Coke Oven Refractory Repairs Feb10

Coke Oven Refractory Repairs...

Coke Oven Refractory Repairs Coke oven battery is a refractory structure, contained within a steel and/or concrete exoskeleton. This exoskeleton is held together in the lateral direction by a series of tie rods between steel buckstays. The buckstays are vertical steel beams located on the ends of the heating walls between the ovens. In a longitudinal direction, the tie rods extend between the pinion walls on either end of the battery. The heating walls have traditionally been constructed of silica refractories. Silica is the refractory of choice primarily because, at normal coke oven battery operating temperatures, silica refractories are subject to minimal creep. Also, since nearly all of the expansion of silica bricks take place at temperatures which are below 650 deg C, hence the moderate temperature fluctuations of the walls have no effect on the volume stability of the refractory comprising the wall during normal operation of a battery. Coke oven batteries will have an operating life of twenty to forty years, depending upon operating conditions and battery maintenance. There are several examples of coke oven batteries working for 40 Р50 years due to correct operation and timely repair. There are also cases where the failures of coke oven refractories has happened in less than 10 years of its operations.  Usually a battery requires specific repairs to the refractories, steelwork or machinery. These repairs, if properly performed, extend the life of the battery. In order to prolong the service life of coke oven battery, it is essential to avoid damage to the oven wall. In particular, it is especially important to avoid brick breakage, since this causes an opening in the brick wall and the oven must be stopped, and the oven brickwork may be further damaged during the process of idling. The...