Abstract SYMPHOS 2011

De par ses activités dans le secteur minier au Québec et en Ontario, ASDR dispose d’une large expérience et d’une
grande expertise dans le domaine particulier du traitement des boues générées par les activités d’exploration et/
ou de traitement de la roche brute. Lors de ces projets, ASDR a mis en œuvre différentes solutions d’essorage actives
et passives, combinées ou non, de boues minières qui permettent d’atteindre des niveaux de siccité élevés et de
récupérer une eau potentiellement réutilisable. Certaines de ces solutions pourraient être répliquées avec succès
par les entreprises minières dans le secteur des phosphates. Au travers de cette communication orale, ASDR va
tenter de donner un aperçu de ses expériences passées et des solutions envisagées.
APPLICATION OF THE FLSMIDTH DEEP CONE THICKENING TECHNOLOGY
TO THE PHOSPHATE AND FERTILIZER INDUSTRY
Liam Macnamara – Minerals sales director EMEA – FLSmidth
Mark Niederhauser – Sedimentation and Paste Technology Manager
Lee Condrey – Southern USA Sales Manager - FLSmidth
Jean Claude Serbon – Minerals Area Sales Manager - FLSmidth
After reviewing the historical development and describing the general principles of the FLSmidth Deep Cone
thickening technology, the authors mention various applications and more particularly applications around the
Phosphate and fertilizer industry developed in the recent years.
A specific case study regarding the Deep Cone installed at Pakistan Maroc Phosphore Fertilizer unit at Jorf Lasfar is
surveyed and illustrates the benefice of this technology in the Fertilizer Process, with emphasis on water recovery.
Dr. Nadim F. Fuleihan,
Sc.D., P.E
Ardaman & Associates, Inc., Orlando, Florida, USA
A Tetra Tech Company
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PHOSPHOGYPSUM DISPOSAL---PROS AND CONS OF WET VS. DRY STACKING
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There are a number of factors that an operator should consider before pursuing wet or dry stacking of the
phosphogypsum by-product from a phosphoric acid plant. In addition to process considerations, important factors
include the climatologic regime, water balance considerations, hydrogeology, topography, capital cost, operating
cost (and maintenance), closure costs (and handling of pore water), availability (or scarcity) of a fresh water source,
distance from the plant to the disposal site (and viability of dry versus wet transport methods), P2O5 recovery,
impacts on the environment (from leakage, dusting, accidental spills, etc.) and applicable regulations.
A review of dry/wet transport methods and dry/wet disposal methods is presented using illustrative examples
from various countries worldwide, with particular emphasis on the advantages and disadvantages of wet and dry
stacking in the various environments.
The author wishes to acknowledge the invaluable contributions of his former colleague and mentor, the late Dr.
Anwar E. Z. Wissa, who contributed since the early seventies to improving our understanding of this important
topic.
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