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Coal injection to the tuyère of the blast furnace is a technology widely used in the EEC to decrease ironmaking production costs. Nowadays, the adopted technology has made it possible to reach injection rates of the order of 180 kg of coal/THM, over long periods of time. In the near future, higher injection rates will be required and the present injection practice will no longer be effective. Therefore new techniques based on oxy-coal burners, able to burn coal in a high oxygen content atmosphere, have been developed inside the scope of the present research. The first stage of the experimentation consisted of the design and testing of several kinds of burners. These tests were carried out in an empty oven and the oxy-coal burners were compared with each other and with other types of injection devices. In the second stage, the influence of the incandescent coke of the raceway on coal combustion was also examined. Operating conditions of the trials were calculated with the CRMs simulation model of the blast furnace. In this manner, actual injection rates between 150 and 440 kg of coal/THM could be simulated, with corresponding O(2) content of the blast from 25 to 60 %.

Additional information

Authors: DUFRESNE P, Centre de Recherches Métallurgiques, Liège (BE);PONGHIS N, Centre de Recherches Métallurgiques, Liège (BE)
Bibliographic Reference: EUR 14651 FR (1993) 55 pp., FS, ECU 8.50
Availability: (2)
ISBN: ISBN 92-826-5865-1
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