Abstract: Gold ore properties and gold distribution characteristics in some gold ore slime by washing the crushed in Shandong Province were introduced.The slime in which gold is significantly concentrated in micro-fine particles was processed with one stage scavenging and one stage cleaning semi-industrial test system with cyclonic-static micro-bubble flotation column，and stability of the system research was carried out，which obtained an average gold grade of 98.98 g/t，recovery of 88.15% of the gold concentrate，on the average gold grade of 2.21 g/t of slime. The result was obviously better than the index of floatation machine production，which showing cyclonic-static micro-bubble flotation column has significant advantages in fine particles and micro-fine particles separation.

Key words: Gold ore slime, Cyclonic-static micro-bubble flotation column, Semi-industrial test