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Journal of Mining and Environment، جلد ۱۶، شماره ۴، صفحات ۱۱۵۳-۱۱۶۳
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عنوان انگلیسی Quantum Mechanics Simulation on Adsorption Behavior and Flotation Mechanism of Combined Sodium Oleic Acid and Oleamide onto Fluorapatite Surface in an Aqueous Environment
چکیده انگلیسی مقاله In this study, the effects of various reagents-sodium carbonate and sodium hydroxide as pH regulators, calcium lignosulfonic acid as depressant, and combined sodium oleate and amide as collector on the flotation of apatite ore were investigated using flotation experiments, and adsorption mechanism of collector on apatite surface were evaluated using quantum mechanical simulations. The flotation experiments showed that the addition of 4 kg/t sodium carbonate and 1.5 kg/t sodium hydroxide as pH regulators, 3 kg/t calcium lignosulfonic acid as depressant and 60 g/t combined sodium oleic acid and oleamide (acid number of collector; 105 mgKOH/g) as collector exhibited excellent collecting ability for apatite. From low-grade apatite ore with P2O5 7.05%, a concentrate with P2O5 31.42% was obtained with 81.08% recovery in rougher flotation. Compared with the simulation results for the interaction energy between apatite {001} surface and collectors, and the relative concentration of collector on apatite {001} surface, adsorption strength has following order; combined sodium oleic acid and oleamide > sodium oleic acid > oleamide. From the simulation results on the equilibrium configuration of the collector with the fluorapatite {001} surface in the liquid environment, it was revealed that the two atoms (N and H) of the oleamide can form a strong bidentate conformation, and O atom in the C-O group and that in -C=O group of oleic acid anion can bond with the Ca atom on the surface {001} to form monodentate conformation.
کلیدواژه‌های انگلیسی مقاله Fluorapatite Flotation,Sodium oleic acid,Oleamide,Acid number,Quantum mechanics
نویسندگان مقاله Kwang Sok Jong |
Faculty of Mining Engineering, Kim Chaek University of Technology, Pyongyang, DPR Korea

Chang Il Kim |
Faculty of Mining Engineering, Kim Chaek University of Technology, Pyongyang, DPR Korea

Song Chol Kim |
Faculty of Mining Engineering, Kim Chaek University of Technology, Pyongyang, DPR Korea

Kum Chon Jang |
Kim Chaek University of Technology, Pyongyang, DPR Korea

Hyon Hui Jang |
Faculty of Mining Engineering, Kim Chaek University of Technology, Pyongyang, DPR Korea

نشانی اینترنتی https://jme.shahroodut.ac.ir/article_3440_a0ad0e6f9b61bd2f53b71388a61bc999.pdf
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