Water quality effects on flotation: Impacts and control of residual xanthates

Ishamael Muzinda*, Nóra Schreithofer

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

31 Citations (Scopus)
405 Downloads (Pure)


For increasing the sustainability and cost effectiveness of their operations Boliden Kevitsa Mining Oy in collaboration with academic research partners aims to develop a holistic approach to water management in its mineral processing operation. This paper describes one of the first steps taken in this process, namely the monitoring and control of residual collectors in their flotation circuits. Boliden Kevitsa Mining Oy, a Cu-Ni-PGE concentrator recycles 90–95% of its water for use in the plant. The quality of recycled water tends to deteriorate as various elements and compounds such as Ca, Na, Mg, K, SO4 2− and residual reagents accumulate. The accumulation shows seasonal cyclic variation that has an impact on flotation performance. UV/VIS Spectrophotometry was employed to measure residual xanthates in key process streams and process return water from the Tailings Storage Facility. This allowed the implementation of dosage monitoring and control strategy with the objective of performance control and optimization throughout the seasonal changes during the year.

Original languageEnglish
Pages (from-to)34-41
Number of pages8
JournalMinerals Engineering
Publication statusPublished - 15 Aug 2018
MoE publication typeA1 Journal article-refereed


  • Dosage monitoring
  • Flotation performance
  • Monitoring and control
  • Process return water
  • Residual collectors
  • UV/VIS Spectrophotometry
  • Water management
  • Water quality


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