Coke oven featuring improved heating properties
A coke oven of a horizontal construction of the non-recovery or heat recovery type is shown. The oven has at least one coking chamber, in which laterally vertical downcomers as well as horizontal bottom flues extend underneath the coking chamber for indirect reheating of the coking chamber. At least a part of the interior walls of the coking chamber is configured as a secondary heating source by coating it with a high-emission coating (HEB) that shows an emission degree equal to or higher than 0.9, and consists of the substances Cr 2 O 3 or Fe 2 O 3 or a mixture containing these substances, with the portion of Fe 2 O 3 amounting to at least 25% by weight in the mixture, and with the portion of Cr 2 O 3 amounting to at least 20% by weight in the mixture.
1. A coke oven of horizontal construction of the type non-recovery or heat-recovery, consisting of at least one coking chamber, laterally arranged vertical downcomers as well as bottom flues arranged horizontally and underneath the coking chamber for indirect reheating of said coking chamber, wherein at least a part of the interior walls of the coking chamber is configured as secondary heating surfaces by coating them with a high-emission coating, with the emission degree of this high-emission coating being equal to or higher than 0.9.
2. The device according to claim 1 , wherein the high-emission coating consists of the substances Cr 2 O 3 or Fe 2 O 3 or of a mixture containing these substances, with the portion of Fe 2 O 3 amounting to at least 25% by wt, in a mixture and with the portion of Cr 2 O 3 amounting to at least 20% by wt, in a mixture.
3. The device according to claim 1 , wherein the high-emission coating furthermore contains SiC with a portion of at least 20% by wt.
4. The device according to claim 1 , wherein the high-emission coating furthermore contains one or more inorganic binding agents.
5. The device according to claim 1 , wherein the grain size of the high-emission coating constituents is smaller than or equal to 15 μm.
6. The device according to claim 1 , wherein the walls of the flue gas channels extending horizontally underneath the coking chamber are partly or entirely coated with the high-emission coating.
7. The device according to claim 1 , wherein one or more heating elements are arranged in the coke oven chamber, said heating elements consisting entirely of the substances that form the high-emission coating.
8. The device according to claim 7 , wherein the heating elements are shaped as hanging ribs or hanging walls, and that said heating elements have openings or a partly open structure.
9. The device according to claim 7 , wherein the heating elements can be detachably hung into suitable holders, with these holders being mounted in the wall and/or top of the coking chamber.
10. The device according to claim 7 , with a section-wise division of the coking chamber by the heating elements wherein an air feeder mains leads into each of these sections and one or two downcomers lead out from each of these sections.
11. The device according to claim 5 , wherein the grain size of the high-emission coating constituents ranges between 2.5 and 10 μm.