Per: Thiago durante (Instituto federal do espirito santo (IFES)), José roberto de oliveira (INSTITUTO FEDERAL DO ESPIRITO SANTO (IFES)), anna paula littig berger (INSTITUTO FEDERAL DO ESPIRITO SANTO (IFES))
Abstract:
This paper carried out a comparative study, in which, seven laboratory produced slags and fourteen industrial slags were analyzed based on its compositions and Factsage 7.0 results, in order to measure the most advantageous foaming conditions both in relation to the properties and composition. From the laboratory slags, the best foaming condition were observed with a composition of 8% FeO 22% MgO, and properties of 12% of precipitated phases, a ternary basicity of 1.2 to 1.4. viscosity at about 0.5 Poise and foaming index closer to 12,31s. The industrial slags did not showed values within these parameters, however, with the analysis, it was possible to identify that there are vast compositions combinations that will provide an optimized process, and all related to the following improvements: reducing the FeO levels, aiming at superior race yields and higher viscosity of foaming slags; Increase of MgO contents pursuing saturation and to provide precipitated second phases; Increase the yield of the carbon reactions, reducing its additions.