CA1205628A - Furnace for preheating elongated material - Google Patents
Furnace for preheating elongated materialInfo
- Publication number
- CA1205628A CA1205628A CA000433271A CA433271A CA1205628A CA 1205628 A CA1205628 A CA 1205628A CA 000433271 A CA000433271 A CA 000433271A CA 433271 A CA433271 A CA 433271A CA 1205628 A CA1205628 A CA 1205628A
- Authority
- CA
- Canada
- Prior art keywords
- furnace
- preheating
- shells
- exhaust gas
- insulation
- 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
Landscapes
- Furnace Details (AREA)
Abstract
Abstract of the Disclosure A preheating furnace for elongated material, particularly bars, billets, and the like of light metal has a furnace tunnel (15) formed by furnace shells (14) for preheating the material (1). At least in their central range the fur-nace shells are covered by a heat insulation which com-prises removably designed insulation members (54,56). The insulation members (54,56) are drawn upwardly above the furnace shells (14) forming an exhaust gas duct (32) in which the furnace tunnel is integrated. Thus a heat insula-tion for the preheating furnace is provided which is easy to assemble and disassemble and considerably improves the utilization of the heat energy.
Description
A preheating furnace for elongated material The invention relates to a preheating furnace for elongated material, like bars, ingots, billets, and the like of metal, particularly aluminum or aluminum alloys, comprising a funace tunnel made of continuous or segmentally joined re-5 fractory furnace shells, particularly thin-walled furnace shells, and adapted to be heated by heater elements, like burners, hot gas nozzles, and ~he like which extend through the shell walls and are directed toward the material intro--duced in longitudinal orientation in the furnace tunnel for 10 direct hearing of the same, and further comprising an ex-haust gas duct disposed in the uppper furnace range.
In a known furnace of this kind (DE-PS 18 07 504) the thin-walled furnace shells are inserted in the furnace structure without heat insulation. This causes heat losses especially 15 by radiation from the outside walls of the furnace shells.
The exhaust gas is sucked off into the exhaust gas duct through a slot in the top of the furnace tunnel. In the path of the gas between the furnace tunnel and the exhaust gas duct heat gets lost. For this reason the efficiency of 20 the known furnace is low. Besides, the known structure is complicated and high because the exhaùst gas duct is arrang-ed separately above the furnace tunnel.
It is the object of~the invention to design a preheating furnace of the kind specified initially such that the ener-25 gy supplied for heating is utilized more effec~ively witha simple and compact structure.
To meet this object it is provided, in accordance with the invention, in a preheating furnace of the kind specified initially that the furnace tunnel is integrated in the ex-30 haust duct which somprises a heat insulation. Preferablythe heat insulation of the exhaust gas duct covers the .~
~Z~S62~
furnace shells of the furnace tunnel from outside at least in their central range so that the lower areas of the fur-nace shells remain free for purposes of assembly and main-tenance n 5 The fact that the invention provides for much better utili-zation of the energy is due to the circumstance that the exhaust gas is transferred from the furnace tunnel into the exhaust gas duct without any heat losses, for instance through the upper gap bet~een the vertically disposed fur-10 nace shell halves. By virtue of the design in accordancewith the invention the central and upper portions of the furnace tunnel are sufficiently well thermally insulated by the exhaust gas duct itself J i.e. without any additional measures. Heat insulation of the lower areas of the furnace lS tunnel has been dispensed with on purpose to provide better accessibility for assembly work and maintenance. The inven-tor found out that the losses by heat radiation in the lower areas of the furnace shells are relatively small.
Leaving out a heat insulation in these lower areas is high-20 ly advantageous because there remains space for the recep-tion and accessibility of aggregates, like burners, support-~ ing frame for the furnace shells, and the conveyor meansfor the material to be preheated.
The insulation members may extend vertically upwardly from 25 the support members or they may adapt to the upper areas of the furnace shells.
A further development of the invention which is particular-ly advantageous as regards simple assembly and disassembly, is characteri~ed in that heat insulation is supported by 30 support members mounted stationarily on a support frame of the furnace and comprises removable insulation members dis posed above the same, the lower members thereof affording lateral support and insulation of the furnace shells.
