Abstract: In view of the problem that the copper grade of molybdenum concentrate tailings is 3.42%, the copper recovery rate of traditional sedimentation tank process is only 60%~70%, and the loss of fine metal is serious, the research on resource recovery process is carried out. The laboratory test results show that butyl xanthate is the best collector, the flotation pulp concentration is 30%, the flotation process of one roughing, one cleaning and three scavenging is adopted, and no adjustment agent is added in the whole pro⁃ cess. Based on the static sedimentation test data, the ϕ6 m non-drive sedimentation tank was independent⁃ ly designed and applied, and the intermittent operation mode of feeding 2 d and flotation 1 d was matched. The low concentration pulp was efficiently concentrated to 30%. After industrial application, the compre⁃ hensive recovery rate of copper increased to 95.56%, the grade of copper concentrate reached 18.66%, and the grade of copper in tailings decreased to 0.18%. The process reagent system is streamlined, the equip⁃ ment has no transmission parts, and the investment in technical transformation is low, which provides a technical reference for the recovery of associated copper resources in small and medium-sized molybdenum mines under narrow site conditions.

Key words: molybdenum concentrate tailings, copper flotation, non-drive sedimentation tank, natu? ral sedimentation