Method for reducing titanium content in vanadium-titanium magnetite concentrate
A vanadium-titanium magnetite concentrate and titanium content technology, applied in the field of metallurgy, can solve the problems of low utilization rate of smelting blast furnaces, waste of titanium resources, and inability to economically recycle, and achieve the goal of improving the utilization factor of blast furnaces, reducing operating costs, and reducing environmental pollution Effect
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Embodiment 1
[0030] A method for reducing titanium content in vanadium-titanium magnetite concentrate, comprising the steps of:
[0031] S1, preparing mixed acid composite leaching agent;
[0032] 2 parts by weight of formic acid, 1.6 parts by weight of acetic acid, 5 parts by weight of phthalic acid and 5 parts by weight of iminooxalic acid were mixed and heated and stirred at a heating temperature of 40°C and a stirring time of 10 minutes to obtain an organic acid Mixed acid; then keep warm at 40°C. During the heat preservation process, add 45 parts by weight of sulfuric acid and 5 parts by weight of ammonium bifluoride to the organic acid mixed acid to obtain the mixed acid composite leaching agent after 30 minutes of heat preservation.
[0033] S2. Mix the mineral with the mixed acid composite leaching agent obtained in step S1 in a weight ratio of 1:5, and perform a selective leaching reaction. The time for the selective leaching reaction is 17 hours, and the temperature is 80° C.;
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Embodiment 2
[0037] A method for reducing titanium content in vanadium-titanium magnetite concentrate, comprising the steps of:
[0038] S1, preparing mixed acid composite leaching agent;
[0039] 1.8 parts by weight of formic acid, 1 part by weight of acetic acid, 3.6 parts by weight of phthalic acid and 3.6 parts by weight of iminooxalic acid were mixed and heated and stirred at a heating temperature of 40°C and a stirring time of 10 minutes to obtain an organic acid Mixed acid; then keep warm at 40°C. During the heat preservation process, add 40 parts by weight of sulfuric acid and 2.7 parts by weight of ammonium bifluoride to the organic acid mixed acid, and obtain the mixed acid composite leaching agent after being kept warm for 30 minutes.
[0040] S2. Mix the mineral with the mixed acid composite leaching agent obtained in step S1 in a weight ratio of 1:1, and perform a selective leaching reaction. The time of the selective leaching reaction is 0.5h, and the temperature is 70°C;
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Embodiment 3
[0044]A method for reducing titanium content in vanadium-titanium magnetite concentrate, comprising the steps of:
[0045] S1, preparing mixed acid composite leaching agent;
[0046] 2 parts by weight of formic acid, 2 parts by weight of acetic acid, 6 parts by weight of phthalic acid and 6 parts by weight of iminooxalic acid were mixed and heated and stirred at a heating temperature of 40°C and a stirring time of 10 minutes to obtain an organic acid Mixed acid; then keep warm at 40°C. During the heat preservation process, add 50 parts by weight of sulfuric acid and 7.3 parts by weight of ammonium bifluoride to the organic acid mixed acid, and obtain the mixed acid composite leaching agent after 30 minutes of heat preservation.
[0047] S2. Mix the mineral with the mixed acid composite leaching agent obtained in step S1 at a weight ratio of 1:10, and perform a selective leaching reaction. The time for the selective leaching reaction is 720 hours, and the temperature is 90° C.;...
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