THE YEAR-BOOK OF THE COKE OVEN - Coke Oven Managers ...

DamageGood ConditionDamageGood ConditionDamageGood ConditionDamageGood ConditionDamageGood ConditionDamageGood ConditionDamageGood ConditionDamagedConditionGood ConditionDamagedConditionGood ConditionLower Oven DoorsThe first instance of damage of lower oven door commenced almost within2-3 months of first start up of coke oven Battery # 7 and 8. Similar to theupper door lining, changes were made in the lower door lining also. Mainlythe peripherals, which receive maximum external abrasions, were lined withdense LC-45 castable on top of Hysil boards. We are giving pictorialrepresentation of the extent of repair done almost over a year after 31stSeptember 2009. None of these freshly lined doors have failed to date.Bridge PipesIt was observed that the ceramic fibre lining of the bridge pipes were failingrepeatedly and fallen refractory material were blocking the suction ports. Itwas also observed initially that the temperature inside the bridge pipes wasshooting up as high as 1450°C leading to fusion and melting down of notonly the refractory material but also the mild steel body of the bridge pipes,creating gaping holes.200175150125100755025107 85 57 135 17 175 10 182 6 186 5 191 13 179 7 185 4 188031.09.2009 31.12.2009 28.02.2010 31.03.2010 30.04.2010 31.05.2010 30.06.2010 31.07.2010 31.08.2010Chart showing gradual decline of damaged bridge pipes vis-à-vis increasingnumbers in good condition.