Abstract: For the complex technological flowsheet for the recovery of the wolframite of Shizhuyuan polymetallic ore，the lower grade wolframite concentrates，the process of cyclonic-static micro-bubble flotation column is adopted on-site to make the semi-industiral column flotatin tests of wolframite ore. The test results showed that the wolframite concentrates containing WO3 of 44.39% and recovery rate of 86.82% are obtained through the closed-circuit of one stage roughing and two stage cleanings by using three cyclonic-static micro-bubble flotation columns. Compared with closed-circuit of one stage roughing five stage cleanings and three stage scavengings by using the flotation machines，the wolframite concentrates containing WO3 increased 11.45 percentage，and the recovery increased 3.52 percentage，meanwhile three roughings and three cleaings were cut. 

Key words: Shizhuyuan complex polymetallic ore, Wolframite flotation, Cyclonic-static micro-bubble flotation column, Semi-industrial test