Cement system and method for operating a cement system

US8764438B2 · kind B2 · utility

Inventors

• Detlev Kupper · Telgte, DE
• Dietmar Schulz · Roßtal, DE

Key dates

• Filing date: Jul 28, 2009
• Grant date: Jul 1, 2014
• Expiry date: Jun 22, 2030

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F27D17/20
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

In the method according to the invention for operating a cement plant, the raw meal is preheated in a preheating zone, the preheated material is precalcined in a calcining zone and the precalcined material is finally sintered in a sintering zone. The cement plant is operated in such a manner that the precalcined material which is supplied to the sintering zone has an SO3 concentration of at least 5.5% by mass and a CaSO4 proportion of at least 75%, preferably 90%, of the total salt content.