Slag Investigation from Iron Smelting and Iron Processing Sites in Austria – From Hallstatt and Medieval Period and the 19th Century

Roland Haubner; Susanne Strobl

doi:10.4028/www.scientific.net/MSF.782.635

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HomeMaterials Science ForumMaterials Science Forum Vol. 782Slag Investigation from Iron Smelting and Iron...

Slag Investigation from Iron Smelting and Iron Processing Sites in Austria – From Hallstatt and Medieval Period and the 19^th Century

Abstract:

Slags from three iron smelting and processing sites were investigated. The composition of the slags is connected to the metallurgical processes and the investigation should provide an indication of the process conditions.A slag from a small bloomery furnace at the archaeological site Waschenberg (Hallstatt period) was investigated. Slags from the medieval period were found near Eisenerz and at this time iron was produced in developed bloomery furnaces (Stuckofen). These slags are termed fayalitic slags and they consist of wustite (FeO), fayalite (Fe₂SiO₄) and glass-phase (amorphous silicates) in various concentrations. Three solidification-types were described and correlated with the microstructures and the FeO-SiO₂-CaO₂ phase diagram.During the 19^th century steel was produced in puddling furnaces by remelting iron products from Eisenerz. Such slags, from this process, found in the surroundings of Palfau, were investigated and contain FeO and Ca rich glass-phase, but no fayalite.Due to the different compositions of the slags the solidification and the microstructures are different.

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Periodical:

Materials Science Forum (Volume 782)

Pages:

635-640

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.782.635

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Online since:

April 2014

Authors:

Roland Haubner*, Susanne Strobl

Keywords:

Bloomery Furnace, Fayalite, Puddling Furnace, Slag, Wuestite

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