GB1528099A - Process for dephosphorising molten pig iron - Google Patents

Process for dephosphorising molten pig iron

Info

Publication number
GB1528099A
GB1528099A GB4065776A GB4065776A GB1528099A GB 1528099 A GB1528099 A GB 1528099A GB 4065776 A GB4065776 A GB 4065776A GB 4065776 A GB4065776 A GB 4065776A GB 1528099 A GB1528099 A GB 1528099A
Authority
GB
United Kingdom
Prior art keywords
iron
dephosphorizing
molten pig
pig iron
content
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.)
Expired
Application number
GB4065776A
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 GB4065776A priority Critical patent/GB1528099A/en
Publication of GB1528099A publication Critical patent/GB1528099A/en
Expired 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

1528099 Dephosphorizing crude iron SUMITOMO METAL INDUSTRIES Ltd 15 Oct 1976 40657/76 Heading C7D Molten pig iron is dephosphorized prior to conversion into steel by treatment at below 1450‹C with a combination of dephosphorizing and oxidation agents such that a slag is formed having a total iron content of 15 to 50% and in which the ratio CaO/SiO 2 +P 2 O 5 lies within the range 0À3 to 3. The oxidizing additions are such as to remove substantially all Si, Mn and P without reducing the C content of the iron by more than 1À5%. Suitable dephosphorizing agents are lime, limestone and converter slag, while the oxidizing agent may be one or both of iron oxide and oxygen according to temperature considerations. There may also be added up to 15 kg per ton of metal of sodium carbonate and/or fluorspar as flux, while during treatment the bath may be agitated by injection of inert gas or by an impellor.
GB4065776A 1976-10-15 1976-10-15 Process for dephosphorising molten pig iron Expired GB1528099A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB4065776A GB1528099A (en) 1976-10-15 1976-10-15 Process for dephosphorising molten pig iron

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4065776A GB1528099A (en) 1976-10-15 1976-10-15 Process for dephosphorising molten pig iron

Publications (1)

Publication Number Publication Date
GB1528099A true GB1528099A (en) 1978-10-11

Family

ID=10415989

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4065776A Expired GB1528099A (en) 1976-10-15 1976-10-15 Process for dephosphorising molten pig iron

Country Status (1)

Country Link
GB (1) GB1528099A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111670258A (en) * 2018-03-07 2020-09-15 日本制铁株式会社 Method for dephosphorizing molten iron

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111670258A (en) * 2018-03-07 2020-09-15 日本制铁株式会社 Method for dephosphorizing molten iron
CN111670258B (en) * 2018-03-07 2023-01-10 日本制铁株式会社 Method for dephosphorizing molten iron

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Legal Events

Date Code Title Description
PS Patent sealed
PE20 Patent expired after termination of 20 years

Effective date: 19961014