Abstract: Anionic collector LSMFS containing hydroxyl, carboxyl and sulfate groups was synthesized mixed with a cheap fatty acid soap to be a new carbonate phosphate collector LG-01.A carbonate phosphate from Guizhou with P₂O₅ grade 25.31% was taken as the research object and reverse-flotation tests on the ore was carried out.And then the main component of combined collector LG-01 onto carbonate phosphate surface was respectively discussed by IR.Laboratory tests show that the combined collector LG-01 is a low toxicity and efficient collector which not only has wide variety of sources, low cost, but also is not sensitive to temperature.The high-quality phosphorus concentrate with P₂O₅ grade 34.79%, MgO 1.01% and recovery 90.64% was obtained through single flotation.

Key words: Combined collector LG-01, Carbonate phosphate, Reverse-flotation, Interactive mechanism