-` gLZ~56~3 According to a preferred embodiment of the invention with which lower and upper burner rows are provided, distributed around the circumference of the furnace tunnel, it is pro-vided that the burners of the upper burner rows extend 5 through removable insulation members, while the burners of the lower burner rows are located in the lower range of the furnace shells which is not heat insulated, and that each insulation member through which burners pass has the same length as corresponding segments of the furnace shells.
10 If lower burner rows alone are required, another ~urther development of the -invention provides for all burner rows to open into the furnace tunnel below the heat insulation, and the exhaust gas duct to be a removable assembly unit.
This design is especially favorable as regards simple assem-15 bly, maintenance, or exchange of the furnace shells sincethe exhaust gas duct may be removea as a whole so that the or individual furnace shells may be replaced easily.
With more modern preheating furnaces of the type described the hot exhaust gas is passed from the exhaust gas duct in-20 to a preheating zone of the preheating furnace or anotherfurnace for preheating the material (DE-OS 26 37 646) where-by especially economic fuel exploitation is guaranteed. In this context a furnace group is advantageous with which the exhaust gases of the preheating furnace serve to heat an 25 upstream preheating f~rnace which passes the exhaust gas through at least one fan to at least one row of slot type nozzles arranged along the material and directing the ex-haust gas at the material.
The design according to the invention is particularly ad-30 vantageous where the furnace space of the preheating fur-nace is divided into several heating and control zones which communicate through a common exhaust gas duct. If in-dividual zones are turned off as the rated temperature is reached, they are not influenced by the other zones in gLZ~SG2~
spite of the connection through the exhaust gas duct. The flue gases simply flow out in longitudinal direction in the upper part of the common exhaust qas duct, with preference into a preheating ~one or for preheating the material in 5 an upstream preheating furnace for optimum exploitation of the heat capacity of the fuel in this manner in a furnace group consisting of the preheating furnace and further heat-ing furnaces connected in series downstream thereof.
The invention will be described further, by way of e~ample, -10 with reference to cross sections of two preheating furnaces actually constructed.
In the drawings:
Fig. 1 is a cross section along line l-I of fig. 3 through a first embodiment of a preheating furnace according to the invention;
Fig. 2 is a cross section at the same location through a second embodiment;
Fig. 3 is a lateral elevation, partly in section, of a fur-nace group consisting of a preheating furnace and an upstream heating furnace in accordance with a mo-dification of the invention; and Fig. 4 is a section along line IV-IV of fig. 3 through a heating furnace of the furnace grol~p connected up-stream of a preheating furnace according to fig. 1 or 2.
The preheating furnaces shown comprise a steel structure support frame 10.
In the lower furnace space there is a double strand con-veyor chain 13 to which carrier devices 12 are attached 30 for the material to be preheated, like bars or billets and which advances the material intermittently through the cy-lindrical furnace tunnel 15 formed by semicylindrical fur-nace shell halves 14. In their lower range the furnace ~z~s~
shells 14 are supported pivotably on carrier rails 16 and held in position from above by spacers 17.
With the embodiment shown in fig. 1 only one burner row in-cluding premixture burners 18 disposed in longitudinal rows 5 vertically of the plane of the drawing is provided per row of furnace shells 14. The burners 18 have burner nozzles 20 which project through openings 21 in the furnace shells in-to the cylindrical furnace tunnel 15 acting directly on the material. The burners 18 are so arranged that when preheat-10 ing material 1 of different diameters, ~he surface is utilized well for heat transfer and the temperature is dis-tributed in rotational symmetry across the cross section of the material. The burner nozzl~s 20 are adjusted to per-form such that the desired temperature distribution is ob-15 tained.
