Cooperative effects of quaternary ammonium salt collectors and cationic polyacrylamide on flotation separation of diaspore and kaolinite: Experimental study and simulation

IF 5.3 2区化学 Q2 CHEMISTRY, PHYSICAL

Journal of Molecular Liquids Pub Date : 2024-11-28 DOI:10.1016/j.molliq.2024.126605

Suhong Zhang , Yue Ma , Kai Wang , Xiufeng Shao , Jianfei Ding

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Abstract

In the presence of depressant cationic polyacrylamide (CPAM), three quaternary ammonium salt as collectors were used in the flotation separation of diaspore and kaolinite, respectively. The flotation results of single minerals showed that the high recovery of the kaolinite and the low recovery of diaspore were gained, which indicated that the floatability of kaolinite was hardly affected while the floatability of diaspore was obviously weakened by using Gemini collector and CPAM under the conditions of pulp pH value of 6. The mass ratio of Al₂O₃ to SiO₂ (A/S) was also increased from 4.86 to 8.90. FTIR spectra, adsorption capacity of collectors and zeta potential analysis illustrated that the maximum difference value in adsorption capacity of Gemini collector on the surface of kaolinite and diaspore was obtained because of the differences of the collectors in the presence of CPAM. This phenomenon was further supported by molecular dynamics simulation analysis and XPS analysis. The opinion can be provided that the difference between kaolinite and diaspore was enlarged by regulating the cooperation of the collector and the depressant for increasing the flotation separation of minerals.

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来源期刊

Journal of Molecular Liquids 化学-物理：原子、分子和化学物理

CiteScore

10.30

自引率

16.70%

发文量

2597

审稿时长

78 days

期刊介绍： The journal includes papers in the following areas: – Simple organic liquids and mixtures – Ionic liquids – Surfactant solutions (including micelles and vesicles) and liquid interfaces – Colloidal solutions and nanoparticles – Thermotropic and lyotropic liquid crystals – Ferrofluids – Water, aqueous solutions and other hydrogen-bonded liquids – Lubricants, polymer solutions and melts – Molten metals and salts – Phase transitions and critical phenomena in liquids and confined fluids – Self assembly in complex liquids.– Biomolecules in solution The emphasis is on the molecular (or microscopic) understanding of particular liquids or liquid systems, especially concerning structure, dynamics and intermolecular forces. The experimental techniques used may include: – Conventional spectroscopy (mid-IR and far-IR, Raman, NMR, etc.) – Non-linear optics and time resolved spectroscopy (psec, fsec, asec, ISRS, etc.) – Light scattering (Rayleigh, Brillouin, PCS, etc.) – Dielectric relaxation – X-ray and neutron scattering and diffraction. Experimental studies, computer simulations (MD or MC) and analytical theory will be considered for publication; papers just reporting experimental results that do not contribute to the understanding of the fundamentals of molecular and ionic liquids will not be accepted. Only papers of a non-routine nature and advancing the field will be considered for publication.