Selective flotation of siderite and quartz from a carbonate-containing refractory iron ore using a novel amino-acid-based collector
Xiaotian Gu 1  
,   Yimin Zhu 1, 2,   Yanjun Li 1, 3,   Yuexin Han 1, 3
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College of Resource and Civil Engineering, Northeastern University, Shenyang 110819, China
2011 Collaborative Innovation Centre of Steel Technology, Northeastern University, Shenyang 110819, China
Liaoning Technology and Engineering Laboratory of Effective Exploitation of Refractory Iron Ores, Shenyang 110819, China
Xiaotian Gu   

College of Resource and Civil Engineering, Northeastern University, Shenyang 110819, China, College of Resource and Civil Engineering, Northeastern University, 110819 Shenyang, China
Physicochem. Probl. Miner. Process. 2018;54(3):803–813
A novel and highly-efficient amino-acid-based collector, α-ethylenediamine lauric acid (α-EDA-LA), was studied to selectively beneficiate carbonate-containing refractory hematite ores. Single mineral and synthetic mixture flotation tests were carried out to investigate its floating performance. Zeta potential, fourier transform infrared spectroscopy (FTIR) and Density Functional Theory-based molecular simulation were used to identify the adsorption mechanism. The flotation results showed that quartz could be collected effectively at pH 11.0-12.0 in the reverse flotation. For siderite, the recovery peaked at 83.4% at pH 8.0, where siderite presented different floatability from magnetite and hematite. Exploiting such difference, the separation of siderite could be achieved. Zeta-potential measurements showed that α-EDA-LA adsorption on the surfaces of siderite and quartz decreased the corresponding zeta potentials at pH of 8.0-10.0 and 8.0-12.0, respectively. This means the adsorption overcome the electrostatic repulsion between α-EDA-LA and the mineral surfaces. The molecular simulation indicated that no chemisorption took place between α-EDA-LA and quartz. FTIR analysis suggested that α-EDA-LA was adsorbed on quartz via hydrogen bonding. The adsorption of α-EDA-LA on siderite surface was dominated by chemisorption, while further enhanced by hydrogen bonding. This study filled the gap in the research on siderite flotation reagents and its adsorption mechanism.
AHMED, I., JHUNG, S.H., 2017. Applications of metal-organic frameworks in adsorption / separation processes via hydrogen bonding interactions. Chem. Eng. J. 310, 197–215.
CHAIKINA, M.V., KRYUKOVA, G.N., 2004. Structural transformations in quartz and apatite on mechanical activation. J. Struct. Chem. 45, 121–126.
CHERNYSHOVA, I.V., RAO, K.H., VIDYADHAR, A., 2000. Mechanism of adsorption of long-chain alkylamines on silicates: A spectroscopic study. 1. Quartz. Langmuir 16, 8071–8084.
GAO, Y.S., GAO, Z.Y., SUN, W., HU, Y.H., 2016a. Selective flotation of scheelite from calcite: A novel reagent scheme, International Journal of Mineral Processing, 2016, 154,10-15.
GAO, Z.Y., GAO, Y.S., ZHU, Y.Y., HU, Y.H., SUN, W., 2016b. Selective flotation of calcite from fluorite: a novel reagent schedule, Minerals, 6 (4), 114.
GAO, Y.S., GAO, Z.Y., SUN, W., YIN, Z.G., WANG, J.J., HU Y.H.,2018. Adsorption of a novel reagent scheme on scheelite and calcite causing an effective flotation separation. J. Colloid Interface Sci. 512, 39-46.
GRAF, D.L., 1961. Crystallographic tables for the rhombohedral carbonates. Am. Mineral. 46, 1283-1316.
LEVIEN, L., PREVITT, C.T., WEIDNER, D.J., 1980. Structure and elstic properties of quartz at pressure. American Mineralogist 65, 920-930.
LI, C., GAO Z., 2017. Effect of grinding media on the surface property and flotation behavior of scheelite particles. Powder Technol. 322, 386-392.
LI, L.X., HAO, H.Q., YUAN, Z.T., LIU, J.T., 2017. Molecular dynamics simulation of siderite – hematite - quartz flotation. Applied Surface Sci. 419, 557–563.
MOHAMMADNEJAD, S., PROVIS, J.L., VAN DEVENTER, J.S.J., 2013. Effects of grinding on the preg-robbing potential of quartz in an acidic chloride medium. Miner. Eng. 52, 31-37.
