Quantum Mechanics Simulation on Adsorption Behavior and Flotation Mechanism of Combined Sodium Oleic Acid and Oleamide onto Fluorapatite Surface in an Aqueous Environment | ||
| Journal of Mining and Environment | ||
| مقاله 1، دوره 16، شماره 4، مهر و آبان 2025، صفحه 1153-1163 اصل مقاله (1.95 M) | ||
| نوع مقاله: Original Research Paper | ||
| شناسه دیجیتال (DOI): 10.22044/jme.2025.14708.2781 | ||
| نویسندگان | ||
| Kwang Sok Jong* 1؛ Chang Il Kim1؛ Song Chol Kim1؛ Kum Chon Jang2؛ Hyon Hui Jang1 | ||
| 1Faculty of Mining Engineering, Kim Chaek University of Technology, Pyongyang, DPR Korea | ||
| 2Kim Chaek University of Technology, Pyongyang, DPR Korea | ||
| چکیده | ||
| 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. | ||
| کلیدواژهها | ||
| Fluorapatite Flotation؛ Sodium oleic acid؛ Oleamide؛ Acid number؛ Quantum mechanics | ||
| مراجع | ||
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