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铜浮渣是粗铅火法精炼除铜过程的产物,针对铜浮渣现有工艺流程长,环境污染,工作环境差等缺点,本文采用“真空蒸馏-分级冷凝”的方法,对铜浮渣进行脱硫和脱铅以及回收铜银锑的应用研究,对金属及硫化物的饱和蒸气压进行了理论分析,考察了蒸馏温度,恒温时间对铅和硫的脱除率和铜银锑的直收率的影响。实验结果表明:在蒸馏温度1523 K、炉内压强20~160 Pa、保温4.5 h的条件下,一级冷凝物为含硫10%的硫化物,二级冷凝物为含铜1.17%的粗铅,残留物为含铅0.46%,含硫0.21%的铜银锑合金。
Copper scum is the product of the process of crude lead pyrometallurgy refining copper. In view of the shortcomings of the existing copper scum process such as long process flow, environmental pollution and poor working environment, this paper adopts the method of “vacuum distillation - fractional condensation” Desulfurization and lead removal, and the recovery of copper, silver and antimony. The saturated vapor pressures of metals and sulfides were theoretically analyzed. The effects of distillation temperature, constant temperature on the removal rates of lead and sulfur and copper-silver-antimony Effect of direct yield. The experimental results show that the first-stage condensate is sulfide containing 10% sulfur and the second-stage condensate is 1.17% crude lead with the distillation temperature of 1523 K, the pressure in the furnace of 20 to 160 Pa and the holding time of 4.5 h. , The residue is 0.46% lead, 0.21% sulfur copper silver antimony alloy.