Effect of sodium hexametaphosphate on the flotation separation of lepidolite and quartz: MD study

• Autorzy: Yang Siqi , Luo Xianping , Zhou Hepeng , Tang Xuekun , Liu Zishuai , Guo Jiangfeng , Shen Louyan

Identyfikatory

DOI

10.37190/ppmp/192882

• Języki publikacji: EN

Abstrakty

EN

The present study employed sodium hexametaphosphate (SHMP) as a depressant for quartz to achieve selective flotation separation of lepidolite. Micro-flotation and artificial mixed-mineral tests confirmed that the introduction of SHMP successfully facilitated the separation of lepidolite and quartz under weak acid conditions. The MD simulations revealed that hydroxylation of non-bridging oxygen atoms on the quartz surface influenced the adsorption of dodecylamine (DDA), while it had no impact on the adsorption of sodium hexametaphosphate (SHMP). Additionally, SHMP was found to form hydrogen bonds with hydroxyl groups present on the quartz surface, thereby enhancing its adsorption capacity and indirectly promoting a higher degree of surface hydroxylation to impede DDA adsorption, thus preserving the hydrophilic nature of the quartz surface. Conversely, the dissolution of K⁺ in the [Si_6-nAlnO₆] (n=0, 1, 2) rings on the lepidolite surface in an aqueous environment leads to a negative charge on lepidolite. This negatively charged state presents obstacles for SHMP adsorption onto the lepidolite surface; however, it facilitates strong attraction and firm adsorption of positively charged DDA within the ring cavities of lepidolite, resembling an "anchor". The adsorption test revealed that, following treatment with SHMP, a substantial amount of DDA remained adsorbed onto the lepidolite, while only a negligible quantity was observed on the quartz surface. Consequently, the introduction of SHMP enables effective inhibition of quartz under conditions characterized by low hydroxylation levels on its surface (weak acid or neutral), thereby facilitating the production of high-quality lepidolite products.

Słowa kluczowe

EN

lepidolite; quartz; hydroxylation; Molecular Dynamics; adsorption difference

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Physicochemical Problems of Mineral Processing
• Rocznik: 2024
• Tom: Vol. 60, iss. 5
• Strony: art. no. 192882
• Opis fizyczny: Bibliogr. 33 poz., rys., tab., wykr.

Twórcy

autor

Yang Siqi

• Jiangxi Province Key Laboratory of Efficient Development and Utilization of Rare Metal Resources, Jiangxi University of Science and Technology, Ganzhou 341000, China
• Jiangxi Provincial Key Laboratory of Low-Carbon Processing and Utilization of Strategic Metal Mineral Resources, Jiangxi University of Science and Technology, Ganzhou 341000, China
• Faculty of Resource and Environmental Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China

autor

Luo Xianping

• Jiangxi Province Key Laboratory of Efficient Development and Utilization of Rare Metal Resources, Jiangxi University of Science and Technology, Ganzhou 341000, China
• Jiangxi Provincial Key Laboratory of Low-Carbon Processing and Utilization of Strategic Metal Mineral Resources, Jiangxi University of Science and Technology, Ganzhou 341000, China
• Faculty of Resource and Environmental Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China
• Yichun Lithium New Energy Industry Research Institute, Jiangxi University of Science and Technology, Yichun 336000, China

autor

Zhou Hepeng

• Jiangxi Province Key Laboratory of Efficient Development and Utilization of Rare Metal Resources, Jiangxi University of Science and Technology, Ganzhou 341000, China
• Jiangxi Provincial Key Laboratory of Low-Carbon Processing and Utilization of Strategic Metal Mineral Resources, Jiangxi University of Science and Technology, Ganzhou 341000, China
• Faculty of Resource and Environmental Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China
• Yichun Lithium New Energy Industry Research Institute, Jiangxi University of Science and Technology, Yichun 336000, China

autor

Tang Xuekun

• Jiangxi Province Key Laboratory of Efficient Development and Utilization of Rare Metal Resources, Jiangxi University of Science and Technology, Ganzhou 341000, China
• Jiangxi Provincial Key Laboratory of Low-Carbon Processing and Utilization of Strategic Metal Mineral Resources, Jiangxi University of Science and Technology, Ganzhou 341000, China
• Faculty of Resource and Environmental Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China
• Yichun Lithium New Energy Industry Research Institute, Jiangxi University of Science and Technology, Yichun 336000, China

autor

Liu Zishuai

• Jiangxi Province Key Laboratory of Efficient Development and Utilization of Rare Metal Resources, Jiangxi University of Science and Technology, Ganzhou 341000, China
• Jiangxi Provincial Key Laboratory of Low-Carbon Processing and Utilization of Strategic Metal Mineral Resources, Jiangxi University of Science and Technology, Ganzhou 341000, China
• Faculty of Resource and Environmental Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China
• Yichun Lithium New Energy Industry Research Institute, Jiangxi University of Science and Technology, Yichun 336000, China

autor

Guo Jiangfeng

• Jiangxi Province Key Laboratory of Efficient Development and Utilization of Rare Metal Resources, Jiangxi University of Science and Technology, Ganzhou 341000, China
• Jiangxi Provincial Key Laboratory of Low-Carbon Processing and Utilization of Strategic Metal Mineral Resources, Jiangxi University of Science and Technology, Ganzhou 341000, China
• Faculty of Resource and Environmental Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China

autor

Shen Louyan

• China Nerin Engineering Co., Ltd., China

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa nr POPUL/SP/0154/2024/02 w ramach programu "Społeczna odpowiedzialność nauki II" - moduł: Popularyzacja nauki (2025).