Contribution to the Slagging of MgO in Secondary Metallurgical Slags

C. Brüggmann

ThyssenKrupp Nirosta, 47798 Krefeld, Germany


Volume 3, Issue 1, Pages 105 - 109


MgO is an indispensible refractory for modern secondary steelmaking. Although its wear behaviour is generally influenced bymultiple factors great attention should be paid to chemical wear especially by process slags. So within the scope of this paper aspects of the MgO saturation in secondary metallurgical slags and the corrosion process are taken up. Regarding the chemical wear behaviour the concentration difference of the wear determining component in the slag is of prime importance. Yet inside the slag infiltrated microstructure, subsequently underlying MgO saturation, the corrosion process does never come to rest. In the infiltrated layer of the refractory the mechanisms of particle disintegration and Ostwaldripening effectively degrade the microstructure giving rise to an erosive wear in practice.


ladle slag, MgO saturation, wear and corrosion of MgO refractories



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