Behavior and mechanism of collophane and dolomite separation using alkyl hydroxamic acid as a flotation collector

• Autorzy: Yu J. , Ge Y. , Hou J.

Identyfikatory

DOI

10.5277/ppmp160114

• Języki publikacji: EN

Abstrakty

EN

Flotation response of collophane and dolomite using alkyl hydroxamic acid (AH) (chelating collector) was investigated in the paper. The experiments were performed using pure and artificially mixed minerals as well as a real phosphate ore. Their separation mechanisms were studied by means of zeta potential measurements, infrared analysis, adsorption measurements, thermodynamics, and quantum chemical calculations. The results indicated that AH exhibited an excellent performance in the flotation separation of collophane from dolomite in neutral medium. The P2O5 grade of the concentrate increased from 19.84% to 30.51% without any other reagents when the pH value was about 7. The zeta potential and adsorption studies showed that the adsorption of AH at the cellophane/aqueous interface was greater than that at dolomite surface, which was the essential reason that separation of collophane from dolomite. The results of Fourier Transform Infrared (FTIR) spectrum and thermodynamics calculation indicated that the adsorption of AH at collophane was attributed to the chemical bonding. Moreover, AH molecule formed O-O five-membered ring with calcium ion on the collophane surface.

Słowa kluczowe

EN

hydroxamic acid; collophane; dolomite; separation mechanism

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Physicochemical Problems of Mineral Processing
• Rocznik: 2016
• Tom: Vol. 52, iss. 1
• Strony: 155--169
• Opis fizyczny: Bibliogr. 20 poz., rys., tab.

Twórcy

autor

Yu J.

• School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, PR China

autor

Ge Y.

• School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, PR China

autor

Hou J.

• School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, PR China

Bibliografia

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