System for incorporating a binder in a mixture of powdered materials and apparatus therefor

摘要

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). <IMAGE>