What should I pay attention to when buying tailings processing equipment?

After the raw ore enters the beneficiation plant and undergoes crushing, grinding and sorting operations, the useful minerals in the ore are sorted into one or more concentrate products. The tailings are then discharged in a slurry state. Concentrate yield is small, non-ferrous metal processing plant concentrate yield is generally only 10-20%; tailings are very large, the yield is generally 80% to 90%; or even larger. If a daily processing for 100t of small-scale mineral processing plant, the daily discharge of tailings up to 80-90t or more; high grade raw ore, concentrate production rate is large, the amount of tailings is small. A large number of tailings if not properly handled, very harmful. Tailings water discharged from the processing plant often contains a large number of chemicals and harmful substances. The source of the flotation chemicals added to the ore dressing process and the metal elements in the ore, common cyanide, yellow drug, black drug, pine oil, copper ions, lead ions, zinc ions, and in individual cases there may also be arsenic, phenol mercury and so on. When these harmful substances in tailings water do not meet the emission standards, they are harmful to human body, livestock, fish and farmland. Therefore, the tailings of mineral processing plant can not be discharged arbitrarily, otherwise it will cause the pollution of river system, nearby soil and even groundwater resources, which will bring a series of serious problems and affect the development of enterprises. On the other hand, the concept of tailings is relative, and tailings contain a large number of useful components. At the current level of technology, some precious and rare metals can not be recovered, but with the progress of science and technology, the useful components in the tailings can be re-developed and utilized. Tailings resources have been comprehensive utilization at home and abroad, there are many examples, such as Hubei Province, Tongluoshan mine processing plant tailings are rich in gold, silver, copper, iron and other useful ingredients, in recent years, with the development of beneficiation technology, in 1985, the mine used weak magnetic - strong magnetic separation technology on the tailings reelected each year from the tailings recovered tens of thousands of tons of iron ore concentrates, the value of the number of million yuan, is now being further tailings regrinding reelected, tailings in the gold, silver, copper, iron, copper and iron. Now the tailings are being further regrinded and re-elected, so that the gold, silver, copper, iron and other useful minerals in the tailings can be fully recycled and utilized, thus greatly improving the economic benefits of the mine.