TREATMENT OF MINERAL PARTICLES

A method of heat treating kaolin particles which includes the steps of establishing in a furnace a heating zone suitable to calcine the particles and passing the particles rapidly through the heating zone whereby the particles are flash calcined in the heating zone, wherein the furnace is of the kin...

Ausführliche Beschreibung

Gespeichert in:

Bibliographische Detailangaben
1. Verfasser:	KOSTUCH, JACEK, ANTONI
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	ADHESIVES ARTIFICIAL STONE CEMENTS CERAMICS CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMICAL PAINT OR INK REMOVERS CHEMISTRY COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS COMPOSITIONS BASED THEREON COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS COMPOUNDS THEREOF CONCRETE CORRECTING FLUIDS DYES FILLING PASTES IMPREGNATING OR COATING OF PAPER INKS INORGANIC CHEMISTRY LIME, MAGNESIA MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS NON-METALLIC ELEMENTS ORGANIC MACROMOLECULAR COMPOUNDS PAINTS PAPER NOT OTHERWISE PROVIDED FOR PAPER-MAKING PASTES OR SOLIDS FOR COLOURING OR PRINTING PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL POLISHES PREPARATION OF CARBON BLACK PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D PRODUCTION OF CELLULOSE PULP COMPOSITIONS REFRACTORIES SLAG TEXTILES THEIR PREPARATION OR CHEMICAL WORKING-UP THEIR RELEVANT APPARATUS TRANSPORTING TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS,TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES TREATMENT OF NATURAL STONE USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS USE OF MATERIALS THEREFOR WOODSTAINS
Online-Zugang:	Volltext bestellen
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

Beschreibung
Zusammenfassung:	A method of heat treating kaolin particles which includes the steps of establishing in a furnace a heating zone suitable to calcine the particles and passing the particles rapidly through the heating zone whereby the particles are flash calcined in the heating zone, wherein the furnace is of the kind in which a toroidal fluid flow heating zone is established and the particles are heated in the said heating zone to a temperature of at least 550 DEG C but not greater than 1100 DEG C by application to the particles of a temperature increase rate greater than 10 Celsius degrees per second to give a rapid blistering of the particles caused by rapid dehydroxylation of the kaolin and wherein the particles have a residence time of less than 1 second in the said toroidal fluid flow heating zone. Ce procédé de traitement thermique de particules de kaolin comporte une phase lors de laquelle on crée dans un four une zone de chauffe se prêtant à la calcination des particules ainsi qu'une phase pendant laquelle on fait rapidement passer ces particules dans la zone de chauffe, ce qui entraîne leur calcination flash. Le four est du type dans lequel il est possible de créer une zone de chauffe à écoulement fluidique toroïdal et dans lequel on chauffe les particules à une température s'élevant à 550 DEG C au moins, sans toutefois dépasser les 1100 DEG C, et ce, en les soumettant à une température s'élevant à une vitesse supérieure à 10 degrés Celsius par seconde de manière à les cloquer rapidement, ce cloquage étant dû à la déshydroxylation rapide du kaolin. Le temps de séjour des particules est inférieur à une seconde dans cette zone de chauffe à écoulement fluidique toroïdal.