China is a mineral rich in natural resources, the full range of countries. Tailings solid waste emissions in the concentrator in the specific economic and technical conditions, the finely ground ore select useful components, mineral development and in particular metal mine development an important source of environmental pollution caused. At the same time, constrained by the level of mineral processing technology, production equipment, mineral development and the common way to cause loss of resources, so tailings with the double character of the secondary resources and environmental pollution. Tailings recycling machines is specialized recycling the tailings equipment.
Most contain a variety of colored, black, precious, rare earth and non-metallic minerals in the tailings, is a valuable secondary mineral resources, pending further development of recycling. For example, from copper tailings may elect a variety of useful components of copper, gold, silver, iron, sulfur, fluorite, wollastonite, barytes, etc.; recovery of lead, zinc, antimony, tin tailings, silver and other metals. Only to the recovery of fine iron ore from the iron ore tailings, iron ore tailings grade average of 11%, up to 27% iron concentrate grade of 61% recycling, the yield of 2% to 3% a year (300 ~ 400) × 104 t iron ore concentrate from the iron ore tailings can yield equivalent to the investment of billions of dollars to build a large-scale joint ventures. Tailings can bring economic benefits, but also can cause a greater negative impact on the environment, mainly reflected in the mine tailings will be a direct result of environmental pollution: ore directly carry excessive pollutants, such as the radioactive elements and other harmful components ; chemicals used in the beneficiation process, remaining in the tailings and some components of which react to produce new sources of pollution; tailings oxidation, hydrolysis and weathering changes in the surface stacking conditions, so that the original non-polluting components into the components of pollution, such as some heavy non-ferrous metal mining widespread sulfide; Fourth, surface water flows through the tailings dumps sites, through interaction with the tailings, dissolved some of the harmful components carry the transfer, resulting in large-scale pollution; five particles due to metal mine tailings fine, tailings discharged from dry dust carried by the wind easily cause pollution;, some mine tailings directly excretion in lakes, rivers, polluted water bodies and blocks river, caused by major disasters. Recycling tailings of tailings recycling machines, recycling tailings management to strengthen the mine will bring more benefits.
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