Depressing molybdenite using calcium lignosulfonate in Cu-Mo flotation separation: Interaction and desorption insights

IF 4.2 2区工程技术 Q2 ENGINEERING, CHEMICAL

Advanced Powder Technology Pub Date : 2024-09-25 DOI:10.1016/j.apt.2024.104665

Guanyu Liang, Song Zhang, Yongjun Xian, Luzheng Chen

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Abstract

This study investigated the potential mechanisms by which lignosulfonate selectively depresses the flotation of fine molybdenite during Cu–Mo flotation separation using ethyl potassium xanthate as a collector. The flotation tests confirmed that molybdenite was significantly depressed by calcium lignosulfonate, whereas chalcopyrite flotation was only slightly affected. Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy were employed to explore the distinct interaction of lignosulfonates with the mineral surfaces: chelation/complexation occurred between the deprotonated oxygen-contained groups in calcium lignosulfonate with the exposed metal sites on the surface of chalcopyrite, whereas the hydrophobic interaction between calcium lignosulfonate and molybdenite was the main driving force of adsorption. Additionally, the adsorption experiments suggested that the calcium lignosulfonate previously adsorbed on chalcopyrite could be removed by treatment with ethyl potassium xanthate while there was a relatively small effect on the calcium lignosulfonate previously adsorbed on the surface of molybdenite. Therefore, depressing molybdenite and floating chalcopyrite achieved by using calcium lignosulfonate as the depressant and ethyl potassium xanthate as the collector.

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在铜钼浮选分离中使用木质素磺酸钙抑制辉钼矿：相互作用和解吸的启示

本研究调查了木质素磺酸钙在使用黄原酸乙酯钾作为捕收剂进行铜-钼浮选分离时选择性抑制细粒辉钼矿浮选的潜在机制。浮选试验证实，木质素磺酸钙会明显抑制辉钼矿的浮选，而黄铜矿的浮选只受到轻微影响。傅立叶变换红外光谱和 X 射线光电子能谱被用来探索木质素磺酸盐与矿物表面的不同相互作用：木质素磺酸钙中的去质子化含氧基团与黄铜矿表面暴露的金属位点之间发生了螯合/络合作用，而木质素磺酸钙与辉钼矿之间的疏水作用则是吸附的主要动力。此外，吸附实验表明，用黄原酸乙酯钾处理可以去除黄铜矿上吸附的木质素磺酸钙，而对辉钼矿表面吸附的木质素磺酸钙的影响相对较小。因此，使用木质素磺酸钙作为抑制剂，黄原酸乙酯钾作为捕集剂，可以达到抑制辉钼矿和浮选黄铜矿的目的。

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来源期刊

Advanced Powder Technology 工程技术-工程：化工

CiteScore

9.50

自引率

7.70%

发文量

424

审稿时长

55 days

期刊介绍： The aim of Advanced Powder Technology is to meet the demand for an international journal that integrates all aspects of science and technology research on powder and particulate materials. The journal fulfills this purpose by publishing original research papers, rapid communications, reviews, and translated articles by prominent researchers worldwide. The editorial work of Advanced Powder Technology, which was founded as the International Journal of the Society of Powder Technology, Japan, is now shared by distinguished board members, who operate in a unique framework designed to respond to the increasing global demand for articles on not only powder and particles, but also on various materials produced from them. Advanced Powder Technology covers various areas, but a discussion of powder and particles is required in articles. Topics include: Production of powder and particulate materials in gases and liquids(nanoparticles, fine ceramics, pharmaceuticals, novel functional materials, etc.); Aerosol and colloidal processing; Powder and particle characterization; Dynamics and phenomena; Calculation and simulation (CFD, DEM, Monte Carlo method, population balance, etc.); Measurement and control of powder processes; Particle modification; Comminution; Powder handling and operations (storage, transport, granulation, separation, fluidization, etc.)