5/04/13 1 COMA Conference 2013 J.P. GAILLET © 2013 – Centre de Pyrolyse de Marienau – All rights reserved for all countries Cannot be disclosed, used or reproduced without prior written specific authorization of CPM CONFIDENTIAL – Privileged Information - CPM 's proprietary information Years of Research and Development At Centre de Pyrolyse de Marienau 65 More than Latest developments in coke oven inspection by endoscopy J. DELINCHANT, D. STREIFF and J.P. GAILLET Centre de Pyrolyse de Marienau, Forbach, France

5/04/13 2 COMA Conference 2013 J.P. GAILLET © 2013 – Centre de Pyrolyse de Marienau – All rights reserved for all countries Cannot be disclosed, used or reproduced without prior written specific authorization of CPM CONFIDENTIAL – Privileged Information - CPM 's proprietary information Years of Research and Development At Centre de Pyrolyse de Marienau 65 More than Milestones  1990: Design and implementation of rigid water-cooled endoscopes up to 9.5 m long  1992: First generation of Videofil ® machine  2006: Last generation of Videofil ® machine fully automatic  2010: Robot for regenerator sole flue inspection

5/04/13 3 COMA Conference 2013 J.P. GAILLET © 2013 – Centre de Pyrolyse de Marienau – All rights reserved for all countries Cannot be disclosed, used or reproduced without prior written specific authorization of CPM CONFIDENTIAL – Privileged Information - CPM 's proprietary information Years of Research and Development At Centre de Pyrolyse de Marienau 65 More than Videofil ® machine principle

5/04/13 4 COMA Conference 2013 J.P. GAILLET © 2013 – Centre de Pyrolyse de Marienau – All rights reserved for all countries Cannot be disclosed, used or reproduced without prior written specific authorization of CPM CONFIDENTIAL – Privileged Information - CPM 's proprietary information Years of Research and Development At Centre de Pyrolyse de Marienau 65 More than High temperature viewing heads

5/04/13 5 COMA Conference 2013 J.P. GAILLET © 2013 – Centre de Pyrolyse de Marienau – All rights reserved for all countries Cannot be disclosed, used or reproduced without prior written specific authorization of CPM CONFIDENTIAL – Privileged Information - CPM 's proprietary information Years of Research and Development At Centre de Pyrolyse de Marienau 65 More than Led Low temperature viewing heads

5/04/13 6 COMA Conference 2013 J.P. GAILLET © 2013 – Centre de Pyrolyse de Marienau – All rights reserved for all countries Cannot be disclosed, used or reproduced without prior written specific authorization of CPM CONFIDENTIAL – Privileged Information - CPM 's proprietary information Years of Research and Development At Centre de Pyrolyse de Marienau 65 More than 3 minutes at 1300°C Residence time

5/04/13 7 COMA Conference 2013 J.P. GAILLET © 2013 – Centre de Pyrolyse de Marienau – All rights reserved for all countries Cannot be disclosed, used or reproduced without prior written specific authorization of CPM CONFIDENTIAL – Privileged Information - CPM 's proprietary information Years of Research and Development At Centre de Pyrolyse de Marienau 65 More than Main characteristics  Useful length: 10 m  Maximum diameter: 60 mm  Interchangeable objective lenses for axial, lateral or retrograde view of the target  360° rotation of viewing head  CCD color or B&W camera  Automatic focusing  Superimposing of depth and direction of view  Working temperature: from 0°C to 1400°C  Residence time: 3 minutes at 1300°C  Interval time between 2 inspections: 5 to 10 minutes

5/04/13 8 COMA Conference 2013 J.P. GAILLET © 2013 – Centre de Pyrolyse de Marienau – All rights reserved for all countries Cannot be disclosed, used or reproduced without prior written specific authorization of CPM CONFIDENTIAL – Privileged Information - CPM 's proprietary information Years of Research and Development At Centre de Pyrolyse de Marienau 65 More than Applications n Assessment of refractory damage  Oven roof  Heating flues  Corbel area  Regenerator tops n Definition of the extent of the repair work n Selection of the most appropriate repair technique n Assistance to gunning or ceramic welding operation  Gunning from inside the flue  Ceramic welding in the middle of the ovens n Evaluation of the repair efficiency

5/04/13 9 COMA Conference 2013 J.P. GAILLET © 2013 – Centre de Pyrolyse de Marienau – All rights reserved for all countries Cannot be disclosed, used or reproduced without prior written specific authorization of CPM CONFIDENTIAL – Privileged Information - CPM 's proprietary information Years of Research and Development At Centre de Pyrolyse de Marienau 65 More than Some examples (1/2)

5/04/13 10 COMA Conference 2013 J.P. GAILLET © 2013 – Centre de Pyrolyse de Marienau – All rights reserved for all countries Cannot be disclosed, used or reproduced without prior written specific authorization of CPM CONFIDENTIAL – Privileged Information - CPM 's proprietary information Years of Research and Development At Centre de Pyrolyse de Marienau 65 More than Some examples (2/2)

5/04/13 11 COMA Conference 2013 J.P. GAILLET © 2013 – Centre de Pyrolyse de Marienau – All rights reserved for all countries Cannot be disclosed, used or reproduced without prior written specific authorization of CPM CONFIDENTIAL – Privileged Information - CPM 's proprietary information Years of Research and Development At Centre de Pyrolyse de Marienau 65 More than Heating flue inspection

5/04/13 12 COMA Conference 2013 J.P. GAILLET © 2013 – Centre de Pyrolyse de Marienau – All rights reserved for all countries Cannot be disclosed, used or reproduced without prior written specific authorization of CPM CONFIDENTIAL – Privileged Information - CPM 's proprietary information Years of Research and Development At Centre de Pyrolyse de Marienau 65 More than Scissor flue inspection

