JPS6479315A - Method for refining molten metal - Google Patents

Method for refining molten metal

Info

Publication number
JPS6479315A
JPS6479315A JP23631287A JP23631287A JPS6479315A JP S6479315 A JPS6479315 A JP S6479315A JP 23631287 A JP23631287 A JP 23631287A JP 23631287 A JP23631287 A JP 23631287A JP S6479315 A JPS6479315 A JP S6479315A
Authority
JP
Japan
Prior art keywords
molten metal
powder
slag
layer
refining
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.)
Pending
Application number
JP23631287A
Other languages
Japanese (ja)
Inventor
Kazunori Yamate
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 JP23631287A priority Critical patent/JPS6479315A/en
Publication of JPS6479315A publication Critical patent/JPS6479315A/en
Pending 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 decrease the temp. drop of molten metal and to prevent the recontamination of the molten metal by blowing powder to the molten metal to refine the molten metal and forming a layer of powder which has the sp. gr. smaller than that of the molten metal and larger than that of slag between the molten metal and the slag at the end period of refining. CONSTITUTION:The powder is blown together with a high-pressure gas from a powder tank 4 through an injection lance 6 into the molten metal 2 housed in a ladle 1 to remove the impurities in the molten metal 2 into the slag 3 and to refine the molten metal. The powder of TiN of the like which has the sp. gr. smaller than that of the molten metal 2 and larger than that of the slag 3, is inert in chemical reaction and does not melt is added from a powder tank 5 to the molten metal 2 at the end period of powder blowing in the above- mentioned method for refining the molten metal. This powder floats to form a powder layer 7 between the molten metal 2 and the slag 3. The thickness of the layer 7 is thereafter uniformized by an Air bubbling device 8. The recontamination and suspension contamination of the molten metal are thereby surely prevented and the drop of the molten metal temp. is decreased.
JP23631287A 1987-09-22 1987-09-22 Method for refining molten metal Pending JPS6479315A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP23631287A JPS6479315A (en) 1987-09-22 1987-09-22 Method for refining molten metal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP23631287A JPS6479315A (en) 1987-09-22 1987-09-22 Method for refining molten metal

Publications (1)

Publication Number Publication Date
JPS6479315A true JPS6479315A (en) 1989-03-24

Family

ID=16998933

Family Applications (1)

Application Number Title Priority Date Filing Date
JP23631287A Pending JPS6479315A (en) 1987-09-22 1987-09-22 Method for refining molten metal

Country Status (1)

Country Link
JP (1) JPS6479315A (en)

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