基于形状差异的时间/空间协同脉动气流场鳞片石墨分选机制

批准号:
52004294
项目类别:
青年科学基金项目
资助金额:
24.0 万元
负责人:
李吉辉
依托单位:
学科分类:
矿物工程与物质分离
结题年份:
2023
批准年份:
2020
项目状态:
已结题
项目参与者:
李吉辉
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中文摘要
鳞片石墨是宝贵的战略储备资源,通常采用浮选法进行分选。目前我国石墨资源逐步向西北地区转移,当地匮乏的水资源与浮选过程水资源消耗之间的矛盾以及磨浮工艺对石墨鳞片的破坏成为石墨分选面临的重要问题。项目依据鳞片石墨平板结构与脉石颗粒形状间的显著差异引起的绕流曳力不同,联合脉动气流加速度累积效应,提出基于形状差异的鳞片石墨时间/空间协同脉动气流干法分选新机制。采用平面波动理论、计算机模拟和PIV测定研究时间、空间脉动气流场结构特性与协同效应;联合计算机模拟和高速动态监测构建不同形状颗粒在脉动流场中的曳力系数修正模型;以BBO方程为基础综合分析颗粒在脉动气流场中的受力情况,构建运动微分方程,实现流场特性与形状参数的耦合;掌握基于颗粒形状差异分离的动力学调控规律,强化不同形状颗粒在气流场中的运动差异,构建脉动气流场中鳞片石墨高效分选机制。项目成果为鳞片石墨气流干法分选的科学研究和实践提供理论依据。
英文摘要
Flake graphite is one of the valuable strategic reserve resources in China and usually separated by flotation. At present, China's graphite resources are gradually transferred to the northwest region. The contradiction between the shortage of local water resources and the huge consumption demand for water in the flotation process and the destruction of graphite flake have become important problems in the separation of graphite. In this project, a new beneficiation mechanism of flake graphite in time-space collaborative pulsating airflow based on shape difference is proposed according to the different traction forces in the flow caused by the significant difference between the plate structure of flake graphite and the shape of gangue particle and the cumulative acceleration effect of pulsing airflow. Plane-wave theory, computer simulation and PIV measurement would be used together to study the structural characteristics and synergistic effect of time and space pulsing flow field. Combining with computer simulation and high-speed dynamic monitoring, the drag coefficient correction model of particles with different shapes in the pulsing flow field would be constructed. Based on the BBO equation, the forces on particle would be comprehensively analyzed, and the differential equation of motion would be established in the pulsing airflow field to realize the coupling between the characteristics of the flow field and the shape parameters. The kinetic regulation law based on particle shape parameter separation would be mastered to strengthen the movement difference of particles with different shapes in the airflow field. Especially, the efficient separation mechanism of flake graphite in the pulsing airflow field would be constructed. On the basis of the results of the project, we aim to provide a theoretical basis for the scientific research and practice of dry air separation of flake graphite.
期刊论文列表
专著列表
科研奖励列表
会议论文列表
专利列表
DOI:10.1080/19392699.2023.2270914
发表时间:2023
期刊:International Journal of Coal Preparation and Utilization
影响因子:2.1
作者:Hongguang;Wei Chen;Xuegang Kang;Gen Huang;Jihui Li;Liqiang Ma
通讯作者:Liqiang Ma
DOI:10.3390/ma14175067
发表时间:2021-09-04
期刊:Materials (Basel, Switzerland)
影响因子:--
作者:Tang J;Wei L;He S;Li J;Nan D;Ma L;Shen W;Kang F;Lv R;Huang Z
通讯作者:Huang Z
DOI:10.1016/j.electacta.2022.141210
发表时间:2022-09
期刊:Electrochimica Acta
影响因子:6.6
作者:Luo Wei;Qingtao Yu;Xiaoyong Yang;Jihui Li;W. Shen;F. Kang;R. Lv;Liqiang Ma;Zhenghong Huang-Zhenghong-H
通讯作者:Luo Wei;Qingtao Yu;Xiaoyong Yang;Jihui Li;W. Shen;F. Kang;R. Lv;Liqiang Ma;Zhenghong Huang-Zhenghong-H
DOI:10.1021/acsomega.1c00591
发表时间:2021-04-13
期刊:ACS omega
影响因子:4.1
作者:Li J;Liu R;Ma L;Wei L;Cao L;Shen W;Kang F;Huang ZH
通讯作者:Huang ZH
DOI:--
发表时间:2023
期刊:实验技术与管理
影响因子:--
作者:李吉辉;王泽斌;许建汶;孙凯;张灿彧;郭义开;黄根;马力强
通讯作者:马力强
国内基金
海外基金
