Abstract: Taking the fine flake graphite with fixed carbon contents of 12.71% in Jiangxi Province as raw material， according to the chemical composition， XRD phase analysis， microscopic analysis and dissemination characteristics of the ores， the suitable flotation process was determined. And the feasibility of scrubbing instead of regrinding and the best position were analyzed. The optimal scrubbing conditions were determined as scrubbing speed of 2 000 r/min， scrubbing concentration of 20%， scrubbing time of 30 min by scrubbing condition test. On this basis， a series of whole process tests were carried out. The results showed that scrubbing can replace the regrinding in the process of multi-stage regrinding and multi stage flotation. The fixed carbon contents of final graphite concentrate obtained by scrubbing is 94.53%， which is higher than 93.16% of regrinding concentrate. It is proved that the function of regrinding is the same as that of scrubbing， which is to disperse and “clean”， not to grind. The chemical absorption test and concentrate SEM test further proved that scrubbing can “clean” the graphite surface.

Key words: dissemination characteristic, scrubbing, stage grinding and floating, adsorption determination, analysis of SEM