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

Since 1984 most of theoven walls have beenreplaced at SBCO includingfour walls more than once.During the interveningperiod, techniques havebeen developed to improvethe repair methods,resulting is strongerrefractory repairs than theoriginal design. In additionrepairs to the regeneratorshave been devised, asdescribed above, andmultiple wall replacementsevolved from doubles toquadruple. The remainderof this paper describesSBCO experience inthroughwall replacement.Fig 12: No Choice!The Throughwall and Regenerator Repair ProcessFor a single throughwall repair 4 ovens are left empty; for a double 5 leftempty; and for a triple 6 left empty, (i.e. no. of empty ovens = no. of walls+ 3). We have recently completed a quadruple throughwall repair; 7ovens were left empty for this repair. The buffer ovens remaining inservice are pushed and charged on 24 hours carbonisation time.When more than one wall is being replaced, strongbacks are boltedacross the buckstay of the wall to be repaired and the two adjacent walls(p/s & c/s) (Fig 13). Tie bars will be renewed, so this is done to preventoutward movement of steelwork and, as there will be no brickworkinside, therefore also preventing inward movement.15