A new type of multicomponent phase diagram for the evaluation of process parameters and operating conditions in non-ferrous pyrometallurgy.

The liquidus surface of multicomponent slags is an important parameter in non-ferrous smelting and converting which cannot be quantified by existing ternary liquidus diagrams; this surface is affected by multiple factors such as temperature, gaseous potentials and the content of each component in the slag. A thermodynamic model is used to deduce a new type of representation of this surface, a practical two-dimensional diagram which adequately describes the liquidus temperature of multicomponent slags and which can easily be used in the industry. The six-component FeO-Fe2O3-SiO2-CaO-MgO-Al2O3 slag system is the focus of the study.
The liquidus surface of multicomponent slags is an important parameter in non-ferrous smelting and converting which cannot be quantified by existing ternary liquidus diagrams; this surface is affected by multiple factors such as temperature, gaseous potentials and the content of each component in the slag. A thermodynamic model is used to deduce a new type of representation of this surface, a practical two-dimensional diagram which adequately describes the liquidus temperature of multicomponent slags and which can easily be used in the industry. The six-component FeO-Fe2O3-SiO2-CaO-MgO-Al2O3 slag system is the focus of the study.