GB1473091A - - Google Patents
Info
- Publication number
- GB1473091A GB1473091A GB48673A GB48673A GB1473091A GB 1473091 A GB1473091 A GB 1473091A GB 48673 A GB48673 A GB 48673A GB 48673 A GB48673 A GB 48673A GB 1473091 A GB1473091 A GB 1473091A
- Authority
- GB
- United Kingdom
- Prior art keywords
- chamber
- electrode
- bottom wall
- current
- electrodes
- 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.)
- Expired
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
- C03B5/16—Special features of the melting process; Auxiliary means specially adapted for glass-melting furnaces
- C03B5/167—Means for preventing damage to equipment, e.g. by molten glass, hot gases, batches
- C03B5/1672—Use of materials therefor
-
- 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
-
- 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
- C03B5/16—Special features of the melting process; Auxiliary means specially adapted for glass-melting furnaces
- C03B5/167—Means for preventing damage to equipment, e.g. by molten glass, hot gases, batches
-
- 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
- C03B5/16—Special features of the melting process; Auxiliary means specially adapted for glass-melting furnaces
- C03B5/26—Outlets, e.g. drains, siphons; Overflows, e.g. for supplying the float tank, tweels
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/02—Details
- H05B3/03—Electrodes
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/60—Heating arrangements wherein the heating current flows through granular powdered or fluid material, e.g. for salt-bath furnace, electrolytic heating
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Secondary Cells (AREA)
Abstract
1473091 Internal resistance heating ELEMELT Ltd 14 March 1974 [4 Jan 1973] 486/73 Heading H5H A furnace for melting materials which are only conducting when molten, e.g. glass, alumina, sodium silicate or magnesium chloride comprises a furnace chamber having a bottom wall 12 and a peripheral wall 17, an inner electrode arrangement at or near the centre of the chamber and an outer electrode arrangement at or near the peripheral wall 17, an A.C. supply connected to the inner and outer electrode arrangements in such a way that current flows radially between the inner and outer electrode arrangements and the establishment of peripheral voltage gradients in the peripheral wall 17 is avoided, and means for diverting current from the bottom wall of the chamber. Such an arrangement permits the peripheral wall 17 to be formed of or lined with a material, e.g. 96% chromic ocide, 4% titanium oxide, which although chemically non-reactive, has too high an electrical conductivity to be used normally. As shown the outer electrode arrangement comprises angularly spaced electrodes 19a-19i and the inner electrode arrangement comprises a concentric array of electrodes 20a-20i. To divert current from the bottom wall 12 insulating blocks 21 which shroud the lower ends of the electrodes are provided. The blocks 21 are made of zirconium orthosilicate. The blocks cause the formation of a stagnant layer of glass in contact with the bottom wall and thus allow it to be formed of or lined with chromic oxide material. Alternatively, the diversion of current to the bottom wall may be prevented by a relatively poorly conducting lining on the bottom wall. Either or both electrode arrangements may be in the form of cylindrical electrodes, the outer cylindrical electrode forming the wall of the chamber and being composed of the chromic oxide material and the inner cylindrical electrode, also being formed of chromic oxide and forming the inner wall of an annular chamber. An intermediate concentric array of electrodes may be interposed between the inner and outer electrode arrays to enable the outer portion of the chamber, which is subjected to the greater heat loss, to be heated more than the inner portion of the chamber. An outlet for glass may be provided in the centre of the bottom wall or may extend radially between the electrode arrays. When a central outlet is provided it may be formed as a duct having an adjustable crosssection for forming fibres. The duct may be heated by current between an annular electrode about the duct exit and the inner electrode array. Current regulators may control the current between the inner and outer electrode arrays. Reference has been directed by the Comptroller to Specification 1,177,070.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB48673A GB1473091A (en) | 1974-03-14 | 1974-03-14 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB48673A GB1473091A (en) | 1974-03-14 | 1974-03-14 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1473091A true GB1473091A (en) | 1977-05-11 |
