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Liquidus Surface of Newly Defined "Ferrous Calcium Silicate Slag" and its Metallurgical Implications Slag 2000, Stockholm-Helsinki
Akira Yazawa ¹ ; Florian Kongoli ² ;
¹Tohoku University, 16-32, Niizaka, Aoba-ku, Sendai, 981-0934 JAPAN
²FLOGEN Technologies Inc,1255 Laird Blvd., Ste.388, Mont-Royal, Quebec, Canada

Keywords: Phase diagrams, slags, thermodynamics, modeling, solution, non-ferrous, pyrometallyrgy, Al2O3, MgO,

ABSTRACT

Ferrous calcium silicate (FCS) slag is defined as a new slag consisting of FeOx, CaO and SiO2 with a nominal composition near the di-calcium silicate surface. This slag is expected to solve the drawbacks of the "fayalite" and ferrite slags. However, the detailed knowledge of the liquidus surface of this new slag is not available in literature. Based on the authors' first article on the liquidus surface of FeOx-SiO2-CaO system containing Al2O3, MgO and Cu2O, the available liquid region of FCS slag is confirmed under relevant oxygen potentials along with the effect of minor oxides, especially Al2O3. The liquidus temperature is lowered by dissolution of copper oxide, and thus, FCS slag seems to be useful especially in the converting and direct smelting of copper. The obtained knowledge of the liquidus surface accompanied by further proper extensions can also be useful for the understanding of various metallurgical processes.

Cite this article as:
Akira Yazawa, Florian Kongoli (2000). Liquidus Surface of Newly Defined "Ferrous Calcium Silicate Slag" and its Metallurgical Implications. Slag 2000, Stockholm-Helsinki.

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