Vanadium-titanium magnetite concentrate method by using calcinations, oxidation by alkaline leaching, grading and magnetic gravitational reselection
A vanadium-titanium-magnetite concentrate and magnetic-gravity combined technology, which is applied in chemical instruments and methods, solid separation, wet separation, etc., to achieve the effects of reducing emissions, improving the utilization factor of blast furnaces, and improving comprehensive utilization.
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Embodiment 1
[0041] Such as figure 1 shown.
[0042] 1) Oxidative alkaline leaching
[0043] The TFe content is 52.5%, TiO 2 The content is 12.8%, SiO 2 The content is 4.79%, Al 2 o 3 The vanadium-titanium magnetite concentrate with a content of 4.93% and a S content of 0.73% is placed in a NaOH alkali solution with a mass concentration of 10%, and 55psi of O 2 , then alkali leaching reaction at a temperature of 240°C for 2.0 hours, the reactant was filtered to obtain the filtrate and alkali leaching filter cake A, the NaOH consumption was 81.9 kg / t to the ore, and the filtrate was fed into the recovery treatment system, which The chemical reaction formula is:
[0044] 4mFeTiO 3 +8NaOH +mO 2 2mFe 2 o 3 ↓+4Na 2 O·(TiO 2 ) m ↓+4H 2 O m≥1
[0045] pFe 3 o 4 q (FeO TiO 2 ) +2rNaOH pFe 3 o 4 ↓+qFeO↓+ (Na 2 O) r ·(TiO 2 ) q ↓+rH 2 o
[0046] Al 2 o 3 +2NaOH 2NaAlO 2 + H 2 o
[0047] tSiO 2 +2NaOH Na 2 O (SiO 2 ) t ↓ + H 2 o
[0048] 3FeS 2 +6NaOH ...
Embodiment 2
[0059] Such as figure 1 shown.
[0060] 1) Oxidative alkaline leaching
[0061] The TFe content is 51.3%, TiO 2 The content is 11.9%, SiO 2 The content is 4.70%, Al 2 o 3 The vanadium-titanium magnetite concentrate with a content of 4.96% and a S content of 0.85% was placed in a NaOH alkali solution with a mass concentration of 17%, and 113psi of O 2 , then alkali leaching reaction at a temperature of 225° C. for 2.0 hours, and the reactants were filtered to obtain the filtrate and alkali leaching filter cake A. The NaOH consumption was 80.8 kg / t for ore feeding, and the filtrate was fed into the recovery treatment system, which Chemical reaction formula is with embodiment 1;
[0062] 2) Grading
[0063] Add water to the medium-alkali leaching filter cake A in step 1) to form a slurry with a mass concentration of 21% and put it into the cyclone for classification, and classify the grit B and overflow Y;
[0064] 3) Combined magnetic gravity beneficiation
[0065] Ad...
Embodiment 3
[0069] Such as figure 1 shown.
[0070] 1) Oxidative alkaline leaching
[0071] The TFe content is 50.4%, TiO 2 The content is 14.6%, SiO 2 The content is 4.72%, Al 2 o 3 The vanadium-titanium magnetite concentrate with a content of 4.69% and a S content of 0.66% is placed in a NaOH alkali solution with a mass concentration of 23%, and 196kg / t of 给矿 H 2 o 2 , then alkali leaching reaction at a temperature of 250° C. for 1.0 hour, and the reactants were filtered to obtain filtrate and alkali leaching filter cake A. The NaOH consumption was 79.3 kg / t for ore feeding, and the filtrate was fed into the recovery treatment system, which The chemical reaction formula is:
[0072] 2mFeTiO 3 +4NaOH+mH 2 o mFe 2 o 3 ↓+2Na 2 O·(TiO 2 ) m ↓+(m+2)H 2 O m≥1
[0073] pFe 3 o 4 q (FeO TiO 2 ) +2rNaOH pFe 3 o 4 ↓+qFeO↓+ (Na 2 O) r ·(TiO 2 ) q ↓+rH 2 o
[0074] al 2 o 3 +2NaOH 2NaAlO 2 + H 2 o
[0075] tSiO 2 +2NaOH Na 2 O (SiO 2 ) t ↓ + H 2 o
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