Title:
TOP BLOWING LANCE FOR CONVERTER, METHOD FOR ADDING AUXILIARY RAW MATERIAL, AND METHOD FOR REFINING OF MOLTEN IRON
Document Type and Number:
WIPO Patent Application WO/2022/163121
Kind Code:
A1
Abstract:
The present invention provides a technique for increasing surplus heat and increasing the amount of a cold iron source used in a refining treatment of molten iron. Provided is a top blowing lance for a converter, which is configured such that: a burner equipped with injection holes through which a fuel and a combustion assisting gas are jetted is provided at a tip part of a lance or a tip part of another lance arranged apart from the lance, in which the lance or the another lance can perform the top blowing of an oxidizing gas to molten iron contained in a converter-type container; a powdery auxiliary raw material or an auxiliary raw material that is processed in a powdery form, each of which is blown from the lance or the another lance to the molten iron, passes through flame that is formed by the burner; a predetermined heating time can be secured; and a predetermined powder/fuel ratio can be secured. Also provided are a method for adding an auxiliary raw material and a method for refining molten iron, in each of which the top blowing lance is used.
Inventors:
AMANO SHOTA (JP)
NEGISHI HIDEMITSU (JP)
MURAKAMI YUMI (JP)
OGASAWARA FUTOSHI (JP)
NAKASE KENJI (JP)
NEGISHI HIDEMITSU (JP)
MURAKAMI YUMI (JP)
OGASAWARA FUTOSHI (JP)
NAKASE KENJI (JP)
Application Number:
PCT/JP2021/044302
Publication Date:
August 04, 2022
Filing Date:
December 02, 2021
Export Citation:
Assignee:
JFE STEEL CORP (JP)
International Classes:
C21C5/32; C21C5/46
Domestic Patent References:
| WO2013057927A1 | 2013-04-25 |
Foreign References:
| JP2008179876A | 2008-08-07 | |||
| JP2014084520A | 2014-05-12 | |||
| JP2014189859A | 2014-10-06 | |||
| JP2011038142A | 2011-02-24 | |||
| JPS63169318A | 1988-07-13 | |||
| JP2007138207A | 2007-06-07 | |||
| JP2008179876A | 2008-08-07 |
Other References:
"The Japan Society of Mechanical Engineers", 1986, article "Heat Transfer"
"The Japan Institute of Metals and Materials", 2000, article "Metal Refining"
See also references of EP 4257708A4
"The Japan Institute of Metals and Materials", 2000, article "Metal Refining"
See also references of EP 4257708A4
Attorney, Agent or Firm:
GINZA MARONIE P.C. (JP)
Download PDF:
Previous Patent: CHIP COMPONENT
Next Patent: COMMUNICATION MANAGEMENT DEVICE AND COMMUNICATION MANAGEMENT METHOD
Next Patent: COMMUNICATION MANAGEMENT DEVICE AND COMMUNICATION MANAGEMENT METHOD