Comparing the effect of salts and frother (MIBC) on gas dispersion and froth properties

被引：152
作者：
Quinn, J. J.
Kracht, W.
Gomez, C. O.
Gagnon, C.
Finch, J. A.
机构：
[1] McGill Univ, Dept Mining & Mat Engn, Montreal, PQ H3A 2B2, Canada
[2] COREM, Quebec City, PQ G1N 1X7, Canada
来源：
MINERALS ENGINEERING | 2007年 / 20卷 / 14期
基金：
加拿大自然科学与工程研究理事会;
关键词：
froth flotation; flotation frothers; flotation bubbles; flotation froths;
D O I：
10.1016/j.mineng.2007.07.007
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
The Raglan concentrator (Xstrata Nickel) does not employ frother. It was considered this might be the result of the high salt content in the process water (ca. 30000 ppm). Two-phase (solution-air) and three-phase (slurry-air) tests were undertaken in a laboratory column to quantify the effect of inorganic ions present in the water (a range of polyvalent ions). The measurements focused on gas dispersion (bubble size and gas holdup) and froth overflow rate. The results were compared to a typical frother (MIBC) system. The two-phase tests revealed reduced bubble size, increased gas holdup and limited froth formation in salt solutions. The gas holdup correlated with ionic streneth. At an ionic strength ca. 0.4 (-0.4 M NaCl) the increase in gas holdup was comparable to ca.10 ppin MIBC. In three-phase tests on a sulphide ore, bubble size and froth overflow rate were again comparable between 0.4 M NaCl and 10 ppm MIBC. The observations help explain why the Raglan plant can operate without frother addition. (c) 2007 Elsevier Ltd. All rights reserved.
引用
收藏
页码：1296 / 1302
页数：7
相关论文
共 24 条
[1]  
[Anonymous], P 6 CAN MIN PROC
[2]  
CAPPUCCITTI F, 2007, P 39 ANN M CAN MIN P, P399
[3]   THE EFFECT OF ELECTROLYTES ON BUBBLE COALESCENCE IN WATER [J].
CRAIG, VSJ ;
NINHAM, BW ;
PASHLEY, RM .
JOURNAL OF PHYSICAL CHEMISTRY, 1993, 97 (39) :10192-10197
[4]   Bubble coalescence and specific-ion effects [J].
Craig, VSJ .
CURRENT OPINION IN COLLOID & INTERFACE SCIENCE, 2004, 9 (1-2) :178-184
[5]  
Finch J.A., 1990, COLUMN FLOTATION
[6]   Experimental evidence in support of the balanced-layer theory of liquid film formation [J].
Foulk, CW ;
Miller, JN .
INDUSTRIAL AND ENGINEERING CHEMISTRY, 1931, 23 :1283-1288
[7]  
GELINAS S, 2005, P 37 ANN M CAN MIN P, P569
[8]  
GEORGE C, 1996, NICKEL AUSTRALASIAN, P9
[9]  
HARRIS PJ, 1982, S AFRICAN I MINING M, V3, P237
[10]  
Hernandez J., 2002, P 34 ANN M CAN MIN P
123