纳米气泡浮选细粒煤的效果及机理  

Effect and Mechanism of Nanobubbles Flotation for Fine Coal

作　　者：郭思瑶 董红卫 赵通林 张明泽 马芳源 GUO Siyao;DONG Hongwei;ZHAO Tonglin;ZHANG Mingze;MA Fangyuan(School of Mining Engineering,University of Science&Technology,Anshan 114051,Liaoning,China;Anshan city urban development center,Anshan 114051,Liaoning,China)

机构地区：[1]辽宁科技大学矿业工程学院,辽宁鞍山114051 [2]鞍山市城市发展中心,辽宁鞍山114051

出　　处：《矿产综合利用》2024年第1期194-198,共5页Multipurpose Utilization of Mineral Resources

基　　金：辽宁省高等学校创新团队支持计划(LT2018010)。

摘　　要：这是一篇矿物加工工程领域的论文。本研究通过改变浮选捕收剂的用量、起泡剂的用量、给矿速度和充气量等可控因素,针对细粒煤在有纳米气泡和常规气泡条件下进行了浮选柱对比实验研究。在此基础上,阐述了纳米气泡对细粒煤的回收机理。实验结果表明:纳米气泡能够有效提高超细煤颗粒的回收率,保持产品灰分相同的情况下可节省约1/2药剂的用量。此外,较低的充气量条件下,浮选体系中引入纳米气泡依然能够获得较好的分选指标。纳米气泡能够优先吸附在疏水颗粒表面使得细颗粒煤团聚成较大的颗粒,增强了气泡与煤颗粒的碰撞概率从而达到强化浮选的效果。This is is an article in the field of mineral processing engineering.In this study,the controllable factors such as the amount of collector used in the flotation,the amount of foaming agent,the ore feeding rate and the aeration amount were changed,we conducted a column flotation comparative test study on fine coal with or without nanobubbles.On this basis,the recovery mechanism of nano-bubble to fine coal was expounded.The test results show that nano-bubbles can improve the recovery rate of ultra-fine coal particles,save about 1/2 of the dosage of the agent under the same ash content,and play the role of the second collector.In addition,the use of nanobubble flotation can still obtain a better sorting index under the condition of lower airflow velocity.Nanobubbles can be preferentially adsorbed on the surface of hydrophobic particles to make fine-grained coal agglomerate into larger particles,enhancing the collision probability of conventional bubbles and coal particles to achieve the effect of enhanced flotation.

关 键 词：矿物加工工程 纳米气泡 浮选 煤 浮选柱 机理 

分 类 号：TD952[矿业工程—选矿]