Process for the production of cement in a fluidized bed

US4213790A · kind A · utility

Assignee

• Polysius AG

Inventors

• Klaus Bauer · Ulm, DE
• Wolf Goldmann · Beckum, DE
• Horst Kretzer · Frankfurt am Main, DE
• Heinrich Weber · Recklinghausen, DE
• Rudiger Beyer · Bad Waldliesborn, DE
• Wilfried Kreft · Beckum, DE
• Frank Schaberg · Oelde, DE
• Rudolf Weber · Bad Aibling, DE
• Herbert W. Schmelter · Ennigerloh, DE
• Horst Ritzmann · Enniger, DE
• Erich Schnieder · Ahlen, DE
• Georg Schepers

Key dates

• Filing date: Jul 24, 1978
• Grant date: Jul 22, 1980
• Expiry date: Jul 24, 1998

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B60Y2200/143
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A process for producing cement wherein preheated, partially calcined powder-form raw material is finally calcined in a fluidized bed and is discharged to a cooler through which a cooling stream of air passes. A part of the cooling air passes into the fluidized bed from below and another part of the cooling air, together with the partially calcined material, passes into the fluidized bed from the side. The rates of material flow to and from the fluidized bed is regulated to maintain a substantially uniform intersticial ratio between the upper and lower regions of the fluidized bed.