GB925899A - Improvements in or relating to electric resistance furnaces - Google Patents
Improvements in or relating to electric resistance furnacesInfo
- Publication number
- GB925899A GB925899A GB31918/59A GB3191859A GB925899A GB 925899 A GB925899 A GB 925899A GB 31918/59 A GB31918/59 A GB 31918/59A GB 3191859 A GB3191859 A GB 3191859A GB 925899 A GB925899 A GB 925899A
- Authority
- GB
- United Kingdom
- Prior art keywords
- furnace
- elements
- furnaces
- heating
- pits
- 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
- 238000010438 heat treatment Methods 0.000 abstract 5
- 229910004298 SiO 2 Inorganic materials 0.000 abstract 2
- 239000000919 ceramic Substances 0.000 abstract 2
- 238000002791 soaking Methods 0.000 abstract 2
- 229910016006 MoSi Inorganic materials 0.000 abstract 1
- 229910000831 Steel Inorganic materials 0.000 abstract 1
- 230000001464 adherent effect Effects 0.000 abstract 1
- 229910000278 bentonite Inorganic materials 0.000 abstract 1
- 239000000440 bentonite Substances 0.000 abstract 1
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 abstract 1
- 239000011230 binding agent Substances 0.000 abstract 1
- 229910052804 chromium Inorganic materials 0.000 abstract 1
- 239000004927 clay Substances 0.000 abstract 1
- 238000001816 cooling Methods 0.000 abstract 1
- 239000011521 glass Substances 0.000 abstract 1
- 229910052735 hafnium Inorganic materials 0.000 abstract 1
- 239000012535 impurity Substances 0.000 abstract 1
- 229910052751 metal Inorganic materials 0.000 abstract 1
- 239000002184 metal Substances 0.000 abstract 1
- 150000001247 metal acetylides Chemical class 0.000 abstract 1
- 150000002739 metals Chemical class 0.000 abstract 1
- 229910052758 niobium Inorganic materials 0.000 abstract 1
- 238000004663 powder metallurgy Methods 0.000 abstract 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 abstract 1
- 229910010271 silicon carbide Inorganic materials 0.000 abstract 1
- 239000010959 steel Substances 0.000 abstract 1
- 239000000126 substance Substances 0.000 abstract 1
- 229910052715 tantalum Inorganic materials 0.000 abstract 1
- 229910052719 titanium Inorganic materials 0.000 abstract 1
- 229910052721 tungsten Inorganic materials 0.000 abstract 1
- 229910052720 vanadium Inorganic materials 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 1
- 229910052726 zirconium Inorganic materials 0.000 abstract 1
Classifications
-
- 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
- H05B3/62—Heating elements specially adapted for furnaces
Landscapes
- Furnace Details (AREA)
- Resistance Heating (AREA)
- Tunnel Furnaces (AREA)
Abstract
925,899. Electric furnace resistance elements. KANTHAL A.B. Sept. 18, 1959 [Sept. 22, 1958; Dec. 3, 1958; Feb. 6, 1959], No. 31918/59. Class 39 (3). An electric resistance furnace is heated by vertically disposed, hairpin-shaped resistor elements containing Si so that a superficial layer of SiO 2 is formed in operation, the temperature of operation being such that the superficial layer flows slowly downwards and leaves the heating elements as drops so that adherent impurities are removed. The heater elements are of MoSi 2 , made by powder metallurgy and having a ceramic binding agent of fusible clay e.g. bentonite with residues of carbides, oxides, borides and other metals converted to oxides in operation which flow together with the SiO 2 , or of silicon carbide. The Mo may be replaced by one or more of Ti, Zr, Hf, V, Nb, Ta, Cr or W and the processing is of steel ingots or of glass, ceramics or chemicals. The invention can be applied to soaking pit furnaces continuous heating furnaces, open hearth furnaces, rotary hearth furnaces and high-temperature furnaces. In one form (soaking pit furnace), Fig. 1, there are two juxtaposed rows of heating pits each row containing e.g. 10 pits. The covers 21 can be lifted and moved aside by a traverse. The heaters 26 instead of hairpins may have tubular lead in and glow portions and a rod or tubular return insulated from each other by an intermediate oxide layer. Vertical webs are placed between the glow zones of the elements. The heating elements are connected in groups each comprising four juxtaposed heating pits each group being controlled separately. Steps 29 have slag-receiving pockets and are associated with slag-removing openings in the furnace walls. In Figs. 4-6 (not shown) the heater elements are bent at 120 degrees, bent perpendicularly or arched or may depend vertically for their entire length, Fig. 7 (not shown). The rotary hearth of a rotary hearth furnace may be moved continuously or stepwise, Fig. 16 (not shown). In a high-temperature furnace, Fig. 19, rollers 94, 96 are grooved so can carry one, three, or any number of elongated rod shaped or tubular bodies the shafts 95, 97 of which are driven together or separately; they may have a central channel for water cooling. Ribs 101 protect the heaters 99 from damage. Specification 925,898 is referred to.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE887458 | 1958-09-22 | ||
| SE1120058 | 1958-12-03 | ||
| SE115159 | 1959-02-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB925899A true GB925899A (en) | 1963-05-15 |
