Assessment of the dissolution rate and behaviour of raw dolomite and limestone with different calcination degrees in primary steelmaking slags

Elizaveta Cheremisina, Stefanie Lesiak, Johannes Rieger, Johannes Schenk, Felix Firsbach, William Johnson, Thierry Chopin, Michael Nispel

Publikation: Beitrag in FachzeitschriftArtikelForschungBegutachtung


Fluxes are added to steelmaking process to form basic slag and limit refractory lining consumption.Early formation of CaO- and MgO-saturated slag is critical for process productivity. To achieve this,flux must be dissolved in the melt in a limited process time, and the properties of a slag additiveinfluence thefluxing efficiency. The dissolution behavior of samples with different qualities (i.e.raw dolomite, limestone, soft-burnt and hard-burnt quicklime and dolime) was investigated in thepre-melted model BOF and EAF slags at 1673 K and 1723 K. The disc-shaped sample wasimmersed into the melt and left there until slag solidification was reached. After a holding timebetween 5 and 20 minutes, the crucible with the sample were quenched with liquid nitrogen. Thefused samples were analyzed by SEM method. Based on comparison of slag morphology andconcentration changes in the slag, the dissolution behavior of the samples was examined.
Seiten (von - bis)379-391
FachzeitschriftIronmaking and steelmaking
PublikationsstatusElektronische Veröffentlichung vor Drucklegung. - 15 Sep. 2022

Bibliographische Notiz

Funding Information:
The authors thank Lhoist Business Innovation Center for funding the research and the preparation of the testing samples. The authors gratefully acknowledge the funding support of K1-MET GmbH, metallurgical competence center. The research programme of the K1-MET competence center is supported by COMET (Competence Center for Excellent Technologies), the Austrian programme for competence centers. COMET is funded by the Federal Ministry for Climate Action, Environment, Energy, Mobility, Innovation and Technology, the Federal Ministry for Labour and Economy, the Federal States of Upper Austria, Tyrol and Styria as well as the Styrian Business Promotion Agency (SFG) and the Standortagentur Tyrol. Furthermore, Upper Austrian Research continuously supports K1-MET.

Publisher Copyright:
© 2022 Institute of Materials, Minerals and Mining.

Dieses zitieren