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Leaching of Electric Arc Furnace Slag for Selective Recovery of Iron: Effect of Temperature, H2SO4/HCl Acid, and Oxidant Concentration

Faizatul Syazwani Zulkifili, Hawaiah Imam Maarof, Norhaslinda Nasuha and Siti Wahidah Puasa

Pertanika Journal of Science & Technology, Volume 30, Issue 3, July 2022

DOI: https://doi.org/10.47836/pjst.30.3.14

Keywords: Acid leaching, EAF slag, hydrogen peroxide, iron, oxidant, sulphuric acid

Published on: 25 May 2022

A significant amount of electric arc furnace slag (EAFS) is generated as a by-product from the steelmaking industry. Acid leaching was carried out with both the presence and absence of oxidants to intensify the iron recovery from EAFS in the final product. Oxidative leaching refers to the process whereby the oxidant helps in removing one or more electrons in a chemical reaction. In contrast, non-oxidative leaching means there is no transfer of electrons during the process. In this study, hydrogen peroxide and potassium permanganate were used as the oxidants in the leaching process. The influences of the leaching factors, such as the concentration of leaching reagent (0.5–8 M), leaching temperature (323–363 K), EAFS particle size (50–300 μm) and concentration of the oxidants (0.5–2 M), were also studied. The findings revealed that the particle size, acid dosage and type of oxidants significantly influenced iron recovery. Smaller particle sizes greatly improved the recovery of iron. İn the non-oxidative leaching environment, sulphuric acid exhibited a higher iron recovery than hydrochloric acid. The recovery efficiency was 21.47% higher. For oxidative leaching, the leaching efficiency of iron was more favourable at lower concentrations of hydrogen peroxide in both sulphuric and hydrochloric acid, and the opposite was the case for potassium permanganate. An overdose of hydrogen peroxide can cause radical quenching, which will reduce oxidant utilisation. Oxidative leaching resulted in better iron recovery at optimum leaching conditions with a temperature of 50°C, 5 M H2SO4, 1 M hydrogen peroxide, a leaching time of 60 minutes, a solid to liquid ratio of 1:20 and a stirring rate of 300 rpm.

  • Brooks, L., Gaustad, G., Gesing, A., Mortvedt, T., & Freire, F. (2019). Ferrous and non-ferrous recycling: Challenges and potential technology solutions. Waste Manag, 85, 519-528. https://doi.org/10.1016/j.wasman.2018.12.043

  • Fisher, L. V., & Barron, A. R. (2019). The recycling and reuse of steel making slags -A review. Resources, Conservation and Recycling, 146, 244-255. https://doi.org/10.1016/j.resconrec.2019.03.010

  • Hafez, H., Kassim, D., Kurda, R., Silva, R. V., & de Brito, J. (2021). Assessing the sustainability potential of alkali-activated concrete from electric arc furnace slag using the ECO2 framework. Construction and Building Materials, 281, Article 122559. https://doi.org/10.1016/j.conbuildmat.2021.122559

  • Halli, P., Agarwal, V., Partinen, J., & Lundström, M. (2020). Recovery of Pb and Zn from a citrate leach liquor of a roasted EAF dust using precipitation and solvent extraction. Separation and Purification Technology, 236, Article 116264. https://doi.org/10.1016/j.seppur.2019.116264

  • Hazaveh, P., Karimi, S., Rashchi, F., & Sheibani, S. (2020). Purification of the leaching solution of recycling zinc from the hazardous electric arc furnace dust through an as-bearing jarosite. Ecotoxicology and Environmental Safety, 202, Article 110893. https://doi.org/10.1016/j.ecoenv.2020.110893

  • Ichlas, Z. T., Rustandi, R. A., & Mubarok, M. Z. (2020). Selective nitric acid leaching for recycling of lead-bearing solder dross. Journal of Cleaner Production, 264, Article 121675. https://doi.org/10.1016/j.jclepro.2020.121675

