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Blast Furnace Operation Method

Patent No. EP2796566 (titled "Blast Furnace Operation Method") was filed by JFE Steel on Mar 1, 2012. The application was issued on Jul 23, 2025.

Patent Summary

A blast furnace operation method that increases combustion temperature and reduces CO2 emissions by injecting pulverized coal through an inner tube of a double wall lance and a combustion-supporting gas through an outer tube, with notches in the inner tube's injecting front end to enhance pulverized coal and gas diffusion and promote contact between the two. The method achieves high combustion efficiency at high pulverized coal ratios by optimizing oxygen concentration in the lance gas to 35-70% by volume, depending on the coal ratio.

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CompanyOpposition DateRepresentative
PAUL WURTHMay 29, 2019OFFICE FREYLINGER

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EP2796566

JFE STEEL
Application Number
EP12860851A
Filing Date
Mar 1, 2012
Status
Patent Maintained As Amended
Jun 20, 2025
Publication Date
Jul 23, 2025
External Links
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