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纳米气泡对金矿浮选效果影响的探索
- 作者：
- 吴中贤|周波|董鸿良|冉金城|陶东平
- 作者单位：
- 山东理工大学资源与环境工程学院&中国矿业大学化工学院|山东理工大学资源与环境工程学院|山东烟台鑫泰黄金矿业有限责任公司|山东理工大学资源与环境工程学院|山东理工大学资源与环境工程学院
基金项目：
- 国家自然科学基金项目（52204274）；山东省自然科学基金项目（ZR2021QE122）
详细信息：
- 作者简介：
- 吴中贤（1995—），男，博士研究生，研究方向为微细粒浮选；E-mail:wuzhongxian567@163.com
- 通讯作者：
- 陶东平（1963—），男，教授，从事矿物加工新工艺、新技术研究工作；E-mail：dptao@qq.com
- PDF下载
Exploration of the effects of nanobubbles on gold ore flotation
- English Author：
- School of Resources and Environmental Engineering,Shandong University of Technology&School of Chemical Engineering Technology,China University of Mining and Technology|School of Resources and Environmental Engineering,Shandong University of Technology|Shandong Yantai Xintai Gold Mining Co.,Ltd.|School of Resources and Environmental Engineering,Shandong University of Technology|School of Resources and Environmental Engineering,Shandong University of Technology
- Unit：
- 摘要
- 在线预览
- 参考文献
摘要:
针对某选矿厂细碎矿样进行了实验室纳米气泡浮选与常规浮选的比较试验，详细考察不同药剂用量对-0.074 mm占比92 %的微细粒金矿纳米气泡浮选效果的影响。结果表明：纳米气泡浮选可显著提高金精矿的Au品位和Au回收率，同时提高浮选速率。在一粗三精两扫的闭路浮选流程中，纳米气泡浮选可获得Au品位35.32 g/t、Au回收率93.11 %的精矿。相比常规浮选，纳米气泡的引入使精矿中Au品位增加了3 g/t，Au回收率提高了12.33百分点。基于原子力显微镜和激光粒度测试结果，提出空化产生的纳米气泡在疏水性黄铁矿表面优先生成并引发的疏水性团聚是改善微细粒矿物分选的主要途径。
关键词:
浮选；金矿；纳米气泡；微细粒；动力学；丁基黄药
Abstract:
A comparative study was conducted on laboratory nanobubble flotation and conventional flotation for fine crushed ore samples from an ore-dressing plant. The study investigated the effects of different reagent dosages on the flotation performance of microfine-grained gold ore,with -0.074 mm particles accounting for 92 % of the sample. The results showed that nanobubble flotation significantly improved the Au grade and Au recovery of gold concentrate,as well as the flotation rate. In a closed-circuit flotation process with once roughing,three times cleaning,and twice scavenging,nanobubble flotation achieved a concentrate with an Au grade of 35.32 g/t and a recovery rate of 93.11 %.Compared with conventional flotation,the introduction of nanobubbles increased the Au grade of the concentrate by 3 g/t and the Au recovery rate by 12.33 percentage points. Based on atomic force microscopy and laser particle size analysis,it was proposed that nanobubbles generated by cavitation preferentially form on the hydrophobic surface of pyrite and induce hydrophobic agglomeration,thereby improving the separation of fine-grained minerals.
Keywords:
flotation;gold ore;nanobubbles;microfine particles;kinetics;butyl xanthate
