JPS5779107A - Method for utilizing sludge for neutralization of waste fluoronitric acid - Google Patents

Method for utilizing sludge for neutralization of waste fluoronitric acid

Info

Publication number
JPS5779107A
JPS5779107A JP15549880A JP15549880A JPS5779107A JP S5779107 A JPS5779107 A JP S5779107A JP 15549880 A JP15549880 A JP 15549880A JP 15549880 A JP15549880 A JP 15549880A JP S5779107 A JPS5779107 A JP S5779107A
Authority
JP
Japan
Prior art keywords
waste
fluoronitric acid
neutralized sludge
molten iron
sludge
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
JP15549880A
Other languages
Japanese (ja)
Inventor
Kazuhito Kurachi
Terumi Oda
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
Sumitomo Metal Industries Ltd
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 Sumitomo Metal Industries Ltd filed Critical Sumitomo Metal Industries Ltd
Priority to JP15549880A priority Critical patent/JPS5779107A/en
Publication of JPS5779107A publication Critical patent/JPS5779107A/en
Pending 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
    • C21C1/00—Refining of pig-iron; Cast iron
    • C21C1/02—Dephosphorising or desulfurising
    • C21C1/025—Agents used for dephosphorising or desulfurising

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)

Abstract

PURPOSE:To reutilize neutralized sludge and to prevent the elution of Fe, Ni, Cr, F, etc. therein by adding the neutralized sludge into molten iron after drying. CONSTITUTION:In the pickling treatment of, for example, stainless steel, by a fluoronitric acid, the degraded waste fluoronitric acid soln. (waste fluoronitric acid) contg. Fe, Ni, Cr, F, etc. is produced. The neutralized sludge produced by neutralizing this with Ca(OH)2 is dried. Since the neutralized sludge after drying has a high content of CaF2, this is effectively utilized when it is added into molten iron as a substitute for an accelerator for slag making of a desulfurizing agent for molten iron. The above-described elements such as Fe, Ni, and the like in the neutralized sludge are confined into the slag produced during desulfurization, whereby their elution is prevented.
JP15549880A 1980-11-04 1980-11-04 Method for utilizing sludge for neutralization of waste fluoronitric acid Pending JPS5779107A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15549880A JPS5779107A (en) 1980-11-04 1980-11-04 Method for utilizing sludge for neutralization of waste fluoronitric acid

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15549880A JPS5779107A (en) 1980-11-04 1980-11-04 Method for utilizing sludge for neutralization of waste fluoronitric acid

Publications (1)

Publication Number Publication Date
JPS5779107A true JPS5779107A (en) 1982-05-18

Family

ID=15607356

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15549880A Pending JPS5779107A (en) 1980-11-04 1980-11-04 Method for utilizing sludge for neutralization of waste fluoronitric acid

Country Status (1)

Country Link
JP (1) JPS5779107A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007128864A1 (en) * 2006-05-10 2007-11-15 Outokumpu Oyj Method in connection with steel production
JP2007532773A (en) * 2004-04-07 2007-11-15 オウトクンプ ステンレス アクチェボラーク Steel production methods

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007532773A (en) * 2004-04-07 2007-11-15 オウトクンプ ステンレス アクチェボラーク Steel production methods
US7744674B2 (en) * 2004-04-07 2010-06-29 Outokumpu Oyj Method in connection with steel production
US8246716B2 (en) 2004-04-07 2012-08-21 Outokumpu Oyj Method in connection with steel production
KR101241492B1 (en) * 2004-04-07 2013-03-13 오또꿈뿌 오와이제이 Method in connection with steel production
WO2007128864A1 (en) * 2006-05-10 2007-11-15 Outokumpu Oyj Method in connection with steel production
EA014405B1 (en) * 2006-05-10 2010-12-30 Отокумпу Оюй Method for production of fluxing agent in connection with steel production
US8278496B2 (en) 2006-05-10 2012-10-02 Outokumpu Oyj Method in connection with steel production

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