Dynamic froth stability in froth flotation

被引：113

作者：

Barbian, N ^{[1
]}

Ventura-Medina, E ^{[1
]}

Cilliers, JJ ^{[1
]}

机构：

[1] UMIST, Froth & Foam Res Grp, Dept Chem Engn, Manchester M60 1QD, Lancs, England

来源：

MINERALS ENGINEERING | 2003年 / 16卷 / 11期

关键词：

froth flotation; flotation bubbles; flotation froths; process instrumentation;

D O I：

10.1016/j.mineng.2003.06.010

中图分类号：

TQ [化学工业];

学科分类号：

0817 [化学工程与技术];

摘要：

A new measure for froth stability is introduced in this work, based on a dynamic stability test for non-overflowing froth columns. The dynamic stability factor represents the lifetime of a bubble in the froth, and is defined as the ratio of the total volume of froth at equilibrium to the volumetric gas rate introduced into the system. Experiments have been carried out at laboratory scale to measure the dynamic stability factor under different operating conditions. Air flowrate and frother concentration were the key operating variables. It was found that the equilibrium height and the dynamic stability factor depend significantly upon both the air flowrate and the frother concentration. Also, the dynamic stability factor and the fraction of air overflowing as unbroken bubbles in batch flotation tests were related and can be used to establish a stability criteria. These measurements will also allow a clearer quantitative link to be formed between froth stability with froth structure and flotation performance. (C) 2003 Elsevier Ltd. All rights reserved.

引用

页码：1111 / 1116

页数：6

共 16 条

[1]

ASPECTS OF AQUEOUS FOAM STABILITY IN THE PRESENCE OF HYDROCARBON OILS AND SOLID PARTICLES [J].

AVEYARD, R ;

BINKS, BP ;

FLETCHER, PDI ;

PECK, TG ;

RUTHERFORD, CE .

ADVANCES IN COLLOID AND INTERFACE SCIENCE, 1994, 48 :93-120

[2]

Role of surfactant structure on surface and foaming properties [J].

Beneventi, D ;

Carre, B ;

Gandini, A .

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS, 2001, 189 (1-3) :65-73

[3]

BIKERMAN JJ, 1973, APPL PHYSICS ENG, V10

[4]

Effect of flotation frothers on bubble size and foam stability [J].

Cho, YS ;

Laskowski, JS .

INTERNATIONAL JOURNAL OF MINERAL PROCESSING, 2002, 64 (2-3) :69-80

[5]

DEJAGER G, 2003, EXTRACTION VALUABLE

[6]

Foam measurements in wines:: Comparison of parameters obtained by gas sparging method [J].

Gallart, M ;

López-Tamames, E ;

Buxaderas, S .

JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY, 1997, 45 (12) :4687-4690

[7]

Measurements of selectivity due to coalescence between two mineralized bubbles and characterization of MIBC action on froth flotation [J].

GourramBadri, F ;

Conil, P ;

Morizot, G .

INTERNATIONAL JOURNAL OF MINERAL PROCESSING, 1997, 51 (1-4) :197-208

[8]

A NEW METHOD TO ESTIMATE THE STABILITY OF SHORT-LIFE FOAMS [J].

IGLESIAS, E ;

ANDEREZ, J ;

FORGIARINI, A ;

SALAGER, JL .

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS, 1995, 98 (1-2) :167-174

[9]

THE INFLUENCE OF PARTICLE-SIZE AND HYDROPHOBICITY ON THE STABILITY OF MINERALIZED FROTHS [J].

JOHANSSON, G ;

PUGH, RJ .

INTERNATIONAL JOURNAL OF MINERAL PROCESSING, 1992, 34 (1-2) :1-21

[10]

SURFACE ELASTICITY AND FROTHABILITY OF N-OCTANOL AND N-OCTANOIC ACID-SOLUTIONS [J].

MALYSA, K ;

LUNKENHEIMER, K ;

MILLER, R ;

HARTENSTEIN, C .

COLLOIDS AND SURFACES, 1981, 3 (04) :329-338

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