从高铜低碲溶液综合回收碲铜工艺研究

Study on tellurium and copper recovery process from the high-Cu and low-Te solution

以某公司铜阳极泥综合回收流程产出的高铜低碲溶液和沉碲后液为原料,采用铁粉将沉碲后液中的铜离子置换成铜粉,产出含铜粉的沉铜渣可用于高铜低碲溶液沉碲,实现碲、铜的有效分离回收,碲以碲化铜形式回收,碲回收率达99%以上。铜一部分在系统内用于沉碲,替代了原工艺沉碲所需的铜粉,达到铜在系统内循环利用的目的,减少了购买铜粉的费用,一部分以铜渣形式回收,铜回收率达99%以上。

The high-Cu and low-Te solution and the solution after Te-precipitation generated from copper anode slime recovery process by some company are used as the raw material. The Cu ion in the solution after Te precipita- tion is displaced by iron powder into copper powder. The yielded Cu-powder-bearing residue can be used for Te precipitation of the high-Cu and low-Te solution to realize effective separation and recovery of Te and Cu. Te is re- covered in the form of copper telluride with Te recovery over 99%. A part of copper is consumed in Te precipitati- on, which replaces the copper powder used to be required by the conventional process. Thus, copper is recycling in the system, which also reduces the cost of copper powder. Another part of copper is recovered in the form of copper residue, with Cu recovery over 99%.