Title

DEVELOPMENT OF CHANNELING PREDICTION SYSTEM FOR A BLAST FURNACE

DEVELOPMENT OF CHANNELING PREDICTION SYSTEM FOR A BLAST FURNACE

Authorship

Shiau, Jia-Shyan; Wang, Chin-Chung; Ho, Chung-Ken; Tung., Che-Hsiung

Shiau, Jia-Shyan

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Wang, Chin-Chung

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Ho, Chung-Ken

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Tung., Che-Hsiung

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DOI

10.5151/2594-357X-22272

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Abstract

As channeling always results from the uneven gas distribution through burden layers or abnormal gas resistance in BF, it results in abnormal pressure changes. Thus, the visualization technology mainly made of pressure distribution was developed to predict BF channeling phenomena in this study. The real-time data of BF shaft pressure was used to create 3D visual model by neural network algorithms and 3D real-time BF pressure changes was observed. The root mean square deviation (RMSD) of BF shaft pressure was used as an index to set up the predicting criteria of channeling occurrence with the opening of BF AGE (Annular Gap Element), and the predicting system based on the criteria was built. The criteria for channeling alarm were both of the RMSD of BF shaft pressure at L7 (seventh level), and AGE opening greater than 60%. This system has been installed in CSC NO.2 BF, and the test results showed 10 minutes to 15 minutes ahead of channeling can be obtained to adjust BF operation to avoid the occurrence of channeling.

As channeling always results from the uneven gas distribution through burden layers or abnormal gas resistance in BF, it results in abnormal pressure changes. Thus, the visualization technology mainly made of pressure distribution was developed to predict BF channeling phenomena in this study. The real-time data of BF shaft pressure was used to create 3D visual model by neural network algorithms and 3D real-time BF pressure changes was observed. The root mean square deviation (RMSD) of BF shaft pressure was used as an index to set up the predicting criteria of channeling occurrence with the opening of BF AGE (Annular Gap Element), and the predicting system based on the criteria was built. The criteria for channeling alarm were both of the RMSD of BF shaft pressure at L7 (seventh level), and AGE opening greater than 60%. This system has been installed in CSC NO.2 BF, and the test results showed 10 minutes to 15 minutes ahead of channeling can be obtained to adjust BF operation to avoid the occurrence of channeling.

Keywords

Blast furnace; Channeling; Shaft pressure; Visualization; Predicting system.

Blast furnace; Channeling; Shaft pressure; Visualization; Predicting system.