Instead of burners 18 hot gas nozzles may be provided for heating, acting on the material 1 for instance by hot air which can be heated electrically in known manner The exhaust gases leave the furnace space 15 in upwàrd di-20 rection through a longitudinal slot 30 defined by the fur nace shell halves 14 at the spacers 17 and then reach an exhaust gas duct 32 directly through a vertical channel ~. x From the exhaust gas duct the exhaust gas is delivered into a preheating zone, not shown, for the material 1 and located 25 upstream of the preheating furnace, for example by being sucked by means of fans, not shown. The exhaust gas duct includes a heat insulation, the lower insulation members 54 of which extend throughout the furnace length, leaving a gap for the furnace tunnel 15, and abutting from outside 30 against the central areas of the furnace shells 14. The lower insulat~nmembers 54 are supported by carrier beams 52 which are mounted stationarily on the support frame 10.
The principal or top portion of the exhaust gas duct 32 is defined by two ver~ical insulation members 5~ and an upper 35 insulation member 58 integral with them.
~Y
In a known furnace of this kind (DE-PS 18 07 504) the thin-walled furnace shells are inserted in the furnace structure without heat insulation. This causes heat losses especially 15 by radiation from the outside walls of the furnace shells.
The exhaust gas is sucked off into the exhaust gas duct through a slot in the top of the furnace tunnel. In the path of the gas between the furnace tunnel and the exhaust gas duct heat gets lost. For this reason the efficiency of 20 the known furnace is low. Besides, the known structure is complicated and high because the exhaùst gas duct is arrang-ed separately above the furnace tunnel.
It is the object of~the invention to design a preheating furnace of the kind specified initially such that the ener-25 gy supplied for heating is utilized more effec~ively witha simple and compact structure.
To meet this object it is provided, in accordance with the invention, in a preheating furnace of the kind specified initially that the furnace tunnel is integrated in the ex-30 haust duct which somprises a heat insulation. Preferablythe heat insulation of the exhaust gas duct covers the .~
~Z~S62~
furnace shells of the furnace tunnel from outside at least in their central range so that the lower areas of the fur-nace shells remain free for purposes of assembly and main-tenance n 5 The fact that the invention provides for much better utili-zation of the energy is due to the circumstance that the exhaust gas is transferred from the furnace tunnel into the exhaust gas duct without any heat losses, for instance through the upper gap bet~een the vertically disposed fur-10 nace shell halves. By virtue of the design in accordancewith the invention the central and upper portions of the furnace tunnel are sufficiently well thermally insulated by the exhaust gas duct itself J i.e. without any additional measures. Heat insulation of the lower areas of the furnace lS tunnel has been dispensed with on purpose to provide better accessibility for assembly work and maintenance. The inven-tor found out that the losses by heat radiation in the lower areas of the furnace shells are relatively small.
Leaving out a heat insulation in these lower areas is high-20 ly advantageous because there remains space for the recep-tion and accessibility of aggregates, like burners, support-~ ing frame for the furnace shells, and the conveyor meansfor the material to be preheated.
The insulation members may extend vertically upwardly from 25 the support members or they may adapt to the upper areas of the furnace shells.
A further development of the invention which is particular-ly advantageous as regards simple assembly and disassembly, is characteri~ed in that heat insulation is supported by 30 support members mounted stationarily on a support frame of the furnace and comprises removable insulation members dis posed above the same, the lower members thereof affording lateral support and insulation of the furnace shells.
-` gLZ~56~3 According to a preferred embodiment of the invention with which lower and upper burner rows are provided, distributed around the circumference of the furnace tunnel, it is pro-vided that the burners of the upper burner rows extend 5 through removable insulation members, while the burners of the lower burner rows are located in the lower range of the furnace shells which is not heat insulated, and that each insulation member through which burners pass has the same length as corresponding segments of the furnace shells.
10 If lower burner rows alone are required, another ~urther development of the -invention provides for all burner rows to open into the furnace tunnel below the heat insulation, and the exhaust gas duct to be a removable assembly unit.
This design is especially favorable as regards simple assem-15 bly, maintenance, or exchange of the furnace shells sincethe exhaust gas duct may be removea as a whole so that the or individual furnace shells may be replaced easily.
