Method for vanadium tailings sodium removal after sodium salt roasting of vanadium titano-magnetite through dilute acid dump leaching
A technology for extracting vanadium-titanium magnetite and vanadium tailings, which is applied in the field of hydrometallurgy, can solve the problem of high process cost, and achieve the effect of high-efficiency removal
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[0030] Example 1
[0031] This embodiment uses vanadium-titanium magnetite sodium calcination to extract vanadium tailings containing Fe 2 O 3 70.02%, containing Na 2 O 1.02%.
[0032] (1) Pile of vanadium-titanium magnetite tailings from sodium roasting for vanadium extraction, the pile height is 4m;
[0033] (2) Distribute the dilute sulfuric acid solution with a mass concentration of 0.2wt% evenly on the pile by spraying, with a spray intensity of 3L / (m 2 ·H), then collect the leaching liquid from the heap leaching solution collection pipeline into the sump, add acid to adjust the acidity, and then return to the tailings pile for solution circulation leaching;
[0034] (3) After 20 days of heap leaching, simply wash the vanadium extraction tailings with water. The volume-mass ratio of the washing process water to the vanadium extraction tailings is 0.5:1, the washing temperature is normal temperature, and the sodium content is 0.17% (in Na 2 O) tailings are used as rich iron ore for...
Example Embodiment
[0035] Example 2
[0036] This embodiment uses vanadium-titanium magnetite sodium calcination to extract vanadium tailings containing Fe 2 O 3 65.26%, containing Na 2 O 2.13%.
[0037] (1) Pile of vanadium-titanium magnetite tailings from sodium roasting for vanadium extraction, the pile height is 12m;
[0038] (2) Dilute sulfuric acid solution with a mass concentration of 1wt% is evenly distributed on the pile by drip irrigation, with a strength of 20L / (m 2 ·H), then collect the leaching liquid from the heap leaching solution collection pipeline into the sump, add acid to adjust the acidity, and then return to the tailings pile for solution circulation leaching;
[0039] (3) After 30 days of heap leaching, simply wash the vanadium extraction tailings with water. The volume mass ratio of the washing process water to the vanadium extraction tailings is 2:1, the washing temperature is 80°C, and the sodium content is 0.15% (in Na 2 O) tailings are used as rich iron ore for subsequent util...
Example Embodiment
[0040] Example 3
[0041] This embodiment uses vanadium-titanium magnetite sodium calcination to extract vanadium tailings containing Fe 2 O 3 69.87%, containing Na 2 O 1.56%.
[0042] (1) Pile of tailings of vanadium-titanium magnetite from sodium roasting for vanadium extraction, the pile height is 8m;
[0043] (2) Dilute sulfuric acid solution with a mass concentration of 2wt% is evenly distributed on the pile by drip irrigation, with a strength of 8L / (m 2 ·H), then collect the leaching liquid from the heap leaching solution collection pipeline into the sump, add acid to adjust the acidity, and then return to the tailings pile for solution circulation leaching;
[0044] (3) After 40 days of heap leaching, simply wash the vanadium extraction tailings with water. The volume mass ratio of the washing process water to the vanadium extraction tailings is 1:1, and the washing temperature is 40°C. The sodium content is 0.14% (in Na 2 O) tailings are used as rich iron ore for subsequent uti...
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