Overview
FrançaisABSTRACT
Sedimentation allows for the separation of particles above 100 micrometers. However, the separation of fine particles below this size must be performed by centrifugal force. Hydrocyclones are static devices of a cylindro-conical or cylindrical shape, in which the mineral pulp is injected tangentially under pressure. The elements of the pulp thus undergo centrifugation. Coarse particles move towards the wall of the cyclone whereas fine particles remain in the central zone of the device. Fine particle size cuts are generally comprised between several hundreds and several tens of microns.
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Read the articleAUTHORS
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Pierre BLAZY: Honorary Professor - Former Director, École nationale supérieure de géologie
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Robert JOUSSEMET: Engineer from the École nationale supérieure de géologie - Research engineer at the French National Center for Scientific Research (CNRS) - Head of the STEVAL test station at the environment and mineralurgy laboratory (LEM – UMR 7569)
INTRODUCTION
While the sedimentation classification described in the previous dossier
Hydrocyclones are static cylindrical-conical or cylindrical devices into which mineral pulp is injected tangentially under pressure. In this way, the pulp components are centrifuged. Coarse particles move towards the cyclone wall, while fine particles remain in the central zone of the device. Typical particle size ranges from a few hundred to a few tens of micrometers.
Centrifuges consist of a rotor rotating at high speed, into which the pulp is injected. The coarser particles move towards the rotor wall, while the finer particles remain in the central zone. Typical particle size ranges from a few dozen to a few micrometers.
For symbols and notations, please refer to the table at the beginning of the
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Unit operations. Chemical reaction engineering
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Suppliers – Manufacturers (non-exhaustive list)
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Hydrocyclones
AKW apparate http://www.akwauv.com
Amberger Kaolinwerke Eduard Kick GmbH & Co. KG http://www.akw-kaolin.com
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