Abstract: For using the jet flotation machine effectually, study the effects of different aeration volumes and foaming agent parameters on flotation, using a self-made jet flotation model, The self-made spray flotation model was used to simulate the effect of flotation aeration and foaming agent concentration on concentrate yield. The results show: aeration volumes changes the shear strength of the fluid, in the case of the same pulp concentration and foaming agent concentration, The aeration amount has a critical value of 400L/h, which is less than the critical value. The flotation concentrate yield increases with the increase of the aeration amount, greater than the critical value, the effect is deteriorated; The blowing agent concentration also has a critical parameter of 0.1 mmoL-1. Therefore, controlling the amount of aeration and the concentration of the foaming agent during the operation of the jet flotation machine is an important way to adjust the concentrate yield.