某复杂铜锌硫铁型多金属矿铜锌分离实践与改造

仙人桥矿业有限公司选矿厂采用优先浮铜-锌硫混浮后锌硫分离-磁选收铁工艺处理铜锌硫铁型复杂多金属矿,近年来针对铜优先分选效率低、合格锌精矿生产困难、高碱度回水负影响选别作业等问题,采用选铜流程结构局部改造及优化选铜药剂制度,选锌作业降低碱耗及高pH值回水分用等措施进行选矿工艺技术改造。实践表明,改造后,铜锌矿物分离得以强化,产出锌含量低于6%的合格铜精矿,规避铜产品销售困境；锌硫分离作业稳定性增强,以BK526和石灰组合使用抑硫浮锌,分储分用调控锌硫分离作业段高pH回水使用,实现锌品位高于40%锌精矿连续产出,实现了多金属硫化矿物资源优势利用,为企业降本增效显著。

Practice and Improvement of Copper-Zinc Separation in Complex Copper, Zinc, Sulfur and Iron Polymetallic Ore

mill plant ore treatment plant of Xianrenqiao Mining Co., Ltd. manages the copper-zinc-sulfur-iron complex polymetallic ore using Cu-preferential flotation-Zn-S mixed flotation then separation-Fe magnetic separation process. The mill plant faced many problems, including low separation efficiency in Cu-recovery course, the production of an accepted Zn-concentration being difficulty, and the negative effect of high alkalinity backwater. Facing these challenges, the mill plant has finished tasks of the partial modification of the flowage structure of Cu-recovery operation as well as an optimization of reagent system, followed by reducing the lime use of the Zn-S separation, and the directional use of high pH backwater in recent years. Results of the reformation indicate that, the enhancement of Cu-Zn separation leads to output qualified Cu concentration which could be traded well when Zn-containing percentage lower than 6%, and the improvement in the stability of Zn-S separation course related to the coupled use of BK526 and lime, and the regulated use of high pH backwater steadily generates Zn-concentration with a zinc grade higher than 40%. The treatment of Cu-Zn-S-Fe-bearing polymetallic ore in the mill plant tends to be much more efficiency through reform.