Abstract: In order to reduce the mass fraction of unburned carbon which restricts the further processing and utilization of gasified fine slag，on the basis of current situation and research progress on the flotation process for gasified fine slag and its characteristics such as residual carbon，mineral composition and apparent morphology，the froth flotation process was adopted in the unburned carbon removal experiment taking Yulin gasified fine slag.The experimental results showed that the yield of final concentrate was 11.06% ，with 30 kg/t diesel oil as collector agent and and l10 kg/t sec-octanol as foaming agent and taking "one rough flotation and two cleanings"concentrate separation process . This flotation process is difficult. Considering the properties of gasified slag，it can be preliminarily judged that the high porosity and large specific surface of gasified slag can lead to high consumption of flotation agent and poor flotation index.

Key words: gasified fine slag, unburned carbon content, apparent morphology, flotation, decarburization, foam floatation