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以锡、铅及砷含量较高的分银渣为原料,研究了高效回收锡、铅、砷、锑等有价金属的工艺流程。采用分银渣制团-高温脱砷锑-还原熔炼-硅氟酸电解工艺,考察了还原剂种类、还原剂加入量以及MeS加入量对高温脱砷锑过程的影响,结果表明:当还原剂R1加入量为8.8%,MeS加入量为2.4%时,高温处理团矿后锡回收率达到87.64%,脱砷锑效果好。经硅氟酸电解,锡、铅以铅锡焊料形式回收,锑以锑氧形式脱除,银、铋等富集进入阳极泥。
Taking tin, lead and arsenic as raw materials, the technological process of efficiently recovering valuable metals such as tin, lead, arsenic and antimony was studied. The effects of the type of reducing agent, the amount of reducing agent added and the amount of MeS added on the antimony-arsenic removal process at high temperature were investigated using the process of sub-silver slag-high temperature arsenic removal-antimony reduction-smelting-silicofluoric acid electrolysis process. When the content of R1 is 8.8% and the content of MeS is 2.4%, the recovery rate of tin after the high-temperature treatment reaches 87.64% and the effect of removing arsenic and antimony is good. After hydrofluoric acid electrolysis, tin and lead are recovered as lead-tin solder, antimony is removed as antimony oxygen, and silver and bismuth are enriched into anode slime.