JPS5655511A - Desiliconization method of molten iron - Google Patents

Desiliconization method of molten iron

Info

Publication number
JPS5655511A
JPS5655511A JP12908779A JP12908779A JPS5655511A JP S5655511 A JPS5655511 A JP S5655511A JP 12908779 A JP12908779 A JP 12908779A JP 12908779 A JP12908779 A JP 12908779A JP S5655511 A JPS5655511 A JP S5655511A
Authority
JP
Japan
Prior art keywords
oxygen
ratio
region
gaseous oxygen
solid
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
JP12908779A
Other languages
Japanese (ja)
Other versions
JPS5754524B2 (en
Inventor
Yukiyoshi Ito
Shingo Sato
Yuji Kawachi
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 JP12908779A priority Critical patent/JPS5655511A/en
Publication of JPS5655511A publication Critical patent/JPS5655511A/en
Publication of JPS5754524B2 publication Critical patent/JPS5754524B2/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)

Abstract

PURPOSE: To decrease slag amount and enhance the degree of freedom in using raw materials by making the ratio of gaseous oxygen as an oxygen source larger than the ratio of solid oxygen in a high Si region and making the ratio of solid oxygen larger than the ratio of gaseous oxygen in a low Si region.
CONSTITUTION: In the pretreatment of molten iron by adding gaseous oxygen and solid oxygen into molten iron, and accelerating desiliconization reaction in preference to other components, the ratio of gaseous oxygen is made larger than the ratio of addition of a solid oxygen source in the high Si region of an initial stage to accelerate de-Si and prevent the decrease in bath temperature. When the de-Si progresses to a low Si region, the addition ratio of solid oxygen is successively made larger than the ratio of gaseous oxygen. The rate of substitution of gaseous oxygen for the entire supply oxygen is set according to the predetermined empirical formula by estimating the secular change of Si during treatment from actually measured data.
COPYRIGHT: (C)1981,JPO&Japio
JP12908779A 1979-10-06 1979-10-06 Desiliconization method of molten iron Granted JPS5655511A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12908779A JPS5655511A (en) 1979-10-06 1979-10-06 Desiliconization method of molten iron

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12908779A JPS5655511A (en) 1979-10-06 1979-10-06 Desiliconization method of molten iron

Publications (2)

Publication Number Publication Date
JPS5655511A true JPS5655511A (en) 1981-05-16
JPS5754524B2 JPS5754524B2 (en) 1982-11-18

Family

ID=15000747

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12908779A Granted JPS5655511A (en) 1979-10-06 1979-10-06 Desiliconization method of molten iron

Country Status (1)

Country Link
JP (1) JPS5655511A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5827916A (en) * 1981-08-12 1983-02-18 Kawasaki Steel Corp Desiliconizing method for molten iron
JPS58224105A (en) * 1982-06-21 1983-12-26 Kawasaki Steel Corp Preliminary treatment of molten iron

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4981248B2 (en) * 2004-11-15 2012-07-18 Ｊｆｅスチール株式会社 Hot metal processing method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5827916A (en) * 1981-08-12 1983-02-18 Kawasaki Steel Corp Desiliconizing method for molten iron
JPS58224105A (en) * 1982-06-21 1983-12-26 Kawasaki Steel Corp Preliminary treatment of molten iron
JPS6225725B2 (en) * 1982-06-21 1987-06-04 Kawasaki Steel Co

Also Published As

Publication number Publication date
JPS5754524B2 (en) 1982-11-18

Similar Documents

Publication Publication Date Title
ES486145A1 (en) Argon in the basic oxygen process to control slopping
JPS5655511A (en) Desiliconization method of molten iron
DE2961503D1 (en) Process for the treatment of molten metal
US3076703A (en) Manufacture of steel
JPS5354196A (en) Treating method for converter slag
JPS51115218A (en) Dephosphorization of molten iron
JPS541221A (en) Method of dephosphorizing molten iron
ES8100349A1 (en) A method for increasing vessel lining life for basic oxygen furnaces.
JPS5337120A (en) Operating method for converter
JPS5591909A (en) Decarburizing method for molten cast iron
JPS5754216A (en) Production of low solved aluminum steel
JPS5644705A (en) Direct reducing method of ore in converter
JPS5261109A (en) Converter operation method
JPS54118319A (en) Preparing low boron stainless steel
JPS53125215A (en) Dephosphorizing method for molten high chromium steel
GB945312A (en) Method of producing pig iron or ferrous alloys in a blast furnace
JPS5792118A (en) Desiliconization method for molten iron
JPS5591921A (en) Manufacture of low hydrogen steel
JPS5439314A (en) Method of manufacturing highly pure silicon iron
JPS56169716A (en) Removal of si from molten pig iron by blowing of oxygen gas
JPS5220308A (en) Apparatus for continuously supplying raw materials in steel making
JPS5377896A (en) Converter slag treating method
JPS6447805A (en) Production of silicon-containing cast iron
JPS5244715A (en) Continuous method of refining molten iron alloy by using alkali metal compoun
JPS51135814A (en) Method for operating blast furnace