一、前言广东冲积砂锡矿的开采,至今已有13年的历史。但在选矿方法上一直沿用旧有的木溜槽进行选别。近年来,虽然增设了螺旋选矿机、摇床等设备,然而回收率并没有显著提高,资源损失大,生产成本高。这 I. Introduction The mining of alluvial tin in Guangdong has a history of 13 years. However, in the dressing method has been used to select the old wooden chute. In recent years, although the addition of spiral concentrator, shaker and other equipment, however, the recovery rate did not significantly improve, resource loss, high production costs. This