Method and apparatus for burning fine grained material, particularly raw cement meal

US4496396A · kind A · utility

Assignee

• Klockner-Humboldt-Deutz AG · DE

Inventors

• Eberhard Steinbiss · Cologne, DE
• Horst Herchenbach
• Hubert Ramesohl · Bensberg, DE
• Albrecht Wolter · Bremen, DE

Key dates

• Filing date: Sep 12, 1983
• Grant date: Jan 29, 1985
• Expiry date: Sep 12, 2003

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P40/121
• WIPO field: Thermal processes and apparatus
• WIPO sector: Mechanical engineering

Abstract

A method and apparatus for burning fine grained products, such as raw cement meal, wherein the product is preheated in a preheating stage, calcined in a calcining stage, and is burned into clinker in a clinker stage followed by cooling in a cooling stage. The heating of the largely calcined product in the temperature range of about 900.degree. C. to the beginning of alite formation which occurs at approximately 1250.degree. C. is carried out under the fastest possible temperature rise conditions and the clinker reaction is carried out in concurrent flow with the gas stream in the burning stage. The clinker is then graded into a coarse grained fraction and a fine grained fraction which are then cooled in separate coolers after separation from the gas stream.