TY - JOUR

T1 - Assessment of the dissolution rate and behaviour of raw dolomite and limestone with different calcination degrees in primary steelmaking slags

AU - Cheremisina, Elizaveta

AU - Lesiak, Stefanie

AU - Rieger, Johannes

AU - Schenk, Johannes

AU - Firsbach, Felix

AU - Johnson, William

AU - Chopin, Thierry

AU - Nispel, Michael

N1 - Publisher Copyright: © 2022 Institute of Materials, Minerals and Mining.

PY - 2022/9/15

Y1 - 2022/9/15

N2 - 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.

AB - 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.

KW - Dissolution mechanisms

KW - slag-conditioner

KW - saturation concentration

KW - lime dissolution

KW - calcination condition

KW - slag morphology

KW - raw dolomite

KW - soft-burnt quicklime

KW - hard-burnt dolime

KW - limestone

UR - http://www.scopus.com/inward/record.url?scp=85138198919&partnerID=8YFLogxK

U2 - 10.1080/03019233.2022.2119064

DO - 10.1080/03019233.2022.2119064

M3 - Article

VL - 50.2023

SP - 379

EP - 391

JO - Ironmaking and steelmaking

JF - Ironmaking and steelmaking

SN - 0301-9233

IS - 4

ER -