Process for the recycling of residues for the production of...

Details Process for the recycling of residues for the production of... Process for the recycling of residues for the production of...

C - Chemistry, Metallurgy

04

B

C04B 7/44 (2006.01) C02F 11/00 (2006.01)

Patent

CA 2252917

The present invention relates to a process for producing cement clinker in rotary furnaces with the substitution of primary raw materials and fuels by the use of minerals and residues containing combustible components with moisture contents of up to 65 % without pre-drying. The process facilitates the material and/or thermal recycling of residues while conserving clay and fuel resources and relieving dumps while at the same time reducing the emissions, especially NOx from the cement rotary furnaces.

La présente invention concerne un procédé de production de clinker de ciment dans des fours rotatifs, selon lequel on remplace des matières premières et des combustibles primaires par des résidus contenant des minéraux et des fractions combustibles avec des teneurs en humidité pouvant s'élever jusqu'à environ 65 % sans préséchage. Ce procédé permet d'effectuer un recyclage matière et/ou thermique de résidus, de préserver les ressources en argile et en combustible, de ne pas encombrer les décharges et de réduire en même temps les émissions, en particulier de NO¿x?, provenant des fours rotatifs à ciment.

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