磁性差异影响矿物磁选行为的离散元模拟
首发时间:2015-06-10
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。本文基于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0.2776m/s增加到0.8329m/s,平均不平衡力最大值由0.1613N增加到0.2027N,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。
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Discrete Element Simulation of Different Magnetic Properties Affect the Behavior of Mineral Magnetic Separation
Abstract:Magnetic enhancement technology can effectively improve the effect of mineral magnetic separation effect, the research of magnetic enhancement mechanism is 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 respond ahead, respond number incresse, the ability to overcome the cover pressure of other mineral particles are enhanced; In the middle, the maximum velocity of magnetic particles improved from 0.2776 m/s to 0.8329 m/s, maximum mean unbalanced force improved from 0.1613N to 0.2027N, response becomes more intense; In the last, the magnetic particles damping time becomes shorter, and the adsorbed stability increased.
Keywords: magnetic separation magnetic enhancement discrete element method numerically simulation
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