Publication Details

Aminorroaya, S., Edris, H., Tohidi, A., Parsi, J. & Zamani, B. (2004). Recycling of ladle furnace slags. 2nd International Conference on Process Development in Iron and Steelmaking (SCANMET II) (pp. 379-384). Sweden: MEFOS.


Ferrous industry slag is waste product of all steelmaking manufactures. These materials should be reused or stocked. There is abundant literature on the subject of reuse and recycling of blast furnace(BF), basic oxygen furnace(BOF), electric arc furnace(EAF). However, due to the fact that ladle furnaces(LF) have only been constructed in significant numbers since the 1980's, the relatively low slag volume in comparison to the other slags and also the high variability in slag chemistry, very few papers have been published on the recycling of ladle slag as separate materials.

Studies reveal that there is significant percent calcium aluminate in ladle furnace slags which is the main compound of ladle fluxes. These fluxes are widely used to clean steel production processes. Hence, using of ladle furnace slags as a part of ladle fluxes can be considered as an economical recovery for these materials.

In current study, the LF slags of Mobarakeh Steel Company (MSC) was separated from metallic part and also was crashed and sized. This powder was blended with some minerals in order to meet different chemical composition of synthetic fluxes. Plant trials were conducted to illustrate the useful chemical composition of flux through assessing the effect of LF slag addition on some criteria such as ladle slag fluidity and raw materials consumption. Eventually, suitable compound were specified. This flux not only provided the necessary fluidity but also reduced the raw materials consumption such as lime and metallic Aluminum. From the result analyses it can be predicted that the continuous use of this synthetic flux in addition to improve desulfurization in ladle, decrease the refractory consumption.