Abstract:Rare earth is China"s strategic resource and occupies a very important position in the national economy. Electrolysis process is the main process of producing rare earth metals and its alloys. Waste graphite is the waste from rare earth electrolysis, which produces about 50~100kg per ton of metal, and the annual loss of rare earth melting salt caused by rare earth electrolysis is about 6,650 tons. The rare earth content of waste graphite is about 5%, which has great recycling value. In this paper, the flotation process of rare earth waste graphite was investigated, and the influences of agent addition ratio, flotation time, liquid-solid ratio and stirring rate on graphite yield were discussed. The results showed that the graphite recovery rate reached 85% by adding the two-generation modified agent and keeping the liquid-solid ratio at 15:1, the ratio of agent addition at 9.5 ‰, the flotation time at 3.5h, and the stirring rate at 250rpm, and the satisfied flotation result was obtained.