Mechanism of separating pyrite and dolomite by flotation

Anping Liu1, 2), Wen Ni1), and Wei Wu3) 1) Civil and Environmental Engineering School, University of Science and Technology Beijing, Beijing 100083, China 2) Nanjing Meishan Mining Co. Ltd., Baosteel Group, Nanjing 210041, China 3) Key Lab of the Ministry of Education of China for Nanomaterials, Beijing University of Chemical Technology, Beijing 100029, China

摘 要：To study the mechanism of separating pyrite and dolomite by flotation, the acting mechanisms of WHL depressor and both the minerals were studied by means of thermogravimetric and differential thermal analysis （TG-DTA）, Fourier transform infra-red-diffuse reflection spectroscopy （FTIR-DRS）, and X-ray photoelectron spectroscopy （XPS）. The results indicated that WHL formed metal salts with metal ions dissolved in water from dolomite and pyrite, which then deposited on their surfaces. Both of the minerals could be depressed by WHL. In the process of flotation, sulfur was created besides the WHL being absorbed on the surface of the sulfur concentrate, and its recovery rate was slightly affected.

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