Coke oven

Introduction

Sheffield Refractories have been supplying refractory repair materials to the coke industry for over 30 years.

The range of products includes wet spray, purge and gunning refractories for coke oven jamb and inner wall repairs, oven sole repair cements, castable refractories for coke oven door and ascension pipe linings, charge hole lid sealing materials, fused cast blocks for the hot cokes ram and 250x250x30 mm plates for the coke transportation ram.

Customers for Sheffield Refractories coke oven products include all the UK coke plants and a number of overseas coke plans including Sollac DunkerqueFrance and Sidmar Gent Belgium.

Coke oven repair methods

1. Wet spray patching with Jonsett WS chemically bonded refractory cement is used as a routine method for repair of open joints, cracks and slight spall damage.
   
2. Dry Gunning with Jongun 1600 GM hydraulic bonded gunning refractory is a highly effective method of repairing badly spalled-eroded wall areas.
   
3. Purging with Jonsett IFT Fine or Coarse is an alternative method to 1&2 for the repair of jamb brickwork.
4. Sole Flooding by the bucket method with Jonsett SOL heat setting cement is the conventional way of repairing worn uneven oven soles. Jonsett SOL contains coarse aggregates which give good wear resistant properties.
   
5. Riser pipe grouting with Joncast WS chemically bonded refractory cement, applied by pressure vessel, is used for sealing leakages between the gas risers and the regenerators. The fine grading of the Jonsett WS enables it to flow into very narrow joints-cracks giving an excellent seal.
6. Hydraulic bonded castabel refractories are used for a number of coke oven applications. Joncast LC1400 for casting door plugs and Joncast MS for lining ascension pipes.
   
7. Airborne sealing or oven dusting – Jonsett 4D fine powder is used for sealing fine cracks between the oven camber and flues. This method is only effective if all major leaks have been sealed prior to air bone sealing.
   
8. Charge Hole Lid sealing is important in controlling emissions. Jonseal SF Dry is the ideal material for this being an effective sealant with good release properties.