提高拉么锌矿选厂选铜指标的研究与实践

为解决拉么锌矿选厂生产的铜精矿含锌高和银回收率低等问题，选用PA作捕收剂，取消对银矿物有强抑制作用的石灰，精选时加强搅拌使PA从铁闪锌矿等矿物表面脱落，取得了较好的选铜试验指标。用新的选铜药剂制度对现场进行技改后，选铜成本减少，铜精矿含锌量从16.33%降到7.92%，铜的回收率提高6.01个百分点，每吨铜精矿的银含量比技改前增加1 007 g，选厂可年增经济效益1 000多万元。

Research and Practice of Improving Copper Beneficiation Indexes of Lame Zinc Concentrator

In order to solve the problems of high zinc content and low silver recovery of the copper concentrate produced in Lame Zinc Concentrator, PA was used as the collector, the lime which could strongly depress the silver minerals was eliminated and the agitation in cleaning was intensified to remove PA from surface of mineral such as marmatite, resulting in good beneficiation indexes. The application of a new reagent regime for copper separation in industrial production has led to a reduced copper concentration cost, with a zinc content reduction in copper concentrate from 16.33% to 7.92%, copper recovery increase by 6.01 percentage points and a silver content increase per ton copper concentrate by 1 007 g, which can bring an annual additional economic benefit of more than 10 M yuan to the concentrator.