Corrosion of MgO-C with Magnesium Aluminate Spinel Addition in A Steel Casting Simulator

Ceramics

Christopher Parr¹  Christoph Wöhrmeyer¹  Patrick Gehre²  Steffen Dudczig²  ChristosG. Aneziris²  Gert Schmidt² 

[1] Imerys Aluminates, Immeuble Pacific, 11, cours Valmy, Paris La Défense, 92800 Puteaux, France;Institute of Ceramic, Glass and Construction Materials, Technical University Bergakademie Freiberg, Agricolastraße 17, 09599 Freiberg, Germany;

关键词: refractory ceramics;    lifetime;    corrosion;   

DOI  :  10.3390/ceramics3010002

来源: DOAJ

【 摘 要 】

For more than 20 years, the sidewalls and bottom of steel ladles have been lined with carbon-bonded magnesia (MgO-C) and magnesia-alumina bricks (MAC). The alumina raw materials react with magnesia forming a spinel, which decreases open porosity and slag infiltration. The amount, grain size, and chemistry of the added spinel impact the properties of spinel-containing MgO-C. Corrosion tests have been performed in a steel casting simulator at 1580 °C using 18CrNiMo7-6 steel and Fe-rich slag as corrosion medium. Digital light microscopy and SEM/ EDS (scanning electron microscope with energy dispersive spectroscopy) were used to evaluate the corrosion mechanisms. The metal casting simulator test showed that the addition of CaO-MgO-Al₂O₃ aggregates results in the highest corrosion resistance against molten steel and synthetic basic slag compared to alumina-rich spinel aggregates.

【 授权许可】

Unknown