Enhanced flocculation and dewatering of clay mineral dispersions

被引：67

作者：

Addai-Mensah, Jonas ^{[1
]}

机构：

[1] Univ S Australia, Ian Wark Res Inst, Australian Res Council, Special Res Ctr, Adelaide, SA 5095, Australia

来源：

POWDER TECHNOLOGY | 2007年 / 179卷 / 1-2期

基金：

澳大利亚研究理事会;

关键词：

dewatering; clay mineral dispersions; particle interactions; rheology; pulp consolidation;

D O I：

10.1016/j.powtec.2006.11.008

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Results emerging from the several studies recently performed to provide fundamental understanding of the interplay between mineral pulp chemistry, flocculation performance, particle interactions, role of applied shear and dewaterability of model colloidal kaolinite and smectite dispersions are presented and discussed. Beneficial links between pulp interfacial chemistry (particle zeta potential), particle interactions (shear yield stress) and beneficial dewatering behaviour (batch settling rate and sediment solid loading), established through the influence of hydrolyzable metal ions, pH, temperature, high molecular weight polymer structure type (anionic polyacrylamide vs non-ionic polyethylene oxide) and shear, are shown. The application of the findings and new knowledge gained for a marked improvement in clay pulp dewaterability is discussed. (C) 2006 Elsevier B.V. All rights reserved.

引用

页码：73 / 78

页数：6

共 21 条

[1]

ADDAIMENSAH J, 2006, 6 UBC P MCGILL C MON

[2] Studies on flocculation and dewatering of kaolin suspensions by anionic polyacrylamide flocculant in the presence of some surfactants [J].