System for incorporating a binder in a mixture of powdered...

Details System for incorporating a binder in a mixture of powdered... System for incorporating a binder in a mixture of powdered...

B - Operations, Transporting

22

F

B22F 1/02 (2006.01) B01F 9/00 (2006.01) B22F 1/00 (2006.01)

Patent

CA 2220323

According to the system, a mixture of powdered materials is subjected in an enclosure to a dispersing movement whereby the components of the mixture are caused to fall freely in disperse form. During the fall, the dispersed components are sprayed with a binder dissolved in a solvent. On completion of the spraying, the dispersing movement is continued and a vacuum is simultaneously drawn in the vessel until the binder is in solid state. In this way, the solvent is recovered in part. The apparatus comprises a rotary closed vessel (1). Inside this, there is a suction conduit (19) and a spray conduit (11), extending into the vessel (1) in alignment with the axis thereof; the conduits (10, 11) are prolonged in respective vertical portions (12, 23) capped with a suction head (14) and a spray head (15).

D'après l'invention, un mélange de matériaux en poudre subit, dans une enceinte, un mouvement de dispersion qui amène les composants du mélange à tomber librement sous forme dispersée. Au cours de la chute, les composants dispersés sont pulvérisés avec un liant dissous dans un solvant. Après la pulvérisation, le mouvement de dispersion se poursuit, et un vide est créé simultanément dans le récipient jusqu'à ce que le liant soit à l'état solide. De cette manière, le solvant est en partie récupéré. Le dispositif comprend un récipient rotatif fermé (1) à l'intérieur duquel se trouvent un conduit d'aspiration (19) et un conduit de pulvérisation (11) qui se prolongent dans le récipient (1) parallèlement à l'axe de ce dernier. Les conduits (10, 11) se prolongent dans leurs parties verticales respectives (12, 13) et sont coiffés d'une tête d'aspiration (14) et d'une tête de pulvérisation (15).

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