Flotation recovery of copper from molybdenum concentrate tailings
The molybdenum concentrate tailings of a mine contain 0.526％copper which mainly exists in the form of chalcopyrite and has comprehensive recycling value.Other minerals in the tailings are mainly quartz,chlorite,and pyrite.The particle size of the tailings is very fine,and the content of pyrite is high,therefore it is difficult to separate the copper and sulfur.The effects of flotation process parameters and reagent system on copper and recovery of copper concentrate were studied by single factor condition test system.The process parameters were further optimized,and open-circuit and closed-circuit flotation tests were carried out respectively.The results show that the optimum flotation process parameters and reagent dosage are as follows:pulp concentration 30％,water glass dosage 1 000 g/t,lime dosage 500 g/t,copper sulfate dosage 300 g/t,butyl xanthate 50 g/t,aeration volume 0.2 m3/h.A copper concentrate with a grade of 24.18％and copper recovery of 85.65％can be obtained by adopting the flotation process of one roughing,three cleaning,and three scavenging(one roughing,three cleaning,and three scavenging).The comprehensive flotation index is better,and the efficient recovery of valuable metal copper in molybdenum tailings can be realized.
万方数据
维普
