Influence of bentonite on flotation of minerals with different densities

IF 5.3 2区地球科学 Q2 CHEMISTRY, PHYSICAL

Applied Clay Science Pub Date : 2025-03-10 DOI:10.1016/j.clay.2025.107778

Nadia Kashif, Boris Albijanic, Jing Jing Xu, Teresa McGrath, Muhammad Kashif Nazir, Michael Hitch, Bogale Tadesse

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Abstract

This short communication investigates the impact of bentonite on the flotation performance of minerals with varying densities, specifically galena and sphalerite. Despite existing research on bentonite influence on flotation, its effects on minerals with different densities have not been analyzed so far. The results from this study demonstrated that bentonite adversely affected the flotation recoveries of both galena and sphalerite due to the high pulp viscosity. The addition of Ca²⁺ ions mitigated this detrimental effect by reducing the pulp viscosities around 8 times. As a result, the flotation performance of galena was markedly enhanced, showing a 33 % increase in recovery and a 37 % improvement in settling rates. However, in the absence of Ca²⁺ ions, the flotation recovery of galena decreased more than that of sphalerite, considering that the density of galena is 1.9 times higher than that of sphalerite. This study shows that in the presence of Ca²⁺ ions, the flotation recoveries of galena and sphalerite became similar, as Ca²⁺ reduced the consistency index and prevented galena particles from detaching from bubbles.

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来源期刊

Applied Clay Science 地学-矿物学

CiteScore

10.30

自引率

10.70%

发文量

289

审稿时长

39 days

期刊介绍： Applied Clay Science aims to be an international journal attracting high quality scientific papers on clays and clay minerals, including research papers, reviews, and technical notes. The journal covers typical subjects of Fundamental and Applied Clay Science such as: • Synthesis and purification • Structural, crystallographic and mineralogical properties of clays and clay minerals • Thermal properties of clays and clay minerals • Physico-chemical properties including i) surface and interface properties; ii) thermodynamic properties; iii) mechanical properties • Interaction with water, with polar and apolar molecules • Colloidal properties and rheology • Adsorption, Intercalation, Ionic exchange • Genesis and deposits of clay minerals • Geology and geochemistry of clays • Modification of clays and clay minerals properties by thermal and physical treatments • Modification by chemical treatments with organic and inorganic molecules(organoclays, pillared clays) • Modification by biological microorganisms. etc...