引流介质充填强化旋流-静态浮选过程及快浮机制研究

Medium filling can improve the flotation environment effectively. The traditional sieve trays and fillings only could partially inhibit the cyclone flow and usually generate pulp jam. So we put forward the guiding fluid packed media to solve the contradiction of strong cyclonic flow and static separation in the cyclone-static microbubble flotation column. Firstly, the study of guiding fluid medium and its high efficient mode are carried out, including the channel form, shape, material, aperture, thickness, porosity and packed layer, packed height, layout style etc.. Based on the result above, through testing the flow field, the motion and velocity distribution of slurry and bubble are studied to reveal the dispersion and guiding action process of packed media to move up the strongly cyclone flow. By means of numerical simulation of flow field, the axial mixed diffusion degree and bubble-particle collision probability equation in packed flotation column is calculated, so as to reveal the mechanism of guiding fluid packed media. By using guiding media packed mode, to create an overall mineral separation environment which is suitable to its floatability process characteristic, to achieve stable and fast floating of easy floating minerals and intensive flotation of hard floating minerals, and deepen the theory and method of fast flotation mechanism in the condition of medium filling.By using guiding medium, to create a overall environment which is beneficial to the that are based on the floatability process characteristics of mineral, to achieve stable and fast floating of easy floating minerals and intensive flotation of hard floating minerals, to verify the feasibility and effectiveness of flotation separation theory and the method of fast flotation mechnaism, and to deepen the development and utilization depth of flotation column separation process in china.

介质充填可有效改善浮选环境。传统筛板和填料仅是部分抑制旋流且易堵塞，据此拟设计引流介质充填，以解决强旋流与静态浮选之间的矛盾。项目首先研究引流介质及其高效充填模式，包括对通道形式、形状、材质、孔径、片厚、空隙率和充填的层数、高度、布置方式等在内的系统研究和配置。在此基础上，通过流场测试，分析矿浆、气泡的运动与速度分布，揭示充填介质对上移强旋流的分散和引流作用过程，通过流场软件数值模拟手段，计算引流介质充填浮选柱的轴向混合扩散度和气泡与矿粒碰撞概率方程式，揭示引流介质充填的作用机理。通过引流介质充填模式，创造一个适合可浮性过程特征的矿物的分选环境，实现易浮矿物的平稳快浮和难浮矿物的强化分选，深化引流介质充填条件下的快浮机制分离理论和方法。

本项目“引流介质充填强化旋流-静态浮选过程及快浮机制研究”针对旋流-静态微泡浮选柱的旋流上移而引起静态浮选分离环境的不稳定、降低浮选回收率问题提出并设计引流 介质充填，解决强旋流与静态浮选之间的矛盾。项目首先研究引流介质及其高效充填模式， 包括对通道形式、形状、材质、孔径、片厚、空隙率和充填的层数、高度、布置方式等在内的 系统研究和配置。在此基础上，通过流场测试和湍流环境下颗粒-气泡脱附过程的研究，分析矿浆、气泡的运动与速度分布，揭示充填介质对上移强旋流的分散和引流作用过程，揭示湍流涡引起浮选回收率降低的机理和脱附模型。通过流场软件数值模拟手段，计算引流介质充填浮选柱的轴向混合扩散度和气泡与矿粒碰撞概率方程式，揭示引流介质充填的作用机理。最后研究硫化铜的可浮性过程特征，介质充填浮选柱用于硫化铜矿分选中，使可浮性好的矿物快速浮出，可浮性差的矿物进入中矿循环，既提高浮选效率又减轻后续循环压力，形成快浮机制。通过引流介质充填模式，创造一个适合可浮性过程特征的矿物的分选环境，实现易浮矿物的平稳快浮和难浮矿物的强化分选，深化引流介质充填条件下的快浮机制分离理论和方法。迄今，在学术期刊和国际学术会议上发表学术论文5篇。