JPS55141512A - Covering and heat insulating material for molten metal - Google Patents

Covering and heat insulating material for molten metal

Info

Publication number
JPS55141512A
JPS55141512A JP4721479A JP4721479A JPS55141512A JP S55141512 A JPS55141512 A JP S55141512A JP 4721479 A JP4721479 A JP 4721479A JP 4721479 A JP4721479 A JP 4721479A JP S55141512 A JPS55141512 A JP S55141512A
Authority
JP
Japan
Prior art keywords
molten metal
paper
soot
ash
heat insulating
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
JP4721479A
Other languages
Japanese (ja)
Inventor
Masaru Takashima
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.)
AIKOO KK
Aikoh Co Ltd
Original Assignee
AIKOO KK
Aikoh Co 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 AIKOO KK, Aikoh Co Ltd filed Critical AIKOO KK
Priority to JP4721479A priority Critical patent/JPS55141512A/en
Publication of JPS55141512A publication Critical patent/JPS55141512A/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
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

PURPOSE:To enable the prevention of cooling and oxidation of molten metal by using a calcined product or soot ash having a specific particle size which ia obtainable through high-temperature incineration of the waste sludge from paper making process of paper and pulp. CONSTITUTION:The waste sludge discharged from paper making process of paper and pulp is fired at about 600-1,000 deg.C (about 300-1,000 deg.C by conventional methods). The resulted calcined product or soot ash of <20mm grain size is used as the heat insulating material for a molten metal. The soot of the ash obtainable by this method consists essentially of coke material and is hardly combustible because it is produced by a quick heating process. Hence, if this is added to the surface of the molten metal to form a covering layer, the covering layer maintains difficult solubility to retard the consumption of C for a long time and this makes possible to maintenance the molten metal surface in a reducing atmosphere for a long period of time.
JP4721479A 1979-04-19 1979-04-19 Covering and heat insulating material for molten metal Pending JPS55141512A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4721479A JPS55141512A (en) 1979-04-19 1979-04-19 Covering and heat insulating material for molten metal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4721479A JPS55141512A (en) 1979-04-19 1979-04-19 Covering and heat insulating material for molten metal

Publications (1)

Publication Number Publication Date
JPS55141512A true JPS55141512A (en) 1980-11-05

Family

ID=12768899

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4721479A Pending JPS55141512A (en) 1979-04-19 1979-04-19 Covering and heat insulating material for molten metal

Country Status (1)

Country Link
JP (1) JPS55141512A (en)

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