  • Ji, H., Mi, X., Tian, Q., Liu, C., Yao, J., Ma, S., & Zeng, G. (2021). Recycling of mullite from high-alumina coal fly ash by a mechanochemical activation method: Effect of particle size and mechanism research. Science of The Total Environment, 784, Article 147100. https://doi.org/10.1016/j.scitotenv.2021.147100

  • Keymanesh, M. R., Ziari, H., Zalnezhad, H., & Zalnezhad, M. (2021). Mix design and performance evaluation of microsurfacing containing electric arc furnace (EAF) steel slag filler. Construction and Building Materials, 269, Article 121336. https://doi.org/10.1016/j.conbuildmat.2020.121336

  • Kim, J., & Azimi, G. (2020). Technospheric mining of niobium and titanium from electric arc furnace slag. Hydrometallurgy, 191, Article 105203. https://doi.org/10.1016/j.hydromet.2019.105203

  • Kremser, K., Thallner, S., Strbik, D., Spiess, S., Kucera, J., Vaculovic, T., Vsiansky, D., Haberbauer, M., Mandl, M., & Guebitz, G. M. (2021). Leachability of metals from waste incineration residues by iron- and sulfur-oxidizing bacteria. Journal of Environmental Management, 280, Article 111734. https://doi.org/10.1016/j.jenvman.2020.111734

  • Kukurugya, F., Vindt, T., & Havlík, T. (2015). Behavior of zinc, iron and calcium from electric arc furnace (EAF) dust in hydrometallurgical processing in sulfuric acid solutions: Thermodynamic and kinetic aspects. Hydrometallurgy, 154, 20-32. https://doi.org/10.1016/j.hydromet.2015.03.008

  • Li, P., Luo, S. H., Wang, Y., Yan, S., Teng, F., Feng, J., Wang, Q., Zhang, Y., Mu, Wenning., Zhai, X., & Liu, X. (2021). Cleaner and effective recovery of metals and synthetic lithium-ion batteries from extracted vanadium residue through selective leaching. Journal of Power Sources, 482, Article 228970. https://doi.org/10.1016/j.jpowsour.2020.228970

  • Lie, J., Lin, Y. C., & Liu, J. C. (2021). Process intensification for valuable metals leaching from spent NiMH batteries. Chemical Engineering and Processing - Process Intensification, 167, Article 108507. https://doi.org/10.1016/j.cep.2021.108507

  • Linsong, W., Peng, Z., Yu, F., Sujun, L., Yue, Y., Li, W., & Wei, S. (2020). Recovery of metals from jarosite of hydrometallurgical nickel production by thermal treatment and leaching. Hydrometallurgy, 198, Article 105493. https://doi.org/10.1016/j.hydromet.2020.105493

  • Martinho, F. C. G., Picado-Santos, L. G., & Capitão, S. D. (2018). Influence of recycled concrete and steel slag aggregates on warm-mix asphalt properties. Construction and Building Materials, 185, 684-696. https://doi.org/10.1016/j.conbuildmat.2018.07.041

  • Mohammadzadeh, M., Bagheri, H., & Ghader, S. (2020). Study on extraction and separation of Ni and Zn using [bmim][PF6] IL as selective extractant from nitric acid solution obtained from zinc plant residue leaching. Arabian Journal of Chemistry, 13(6), 5821-5831. https://doi.org/10.1016/j.arabjc.2020.04.019

  • Monosi, S., Ruello, M. L., & Sani, D. (2016). Electric arc furnace slag as natural aggregate replacement in concrete production. Cement and Concrete Composites, 66, 66-72. https://doi.org/10.1016/j.cemconcomp.2015.10.004

  • Nasuha, N., Ismail, S., & Hameed, B. H. (2016). Activated electric arc furnace slag as an efficient and reusable heterogeneous Fenton-like catalyst for the degradation of Reactive Black 5. Journal of the Taiwan Institute of Chemical Engineers, 67, 235-243. https://doi.org/10.1016/j.jtice.2016.07.023

  • Nasuha, N., Ismail, S., & Hameed, B. H. (2017). Activated electric arc furnace slag as an effective and reusable Fenton-like catalyst for the photodegradation of methylene blue and acid blue 29. Journal of Environmental Management, 196, 323-329. https://doi.org/10.1016/j.jenvman.2017.02.070

