Process of thermally treating bulk materials in a rotary kiln

US4391583A · kind A · utility

Assignee

• Metallgesellschaft AG · DE

Inventors

• Harry Serbent · Hanau, DE
• Detlev Schlebusch · Mellrichstadt, DE
• Gerhard Reuter · Ismaning, DE
• Wolfram Schnabel · Idstein, DE

Key dates

• Filing date: Oct 13, 1981
• Grant date: Jul 5, 1983
• Expiry date: Oct 13, 2001

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F27B7/38
• WIPO field: Thermal processes and apparatus
• WIPO sector: Mechanical engineering

Abstract

In the treatment of bulk materials with hot gases below the melting point of the charge component it is desired to prevent a formation of undesired crusts during normal operation and when the rotary kiln is operated at a reduced speed during short-time trouble. For this purpose, a controlled dissipation of heat is effected in several sections of the rotary kiln in that the shell of the kiln and the refractory lining are cooled so that the temperature of that portion of the inside surface of the rotary kiln which is submerged below the charge is always maintained at or up to 50.degree. C. below the temperature of the charge disposed thereover.