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Wyszukujesz frazę "Pieprzyca, T." wg kryterium: Autor

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    Wyświetlanie 1-6 z 6
    Tytuł:
    The Influence of Parameters of Argon Purging Process Through Ladle on the Phenomena Occuring in the Area of Phase Distributions: Liquid Steal-Slag
    Autorzy:
    Pieprzyca, J.
    Merder, T.
    Saternus, M.
    Gryc, K.
    Socha, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/356927.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    steelmaking
    ladle
    slag
    physical modelling
    Opis:
    Purging the liquid steel with inert gases is a commonly used treatment in secondary metallurgy. The main purposes for which this method is used are: homogenization of liquid steel in the entire volume of the ladle, improvement of mixing conditions, acceleration of the absorption process of alloy additives and refining of liquid steel from non-metallic inclusions. The basic processing parameters of this treatment are: gas flow rate and the level of gas dispersion in liquid steel. The level of gas dispersion depends on the design and location of the porous plug in the ladle. Therefore, these parameters have a significant impact on the phenomena occurring in the contact zone of liquid steel with slag. Their improper selection may cause secondary contamination of the bath with exogenous inclusions from the slag, or air atmosphere due to discontinuity of the slag and exposure of the excessive surface of the liquid steel free surface. The article presents the results of modelling research of the effect of liquid steel purging with inert gases on phenomena occurring in this zone. The research was carried out using the physical (water) model of steel ladle. As a modelling liquid representing slag, paraffin oil was used, taking into account the conditions of similarity with particular reference to the kinematic viscosity. The results of the conducted research were presented in the form of visualization of phenomena occurring on the surface of the model liquid free surface in the form of photographs. The work is a part of a bigger study concerning modelling of ladle processes.
    Źródło:
    Archives of Metallurgy and Materials; 2019, 64, 2; 653-658
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Physical Modelling of Degassing Process by Blowing of Inert Gas
    Autorzy:
    Michalek, K.
    Tkadlečková, M.
    Socha, L.
    Gryc, K.
    Saternus, M.
    Pieprzyca, J.
    Merder, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/351001.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    physical modelling
    refining ladle
    inert gas blowing
    degassing process
    impeller
    Opis:
    This paper deals with the possibilities of using physical modelling to study the degassing of metal melt during its treatment in the refining ladle. The method of inert gas blowing, so-called refining gas, presents the most common operational technology for the elimination of impurities from molten metal, e.g. for decreasing or removing the hydrogen content from liquid aluminium. This refining process presents the system of gas-liquid and its efficiency depends on the creation of fine bubbles with a high interphase surface, uniform distribution, long period of its effect in the melt, and mostly on the uniform arrangement of bubbles into the whole volume of the refining ladle. Physical modelling represents the basic method of modelling and it makes it possible to obtain information about the course of refining processes. On the basis of obtained results, it is possible to predict the behaviour of the real system during different changes in the process. The experimental part focuses on the evaluation of methodical laboratory experiments aimed at the proposal and testing of the developed methods of degassing during physical modelling. The results obtained on the basis of laboratory experiments realized on the specific physical model were discussed.
    Źródło:
    Archives of Metallurgy and Materials; 2018, 63, 2; 987-992
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Research and Development of the Solidification of Slab Ingots from Special Tool Steels
    Autorzy:
    Tkadlečková, M.
    Michalek, K.
    Gryc, K.
    Socha, L.
    Jonšta, P.
    Saternus, M.
    Pieprzyca, J.
    Merder, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/356096.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    tool steel
    steelmaking
    slab ingot
    numerical modelling
    porosity
    Opis:
    The paper describes the research and development of casting and solidification of slab ingots from special tool steels by means of numerical modelling using the finite element method. The pre-processing, processing and post-processing phases of numerical modelling are outlined. Also, problems with determining the thermophysical properties of materials and heat transfer between the individual parts of the casting system are discussed. Based on the type of grade of tool steel, the risk of final porosity is predicted. The results allowed to improve the production technology of slab ingots, and also to verify the ratio, the chamfer and the external/ internal shape of the wall of the new designed slab ingots.
    Źródło:
    Archives of Metallurgy and Materials; 2017, 62, 3; 1453-1458
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Study of Tundish Slag Entrainment Using Physical Modelling
    Autorzy:
    Michalek, K.
    Gryc, K.
    Socha, L.
    Saternus, M.
    Tkadlečková, M.
    Pieprzyca, J.
    Merder, T.
    Pindor, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/353001.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    steelmaking
    tundish
    slag entrainment
    vortex
    physical modelling
    Opis:
    This paper deals with the possibilities of using physical modelling to study the slag entrainment in the tundish. A level of steel in the tundish is changing during sequential continuous casting. The most significant decrease in the steel level occurs when replacing ladles. It is generally known that if the height of steel level in the tundish drops below a certain critical level, it may generate vortexes over the nozzles and as a consequence entrainment of tundish slag into individual casting strands can occur. Thus, it is necessary to identify the critical level of steel for specific operational conditions. In this paper, the development of physical modelling methodology is described as well as physical model corresponding to operational continuous casting machine No. 2 in Třinecké železárny, a.s. The obtained results are discussed.
    Źródło:
    Archives of Metallurgy and Materials; 2016, 61, 1; 257-260
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Physical Modelling of Tundish Slag Entrainment under Various Technological Conditions
    Autorzy:
    Michalek, K.
    Gryc, K.
    Socha, L.
    Tkadlečková, M.
    Saternus, M.
    Pieprzyca, J.
    Merder, T.
    Pindor, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/351348.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    steelmaking
    tundish
    slag entrainment
    flow pattern
    physical modelling
    Opis:
    This paper deals with the issue of physical modelling of vortexes creation and tundish slag entrainment over the mouth of the nozzle into the individual casting strands. Proper physical model is equivalent to the operational continuous casting machine No. 2 in TŘINECKÉ ŽELEZÁRNY, a.s. Physical modelling methodology and simulated operational conditions are shortly described. Physical modelling was used for the evaluation of current conditions of steel casting at the application of different impact pads in the tundish. Further, laboratory measurement on the physical model aiming the determination of exact critical periods of vortexes creation and study of the slag entrainment as a consequence of changes in surface level during the tundish refilling to standard level were realised. The obtained results were analysed and discussed.
    Źródło:
    Archives of Metallurgy and Materials; 2017, 62, 3; 1467-1471
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Study of Solidification of Continuously Cast Steel Round Billets Using Numerical Modellin
    Autorzy:
    Tkadleckova, M.
    Válek, L.
    Socha, L.
    Saternus, M.
    Pieprzyca, J.
    Merder, T.
    Michalek, K.
    Kováč, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/353911.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    steel
    billet
    continuous casting
    numerical modelling
    metallurgical length
    Opis:
    The paper is dedicated to the verification of solidification of continuously cast round steel billets using numerical modelling based on the finite element method. The aim of numerical modelling is to optimize the production of continuously cast steel billets of round format. The paper describes the pre-processing, processing and post-processing phases of numerical modelling. Also, the problems with determination of the thermodynamic properties of materials and the heat transfer between the individual parts of the casting system, including the definition of the heat losses along the casting strand in the primary and secondary cooling, were discussed. The first results of numerical simulation show the so-called thermal steady state of continuous casting. The temperature field, the metallurgical length and the thickness of the shell at the end of the mould were predicted. The further research will be concentrated on the prediction the risk of the cracks and the porosity based on the different boundary conditions.
    Źródło:
    Archives of Metallurgy and Materials; 2016, 61, 1; 221-226
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

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