Al2O3-CaO-CaS

Control of sulfide and oxysulfide inclusions in steels has been an important issue in the steelmaking process for many years. One of the typical sulfide inclusions found in steel is CaS. CaS is known to be harmful, to cause nozzle clogging and to cause the physical properties of the steel to deteriorate. Therefore, it is necessary to remove or tightly control the CaS during the refining and casting processes. The solubility of CaS in liquid CaO-Al2O3-CaS is thus an important property and can be examined using the TCS Metal Oxide Solutions Database (TCOX).

Isothermal section of the Al2O3-CaO-CaS system at 1600 °C with experimental data

Figure 1: An isothermal section of the Al2O3-CaO-CaS system at 1600 °C with experimental data [1984Ozt; 2013Pia].

Isothermal section of the Al2O3-CaO-CaS system at 1600 °C with experimental data

Figure 2: Close up of the isothermal section of the Al2O3-CaO-CaS system at 1600 °C.

References

[1984Ozt] B. Ozturk, E. T. Turkdogan, Equilibrium S distribution between molten calcium aluminate and steel. Met. Sci. 18, 299–305 (1984).

[2013Pia] R. Piao, H.-G. Lee, Y.-B. Kang, Experimental investigation of phase equilibria and thermodynamic modeling of the CaO–Al2O3–CaS and the CaO–SiO2–CaS oxysulfide systems. Acta Mater. 61, 683–696 (2013).