Equipment for and method of calcination of mineral materials with reduced emission of nitrogen oxides

US5713734A · kind A · utility

Assignee

• Technip · FR

Inventors

• Michel Makris · Chatou, FR
• Jacques Dupuis · Ludwigshafen, DE
• Jean-Luc Sue · Orange, FR

Key dates

• Filing date: Jul 19, 1996
• Grant date: Feb 3, 1998
• Expiry date: Jul 19, 2016

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F27B7/2033
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

An equipment for and a method of calcining mineral materials comprising a precalciner consisting of a combustion zone followed by a reaction zone and then by a contact zone and by a post-combustion zone, the latter communicating itself with a separating cyclone, the reaction zone being fed with smokes coming from a firing furnace, the supply of mineral material being distributed between the combustion zone and the contact zone, the invention being applicable in particular to the manufacture of cement clinker while considerably decreasing the emission of nitrogen oxides.