Abstract
Methods to determine frother functions, control of bubble size and froth properties, are now widely used. Some collectors also exhibit frother functions which are less understood. Using a water-air system in a mini-mechanical flotation cell setup, this paper determines bubble size and water overflow rate for three amine collectors: one primary amine (dodecylamine, DDA) and two commercial ether amines (Flotigam® EDA and Flotigam® 2835-2L) and their combination with two common frothers, MIBC (methyl isobutyl carbinol) and PPG 425 (polypropylene glycol, molecule weight 425). Compared to the frothers, the amines were less effective in reducing bubble size, giving larger minimum size and the two commercial amines showed evidence of coalescence at low concentration. In blends, at fixed frother dosage, frother eliminated the coalescence but as amine concentration increased the amines dominated bubble size. Water overflow was a strong function of reagent type. For fixed 1-cm froth depth, PPG 425, Flotigam® 2835-2L and to a lesser extent DDA produced overflow while MIBC and Flotigam® EDA did not. In blends with frother overflow increased except with Flotigam® EDA. Mechanisms are briefly explored. The principal benefit of blending identified is the elimination of coalescence if residual concentration of the two commercial amines is below ca. 10 ppm.
Similar content being viewed by others
References
Wills BA, Finch JA (2016) Wills’ mineral processing technology: an introduction to the practical aspects of ore treatment and mineral recovery, 8th edn. Elsevier, Amsterdam
Laskowski JS (2003) Fundamental properties of flotation frothers. In: Lorenzen L and Bradshaw DJ (Eds.) Proceedings of the 22nd international mineral processing congress (IMPC.) Vol 2. SAIMM, Cape Town, South Africa pp 788–797
Cappuccitti F, Finch JA (2008) Development of new frothers through hydrodynamic characterization. Miner Eng 21(12–14):944–948
Ravichandran V, Eswaraiah C, Sakthivel R, Biswal SK, Manisankar P (2013) Gas dispersion characteristics of flotation reagents. Powder Technol 235:329–335
Zhou X, Jordens A, Cappuccitti F, Finch JA, Waters KE (2016) Gas dispersion properties of collector/frother blends. Miner Eng 96–97:20–25
Atrafi A, Gomez CO, Finch JA, Pawlik M (2012) Frothing behavior of aqueous solutions of oleic acid. Miner Eng 36–38:138–144
Corona-Arroyo MA, López-Valdivieso A, Laskowski JS, Encinas-Oropesa A (2015) Effect of frothers and dodecylamine on bubble size and gas holdup in a downflow column. Miner Eng 81:109–115
Espinosa-Gomez R, Finch JA, Bernert W (1988) Coalescence and froth collapse in the presence of fatty acids. Colloids Surf 32:197–209
El-Shall H, Abdel-Khalek NA, Svoronos S (2000) Collector-frother interaction in column flotation of Florida phosphate. Int J Miner Process 58(1–4):187–199
Nagaraj DR, Ravishanka SA (2007) Flotation reagents—a critical overview from an industry perspective. In: Fuerstenau MC et al (eds) Froth Flotation: A Century of Innovation. SME, Littleton, pp 375–423
Araujo AC, Viana PRM, Peres AEC (2005) Reagents in iron ores flotation. Miner Eng 18(2):219–224
Papini RM, Brandao PRG, Peres AEC (2001) Catioinic flotation of iron ores: amine characterization and performance. Minerals & Metall Process 18(1):5–9
Nunes APL, Pinto CLL, Valadão GES, de Magalhães Viana PR (2012) Floatability studies of wavellite and preliminary results on phosphorus removal from a Brazilian iron ore by froth flotation. Miner Eng 39:206–212
Shink D, Rosenblum R, Kim JY, Stowe KG (1992) Development of small scale flotation cells and its application in milling operations. In: Proceedings of 24th Annual Meeting of Canadian Mineral Processors. CIM, Ottawa, Canada. Paper 13
Zhang W, Nesset JE, Finch JA (2010) Water recovery and bubble surface area flux in flotation. Can Metall Q 49(4):353–362
Somasundaran P, Wang D (2006) The Ka values of comemonly used anionic flotagents (Tables A1.1–A1.5). In: Wills BA (ed) Solution chemistry: minerals and reagents, developments in mineral processing series, vol 17. Elsevier, Amsterdam
Vieira AM, Peres AEC (2007) The effect of amine type, pH and size range in the flotation of quartz. Miner Eng 20:1008–1013
Azgomi F, Gomez CO, Finch JA (2009) Frother persistence: a measure using gas holdup. Miner Eng 22(9–10):874–878
Gomez CO, Finch JA (2007) Gas dispersion measurements in flotation cells. Int J Miner Process 84(1–4):51–58
Laskowski JS, Tlhone T, Williams P, Ding K (2003) Fundamental properties of the polyoxypropylene alkyl ether flotation frothers. Int J Miner Process 72(1–4):289–299
Grau RA, Laskowski JS, Heiskenan K (2005) Effect of frothers on bubble size. Int J Miner Process 76:225–233
Zhang W, Nesset JE, Rao R, Finch JA (2012) Characterizing frothers though critical coalescence–hydrophile/lipophile balance relationship. Minerals 2:208–227
Robinson JV, Woods WWJ (1948) A method of selecting foam inhibitors. J Chem Technol Biotechnol 67:361–365
Ross S (1950) Inhibition of foaming II: a mechanism for the rupture of liquid films by antifoaming agents. J Phys Chem 54(3):429–436
Chu P, Waters KE, Finch JA (2016) Break-up in formation of small bubbles: an energy consideration. Can Metall Q 56(1):30–34
Maréchal Y (2007) The hydrogen bond: formation, thermodynamic properties, classification. In: The hydrogen bond and the water molecule. Elsevier, Amsterdam, pp 3–24
Ouellette RJ, Rawn JD (2014) Organic chemistry: structure, mechanism, and synthesis. Elsevier, Boston
Gupta VP (2016) Topological analysis of electron density—quantum theory of atoms in molecules. In: Principles and applications of quantum chemistry. Academic Press, Boston, pp 359–384
Hunter TN, Pugh RJ, Franks GV, Jameson GJ (2008) The role of particles in stabilizing foams and emulsions. Adv Colloid Interf Sci 137(2):57–81
Zhang W, Finch JA (2014) Effect of solids on pulp and froth properties in flotation. J Cent South Univ 21(4):1461–1469
Tsatouhas G, Grano SR, Vera M (2006) Case studies on the performance and characterisation of the froth phase in industrial flotation circuits. Miner Eng 19(6–8):774–783
Acknowledgements
The work was conducted under the Chair in Mineral Processing funded through the NSERC (Natural Sciences and Engineering Research Council of Canada) CRD (Collaborative Research and Development) program sponsored by Vale, Teck, Xstrata Process Support, Barrick Gold, Shell Canada, Corem, SGS Lakefield Research and Flottec. Provision of the ether amine samples and discussions with Vale personnel are gratefully acknowledged.
Author information
Authors and Affiliations
Corresponding author
Ethics declarations
Conflict of Interest
On behalf of all authors, the corresponding author states that there is no conflict of interest.
Additional information
Publisher’s Note Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.
Rights and permissions
About this article
Cite this article
Zhou, X., Tan, Y.H. & Finch, J.A. Frothing Properties of Amine/Frother Combinations. Mining, Metallurgy & Exploration 36, 81–88 (2019). https://doi.org/10.1007/s42461-018-0034-6
Received:
Revised:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s42461-018-0034-6