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个旧锡矿石晶粒微细，锡铁致密结合，日趋难选。采用三段磨选、泥矿单独处理的单一重选工艺，已经不能适应资源和市场的变化。为了不断提高技术经济指标，云锡公司首先在卡房采选厂完成系统的技术改造：①以离心选矿机为特征的泥选技术改造加强细泥回收；②产富中矿送烟化炉处理以回收富连生体；③降低矿加选别系统精矿品位一精选，使单体锡石充分回收、锡铁分离。精选系统采用重选－磁选－浮选联合工艺，使全厂回收率提高９．７５％～１４．４９％，遏制了回收率的大滑坡：停开了三段、复洗二段磨选系统４＇×８＇磨机２台，摇床１６张。简化流程，降低消耗。年经济效益２１４万元。再次证明此举是目前大幅度提高效益的良策。
Gejiu tin ore fine grain, dense tin-iron combination, increasingly difficult choice. The use of three mill election, single processing of mud re-election process has been unable to adapt to changes in resources and markets. In order to constantly improve the technical and economic indicators, Yunxi Company first completed the technical transformation of the system at the card-picking plant: ① The technology of mud selection featuring centrifugal concentrator was enhanced to enhance the recovery of fine mud; ② The production of rich ore was delivered to the fuming furnace In order to recover the rich life; ③ reduce the quality of the ore concentrate plus a selection system, the full recovery of cassiter monomer, tin-iron separation. Selection system using re-election - magnetic separation - flotation joint process, the entire plant recovery increased by 9.75% ~ 14.49%, to curb the recovery of the large landslide: stop the three sections, Election system 4 ’× 8’ Mill 2, shaker 16. Simplify the process and reduce consumption. Annual economic benefit of 2140000 yuan. Once again prove that this move is a good way to significantly improve efficiency.