GB1369144A - Electric furnace - Google Patents
Electric furnaceInfo
- Publication number
- GB1369144A GB1369144A GB2324372A GB2324372A GB1369144A GB 1369144 A GB1369144 A GB 1369144A GB 2324372 A GB2324372 A GB 2324372A GB 2324372 A GB2324372 A GB 2324372A GB 1369144 A GB1369144 A GB 1369144A
- Authority
- GB
- United Kingdom
- Prior art keywords
- furnace
- electrodes
- side walls
- phase
- glass
- 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
- C03B5/02—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
-
- 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
- H05B3/0019—Circuit arrangements
- H05B3/0023—Circuit arrangements for heating by passing the current directly across the material to be heated
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Glass Melting And Manufacturing (AREA)
Abstract
1369144 Internal resistance heating OWENSCORNING FIBERGLAS CORP 17 May 1972 [17 May 1971] 23243/72 Heading H5H In order to protect low electrical resistance refractory walls of a glass furnace Fig. 4, a plurality of grounded interconnected electrodes 47, 47<SP>1</SP> are arranged between the side walls of the furnace and the "hot" electrode formed by two interconnected electrodes 46. In the single-phase furnace of Fig. 4, one electrode 47 is arranged to be adjacent the entrance of the throat 48 to insure that convection currents are created to prevent batch material (unmelted glass), floating on top of the melt, from being drawn out of the furnace. The furnace side walls may be chromic oxide and the floor of dense fused silica. Water jackets 34, Fig. 3 (not shown), may be provided around the electrodes to cool the furnace floor. The cool batch material distributed over the melt surface, prevents the escape of fluorine, (added as a flux) and boron from the molten glass. In multiphase arrangements, e.g. three phase furnaces, Fig. 5, electrode pairs 56, 57, 58 are connected to a phase of the supply and secondary grounded electrodes 59<SP>1</SP>, 59 lie between the individual electrode pairs and between said pairs and the side walls of the furnace.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US14414371A | 1971-05-17 | 1971-05-17 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1369144A true GB1369144A (en) | 1974-10-02 |
Family
ID=22507266
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2324372A Expired GB1369144A (en) | 1971-05-17 | 1972-05-17 | Electric furnace |
Country Status (8)
Country | Link |
---|---|
JP (1) | JPS5535336B1 (en) |
BE (1) | BE783519A (en) |
CA (1) | CA940574A (en) |
DE (1) | DE2223183A1 (en) |
FR (1) | FR2137947A1 (en) |
GB (1) | GB1369144A (en) |
IT (1) | IT955566B (en) |
NL (1) | NL7206387A (en) |
-
1972
- 1972-05-12 DE DE19722223183 patent/DE2223183A1/en active Pending
- 1972-05-12 NL NL7206387A patent/NL7206387A/xx not_active Application Discontinuation
- 1972-05-15 CA CA142,164A patent/CA940574A/en not_active Expired
- 1972-05-16 FR FR7217445A patent/FR2137947A1/fr not_active Withdrawn
- 1972-05-16 BE BE783519A patent/BE783519A/en unknown
- 1972-05-16 IT IT2441772A patent/IT955566B/en active
- 1972-05-17 GB GB2324372A patent/GB1369144A/en not_active Expired
- 1972-05-17 JP JP4901072A patent/JPS5535336B1/ja active Pending
Also Published As
Publication number | Publication date |
---|---|
BE783519A (en) | 1972-11-16 |
JPS5535336B1 (en) | 1980-09-12 |
IT955566B (en) | 1973-09-29 |
DE2223183A1 (en) | 1972-11-30 |
NL7206387A (en) | 1972-11-21 |
FR2137947A1 (en) | 1972-12-29 |
CA940574A (en) | 1974-01-22 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |