Wet pelleter having variable annulus between shell and shaft

A wet pelleting apparatus essentially comprises a cylindrical shell and a shaft having pelleting pins affixed thereto, usually in a helical arrangement. In cross-sectional area taken at right angles to the axis of the shaft which is substantially concentrically disposed within the shell, the annulus...

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Bibliographische Detailangaben
Hauptverfasser:	HANN, PAUL D, GUNNELL, THOMAS J
Format:	Patent
Sprache:	eng
Schlagworte:	ADHESIVES CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMISTRY DYES INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OFSOLID INORGANIC COMPOUNDS INORGANIC CHEMISTRY METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS MIXING, e.g. DISSOLVING, EMULSIFYING, DISPERSING NATURAL RESINS PAINTS PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL POLISHES PREPARATION OF CARBON BLACK THEIR RELEVANT APPARATUS TRANSPORTING TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS,TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES
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Beschreibung
Zusammenfassung:	A wet pelleting apparatus essentially comprises a cylindrical shell and a shaft having pelleting pins affixed thereto, usually in a helical arrangement. In cross-sectional area taken at right angles to the axis of the shaft which is substantially concentrically disposed within the shell, the annulus formed between the shaft and the configuration given to it and the shell inner wall and the configuration given to it decreases and increases as the plane of cross-section is moved from the feed end of the apparatus to the discharge end thereof. In one embodiment, the shaft has an undulating or repetitive hourglass configuration and the inner wall of the shell is rectilinear. In another, the inner wall of the shell can be given an undulating configuration. In a third, both the wall and shaft surfaces can be formed so as to cause, according to the invention, alternate compression and decompression of particles being pelleted. The invention is described in connection with the wet pelleting of carbon black with water.