Method of producing artificial slags, artificial slags so obtained and their utilisation

摘要

1. Process for producing artificial slag, comprising the preparation of a charge containing at least, in a free or compounded state, lime, silica and alumina, and the complete melting of these charge at a temperature between 1400 and 1550 degrees C, the chemical composition of said charge being such that the molten artificiel slag contains at least 45 to 52% CaO, 15 to 22% Al2 O3 and 27 to 34% SiO2 with respect to the dry material and is able to vitrify after the melting, characterized in that the dry charge is brought to complete melting in a single vessel by a single heating step, within the mass, at a constant temperature, obtained by electrical way, the introduced charge having a granulometry lower than screen apertures of 5 mm.