The homework in dressing sorting one of the products, the products in this work, the useful ingredient is minimum. In the current technical and economic conditions,it can not be further sorting of ore,its called eventually tailings. Tailings is treasures to be releasing. Experts think, the current task for our country mining industry recycling economy is to develop a large number of tailings of long-term aside. Such as south guangxi Dan of tin polymetallic has 61 tailings, in total 25.22 million tons of tailings, contains a lot of non-ferrous metal tin, antimony, lead, zinc, silver, gold, indium, cadmium and nonmetallic arsenic, sulfur and so on, all of the national industrial grade in grade index on, some up to large or large, scale preliminary estimates there are 3 billion yuan of resources. If with the new development of the processing technology, these metal will recycling, no more than to build a new mines.