  • Nasuha N, Shaziela N, et al. (2019) Recovery of iron from electric arc furnace slag: effect of heating temperature and time. IOP Conference Series: Materials Science and Engineering 551. https://doi.org/10.1088/1757-899x/551/1/012119

  • Plaza, L., Castellote, M., Nevshupa, R., & Jimenez-Relinque, E. (2021). High-capacity adsorbents from stainless steel slag for the control of dye pollutants in water. Environmental Science and Pollution Research, 28, 23896-23910. https://doi.org/10.1007/s11356-020-12174-0

  • Rao, M., Shahin, C., & Jha, R. (2021). Optimization of leaching of copper to enhance the recovery of gold from liberated metallic layers of WPCBs. Materials Today: Proceedings, 46(3), 1515-1518. https://doi.org/10.1016/j.matpr.2021.01.052

  • Roy, S., Miura, T., Nakamura, H., & Yamamoto, Y. (2018). Investigation on applicability of spherical shaped EAF slag fine aggregate in pavement concrete - Fundamental and durability properties. Construction and Building Materials, 192, 555-568. https://doi.org/10.1016/j.conbuildmat.2018.10.157

  • Roy, S., Miura, T., Nakamura, H., & Yamamoto, Y. (2019). Investigation on material stability of spherical shaped EAF slag fine aggregate concrete for pavement during thermal change. Construction and Building Materials, 215, 862-874. https://doi.org/10.1016/j.conbuildmat.2019.04.228

  • Roy, S., Miura, T., Nakamura, H., & Yamamoto, Y. (2020). High temperature influence on concrete produced by spherical shaped EAF slag fine aggregate - Physical and mechanical properties. Construction and Building Materials, 231, Article 117153. https://doi.org/10.1016/j.conbuildmat.2019.117153

  • Sun, X., & Yi, Y. (2021). Acid washing of incineration bottom ash of municipal solid waste: Effects of pH on removal and leaching of heavy metals. Waste Management, 120, 183-192. https://doi.org/10.1016/j.wasman.2020.11.030

  • Teo, P. T., Anasyida, A. S., Kho, C. M., & Nurulakmal, M. S. (2019). Recycling of Malaysia’s EAF steel slag waste as novel fluxing agent in green ceramic tile production: Sintering mechanism and leaching assessment. Journal of Cleaner Production, 241, Article 118144. https://doi.org/10.1016/j.jclepro.2019.118144

  • Wang, F., Gu, Z., Hu, Y., & Li, Q. (2021). Split dosing of H2O2 for enhancing recalcitrant organics removal from landfill leachate in the Fe0/H2O2 process: Degradation efficiency and mechanism. Separation and Purification Technology, 278, Article 119564. https://doi.org/10.1016/j.seppur.2021.119564

  • Yang, G. C. C., Chuang, T. N., & Huang, C. W. (2017). Achieving zero waste of municipal incinerator fly ash by melting in electric arc furnaces while steelmaking. Waste Management, 62, 160-168. https://doi.org/10.1016/j.wasman.2017.02.021

  • Yin, W., & Chen, K. (2021). Effect of the particle size and microstructure characteristics of the sample from HPGR on column bioleaching of agglomerated copper ore. Hydrometallurgy, 200, Article 105563. https://doi.org/10.1016/j.hydromet.2021.105563

  • Zhang, N., Wu, L., Liu, X., & Zhang, Y. (2019). Structural characteristics and cementitious behavior of basic oxygen furnace slag mud and electric arc furnace slag. Construction and Building Materials, 219, 11-18. https://doi.org/10.1016/j.conbuildmat.2019.05.156

  • Zhang, S., & Liu, W. (2017). Application of aerial image analysis for assessing particle size segregation in dump leaching. Hydrometallurgy, 171, 99-105. https://doi.org/10.1016/j.hydromet.2017.05.001

ISSN 0128-7680

e-ISSN 2231-8526

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