Froth flotation via microparticle stabilized foams

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• 作者：Oliver Zech ; Martin F. Haase ; Dmitry G. Shchukin ; Thomas Zemb ; Helmuth Moehwald
• 关键词：Flotation ; Foams ; Microparticles ; Rare earth oxides ; Separation chemistry
• 刊名：Colloids and Surfaces A: Physicochemical and Engineering Aspects
• 出版年：2012
• 出版时间：5 November, 2012
• 年：2012
• 卷：413
• 期：Complete
• 页码：2-6
• 全文大小：457 K

文摘

There is a still growing interest in the recovery of rare earth elements due to their manifold industrial and technological applications. We present here a simple and effective method for the enrichment of micrometer sized La₂O₃ particles via microparticle stabilized foams. By using the short chain amphiphile (1-hexyl)trimethylammonium bromide (C₆TAB) foam that is generated by surface modified particles only can be generated. This technique allows a more selective and specific particle transport mechanism. The results are discussed in terms of surface charges and transport mechanisms. Furthermore, the effects of particle concentration, pH and amphiphile concentration are studied and evaluated.