Novel insights into sylvite flotation modulated by exposing facets

IF 4.5 2区工程技术 Q2 ENGINEERING, CHEMICAL Powder Technology Pub Date : 2024-06-04 DOI:10.1016/j.powtec.2024.119969

Yuan Yuan , Weiquan Zhan , Alejandro Lopéz Valdivieso , Songliang Ma , Yang Tian , Hao Yi , Guangfeng Dong , Shaoxian Song , Luis A. Cisternas , Feifei Jia

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Abstract

Sylvite (KCl) is a classical soluble mineral with high solubility, endowing the possibility to precisely adjust its surficial structure for flotation recovery. In this work, efforts have been originally made to study flotation behaviors of KCl with (200) and (222) exposing facets. KCl(200) crystals had a higher recovery than that of KCl(222) with octadecylamine hydrochloride (ODA). FTIR and XPS results indicated that interaction force between KCl and ODA was not chemical absorption. Zeta potential results further implied the mechanism that the ODA reacted with KCl by static force and KCl(200) possessed a lower potential than KCl(222) and thus facilitated the flotation process. 2D as well as 3D AFM results provided microscopic details of perfect cubic KCl(200) and octahedron KCl(222) samples where layered growing method of former samples exhibited more edges with hanging Cl bonds, leading to its more negative surficial potential and less hydrophilic property, enhancing flotation recovery. Moreover, adhesion & adsorption force further illustrated that KCl(200) obtained a stronger interaction with bubbles, in coincidence with its better flotation recovery. KCl crystals with (200) exposing faces promoted flotation in comparison with crystal with (222) faces, offering strategy to reserve (200) faces for designing KCl crystals with high recovery.

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通过暴露切面调控锡长石浮选的新见解

菱镁矿（KCl）是一种典型的可溶性矿物，具有很高的溶解度，因此可以精确地调整其表面结构以实现浮选回收。在这项工作中，最初是研究具有（200）和（222）暴露面的氯化钾的浮选行为。与含有十八胺盐酸盐（ODA）的 KCl(222) 相比，KCl(200) 晶体的回收率更高。傅立叶变换红外光谱和 XPS 结果表明，KCl 与 ODA 之间的作用力不是化学吸收。Zeta 电位结果进一步表明，ODA 与 KCl 的反应机制是静力作用，KCl(200) 的电位低于 KCl(222)，从而促进了浮选过程。二维和三维原子力显微镜结果提供了完美立方体 KCl(200) 和八面体 KCl(222) 样品的微观细节。此外，附着力&；吸附力进一步表明，KCl（200）与气泡的相互作用更强，这与其更好的浮选回收率相吻合。与具有（222）面的晶体相比，具有（200）暴露面的氯化钾晶体更有利于浮选，这为保留（200）面设计具有高回收率的氯化钾晶体提供了策略。

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来源期刊

Powder Technology 工程技术-工程：化工

CiteScore

9.90

自引率

15.40%

发文量

1047

审稿时长

46 days

期刊介绍： Powder Technology is an International Journal on the Science and Technology of Wet and Dry Particulate Systems. Powder Technology publishes papers on all aspects of the formation of particles and their characterisation and on the study of systems containing particulate solids. No limitation is imposed on the size of the particles, which may range from nanometre scale, as in pigments or aerosols, to that of mined or quarried materials. The following list of topics is not intended to be comprehensive, but rather to indicate typical subjects which fall within the scope of the journal's interests: Formation and synthesis of particles by precipitation and other methods. Modification of particles by agglomeration, coating, comminution and attrition. Characterisation of the size, shape, surface area, pore structure and strength of particles and agglomerates (including the origins and effects of inter particle forces). Packing, failure, flow and permeability of assemblies of particles. Particle-particle interactions and suspension rheology. Handling and processing operations such as slurry flow, fluidization, pneumatic conveying. Interactions between particles and their environment, including delivery of particulate products to the body. Applications of particle technology in production of pharmaceuticals, chemicals, foods, pigments, structural, and functional materials and in environmental and energy related matters. For materials-oriented contributions we are looking for articles revealing the effect of particle/powder characteristics (size, morphology and composition, in that order) on material performance or functionality and, ideally, comparison to any industrial standard.

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