摘要
随着易选矿石资源的日渐枯竭,难选低品位微细粒矿物已成为当前资源开发利用的重点。由于微细粒矿物具有比表面积大、质量轻、表面能高等特点,在浮选中易产生药剂消耗大、矿粒非选择性聚团、矿浆黏度升高等问题。针对微细粒浮选的核心思路之一是增大矿物表观粒径或减小气泡尺寸,其中微纳米气泡技术作为减小气泡尺寸的关键手段,可通过强化气泡与矿粒间的相互作用,促进目的矿物上浮。以金红石、锡石、云母为典型案例,阐述微细粒矿物的分选难点,系统分析微纳米气泡对微细粒矿石的浮选强化作用;同时介绍微纳米气泡的产生方式及特性,为其高效制备与稳定性机理的深入研究提供参考;最后从强化捕收剂作用、提高碰撞概率与黏附性、促进气泡矿化三个维度,举例阐明微纳米气泡在典型微细粒矿物浮选中的作用机理,以期为该技术的研究与工程应用提供借鉴。
With the gradual depletion of easily processed ore resources,refractory low-grade micro-fine minerals have become the focus of current resource development and utilization.Due to the characteristics of large specific surface area,light weight and high surface energy of fine minerals,it is easy to produce problems such as large reagent consumption,non-selective agglomeration of mineral particles and high pulp viscosity in flotation.One of the core ideas for fine particle flotation is to increase the apparent particle size of minerals or reduce the bubble size,in which micro-nano bubble technology,as a key means to reduce the bubble size,can promote the flotation of target minerals by strengthening the interaction between bubbles and particles.In this paper,taking rutile,cassiterite and mica as typical cases,the separation difficulties of micro-fine minerals are described,and the flotation strengthening effect of micro-nano bubbles on micro-fine ores is systematically analyzed.At the same time,the generation mode and characteristics of micro-nano bubbles are introduced,which provides a reference for the further study of their efficient preparation and stability mechanism.Finally,the mechanism of micro-nano bubbles in the flotation of typical micro-fine minerals is illustrated from three dimensions of strengthening the role of collectors,improving the collision probability and adhesion,and promoting bubble mineralization,in order to provide a reference for the research and engineering application of this technology.
作者
任浏祎
肖丹丹
张新宇
黄艳芳
韩桂洪
包申旭
张一敏
REN Liuyi;XIAO Dandan;ZHANG Xinyu;HUANG Yanfang;HAN Guihong;BAO Shenxu;ZHANG Yimin(Zhongyuan Critical Metals Laboratory,Zhengzhou 450001,China;School of Resources and Environmental Engineering,Wuhan University of Technology,Wuhan 430070,China;Key Laboratory of Green Utilization of Critical Non-metallic Mineral Resources,Ministry of Education,Wuhan University of Technology,Wuhan 430070,China;Hubei Key Laboratory of Mineral Resources Processing and Environment,Wuhan 430070,China)
出处
《有色金属(选矿部分)》
2025年第9期67-84,共18页
Nonferrous Metals(Mineral Processing Section)
基金
国家自然科学基金资助项目(52274270,52474300,U22A20130)
中原关键金属实验室开放基金资助项目(GJJSKFZD202403)。
关键词
微纳米气泡
细粒浮选
浮选机理
锡石
金红石
云母
micro-nano bubbles
fine particle flotation
flotation mechanism
cassiterite
rutile
mica
