JPS57171612A - Quick decision method for expansion collapsing property of converter slag - Google Patents

Quick decision method for expansion collapsing property of converter slag

Info

Publication number
JPS57171612A
JPS57171612A JP5503681A JP5503681A JPS57171612A JP S57171612 A JPS57171612 A JP S57171612A JP 5503681 A JP5503681 A JP 5503681A JP 5503681 A JP5503681 A JP 5503681A JP S57171612 A JPS57171612 A JP S57171612A
Authority
JP
Japan
Prior art keywords
converter slag
expansion
collapsing property
slag
road material
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
JP5503681A
Other languages
Japanese (ja)
Inventor
Arifumi Araida
Masaaki Matsushima
Chiyoji Fuji
Sadao Saida
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.)
SEISHIN SANGYO KK
Nippon Steel Corp
Original Assignee
SEISHIN SANGYO KK
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 SEISHIN SANGYO KK, Nippon Steel Corp filed Critical SEISHIN SANGYO KK
Priority to JP5503681A priority Critical patent/JPS57171612A/en
Publication of JPS57171612A publication Critical patent/JPS57171612A/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
    • 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
    • C21C5/36—Processes yielding slags of special composition

Landscapes

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

Abstract

PURPOSE:To decide whether converter slag is adequate or inadequate as a road material by expansion collapsing property quickly in the stage of measuring the expansion collapsing property of the converter slag by drying the compaction molding of the slag in a dryer under specific conditions and observing the cracking of the surface thereof. CONSTITUTION:Whether converter slag is usable as a material for roads or not on account of its expansion collapse by the hydration reaction of unslagged lime, etc. contained thereon, and the result thereof is used as a criterion for shipping. In this case, the sample of the converter slag is allowed to dry about overnight, after which it is sieved away of fine powder and is thereby controlled of grain sizes. This is controlled of moisture so as to have opitmum containing ratios, and is compacted in a mold, after which the molding is removed from the mold and is put in a dryer and is dried for about 18-48 hours at 50-80 deg.C. The expansion collapsing property by the hydration of the unslagged free CaO in the converter slag is decided from the cracking generated at this time, and whether it is usable as a road material or not is quickly determined. The result thereof is used as a criterion for shipping of the converter slag as a road material.
JP5503681A 1981-04-14 1981-04-14 Quick decision method for expansion collapsing property of converter slag Pending JPS57171612A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5503681A JPS57171612A (en) 1981-04-14 1981-04-14 Quick decision method for expansion collapsing property of converter slag

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5503681A JPS57171612A (en) 1981-04-14 1981-04-14 Quick decision method for expansion collapsing property of converter slag

Publications (1)

Publication Number Publication Date
JPS57171612A true JPS57171612A (en) 1982-10-22

Family

ID=12987425

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5503681A Pending JPS57171612A (en) 1981-04-14 1981-04-14 Quick decision method for expansion collapsing property of converter slag

Country Status (1)

Country Link
JP (1) JPS57171612A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014157019A (en) * 2013-02-14 2014-08-28 Nippon Steel & Sumitomo Metal Method for estimating quantity of easily expandable quicklime in steel slag
JP2018025461A (en) * 2016-08-10 2018-02-15 Ｊｆｅスチール株式会社 Water immersion expansion determination method of steel making slag, and manufacturing method of slag roadbed material
JP2021012053A (en) * 2019-07-04 2021-02-04 濱田重工株式会社 Hydration expansion behavior evaluation method of steel making slag and steam aging device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014157019A (en) * 2013-02-14 2014-08-28 Nippon Steel & Sumitomo Metal Method for estimating quantity of easily expandable quicklime in steel slag
JP2018025461A (en) * 2016-08-10 2018-02-15 Ｊｆｅスチール株式会社 Water immersion expansion determination method of steel making slag, and manufacturing method of slag roadbed material
JP2021012053A (en) * 2019-07-04 2021-02-04 濱田重工株式会社 Hydration expansion behavior evaluation method of steel making slag and steam aging device

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