Technical note on the development of a new attachment timer for predicting the change in ore floatability

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Mineral floatability is a function of mineral properties such as size, liberation, shape, surface composition, reagent coverage on the surface, level of oxidation on the surface, etc.; pulp chemistry: Eh, pH, temperature, DO, reagent type, etc. and hydrodynamic conditions: turbulence, gas dispersion, D32, etc. The biggest challenge with predicting the floatability of an ore is finding a measurement method that would take into account the effect of all of the variables on the floatability of the minerals. The particle-bubble attachment time measurement is considered as an alternative way to predict the floatability of minerals instead of using expensive and time consuming flotation tests because it takes into considerations both surface chemistry and hydrodynamic parameters present in the froth flotation. The existing particle-bubble attachment time method is suitable for studying some significant flotation variables such as pH, temperature, particle size, reagent type and concentration. Nevertheless, measuring the attachment time as a function of collector coverage or surface oxidation is much more challenging. This paper introduces a new induction timer designed to measure the effect of galvanic interaction on the attachment time of particles. The new setup employs an array of needles to create 6 bubbles with the average size of 2.1 mm. Imaging system is used to set the initial distance between the particle bed and the array of bubbles. The attached particles are collected and sent for further analysis. One of the main benefits of the new experimental setup is that the attached particles can be physically separated from the unattached particles therefore many of the particle properties can be analysed and evaluated.
Original languageEnglish
Title of host publicationXXVIII International Mineral Processing Congress Conference Proceedings
PublisherCanadian Institute of Mining, Metallurgy and Petroleum
ISBN (Electronic)978-1-926872-29-2
Publication statusPublished - 11 Sept 2016
MoE publication typeA4 Conference publication
EventInternational Mineral Processing Congress - Quebec City Convention Center, Quebec City, Canada
Duration: 11 Sept 201615 Sept 2016
Conference number: 27


ConferenceInternational Mineral Processing Congress
Abbreviated titleIMPC
CityQuebec City
Internet address


  • Bubble-particle attachment
  • induction time
  • attachment time
  • flotation


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