Heat-cured foundry binders and their use

Details Heat-cured foundry binders and their use Heat-cured foundry binders and their use

B - Operations, Transporting

22

C

B22C 1/18 (2006.01) C04B 12/00 (2006.01) C04B 28/24 (2006.01)

Patent

CA 2174751

This invention relates to heat-cured foundry binders comprising in admixture (1) a source of soluble silica, and (2) a source of soluble alumina, such that the source of silica, source of alumina, or both contain an alkali metal. The binder components form a saturated solution when they are mixed with an aggregate. The resulting mix is shaped and heated at an elevated temperature to form a cured foundry shape. Heat is applied by warm air with warm-box equipment, baking in an oven, microwave, and preferably from hot-box equipment.

L'invention concerne des liants de fonderie thermodurcis constitués d'un mélange (1) d'une source de silice soluble et (2) d'une source d'alumine soluble, de manière que la source de silice, la source d'alumine ou les deux contiennent un métal alcalin. Les constituants des liants forment une solution saturée quand on les mélange avec un agrégat. On façonne et on chauffe le mélange obtenu à température élevée, afin de réaliser une forme de fonderie durcie. On applique de la chaleur au moyen d'air chaud, on effectue une cuisson dans un four, sous micro-ondes et, de préférence, dans une boîte à noyau réchauffée.

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