Water vapor solubility in ladle-refining slags

Abstract

A thermo-gravimetric technique was used to determine the hydrogen solubilities of some Al 2 O 3 -CaOMgO-SiO 2 quaternary slags. The focus of the work was to determine the water capacities in slags having lower SiO 2 concentrations, which were relevant to industrial practices. The majority of the experiments were carried out in the temperature interval 1747 to 1827 K with water pressure of 157 mbar. The reliability of the experiments was confirmed using a quenching technique. The temperature was found to have a negligible effect on the water solubilities. The composition of the slag did not seem to significantly affect the water capacity. However, as the slag composition approached CaO saturation, a considerable increase of the solubility was noticed.

Development of a Novel Flash Ironmaking Technology with Greatly Reduced Energy Consumption and CO2 Emissions

“…The results of this work are important in the development of an ecofriendly, novel, flash ironmaking process with the potential for steelmaking [28] in a single continuous process [1,6,7,22,23]. The solubility of water in various slags has been studied by many researchers [31][32][33][34][35][36][37][38][39][40][41]. In this work, the effects of the water vapor on the equilibrium distribution of elements such as sulfur [42,43], phosphorus [7,42], and manganese [44] in addition to the effects on the activities of iron and magnesium oxides were investigated [6,45,46].…”

Effect of water vapour content in H2–H2O–CO–CO2mixtures on activity of iron oxide in slags relevant to novel flash ironmaking technology

“…This is attributed to the fact that none of the aforementioned models considered the effect of gas atmosphere on c FeO . It is worth noting that the range of [45][46][47][48][49][50][51] has shown that water has a significant solubility in slag in the temperature range of 1500-1650uC. In weakly to moderately basic slags, water dissolution may involve the following reaction 51…”

Hydrogen permeability of slags containing calcium fluoride

“…Whether the activity of CaO increases with increasing the ratio of Al 2 O 3 and CaF 2 can be determined by further research. The higher the activity of CaO is, the higher the oxygen ion concentration is [13].…”