微纳米气泡对典型细粒氧化矿物浮选的影响及机理  

Effects and Mechanism of Micro-nano Bubbles on Typical Fine Oxidized Minerals Flotation

作　　者：曾维能 任浏祎[1,2] 魏鹏刚 张喆怡 ZENG Weineng;REN Liuyi;WEI Penggang;ZHANG Zheyi(School of Resources and Environment Engineering,Wuhan University of Technology,Wuhan 430070,China;Hubei Key Laboratory of Mineral Resources Processing and Environment,Wuhan 430070,China)

机构地区：[1]武汉理工大学资源与环境工程学院,湖北武汉430070 [2]矿物资源加工与环境湖北省重点实验室,湖北武汉430070

出　　处：《金属矿山》2020年第10期156-160,共5页Metal Mine

基　　金：国家自然科学基金项目(编号:51504175);湖北省自然科学基金项目(编号:2019CFB533)。

摘　　要：细粒浮选是一直以来困扰选矿工作者的一大难题,其研究热度与日俱增。针对典型的细粒氧化矿单矿物锡石、黑钨、白钨、石英,采用微纳米气泡浮选法,拟通过引入微纳米气泡及控制固气界面性质强化细粒矿物的浮选效果,找出气泡性质与细粒矿物浮选行为间的联系,并探讨其机理。结果表明,经微纳米气泡溶液预处理的细粒矿物浮选回收率提高明显,四种矿物的回收率均有不同程度的提高(5~15个百分点);同时,相比传统浮选,适当降低微纳米气泡浮选的捕收剂浓度也能获得相近甚至更好的回收效果。沉降试验表明微纳米气泡可使细粒矿物发生团聚,体积增大,导致颗粒与气泡的碰撞概率提高。接触角及诱导时间测试结果表明微纳米气泡可增大矿物表面的润湿性,经微纳米气泡溶液处理后的矿物表面接触角明显增大,且气泡与矿物的黏附成功概率也更高。这一结果对通过控制微纳米气泡行为、强化细粒矿物浮选效果、降低药剂用量具有重要意义。Fine particle flotation has always been a big problem that has puzzled everyone,and its research interest is increasing day by day. The micro-nano bubble flotation method is adopted for typical fine-grained oxide ore single mineral cassiterite,black tungsten,scheelite,and quartz. It is planned to enhance the flotation effect of fine-grained minerals by introducing micro-nano bubbles and controlling the properties of the solid-gas interface. Then find out the relationship between the bubble properties and the flotation behavior of fine minerals,and explore its mechanism.The results show that the flotation recovery rate of fine-grained minerals pretreated with micro-nano bubbles has increased significantly,and the recovery rates of the four minerals have all increased by 5 to 15 percentage points;At the same time,the appropriate reduction in the amount of collector has little effect on the recovery rate,and a similar or even better recovery effect can be obtained in the case of a lower amount of agent. The sedimentation test shows that micro-nano bubbles can cause fine-grained minerals to flocculate and increase in volume,resulting in an increased probability of collision between particles and bubbles. Contact angle test and induction time test show that micro-nano bubbles can change the wettability of mineral surface. After processing minerals with micro-nano bubbles,the contact angle increases significantly,and the probability of adsorption of bubbles and minerals is also higher. This result has important practical significance for enhancing the flotation effect of fine-grained minerals by controlling the micro-nano bubble behavior while reducing the dosage of reagents and saving costs.

关 键 词：细粒浮选 氧化矿物 微纳米气泡 颗粒团聚 

分 类 号：TD923[矿业工程—选矿]