JPS5735604A - Pretreatment of hot iron - Google Patents

Pretreatment of hot iron

Info

Publication number
JPS5735604A
JPS5735604A JP11210480A JP11210480A JPS5735604A JP S5735604 A JPS5735604 A JP S5735604A JP 11210480 A JP11210480 A JP 11210480A JP 11210480 A JP11210480 A JP 11210480A JP S5735604 A JPS5735604 A JP S5735604A
Authority
JP
Japan
Prior art keywords
hot iron
desiliconizing
slag
primarily
blast furnace
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP11210480A
Other languages
Japanese (ja)
Inventor
Nobuyoshi Hiroki
Yujo Marukawa
Hiromitsu Ueki
Hiroyuki Ikemiya
Yoshiyasu Shirota
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Steel Corp
Original Assignee
Sumitomo Metal Industries Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sumitomo Metal Industries Ltd filed Critical Sumitomo Metal Industries Ltd
Priority to JP11210480A priority Critical patent/JPS5735604A/en
Publication of JPS5735604A publication Critical patent/JPS5735604A/en
Pending legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C1/00—Refining of pig-iron; Cast iron
    • C21C1/04—Removing impurities other than carbon, phosphorus or sulfur

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)

Abstract

PURPOSE:To stabilize the operation of a converter and to recover useful components by primarily desiliconizing hot iron discharged into a discharge conduit from a blast furnace, carrying out secondary desiliconization in a suitable container, removing formed slag, and adding a slagging agent based on alkali metallic carbonate to dephosphorize the hot iron. CONSTITUTION:Hot iron discharged into a discharge conduit from a blast furnace is primarily desiliconzed to <= about 0.2% Si content by adding a desiliconizing agent and spraying gaseous oxygen. The desiliconizing agent is further blown together with a carrier gas such as N2 to carry out secondary desiliconization to about 0.1- 0.12% Si content in a suitable container, and formed slag is removed. By adding a slagging agent based on alkali metallic carbonate, the remaining hot iron is dephosphorized. A substance contg. alkali metal, P and V is recovered from slag formed by the dephosphorization.
JP11210480A 1980-08-13 1980-08-13 Pretreatment of hot iron Pending JPS5735604A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11210480A JPS5735604A (en) 1980-08-13 1980-08-13 Pretreatment of hot iron

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11210480A JPS5735604A (en) 1980-08-13 1980-08-13 Pretreatment of hot iron

Publications (1)

Publication Number Publication Date
JPS5735604A true JPS5735604A (en) 1982-02-26

Family

ID=14578234

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11210480A Pending JPS5735604A (en) 1980-08-13 1980-08-13 Pretreatment of hot iron

Country Status (1)

Country Link
JP (1) JPS5735604A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58193307A (en) * 1982-05-07 1983-11-11 Kobe Steel Ltd Control of desiliconation of molten iron
JP2016148075A (en) * 2015-02-12 2016-08-18 新日鐵住金株式会社 Hot metal refining method

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54139819A (en) * 1978-04-24 1979-10-30 Nippon Steel Corp Stabilization treating method for impurities in hot iron to low level
JPS5594410A (en) * 1979-01-13 1980-07-17 Nippon Steel Corp Continuous molten iron pretreating method
JPS5594414A (en) * 1979-01-12 1980-07-17 Nippon Steel Corp Desiliconization method of molten metal

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54139819A (en) * 1978-04-24 1979-10-30 Nippon Steel Corp Stabilization treating method for impurities in hot iron to low level
JPS5594414A (en) * 1979-01-12 1980-07-17 Nippon Steel Corp Desiliconization method of molten metal
JPS5594410A (en) * 1979-01-13 1980-07-17 Nippon Steel Corp Continuous molten iron pretreating method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58193307A (en) * 1982-05-07 1983-11-11 Kobe Steel Ltd Control of desiliconation of molten iron
JP2016148075A (en) * 2015-02-12 2016-08-18 新日鐵住金株式会社 Hot metal refining method

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