Actual application of hot repairing technology to operating coke oven
In Wakayama Steel Works, the coke ovens have been operating for 23 [approximately] 25 years, and many over-aged parts can be seen. However the investment for the construction of a new coke oven is so huge that the maximum prolongation of the existing coke ovens life becomes very important. In the Wakayama Steel Works, it is thought that the coking chamber repairing technology can be the key to that prolongation. While, repairing the coking chamber, the area near the wall head can be observed by the naked eye and repaired using conventional methods, such a welding repairment by metal oxidation heat, partial chamber wall brick re-laying in the hot stage. However, these repairing methods are limited to the area near the wall head, and successful repair methods for the central portion of chamber wall have not, heretofore, been found. In the Wakayama Steel Works, the development of a new welding repairing machine for the central portion of the chamber wall was started and the actual repairing machine has been completed with practical use tests on operating coke ovens. This repairing machine has the following characteristic; (1) Repair of the central portion of ovens under high temperature (over 1,000 C); (2) Capability to seal narrow cracks or open brick joints and to smooth out brick roughness into a flat surface; (3) High working efficiency (max. welding capacity [equals] 30K g/h); (4) Compact and fully automatic operation with a high level of man/machine control interface; and (5) No disturbance of coke oven operation and no cooling of the chamber wall. In this paper, the outline of the actual hot repairing machine and its application results in the Wakayama operating coke ovens are reported.
- OSTI ID:
- 6383193
- Report Number(s):
- CONF-9303222-; CODEN: PIRCB9
- Journal Information:
- Proceedings, Ironmaking Conference; (United States), Vol. 52; Conference: 52. ironmaking conference, Dallas, TX (United States), 28-31 Mar 1993; ISSN 0099-6874
- Country of Publication:
- United States
- Language:
- English
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