Method for extracting vanadium from stone coal pickle liquor
A technology of acid leaching solution and stone coal, which is applied in the field of vanadium metallurgy, can solve the problems of rising production cost of vanadium extraction from stone coal, unfavorable development and environmental protection, and increased difficulty in recycling, so as to eliminate adverse effects and reduce reagent consumption , to avoid the effect of consumption
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[0050] Example 1
[0051] step one
[0052] After removing aluminum, containing V1.81g / L, Fe T 10.53g / L (Fe T It represents the total concentration of iron element), Fe(III) 4.92g / L lime coal acid leaching solution 10L, stir and add limestone milk to adjust the pH to 1.5, filter, and use P204-kerosene system as the organic phase for the filtrate. The concentration of P204 is 20v / v%. According to O / A (volume ratio of organic phase and water phase) = 1:0.5, three-level contact extraction is carried out to remove iron, to obtain an organic phase containing Fe(III) and V(IV). After iron removal, the Fe(III) and V(IV)-containing organic phase contains Fe 7.23g / L and V(IV)-containing organic phase; the Fe(III)-containing V(IV)-containing organic phase 0.5mol / LH first 2 SO 4 The solution eluted the co-extracted vanadium to obtain an eluate containing V(IV) and an organic phase containing Fe(III); the obtained eluate containing V(IV) was acidified with sulfuric acid to obtain an acidified...
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[0064] Example 2
[0065] step one
[0066] After removing aluminum, containing V3.83g / L, Fe T 7.65g / L, Fe(III)2.52g / L lime coal acid leaching solution 4L, stir and add CaCO 3 Adjust the pH to 0.7, filter, and use P507-TBP-kerosene system as the organic phase for the filtrate. The concentration of P507 in the organic phase is 15v / v%, according to O / A (volume ratio of organic phase to water phase) = 1: 1 Perform four-stage contact extraction to remove iron to obtain an organic phase containing Fe(III) and V(IV) and a post-iron removal liquid. The organic phase containing Fe(III) and V(IV) contains Fe3.5g / L, containing V0.17g / L; the organic phase containing Fe(III) and V(IV) is first subjected to 0.3mol / LH 2 SO 4 The solution eluted the co-extracted vanadium to obtain an eluate containing V(IV) and an organic phase containing Fe(III); the obtained eluate containing V(IV) was acidified with sulfuric acid to obtain an acidified eluate containing V(IV) , Containing V (IV) H in acidifi...
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[0078] Example 3
[0079] step one
[0080] After removing aluminum, containing V4.57g / L, Fe T 8.41g / L, Fe(III) 2.62g / L lime coal acid leaching solution 2500ml, stir and add ammonia water to adjust the pH value to 1.3, filter, the filtrate uses Cyanex272-TBP-kerosene system as the organic phase, the concentration of Cyanex272 in the organic phase 10v / v%, according to O / A (volume ratio of organic phase to water phase) = 1:2 for five-stage contact extraction to remove iron, to obtain an organic phase containing Fe(III) and V(IV) and after removing iron The organic phase containing Fe(III) and V(IV) contains Fe 3.48g / L and V0.22g / L; the organic phase containing Fe(III) and V(IV) is first subjected to 0.8 mol / LH 2 SO 4 The solution eluted the co-extracted vanadium to obtain an eluate containing V(IV) and an organic phase containing Fe(III); the obtained eluate containing V(IV) was acidified with sulfuric acid to obtain an acidified eluate containing V(IV) , Containing V (IV) H in aci...
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