Effect of Mechanical Activation on Leachability of Fayalite in Sulfuric Acid Solution

Author(s): Rashid Nadirov*, Lyazzat Mussapyrova

Journal Name: Current Physical Chemistry

Volume 10 , Issue 2 , 2020


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Graphical Abstract:


Abstract:

Background: Being by-products of non-ferrous metallurgy, slags contain fayalite (Fe2SiO4) as the major component. Since hydrometallurgical methods are considered as the most promising for processing such material to obtain valuable metals, increasing the leachability of fayalite in sulfuric acid as a widely used leaching agent is an important task.

Objective: The present work was devoted to increasing the reactivity of fayalite by using mechanical activation.

Method: Fayalite, synthesized with the use of powders of metallic Fe, Fe2O3, and SiO2, was subjected to mechanical activation in the planetary ball mill at 400 rpm with a ball/powder ratio of 5 for 45 minutes. Then, activated and non-activated fayalite samples were subjected to sulfuric acid leaching. Before leaching, solid samples were characterized by XRD and Dynamic Light Scattering (DLS). Quantitative analysis of Fe and Si in the leachate was determined by Inductively Coupled Plasma-Atomic Emission Spectroscopy.

Results: Mechanical activation led to partial amorphization of the initial fayalite sample. It was found that the leaching rate constants of the treated samples in sulfuric acid solution (50-80 g×L-1) at 298, 338, and 368 K increased and the activation energy of the leaching process decreased, i.e. mechanical activation enhances the reactivity of fayalite in H2SO4 solution.

Conclusion: Mechanical activation can be applied to improve fayalite leachability in sulfuric acid solution. The results obtained can be used in the development of methods for leaching slag of non-ferrous metallurgy, in particular, copper smelter slags, the major component of which is fayalite.

Keywords: Fayalite, hydrometallurgical methods, mechanical activation, metallurgy, slag, sulfuric acid leaching.

