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- W2789184730 abstract "Abstract Carboxymethyl cellulose (CMC), a negatively charged polymer, is commonly used as a depressant of talc. However, the separation of pyrite and talc can be deteriorated by the presence of calcium ions, which can facilitate the absorption of CMC onto both talc surfaces and pyrite. In this work, carbonate ions were introduced to solve this problem, and the effects of calcium and carbonate ions on the adsorption of CMC were also studied. Micro-flotation results revealed that CO 3 2 - . not only eliminated the inhibition of pyrite by Ca2+ and CMC, but also had no influence on the depression of talc at pH 6–10. The surface-specific study confirmed that the adsorption of Ca2+ onto talc basal planes at pH 8.5 was negligible and could be improved by the presence of CO 3 2 - . . The atomic force microscopy analysis showed the correlation between the coverage of CMC onto talc surfaces in the presence and absence of CO 3 2 - . . A mechanism for the adsorption of CMC onto talc surfaces was proposed based on the morphological differences in the presence and absence of CO 3 2 - ." @default.
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- W2789184730 date "2018-04-01" @default.
- W2789184730 modified "2023-09-27" @default.
- W2789184730 title "The role of calcium and carbonate ions in the separation of pyrite and talc" @default.
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- W2789184730 doi "https://doi.org/10.1016/j.mineng.2018.01.016" @default.
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