The zinc and cassiterite grade is low in copper zinc cassiterite polymetallic ore of maincopper ore in Dulong Yunnan,whose comprehensive recovery is difficulty of copper zinc cassiterite mineral.The cassiterite recovery rate is low and the zinc content was unable for recycling of production cost high that benefits at a loss in production practice.Through slime removing to deal with copper tailings in turn under the current condition,meanwhile the zinc sulfide sorting process turns Zn-S preferential flotation into Zn-S mixed flotation and separation,getting with the grade of zinc 41.15％,the zinc concentrate recovery rate 38.32％ of production indicators in turn under the condition of production costs fell by 50％,implementing the low-grade zinc mineral recovery of the economy and efficience,optimizing the cassiterite process flotation.The grade of cassiterite was improved to 32.47％ from 41.14％,the comprehensive recovery of cassiterite was improved to 27.76％ from 38.05％,and the cassiterite indicators improved remarkably,implementing the low-grade zinc and cassiterite content comprehensive recovery form copper railings,improving the mineral resources comprehensive utilization and increasing the concentrator economic benefit.%云南都龙矿区以铜矿石为主的铜锌锡多金属矿石中锌锡品位偏低,铜锌锡矿物综合回收难度大,生产实践中锡石回收率偏低,锌矿物因生产成本高效益亏本未能回收.在现有条件下通过对选铜尾矿进行预先脱泥处理,同时锌硫选别工艺流程由“优先选锌-再脱硫”工艺调整为“锌硫混选-分离”工艺,在生产成本下降50％的条件下获得了含锌品位41.15％、锌精矿回收率38.32％的生产指标,实现了低品位锌矿物的经济高效回收;优化选锡工艺流程后,锡精矿品位由32.47％提高到41.14％,锡综合回收率由27.76％提高到38.05％,锡指标得到大幅度提高;选铜尾矿中低品位锌锡矿物的综合回收提高了矿产资源的利用率,增加了选矿厂的经济效益.
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