mining machine 1.high processing capacity 2.high recovery rate 3.high enrichment ratio... Mining Machine spiral ... the granularity 0.3-0.02 millimeters fine grain like iron, tin, tungsten, tantalum-niobium, gold ore, coal mine, monazite, rutile, ... Feature & Benefits of spiral chuteReasonable structure and small occupation areaHigh recovery, high efficiency, and precise separation,Light in weight, rust ...