实验室小浮选机流态优化对浮选效率影响的试验研究  

Experimental study of the influence on flotation efficiency produced by optimization of the flow regime of small-scale laboratory flotation machine

作　　者：何睿[1] 符东旭[2] 李海涛[2] 张晓涛 岳丽蓉 田玉强 HE Rui;FU Dongxu;LI Haitao;ZHANG Xiaotao;YUE Lirong;TIAN Yuqiang(Xingtai Mine Coal Preparation Plant,Jizhong Energy Co.Ltd.,Xingtai 054000,China;Jizhong Energy Co.Ltd.,Xingtai 054000,China;Central Assay Laboratory,Jizhong Energy Co.Ltd.,Xingtai 054000,China)

机构地区：[1]冀中能源股份公司邢台矿选煤厂,河北邢台054000 [2]冀中能源股份有限公司,河北邢台054000 [3]冀中能源股份有限公司中心化验室,河北邢台054000

出　　处：《选煤技术》2022年第1期15-19,共5页Coal Preparation Technology

摘　　要：为解决实验室小浮选机浮选效率不佳,叶轮转速高导致的产品质量波动大,试验结果精度低的问题,采用Fluent软件对小浮选机内部流场进行了数值模拟,从速度场和湍流度等方面研究了小浮选机内部流场存在的问题,并对其结构进行了优化研究。研究结果表明:在实验室小浮选机叶轮上部加装合适的稳流装置可使矿浆流态得到优化。加装稳流装置前后的对比试验结果表明:该稳流装置能够在分离区形成稳定的上升流,满足了叶轮转速提升的要求,降低了细泥夹带对浮选精煤灰分的影响,可使浮选精煤灰分降低1~2个百分点,且浮选尾煤灰分基本保持不变。The laboratory flotation machine is low in operating efficiency and its products fluctuate in quality because of high impeller speed,causing the test result to be low in accuracy.To tackle these problems,numerical simulation is made of the internal flow field of the laboratory flotation machine using Fluent to explore the flow field-related problems from the aspects of velocity field and turbulence intensity.Meanwhile,a study is made on optimization of the structure of the machine.Study result shows that fitting a flow stabilizing mechanism on top part of impeller can lead to optimization of flow regime of pulp.As evidenced by comparison of test results before and after fitting the flow stabilizer,the flow stabilizer can help form a stable upward current in the separation zone,which can meet the requirement for in-crease of impeller speed,and reduce the adverse effect on ash content of concentrate produced by en-trained fine slime.Through the optimization work,the ash of flotation concentrate is reduced by 1~2 percentage points and the ash of tailings remains basically unchanged.

关 键 词：煤泥浮选 实验室小浮选机 Fluent软件 矿浆流态 稳流装置 叶轮转速 

分 类 号：TD943[矿业工程—选矿]