Method for extracting valuable metal from cobalt metallurgical waste
A metallurgical waste, valuable metal technology, applied in the direction of process efficiency improvement, calcium/strontium/barium sulfate, etc., can solve the problems of slow phase separation, high equipment requirements, large investment in electrolysis, etc., and achieve mild reaction conditions. , the effect of high metal recovery rate and short process flow
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Embodiment 1
[0052] Weigh 500g of manganese-rich slag formed by cobalt hydrometallurgical P204 impurity removal solution, add 1L of water to it, stir and slurry, add 130mL of 98% concentrated sulfuric acid and 24g of sodium sulfite, react until there is no black precipitate in the solution, and the end point pH=1.8 . Calcium in the manganese-rich slag dissolves and combines with sulfate radicals to form calcium sulfate precipitates, and insoluble high-valent manganese compounds are reduced to soluble divalent manganese ions by sodium sulfite. Calcium sulfate residue and 1.64 L of calcium-removed liquid were obtained after filtration. The weight of calcium sulfate slag after drying is 29.3g, and the composition is: Ca 24.52%; Cu 0.005%; Mn 0.10%; Co 0.0079%; Zn 0.0025%. The liquid composition after decalcification is: Ca0.76g / L; Cu 5.57g / L; Mn 59.12g / L; Co 6.26g / L; Zn 3.13g / L.
[0053] Lix984 was used to extract and remove copper from the decalcified solution. The volume fraction of Lix98...
Embodiment 2
[0058] Measure 2L of cobalt hydrometallurgy P204 impurity removal solution, its composition is copper 5.21g / L, manganese 49.34g / L, zinc 3.03g / L, calcium 7.53g / L, cobalt 7.62g / L, Al 0.66g / L L; Mg 0.019g / L. Add 242 g of sodium sulfate crystals to the impurity removal liquid, react for 2 hours, and then filter to obtain calcium sulfate slag and calcium-removed liquid. The weight of calcium sulfate slag after drying is 67.4g, and the composition is: Ca 23.2%; Cu 0.006%; Mn 0.11%; Co 0.0064%; Zn 0.0031%. The liquid composition after decalcification is: Ca 0.73g / L; Cu 5.11g / L; Mn 49.01g / L; Co 7.55g / L; Zn 2.98g / L.
[0059] Heat the decalcified liquid to 80°C, add a sodium carbonate solution with a concentration of 200g / L to adjust the pH to 4.9, filter to obtain copper carbonate precipitate and filtrate, add 2g of manganese powder to the filtrate, react for 2 hours, and then filter to obtain copper powder And after copper removal. The composition of the solution after copper remov...
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