Polyacrylamide is widely used in recent years, not only in sewage treatment, petrochemical, paper, coal washing, construction industry and also many other aspects as mining reagent, such as phosphate, iron ore of the flotation and tailings water treatment, coal washing coal flocculation and water treatment. That's way it has a reputation said as over one hundred industry additives. Under normal circumstances, gold ore dressing can be divided into two kinds of gravity dressing and flotation. And usually with flotation most! If the gold ore embedded cloth relatively thick, the use of gravity dressing recovery indicators is good. Recycling of gold mining equipment is mainly shaker and centrifugal concentrator. While occurred in quartz or pyrite in the fine-grained gold, the use of flotation method, the recovery index is better. In this application the mineral need to be grinded to 80 -200 mesh, together with xanthate, black medicine for the commonly used collector, and pine oil for th...