The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 22, 2020
Filed:
Jan. 17, 2018
Air Products and Chemicals, Inc., Allentown, PA (US);
Gregory J. Buragino, Macungie, PA (US);
Shailesh Pradeep Gangoli, Easton, PA (US);
Anshu Gupta, Whitehall, PA (US);
Anup Vasant Sane, Allentown, PA (US);
Avishek Guha, Breinigsville, PA (US);
Xiaoyi He, Orefield, PA (US);
Michael David Buzinski, Slatington, PA (US);
Kyle J. Niemkiewicz, Coopersburg, PA (US);
Russell James Hewertson, Wescosville, PA (US);
Air Products and Chemicals, Inc., Allentown, PA (US);
Abstract
A method of operating a BOF bottom stir tuyere having an inner nozzle surrounded by an annular nozzle, including during a hot metal pour phase and a blow phase, flowing an inert gas through both nozzles; during a tap phase, initiating a flow of a first reactant through the inner nozzle and a flow of a second reactant through the annular nozzle, and ceasing the flow of inert gas through the nozzles, wherein the first and second reactants includes fuel and oxidant, respectively, or vice-versa, such that a flame forms as the fuel and oxidant exit the tuyere; during a slag splash phase, continuing the flows of fuel and oxidant to maintain the flame; and after ending the slag splash phase and commencement of another hot metal pour phase, initiating a flow of inert gas through both nozzles and ceasing the flows of the first and second reactants.