中国矿山工程

Experimental study is investigated in the rare-earth minerals in Sichuan, in view of the low recovery. And the “Bulk Flotation-High intensity magnetic separation” process was process was adopted. The flotation results indicated that, under conditions of the pulp concentration of 30%, NaOH dosage of 300g/t, silicate sodium dosage of 400g/t, H205+LD dosage of 300+300g/t, frother dosage of 50g/t, the rare earth concentrate was obtained by using of one roughing, four cleaning, two scavenging, and middles back to the flowsheet in turn. The rare earth flotation mixed concentrate was obtained with REO grade and operating recovery of 13.82% and 84.19%, respectively. The high intensity magnetic separation was used to removing barite and fluorite from the rare earth flotation mixed concentrate. The final concentrate REO grade, operating recovery and total recovery was 46.63%,89.22% and 75.11% respectively.