Coke oven with improved heating properties

Details Coke oven with improved heating properties Coke oven with improved heating properties

C - Chemistry, Metallurgy

10

B

C10B 29/02 (2006.01) C10B 15/02 (2006.01) F27D 1/00 (2006.01)

Patent

CA 2663746

The invention relates to a horizontally designed, non-heat recovery-type coke oven comprising at least one coking chamber, downcomers that are laterally disposed in relation to the coking chamber, and bottom ducts which are horizontally arranged below the coking chamber in order to indirectly heat the coking chamber. At least some of the interior walls of the coking chamber are embodied as a secondary heating area by coating the interior walls with a high-emission coating (HEB). The minimum emissivity of said high-emission coating is 0.9. Preferably, the high-emission coating (HEB) is made of Cr2O3, Fe2O3, or a mixture containing said substances, the Fe2O3 moiety in a mixture amounting to at least 25 percent by weight and the Cr2O3 moiety in a mixture amounting to at least 20 percent by weight.

L'invention concerne un four à coke de type horizontal (à récupération de chaleur ou sans récupération de chaleur) qui comprend au moins une chambre de cokéfaction, des carneaux de gaz brûlés verticaux (descentes) placés sur le côté de la chambre de cokéfaction, ainsi que des conduits de sol placés horizontalement sous la chambre de cokéfaction et servant au chauffage indirect de la chambre de cokéfaction. Selon l'invention, on réalise au moins une partie des parois intérieures de la chambre de cokéfaction en tant que surface chauffante secondaire en revêtant ces parois d'un revêtement à émission élevée ayant un degré d'émission supérieur ou égal à 0,9. Ce revêtement à émission élevée est de préférence constitué des matériaux Cr2O3 ou Fe2O3 ou d'un mélange contenant ces matériaux, la part de Fe2O3 dans un mélange étant d'au moins 25 % en poids et la part de Cr2O3 dans un mélange étant d'au moins 20 % en poids.

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