Enrichment of placer gold ore through Knelson concentrator optimization

Çerik Ç., Akar Şen G., Şen S.

GOLD BULLETIN, vol.1, no.1, pp.1-12, 2024 (SCI-Expanded)

  • Publication Type: Article / Article
  • Volume: 1 Issue: 1
  • Publication Date: 2024
  • Doi Number: 10.1007/s13404-024-00352-8
  • Journal Name: GOLD BULLETIN
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Aerospace Database, Communication Abstracts, Compendex, Metadex, Civil Engineering Abstracts
  • Page Numbers: pp.1-12
  • Dokuz Eylül University Affiliated: Yes

Abstract

This study investigates the optimization of placer gold ore processing using a laboratory-scale Knelson concentrator through response surface methodology (RSM) and Box-Behnken experimental design. Fifteen experiments were conducted to assess the efects of three parameters: solid concentration (wt.%), G force (G), and fuidization water fow rate (l/min), on gold grade and recovery. Statistical analyses using Design Expert 13 revealed signifcant quadratic regression equations for both gold grade and recovery, with high coefcients of determination. The empirical models demonstrated the intricate relationships between the concentrator parameters and process responses. Interpretation of the equations revealed that increasing the solid concentration positively infuenced gold grade and recovery, while higher G force and fuidization water fow rate negatively impacted these parameters. Moreover, synergistic efects were observed between certain parameter pairs, indicating the complex interplay of factors infuencing gold concentration and extraction efciency. The study highlights the importance of understanding the separation mechanisms within the Knelson concentrator, especially in the presence of flaky gold particles alongside spherical particles. Insights gained from this research provide valuable guidance for optimizing placer gold ore processing operations, ultimately enhancing efciency and sustainability in mineral processing practices.