An Experimental Study of the Formation of Surface Agglomerates in a Submerged Arc Furnace

10 Pages Posted: 22 Sep 2021

See all articles by Ville-Valtteri Visuri

Ville-Valtteri Visuri

Outokumpu Stainless Oy

E Kunelius

University of Oulu

E Puukko

University of Oulu

Timo Fabritius

University of Oulu- Process Metallurgy Research Unit

Date Written: September 12, 2021

Abstract

Submerged arc furnace (SAF) is a continuously operating furnace used for ferrochrome production. As the SAF is practically full of feed materials, liquid metal and slag, agglomerates may form in different parts of the furnace. The aim of this work was to set up an experimental apparatus to study the effect of temperature and atmosphere on the formation tendency of agglomerates. The agglomerates formed in the experiments were analyzed using a scanning electron microscope to study their agglomeration mechanism. The results indicate that the main agglomeration mechanisms are sintering and cold welding. Agglomerates formed by sintering exhibited both metallic and oxidic binder phases. The compression strength of the agglomerates was found to exhibit high variance but did exhibit a clear dependence on the agglomeration mechanism.

Keywords: ferrochrome, submerged arc furnace, agglomerates, experimental study

Suggested Citation

Visuri, Ville-Valtteri and Kunelius, J and Puukko, E and Fabritius, Timo, An Experimental Study of the Formation of Surface Agglomerates in a Submerged Arc Furnace (September 12, 2021). Proceedings of the 16th International Ferro-Alloys Congress (INFACON XVI) 2021, Available at SSRN: https://ssrn.com/abstract=3926630 or http://dx.doi.org/10.2139/ssrn.3926630

Ville-Valtteri Visuri (Contact Author)

Outokumpu Stainless Oy ( email )

Finland

J Kunelius

University of Oulu ( email )

P.O. Box 4600
Oulu FIN-90014, 90570
Finland

E Puukko

University of Oulu ( email )

P.O. Box 4600
Oulu FIN-90014, 90570
Finland

Timo Fabritius

University of Oulu- Process Metallurgy Research Unit ( email )

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