JPS5771825A - Start-up of vitrification melting furnace - Google Patents

Start-up of vitrification melting furnace

Info

Publication number
JPS5771825A
JPS5771825A JP55149043A JP14904380A JPS5771825A JP S5771825 A JPS5771825 A JP S5771825A JP 55149043 A JP55149043 A JP 55149043A JP 14904380 A JP14904380 A JP 14904380A JP S5771825 A JPS5771825 A JP S5771825A
Authority
JP
Japan
Prior art keywords
molten
melting
salt mixture
mixture
salt
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
JP55149043A
Other languages
Japanese (ja)
Other versions
JPS5946893B2 (en
Inventor
Naohiko Ogino
Noboru Endo
Yutaka Nagaki
Naoki Tsunoda
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.)
Doryokuro Kakunenryo Kaihatsu Jigyodan
Power Reactor and Nuclear Fuel Development Corp
Original Assignee
Doryokuro Kakunenryo Kaihatsu Jigyodan
Power Reactor and Nuclear Fuel Development 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 Doryokuro Kakunenryo Kaihatsu Jigyodan, Power Reactor and Nuclear Fuel Development Corp filed Critical Doryokuro Kakunenryo Kaihatsu Jigyodan
Priority to JP55149043A priority Critical patent/JPS5946893B2/en
Publication of JPS5771825A publication Critical patent/JPS5771825A/en
Publication of JPS5946893B2 publication Critical patent/JPS5946893B2/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B5/00—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
    • C03B5/005—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture of glass-forming waste materials
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B5/00—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
    • C03B5/02—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture in electric furnaces, e.g. by dielectric heating
    • C03B5/027—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture in electric furnaces, e.g. by dielectric heating by passing an electric current between electrodes immersed in the glass bath, i.e. by direct resistance heating
    • C03B5/0275—Shaft furnaces
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B5/00—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
    • C03B5/02—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture in electric furnaces, e.g. by dielectric heating
    • C03B5/033—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture in electric furnaces, e.g. by dielectric heating by using resistance heaters above or in the glass bath, i.e. by indirect resistance heating
    • C03B5/0336—Shaft furnaces
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P40/00—Technologies relating to the processing of minerals
    • Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Resistance Heating (AREA)
  • Glass Melting And Manufacturing (AREA)
  • Furnace Details (AREA)

Abstract

PURPOSE: To shorten the start-up time of a melting furnace for the vitrification of radioactive wastes, remarkably, by externally heating and melting a mixture of sodium nitrate and sodium borate placed in contact with the material to be molten until the mixture becomes electrically-conductive, and then passing an electrical current through the molten salt mixture and melting the material by the Joule heat.
CONSTITUTION: A salt mixture 10 is placed directly on the material 8 to be molten, and heated with the external heater 2. The salt mixture contains at least 5W50% sodium nitrate and 25W50% sodium borate. When a part of the salt mixture is molten and becomes electrically-conductive, electrical curent flows between the auxiliary electrodes 7 to soften the rest part of the salt mixture. When the temperature of the molten salt reaches about 600°C, stationary current flows between the auxiliary electrodes 7, and the material 8 to be molten begins to melt. As the melting of the material 8 proceeds, an electrical current begins to flow between the main electrodes 3 to heat and start up the furnace 1.
COPYRIGHT: (C)1982,JPO&Japio
JP55149043A 1980-10-24 1980-10-24 How to start up a vitrification melting furnace Expired JPS5946893B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55149043A JPS5946893B2 (en) 1980-10-24 1980-10-24 How to start up a vitrification melting furnace

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55149043A JPS5946893B2 (en) 1980-10-24 1980-10-24 How to start up a vitrification melting furnace

Publications (2)

Publication Number Publication Date
JPS5771825A true JPS5771825A (en) 1982-05-04
JPS5946893B2 JPS5946893B2 (en) 1984-11-15

Family

ID=15466394

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55149043A Expired JPS5946893B2 (en) 1980-10-24 1980-10-24 How to start up a vitrification melting furnace

Country Status (1)

Country Link
JP (1) JPS5946893B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6258887U (en) * 1985-10-01 1987-04-11
US4710266A (en) * 1983-08-09 1987-12-01 Ebara Corporation Apparatus for subjecting a radioactive sodium borate waste solution to volume reduction and solidification
FR2620560A1 (en) * 1987-09-16 1989-03-17 Doryokuro Kakunenryo THERMAL DECOMPOSITION TREATMENT APPARATUS FOR RADIOACTIVE WASTE

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4710266A (en) * 1983-08-09 1987-12-01 Ebara Corporation Apparatus for subjecting a radioactive sodium borate waste solution to volume reduction and solidification
US4725383A (en) * 1983-08-09 1988-02-16 Ebara Corporation Process for volume reduction and solidification of a radioactive sodium borate waste solution
JPS6258887U (en) * 1985-10-01 1987-04-11
JPH041677Y2 (en) * 1985-10-01 1992-01-21
FR2620560A1 (en) * 1987-09-16 1989-03-17 Doryokuro Kakunenryo THERMAL DECOMPOSITION TREATMENT APPARATUS FOR RADIOACTIVE WASTE

Also Published As

Publication number Publication date
JPS5946893B2 (en) 1984-11-15

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