[1]
Piatak, N.M.; Parsons, M.B.; Seal, R.R. Characteristics and environmental aspects of slag: A review. Appl. Geochem., 2015, 57, 236-266.
[http://dx.doi.org/10.1016/j.apgeochem.2014.04.009]
[2]
Potysz, A.; van Hullebusch, E.D.; Kierczak, J.; Grybos, M.; Lens, P.N.; Guibaud, G. Copper metallurgical slags–current knowledge and fate: A review. Crit. Rev. Environ. Sci. Technol., 2015, 45(22), 2424-2488.
[http://dx.doi.org/10.1080/10643389.2015.1046769]
[3]
Gorai, B.; Jana, R.K. Characteristics and utilisation of copper slag- A review. Resour. Conserv. Recycling, 2003, 39(4), 299-313.
[http://dx.doi.org/10.1016/S0921-3449(02)00171-4]
[4]
Panda, S.; Mishra, S.; Rao, D.S.; Pradhan, N.; Mohapatra, U.; Angadi, S.; Mishra, B.K. Extraction of copper from copper slag: Mineralogical insights, physical beneficiation and bioleaching studies. Korean J. Chem. Eng., 2015, 32(4), 667-676.
[http://dx.doi.org/10.1007/s11814-014-0298-6]
[5]
Banza, A.N.; Gock, E.; Kongolo, K. Base metals recovery from copper smelter slag by oxidising leaching and solvent extraction. Hydrometallurgy, 2002, 67(1), 63-69.
[http://dx.doi.org/10.1016/S0304-386X(02)00138-X]
[6]
Meshram, P.; Bhagat, L.; Prakash, U.; Pandey, B.D. Abhilash. Organic acid leaching of base metals from copper granulated slag and evaluation of mechanism. Can. Metall. Q., 2017, 56(2), 168-178.
[7]
Ahmed, I.M.; Nayl, A.A.; Daoud, J.A. Leaching and recovery of zinc and copper from brass slag by sulfuric acid. J. Saudi Chem. Soc., 2016, 20, 280-285.
[http://dx.doi.org/10.1016/j.jscs.2012.11.003]
[8]
Altundogan, H.S.; Boyrazli, M.; Tumen, F. A study on the sulphuric acid leaching of copper converter slag in the presence of dichromate. Miner. Eng., 2004, 17(3), 465-467.
[http://dx.doi.org/10.1016/j.mineng.2003.11.002]
[9]
Nadirov, R.K.; Syzdykova, L.I.; Zhussupova, A.K.; Usserbaev, M.T. Recovery of value metals from copper smelter slag by ammonium chloride treatment. Int. J. Miner. Process., 2013, 124, 145-149.
[http://dx.doi.org/10.1016/j.minpro.2013.07.009]
[10]
Nadirov, R.; Syzdykova, L.; Zhussupova, A. Copper smelter slag treatment by ammonia solution: Leaching process optimization. J. Cent. South Univ., 2017, 24(12), 2799-2804.
[http://dx.doi.org/10.1007/s11771-017-3694-3]
[11]
Nadirov, R.K. Recovery of valuable metals from copper smelter slag by sulfation roasting. Trans. Indian Inst. Met., 2019, 72(3), 603-607.
[http://dx.doi.org/10.1007/s12666-018-1507-5]
[12]
Yang, Z.; Rui-lin, M.; Wang-dong, N.; Hui, W. Selective leaching of base metals from copper smelter slag. Hydrometallurgy, 2010, 103(1-4), 25-29.
[http://dx.doi.org/10.1016/j.hydromet.2010.02.009]
[13]
Van Herk, J.; Pietersen, H.S.; Schuiling, R.D. Neutralization of industrial waste acids with olivine-The dissolution of forsteritic olivine at 40-70°C. Chem. Geol., 1989, 76(3-4), 341-352.
[http://dx.doi.org/10.1016/0009-2541(89)90102-2]
[14]
Terry, B. Specific chemical rate constants for the acid dissolution of oxides and silicates. Hydrometallurgy, 1983, 11(3), 315-344.
[http://dx.doi.org/10.1016/0304-386X(83)90051-8]
[15]
Baláž, P.; Turianicová, E.; Fabián, M.; Kleiv, R.A.; Briančin, J.; Obut, A. Structural changes in olivine (Mg, Fe)2SiO4 mechanically activated in high-energy mills. Int. J. Miner. Process., 2008, 88(1-2), 1-6.
[http://dx.doi.org/10.1016/j.minpro.2008.04.001]
[16]
Safari, V.; Arzpeyma, G.; Rashchi, F.; Mostoufi, N. A shrinking particle-shrinking core model for leaching of a zinc ore containing silica. Int. J. Miner. Process., 2009, 93(1), 79-83.
[http://dx.doi.org/10.1016/j.minpro.2009.06.003]
[17]
Perederiy, I.; Papangelakis, V.G. Why amorphous FeO-SiO2 slags do not acid-leach at high temperatures. J. Hazard. Mater., 2017, 321, 737-744.
[http://dx.doi.org/10.1016/j.jhazmat.2016.09.055 PMID: 27744239]
[18]
Cailleteau, C.; Weigel, C.; Ledieu, A.; Barboux, P.; Devreux, F. On the effect of glass composition in the dissolution of glasses by water. J. Non-Crystall. Sol., 2008, 354(2-9), 117-123..
[http://dx.doi.org/10.1016/j.jnoncrysol.2007.07.063]
[19]
Casey, W.H.; Westrich, H.R.; Arnold, G.W. The surface chemistry of dissolving labradorite feldspar. Geochim. Cosmochim. Acta, 1989, 53(4), 821-832.
[http://dx.doi.org/10.1016/0016-7037(89)90028-8]
[20]
Ledieu, A.; Devreux, F.; Barboux, P.; Sicard, L.; Spalla, O. Leaching of borosilicate glasses. I. Experiments. J. Non-Cryst. Solids, 2004, 343(1-3), 3-12.
[http://dx.doi.org/10.1016/j.jnoncrysol.2004.06.006]


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Article Details

VOLUME: 10
ISSUE: 2
Year: 2020
Page: [82 - 87]
Pages: 6
DOI: 10.2174/1877946810666200128152729

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