PROPERTIES OF FATTY ACID/DODECYLAMINE MIXTURES AND THEIR APPLICATION IN STEAM COAL REVERSE FLOTATION
PROPERTIES OF FATTY ACID/DODECYLAMINE MIXTURES AND THEIR APPLICATION IN STEAM COAL REVERSE FLOTATION
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DOI：
10.5277/ppmp160126
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发表时间：
2016
影响因子：
1.5
通讯作者：
Liang Shen;Huai-fa Wang
中科院分区：
文献类型：
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作者：
Liang Shen;Huai-fa Wang
制备了一系列由十二胺盐酸盐（DAH）和脂肪酸（FAD）组成的混合表面活性剂。研究了这些脂肪酸/DAH混合物的表面张力、临界胶束浓度（CMC）和在煤表面的吸附特性。比较了脂肪酸/DAH混合物（FAD）和DAH反浮选的效果。实验结果表明，脂肪酸/ DAH混合物的CMC和γcmc均低于DAH。吸附实验表明，与DAH溶液相比，FAD溶液中更多的胺分子优先吸附在气泡表面。反浮选试验结果表明，在相同的泡沫产率下，表面活性剂用量可节省50%左右。在1.66 kg/Mg DAH存在下，仅获得28%的泡沫产物产率。然而，当使用0.83kg/Mg十六烷酸/DAH混合物（C16 D）表面活性剂时，泡沫产物产率达到29%。十二烷酸/DAH混合物（C12 D）表面活性剂a表现出更好的性能，具有与十四烷酸/DAH混合物（C14 D）类似的高矿物质回收率和比C14 D和C16 D更高的可燃物回收率。
A series of surfactant mixtures which consist of DAH (dodecylamine hydrochloride) and fatty acids (FAD) were made in this study. The characteristics of these fatty acids/DAH mixtures, including surface tension, critical micelle concentration (CMC) and adsorption onto coal were investigated. The reverse flotation results with these fatty acids/DAH mixtures (FAD) and DAH were compared with each other. Experimental results showed that the fatty acids/ DAH mixtures have lower CMC and γcmc than DAH. The adsorption test indicated that more amine molecules would adsorb preferentially onto the bubbles surface in FAD solutions than that in DAH solutions. Reverse flotation results showed that about 50% surfactant dosage was saved under the same froth product yield. Only 28% froth product yield was obtained in the presence of 1.66 kg/Mg DAH. However, when 0.83 kg/Mg hexadecanoic acid/DAH mixture (C16D) surfactant was used, the froth product yield reached 29%. Dodecanoic acid/DAH mixture (C12D) surfactant a showed better performance with a high mineral matter recovery similar to that with tetradecanoic acid/DAH mixture (C14D) and higher combustible recovery than with C14D and C16D.