Abstract: 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.

Abstract: A waste heat removal system for a regenerative coke oven battery which has side burners and a regenerator portion comprises a plurality of substantially parallel longitudinally extending channels of substantially equal cross section which are defined in the battery at spaced lateral locations and extend over substantially the entire length of the battery below the regenerator portion. A common transversely extending collecting duct adjacent one end of the battery is connected to each of the channels. A waste heat collection duct is disposed along at least one side of the channels and it is associated with a selective portion of the regenerator and a long cross channel is connected to the waste heat connection duct and to selected ones of the channels. The cross channels extend from the pusher side to the coke side or vice versa and form alternately short and long connections to corresponding longitudinal channels.

Abstract: In a horizontal type coke oven, high temperature waste gas generated in a heating flue chamber and containing nitrogen oxides is discharged into a regenerator. There are provided nozzle openings for injecting ammonia or ammonia precursor to the high temperature waste gas at a position where the temperature of the waste gas is about 750.degree.-1000.degree. C. so as to reduce the nitrogen oxides in the waste gas with the ammonia or ammonia precursor.