Beneficiation method suitable for alterated rock type gold ores

The invention discloses a beneficiation method suitable for alterated rock type gold ores, and belongs to the technical field of gold ore beneficiation. The problems that a traditional beneficiation method for the alterated rock type gold ores is serious in pollution, high in energy consumption and low in gold-bearing ore recovery rate are solved. The method comprises the four steps of ore grinding, centrifugal reselection, flotation and tailing reselection. According to the beneficiation method, the reselection process of combining centrifugal reselection, a flotation process, a spiral chuteand a table concentrator, namely, the technological process of combining reselection, flotation and reselection is adopted, and after the gold-bearing ores with the grade of 1.5-5 g/t are subjected tobeneficiation process enrichment and separation, finally the gold-bearing grade in final gangue is about 0.10 g/t, and the recovery rate of the gold-bearing ores reaches 97%; and the method is extremely efficient, and the ben