Oxyfuel clinker production with special oxygen addition

US11878950B2 · kind B2 · utility

Assignees

• THYSSENKRUPP INDUSTRIAL SOLUTIONS AG · DE
• Vicat SA · FR

Inventors

• Jost LEMKE · Ennigerloh, DE
• Eike WILLMS · Dortmund, DE

Key dates

• Filing date: Apr 26, 2019
• Grant date: Jan 23, 2024
• Expiry date: Apr 26, 2039

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F27B7/383
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

Processes and plants for producing cement clinker, in which an oxygen-containing gas having a proportion of 15% by volume or less of nitrogen and a proportion of 50% by volume or more of oxygen is conveyed from a first section of the cooler directly adjoining the top of the furnace into the rotary furnace and is optionally additionally conveyed to the calciner, and where the total gas streams fed in to the combustion processes consist to an extent of more than 50% by volume (preferably more than 85% by volume) of oxygen.