Journal of Siberian Federal University. Engineering & Technologies / Dependence of the Structure of Copper Anodes on the Composition of Non- Stick Coatings and the Method of Their Application. Part I

Full text (.pdf)
Issue
Journal of Siberian Federal University. Engineering & Technologies. 2024 17 (6)
Authors
Borodin, Andrey D.; Krupnov, Leonid V.; Vaniukova, Natalia D.
Contact information
Borodin, Andrey D. : Fedorovsky Polar State University Norilsk, Russian Federation; ; Krupnov, Leonid V.: Fedorovsky Polar State University Norilsk, Russian Federation; Vaniukova, Natalia D. : Fedorovsky Polar State University Norilsk, Russian Federation
Keywords
carbon; fire refining; anode copper; casting; mold; non- stick coatings; chamotte mortar; synthetic anhydrite; neutralization of sulfuric acid
Abstract

The article presents the results of studies to identify the dependence of the chemical composition, internal and external structure of copper anodes obtained in laboratory conditions on the thickness and nature of non-stick coatings applied to the surface of the mold. Copper anodes are obtained by casting anode copper into molds that have been treated with a release non- stick coating having different layer thicknesses (0.1 mm, 0.5 mm, 1.0 mm) and mixture composition. Chamotte mortar, «Lithoform» grade 900, Carbon Black and Synthetic anhydrite were selected as the initial components of non-stick coatings. The composition of the cast anodes was determined by electron microscopy and micro-X-ray spectral analysis. Electron microscopic studies were carried out on a Tescan Vega III SBH scanning electron microscope with an integrated Oxford X-Act microanalysis system and the use of auxiliary equipment (carbon sputtering station – Q150R Quorum Technologies Ltd). The work included a set of studies of the internal structure of copper castings with the determination of the local chemical composition. Based on the research results, it was found that the most effective of the experimental compositions are a mixture of synthetic anhydrite with carbon in a 50/50 ratio and pure synthetic anhydrite. The work shows that pure anhydrite is at the same level in terms of impurity collection and casting quality as chamotte mortar, so this coating is recommended for use in the technology of casting anode copper. This allows simultaneously solving the problem of recycling excess sulfuric acid at the enterprise «Nadezhda Metallurgical Plant named after B. I. Kolesnikov» ZB PJSC “MMC Norilsk Nickel”

Pages
723–738
EDN
UCGIHM
Paper at repository of SibFU
https://elib.sfu-kras.ru/handle/2311/153855

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