Separation mechanism of tennantite and chalcopyrite with flotation after oxidation using oxygen

Himawan T.B.M. Petrus, Tsuyoshi Hirajima, Keiko Sasaki, Hideyuki Okamoto

Research output: Contribution to conferencePaper

Abstract

Flotation of arseno bearing minerals from their copper ore has been an interest due to the increasing awareness on protecting the environment by minimizing the possibility of exposed arsenic compound. Some approaches have been proposed, but the mechanisms of separations have not yet fully understood. In this study, oxidation using oxygen was applied. Instead of the complex copper ore flotation results, pure single mineral of tennantite and chalcopyrite foatability was conducted using Hallimond tube. Resembled with the flotation results of copper concentrate containing tennantite, the separation possessed the best result at alkaline condition (pH 11) at where the arsenic content was reduced from 3300 ppm to 1800 ppm. In order to be able to understand the mechanism of the separation atomic force microscope (AFM) was utilized. AFM images showed changes in morphology and behavior when minerals were treated in both acid and alkaline condition. It was found that the morphological change showed the reaction products representing the rate of reactivity of tennantite and chalcopyrite. From the measured force of adhesion, it can be observed that in alkaline condition the surface of both minerals is more hydrophilic than that in acidic condition possessing higher value. This is in accordance with the X-ray photoelectron spectroscopy (XPS) spectra in which hydroxide moieties occupied the mineral surface in alkaline condition while elemental sulfur is in acidic condition.

Original languageEnglish
Publication statusPublished - Jan 1 2014
Event27th International Mineral Processing Congress, IMPC 2014 - Santiago, Chile
Duration: Oct 20 2014Oct 24 2014

Other

Other27th International Mineral Processing Congress, IMPC 2014
CountryChile
CitySantiago
Period10/20/1410/24/14

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All Science Journal Classification (ASJC) codes

  • Earth-Surface Processes
  • Geochemistry and Petrology
  • Geotechnical Engineering and Engineering Geology
  • Mechanical Engineering

Cite this

Petrus, H. T. B. M., Hirajima, T., Sasaki, K., & Okamoto, H. (2014). Separation mechanism of tennantite and chalcopyrite with flotation after oxidation using oxygen. Paper presented at 27th International Mineral Processing Congress, IMPC 2014, Santiago, Chile.