INFLUENCE OF PRODUCTION TECHNOLOGIES ON STEEL CLEANNESS: A COMPARISON
Abstract
The contribution presents comparison of three different steelmaking technologies efficiency in production of clean steel. Three different aspects of steel cleanness are considered: Desulphurization of steel; Content, composition and morphology of sulphide inclusions; Content, composition and morphology of oxide inclusions.
The paper deals with three different steel production and treatment technologies and their impact on cleanness of produced steel. The technologies are as follows:
1. Production of steel in top blowed LD converter and ladle treatment of molten steel by lime based additions driven into melt by Scandinavian Lancers system (LD - SL).
2. Production of steel in combined blowing converter and treatament of molten steel in ladle by inert gas bubbling (CBC).
3. Production of steel in electric arc furnace followed by molten steel treatment in ladle furnace (Al wire and CaSi core profile) (EAF LF).
Main features of each technology are shown in Table 1a,b,c. The use of each of three mentioned technologies and their impact on steel cleanness were already published by the authors [1,2,3]. The aim of this contribution is to compare the effectiveness of the three technologies in production of clean steel. Three aspects are described:
Desulphurization ability;
Content, composition and morphology of sulphidic inclusions;
Content, composition and morphology of oxidic inclusions.
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