Phase chemistry study of the interactions between slag and refractory in coppermaking processes

Mehrjardi, Ata Fallah, Hayes, Peter C., Azekenov, Turarbek, Ushkov, Leonid and Jak, Evgueni (2016). Phase chemistry study of the interactions between slag and refractory in coppermaking processes. In: Advances in Molten Slags, Fluxes, and Salts: Proceedings of the 10th International Conference on Molten Slags, Fluxes and Salts 2016. 10th International Conference on Molten Slags, Fluxes and Salts, MOLTEN 2016, Seattle, WA United States, (1071-1076). 22-25 May 2016. doi:10.1002/9781119333197.ch114


Author Mehrjardi, Ata Fallah
Hayes, Peter C.
Azekenov, Turarbek
Ushkov, Leonid
Jak, Evgueni
Title of paper Phase chemistry study of the interactions between slag and refractory in coppermaking processes
Conference name 10th International Conference on Molten Slags, Fluxes and Salts, MOLTEN 2016
Conference location Seattle, WA United States
Conference dates 22-25 May 2016
Proceedings title Advances in Molten Slags, Fluxes, and Salts: Proceedings of the 10th International Conference on Molten Slags, Fluxes and Salts 2016
Place of Publication Cham, Switzerland
Publisher Springer
Publication Year 2016
Sub-type Fully published paper
DOI 10.1002/9781119333197.ch114
Open Access Status Not yet assessed
ISBN 9783319486253
Start page 1071
End page 1076
Total pages 6
Abstract/Summary The molten oxides (slag), matte and metal charges during smelting, converting and refining stages of the pyrometallurgical coppermaking processes are contained in refractory-lined vessels. The refractory materials are selected so as to provide resistance to corrosion by molten phases and thermal insulation to minimize heat losses while maintaining the charge in a molten state. However, high process temperature, highly agitated and chemically aggressive melts in furnaces can result in rapid degradation of the refractory and premature shutdown of the reactor for relining; imposing additional costs on processes in the form of planned and unplanned maintenance. The focus of the present study is on detailed characterization of the phase chemistry and slag interactions with refractories. The rate of reactions between refractories and liquids depends on the phase equilibria. Post-mortem analysis of the spent brick from Isa smelter was followed by isothermal finger laboratory test under controlled conditions. Electron probe X-ray microanalysis (EPMA) is used to measure the compositions of the phases across the samples. This information is linked to the phase equilibria. Thermodynamic modelling is carried out by FactSage to assist in interpretation of the results. Phase analysis of used refractory and laboratory tests for Isa smelter indicate formation of a protective spinel layer on the hot face slowing refractory dissolution.
Keyword Copper
Hot face
Phase chemistry
Refractory
Slag
Q-Index Code E1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Conference Paper
Collections: School of Chemical Engineering Publications
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