Refining of steel melts using alkaline earth metals
In secondary refining of steel melts, the use of alkaline earth metals as a slag phase can be of great significance to remove unwanted elements of the main groups IV and V. Fundamental data on corresponding refining reactions and on the solubilities of the alkaline earth metals Mg, Ca, Sr and Ba in iron and iron alloys have been determined by equilibrating the two metal phases, contained in CaO crucibles, under excess argon pressure at 1600 C. The experimental results indicate that elements such as N, P and Sn are largely transferred from the iron to the alkaline earth metal phase using Ca, Sr or Ba. Residual alkaline earth metal contents are found around 0.03% Ca, 0.004% Sr and 0.0005% Ba. Solubilities of Ca, Sr and Ba in iron are remarkably increased in the presence of Ni and decreased by additions of Cr.
Bibliographic Reference: EUR 12252 DE (1989) 68 pp., MF, ECU 4, blow-up copy ECU 8.75
Record Number: 199010339 / Last updated on: 1994-12-01
Original language: de
Available languages: de