本文根据生产现状和存在问题以及近几年的研究结果,提出当前或较长时期,处理次精矿的较为合理的工艺流程。一、次精矿的性质次精矿是一中间产品,含锡高于中矿。云锡处理的砂锡矿,主要为残坡积砂矿,其中包括部分过去土法洗选的尾矿,属难选矿石。处理这类矿石,均采用多段磨选的重选 According to the production status quo and existing problems as well as the research results in recent years, this paper puts forward the more reasonable technological process of treating secondary concentrate at current or longer period. First, the nature of secondary concentrate Secondary concentrate is an intermediate product, containing tin higher than the mine. The tin-tin-treated tin-tin mine is mainly the residual-slope quarry ore, including some of the tailings washed by indigenous soils in the past, which are refractory ore. Deal with this type of ore, are selected by the election of multi-election grinding