旋流喷射浮选柱气含率影响因素研究

Study on the Factors Influencing the Gas Hold-up of Swirl Injection Flotation Column

浮选柱气含率大小是决定浮选效果的一个很重要的因素。研究了清水且不加起泡剂的条件下旋流喷射浮选柱中静压力大小、流体流量和充气量对气含率的影响以及挡板添加时气含率的变化情况。结果表明:气含率随着流体静压力、流体流量以及充气量的增加而增大,并且流体流量的影响最大,静压力的影响最小。在添加挡板的情况下,气含率随着挡板高度的增加以及离矿浆喷射端口距离的增加而增大,要得到合适的气含率,所加挡板的高度应高于柱体总高度的2/10,同时挡板离喷射端口的距离应控制在柱体长度的5/10和7/10之间。

The gas holdup of flotation column is a very decisive factor for the flotation result. Study is made on the effect of the fluid static pressure, flowrate and aeration rate of the swirl injection flotation column when using clear water without any frothing agent on the gas holdup and the change of gas holdup when baffles are added. The results indicate that the gas holdup increases with the increase in the fluid static pressure, flowrate and aeration rate, with the flowrate having the greatest influence and the static pressure the least. When baffles are added, the gas holdup increases with the increase in the baffle height and the distance between the baffles and the pulp injection port. For a proper gas holdup, the baffle height should be 2/10 of the total column height and the distance should be controlled at 5/10 to 7/10 of the column length.