Impact of Magnesia Grain Size on the Sn Situ Spinel Formation in Al2O3-MgO-C Refractories

摘要

The application of alumina-magnesia-carbon (AMC) bricks has been limited to the impact area and melting zone of steel ladles owing to the chemical attacks of slag in the slag zone. AMC bricks appeared as an alternative to MgO-C and Al2O3-C refractories, and their main advantage is the reduction of joint wear due to controlled residual expansion by in situ spinel MgAI2O4 formation [1]. Mukhopadhyay et al. reported that MgO-Al2O3 spinel readily forms above 1050 °C in the AMC bricks, and the maximum spinel formation takes place around 1600 °C.