powder, the mass ratio of vanadium-titanium magnetite ore powder and reducing agent powder is 1:0.5, and the mass ratio of vanadium-titanium magnetite ore powder and limestone powder is 1:0.3; Reductant is anthracite;
[0044] (3) The mixed powder is discharged after staying in the rotary kiln for 40 minutes to obtain a preheated pre-reduced material with a temperature of 870° C.; the iron metallization rate in the discharged pre-reduced material is 70%;
[0045] (4) The injection rate of pulverized coal is 0.7 times of the total mass of vanadium-titanium-magnetite powder;
[0046] (5) In the process of deep reduction and smelting, the temperature in the melting furnace is controlled at 1400°C, the res...
Embodiment 3
[0049] Method is with embodiment 1, and difference is:
[0050] (1) The main components of vanadium-titanium magnetite are: TFe 47.76%, FeO 9.81%, V 2 o 5 1.47%, TiO 2 20.01%, SiO 2 4.17%, Al 2 o 3 3.35%, CaO 1.08%, MgO 1.52%, P 0.13%, S<0.004%;
[0051] (2) In the mixed powder, the mass ratio of vanadium-titanium magnetite ore powder and reducing agent powder is 1:0.3, and the mass ratio of vanadium-titanium magnetite ore powder and limestone powder is 1:0.26; Reductant is anthracite;
[0052] (3) The mixed powder is discharged after staying in the rotary kiln for 25 minutes to obtain a preheated pre-reduced material with a temperature of 650° C., and the iron metallization rate in the reduced material is 40%;
[0053] (4) The injection amount of pulverized coal is 0.6 times of the total mass of vanadium-titanium-magnetite powder;
[0054] (5) In the process of deep reduction and smelting, the temperature in the melting furnace is controlled at 1700°C, the residence...
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