With more modern preheating furnaces of the type described the hot exhaust gas is passed from the exhaust gas duct in-20 to a preheating zone of the preheating furnace or anotherfurnace for preheating the material (DE-OS 26 37 646) where-by especially economic fuel exploitation is guaranteed. In this context a furnace group is advantageous with which the exhaust gases of the preheating furnace serve to heat an 25 upstream preheating f~rnace which passes the exhaust gas through at least one fan to at least one row of slot type nozzles arranged along the material and directing the ex-haust gas at the material.
The design according to the invention is particularly ad-30 vantageous where the furnace space of the preheating fur-nace is divided into several heating and control zones which communicate through a common exhaust gas duct. If in-dividual zones are turned off as the rated temperature is reached, they are not influenced by the other zones in gLZ~SG2~
spite of the connection through the exhaust gas duct. The flue gases simply flow out in longitudinal direction in the upper part of the common exhaust qas duct, with preference into a preheating ~one or for preheating the material in 5 an upstream preheating furnace for optimum exploitation of the heat capacity of the fuel in this manner in a furnace group consisting of the preheating furnace and further heat-ing furnaces connected in series downstream thereof.
The invention will be described further, by way of e~ample, -10 with reference to cross sections of two preheating furnaces actually constructed.
In the drawings:
Fig. 1 is a cross section along line l-I of fig. 3 through a first embodiment of a preheating furnace according to the invention;
Fig. 2 is a cross section at the same location through a second embodiment;
Fig. 3 is a lateral elevation, partly in section, of a fur-nace group consisting of a preheating furnace and an upstream heating furnace in accordance with a mo-dification of the invention; and Fig. 4 is a section along line IV-IV of fig. 3 through a heating furnace of the furnace grol~p connected up-stream of a preheating furnace according to fig. 1 or 2.
The preheating furnaces shown comprise a steel structure support frame 10.
In the lower furnace space there is a double strand con-veyor chain 13 to which carrier devices 12 are attached 30 for the material to be preheated, like bars or billets and which advances the material intermittently through the cy-lindrical furnace tunnel 15 formed by semicylindrical fur-nace shell halves 14. In their lower range the furnace ~z~s~
shells 14 are supported pivotably on carrier rails 16 and held in position from above by spacers 17.
With the embodiment shown in fig. 1 only one burner row in-cluding premixture burners 18 disposed in longitudinal rows 5 vertically of the plane of the drawing is provided per row of furnace shells 14. The burners 18 have burner nozzles 20 which project through openings 21 in the furnace shells in-to the cylindrical furnace tunnel 15 acting directly on the material. The burners 18 are so arranged that when preheat-10 ing material 1 of different diameters, ~he surface is utilized well for heat transfer and the temperature is dis-tributed in rotational symmetry across the cross section of the material. The burner nozzl~s 20 are adjusted to per-form such that the desired temperature distribution is ob-15 tained.
Instead of burners 18 hot gas nozzles may be provided for heating, acting on the material 1 for instance by hot air which can be heated electrically in known manner The exhaust gases leave the furnace space 15 in upwàrd di-20 rection through a longitudinal slot 30 defined by the fur nace shell halves 14 at the spacers 17 and then reach an exhaust gas duct 32 directly through a vertical channel ~. x From the exhaust gas duct the exhaust gas is delivered into a preheating zone, not shown, for the material 1 and located 25 upstream of the preheating furnace, for example by being sucked by means of fans, not shown. The exhaust gas duct includes a heat insulation, the lower insulation members 54 of which extend throughout the furnace length, leaving a gap for the furnace tunnel 15, and abutting from outside 30 against the central areas of the furnace shells 14. The lower insulat~nmembers 54 are supported by carrier beams 52 which are mounted stationarily on the support frame 10.
The principal or top portion of the exhaust gas duct 32 is defined by two ver~ical insulation members 5~ and an upper 35 insulation member 58 integral with them.
