Process for dewatering coal slurries

US4257879A · kind A · utility

Assignee

• Bergwerksverband GmbH · DE

Inventors

• Bernd Bogenschneider · Essen, DE
• Rolf Kohling · Bochum, DE
• Heinz Kubitza · Essen, DE
• Wilhelm Blankmeister · Essen, DE
• Dieter Leininger · Essen, DE

Key dates

• Filing date: Sep 17, 1979
• Grant date: Mar 24, 1981
• Expiry date: Sep 17, 1999

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B03B9/005
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

The invention concerns a method for optimization of the coal slurry dewatering process. Through a regulation of the fine grain content, it is possible to keep the filter cake at a constant level and thus to maximize the dewatering process. A separation of the slurry into a predominantly relatively fine grain fraction and a relatively coarse grain fraction, with the division point being between about 0.03 and 0.15 mm, is carried out, with a formation of a coal agglomerate from the fine grain fraction, and a dehydration of both the coarse grain fraction and the coal agglomerate from the fine grain fraction.