Abstract
Iron black commonly employs in thermal insulation riser sleeves due to its ability to react with aluminum powder, generating heat. However, the complex production process and unstable composition of iron black lead to high production costs. The potential of using arc furnace flue ash (AFFA) as a complete substitute for iron black and MnO2 and KNO3 oxidizing agents in conventional riser sleeves was investigated in this study. Waste material can be transformed into a valuable resource, while production costs can be reduced by utilizing arc furnace flue ash. The research examined the impact of varying types and amounts of arc furnace flue ash on riser sleeve temperature and holding time by conducting single-factor and orthogonal optimization experiments. The orthogonal optimization experiment determined that the optimum ratio of each oxidant was 6 % arc flue ash, 3 % MnO2 and 6 % KNO3. At this time, the highest temperature was 1512 ℃ and the holding time was 244 s. Results indicated that different types of arc furnace flue ash used as an oxidizing agent demonstrated superior holding capacity and heat generation performance compared to iron black. Additionally, a comparative analysis of factory casting experiments using ductile iron 600-3 (IS) revealed that both arc furnace flue ash and iron black risers effectively countered shrinkage. However, arc furnace flue ash risers exhibited improved mechanical properties, as evidenced by the hardness of the castings.
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Bibliography
[1] Lu, J.J., Qian, J.B., Yang, L. & Wang, H.F. (2023). Preparation and performance optimization of organosilicon slag exothermic insulating riser. Archives of Foundry Engineering. 23(1), 75-82. DOI: 10.24425/afe.2023.144283.
[2] Vasková, I., Conev, M. & Hrubovčáková, M. (2017). The influence of using different types of risers or chills on shrinkage production for different wall thickness for material EN-GJS-400-18LT. Archives of Foundry Engineering. 17(2), 131-136. DOI: 10.1515/afe-2017-0064.
[3] Sowa, L., Skrzypczak, T. & Kwiatoń, P. (2019). The influence of riser shape on feeding effectiveness of solidifying casting. Archives of Foundry Engineering. 19(4), 91-94. DOI: 10.24425/afe.2019.129636.
[4] Krajewski, P.K., Gradowski, A. & Krajewski, W.K. (2013). Heat exchange in the system mould - riser - ambient. part ii: surface heat emission from open riser to ambient. Archives of Metallurgy and Materials. 58(4), 1149-1153. DOI: 10.2478/amm-2013-0140.
[5] Xu, X. Hui,G,D. Ma, B, H . et al. (2017). Research on high efficiency heat insulation risers for casting. Casting technology. 38(03), 726-728. (in Chinese).
[6] Zhang, S.L., Wu, B., Qin, Z.G.,et al .(2010). Ignition temperature of 2Al/Fe2O3 aluminum thermite. Energy Containing Materials. 18(02), 162-166. (in Chinese).
[7] Duan, W. H., Li, G., Zu. C.S., et al (2017). Control of critical characteristics of heat-insulating riser sleeves and countermeasures for application problems. China Casting Equipment and Technology, 2017(06), 20-24. (in Chinese).
[8] Sambo, A. & Szymanek, A. (2014). Analysis of the distribution of chemical compounds from fly ash exposed to weather. Chemical and Process Engineering. 35(3), 265-275. DOI: 10.2478/cpe-2014-0020.
[9] Chen, J. (2022). Application of steelmaking electric arc furnace ash in sintered bricks[J]. Brick and Tile, 2020 (7): 25-27. DOI:10.16001/j.cnki.1001-6945.2020.07.011.
[10] Wang, J., Zhang, Y.Y., Cui, K.K., Fu. T., Gao, J.J. Shahid Hussain, Tahani Saad AlGarni. (2021). Pyrometallurgical recovery of zinc and valuable metals from electric arc furnace dust – A review. Journal of Cleaner Production. 298, 126788. DOI:10.1016/j.jclepro.2021.126788.
[11] Donald, J.R. & Pickles, C.A. (1996). Reduction of electric arc furnace dust with solid iron powder. Canadian Metallurgical Quarterly. 35(3), 255-267. DOI:10.1016/0008-4433(96)00009-2.
[12] Lin, X.L. Peng. Z.W., Yan. J.X., Li. Z., Z. Hwang, J.Y. Zhang, Y.B., Li, G.H., Jiang, T. (2017). Pyrometallurgical recycling of electric arc furnace dust. Journal of Cleaner Production. 149, 1079-1100. DOI:10.1016/j.jclepro.2017.02.128.
[13] Abhilash T. Nair, Aneesh Mathew, Archana A R, M Abdul Akbar.(2022). Use of hazardous electric arc furnace dust in the construction industry: A cleaner production approach. Journal of Cleaner Production. 377, 134282, 0959-6526. DOI:10.1016/j.jclepro.2022.134282
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