The paper presents an attempt of modelling liquid steel motion triggered off by electromagnetic stirring. Steel viscosity was calculated on the basis of temperature field determined with the use of stationary heat conduction equation. Velocity field was determined using Navier-Stokes equations and stream continuity equation. Solution was obtained using the finite element method. The developed model allows to carry out quick simulating calculations of fluid flow. Stationary solution was employed, and this allowed to reduce computation time substantially.

Identification of the Boundary Conditions in the Continuous Casting of Steel: The results of investigations relating the determination of thermal boundary conditions for continuous casting of steel were presented in the paper. The slab of dimensions 1100 mm x 220 mm was analyzed. In numerical calculations two models were compared. The first was the simple one and it used average heat transfer coefficient in both cooling zones. The second one used complex models in primary and secondary cooling zones. The presented models were verified on basing on an industrial data base. The problem was solved by the finite element method and the commercial numerical packet ProCAST.

Currently used TEG modules have low efficiency of about 5%. The energy generated by the TEG module depends on the temperature difference between the module surfaces. Heat exchange between the heat source and the module surface takes place through the contact between two rough solid surfaces. This creates contact resistance. It can be reduced by using a substance filling the empty spaces between the contact surfaces and applying pressure. During the tests, the efficiency of electricity generation with a thermoelectric generator was measured (TEG) at various pressure forces. The tests were carried out at a pressure force of 250 N, 500 N, 750 N and 1000 N. The selected values of pressure do not exceed the limit value arising from the thermoelectric generator (TEG) design. A copper element constituting the heat source was heated in a furnace. Next, it was pressed at an adequate force to the generator, which was placed on a water cooler. The impact of conductive materials placed between the faces of the heat source and the TEG on the generation of electricity was examined. At low forces, the use of a thermal pad as an intermediary substance does not result in improved heat transfer in the heat source—TEG generator system. Better filling of voids is provided by thermally conductive paste due to its properties.

Details var a2a_config = a2a_config || {}; a2a_config.onclick = 1; a2a_config.locale = "pl"; a2a_config.color_main = "D7E5ED"; a2a_config.color_border = "9D9D9D"; a2a_config.color_link_text = "ffffff"; a2a_config.color_link_text_hover = "ffffff"; a2a_config.color_bg = "d9d9d9"; a2a_config.icon_color = "#4e4e4e"; a2a_config.exclude_services = ["dihitt", "delicious", "whatsapp", "dzone", "sms", "stumpedia", "viber", "yahoo_messenger", "google_plus"]; Details PDF BIBTEX RIS Title A Comparison of Models Describing Heat Transfer in the Primary Cooling Zone of a Continuous Casting Machine Journal title Archives of Metallurgy and Materials Yearbook 2015 Issue No 1 March Authors Miłkowska-Piszczek, K. ; Rywotycki, M. ; Falkus, J. ; Konopka, K. Divisions of PAS Nauki Techniczne Publisher Institute of Metallurgy and Materials Science of Polish Academy of Sciences ; Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences Date 2015[2015.01.01 AD - 2015.12.31 AD] Identifier DOI: 10.1515/amm-2015-0038 ; ISSN 1733-3490 Source Archives of Metallurgy and Materials; 2015; No 1 March References Telejko (2009), of Metal - lurgy and Materials, Archives, 54, 837. ; Buczek (2012), procesu ciągłego odlewania stali - monografia, Modelowanie. ; Lan (2001), of Heat and Mass Transfer, International Journal, 44, 953. ; Malinowski (2012), of Metallurgy and Materials, Archives, 57, 1. ; Mahaparta (1991), Metal - lurgical and Materials, Transactions, 22, 875. ; Ha (2001), of Material processing Technology, Journal, 113, 1. ; Miłkowska (2013), of Metallurgy and Materials, Archives, 58, 1267. ; Rywotycki (2012), of Metallurgy and Materials, Archives, 57, 1. ; Falkus (2012), of Achievements in Materials and Manufacturing Engineering, Journal, 55, 668. ; Lan (2001), of Heat and Mass Transfer, International Journal, 44, 3431. ; Seyedein (1997), Mass Transfer, Heat, 40, 18. ; Miłkowska (2014), Metalurgija, 53, 571.

Glass wool waste constitutes a large amount of waste both in the production process and after the demolition of buildings. The storage of these materials in landfills is associated with their large volume and low mass which results from their low density. Considering the principle of a life cycle assessment, the possibility of recycling this type of waste should be ensured. The basic problem with the recycling process is the removal of the binder that connects the glass wool fibres before returning it to the production process. The paper presents the results of research on the process of heat treatment of glass wool with various temperatures and heating rates. The process of sinter formation and the possibilities of avoiding their formation were analysed. For this purpose, a series of tests in the field of thermal analysis were carried out, in which the temperature ranges in which heat was released were identified. Furthermore, a series of tests were carried out on cube samples with dimensions of 20 × 20 × 20 mm in a chamber furnace. Based on the research conducted, assumptions were developed for the heat treatment process of glass wool waste, which allows the removal of organic substances and prevents the formation of sinters.