Abstract
Nowadays industrial waste recycling is the key concern for metal industry. Higher steel outputs are accompanied by increased by-products related with steel production. One of large-tonnage by-products of metallurgical production is electric arc furnace dust from arc steel furnaces. The use of metallurgical waste is therefore a promising area of research. The chemical composition of dust from arc steel furnace cleaning has been studied. The micro-structural features of gas cleaning dust have been investigated. Dust formation processes have been understood. The most efficient dust clotting schemes have been selected. It has been demonstrated that it is possible to granulate dust using process water as a liquid-phase binder. It has been established that a disk pelletizer makes it possible to obtain granules up to 5 mm in diameter with sufficient strength for their transportation and further drying. When using a screw extruder it is possible to produce granules of proper cylindrical shape. Heat released from hydration of free CaO being a part of dust and bulk mixing result in screw conveyor jamming and die hole clogging. Bulk dust density has been determined for gas cleaning of arc steel furnaces. Bulk density of granules obtained by two granulation methods has been determined - with the use of a disk petellizer and a screw granulator.
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Acknowledgements
This work was realized in the framework of the Program of flagship university development on the base of the Belgorod State Technological University named after V G Shukhov, using equipment of High Technology Center at BSTU named after V. G. Shukhov.
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Bondarenko, S.N., Bodyakov, A.N., Lebedev, M.S. (2021). Metallurgical Waste Recycling for Transport Construction. In: Klyuev, S.V., Klyuev, A.V. (eds) Proceedings of the International Conference Industrial and Civil Construction 2021. ICICC 2021. Lecture Notes in Civil Engineering, vol 147. Springer, Cham. https://doi.org/10.1007/978-3-030-68984-1_12
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DOI: https://doi.org/10.1007/978-3-030-68984-1_12
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