Innovative fluidized bed flotation column for fine particle separation

IF 3.7 3区工程技术 Q2 ENGINEERING, CHEMICAL

Chemical Engineering Research & Design Pub Date : 2024-10-02 DOI:10.1016/j.cherd.2024.10.002

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引用次数: 0

Abstract

Flotation columns are extensively utilized to separate fine mineral particles. In highly turbulent environments, the increased collision efficiency between bubbles and particles can lead to improved flotation efficiency of fine particles. The fluidized bed flotation column (FBFC), a new type of flotation equipment, improves the separation efficiency of fine particles by creating a highly turbulent environment in the fluidized zone through the addition of solid particles. This paper investigated the fluidization characteristics, bubble, and gas hold up of the FBFC, along with the flotation efficiency of fine quartz particles. Experimental results showed that introducing gas enhanced the fluidization process in the fluidized bed. The fluidized zone facilitated the fragmentation of bubbles into smaller ones. With increasing liquid velocity, the bubble diameter decreases before subsequently increasing, while the gas holdup initially rises and then declines. The flotation efficiency of fine quartz particles is superior in FBFC with added particles compared to those without added particles. The flotation efficiency of fine particles increases with the rise in both liquid velocity and gas velocity.

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用于细颗粒分离的创新型流化床浮选柱

浮选柱被广泛用于分离细小矿物颗粒。在高湍流环境中，气泡与颗粒之间碰撞效率的提高可提高细颗粒的浮选效率。流化床浮选柱（FBFC）是一种新型浮选设备，通过在流化区加入固体颗粒创造高湍流环境来提高细颗粒的分离效率。本文研究了 FBFC 的流化特性、气泡和气体容纳量，以及细小石英颗粒的浮选效率。实验结果表明，气体的引入增强了流化床的流化过程。流化区有利于气泡破碎成更小的气泡。随着液体速度的增加，气泡直径先减小后增大，而气体截留率则先上升后下降。在添加颗粒的 FBFC 中，细小石英颗粒的浮选效率优于不添加颗粒的 FBFC。细颗粒的浮选效率随着液体速度和气体速度的增加而增加。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Chemical Engineering Research & Design 工程技术-工程：化工

CiteScore

6.10

自引率

7.70%

发文量

623

审稿时长

42 days

期刊介绍： ChERD aims to be the principal international journal for publication of high quality, original papers in chemical engineering. Papers showing how research results can be used in chemical engineering design, and accounts of experimental or theoretical research work bringing new perspectives to established principles, highlighting unsolved problems or indicating directions for future research, are particularly welcome. Contributions that deal with new developments in plant or processes and that can be given quantitative expression are encouraged. The journal is especially interested in papers that extend the boundaries of traditional chemical engineering.