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摘要:
这是一篇矿物加工工程领域的论文。泡沫浮选是分选矿物颗粒的主要方法，但传统浮选技术所用的常规气泡尺寸较大,对微细颗粒分选效果较差。作为解决微细颗粒分选问题重要手段的纳米气泡因具独特的物理化学性质，在矿物浮选等领域受到广泛关注和深入研究。本文综述了纳米气泡的形成、制备和稳定性方面的研究进展，介绍了纳米气泡浮选在矿物加工和环境治理等方面的应用，并对纳米气泡浮选未来的研究和发展进行了展望。
Abstract:This is an article in the field of mineral processing engineering. Froth flotation is the main method for separating mineral particles. However, the conventional bubble size used in traditional flotation technology is relatively large, and the separation effect of fine particles is poor. As an important means to solve the problem of fine particle separation, nano bubbles have attracted extensive attention and in-depth research in the field of mineral flotation because of their unique physical and chemical properties. This article summarizes the research progress in the formation, preparation and stability of nano bubbles, introduces the application of nano bubble flotation in mineral processing and environmental treatment, and looks forward to the future research and development of nano bubble flotation.
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Key words:
- Mineral processing engineering /
- Nanobubble /
- Flotation /
- Fine particles /
- Hydraulic cavitation
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图 1 乙醇和水的温度为30 ℃时，不同环境温度下纳米气泡随时间的稳定性：(A) 21 ℃下20 min，(B) 21 ℃下2 d，(C) 23 ℃下额外一天，(D) 25 ℃下第二天（开始日后的第5天）
Figure 1.
图 2 （a）STXM测量水电解产生的高密度氧气纳米气泡示意；（b）纳米气泡中氧气吸收光谱与 50 atm 压力下氧气吸收光谱对比；（c）计算不同尺寸纳米气泡内部氧气密度以及周围水中氧气浓度
Figure 2.
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