JPS5541933A - Dephosphorization and desiliconization method of hot metal - Google Patents

Dephosphorization and desiliconization method of hot metal

Info

Publication number
JPS5541933A
JPS5541933A JP11414378A JP11414378A JPS5541933A JP S5541933 A JPS5541933 A JP S5541933A JP 11414378 A JP11414378 A JP 11414378A JP 11414378 A JP11414378 A JP 11414378A JP S5541933 A JPS5541933 A JP S5541933A
Authority
JP
Japan
Prior art keywords
slag
hot metal
content
converter
sio2
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
JP11414378A
Other languages
Japanese (ja)
Inventor
Susumu Aida
Hitoshi Ono
Akira Inagaki
Tamenori Masui
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
Nippon Steel Corp
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 Nippon Steel Corp filed Critical Nippon Steel Corp
Priority to JP11414378A priority Critical patent/JPS5541933A/en
Publication of JPS5541933A publication Critical patent/JPS5541933A/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
    • C21C1/02—Dephosphorising or desulfurising

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 dephosphorize the hot metal, by adding converter slag having high iron oxide content and low P2O5, SiO2 content to the hot metal discharged from a blast furnace. CONSTITUTION:Converter refined slag containing P2O5 by <1.8%, SiO2 by < 12.5%, (FeO+Fe2O3) by >30%, CaO/SiO2 by >3.5% is added to the hot metal discharged from a blast furnace by 25-100kg per 1 ton of hot metal, depending on the Si content in the hot metal. First, Si is oxidized by iron oxide in the converter slag to desiliconize to less than 0.10%, and the produced SiO2 is compounded with CaO to stabilize. Then, P is oxidized by the iron oxide in the slag to P2O5 to make into a stable slag in the form of (CaO)4P2O5. As for the refined converter slag used in this case, the converter molten slag is cooled slowly, and sorted into two layers differing in the P2O5 content, and the slag of the lower P2O5 content is used.
JP11414378A 1978-09-19 1978-09-19 Dephosphorization and desiliconization method of hot metal Pending JPS5541933A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11414378A JPS5541933A (en) 1978-09-19 1978-09-19 Dephosphorization and desiliconization method of hot metal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11414378A JPS5541933A (en) 1978-09-19 1978-09-19 Dephosphorization and desiliconization method of hot metal

Publications (1)

Publication Number Publication Date
JPS5541933A true JPS5541933A (en) 1980-03-25

Family

ID=14630213

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11414378A Pending JPS5541933A (en) 1978-09-19 1978-09-19 Dephosphorization and desiliconization method of hot metal

Country Status (1)

Country Link
JP (1) JPS5541933A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110144434A (en) * 2019-05-23 2019-08-20 兰州理工大学 A kind of raw material of industry preparation amorphous steel pre-melted slag

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110144434A (en) * 2019-05-23 2019-08-20 兰州理工大学 A kind of raw material of industry preparation amorphous steel pre-melted slag

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