中南大学学报（自然科学版）2017，Vol.48Issue(1)：9-15,7.DOI:10.11817/j.issn.1672-7207.2017.01.002
纳米气泡的形成及其对微细粒矿物浮选的影响
Formation of nano-bubbles and their influences on ultrafine mineral flotation
摘要
Abstract
The enhancing effect of nano-bubbles in ultrafine scheelite flotation was studied using a homemade nano-bubble generator based on the hydrodynamic cavitation.The effects of storage time,NaOl concentration,pH value and cavitation time on nano-bubble size distribution and Zeta potential were studied through a Zetasizer nano ZS(Malvern Nano ZS 90).The results show that nano-bubbles can be stable in NaOl solution for more than 1 h.The average size ofnano-bubble decreases with the increase of NaOl solution concentration,and increases as the pH values of solution raise.The electronegativity of nano-bubble is enhanced when pH values of solution increase.By contrast,increasing the cavitation time has no significant impact on the size of nano-bubbles beyond a certain time,probably because the dissolved gas reaches a dynamic equilibrium in liquid and gas phases in solution.Nano-bubbles in flotation can increase the flotation rate and recovery.关键词
纳米气泡/水力空化/白钨矿/浮选Key words
nano-bubbles/hydrodynamic cavitation/scheelite/flotation分类
矿业与冶金引用本文复制引用
冯其明,周伟光,石晴..纳米气泡的形成及其对微细粒矿物浮选的影响[J].中南大学学报（自然科学版）,2017,48(1):9-15,7.基金项目
国家重点基础研究发展计划(973计划)项目(2014CB643402) （973计划）
国家自然科学基金资助项目(51504289)(Project(2014CB643402) supported by the National Basic Research Development Program (973 Program) of China （51504289）
Project(51504289) supported by the National Natural Science Foundation of China) （51504289）
