Investigation on alternative depressants for iron ore flotation |
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| Authors: | HDG Turrer AEC Peres |
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| Affiliation: | 1. Samarco Mineração S. A. Ponta Ubu, 29230-000 Anchieta, ES, Brazil;2. Universidade Federal de Minas Gerais Escola de Engenharia, Avenida Antonio Carlos, 6627, 31270-901 Belo Horizonte, MG, Brazil;1. JKMRC, Australia;2. University of Cape Town, South Africa;1. School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China;2. School of Metallurgy and Environment, Central South University, Changsha 410083, China;1. College of Resource and Civil Engineering, Northeastern University, Shenyang 110819, PR China;2. National-local Joint Engineering Research Center of High-efficient Exploitation Technology for Refractory Iron Ore Resources, Shenyang 110819, PR China |
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| Abstract: | Iron ore concentration through flotation represents an important application of reagents in mineral processing. Nowadays all Brazilian iron ore concentrators use starch as iron oxides depressant. This study evaluated the application of other depressants, which are commonly used in other flotation systems. Six carboxymethylcelluloses, three lignosulphonates, one guar gum, and four humic acids samples were investigated in the reverse cationic flotation. Laboratory flotation tests showed that only two polymers (one carboxymethylcellulose and guar gum) reached the same performance as starch. The superior performance of these reagents was due to the presence of the glucopyranose ring. The use of polymers blends led to promising results. |
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