砂锡尾矿开采利用的实践

Exploitation and utilization of alluvial tin tailing

为加强砂锡的尾矿综合利用，根据期六寨砂锡尾矿的开采技术条件，选用露天开采方法进行尾矿回采；对开采中暴露且容易坍塌难以形成台阶的坡面，采取开挖工作面晾晒一周交替回采；对采运设备陷入尾矿问题，采用垫块石或铺设聚乙烯板材措施。选用“旋流器分级预先抛尾、粗砂磁重选别、矿泥重选”流程进行尾矿选别。入选中因含泥高（占50％），颗粒太细（0．04mm），导致过早沉降难以形成适宜的矿浆浓度，而致沟、管堵塞问题，采取加兑20％～25％的砂锡原矿或脉锡氧化矿获得成功，最终产出合格产品一锡富中矿（锡品位4．85％～5．29％，回收率41．49％～42．19％）。

This article describes the current situation on the domestic comprehensive utilization about Mine railings. According to Qi Liuzai alluvial tin tailing mining technology, then choose the surface mining methods to stop tailing. Excavation of working face to drying one week to continue excavation to solve the problem of the exposured and easy to collapsed and difficult to form bench face in mining exploitation. Mat stone or laying polyethylene sheet to solve the problem of the mining and transport equipment into the tailing. Tailings sorting using the following procedure：Grade tailing by hydrocyclone,Grit by magnetic and gravity separation,Fango beneficiation by gravity. Due to the selected tailings contained too much mineral mud lead to premature settlement is difficult to form a suitable pulp density, blockaged tube and ditch. Get success by taking 20 to 25 percent into the sand tin oxide ore, tin ore or veins to be successful, the final output of qualified products - middling product tin.