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Process mineralogy as a key factor affecting the flotation kinetics of copper sulfide minerals

  • Ataallah Bahrami
  • Mirsaleh Mirmohammadi
  • Yousef GhorbaniEmail author
  • Fatemeh Kazemi
  • Morteza Abdollahi
  • Abolfazl Danesh
Open Access
Article
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Abstract

The aim of this study is to apply process mineralogy as a practical tool for further understanding and predicting the flotation kinetics of the copper sulfide minerals. The minerals’ composition and association, grain distribution, and liberation within the ore samples were analyzed in the feed, concentrate, and the tailings of the flotation processes with two pulp densities of 25wt% and 30wt%. The major copper-bearing minerals identified by microscopic analysis of the concentrate samples included chalcopyrite (56.2wt%), chalcocite (29.1wt%), covellite (6.4wt%), and bornite (4.7wt%). Pyrite was the main sulfide gangue mineral (3.6wt%) in the concentrates. A 95% degree of liberation with d80 > 80 µm was obtained for chalcopyrite as the main copper mineral in the ore sample. The recovery rate and the grade in the concentrates were enhanced with increasing chalcopyrite particle size. Chalcopyrite particles with a d80 of approximately 100 µm were recovered at the early stages of the flotation process. The kinetic studies showed that the kinetic second-order rectangular distribution model perfectly fit the flotation test data. Characterization of the kinetic parameters indicated that the optimum granulation distribution range for achieving a maximum flotation rate for chalcopyrite particles was between the sizes 50 and 55 µm.

Keywords

microscopic analysis flotation kinetics second order rectangular distribution model sulphide minerals 

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Copyright information

© The Author(s) 2019

Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits use, duplication, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

Authors and Affiliations

  • Ataallah Bahrami
    • 1
  • Mirsaleh Mirmohammadi
    • 2
  • Yousef Ghorbani
    • 3
    Email author
  • Fatemeh Kazemi
    • 1
  • Morteza Abdollahi
    • 1
  • Abolfazl Danesh
    • 4
  1. 1.Department of Mining EngineeringUrmia UniversityUrmiaIran
  2. 2.School of Mining Engineering, College of EngineeringUniversity of TehranTehranIran
  3. 3.Department of Civil, Environmental & Natural Resources EngineeringLuleå University of TechnologyLuleåSweden
  4. 4.Complex of Copper Processing-Sungun, East Azerbaijan ProvinceTabrizIran

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