Koblenz-Landau University (Koblenz, Germany):

D. Hahn, Bach. Sci., Institute of Integrated Natural Sciences, e-mail: dominikhahn@uni-koblenz.de
P. Quirmbach, Prof., Dr., Head of Technical Chemistry Dept

HuK Umweltlabor GmbH (Wenden-Hünsborn, Germany):
L. Füchtjohann, Dr., CEO

Accuracy and reliability of the measuring method were confirmed in the framework of comparative measurement conducted in the laboratory. The results were characterized by high reproducibility and permanent accuracy due to automatic procedure of specimen preparation to dissolution. It is shown that large measuring series can be conducted during only 24 hours. Ion chromatographic analysis of pyrolysis products can be considered as a very reliable and efficient method for qualification of secondary materials that are ecologically important. Pyrolitic and hydrolytic preparation allows to remove hindering matrix components, to dissolve fluorine components and to deliver them in the analytical node and to register reliably their amount. It is concluded that proper slag processing is rather necessary for safe usage of material resources. Precise chemicalanalytical analysis of general balance of fluorine in slag composition uses ion chromatographic analysis of pyrolysis products, taking into account ultimate allowable values. It helps to provide ecological safety and utilization potential of steelmaking slags.

1. Maßnahmen zur Erhaltung des umweltgerechten Recyclings von Feuerfestreststoffen und der nachhaltigen Nutzung von Elektrolichtbogenofen-schlacken unter besonderer Berücksichtigung der Herkunft und des Verhaltens von Fluorid, Mineralmahlwerk Westerwald Horn GmbH & Co. KG, Aktenzeichen 32127/01.
2. Ecknauer+Schoch: Combustion Ion Chromatography: Fast and reliable determination of halogens and sulfur, Herisau, 2013.
3. Combustion Module: Betriebsanleitung, Analytik Jena AG / Metrohm GmbH, Herisau, 2012.