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Abstract
The copper industry continuously uses great amounts of Cr-containing refractories, which are installed in all heating devices, despite their known negative environmental impact. The development of alternative materials seems feasible via replacing chromite spinel with other Cr-free spinel, using magnesia or alumina as a dominant component in the composition of new refractory. In light of the longstanding issue, the article presents the properties of key refractory raw materials (magnesia and alumina) and potential Cr-free spinels which can be combined to emerge a new generation of refractories dedicated to the copper industry. Subsequently, the results of FactSage corrosion simulations were revealed for Cr-refractories and seven Cr-free magnesia refractories containing spinels of different chemistry against industrial copper converter slag with Fe/SiO2 of 2.5. Through tracking the changes in solid and liquid phases appearing during interactions in a range of 1100-1400oC as well as liquid viscosity alterations the most prospective solutions have emerged by referring their properties to commercial MgO-Cr2O3 refractory.
Published Version
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