Family
ID=9705189
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB48673A Expired GB1473091A (en) | 1974-03-14 | 1974-03-14 |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1473091A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0014145A1 (en) * | 1979-01-22 | 1980-08-06 | Union Carbide Corporation | Method of fusing vanadium pentoxide powder, and furnace therefor |
US4492587A (en) * | 1979-01-22 | 1985-01-08 | Union Carbide Corporation | Method of fusing vanadium pentoxide powder |
US4737966A (en) * | 1987-01-12 | 1988-04-12 | Corning Glass Works | Electric melter for high electrical resistivity glass materials |
CN102193516A (en) * | 2011-03-30 | 2011-09-21 | 四川瑞能硅材料有限公司 | Control circuit and method for automatically increasing electric current of reducing furnace |
WO2013175135A1 (en) * | 2012-05-25 | 2013-11-28 | Saint-Gobain Isover | Device for pouring molten glass |
-
1974
- 1974-03-14 GB GB48673A patent/GB1473091A/en not_active Expired
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0014145A1 (en) * | 1979-01-22 | 1980-08-06 | Union Carbide Corporation | Method of fusing vanadium pentoxide powder, and furnace therefor |
US4492587A (en) * | 1979-01-22 | 1985-01-08 | Union Carbide Corporation | Method of fusing vanadium pentoxide powder |
US4737966A (en) * | 1987-01-12 | 1988-04-12 | Corning Glass Works | Electric melter for high electrical resistivity glass materials |
CN102193516A (en) * | 2011-03-30 | 2011-09-21 | 四川瑞能硅材料有限公司 | Control circuit and method for automatically increasing electric current of reducing furnace |
WO2013175135A1 (en) * | 2012-05-25 | 2013-11-28 | Saint-Gobain Isover | Device for pouring molten glass |
FR2990937A1 (en) * | 2012-05-25 | 2013-11-29 | Saint Gobain Isover | MOLTEN GLASS CASTING DEVICE |
CN104302585A (en) * | 2012-05-25 | 2015-01-21 | 圣戈班伊索福公司 | Device for pouring molten glass |
AU2013265035B2 (en) * | 2012-05-25 | 2017-01-12 | Saint-Gobain Isover | Device for pouring molten glass |
US9676645B2 (en) | 2012-05-25 | 2017-06-13 | Saint-Gobain Isover | Device for flowing molten glass |
CN104302585B (en) * | 2012-05-25 | 2017-09-29 | 圣戈班伊索福公司 | For the device for flowing through melten glass |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US3520979A (en) | Electrode circuit for hex electric furnace | |
US4655812A (en) | Electric heating of glass forehearth | |
US3429972A (en) | Very high temperature electric melting furnace | |
US2599179A (en) | Furnace electrode | |
GB1473091A (en) | ||
US3147328A (en) | Electric glassmaking furnace | |
ES8502956A1 (en) | Melting furnaces. | |
JPS6124334B2 (en) | ||
US3628948A (en) | Electric arc vacuum melting processes | |
JPH06227822A (en) | Outflow apparatus for glass preform | |
US4514851A (en) | Arc circuit electrodes for arc glass-melting furnace | |
US3155759A (en) | High temperature furnace | |
US3398229A (en) | Nonconsumable arc electrode | |
US1062362A (en) | Electric furnace for the continuous manufacture of glass. | |
US4119876A (en) | Electrode structure for an electric discharge device | |
US2283800A (en) | Electrode arrangement for glass furnaces or the like | |
US3575633A (en) | Arc heater having a spirally rotating arc | |
US4213002A (en) | Electrically heated melting furnace for mineral materials | |
US1091808A (en) | Electric crucible-furnace. | |
JPS61150758A (en) | Method for heating molten metal in tundish for continuous casting | |
US3531275A (en) | Use of silicide electrode in glass melting | |
US3230291A (en) | Electric furnace | |
US4169963A (en) | Electrically heated melting furnace for mineral materials | |
US4337373A (en) | Furnace for fusing vanadium pentoxide powder | |
SU858294A1 (en) | Furnace for drawing fibre of high-melting glass |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |