Abstract:In a lead-zinc mine in Inner Mongolia, the oxidation rates of lead and zinc are relatively high. The concentrator adopts the lead sulfide-zinc sulfide-lead oxide-zinc oxide sequential flotation process, and the recovery of zinc oxide resources has problems such as high beneficiation cost and poor recovery index. In order to better recover the zinc oxide resources, the on-site lead oxide flotation tailings slurry was used as the research object, and its zinc grade was 3.70%. Three process exploration tests were carried out, namely sulfidation-amine flotation, desliming-sulfidation flotation and shaking table gravity separation. Although desliming-sulfidation flotation takes away some zinc in the fine mud, the flotation slurry conditions are greatly improved after the fine mud is removed. Finally, the desliming-sulfidation flotation process was determined as the principle process for the recovery of zinc oxide. The effects of stirring power and stirring time on desliming were investigated, and the effects of the types and dosages of adjusting agents and collectors on mineral processing indicators were studied. The results show that the desliming effect is better when the desliming-sulfurization flotation process is used with a stirring power of 1000 W and a stirring time of 4 min; the new reagents GH-7 and GY-101 can effectively improve zinc mineral processing indicators, reduce reagent dosage, and reduce mineral processing costs compared with conventional reagents; When the dosage of GH-7 is 2000 g/t, the dosage of sodium sulfide is 20000 g/t, and the dosage of GY-101 is 300 g/t, the zinc oxide flotation closed-circuit test indicators of zinc grade 27.29% and zinc recovery rate 77.13% can be obtained. Compared with the laboratory closed-circuit test indicators using on-site production processes and reagent systems, the zinc grade is increased by about 2 percentage points and the zinc recovery rate is increased by about 10 percentage points. The process flow and reagent system determined by the experiment have good guiding significance for the on-site zinc oxide production and increase the economic benefits for the enterprise.