Properties of fatty acid/dodecylamine mixtures and their application in steam coal reverse flotation

• Autorzy: Shen L. , Wang H.

Identyfikatory

DOI

10.5277/ppmp160126

• Języki publikacji: EN

Abstrakty

EN

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.

Słowa kluczowe

EN

steam coal; surfactant mixture; reverse flotation; fatty acids; surface activity

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Physicochemical Problems of Mineral Processing
• Rocznik: 2016
• Tom: Vol. 52, iss. 1
• Strony: 303--316
• Opis fizyczny: Bibliogr. 35 poz., rys., tab.

Twórcy

autor

Shen L.

• College of Mining Engineering, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China

autor

Wang H.

• College of Mining Engineering, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China
• Key Laboratory of Coal Science and Technology of Ministry of Education and Shanxi Province, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China

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Uwagi

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę.