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

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Fig 3: Finished wall – note quoin end needs a peelEnd wall rebuildUltimately the condition of a wall deteriorates to such an extent that noneof the above repair techniques is adequate to repair the brickwork and itis necessary to replace the refractory. This commences with ends of awall having to be replaced to a depth necessary to tie in to soundbrickwork. You are basically wasting your time if this is not done andonce started it is important not to disturb good brickwork. During therepair ‘rotten’ midfeathers may be found further into the oven wall thanexpected and a 6-flue repair may become an 8 or even a 10-flue repair.It follows that the next time a wall has to undergo an end repair, it isnecessary to replace further into the oven to tie-in to suitable brickwork.Consequently once started on an end wall programme, you can expectbigger repairs for years to come. In the case of South Bank, which isover 40 years old, some of the events of the past have been lost in timeand surprises occur. In some end repairs firebrick was found substitutedfor silica, and during number one oven wall end flue repair this wasfound melted.6
The end wall rebuild processFigure 4 shows a typical set up for a single end flue repair. Four ovensare left empty for this type of repair. The stoppers must be adjacent to amidfeather to prevent movement at that point. Bracing stoppers will alsobe put into the buffer ovens; this is also described below with throughwallrepairs.Fig 4: End wall Set upInsulating blankets are made on site using a suitable insulation wool,sandwiching aluminised glass cloth and held together inside a ‘cage’.Obviously these are required to ensure acceptable working conditionsbut also to protect the adjacent walls from cooling and stop prematureexpansion of the new brickwork. They are suspended through ascensionpipe and chargehole openings (fig 5).7
Page 2: Main types of refractory repairThe
Page 5: 3. Conveying - The powder is mixed
Page 9 and 10: Fig 6: Roof Support techniqueRoof s
Page 11 and 12: 5. If excessive damage is seen gas
Page 13 and 14: Fig 10: Traditional Warm-up Practic
Page 15 and 16: Since 1984 most of theoven walls ha
Page 17 and 18: To support the filled charge car, w
Page 19 and 20: Fig 17: Rolling the curtain rail in
Page 21 and 22: Fig 20: Triple throughwall during w
Page 23 and 24: Blankets are lashed back at the bot
Page 25 and 26: Fig 26: Regenerator dividing wall r
Page 27 and 28: Fig 29: Fascia Plates and Tie bars
Page 29 and 30: metres, this equates to around 200m
Page 31: Closing RemarksApart from the maint

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

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