A “flotation -reelection”joint process was used to study the fine -grained disseminated cassiterite,a mineral component complex cassiterite.Refractory ore research,ore properties were analysized ,the “flotation -reelection”and “mixed flotation -reelection technical and economic indicators”in two of the process were examined.The results showed that:in flotation -reelection process,tin comprehensive re-covery was of 40.43%,copper recovery was of 65.87%.Compared with the bulk flotation -reelection process,tin comprehensive recovery rate was 2.49% low,copper recovery was 4.2% higher;in flotation -reelection process of processing,a tonne of ore gross profit was 58.46 yuan,compared with flotation -re -e-lection process 13.93 yuan more revenue was obtained.%采用“浮选－重选”联合工艺对锡石细粒嵌布、矿物组分复杂的锡石多金属硫化矿进行研究。分析了矿石的性质，考查了“优先浮选－重选”和“混合浮选－重选”两种工艺流程的技术经济指标。结果表明：优先浮选－重选工艺流程中，锡的综合回收率为40．43％，铜的回收率为65．87％；与混合浮选－重选工艺流程相比，优先浮选－重选工艺的锡综合回收率低2．49％，铜回收率高4．2％；优先浮选－重选工艺流程的处理每吨原矿的毛利润为58．46元，比混合浮选－重选工艺流程多收入13．93元。
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