Article | REF: J3132 V1

Hydraulic classification in dimensions

Authors: Pierre BLAZY, Robert JOUSSEMET

Publication date: March 10, 2011

You do not have access to this resource.
Click here to request your free trial access!

Already subscribed? Log in!


Overview

Français

ABSTRACT

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.

Read this article from a comprehensive knowledge base, updated and supplemented with articles reviewed by scientific committees.

Read the article

AUTHORS

  • Pierre BLAZY: Honorary Professor - Former Director, École nationale supérieure de géologie

  • 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 [J 3 131] separates particles larger than a hundred micrometers, the separation of fine particles (< 100 μm) requires the centrifugal force described in this dossier [J 3 132].

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 [J 3 131] file.

You do not have access to this resource.

Exclusive to subscribers. 97% yet to be discovered!

You do not have access to this resource.
Click here to request your free trial access!

Already subscribed? Log in!


The Ultimate Scientific and Technical Reference

A Comprehensive Knowledge Base, with over 1,200 authors and 100 scientific advisors
+ More than 10,000 articles and 1,000 how-to sheets, over 800 new or updated articles every year
From design to prototyping, right through to industrialization, the reference for securing the development of your industrial projects

This article is included in

Unit operations. Chemical reaction engineering

This offer includes:

Knowledge Base

Updated and enriched with articles validated by our scientific committees

Services

A set of exclusive tools to complement the resources

Practical Path

Operational and didactic, to guarantee the acquisition of transversal skills

Doc & Quiz

Interactive articles with quizzes, for constructive reading

Subscribe now!

Ongoing reading
Dimensional hydraulic classification