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Effect of high-speed shear flocculation on the flotation kinetics of ultrafine microcrystalline graphite

发布时间：2023-01-30点击次数：

  • DOI码：10.1016/j.powtec.2021.10.041
  • 发表刊物：Powder Technology
  • 关键字：Shear flocculation；Flotation kinetics；Microcrystalline graphite；Particle aggregates
  • 摘要：A novel process combining high-speed shear flocculation and flotation (SFF) was proposed to beneficiate ultrafine microcrystalline graphite (MG). The effect of high-speed shear flocculation on the flotation kinetics of ultrafine MG was investigated extensively by comparing with conventional flotation process. The flotation kinetics of these two processes were fitted with six flotation kinetic models using 1stOpt statistical analysis software. The results show that the flotation rate of MG in the SFF process is about 3 times as fast as that in the conventional flotation process based on the first-order model with rectangular distribution of flotabilities. On one hand, the high-speed shear flocculation process resulted in increasing size of graphite aggregates. On the other hand, it generated decreasing size of kerosene droplets, which in turn benefited the increase in the size of graphite aggregates due to the improved hydrophobicity of graphite particle surface. The increased aggregates were responsible for the increase in flotation rate of MG in the SFF process. In addition, the SFF process could also improve the concentrate grade and recovery of MG in comparison with conventional flotation. The utilization of the SFF technology to separate ultrafine MG is of great potential in industrial applications.
  • 论文类型：期刊论文
  • 卷号：396
  • 页面范围：345-353
  • 是否译文：否
  • 发表时间：2022-01-01
  • 收录刊物：SCI、EI
  • 发布期刊链接：https://www.sciencedirect.com/science/article/pii/S0032591021009232

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    博士生导师
    硕士生导师
  • 教师拼音名称：yuhesheng
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  • 所在单位：化工学院
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  • 性别：男
  • 学位：博士
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  • 毕业院校：加拿大滑铁卢大学

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  • 2020当选：江苏特聘教授

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  • 2020-08-01江苏特聘教授
  • 2014-10-15加拿大国家自然科学基金工业博士后奖学金
  • 2020-08-01中国矿业大学“高端人才计划”攀登学者
  • 2019-06-01江苏省“六大人才高峰”高层次人才
  • 2018-06-28江苏省“双创博士”
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