Method and facility for continuous aeraulic separation of particulate materials consisting of a mixture of particles heterogeneous in both particle size and density

The invention concerns a method for continuous aeraulic separation of particulate materials consisting of a mixture of particles that is heterogeneous in both particle size and density, characterised in that it comprises the steps of grinding particles of materials, generating a gas stream conveying...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	MARECHAL, Jean-François, LEROY, Franck
Format:	Patent
Sprache:	eng
Schlagworte:	CRUSHING, PULVERISING, OR DISINTEGRATING CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLIDMATERIALS OR FLUIDS MILLING GRAIN PERFORMING OPERATIONS PREPARATORY TREATMENT OF GRAIN FOR MILLING SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATICTABLES OR JIGS SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATICTABLES OR JIGS TRANSPORTING
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Beschreibung
Zusammenfassung:	The invention concerns a method for continuous aeraulic separation of particulate materials consisting of a mixture of particles that is heterogeneous in both particle size and density, characterised in that it comprises the steps of grinding particles of materials, generating a gas stream conveying the ground particles, first aeraulic separation on the gas stream in order to separate the particles it contains into a first fraction consisting of the coarsest particles with variable densities and a second fraction consisting of the finest particles, second aeraulic separation on the first fraction in order to separate the particles that it contains into a third fraction consisting of the coarsest and/or most dense particles and a fourth fraction consisting of the least coarse and/or the least dense particles, re-injecting the third fraction or the fourth fraction at the inlet of the grinding, and simultaneous recovery of the second fraction as well as the fourth fraction or the third fraction, respectively, as output products.