Journal article

Temperature responsive polymers as multiple function reagents in mineral processing

George V Franks, Haihong Li, John-Paul O'Shea, Greg G Qiao

ADVANCED POWDER TECHNOLOGY | ELSEVIER SCIENCE BV | Published : 2009

Abstract

A processing scheme which uses a single chemical that has multiple functions to achieve both efficient mineral flotation and solids dewatering is presented. Temperature sensitive polymers which display hydrophilic/hydrophobic transitions in response to changes in temperature such as poly (N-isopropyl acrylamide) (PNIPAM) have been found to be useful as such multiple function reagents. This polymer can cause the mineral particles' surfaces to be hydrophilic at temperature below the critical solution temperature (CST = 32 °C) and hydrophobic at temperature above the CST. Therefore, both particle surface wettability and inter-particle interaction forces are reversibly controllable. When the sur..

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