基于高梯度磁场与离心场协同作用强化弱磁性矿物分选效率的机理研究

项目名称： 基于高梯度磁场与离心场协同作用强化弱磁性矿物分选效率的机理研究

项目编号： No.51504291

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 矿业工程

项目作者： 卢东方

作者单位： 中南大学

项目金额： 20万元

中文摘要： 提高弱磁性矿物资源利用效率，对保障国家工业发展所需原料供应具有重要意义。基于弱磁性矿物较脉石矿物具有密度大、比磁化系数高的物理特性，本项目通过在高梯度磁场中介入离心场，利用离心场“强化重力”和分散矿浆作用，协同高梯度磁场提高弱磁性矿物的分选效率，以高梯度磁场与离心场协同力场中弱磁性矿物分选机理为研究对象，结合理论计算、有限元多力场耦合仿真及实验研究方法，研究分选区域内的协同力场分布、力场作用下颗粒的受力状态及运动轨迹，进行协同力场中矿物颗粒分选过程表征、弱磁性矿物捕获模型和分选效率模型构建，旨在解决高梯度磁选技术目前存在的分选过程中机械夹杂严重、分选效率及磁精矿富集比低等问题，为弱磁性矿物高效选矿装备的设计、制造提供理论依据，这一研究成果也将为矿物分选尤其是弱磁性矿物的高效分选提供新的途径。

中文关键词： 高梯度磁场；离心场；协同作用；弱磁性矿物；有限元仿真

英文摘要： It's important to increase the utilization ratio of weakly magnetic resources for providing enough raw for the national industrial development. In this project, based on the different physical characteristics that weakly magnetic minerals have much greater density and magnetic susceptibility than the gangue, the separation efficiency of weakly magnetic resources will be improved by taking the centrifugal field into high gradient magnetic field and using the function of centrifugal field in strengthening pulp dispersion and ''gravity force'', with the separating mechanism of weakly magnetic mineral in centrifugal and magnetic complex stress field as the study objective, theoretical analysis, coupled simulation of the multiple forces field and experiments verification will be combined to conduct the research on distribution of the force field, the forces acting on particles and particles' trajectory, then, the separation principle ,capture model and separation efficiency model of weakly magnetic mineral will be represent and build, the aim of this study is to resolve the problems of low separation efficiency and enrichment rate existing in high gradient magnetic separation process for the reasons of mechanic inclusion, and provide the theory for designing and manufacturing the high efficiency magnetic separator, the results of this research also will provide the new pathways to the mineral separation, particularly at weakly magnetic resources.

英文关键词： High-Gradient magnetic field;Centrifugal field;Synery;Weakly magnetic minerals; Finite element simulation