Use of the attainable region method to optimise a milling and leaching process

N. Hlabangana, G. Danha, D. Hildebrandt, D. Glasser

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In this work, we apply a method known as the attainable region (AR) technique in order to optimize the milling and leaching process of a low grade gold ore. No work on the application of the AR optimization technique has been done yet on a joint milling and leaching process. The advantage of the AR approach lies in its ability to simplify the optimization problem, as searching over a defined set for the maximum of an objective function is a fairly standard procedure. The objective function we selected was that of optimizing a linear function of the value of the recovered material minus the cost of both milling and leaching. Using the three variables (milling time, leaching time and recovery), we constructed a 3D plot and used it to obtain all the possible recoveries from the different milling and leaching times. The optimum for our chosen objective was then found by overlaying a contour plot of the objective function on the 3D plot. Our results show that the optimum was obtained at 90 % recovery with a profit value of 600, milling time of 30 minutes and leaching time of 1750 minutes.

Original languageEnglish
Title of host publicationIMPC 2016 - 28th International Mineral Processing Congress
PublisherCanadian Institute of Mining, Metallurgy and Petroleum
ISBN (Electronic)9781926872292
Publication statusPublished - 2016
Externally publishedYes
Event28th International Mineral Processing Congress, IMPC 2016 - Quebec City, Canada
Duration: Sep 11 2016Sep 15 2016

Publication series

NameIMPC 2016 - 28th International Mineral Processing Congress
Volume2016-September

Conference

Conference28th International Mineral Processing Congress, IMPC 2016
CountryCanada
CityQuebec City
Period9/11/169/15/16

All Science Journal Classification (ASJC) codes

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

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  • Cite this

    Hlabangana, N., Danha, G., Hildebrandt, D., & Glasser, D. (2016). Use of the attainable region method to optimise a milling and leaching process. In IMPC 2016 - 28th International Mineral Processing Congress (IMPC 2016 - 28th International Mineral Processing Congress; Vol. 2016-September). Canadian Institute of Mining, Metallurgy and Petroleum.