5/04/13 13 COMA Conference 2013 J.P. GAILLET © 2013 – Centre de Pyrolyse de Marienau – All rights reserved for all countries Cannot be disclosed, used or reproduced without prior written specific authorization of CPM CONFIDENTIAL – Privileged Information - CPM 's proprietary information Years of Research and Development At Centre de Pyrolyse de Marienau 65 More than Robot for regenerator inspection n Objectives  To rapidly assess the regenerator conditions  To define maintenance work and priorities  To control the efficiency of the maintenance work n Inspection of the regenerator sole flue and bottom checker bricks  From the waste gas box openings  With a robot

5/04/13 14 COMA Conference 2013 J.P. GAILLET © 2013 – Centre de Pyrolyse de Marienau – All rights reserved for all countries Cannot be disclosed, used or reproduced without prior written specific authorization of CPM CONFIDENTIAL – Privileged Information - CPM 's proprietary information Years of Research and Development At Centre de Pyrolyse de Marienau 65 More than Robot characteristics (1/2) n Two cameras  One with an axial view  The other with a lateral view and a rotation mechanism n Additional light around the camera heads n Elecronic cards for multiplexing n Different carriers to fit with the different flue dimensions

5/04/13 15 COMA Conference 2013 J.P. GAILLET © 2013 – Centre de Pyrolyse de Marienau – All rights reserved for all countries Cannot be disclosed, used or reproduced without prior written specific authorization of CPM CONFIDENTIAL – Privileged Information - CPM 's proprietary information Years of Research and Development At Centre de Pyrolyse de Marienau 65 More than Robot characteristics (2/2) n Automatic or manual moving inside the flue through a semi- rigid cable n Air blowing n Trolley including  Enroller  Motorization  Air filter  Distance counter n Visu-case  Superimposing of temperature and location of the robot on the image

5/04/13 16 COMA Conference 2013 J.P. GAILLET © 2013 – Centre de Pyrolyse de Marienau – All rights reserved for all countries Cannot be disclosed, used or reproduced without prior written specific authorization of CPM CONFIDENTIAL – Privileged Information - CPM 's proprietary information Years of Research and Development At Centre de Pyrolyse de Marienau 65 More than Performances n Dimensions of the robot  8 cm (height) x 8 cm (width) x 35 cm (length) n Insertion length  Up to 10 m n Automatic moving  Adjustable speed  From 0.1 to 0.3 m/s n Black and white microcameras  Field of view of 34° x 26° n Automatic focusing n Residence time  Up to 5 minutes at 300°C

5/04/13 17 COMA Conference 2013 J.P. GAILLET © 2013 – Centre de Pyrolyse de Marienau – All rights reserved for all countries Cannot be disclosed, used or reproduced without prior written specific authorization of CPM CONFIDENTIAL – Privileged Information - CPM 's proprietary information Years of Research and Development At Centre de Pyrolyse de Marienau 65 More than Regenerator sole flue and bottom checker bricks Regenerator sole flue (axial view) Broken checker bricks (lateral view)

5/04/13 18 COMA Conference 2013 J.P. GAILLET © 2013 – Centre de Pyrolyse de Marienau – All rights reserved for all countries Cannot be disclosed, used or reproduced without prior written specific authorization of CPM CONFIDENTIAL – Privileged Information - CPM 's proprietary information Years of Research and Development At Centre de Pyrolyse de Marienau 65 More than Regenerator sole flue and bottom checker bricks Checker bricks partially or fully clogged by deposits Generally 2 observations are done, the first with the light on, the second with the light off

5/04/13 19 COMA Conference 2013 J.P. GAILLET © 2013 – Centre de Pyrolyse de Marienau – All rights reserved for all countries Cannot be disclosed, used or reproduced without prior written specific authorization of CPM CONFIDENTIAL – Privileged Information - CPM 's proprietary information Years of Research and Development At Centre de Pyrolyse de Marienau 65 More than Regenerator inspection

5/04/13 20 COMA Conference 2013 J.P. GAILLET © 2013 – Centre de Pyrolyse de Marienau – All rights reserved for all countries Cannot be disclosed, used or reproduced without prior written specific authorization of CPM CONFIDENTIAL – Privileged Information - CPM 's proprietary information Years of Research and Development At Centre de Pyrolyse de Marienau 65 More than Conclusion Different instruments are available for coke oven inspection Videofil ® machine is the most used equipment  To assess at regular intervals the refractory conditions and follow its evolution with time  To define the type and the extent of the repair work  To control the repair work after completion and its efficiency Robot is used  To assess regenerator conditions, dirtying of checker bricks  To optimize maintenance planning and cleaning efficiency Both machines contribute  To extend coke oven service life  To optimize repair cost

5/04/13 21 COMA Conference 2013 J.P. GAILLET © 2013 – Centre de Pyrolyse de Marienau – All rights reserved for all countries Cannot be disclosed, used or reproduced without prior written specific authorization of CPM CONFIDENTIAL – Privileged Information - CPM 's proprietary information Years of Research and Development At Centre de Pyrolyse de Marienau 65 More than Acknowledgements Part of this research leading to these results has received funding from the European Union Research Programme of the Research Fund for Coal and Steel, Research Project, Contract RFCR- CT

5/04/13 22 COMA Conference 2013 J.P. GAILLET © 2013 – Centre de Pyrolyse de Marienau – All rights reserved for all countries Cannot be disclosed, used or reproduced without prior written specific authorization of CPM CONFIDENTIAL – Privileged Information - CPM 's proprietary information Years of Research and Development At Centre de Pyrolyse de Marienau 65 More than Thank you for your attention