Abstract: A new type of anionic reverse flotation CSC-68, and a new modifier CSR-36 developed by Changsha Research Institute of Mining and Metallurgy were adopted to make the inverse flotation tests on magnetic separation concentrate for Yuanjiacun iron ore, and then test results are compared with that of four reagents combination of the traditional NaOH + Starch + CaO + fatty acid anions collector. The results showed that by combining two new agents, the iron ore concentrate in reverse flotation with grade of 66.06% and recovery of 87.19% are obtained. The ratio of iron grade and recovery with the traditional four reagents combinations are higher by 0.96% and 0.87% respectively. New agents are not only superior in beneficiation index, but also can greatly simplify the agents system. Moreover, scaling problems in the pipeline caused by CaO can be avoided. 

Key words: New-type anionic collector CSC-68, New-type modifiers CSR-36, Yuanjiacun iron ore, Reverse flotation