JPS5732319A - Method for dephosphorization and desulfurization of molten iron containing chromium - Google Patents

Method for dephosphorization and desulfurization of molten iron containing chromium

Info

Publication number
JPS5732319A
JPS5732319A JP10653880A JP10653880A JPS5732319A JP S5732319 A JPS5732319 A JP S5732319A JP 10653880 A JP10653880 A JP 10653880A JP 10653880 A JP10653880 A JP 10653880A JP S5732319 A JPS5732319 A JP S5732319A
Authority
JP
Japan
Prior art keywords
dephosphorization
molten iron
flux
cacl
mgcl
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.)
Granted
Application number
JP10653880A
Other languages
Japanese (ja)
Other versions
JPS5755761B2 (en
Inventor
Toru Matsuo
Ryuka Ikeda
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 JP10653880A priority Critical patent/JPS5732319A/en
Publication of JPS5732319A publication Critical patent/JPS5732319A/en
Publication of JPS5755761B2 publication Critical patent/JPS5755761B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
  • Treatment Of Steel In Its Molten State (AREA)

Abstract

PURPOSE: To perform effective dephosphorization and desulfurization having no losses of Cr components by adding flux consisting of CaCl2 or MgCl2, alkaline earth metal oxide and chromium oxide to Cr-contg. molten iron.
CONSTITUTION: As an oxidizer for dephosphorization of molten iron contg. ≥3% Cr, a proper amount of chromium oxide is optimum, and its oxidation power is not so strong and it per se is reduced to Cr. However, Cr2O3 is of a high m. p., and therefore about ≤30% of the flux is required and it is added little by little together with flux consisting of one or more kinds of CaCl2, MgCl2 and alkaline earth metallic oxide, so that the oxidation of phosphorus and the rate of reduction thereof can follow up the rate of addition. As chromium oxide, Cr2O3 and CrO are usable; the former is stronger in oxidation power than the latter, and it is more desirable to preliminary reduce this to CrO by H2 or C. The alkaline earth metallic oxide is fixed at acidic P2O5 and the CaCl2 and MgCl2 are flux.
COPYRIGHT: (C)1982,JPO&Japio
JP10653880A 1980-08-02 1980-08-02 Method for dephosphorization and desulfurization of molten iron containing chromium Granted JPS5732319A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10653880A JPS5732319A (en) 1980-08-02 1980-08-02 Method for dephosphorization and desulfurization of molten iron containing chromium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10653880A JPS5732319A (en) 1980-08-02 1980-08-02 Method for dephosphorization and desulfurization of molten iron containing chromium

Publications (2)

Publication Number Publication Date
JPS5732319A true JPS5732319A (en) 1982-02-22
JPS5755761B2 JPS5755761B2 (en) 1982-11-26

Family

ID=14436155

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10653880A Granted JPS5732319A (en) 1980-08-02 1980-08-02 Method for dephosphorization and desulfurization of molten iron containing chromium

Country Status (1)

Country Link
JP (1) JPS5732319A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61133308A (en) * 1984-12-01 1986-06-20 Nippon Steel Corp Dephosphorizing method of molten steel containing chromium
JP2008214711A (en) * 2007-03-06 2008-09-18 Nippon Steel Corp Method for desulfurizing chromium-containing molten iron

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5085821U (en) * 1973-12-10 1975-07-22
JPS52132445A (en) * 1976-04-28 1977-11-07 Sumitomo Rubber Ind Safety device for gas heater

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5085821U (en) * 1973-12-10 1975-07-22
JPS52132445A (en) * 1976-04-28 1977-11-07 Sumitomo Rubber Ind Safety device for gas heater

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61133308A (en) * 1984-12-01 1986-06-20 Nippon Steel Corp Dephosphorizing method of molten steel containing chromium
JP2008214711A (en) * 2007-03-06 2008-09-18 Nippon Steel Corp Method for desulfurizing chromium-containing molten iron

Also Published As

Publication number Publication date
JPS5755761B2 (en) 1982-11-26

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