Abstract
Casting the special cast iron that contained aluminium has generally been considered as a difficult operation. And hitherto this difficulty has been conceived to some contributions of its great tendency of slag-formation. The present author's attention has been directed to this tendency, and thermodynamical considerations have been undertaken to determine whether this difficulty only depends on this tendency or not, by treating the principal chemical reactions that may induce slag-formation when the special cast iron has been cast at 1, 400°C.
Also a similar consideration has been undertaken for an ordinary cast iron at the same conditions. Then free energies thus gained thermodynamically for these two kinds of cast iron have been compared. And the author has arrived at the conclusion that the difficulty as above described may not directly depend on its great tendency of slag-formation, but rather, on the chemical or physical properties of Al2O3 has been cast at 1, 400°C.
Also a similar consideration has been undertaken for an ordinary cast iron at the same conditions. Then free energies thus gained thermodynamically for these two kinds of cast iron have been compared. And the author has arrived at the conclusion that the difficulty as above described may not directly depend on its great tendency of slag-formation, but rather, on the chemical or phsical properties of Al2O3
