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1. WO1985000357 - ELECTRIC GLASS MELTING FURNACE

Publication Number WO/1985/000357
Publication Date 31.01.1985
International Application No. PCT/US1984/000591
International Filing Date 16.04.1984
IPC
C03B 37/092 2006.01
CCHEMISTRY; METALLURGY
03GLASS; MINERAL OR SLAG WOOL
BMANUFACTURE OR SHAPING OF GLASS, OR OF MINERAL OR SLAG WOOL; SUPPLEMENTARY PROCESSES IN THE MANUFACTURE OR SHAPING OF GLASS, OR OF MINERAL OR SLAG WOOL
37Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
08Bushings; Spinnerettes; Nozzles or nozzle plates
09electrically heated
092Direct-resistance heating
C03B 5/027 2006.01
CCHEMISTRY; METALLURGY
03GLASS; MINERAL OR SLAG WOOL
BMANUFACTURE OR SHAPING OF GLASS, OR OF MINERAL OR SLAG WOOL; SUPPLEMENTARY PROCESSES IN THE MANUFACTURE OR SHAPING OF GLASS, OR OF MINERAL OR SLAG WOOL
5Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
02in electric furnaces
027by passing an electric current between electrodes immersed in the glass bath, i.e. by direct resistance heating
C03B 5/425 2006.01
CCHEMISTRY; METALLURGY
03GLASS; MINERAL OR SLAG WOOL
BMANUFACTURE OR SHAPING OF GLASS, OR OF MINERAL OR SLAG WOOL; SUPPLEMENTARY PROCESSES IN THE MANUFACTURE OR SHAPING OF GLASS, OR OF MINERAL OR SLAG WOOL
5Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
16Special features of the melting process; Auxiliary means specially adapted for glass-melting furnaces
42Details of construction of furnace walls, e.g. to prevent corrosion; Use of materials for furnace walls
425Preventing corrosion or erosion
C03B 5/44 2006.01
CCHEMISTRY; METALLURGY
03GLASS; MINERAL OR SLAG WOOL
BMANUFACTURE OR SHAPING OF GLASS, OR OF MINERAL OR SLAG WOOL; SUPPLEMENTARY PROCESSES IN THE MANUFACTURE OR SHAPING OF GLASS, OR OF MINERAL OR SLAG WOOL
5Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
16Special features of the melting process; Auxiliary means specially adapted for glass-melting furnaces
42Details of construction of furnace walls, e.g. to prevent corrosion; Use of materials for furnace walls
44Cooling arrangements for furnace walls
C03B 7/07 2006.01
CCHEMISTRY; METALLURGY
03GLASS; MINERAL OR SLAG WOOL
BMANUFACTURE OR SHAPING OF GLASS, OR OF MINERAL OR SLAG WOOL; SUPPLEMENTARY PROCESSES IN THE MANUFACTURE OR SHAPING OF GLASS, OR OF MINERAL OR SLAG WOOL
7Distributors for the molten glass; Means for taking-off charges of molten glass; Producing the gob
02Forehearths, i.e. feeder channels
06Means for thermal conditioning or controlling the temperature of the glass
07Electric means
CPC
C03B 37/092
CCHEMISTRY; METALLURGY
03GLASS; MINERAL OR SLAG WOOL
BMANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
37Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
08Bushings ; , e.g. construction, bushing reinforcement means; Spinnerettes; Nozzles; Nozzle plates
09electrically heated
092Direct-resistance heating
C03B 5/027
CCHEMISTRY; METALLURGY
03GLASS; MINERAL OR SLAG WOOL
BMANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
5Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
02in electric furnaces ; , e.g. by dielectric heating
027by passing an electric current between electrodes immersed in the glass bath, i.e. by direct resistance heating
C03B 5/0275
CCHEMISTRY; METALLURGY
03GLASS; MINERAL OR SLAG WOOL
BMANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
5Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
02in electric furnaces ; , e.g. by dielectric heating
027by passing an electric current between electrodes immersed in the glass bath, i.e. by direct resistance heating
0275Shaft furnaces
C03B 5/425
CCHEMISTRY; METALLURGY
03GLASS; MINERAL OR SLAG WOOL
BMANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
5Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
16Special features of the melting process; Auxiliary means specially adapted for glass-melting furnaces
42Details of construction of furnace walls, e.g. to prevent corrosion; Use of materials for furnace walls
425Preventing corrosion or erosion
C03B 5/44
CCHEMISTRY; METALLURGY
03GLASS; MINERAL OR SLAG WOOL
BMANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
5Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
16Special features of the melting process; Auxiliary means specially adapted for glass-melting furnaces
42Details of construction of furnace walls, e.g. to prevent corrosion; Use of materials for furnace walls
44Cooling arrangements for furnace walls
C03B 7/07
CCHEMISTRY; METALLURGY
03GLASS; MINERAL OR SLAG WOOL
BMANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
7Distributors for the molten glass; Means for taking-off charges of molten glass; Producing the gob ; , e.g. controlling the gob shape, weight or delivery tact
02Forehearths, i.e. feeder channels
06Means for thermal conditioning or controlling the temperature of the glass
07Electric means
Applicants
  • OWENS-CORNING FIBERGLAS CORPORATION [US]/[US]
Inventors
  • DUNN, Charles, Scheeler
Agents
  • HUDGENS, Ronald, C. @
Priority Data
512,85411.07.1983US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) ELECTRIC GLASS MELTING FURNACE
(FR) FOUR ELECTRIQUE POUR LA FUSION OU VERRE
Abstract
(EN)
A glass heating method and apparatus, such as a glass melting furnace (10) or a forehearth, utilizing a refractory lining (20, 21 and 23) and electrically energized heating electrodes (30 and 32). The refractory lining (20, 21 and 23) is an erosion resistant material, preferably a chromic oxide refractory, having an electrical resistivity which is less than the resistivity of the molten glass, preferably an E glass, which is being heated. To avoid short-circuiting through the low resistance refractory (20, 21 and 23), the refractory (20, 21 or 23) interposed between electrodes of opposite polarity is cooled to a temperature less than the temperature of the molten glass and at which the resistivity of the refractory (20, 21 or 23) is materially increased. Where the electrodes (30 or 32) of opposite polarity are carried by opposing side walls (11), the end and/or side walls of the apparatus are cooled. Where the electrodes are all carried by a single wall, that wall is cooled.
(FR)
Procédé et dispositif de chauffe pour le verre, tel qu'un four (10) ou avant-creuset pour la fusion du verre, utilisant un revêtement réfractaire (20, 21 et 23) et des électrodes de chauffe alimentées électriquement (30 et 32). Le revêtement réfractaire (20, 22 et 23) est un matériau résistant à l'érosion, de préférence un matériau réfractaire à base d'oxyde chromique, possèdant une résistivité électrique inférieure à la résistivité du verre en fusion, de préférence un verre E. Afin d'éviter la production de courts-circuits au travers du matériau réfractaire de faible résistance (20, 21 et 23), le matériau réfractaire (20, 21 ou 23) intercalé entre les électrodes de polarité opposée est refroidi à une température inférieure à la température du verre en fusion, température à laquelle la résistivité du matériau réfractaire (20, 21 ou 23) est augmentée matériellement. Lorsque les électrodes (30 ou 32) de polarité opposée sont montées sur des parois latérales opposées (11), les parois d'extrémités et/ou latérales du dispositif sont refroidies. Lorsque les électrodes sont toutes montées sur une une seule paroi, on refroidit cette même paroi.
Also published as
FI850470
FI850747
NO19850858
Other related publications
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