分选黄铁矿用旋流器结构研究

发布时间：2018-04-04 13:09

本文选题：旋流器　切入点：模拟　出处：《武汉科技大学》2015年硕士论文

【摘要】：本研究以凡口铅锌矿选硫系统中的粗精矿为对象，用不同锥角的旋流器进行粗精矿的分选试验，希望能够找到一组最佳的旋流器的结构参数，适合该粗精矿的分选。基于以上的目的，首先进行了水力旋流器的模拟研究。分别以3组不同锥角旋流器为模型，通过水力旋流器的清水模拟和颗粒相模拟，得到了不同锥角旋流器的速度、压力分布图。并对二次流和密度分布图进行了详细的分析，能够较好的解释不同锥角旋流器对矿物的分选行为。其次设计了大锥角旋流器的正交试验。试验的因素为：旋流器的锥角、溢流管直径、沉砂嘴直径和溢流管长度。通过正交试验方差分析，找到了影响水力旋流器的沉砂品位和回收率的因素的大小顺序，同时也表明了大锥角旋流器并不能高效的分选该粗精矿，这与模拟结果一致。最后做了10°锥角旋流器和复锥旋流器的单因素条件试验，并以沉砂硫品位不低于46.5%为基准，分别找到了每组条件下的最佳的结构参数。选择复锥旋流器为分选该粗精矿的设备，将该旋流器进行放大，成功运用于该选硫系统，取得了很好的经济效益。通过模拟和试验表明，小锥角旋流器是该粗精矿较好的分选设备，，这与传统的认识大锥角旋流器是好的分选设备相反，同时也表明模拟能够较好的指导旋流器的运用。
[Abstract]:In this paper, the coarse concentrate in the sulfur separation system of Fankou Pb-Zn Mine is taken as the object, and the separation test of coarse concentrate is carried out by using the cyclone with different conical angles. It is hoped that a group of optimum structural parameters of the cyclone can be found, which is suitable for the separation of the coarse concentrate.Based on the above purpose, the hydrocyclone simulation is first carried out.Using three groups of hydrocyclone with different cone angle as model, the velocity and pressure distribution of hydrocyclone with different cone angle were obtained by water simulation and particle phase simulation.The secondary flow and density distribution map are analyzed in detail, which can better explain the separation behavior of minerals by different cone angle hydrocyclones.Secondly, the orthogonal test of large cone angle hydrocyclone is designed.The factors are as follows: cone angle of cyclone, diameter of overflow pipe, diameter of sand sink nozzle and length of overflow pipe.Through the analysis of variance of orthogonal test, the order of factors influencing the settling grade and recovery rate of hydrocyclone is found, and it is also shown that the large cone angle cyclone can not separate the coarse concentrate efficiently, which is consistent with the simulation results.Finally, the single-factor tests of 10 掳cone-angle hydrocyclone and complex cone hydrocyclone are carried out, and the optimum structural parameters under each group of conditions are obtained based on the standard of not less than 46.5% of the sulfur grade of sand sinking.The complex cone cyclone is selected as the equipment for separating the coarse concentrate, and the hydrocyclone is amplified and successfully applied to the sulfur separation system, and good economic benefits are obtained.The simulation and experiment show that the small cone angle cyclone is a better separation equipment for the coarse concentrate, which is contrary to the traditional understanding that the large cone angle cyclone is a good separation equipment. It also shows that the simulation can better guide the application of the cyclone.
【学位授予单位】：武汉科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD455

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