~Y
2~3 With the embodiment according to fig. 1 the insulation mem-bers-56, 58 of the upper part also extend throughout the furnace lengthO Thus the main portion 56, 58 may be removed as a whole. The furnace shells 14 continue to be held la-5 terally by the lower insulation members 54, yet upon remo-val of the spacers 17 they may be removed individually for replacement by easy inward pivoting about the respective fulcrum at the carrier rails 16.
The heat insulation comprises two layers for example, the 10 inner one consisting of ceramic fibers which are good heat insulators but bad for storing heat, while the outer one located in an area of lower temperatures is made of mineral fibers.
The embodiment shown in fig. 2 differs from the Gne accord-15 ing to fig. 1 only in that in addition to the lower burner row 18 an upper burner row 19 is provided per furnace shell row. An adjustable throttle valve 24 is arranged in the fuel supply line 23 for adjustment of the upper burners with respect to the lower burners.
20 The additional upper burner rows necessitate the position-ing of vertical insulation members 59, divided into segments in correspondence with the furnace shells 14, between the lower insulation members 54 extending throughout the furnace length and the principal or top portion of the exhaust gas 25 duct 32 whose insulation members 60, 62, 64 again form a united piece which is removable uniformly as a whole. For exchange of furnace shells, the piece 60, 62, 64 must be lifked off. Then the corresponding insulation members 59 must be removed so that upon removal of the spacers l? the 30 associated furnace shells 14 can be exchanged, as with the embodiment shown in fig. 1. The somewhat more complicated structuxe as compared to fig. 1 is the price for the bet-ter uniformity of soaklng - of the material achieved.
~zr~s~
The right half of fig. 3 shows a lateral elevation of a pre-heating furnace according to fig. l or 2, here designated 9~, whereas the left half shows an upstream preheating furnace which is heated by the exhaust gases from said pre-5 heating furnace. To this end the exhaust gas duct 32 opensby an aperture 33 in the right end surface 34, as seen in fig. 3, of the preheating furnace designated, in general, by reference numeral 40 and illustrated in greater detail in fig. 4. In the furnace space 41 which communicates with lO the exhaust gas duct 32 through the aperture 33 and is pro- -tected by a heat insulation 42 similar to that of the pre-heating furnace 90 there are se~eral circulation zones one behind the other, for example two circulation zones 471 48 each including a fan 43 sucking the exhaust gas in the di-l5 rection of the arrows F in fig. 3 out of the exhaust gasduct 32 into the furnace space 41 and then directing it through two rows of slot type nozzles 44 on to the material l, the nozzles being arranged at both sides so as to con-verge toward the material l. The material l is fed in con-20 veying direction T through treatment spaces 45 of each cir-culation zone47~4~by means of the double strand conveyor chain 13 which passes through both furnaces 40, 90. Subse-~ quently the exhaust gas is sucked out of the treatmentspaces 45 by means of the fans 43 and recirculated or dis-25 charged through an outlet 46.
In the circulation zones 47, 48 succeeding each other fromright to left in fig. 3 temperatures are established which decrease in a direction opposite to the conveying direc-tion T. Controllable admission in each circulation zone re-sults from this cascade-like exhaust gas guidance, and the heat capaeity of the exhaust gas is utilized in optimum fashion. Thus the furnace group aeeording to figs. 3 and 4 is characterized by particular economy, i.e. especially low fuel consumption.
47,48
The heat insulation comprises two layers for example, the 10 inner one consisting of ceramic fibers which are good heat insulators but bad for storing heat, while the outer one located in an area of lower temperatures is made of mineral fibers.
The embodiment shown in fig. 2 differs from the Gne accord-15 ing to fig. 1 only in that in addition to the lower burner row 18 an upper burner row 19 is provided per furnace shell row. An adjustable throttle valve 24 is arranged in the fuel supply line 23 for adjustment of the upper burners with respect to the lower burners.
