Method for the desulfurization of coal

US4252638A · kind A · utility

Assignee

• Klockner-Humboldt-Deutz AG · DE

Inventors

• Hans Bender · Leverkusen, DE
• Werner Hasse · Hamburg, DE
• Roland Pfeiffer
• Karl-Heinz Unkelbach · Neunburg vorm Wald, DE

Key dates

• Filing date: Dec 6, 1978
• Grant date: Feb 24, 1981
• Expiry date: Dec 6, 1998

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C10L9/00
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A method for reducing the sulfur content of coal which involves an integrated, continuous process including the steps of grinding the coal in a dry state, activating the ground coal to increase substantially the magnetic susceptibility of the pyrite contained therein, and separating the thus activated pyrite magnetically from the remainder of the coal.