Apparatus and process for the production of grit free finely dispersed pigments

US3956106A · kind A · utility

Assignee

• Deutsche Gold- und Silber-Scheideanstalt Vormals Roessler

Inventors

• Gustav Muck
• Lothar Rothbuhr · Hürth, DE
• Kurt Stoklossa

Key dates

• Filing date: Feb 11, 1974
• Grant date: May 11, 1976
• Expiry date: Feb 11, 1994

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C01P2004/61
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

An apparatus is provided for removal of grit from a finely dispersed solid containing gas stream serving for the pneumatic conveyance of this material, the apparatus comprising a closed separator housing having a funnel shaped lower portion, a supply tube for the conveying gas stream opening laterally in the upper part of the housing, an outlet tube (in a given case connected to a vacuum source) for purified finely dispersed solid disposed opposite the supply tube in the upper part of the housing, a vertically disposed connecting piece between the lower end of the funnel shaped lower portion and a discharge valve, an axially disposed cap shaped displacement member open at its lower end in said connecting piece and of lesser diameter whereby an annular gap is formed between the displacement member and the connecting piece and a supply tube for furnishing a secondary gas stream to the interior of said displacement member. There is also described the process of removing the grit from the finely divided solid using this apparatus.