Study on the Enrichment and Extraction Process of Germanium from Germanium-Containing Dust AITranslate

210月Dynacor销售额1470万美元[J].中国贵金属,2022(12):49-49.

6外部干扰因素仍在,2022年三季度铅精矿产量延续下降[J].中国铅锌,2022(12):7-8.

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Chinese Library Classification Number:TF843[冶金工程—有色金属冶金]

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In recent years,the declining grade of the mined germanium-containing ores has led to a decrease in the grade of germanium-containing dust,resulting in increased consumption of reagents and environmental pressure in the process of germanium extraction by chlorination distillation.Taking the germanium-containing dust produced by a factory in Lincang,Yunnan,as the research object,germanium from it was enriched through processes of reduction volatilization,cyclic leaching,and neutralizing precipitation.X-ray diffractometer and atomic absorption spectrometer were used to analyze the phase composition and element content of raw materials and products,and the influence of various factors on the germanium enrichment rate during the enrichment process was also investigated.The results show that the optimal process para-meters for industrial production include a roasting temperature of 1100℃,a reductant dosage of 12.5%,a reagent concentration of 20%,a water bath temperature of 80℃,a liquid pH of 3,and a precipitation do-sage of 20 times.Under such optimized conditions,the germanium grade increases from 0.97%to 28.56%after reduction volatilization,cyclic leaching,and neutralization precipitation of the germanium-containing dust,with an enrichment factor reaching 29.4 times and a germanium recovery rate of 96.49%.The extraction of germanium from germanium-containing dust using this process is feasible and offers advantages of high germanium recovery rate,low environmental pollution,short process duration,and low cost.