JPS563613A - Feeding method of basicity-control sand into converter - Google Patents

Feeding method of basicity-control sand into converter

Info

Publication number
JPS563613A
JPS563613A JP7725279A JP7725279A JPS563613A JP S563613 A JPS563613 A JP S563613A JP 7725279 A JP7725279 A JP 7725279A JP 7725279 A JP7725279 A JP 7725279A JP S563613 A JPS563613 A JP S563613A
Authority
JP
Japan
Prior art keywords
slag
basicity
converter
molten slag
molten
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
JP7725279A
Other languages
Japanese (ja)
Other versions
JPS5839886B2 (en
Inventor
Hitoshi Morishita
Jun Nagai
Fumio Sudo
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 JP54077252A priority Critical patent/JPS5839886B2/en
Publication of JPS563613A publication Critical patent/JPS563613A/en
Publication of JPS5839886B2 publication Critical patent/JPS5839886B2/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
    • 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
    • C21C5/30—Regulating or controlling the blowing
    • C21C5/34—Blowing through the bath

Landscapes

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

Abstract

PURPOSE:To control the basicity of molten slag with high accuracy by blowing the SiO2-contained ore such as silica sand into the molten metal through the bottom tuyeres at the bottom blowing converter operation thereby adding the same into the molten slag at a high yield. CONSTITUTION:Molten slag is made to have high basicity in order to let desulphurization and dephosphorization be accomplished in the bottom blowing converter. Since this high-basicity molten slag has a high CaO content and is not good in slag- off, inexpensive slag-forming agents of a high SiO2 content such as silica sand are added. In this case, the SiO2-base slag-forming agents having been sized to fine particles of 1mm. or less are blown together with oxygen gas or inert gas into the molten metal through the refining-oxygen-blowing central pipe of the double tuyeres of the converter bottom. Since slag-forming agents are not blown from the upper part of the converter, they will not be sucked by a dust collector and are melted into the molten slag at an extremely high yield, thus the basicity of the molten slag may be made to the target value at a high success ratio.
JP54077252A 1979-06-19 1979-06-19 Basicity adjustment method for bottom blowing converter Expired JPS5839886B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP54077252A JPS5839886B2 (en) 1979-06-19 1979-06-19 Basicity adjustment method for bottom blowing converter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP54077252A JPS5839886B2 (en) 1979-06-19 1979-06-19 Basicity adjustment method for bottom blowing converter

Publications (2)

Publication Number Publication Date
JPS563613A true JPS563613A (en) 1981-01-14
JPS5839886B2 JPS5839886B2 (en) 1983-09-02

Family

ID=13628657

Family Applications (1)

Application Number Title Priority Date Filing Date
JP54077252A Expired JPS5839886B2 (en) 1979-06-19 1979-06-19 Basicity adjustment method for bottom blowing converter

Country Status (1)

Country Link
JP (1) JPS5839886B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62106284U (en) * 1985-12-24 1987-07-07

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4820711A (en) * 1971-07-19 1973-03-15

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4820711A (en) * 1971-07-19 1973-03-15

Also Published As

Publication number Publication date
JPS5839886B2 (en) 1983-09-02

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