Semi-Solid State of Blast Furnace Slag Admixtures of AL₂O₃

• Autorzy: Migas P. , Korolczuk-Hejnak M.

Identyfikatory

DOI

10.2478/amm-2014-0028

Warianty tytułu

PL

Żużle wielkopiecowe domieszkowane Al₂O₃ w stanie stało-ciekłym

• Języki publikacji: EN

Abstrakty

EN

The nature and properties of liquid solutions - metallurgical slags (used in the pig iron and steel production) affect the quality of the final product and processing time. The main object of the study was slag system: CaO-SiO₂-MgO-Al₂O₃, when the content of Al₂O₃ was raised to ca. 25% in liquid and semi-liquid state. Measurements were performed using Searle’s method of concentric cylinder systems. Graphite measuring systems were used for testing with two types of bobs: smooth and perforated. Rheological measurements were carried out for five slag systems in the temperature range between 1310-1500°C, shear rate values were changed in the wide range between 1s^-1 to 150/180s^-1. FactSage application was used to calculate the mass of solid phases precipitating from the slag volume for different chemical compositions at various temperatures. In the temperature range in which the solid phases occurred in the slag the analysed systems show non-Newtonian behaviour.

PL

Charakter oraz właściwości ciekłych żużli metalurgicznych (wykorzystywanych w procesach wielkopiecowym oraz stalowniczym) wpływa na jakość produktu oraz na czas prowadzonego procesu. W niniejszej pracy analizowano żużle typu CaO-SiO₂-MgO-Al₂O₃. domieszkowane do ok. 25% Al₂O₃, w stanie ciekłym oraz stało-ciekłym. Badania zostały wykonane przy użyciu rotacyjnej metody z koncentrycznymi cylindrami typu Searle’a. Narzędzia pomiarowe wykonano z grafitu, charakteryzowały się one gładkimi oraz perforowanymi powierzchniami. Badania reologiczne wykonano dla pięciu systemów żużlowych w temperaturach 1310-1500°C. Prędkość ścinania w trakcie pomiarów zmieniana była od ls^-1 do 150/180s. ^-1 Pakiet FactSage został wykorzystany do obliczenia masy fazy stałej, wytrącającej się z objętości żużla, dla różnych składów chemicznych, w różnych temperaturach. W temperaturach, w których zaobserwowano występowanie fazy stałej charakter reologiczny badanych układów żużlowych odbiegał od zachowania ciała idealnego Newtona.

Słowa kluczowe

EN

liquid slags; rheology; non-Newtonian flow

PL

żużel ciekły; reologia

• Wydawca: Institute of Metallurgy and Materials Science of Polish Academy of Sciences ; Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences
• Czasopismo: Archives of Metallurgy and Materials
• Rocznik: 2014
• Tom: Vol. 59, iss. 1
• Strony: 173--182
• Opis fizyczny: Bibliogr. 27 poz., rys., tab.

Twórcy

autor

Migas P.

• AGH University of Science and Technology, al. A. Mickiewicza 30, 30-059 Krakow, Poland

autor

Korolczuk-Hejnak M.

• AGH University of Science and Technology, al. A. Mickiewicza 30, 30-059 Krakow, Poland

Bibliografia

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Uwagi

The above presented research was conducted as part of statutory research project MEiN no. 11.11.110.081. Financial support of National Science Centre for research project “Developing an empirical model of the rheological properties of liquid metals on the example of iron solutions” no. 2011/01/N/ST8/07368 is gratefully acknowledged.