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.

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：US11441206B2

公开(公告)日：2022-09-13

申请号：US15989945

申请日：2018-05-25

Applicant: Air Products and Chemicals, Inc.

Inventor： Shailesh Pradeep Gangoli ,  Avishek Guha ,  Anshu Gupta ,  Reed Jacob Hendershot ,  Michael J. Gallagher ,  Martin Lawrence ,  Petr Tlamicha

IPC: C03B5/225 ,  C22B1/00 ,  C03B3/02 ,  C03C1/00

Abstract: A system and method of controlling a metal melting process in a melting furnace, including determining at least one furnace parameter characterizing a melting furnace, adding a charge containing solid metal into the melting furnace, detecting at least one charge parameter characterizing the charge, firing a burner into the melting furnace to provide heat to melt the charge, and exhausting burner combustion products from the furnace, detecting at least one process parameter characterizing progress of melting the charge, calculating a furnace efficiency based on the at least one furnace parameter, calculating a predicted process pour readiness time based on the at least one charge parameter, the at least one process parameter, and the furnace efficiency, and controlling the metal melting process based on the predicted process pour readiness time.