公开(公告)号：US20190218631A1

公开(公告)日：2019-07-18

申请号：US15873616

申请日：2018-01-17

Applicant: Air Products and Chemicals, Inc.

Inventor： Gregory J. Buragino ,  Shailesh Pradeep Gangoli ,  Anshu Gupta ,  Anup Vasant Sane ,  Avishek Guha ,  Xiaoyi He ,  Michael David Buzinski ,  Kyle J. Niemkiewicz ,  Russell James Hewertson

IPC: C21C5/48 ,  B22D1/00 ,  C21C5/34

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.

公开(公告)号：US10781499B2

公开(公告)日：2020-09-22

申请号：US15873616

申请日：2018-01-17

Applicant: Air Products and Chemicals, Inc.

Inventor： Gregory J. Buragino ,  Shailesh Pradeep Gangoli ,  Anshu Gupta ,  Anup Vasant Sane ,  Avishek Guha ,  Xiaoyi He ,  Michael David Buzinski ,  Kyle J. Niemkiewicz ,  Russell James Hewertson

IPC: C21C5/48 ,  C21C5/34 ,  C21C5/35 ,  C21C7/072

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.