Method for the treatment of finely grained material, particularly for the precalcining of cement

US4066470A · kind A · utility

Assignee

• Klockner-Humboldt-Deutz AG · DE

Inventors

• Kunibert Brachthauser · Bensberg, DE
• Hubert Ramesohl · Bensberg, DE
• Klaus Beisner
• Horst Herchenbach

Key dates

• Filing date: Mar 9, 1976
• Grant date: Jan 3, 1978
• Expiry date: Mar 9, 1996

Classification

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

Abstract

A method and mechanism for calcining cement wherein the material is preheated in a precalcining zone and a vertical conduit leads heated discharge gases upwardly from a main calcining furnace, a supply of fuel and a supply of oxygen is fed to a preoxidation zone beneath the precalcining zone and raw material is fed into an admixing area above the burner with a deflector preventing particles from falling down into the preoxidation zone with the fuel being partially oxidized so that controlled heating and controlled oxidation occurs in the precalcining zone.