Polymetallic ore beneficiation wastewater recycling method

The invention provides a polymetallic ore beneficiation wastewater recycling method. The polymetallic ore beneficiation wastewater recycling method is characterized by comprising two steps of physical treatment and biological treatment. According to the polymetallic ore beneficiation wastewater recycling method, the existing beneficiation wastewater output equipment and tailings ponds of aluminium and zinc beneficiation industries are used, wastewater treating agents such as calcium hydroxide, saponification slag and calcium carbide are added to wastewater in a mixing tank so as to ensure that suspended matters in the wastewater settle, the wastewater is purified so as to meet the technical requirements that obtained clear water is continuously used for beneficiation, the content of suspended matters in the treated water is less than 100mg/L, the pH value of the treated water is 8, and the cyclic utilization of the beneficiation wastewater is realized. The polymetallic ore beneficiation wastewater recycling method has the characteristics of low investment, low running cost, energy conservation, emission reduction and cyclic economy and is suitable for the cyclic utilization of the polymetallic ore beneficiation wastewater.