Abstract: A flotation process of collophanite need to go through two roughing, two cleaning and one scavenging. In the production practice thereexists problems that the bubble is more, tailing grade is higher, yield and recovery rate are lower. In order to achieve a better ore dressing index, the study analyzed the size and degree of dissociation of the ore and the concentrate after two t roughing and one scavenging. According to the principle, scavenging should be returned to the process point which has a similar size and degree of dissociation. At the same time, the study conducted an experimental analysis of the scavenging concentrate, exploration of scavenging concentrate in the case of only prolong flotation can achieve the best concentrate index. Combined with the original process and production practices, the best return flow of the scavenging concentrate was determined. After analysis, scavenging concentrate recovery process from first select to the second roughing was decided. After the technological transformation, production technology index has improved. In the case of little difference of ore grade, tailings grade was decreased 3.55 percentage, the yield of concentrate was increased 1.7 percentage, the recovery rate was increased 4.96 percentage.