JPS5672111A - Separate tapping method for molten steel and slag, and its apparatus - Google Patents

Separate tapping method for molten steel and slag, and its apparatus

Info

Publication number
JPS5672111A
JPS5672111A JP14638579A JP14638579A JPS5672111A JP S5672111 A JPS5672111 A JP S5672111A JP 14638579 A JP14638579 A JP 14638579A JP 14638579 A JP14638579 A JP 14638579A JP S5672111 A JPS5672111 A JP S5672111A
Authority
JP
Japan
Prior art keywords
slag
molten steel
passage
tapping
furnace body
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
JP14638579A
Other languages
Japanese (ja)
Other versions
JPS5713605B2 (en
Inventor
Kyoji Nakanishi
Kenji Saito
Hideo Nakamura
Toshihiko Emi
Tsutomu Nozaki
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.)
JFE Steel Corp
Original Assignee
Kawasaki 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 Kawasaki Steel Corp filed Critical Kawasaki Steel Corp
Priority to JP14638579A priority Critical patent/JPS5672111A/en
Publication of JPS5672111A publication Critical patent/JPS5672111A/en
Publication of JPS5713605B2 publication Critical patent/JPS5713605B2/ja
Granted 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
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/28—Manufacture of steel in the converter
    • C21C5/42—Constructional features of converters
    • C21C5/46—Details or accessories
    • C21C5/4653—Tapholes; Opening or plugging thereof

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)

Abstract

PURPOSE:To prevent flowing out of slag and to improve available percentage of molten steel, by detecting arriving of slag in the tapping passage from the reduced speed of molten steel flow at the last period of molten steel taking out work and by adjusting tilting angle of the furnace body in accordance with the detected signal. CONSTITUTION:When slag 7 comes out into descending passage 8 of tapping passage 5 at the last period of molten steel taking out work, a sudden reduction in the flowing speed of molten steel occurs due to a density variation at the curved section of tapping passage, because of the molten steel remained in the ascending passage 12 of curved section. Measuring terminals 9 and 9' detect arriving of slag 7 through variation in electric resistance generated by penetration of slag 7 into descending passage 8. When this detecting signal is received tilting of furnace body 1 is restored toward the original state by driving the converter driving motor through a prescribed electric circuit. As a result, disadvantages, such as rephosphorization caused by admixture of slag which could not be avoided before, lowering of available percentage of adding alloy, wear of ladle refractories, etc., can be solved.
JP14638579A 1979-11-14 1979-11-14 Separate tapping method for molten steel and slag, and its apparatus Granted JPS5672111A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14638579A JPS5672111A (en) 1979-11-14 1979-11-14 Separate tapping method for molten steel and slag, and its apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14638579A JPS5672111A (en) 1979-11-14 1979-11-14 Separate tapping method for molten steel and slag, and its apparatus

Publications (2)

Publication Number Publication Date
JPS5672111A true JPS5672111A (en) 1981-06-16
JPS5713605B2 JPS5713605B2 (en) 1982-03-18

Family

ID=15406498

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14638579A Granted JPS5672111A (en) 1979-11-14 1979-11-14 Separate tapping method for molten steel and slag, and its apparatus

Country Status (1)

Country Link
JP (1) JPS5672111A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5831017A (en) * 1981-08-15 1983-02-23 Nisshin Steel Co Ltd Slag detecting method in molten metal vessel
JPS5831019A (en) * 1981-08-15 1983-02-23 Nisshin Steel Co Ltd Slag detecting method of molten metal vessel

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5831017A (en) * 1981-08-15 1983-02-23 Nisshin Steel Co Ltd Slag detecting method in molten metal vessel
JPS5831019A (en) * 1981-08-15 1983-02-23 Nisshin Steel Co Ltd Slag detecting method of molten metal vessel

Also Published As

Publication number Publication date
JPS5713605B2 (en) 1982-03-18

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