Investigation of Liquidus Area and Fluidity of Oxides Affecting Stable Operation of Melting Furnace

Since high social demands have been focused on detoxification as well as recycling of industrial wastes, the role of melting furnaces for wastes has been highlighted these days. However, due to scattering of compositions of components in industrial wastes, we are required to operate melting furnaces stably and to elucidate adequate operating conditions even for some compounds which are difficult to be melted under usual operations. In the present paper, we investigated 1) phase equilibria by thermodynamic databases, and 2) fluidity of molten slag for several compounds provided in melting furnaces. Then, we found that beneficial information was available on composition and temperature ranges of molten slag by thermodynamic investigation, which could provide useful guide to melt even asbestos and high-melting point compounds.