Coke Ovens

For more than 30 years, FIBS has been providing coke plants  with  technologies dedicated to the PREVENTIVE MAINTENANCE and CURATIVE REPAIR of the refractories of coke ovens, as well as a unique process for the REDUCTION OF AIR EMISSIONS (cross leakages). These technologies have been fully in house engineered.

A Comprehensive Maintenance Plan including Inspections, Cermaic Welding, Gunning, Microcracks Sealing, Charging Holes / Ascension Pipes Sealing, Door Sealing and Related Activities will ensure environement-friendly operations. 


Our Special Techniques to Reduce Stack Emissions
Check  Here !

Ceramic Welding

Ceramic Welding process of FIBS has been self-developed in the early 90's. This process is now accepted by the industry as one of the most performing process thanks to :

Small & Light / Safe

Simple & Easy Maintenance

Low/High Flow

Lances From 1 to 11 meters

Only Oxygen

(No Air, Nitrogen, Electricity, Pressure)

Low Maintenance

Low Spare Parts Cost

Machine & Equipments  

Preparation of the surface to be welded is one of the most important step of the ceramic welding repair.

FIBS offers 2 methods of Surface Preparation



Pneumatic Hammers

Surface Preparation

Materials Suitable for each specific repairs :

  • Standard Silica Repairs

  • Low Temperature Repairs

  • Chamotte/Alumina Repairs 

For Sole Flues, Lintel Area, Door Jamb Bricks, Heating Wall, Watse Gas Box, Renegerators, Sole, Charging Holes 


IMG_0637 (2).JPG

Liquid Dusting for the Reduction of Air Emissions (Microcracks Treatment) : RPR SL


Air emissions and environmental care are to be considered as an important factor of the coke production.

Air emissions due to the coke production process have various origins, among them the cross leakages between the coking chamber and the heating flues. When the leakages are below 2 mm, it is very difficult to close them individually with ceramic welding. FIBS has engineered an genuine process that allows the global sealing of microcracks up to 2 mm.

The process consists in the pulverization of approximately 2 liters of  liquid material (it is not a waterous suspension of silica) in the coke oven chamber. The material will ignite and create a cloud of new silica particles (amorphous = no risk for health) that will be pushed by the pressure release of the reaction through the cracks until complete sealing of the coking chamber. The application takes only 5 minutes

Main advantages 

  • No risk for silica disease

  • Quick and easy

  • More efficient than silica dusting

  • No deposit on the flue bottom 

RPR SL Pulverization
RPR SL Deposit after Application
RPR SL Pulverization


The application of S-Bricks is a quick and cheap solution to the hot repair of major damages. 

It can be applied for :

  • End Flue Repair (full height) : possible to repair 1st and 2nd flues even for tall ovens 

  • Flues Repair (partial) after cleaning of the heating flue bottom

  • Flues Repair (partial) deeper in the coke oven chamber

Installation of S-Bricks
Installation of S-Bricks
Installation of S-Bricks in the Middle of the Under Endoscopy Chamber

Glass Coating (RPR GC)

RPR GC (Glass Coating) is a very specific grade of ceramic welding material especially developed to prevent a strong and deep anchorage of carbon in the refractory lining of the coke oven. This material can be applied in :

  • The charging hole area 

  • The Upper part of the chamber

  • The ascension pipe and the goose neck

Glass Coating Application in Goose Neck
Glass Coating Layer
Glass Coating Application in Chaging Hole
Glass Coating


FIBS has developed its own endosopic equipment in the prupose of assistance during the repairs in the middle of the ovens, or in the heating flue. This Equipment can also be used for the monitoring of heating flue, gas gun, regenerators, and channels.

ndoscopy Top of Regenerator
Endoscopy Air Riser

Expertise, Technical Assistance and Training

FIBS has set up an expert team with long-experienced coke plant operators/managers, ceramic welding specialists and refractory specialists. This team is able to :

  • Train and assist contractor (ceramic welding, best practice for maintenance, refractories, etc.)

  • Assist the coke pant with solving problem, implementation of a maintenance programm, adjustment of production parameters, etc...

  • Provide any other audit and survey service (conditions of the ovens, recommendations, etc.)

FIBS' specialists have already trained, certified and assisted more than 350 ceramic welders in more than 25 different countries !


Doors, Ascension Pipes & Doors Sealing

  • Perfect Sealing

  • Ready to Use Liquid : No preparation (mix)

  • Application manual or automatic

  • Easy to remove

  • Economical


Special Equipments & Methodologies


FIBS Specialists have developed many methods and special equipment/tools for the maintenance of the coke oven


  • Clean Gas & Air Port

  • Seal the gas guns

  • Repair major defect (+clean the gas/air port) deep in the oven

  • Regenerator repairs

  • Improve the temperature in the flues

  • Clean the gas/air ports

Equipment Tools:

  • Tools for vacuum the gas/air ports

  • Insulation panels

  • Water cooled support for welding or gunning lance

  • Hanging support for welding or gunning lance 

  • Etc

FIBS Cleaning FLue
Deep Cleaning
Clean Ports

Guniting, Concretes, Sole Repair