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Beneficiation plant sources waste water, waste gas, waste, waste water pollutants which is particularly prominent. Pharmaceutical processing, accumulation of toxic substances such as mercury, chromium, cadmium and Other heavy metals, so that the total mass of the environmental situation tends to deteriorate. For example, cyanide effluent wastewater will become the main source of pollution of the water body; the emission of waste gas poses a direct hazard to the population and the biota; the dumping of the waste slag causes the deterioration of the ecological environment.