Journal
MINERALS ENGINEERING
Volume 127, Issue -, Pages 185-190Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.mineng.2018.08.022
Keywords
Malachite flotation; Sodium oleate; Alcohols; Co-adsorption
Funding
- Consejo Nacional de Ciencia y Tecnologia (CONACyT) of Mexico [270186]
- Natural Science Foundation of Hubei Province of China [2016CFA013]
- Wuhan Science and Technology Bureau of China [2016070204020156]
- CONACyT [717627]
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The sodium oleate collector used in malachite flotation usually exhibits low selectivity. By partially replacing sodium oleate with alcohols, this study presents a method for increasing the selectivity of sodium oleate-based collectors in malachite flotation. By combining 3 x 10(-5) mol/L alcohols, such as 1-octanol, 2-ethylhexanol, and alpha-terpineol, with 1 x 10(-5) mol/L sodium oleate, malachite floatability values higher than 98% are achieved. Contact angle and zeta potential measurements reveal that the co-adsorption of alcohols with sodium oleate may be resulted from the hydrophobic interactions between their hydrocarbon chains. The co-adsorption of methyl isobutyl carbinol, along with its shorter hydrocarbon chain, makes it more difficult to render the malachite surface highly hydrophobic. However, the co-adsorption of straight-chain and branched-chain alcohols with sodium oleate shows the ability consistently to induce high malachite floatability.
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