| 摘要 |
PROBLEM TO BE SOLVED: To provide an oxygen-enriched blasting method into a blast furnace with which returning compressed oxygen quantity in an oxygen compressor is reduced and energy efficiency can be improved. SOLUTION: The returning compressed oxygen quantity flowing through a returning piping 17 for returning the compressed oxygen to the sucking side from the spouting side in the oxygen compressor 2 is measured, and in the case of exceeding the returning compressed oxygen quantity to a pre-decided prescribed quantity, the opening degree of a second flowing-rate adjusting valve 22 is made to large and the compressed oxygen quantity flowing through the compressed oxygen supplying pipe 16 is increased and also, the opening degree of a first flowing rate adjusting valve 21 is made to little by the increasing quantity of this compressed oxygen to reduce the oxygen quantity for flowing through the oxygen supplying pipe 12. COPYRIGHT: (C)2008,JPO&INPIT
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