Latest advances and progress in the microbubble flotation of fine minerals:Microbubble preparation,equipment,and applications  

作　　者：Ziyong Chang Sensen Niu Zhengchang Shen Laichang Zou Huajun Wang 

机构地区：[1]Civil and Resource Engineering School,University of Science and Technology Beijing,Beijing 100083,China [2]State Key Laboratory of Comprehensive Utilization of Low-Grade Refractory Gold Ores,Shanghang 364200,China [3]BGRIMM Technology Group,State Key Laboratory of Mineral Processing,Beijing 100160,China

出　　处：《International Journal of Minerals,Metallurgy and Materials》2023年第7期1244-1260,共17页矿物冶金与材料学报（英文版）

基　　金：funded by the National Natural Science Foundation of China (No.52004020);Fundamental Research Funds for the Central Universities (No.00007733);Open Foundation of State Key Laboratory of Mineral Processing (No.BGRIMM-KJSKL-2021-13);High-end Foreign Expert Introduction Program (No.G2022105001L);State Key Laboratory of Comprehensive Utilization of LowGrade Refractory Gold Ores,Zijin Mining Group Co.,Ltd.

摘　　要：In the past few decades,microbubble flotation has been widely studied in the separation and beneficiation of fine minerals.Compared with conventional flotation,microbubble flotation has obvious advantages,such as high grade and recovery and low consumption of flotation reagents.This work systematically reviews the latest advances and research progress in the flotation of fine mineral particles by microbubbles.In general,microbubbles have small bubble size,large specific surface area,high surface energy,and good selectivity and can also easily be attached to the surface of hydrophobic particles or large bubbles,greatly reducing the detaching probability of particles from bubbles.Microbubbles can be prepared by pressurized aeration and dissolved air,electrolysis,ultrasonic cavitation,photocatalysis,solvent exchange,temperature difference method(TDM),and Venturi tube and membrane method.Correspondingly,equipment for fine-particle flotation is categorized as microbubble release flotation machine,centrifugal flotation column,packed flotation column,and magnetic flotation machine.In practice,microbubble flotation has been widely studied in the beneficiation of ultrafine coals,metallic minerals,and nonmetallic minerals and exhibited superiority over conventional flotation machines.Mechanisms underpinning the promotion of fine-particle flotation by nanobubbles include the agglomeration of fine particles,high stability of nanobubbles in aqueous solutions,and enhancement of particle hydrophobicity and flotation dynamics.

关 键 词：microbubble preparation FLOTATION fine minerals flotation equipment bubble-particle interaction 

分 类 号：TD923[矿业工程—选矿]