Current studentsExisting staffContact us
 

Real-time bulk-density monitoring for rotary air concentration used in alluvial gold mining

Simple item page
dc.contributor.authorTang, D.
dc.contributor.authorYang, L.
dc.contributor.authorChen, L.
dc.contributor.authorAsamoah, R.K.
dc.contributor.authorHu, E.
dc.date.issued2026
dc.descriptionLink to a related website: https://orcid.org/0000-0002-6871-6027, ORCID profile - Asamoah, Richmond Komla
dc.description.abstractAlluvial gold mining entails extracting gold from sedimentary deposits in current and ancient riverbeds. It is widely regarded as the most eco-friendly approach to gold mining due to its minimised environmental footprint compared to underground and open-pit mining. Rotary air concentration (RAC), a novel classification method seen in this field, physically separates dense gold-bearing particles from low-density gangue materials, where particle density is the dominant factor distinguishing concentrates from tails, rather than particle size. However, the dry-processing nature of air classification and high-intensity feature of the concentrates discharge impose significant challenges in gauging particle density in real-time and there is a lack of costeffective commercial equipment in this regard, specifically for optimal closed-loop feedback control. This study resolves the problem with a new technique on the basis of vibration measurement. A prototype consisting of a mechanical probe and an accelerometer has been designed and built for inline installation along the RAC concentrates stream. Procedures to process vibration data in frequency domain are proposed. Laboratory experiments using samples from an Australian alluvial gold deposit have proven the proposed approach effective in monitoring bulk-density variation of RAC-classified concentrates stream in real-time.
dc.identifier.citationPowder Technology, 2026; 469(121865):1-8
dc.identifier.doi10.1016/j.powtec.2025.121865
dc.identifier.issn0032-5910
dc.identifier.issn1873-328X
dc.identifier.orcidTang, D. [0000-0002-7143-0441]
dc.identifier.orcidChen, L. [0000-0002-2269-2912]
dc.identifier.orcidAsamoah, R.K. [0000-0002-6871-6027]
dc.identifier.orcidHu, E. [0000-0002-7390-0961]
dc.identifier.urihttps://hdl.handle.net/11541.2/45398
dc.language.isoen
dc.publisherElsevier
dc.rightsCopyright 2026 The author(s) (https://creativecommons.org/licenses/by/4.0/) Access Condition Notes: This is an open access article
dc.source.urihttps://doi.org/10.1016/j.powtec.2025.121865
dc.subjectalluvial gold
dc.subjectrotary air concentration
dc.subjectparticle density
dc.subjectonline
dc.subjectinline
dc.subjectin-stream
dc.subjectreal-time
dc.titleReal-time bulk-density monitoring for rotary air concentration used in alluvial gold mining
dc.typeJournal article
pubs.publication-statusPublished
ror.fileinfo12309667130001831 13309667120001831 Open Access Published Version
ror.mmsid9917087548601831

Files

Original bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
9917087548601831_12309667130001831_Real-time bulk-density.pdf
Size:
3.39 MB
Format:
Adobe Portable Document Format
Description:
Published version
Download

Collections