Process for producing foundry exothermic body

B - Operations – Transporting – 22 – D

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B22D 7/10 (2006.01) B22C 13/08 (2006.01)

Patent

CA 2233585

A process for producing a foundry exothermic body such as an foundry exothermic riser sleeve includes the steps of preparing a raw material mixture whose components include one or more powdered/granular refractories, one or more powdered/granular exothermic materials, one or more powdered/granular oxidants and one or more powdered pro-oxidants, mixing thermosetting phenol resin with the raw material mixture to coat grain surfaces of the raw material mixture with thermosetting phenol resin and obtain a thermosetting phenol resin coated raw material mixture, and using the shell molding process to form and cure the thermosetting phenol resin coated raw material mixture into a foundry exothermic body of prescribed shape.

Une méthode pour produire des corps de fonderie en matériaux exothermiques, comme les enveloppes de masselottes, comprend les étapes suivantes : préparer un mélange de matériaux bruts, dont les constituants comprennent un ou plusieurs matériaux réfractaires en poudre/grains, un ou plusieurs matériaux exothermiques en poudre/grain, un ou plusieurs oxydants en poudre/grains et un ou plusieurs pro-oxydants en poudre; mélanger la résine phénolique thermodurcissable avec le mélange de matériaux bruts de façon à revêtir les surfaces granulaires du mélange de matériaux bruts à l'aide de la résine phénolique thermodurcissable et obtenir ainsi un mélange de matériaux bruts revêtu de la résine phénolique thermodurcissable; utiliser la technique du moulage en coquille pour former et solidifier le mélange de matériaux bruts enrobé de la résine phénolique thermodurcissable et en faire un corps exothermique de fonderie possédant la forme prescrite.

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