Abstract: Diesel or kerosene or other waste refinery oil is generally used in fine coal flotation process. In most cases, the problems with the use of such collectors are high consumption of collector and low yield of concentrate. In order to obtain a higher yield of flotation concentrate and eliminate safety hazards and hidden peril to environment, test is made with Limin Plant's flotation feed as object to compare the effects of flotation that can be obtained with the use of the new-type collectors BK610 and BK612 and the traditionally used collector through bench-scale flotation experiment, flotation rate test and timed-release analysis. Test result shows that for the flotation feed of Limin Plant, the use of BK610 can offer a much better selectivity effect; and at a small dosage of BK610, the yield of flotation concentrate can be increased by 5 percentage points.