MULLER-DETHLEFS, K., HOBZA, P., 2000. Noncovalent interactions: a challenge for experiment and theory. Chem. Rev. 100, 143–167.
PENG, W.S., LIU, G.K., KE, L.Q., 1985. Infrared spectra study of magnesite and siderite series. ACTA Mineralogica Sinica 5, 229-233.
SAHOO, H., RATH, S.S., DAS, B., MISHRA, B.K., 2016. Flotation of quartz using ionic liquid collectors with different functional groups and varying chain lengths. Miner. Eng. 95, 107–112.
SCHRAN, C., MARSALEK, O., MARKLAND, T.E., 2017. Unravelling the influence of quantum proton delocalization on electronic charge transfer through the hydrogen bond. Chem. Phys. Letters 678, 289-295.
SEO, J., HOFFMANN, W., MALERZ, S., WARNKE, S., BOWERS, M., PAGEL, J., HELDEN, G., 2017. Side-chain effects on the structures of protonated amino acid dimers: A gas-phase infrared spectroscopy study. Int. J. Mass Spectrom.,
SONG, B.Y., YUAN, L.B., WEI, S.M., 2015. Investigation on stepped flotation process for carbonate-containing hematite and production practice. Min. and Metall. Eng. 35, 63-67.
TIAN, M., GAO, Z., HAN, H., SUN, W., HU, Y., 2017. Improved flotation separation of cassiterite from calcite using a mixture of lead (II) ion / benzohydroxamic acid as collector and carboxymethyl cellulose as depressant. Miner. Eng. 113, 68-70.
TIAN, Y.A., SUN, B.Q., 2010. Experimental research on flotation separation of siderite and hematite. Met. Mine 406, 58-63.
VIDYADHAR, A., RAO, K.H., 2007. Adsorption mechanism of mixed cationic/anionic collectors in feldspar-quartz flotation system. J. Colloid Interface Sci. 306, 195–204.
VIDYADHAR, A., RAO, K.H., CHERNYSHOVA, I.V., 2003. Mechanisms of amine/feldspar interaction in the absence and presence of alcohols studied by spectroscopic methods. Colloid Surf. A: Physicochem. Eng. Asp. 214, 127–142.
VIDYADHAR, A., RAO, K.H., CHERNYSHOVA, I.V., PRADIP, FORSSBERG, K.S.E., 2002. Mechanisms of amine–quartz interaction in the absence and presence of alcohols studied by spectroscopic methods. J. Colloid Interface Sci. 256, 59–72.
VIEIRA, A.M., PERES, A.E.C., 2007. The effect of amine type, pH, and size range in the flotation of quartz. Miner. Eng. 20, 1008–1013.
WANG, D.H., LUO, X.M., YIN, W.Z., MA, Y.Q., 2016. Research on influence of siderite on flotation of hematite and its mechanism. Non-ferr. Met. – Miner. Process. Section 3, 59-62 & 71.
WENG, S.F., XU, Y.Z., 2016. Fourier transform infrared spectroscopy, third ed. Chem. Ind. Press, Beijing.
YANG, B., WU, X.Q., MI, X.X., 2010. Effect of α-starch in the Separation of Siderite and Hematite. Min. Metall. Eng. 30, 46-50.
YIN, W.Z., HAN, Y.X., XIE, F., 2010. Two-step flotation recovery of iron concentrate from Donganshan carbonaceous iron ore. J. Cent. South Univ. Technol. 17, 750-754.
ZHANG, Z.Y., LV, Z.F., YIN, W.Z., HAN, Y.X., 2008. Influence of the siderite in Donganshan iron ore on reverse flotation. Met. Mine 388, 52-55.
ZHU, Y.M., CHEN, J.X., REN, J.L., WANG, T.X., 2014. Stepped Flotation of Donganshan Mixed Iron Magnetic Concentrate at Normal Temperature Using a New Collector DTX-1. Met. Mine 457, 61-64.
ZHU, Y.M., LUO, B.B., SUN, C.Y., LIU, J., SUN, H.T., LI, Y.J., HAN, Y.X., 2016. Density functional theory study of a-Bromolauric acid adsorption on the α-quartz (101) surface. Miner. Eng. 92, 72-77.