(一)绪言用跳汰机处理砂矿,已经很多年。这大半是由于用跳汰机粗选时,可以处理宽粒级,并且单位占地面积的处理量相当大。当前日趋需要处理贫矿的情况下,锡石的平均粒度日趋微细。于是,常常要求跳汰机处理一般认为适于用某些流膜选矿机处理的那样细的粒度范围。正规的操作是:除去大块,继后在跳汰机中粗选。所得到的精矿再经一次或二次跳汰精选,然后由采砂船或矿区选矿厂转运到锡厂进 (A) Introduction Jig processing machine with sand, for many years. Most of this is due to the wide range of particle sizes that can be handled with a jigger, and the unit footprint is quite large. With the current trend toward the need to deal with lean ore, the average size of cassiterite is becoming increasingly finer. As a result, jiggers are often required to handle that fine range of particle sizes that are generally considered suitable for processing with certain flow membrane concentrators. Formal operations are: remove the chunks, followed by rough selection in the jig. The concentrate obtained by once or twice jig selection, and then by the sand mining or ore dressing plant transported to the tin factory