中南大学学报（自然科学版）2025，Vol.56Issue(7)：2647-2656,10.DOI:10.11817/j.issn.1672-7207.2025.07.003
铜电积富液超声破乳—微泡气浮—纤维吸附深度除油技术及机制
Deep oil removal technology and mechanism in copper electrowinning electrolyte using ultrasonic demulsification—microbubble flotation—fiber adsorption
摘要
Abstract
In copper hydrometallurgy,organic oil droplets are commonly entrained in the electrolyte after stripping.If these droplets are not efficiently removed,they can negatively affect the quality of the cathode copper.To enhance oil removal from the electrolyte in the Muliashi hydrometallurgical plant process and reduce the impact of the organic oil on cathode copper quality,an experimental study was conducted to evaluate the efficiency of oil removal using a combination of ultrasonic demulsification,microbubble flotation and adsorption filtration.The oil removal mechanism of ultrasonic demulsification—microbubble flotation method were studied.The results show that ultrasound can neutralize the negative charge on the surface of oil droplets through its cavitation effect,leading to a reduction in the overall charge of the droplets and a destabilization of the electrolyte system.The charge repulsion between the oil droplets is reduced.It results in the collision and coalescence of oil droplets,where fine oil droplets merge into floating droplets with larger particle size,and the difficulty of microbubble flotation is reduced.In the microbubble flotation process for oil removal,a smaller bubble diameter leads to stronger adsorption between the bubbles and oil droplets,facilitating faster spreading of the oil droplets on the bubble surface.Additionally,an increased number of bubbles and greater dispersion enhance the efficiency of microbubble flotation for oil removal.Under the optimal conditions of ultrasonic power of 300 W,ultrasonic time of 4 min,air input of 4 L/min,inlet flow of 0.8 m3/h,oil removal time of 5 min,and polyester fiber balls as the adsorption filter material,the oil removal rate from the electrowinning rich liquid is 89.77%,with the oil content reduces from 60-70 mg/L to less than 7 mg/L.关键词
电积富液/微泡气浮/超声破乳/吸附除油/阴极铜Key words
electrolyte/microbubble flotation/ultrasonic demulsification/adsorption oil removal/cathode copper分类
矿业与冶金引用本文复制引用
李阳,邓洁,刘亚平,傅钰辉,尹君,寇珏,孙春宝..铜电积富液超声破乳—微泡气浮—纤维吸附深度除油技术及机制[J].中南大学学报（自然科学版）,2025,56(7):2647-2656,10.基金项目
国家自然科学基金资助项目(51974016) （51974016）
国家重点研发计划项目(2022YFC2904502)(Project(51974016)supported by the National Natural Science Foundation of China （2022YFC2904502）
Project(2022YFC2904502)supported by the National Key Research and Development Program of China) （2022YFC2904502）
