Structure-activity of chelating depressants for chalcopyrite/pyrite separation: DFT study and flotation experiment

• Autorzy: Li Mingyang , Lian De , Zhao Fugang , Tong Xiong , Wu Chaoyang , Gao Xiangpeng

Identyfikatory

DOI

10.37190/ppmp/143082

• Języki publikacji: EN

Abstrakty

EN

Three types of chelating depressants were studied for chalcopyrite/pyrite separation, including S-S, S-O, and O-O types, via density functional theory calculations and microflotation. The calculation results indicate that the depressant’s chelating atoms have large coefficient and great activity according to the molecular frontier orbital (HOMO and LUMO) and the orbital coefficients. For S-S type of depressant, S atom in both keto or enol forms won’t affect their HOMO and LUMO patterns and the orbital contributions. For S-O type, the presence of N atom in the ring structure of a molecular will increase the reactivity of O-Cu while weak S-Cu. For O-O type, the electron supply capacity of benzene ring is higher than strain chain, and atom N in strain chain increased their electron supply capacity. The microflotation results basically confirmed the prediction based on the calculation. The simulation results demonstrate that the interaction of a depressant with metals and minerals are affected obviously by the spatial structure and electronic structure of an atom in its molecular.

Słowa kluczowe

EN

chelating depressants; activity; pyrite; DFT calculations; frontier orbitals

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Physicochemical Problems of Mineral Processing
• Rocznik: 2021
• Tom: Vol. 57, iss. 6
• Strony: 102--112
• Opis fizyczny: Bibliogr. 33 poz., rys. kolor.

Twórcy

autor

Li Mingyang

• Key Laboratory of Metallurgical Emission Reduction & Resources Recycling, Anhui University of Technology, Ministry of Education, Maanshan 243002, China
• School of Metallurgical Engineering, Anhui University of Technology, Ma’anshan 243002, China
• Faculty of Land and Rescource Engineering, Kunming University of Science and Technology, Kunming 650093, China

autor

Lian De

• School of Metallurgical Engineering, Anhui University of Technology, Ma’anshan 243002, China

autor

Zhao Fugang

• Sinosteel Maanshan Institute of Mining Research Co., Ltd., Ma’anshan 243071, China

autor

Tong Xiong

• Faculty of Land and Rescource Engineering, Kunming University of Science and Technology, Kunming 650093, China

autor

Wu Chaoyang

• School of Metallurgical Engineering, Anhui University of Technology, Ma’anshan 243002, China

autor

Gao Xiangpeng

• School of Metallurgical Engineering, Anhui University of Technology, Ma’anshan 243002, China

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