EUROPEAN CONGRESS AND EXHIBITION ON ADVANCED MATERIALS AND PROCESSES - EUROMAT 2021

Electrometallurgical extraction of metals is becoming increasingly important in the course of higher availability of renewable electricity. Submerged Arc Furnaces use the electrical resistance of the slag produced during the reduction process as their heating medium. The higher the output, which normally goes up to 100 MW today, as more complex is the control technology as more important it is to know the specific electrical resistances of the slag at operating temperatures. Extensive studies of electrical conductivity, the inverse value of the resistance, over a wide temperature range were carried out and evaluated for slags of the type FeO-CaO-SiO2, which are particularly generated in ferronickel extraction, but also in other processes. The results of this work and the relevance for the electromechanical dimensioning of electric furnaces are presented.