Enrichment of Germanium in Low Concentration Germanium Containing Leaching Solution by Reduction-Neutralization Precipitation-Low Acid Leaching Method
The method of reduction-neutralization precipitation-low acid leaching was used to efficiently enrich germanium from low concentration germanium leaching solution.The main influencing factors of reduction neutralization precipitation and low acid leaching on germanium separation and enrichment were studied.The results showed that under the conditions of zinc sulfide concentrate consumption of 2.0 g/L,zinc oxide dust consumption of 19 g/L,reaction temperature of 80 ℃,reduction time of 20 min,and neutralization time of 240 min,the germanium precipitation rate could reach 97.24%.Under the conditions of initial sulfuric acid concentration of 165 g/L,liquidsolid volume mass ratio of 4 mL/g,leaching temperature of 60 ℃,and leaching time of 60 min,the leaching rate of germanium could reach 98.78%.
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