The role of polyoxyethylene alkyl ethers in apatite flotation at foskor, phalaborwa (South Africa)
作者： E.W. Giesekke , P.J. Harris
DOI: 10.1016/0892-6875(94)00075-1
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摘要: Abstract Batch flotation tests were conducted on a foskorite ore to elucidate the role of polyoxyethylene alkyl ethers (PAE) in fatty acid (FA) recovery apatite at Foskor, Phalaborwa. Only those PAE with narrow distribution relatively short oxyethylene chain lengths are effective promoting recoveries. Adsorption and microflotation studies calcite (gangue mineral) PAE, FA, depressants further process. It is proposed that FA form mixed micelle solution, ‘protecting’ from ‘hard water’ ions solution. More adsorbed than calcite, causing less depressant be co-adsorbed apatite. For longer lengths, their higher adsorption levels prevent particle-bubble contact, due strong repulsive hydration forces associated predominance head groups mineral surface. This favours where adsorbed. shorter effect pronounced, floatability enhanced absorption more calcite.
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