Abstract: In order to high effectively recover and utilize the coke existed in blast furnace dust (BFD)，combined process of flotation and magnetic separation was used to treat a BFD containing 4.43% Zn and 18.45% C.The results show that：①With kerosene dosage of 800 g/t，terpenic oil dosage of 200 g/t and sodium silicate dosage of 1 500 g/t，rough coke concentrate with 74.96% C，1.91% Zn，5.19% Fe and carbon recovery of 90.83% was obtained；②Treating magnetite as carrier，coke concentrate with carbon grade of 85.17% and total recovery of 86.29% can be obtained by grinding the flotation concentrate to 74.32% passing 0.074 mm，and then enduring high intensity magnetic separation with 1.5 T background induction intensity，further more the zinc grade in coke concentrate was reduced to 1.29%.The quality of coke concentrate can meet the requirements of matching ore in sintering.

Key words: Blast furnace dust, Coke concentrate, Zinc, Flotation, Magnetic separation