Optimization of geometrical parameters of the hydro-cyclone inertial Venturi separator

IF 2.4 Q2 MINING & MINERAL PROCESSING
Vladimir N. Makarov, A. Ugolnikov, Nikolay V. Makarov
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引用次数: 1

Abstract

The usage of nanosized particles as modifying agents opens new possibilities in the creation of materials with unique properties. The effective qualitative improvement of Russia's GDP structure is based on the recycling of technogenic mineral formations (TMF) and the production of high-tech products. Numerous studies have shown that the efficiency of this process is limited by high requirements to the fractional composition, median size, and dispersion of TMF particles, as well as imperfection of equipment and technology and their classification. The strict classification requirements must be taken into account, when developing separation methods for the dispersion of the median sizes of TMF microparticles under the conditions of the probabilistic distribution of the physical and mechanical parameters of the feed. The studies covered in the article are based on the provision on a significantly greater influence of inertial forces on the trajectory of a hydrodynamically unsteady motion of the dispersed «a microparticle – a drop of liquid» system during the hydro-cyclone separation with respect to the aerodynamic forces of their movement in a fluidized bed. The paper shows that within the range of kinetic energy of the translational motion of liquid droplets, which overcomes the aerodynamic barrier of coagulation of hydrophobic TMF particles, the minimum diameter of absorbed microparticles during hydro-cyclone coagulation depends only on the magnitude of the angular velocity of rotation of the liquid droplets.We obtained the equations for the Euler and Reynolds criteria, their average values, and the relaxation time of liquid droplets with integrated micro and nanoparticles of TMF, depending on their median size during hydro-cyclone separation. The developed mathematical model of inertial hydro-cyclone separation of finely dispersed TMF allows determining the optimal geometric parameters and energy characteristics of the Venturi separator, its aerator, and the position of the receiving tanks.The experimental results confirmed the possibility of classifying finely dispersed wastes of mining and metallurgical production in the range of median sizes (0.5-5)∙10–6 m by fractions with a dispersion of not more than 20 %.
水力旋流器惯性文丘里分离器几何参数的优化
纳米粒子作为改性剂的使用为创造具有独特性能的材料开辟了新的可能性。俄罗斯国内生产总值(GDP)结构的有效质的改善是建立在技术矿物地层(TMF)的回收和高科技产品的生产基础上的。大量研究表明,由于对TMF颗粒的分级组成、中位数尺寸和分散性要求较高,以及设备和技术及其分类的不完善,限制了该工艺的效率。在进料物理和机械参数概率分布的条件下,开发TMF微粒中位粒径分散的分离方法时,必须考虑到严格的分类要求。本文所涉及的研究是基于在水力旋流器分离过程中,相对于它们在流化床中运动的气动力,惯性力对分散的“一个微粒-一滴液体”系统的流体动力学非定常运动轨迹的显著更大的影响。研究表明,在克服疏水TMF颗粒混凝的气动屏障的液滴平移运动动能范围内,水力旋流器混凝过程中被吸收的微颗粒的最小直径仅取决于液滴旋转角速度的大小。在水力旋流器分离过程中,得到了包含微、纳米粒子的液滴随中值尺寸变化的Euler准则和Reynolds准则方程及其平均值和弛豫时间。建立的惯性水力旋流器分离精细分散TMF的数学模型可以确定文丘里分离器、曝气器和接收罐位置的最佳几何参数和能量特性。试验结果表明,在中位粒径(0.5 ~ 5)∙10 ~ 6 m范围内,采用分散度不超过20%的馏分法对分散较细的矿冶废弃物进行分级是可行的。
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来源期刊
Journal of Mining Institute
Journal of Mining Institute MINING & MINERAL PROCESSING-
CiteScore
7.50
自引率
25.00%
发文量
62
审稿时长
8 weeks
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