Method for producing cement clinker

US6030448A · kind A · utility

Assignee

• Krupp Polysius AG · DE

Inventors

• Wilfried Kreft · Beckum, DE
• Martin Uhde · Ennigerloh, DE
• Wolfgang Rother

Key dates

• Filing date: Jan 28, 1998
• Grant date: Feb 29, 2000
• Expiry date: Jan 28, 2018

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P40/121
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

The invention relates to the production of cement clinker from cement raw material using a preheating zone, a calcination zone, a heating zone in which the calcined material is further heated whilst avoiding the formation of a molten phase, as well as a clinker burning zone and cooling zone from which part-quantities of the hot exhaust air are delivered as combustion air together with proportions of fuel to the clinker burning zone, the heating zone and the calcination zone. A reliable further heating while avoiding incrustations is achieved in the heating zone by constructing this zone in the manner of a flue stream reactor to which calcined material, fuel and combustion air are delivered in the lower end region of a rising first treatment zone at one point in each case and from which the heated material is precipitated essentially by the effect of gravity overlaid with centrifugal action.