Processes and apparatus for the heat treatment of fine-grained material

US4257766A · kind A · utility

Assignee

• Polysius AG

Inventors

• Horst Ritzmann · Enniger, DE
• Klaus Bauer · Ulm, DE
• Heinz-Herbert Schmits · Rheda-Wiedenbrück, DE
• Wolf Goldmann · Beckum, DE
• Hennig Korn · Ennigerloh, DE

Key dates

• Filing date: Nov 15, 1978
• Grant date: Mar 24, 1981
• Expiry date: Nov 15, 1998

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F27B7/2033
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

Processes and apparatus for the heat treatment of fine-grained material, particularly for the production of cement, wherein the material is preheated in a preheater, further heated in a precalcination zone using additional fuel, calcined to completion in a rotary kiln, and cooled in a cooler, the preheated material being introduced into a cooling air stream run off from the cooler and the resulting mixture of gas and solids being introduced from the side into a gas pipe which connects the rotary kiln to the preheater and through which the kiln exhaust gases flow in the upward direction.