东北大学学报（自然科学版）

东北大学学报:自然科学版 ›› 2018, Vol. 39 ›› Issue (9): 1337-1342.DOI: 10.12068/j.issn.1005-3026.2018.09.024

• 资源与土木工程 • 上一篇    下一篇

搅拌强度对浮选机内液-固两相流场特性影响

王学涛， 魏德洲， 高淑玲， 崔宝玉   

  1. (东北大学 资源与土木工程学院， 辽宁 沈阳110819)
  • 收稿日期:2017-05-22 修回日期:2017-05-22 出版日期:2018-09-15 发布日期:2018-09-12
  • 通讯作者: 王学涛
  • 作者简介:王学涛(1990-)，男，辽宁朝阳人，东北大学博士研究生; 魏德洲(1956-)，男，河南南阳人，东北大学教授，博士生导师.冯明杰(1971-)， 男， 河南禹州人， 东北大学副教授; 王恩刚(1962-)， 男， 辽宁沈阳人， 东北大学教授，博士生导师.
  • 基金资助:
    国家自然科学基金资助项目(51504054); 中央高校基本科研业务费专项资金资助项目(N170104016，N170106004).国家自然科学基金资助项目(51171041).

Effects of Stirring Intensity on the Flow Field Characteristics for Liquid-Solid Two Phases in Flotation Machine

WANG Xue-tao， WEI De-zhou， GAO Shu-ling， CUI Bao-yu   

  1. School of Resources & Civil Engineering， Northeastern University， Shenyang 110819， China.
  • Received:2017-05-22 Revised:2017-05-22 Online:2018-09-15 Published:2018-09-12
  • Contact: WEI De-zhou
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摘要： 采用标准k-ε湍流模型和流体颗粒模型对容积为20 L的KYF浮选机内液-固两相流场特性进行了数值模拟.研究结果表明:浮选机内流场呈上下两循环分布，混合、上升区流速高于分离区;在混合及上升区，颗粒运动速度与其粒度呈反比关系，在分离区则呈正比关系;定子、转子表面高压区均位于叶片迎风面，其表面绝对压力与搅拌强度呈正比关系;搅拌强度增加，混合、上升区的矿物颗粒体积分数降低，分离区体积分数增加;混合、上升区固相体积分数与其粒径呈正比关系，分离区呈反比关系;转子转速为600r/min的搅拌强度更有利于提高该浮选机工作性能.

关键词: KYF浮选机, 搅拌强度, 液-固两相流, 流场特性, 数值模拟

Abstract: The internal flow field characteristics of KYF flotation machine of 20 L for liquid-solid two phases were numerically simulated using standard k-ε turbulence model and particle model. The study results show that the flow field in the flotation machine distributes into two cycles up and down， the flow velocity of the mixing and rising zones is higher than that of separating zone. The velocity of mineral particles in mixing and rising zones is inversely proportional to particle size， while the velocity in the separating zone is proportional to particle size. The higher pressure distribution zone is located at the windward of the stator or impeller respectively. Besides， the absolute pressure is proportional to the stirring intensity. The volume fraction of particles is proportional to the particles size in mixing and rising zones and it decreases with the increasing of stirring intensity， which is contrary to the separating zone. Therefore， the rotational impeller speed of 600r/min is more advantageous to improve the working performance of the flotation machine.

Key words: KYF flotation machine, stirring intensity, liquid-solid two phases flow, flow field characteristics, numerical simulation

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