Mineral-mineral particle collisions during flotation remove adsorbed nanoparticle flotation collectors

被引：31

作者：

Dong, Xiaofei ^{[1
]}

Price, Marie ^{[1
]}

Dai, Zongfu ^{[2
]}

Xu, Manqiu ^{[2
]}

Pelton, Robert ^{[1
]}

机构：

[1] McMaster Univ, Dept Chem Engn, 1280 Main St West, Hamilton, ON L8S 4L7, Canada

[2] Vale Base Met Technol Dev, 2060 Flavelle Blvd, Mississauga, ON L5K 1Z9, Canada

来源：

JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2017年 / 504卷

基金：

加拿大自然科学与工程研究理事会;

关键词：

Flotation; Latex; Flotation collectors; Conditioning time; Adhesion; Abrasion; NICKEL ORE; COAL; PERFORMANCE; MECHANISMS;

D O I：

10.1016/j.jcis.2017.05.050

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Flotation of 43 mu m diameter, hydrophilic glass beads with hydrophobic cationic polystyrene nanoparticle flotation collectors revealed that bead-bead collisions during conditioning and flotation caused the irreversible abrasion of the adsorbed nanoparticles. The abraded particles were present in the suspension as large aggregates. Nanoparticle abrasion explains why small polystyrene particles are more effective than larger ones, and why, much higher dosages of larger nanoparticles are required for the same flotation performance. These behaviors also were demonstrated with a phenomenological model of the abrasion dynamics. (C) 2017 Elsevier Inc. All rights reserved.

引用

页码：178 / 185

页数：8

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