Family
ID=27354264
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB31918/59A Expired GB925899A (en) | 1958-09-22 | 1959-09-18 | Improvements in or relating to electric resistance furnaces |
| GB36783/59A Expired GB868442A (en) | 1958-09-22 | 1959-10-29 | Improvements in or relating to electric crucible furnaces |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB36783/59A Expired GB868442A (en) | 1958-09-22 | 1959-10-29 | Improvements in or relating to electric crucible furnaces |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US3092681A (en) |
| DE (1) | DE1127009B (en) |
| GB (2) | GB925899A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102954691A (en) * | 2012-10-29 | 2013-03-06 | 苏州新长光热能科技有限公司 | Pit-type aluminum ingot heating furnace |
| CN106288690A (en) * | 2016-09-23 | 2017-01-04 | 丹阳市恒泰电炉有限公司 | Combustion gas drying oven |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1515152B1 (en) * | 1964-06-18 | 1970-07-23 | Sigri Elektrographit Gmbh | High temperature furnace equipped with at least one molybdenum silicide heating element |
| US4462963A (en) * | 1982-03-05 | 1984-07-31 | Leco Corporation | Analytical furnace |
| DE3620203A1 (en) * | 1986-06-16 | 1987-12-17 | Riedhammer Ludwig Gmbh | HEATING ELEMENT |
Family Cites Families (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2650254A (en) * | 1953-08-25 | Side heater | ||
| US1498990A (en) * | 1921-07-05 | 1924-06-24 | Beyer Robert | Electric furnace |
| US1547623A (en) * | 1922-08-11 | 1925-07-28 | Electric Heating Apparatus Com | Electric furnace |
| US1532017A (en) * | 1923-04-18 | 1925-03-31 | Gen Electric | Enameling apparatus |
| US1776823A (en) * | 1923-05-31 | 1930-09-30 | David L Summey | Heating apparatus |
| US1901499A (en) * | 1924-05-19 | 1933-03-14 | Frank A Fahrenwald | Electric furnace |
| US1659946A (en) * | 1926-03-12 | 1928-02-21 | Western Electric Co | Apparatus for heat treating articles |
| US1853382A (en) * | 1930-02-18 | 1932-04-12 | Hevi Duty Electric Co | Supporting means for electrical heating elements |
| US2618671A (en) * | 1948-12-28 | 1952-11-18 | Norton Co | Tunnel kiln |
| US2622304A (en) * | 1950-10-02 | 1952-12-23 | Climax Molybdenum Co | Refractory |
| US2745928A (en) * | 1952-10-06 | 1956-05-15 | American Electro Metal Corp | Heater bodies and their production |
| US2745932A (en) * | 1953-06-03 | 1956-05-15 | American Electro Metal Corp | Electric resistor |
| DE1010668B (en) * | 1955-08-31 | 1957-06-19 | Siemens Planiawerke A G Fuer K | Heating element for electric resistance furnaces with operating temperatures over 1500íÒC |
| DE1027820B (en) * | 1957-01-25 | 1958-04-10 | Siemens Planiawerke Ag | Heating element with loop-shaped glow part for electrical resistance ovens |
| DE1060066B (en) * | 1958-02-18 | 1959-06-25 | Siemens Planiawerke Ag | Heating element for electrical resistance furnaces for temperatures above 1600 ° C |
-
1959
- 1959-09-14 DE DEA32857A patent/DE1127009B/en active Pending
- 1959-09-18 GB GB31918/59A patent/GB925899A/en not_active Expired
- 1959-09-18 US US840932A patent/US3092681A/en not_active Expired - Lifetime
- 1959-10-29 GB GB36783/59A patent/GB868442A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102954691A (en) * | 2012-10-29 | 2013-03-06 | 苏州新长光热能科技有限公司 | Pit-type aluminum ingot heating furnace |
| CN106288690A (en) * | 2016-09-23 | 2017-01-04 | 丹阳市恒泰电炉有限公司 | Combustion gas drying oven |
Also Published As
| Publication number | Publication date |
|---|---|
| GB868442A (en) | 1961-05-17 |
| US3092681A (en) | 1963-06-04 |
| DE1127009B (en) | 1962-04-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB925899A (en) | Improvements in or relating to electric resistance furnaces | |
| US2527144A (en) | Smelter and method of smelting frit | |
| US2100222A (en) | Enameling furnace | |
| US2543388A (en) | Method of furnace operation | |
| US3169015A (en) | Process and apparatus for the recovery of heat from furnaces for working glass and similar products | |
| EP3769583B1 (en) | A heating element comprising chromium alloyed molybdenum disilicide and the use thereof | |
| US2638333A (en) | Continuous furnace | |
| US2293813A (en) | Furnace construction | |
| CN100513590C (en) | Induction heating method of reducing bar material for suspension spring use | |
| CN208012386U (en) | A kind of resistance furnace | |
| US4334858A (en) | Prevention of thermal spalling in ceramic products | |
| US1997622A (en) | Electric furnace and method of operating the same | |
| DE966459C (en) | Process for the oxidizing and reducing treatment of oxidic ores in shaft furnaces | |
| US1350877A (en) | Method of oxidizing materials in electric furnaces | |
| US2981820A (en) | Electrically heated furnace | |
| US2375771A (en) | Furnace | |
| US1870262A (en) | Muffle furnace leer | |
| JPS639571Y2 (en) | ||
| DE423667C (en) | Gas-fired fan oven | |
| SU121494A1 (en) | Multichannel Tunnel Electric Furnace | |
| JPS6324239B2 (en) | ||
| US1543714A (en) | Heat-treating furnace | |
| Slednev et al. | Service of corundum blocks in the hearth of heat-treatment furnaces | |
| US1594837A (en) | Furnace | |
| SU50797A1 (en) | Heating resistance for electric ovens |