Experimental investigation of the roasting behaviour and phase transformations in a zinc sulfide concentrate
Wen X. Chen J. Ng M. Ushkov L.A. Jak E.
1 February 2026Elsevier B.V.
Powder Technology
2026#469
The present study investigates the proportion of phases in zinc calcines produced by statically roasting zinc sulfide concentrate at temperatures between 600 and 950 °C and varying roasting times. Utilizing an integrated analytical approach combining Electron Probe X-ray Microanalysis (EPMA) with Wavelength Dispersive Spectroscopy (WDS) and Automated Mineralogy Analysis (AMA), AMICS, with Energy Dispersive Spectroscopy (EDS), a comprehensive mineralogical database suitable for the characterisation of zinc sulfide concentrate and calcines was developed. The present study addresses limitations of traditional characterisation methods by providing detailed, quantitative insights into the calcine structure, focusing on the proportion of key phases such as zincite, spinel (zinc ferrite), willemite (zinc silicates), and residual silicates/sulfides. The zincite content of the calcines displayed a non-linear relationship with temperature, peaking between 750 and 850 °C; lower roasting temperatures led to greater formation of the zinc ferrite phase, while higher temperatures led to greater formation of the zinc silicate phase, which have negative consequences for the leaching and leachate separation processes respectively. This work provides crucial understanding for optimizing zinc processing conditions by detailing the factors influencing zinc ferrite and silicate formation.
Analytical techniques , Process mineralogy , Pyrometallurgy , Zinc calcine , Zinc sulfide concentrate
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Pyrometallurgy Innovation Centre (PYROSEARCH), School of Chemical Engineering, The University of Queensland, Brisbane, 4072, QLD, Australia
NewSpec Pty Ltd, Adelaide, 5064, SA, Australia
Kazzinc, Ust-Kamenogorsk (Oskemen), 070002, Kazakhstan
Centre for Microscopy and Microanalysis (CMM), The University of Queensland, Brisbane, 4072, QLD, Australia
Pyrometallurgy Innovation Centre (PYROSEARCH)
NewSpec Pty Ltd
Kazzinc
Centre for Microscopy and Microanalysis (CMM)
10 лет помогаем публиковать статьи Международный издатель
Книга Публикация научной статьи Волощук 2026 Book Publication of a scientific article 2026