MATERIALS TRANSACTIONS
Online ISSN : 1347-5320
Print ISSN : 1345-9678
ISSN-L : 1345-9678
Characterisation of the Effect of Al2O3 on the Liquidus Temperatures of Copper Cleaning Furnace Slags Using Experimental and Modelling Approach
Taufiq HidayatPeter C. HayesEvgueni Jak
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2019 Volume 60 Issue 7 Pages 1377-1383

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Abstract

Most metallurgical smelting processes operate over a limited range of compositions and temperatures but generally, even with complex slag systems, within a given primary phase field. Knowledge of the sensitivity of the liquidus to changes in composition enables improved temperature control and stability of operation. The paper describes a general approach that was used to characterize the liquidus temperatures of the “Cu2O”–“FeO”–SiO2–Al2O3 slags in an electric slag cleaning furnace operation as function of the principal chemical components using a combination of available computer based thermodynamic database descriptions of complex slags and targeted series of laboratory experiments. An approximate mathematical relationship, valid for a limited range of compositions and temperatures, has been developed describing the liquidus temperature of the slags as a function Fe/SiO2 ratio, Cu, and Al2O3 concentrations in slag.

Fig. 9 Effect of Al2O3 in bulk on the mass%solid as function of Cu in bulk at fixed temperature = 1200°C and Fe/SiO2 ratio in the bulk = 1.5 mass/mass as predicted by the polynomial equation obtained in the present study. Fullsize Image
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© 2019 The Japan Institute of Metals and Materials
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