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Talc has found a steadily increasing number of uses such as cosmetics, steatite and cordierite ceramics,for pitch control in the paper industry and as a reinforcing filler in rubber, etc. In this research,the amenability of some Egyptian carboniferous finely disseminated talc ores to beneficiationby flotation was investigated on laboratory scale. The original talc sample is characterized bylow MgO content 25.40%, low SiO2 45.71%, high CaO content 6.32% and high L.O.I. 11.35%,indicating its low grade. Attrition scrubbing of the crushed ores was found to be an unconventionalprocess, not only for fine talc production, but also for proper separation of the harder carbonaceousgangue. Talc pre-concentrates, less than 0.074 μm, were prepared by attrition scrubbing inthe laboratory having 8.40% L.O.I. with a yield reaching 74.70%. Cleaner talc concentrate withL.O.I. content averaging 6.70% was obtained by flotation in the presence of Aerofroth 71 with ayield reaching 64.71%. This was relatively improved by the use of a selective quaternary aminetalc collector and in presence of a selective carbonate depressant soda ash. Flotation of the fineground talc less than 22 μm produced a talc concentrate assaying 6.90% L.O.I. with a yield recoveryof 62.91%. However, different talc concentrates obtained by just natural floatability or bythe use of small dose of Aerofroth 71, or by the application of quaternary amine in presence ofcarbonate depressant, satisfy the requirement of paper coating, ceramics production, functionalfiller, and pharmaceuticals applications. Tailings could also be used in carpets, roofs, and tilesproduction industries.


Flotation, Depression, Attrition Scrubbing, Carbonate Separation

Cite this paper

Boulos, T.R., Ibrahim, S.S. and Yehia, A. 2016 The Art of Talc Flotation for Different Industrial Applications. Journal of Minerals and Materials Characterization and Engineering, 4, 218-227. doi: 10.4236-jmmce.2016.43020.

Autor: Tawfik Refaat Boulos, Suzan Sami Ibrahim, Ahmed Yehia



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