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

Research output: Contribution to journalArticleResearchpeer-review


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.
Original languageEnglish
Pages (from-to)379-391
Number of pages13
JournalIronmaking and steelmaking
Issue number4
Publication statusE-pub ahead of print - 15 Sept 2022

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


  • Dissolution mechanisms
  • slag-conditioner
  • saturation concentration
  • lime dissolution
  • calcination condition
  • slag morphology
  • raw dolomite
  • soft-burnt quicklime
  • hard-burnt dolime
  • limestone

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