JPS5585614A - Desiliconizing method for hot iron under pressure - Google Patents

Desiliconizing method for hot iron under pressure

Info

Publication number
JPS5585614A
JPS5585614A JP15892878A JP15892878A JPS5585614A JP S5585614 A JPS5585614 A JP S5585614A JP 15892878 A JP15892878 A JP 15892878A JP 15892878 A JP15892878 A JP 15892878A JP S5585614 A JPS5585614 A JP S5585614A
Authority
JP
Japan
Prior art keywords
slag
decarburization
press
steel
pig iron
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
JP15892878A
Other languages
Japanese (ja)
Other versions
JPS5717044B2 (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 JP15892878A priority Critical patent/JPS5585614A/en
Publication of JPS5585614A publication Critical patent/JPS5585614A/en
Publication of JPS5717044B2 publication Critical patent/JPS5717044B2/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 restrain the decarburizing reaction from taking place during desilixonization so as to prevent slag foaming, by, in previous desilixonization of pig iron, i.e., a raw material for steel manufacture, for the purpose of restraining slag formation during steel making refining, maintaining the atmosphere at a press. not lower than 1.1 atm.
CONSTITUTION: In refining cast iron into steel in an oxygen steel making furnace, the raw material pig iron is previously desiliconized in order to restrain the slag formation as little as possible. If decarburization takes place simultaneously, C becomes insufficient as the heat source for refining steel, and the viscous molten SiO2 slag causes foaming because of a decarburization product CO, so that the operation is complicated. Hence, the decarburization during the preliminary desiliconization is restrained from taking place as little as possible. To this purpose, a ladle 4 contg. molten pig iron is placed in a press. vessel 3, and the molten pig iron is agitated by an impeller 5 together with an oxidizing agent 6 such as mill scale etc. delivered from a hopper 1 so as to be desiliconized. During the operation the partial press. of CO in the vessel 3 is increased by pressurizing the vessel 3 to about 1.1 atm. by a press -controlling means 2. Hereby the formation of CO because of oxidation of C, i.e., decarburization, is decreased remarkably, and no foaming of SiO2 slag 7 is caused.
COPYRIGHT: (C)1980,JPO&Japio
JP15892878A 1978-12-22 1978-12-22 Desiliconizing method for hot iron under pressure Granted JPS5585614A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15892878A JPS5585614A (en) 1978-12-22 1978-12-22 Desiliconizing method for hot iron under pressure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15892878A JPS5585614A (en) 1978-12-22 1978-12-22 Desiliconizing method for hot iron under pressure

Publications (2)

Publication Number Publication Date
JPS5585614A true JPS5585614A (en) 1980-06-27
JPS5717044B2 JPS5717044B2 (en) 1982-04-08

Family

ID=15682394

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15892878A Granted JPS5585614A (en) 1978-12-22 1978-12-22 Desiliconizing method for hot iron under pressure

Country Status (1)

Country Link
JP (1) JPS5585614A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60125595U (en) * 1984-01-31 1985-08-23 リズム時計工業株式会社 Cam contact mechanism of time signal clock
JPS62155383U (en) * 1986-03-25 1987-10-02

Also Published As

Publication number Publication date
JPS5717044B2 (en) 1982-04-08

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