Obtaining of High Quality Iron Oxide from Nitric Acid Leaching Solution

Abstract:

Low grade copper concentrate is a promising source for the future recovery of copper and other valuable components by nitric acid leaching, which leads to a formation of iron rich pregnant solution. In this study a method of producing of high-quality iron oxide from the pregnant solution by precipitation of jarosite with subsequent conversion of jarosite into magnetite under alkaline conditions in the presence of ferrous ions was explored. The degree of iron extraction was 87.4%, the copper content in the magnetite was 0.06% under the following optimal conditions of jarosite precipitation: precipitation time 6 h, initial pH 1.5, seed amount 60 g/L. However, to obtain this purity, the copper content in the pregnant solution should be less than 0.5 g/L, and as a seed, it is necessary to use a well-crystallized jarosite with a low content of impurities.

• Periodical: Solid State Phenomena (Volume 299)
• Pages: 1128-1133
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.299.1128
• Online since: January 2020
• Authors: Andrey A. Shoppert*, Denis A. Rogozhnikov, Y.E. Agapitov
• Keywords: Copper Concentrate, Iron Recovery, Jarosite Precipitation, Magnetite Concentrate, Nitric Acid Leaching

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