Experimental research on effect of taper angle of XJM-S flotation machine impeller on agitation power

To understand the effect of taper angle of XJM- S flotation machine impeller on agitation power,based on scale- up principle and proven parameters,small XJM- S 0. 5 type flotation machine model and impellers ＆ stators with different five groups of taper angles are developed,what’s more,power of each group impeller ＆ stator is measured under the condition of different submersion depth and rotating speed. The results show that: within the limits of 90°-130°,the biggest agitation power of impeller is obtained at 130° taper angle,and the agitation power of impeller at 90° taper angle comes second; the minimum agitation power at 100° taper angle is close to that at 110°,120° taper angle; the bigger taper angle,agitation power will tend towards rising with the submersion depth increasing,moreover,obvious tendency happens in higher rotating speed; as for agitation power value,measured value is higher at slow rotating speed area and smaller at high rotating speed than theoretical value received by scale- up principle; power factor becomes small gradually step by step with rotating speed of impeller increasing.