What is it about?
In this experimental work empirical relations between the slag composition and the dissolution of chromite and the effect of different degrees of reducing conditions were established by using a statistical model. With this, a large amount of information in regard to the effect of slag composition on the dissolution of chromite was made available over a large range of slag compositions for practical applications.
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Why is it important?
Ferrochromium is currently produced predominantly by the smelting of chromite ore in submerged-arc electric furnaces. The economics of the process largely depends on the grade and melting behaviour of the ore and the slag properties. Previous studies indicate that the chromium in the discard slags is mainly in the form of undissolved chrome ore and metal droplets. Information on the dissolution behaviour of chromite ore in liquid slags is necessary in minimising the Cr losses to slag towards a more economically feasible process, or even towards making possible that low-grade chrome ores can be used to produce a saleable ferrochrome metal.
Perspectives
The number of studies with chromite in molten slags is limited. Therefore, this work is believed to make an important contribution in understanding the dissolution behaviour of chromite in a wide range of slag compositions at temperatures representative of that of high-carbon ferrochrome production and stainless steel making.
Professor Rauf Hurman Eric
University of the Witwatersrandd
Read the Original
This page is a summary of: Dissolution of chromite in slags, Mineral Processing and Extractive Metallurgy Transactions of the Institutions of Mining and Metallurgy Section C, December 2013, SAGE Publications,
DOI: 10.1179/0371955313z.00000000063.
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