Study on the foaming of CaO-SiO2-FeO slags: Part I. Foaming parameters and experimental results
Abstract
In order to understand the effect of slag composition on foaming in iron and steelmaking processes, slag foaming was quantitatively studied for CaO-SiO2-FeO slags in the temperature range of 1250 °C to 1400 °C. It was found that slag foaming could be characterized by a foaming index (Σ), which is equal to the retention or traveling time of the gas in the slag, and the average foam life ( τ). The effects of P2O5, S, MgO, and CaF2 on foaming were studied. As expected, slag foaming increased with increasing viscosity and decreasing surface tension. It was found that suspended second-phase solid particles such as CaO, 2CaO SiO2, and MgO stabilized the foam and had a larger effect on foaming than changes in viscosity and surface tension for the slags studied.
- Publication:
-
Metallurgical Transactions B
- Pub Date:
- August 1989
- DOI:
- 10.1007/BF02654600
- Bibcode:
- 1989MTB....20..509I