Preliminary communication

Reduction of chromium oxides with calcium carbide during thestainless steelmaking process

B. Arh ; Institute of metals and technology, Ljubljana, Slovenia
F. Vode ; Institute of metals and technology, Ljubljana, Slovenia
F. Tehovnik ; Institute of metals and technology, Ljubljana, Slovenia
J. Burja ; Institute of metals and technology, Ljubljana, Slovenia

Abstract

An efficient reduction of chromium from slag requires an appropriate reduction agent for the given steelmaking technology. The usual slag reduction praxis consists of carbon injections and additions of ferrosilicon and aluminum.Reduction of chromium containing slags with calcium carbide is an appealing alternative. Calcium carbide is a strong reduction agent that unlike ferrosilicon and aluminum also provides the possibility of foaming slag formation.Experimental work regarding chromium slag reduction with calcium carbide towards usual slag reduction praxis is described in this work. The results show that higher reduction rates in the stage of refining period of the melt and higher level of overall chromium reduction from slag can be reached with the blowing of CaC₂.

Keywords

electric arc furnace (EAF); stainless steel; chromium oxide; slag reduction; calcium carbide

Hrčak ID:

128964

URI

https://hrcak.srce.hr/128964

Publication date:

1.4.2015.

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