Method for the production of a coal suspension

US4753660A · kind A · utility

Assignee

• Klockner-Humboldt-Deutz AG · DE

Inventors

• Hans Kellerwessel · Aachen, DE
• Hans-H. Gildemeister · Overath, DE
• Jurek Golda · Bielefeld, DE
• Peter Zahr · Bensberg, DE
• Gerhard Keichel · Wülfrath, DE

Key dates

• Filing date: Mar 17, 1986
• Grant date: Jun 28, 1988
• Expiry date: Mar 17, 2006

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C10L1/326
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The invention relates to an apparatus and method for producing a free flowing coal suspension high in solids content. The coal is ground in at least two stages utilizing a mill having a calibrating effect in one stage and a mill without calibrating effect in another stage and adding a sub-quantity of viscosity reducing additive to the coal before each grinding. A drying of the coal or reconcentration of the suspension is not required. A roller mill operating on the principle of materials bed comminution is preferred as the non-calibrating mill in the first grinding stage and a rotating drum mill or a vibration grinding mill with rods as grinding bodies is preferred as the calibrating mill.