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Copper tailings filtration: Influence of filter cake desaturation

Fränkle, Bernd 1; Sok, Thien ; Gleiß, Marco 2; Nirschl, Hermann 2
1 Institut für Mechanische Verfahrenstechnik und Mechanik (MVM), Karlsruher Institut für Technologie (KIT)
2 Karlsruher Institut für Technologie (KIT)

Abstract:

Copper mining produces immense amounts of tailings due to low ore grades. These residues are increasingly dewatered by filtration in recessed plate filter presses to ensure safer storage and high recovery of water. The process parameters filtration pressure, desaturation time, desaturation pressure and cake thickness have a significant influence on achieving water content as well as bulk material stability specifications and maintaining operation performance, especially with regard to cake detachment. In this study, copper tailings filtration tests in a laboratory filter press and directly connected measurements of cake-to-fabric shear adhesion as well as filter cake shear cohesion were carried out. It is shown that optimization of cake properties with regard to residual water content, suitability for detachment and bulk material stability by specific adjustment of the filtration and post-treatment parameters is possible. Furthermore, implementation of a mathematical model allows water content, cake saturation, cake-to-fabric shear adhesion and cake shear strength prediction dependent on filter cake desaturation time and pressure for tailings filtration applications in recessed plate filter presses.


Verlagsausgabe §
DOI: 10.5445/IR/1000175699
Veröffentlicht am 28.10.2024
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Mechanische Verfahrenstechnik und Mechanik (MVM)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 10.2024
Sprache Englisch
Identifikator ISSN: 0892-6875
KITopen-ID: 1000175699
Erschienen in Minerals Engineering
Verlag Elsevier
Band 217
Seiten Art.-Nr.: 108952
Vorab online veröffentlicht am 03.09.2024
Nachgewiesen in Web of Science
Dimensions
Scopus
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