摘要
为探究浮选机生产能力与搅拌功耗之间的关系,对XCF型浮选机进行CFD数值模拟,分析得出由于双重作用叶轮的一体化结构导致搅拌功耗随生产能力的增大将呈幂指数上升,为增进生产能力和降低搅拌功耗设计新型叶轮,通过分析流场特征参数评价双重作用叶轮与双环差速叶轮的优劣,得出以下结论:1)在增大叶轮内转速至600 r/min的情况下,双环差速叶轮的搅拌功耗相较于转速为420 r/min的双重作用叶轮低15%,且此数值随叶轮转速的增大而增大,符合设备节能降耗的发展理念;2)双环差速叶轮下的浮选槽流场比双重作用叶轮更稳定,浮选效果更好;3)双环差速叶轮可通过分别调整内外叶轮转速以满足浮选过程的多个参数要求,如矿浆颗粒的再起动速度、浮选时间、精矿品位等等。综上所述,双环差速叶轮更符合浮选设备大型化和节能降耗的工业需求。
To explore the relationship between the capacity of flotation machine and the power consumption by agitation,CFD simulation of XCF flotation machine was carried out.The analysis showed that the power consumption by agitation increased exponentially with the increase of capacity due to the integrated structure of dual-acting impeller.To improve production capacity and reduce stirring power consumption,a new impeller is designed.The advantages and disadvantages of double-acting impeller and double-ring differential impeller are evaluated by analyzing characteristic parameters of flow field,and the following conclusions are drawn:1)When the inner speed of the impeller is increased to 600 r/min,the stirring power consumption of the double-ring differential impeller is 15%lower than that of the doubleacting impeller with the speed of 420 r/min,and this value increases with the increase of the impeller speed,which is in line with the development concept of energy saving and consumption reduction of the equipment;2)The flow field of the flotation tank under the double-ring differential impeller is more stable than that of the double-acting impeller,and the flotation performance is better;3)Double-ring differential impeller can be adjusted to meet the requirements of multiple parameters in the flotation process,such as the restart speed of pulp particles,flotation time,concentrate grade and so on.To sum up,the double-ring differential impeller can well match with the industrial needs of large-scale flotation equipment and energy saving and consumption reduction.
作者
王志远
陈博桢
杜江宁
申凯傲
鄢曙光
WANG Zhiyuan;CHEN Bozhen;DU Jiangning;SHEN Kaiao;YAN Shuguang(School of Resources and Environmental Engineering,Wuhan University of Science and Technology,Wuhan 430081,China;School of Management,Wuhan University of Science and Technology,Wuhan 430081,China)
出处
《有色金属（选矿部分）》
CAS
北大核心
2023年第6期109-117,139,共10页
Nonferrous Metals（Mineral Processing Section）
基金
国家自然科学基金资助项目(52204282)。
关键词
XCF型浮选机
CFD数值模拟
双环差速叶轮
生产能力
搅拌功耗
XCF type flotation machine
CFD numerical simulation
double ring differential impeller
capacity
stirring power consumption
