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磁性差异影响矿物磁选行为的离散元模拟
发表时间：2016-06-30 浏览量：7431 下载量：1891
| 全部作者： | 尤培海，张义顺，史长亮，张兵豪，杨记平 |
| 作者单位： | 河南理工大学材料科学与工程学院；中南大学资源加工与生物工程学院 |
| 摘 要： | 矿物磁性强化技术可有效改善矿物磁选效果，磁性强化机理研究意义重大。基于PFC2D离散元软件，数值模拟了锥形磁介质下，煤系黄铁矿磁性强化前后对磁选过程中颗粒动态特性的影响，结果表明：磁性增强，磁选初始态，磁性颗粒位移响应提前，响应数目增多，克服物料堆压作用能力增强；磁选过程中，磁性颗粒速度最大值由0.277 6 m/s增加到0.832 9 m/s，平均不平衡力最大值由0.161 3 N增加到0.202 7 N，响应程度增强；磁选末态，磁性颗粒在磁极表面谐振时间变短，吸附稳定性提高。 |
| 关 键 词： | 选矿机械；磁选；磁性强化；离散元；数值模拟 |
| Title： | Discrete element simulation of different magnetic properties affecting the behavior of mineral magnetic separation |
| Author： | YOU Peihai, ZHANG Yishun, SHI Changliang, ZHANG Binghao, YANG Jiping |
| Organization： | School of Materials Science and Engineering, Henan Polytechnic University; School of Mineral Processing and Bioengineering, Central South University |
| Abstract： | Magnetic enhancement technology can effectively improve the effect of mineral magnetic separation effect, and the research of magnetic enhancement mechanism is of signality. Based on PFC2D discrete element method software, the particle dynamics characteristic mechanism before and after magnetic enhancement under the conical magnetic medium in the magnetic separation process is numerically simulated. Results show that after magnetic enhancement, at the beginning of separation, the displacement of magnetic mineral grains responded ahead, respond number increased, the ability to overcome the cover pressure of other mineral particles was enhanced. In the middle, the maximum velocity of magnetic particles improved from 0.277 6 m/s to 0.832 9 m/s, maximum mean unbalanced force improved from 0.161 3 N to 0.202 7 N, and response became more intense. In the last, the magnetic particles damping time became shorter, and the adsorbed stability increased. |
| Key words： | mineral processing machinery; magnetic separation; magnetic enhancement; discrete element method; numerically simulation |
| 发表期数： | 2016年6月第12期 |
| 引用格式： | 尤培海，张义顺，史长亮，等. 磁性差异影响矿物磁选行为的离散元模拟[J]. 中国科技论文在线精品论文，2016，9（12）：1268-1274. |
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