Froth properties and ist effect on lab-scale flotation of carbonaceous sedimentary apatite ore


Froth properties and ist effect on lab-scale flotation of carbonaceous sedimentary apatite ore

Hoang, D. H.; Kupka, N.; Peuker, U. A.; Rudolph, M.

The froth ability, froth stability and the froth structure are strong influences in flotation process i.e. on
water recovery, bubble size, entrainment of gangue particle, flotation rate constants, grade and recovery. The labscale
flotation of rich apatite ore with a high mass pull leads to significant changes in pulp and froth properties over
time. The froth stability decreases with increasing the flotation time. These changes can be related to different solid contents, reagent concentration, froth heights and bubble size distributions. This study presents the results from froth studies and discussions on the particle size of fully liberated silicates and degree of entrainment based on automated mineralogy size-by-size analysis. The change of entrainment in a rich apatite ore batch flotation with time will describe more precisely by measuring froth properties using a Dynamic Foam Analyzer. It is concluded that the degree of entrainment is not only dependent on particle size but also the pulp density due to its effect on particle settling and also froth properties in varying resistance to particle drainage. Furthermore, entrainment models are applied to predict the effect of size, flotation time on entrainment.

Keywords: Froth properties; apatite flotation; Entrainment; automated mineralogy

  • Contribution to proceedings
    29th International Mineral Processing Congress, IMPC 2018, 17.-21.09.2018, Moscow, Russia
    Conference Proceeding: Canadian Institute of Mining, Metallurgy and Petro, 978-703022711-9, 1748-1757

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