Extrusion product based on hydrated lime

Details Extrusion product based on hydrated lime Extrusion product based on hydrated lime

C - Chemistry, Metallurgy

01

F

C01F 11/02 (2006.01) B01D 53/50 (2006.01) B01D 53/68 (2006.01)

Patent

CA 2333778

The invention concerns an extrusion product containing hydrated lime, in the form of a calcined extruded product containing at least a binding agent capable of withstanding the extrusion product calcination temperature. Said product is prepared by dry process mixing of hydrated lime, at least said binding agent and a plasticising agent, gradually incorporating water in said mixture so as to obtain a paste capable of being extruded, extruding said paste into said extruded product, drying and calcining the dried extruded product at a calcination temperature higher than the plasticising degradation temperature and lower than the hydrated lime decomposition temperature.

Produit d'extrusion contenant de la chaux hydratée, sous la forme d'un extrudé calciné qui contient au moins un liant capable de résister à une température de calcination du produit d'extrusion. Ce produit est préparé par un mélange à sec de la chaux hydratée, d'au moins un liant susdit et d'un agent plastifiant, une incorporation progressive d'eau dans ce mélange de façon à obtenir une pâte extrudable, une extrusion de cette pâte en ledit produit extrudé, un séchage et une calcination du produit extrudé séché à une température de calcination supérieure à la température de dégradation de l'agent plastifiant et inférieure à la température de décomposition de la chaux hydratée.

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