(1. 中南大學(xué) 能源科學(xué)與工程學(xué)院，長沙 410083；
2. 中南大學(xué) 資源加工與生物工程學(xué)院，長沙 410083)
摘 要: 浮選過程中顆粒相的輸運(yùn)行為對浮選效率有著直接的影響，根據(jù)顆粒間的相互作用理論，建立了浮選過程中待浮礦粒在氣泡與液相中的輸運(yùn)方程。以實驗室CPT浮選柱為研究對象，采用歐拉雙流體模型計算氣-液兩相基本流場并耦合浮選過程礦粒輸運(yùn)的方法，獲得礦粒在氣-液兩相中穩(wěn)定的濃度場分布，實現(xiàn)浮選過程中氣-液-固三相流動數(shù)值模擬。結(jié)果表明：實驗室CPT浮選柱中發(fā)泡區(qū)域周圍存在較大漩渦，具有較低的礦粒濃度，柱中氣泡與礦粒的平均碰撞速率為2.156×108 m-3？s-1，平均碰撞概率、捕獲概率和脫附概率分別為0.017、0.904和0.097。
關(guān)鍵字: 浮選柱；顆粒輸運(yùn)；數(shù)值模擬
（1. School of Energy Science and Engineering, Central South University, Changsha 410083, China;
2. School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China）
Abstract:The transport behavior of the particle phase has a direct impact for flotation efficiency in the flotation process. Based on the theory of the interaction of particles, the transport equation for mineral particles to be floating in the bubbles and the liquid phase of the flotation process was conducted. The laboratory CPT flotation column was studied with Eulerian two-fluid model to calculate the gas-liquid two-phase flow, which was coupled with the method for mineral particles transport in flotation process to obtain concentration field distribution of the mineral particles in the gas-liquid two-phase. The gas-liquid-solid three-phase flow simulation in the flotation process was achieved with the methods above. The results show that large whirlpools are found around the flotation foam area in laboratory CPT column, and the flotation foam area has lower concentration of mineral particles, the average collision rate between bubbles and mineral particles in the column is 2.156×108 m-3？s-1, and the average probabilities of collision, adhesion and detachment are 0.017, 0.904 and 0.097, respectively.
Key words: flotation column; particle transport; numerical simulation
