4.5 Article

Experimental Investigation of the Slags Co-saturated With CaO and MgO in the CaO-MgO-Al2O3 System and Reassessment of the Ternary CaO-MgO-Al2O3 Phase Diagram

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The composition of co-saturated slag in the CaO-MgO-Al2O3 system was determined using quenching experiments, and a thermodynamic re-assessment of the system was performed.
The CaO-MgO-Al(2)O(3 )system is one of the most fundamental oxide systems for various metallurgical and ceramic applications. The composition of slag co-saturated by CaO and MgO is important for accurate slag control in the secondary refining steelmaking process. In the present study, the co-saturated slag compositions at 1550 degrees C to 1650 degrees C were determined from the classical quenching experiment with Pt crucible. Based on the new experimental data and available data in literature, thermodynamic re-assessment of the CaO-MgO-Al2O3 system was carried out and new phase diagrams were calculated in the ternary system.

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