Method of producing cement clinker

US5437721A · kind A · utility

Assignee

• Krupp Polysius AG · DE

Inventors

• Detlev Kupper · Telgte, DE
• Wolfgang Rother

Key dates

• Filing date: Jun 7, 1994
• Grant date: Aug 1, 1995
• Expiry date: Jun 7, 2014

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C04B7/44
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

The invention relates to a method of producing cement clinker from fine-grained cement raw material which after preheating and calcining is burnt in a clinker burning zone divided into two stages and is then cooled. Optimum process conditions, particularly in the clinker burning zone, are achieved in that the calcined material is first of all heated to a temperature up to the region of the sintering temperature in a stage formed by a fluidized bed or spouted bed so that a build-up granulation of the material is brought about, whereupon the material thus heated is heated to the sintering temperature in a second stage of the clinker burning zone which acts as the finish-burning stage and tempered to the finishing burn.