20 The additional upper burner rows necessitate the position-ing of vertical insulation members 59, divided into segments in correspondence with the furnace shells 14, between the lower insulation members 54 extending throughout the furnace length and the principal or top portion of the exhaust gas 25 duct 32 whose insulation members 60, 62, 64 again form a united piece which is removable uniformly as a whole. For exchange of furnace shells, the piece 60, 62, 64 must be lifked off. Then the corresponding insulation members 59 must be removed so that upon removal of the spacers l? the 30 associated furnace shells 14 can be exchanged, as with the embodiment shown in fig. 1. The somewhat more complicated structuxe as compared to fig. 1 is the price for the bet-ter uniformity of soaklng - of the material achieved.
~zr~s~
The right half of fig. 3 shows a lateral elevation of a pre-heating furnace according to fig. l or 2, here designated 9~, whereas the left half shows an upstream preheating furnace which is heated by the exhaust gases from said pre-5 heating furnace. To this end the exhaust gas duct 32 opensby an aperture 33 in the right end surface 34, as seen in fig. 3, of the preheating furnace designated, in general, by reference numeral 40 and illustrated in greater detail in fig. 4. In the furnace space 41 which communicates with lO the exhaust gas duct 32 through the aperture 33 and is pro- -tected by a heat insulation 42 similar to that of the pre-heating furnace 90 there are se~eral circulation zones one behind the other, for example two circulation zones 471 48 each including a fan 43 sucking the exhaust gas in the di-l5 rection of the arrows F in fig. 3 out of the exhaust gasduct 32 into the furnace space 41 and then directing it through two rows of slot type nozzles 44 on to the material l, the nozzles being arranged at both sides so as to con-verge toward the material l. The material l is fed in con-20 veying direction T through treatment spaces 45 of each cir-culation zone47~4~by means of the double strand conveyor chain 13 which passes through both furnaces 40, 90. Subse-~ quently the exhaust gas is sucked out of the treatmentspaces 45 by means of the fans 43 and recirculated or dis-25 charged through an outlet 46.
In the circulation zones 47, 48 succeeding each other fromright to left in fig. 3 temperatures are established which decrease in a direction opposite to the conveying direc-tion T. Controllable admission in each circulation zone re-sults from this cascade-like exhaust gas guidance, and the heat capaeity of the exhaust gas is utilized in optimum fashion. Thus the furnace group aeeording to figs. 3 and 4 is characterized by particular economy, i.e. especially low fuel consumption.
47,48
Claims (8)
1. A preheating furnace for elongated material, like bars, ingots, billets, and the like of metal, particularly alumi-num or aluminum alloys, comprising a furnace tunnel made of continuous or segmentally joined refractory furnace shells, particularly thin-walled furnace shells, and adapted to be heated by heater elements like burners, hot gas nozzles, and the like which extend through the shell walls and are directed toward the material introduced in longitudinal orientation in the furnace tunnel for direct heating of the same, and further comprising an exhaust has duct disposed in the upper furnace range, c h a r a c t e r i z e d in that the furnace tunnel (15) is integrated in the exhaust gas duct (32) which comprises a heat insulation . x
2. The preheating furnace as claimed in claim 1, charac-terized in that the heat insulation of the exhaust gas duct (32) covers the furnace shells (14) of the furnace tunnel (15) from outside at least in the central range.
3. The preheating furnace as claimed in claim 2, characterized in that the heat insulation is supported by support members (52) mounted stationarily on a support frame (10) of the furnace and comprises removable. insulation mem-bers (54,56,58;59,60,62,64) disposed above the same, the lower members (54) thereof affording lateral support and insulation of the furnace shells (14).
4. The preheating furnace as claimed in claim 3, charac-terized in that the lower insulating members (54) resting on the support members (52) are designed and mountable se-parately from the other insulation members (56,58;59,60,62, 64) defining the exhaust gas duct.
5. The preheating furnace as claimed in claim 4 with which lower and upper burner rows are provided, distributed around the circumference of the furnace tunnel, c h a r a c-t e r i z e d in that the burners (19) of the upper burner rows extend through removable insulation members (59), while the burners of the lower burner rows (18) are provid-ed in the lower range of the furnace shells which is not heat insulated, and in that each insulation member (59) through which burners (19) pass has the same length as corresponding segments (14) of the furnace shells.
6. The preheating furnace as claimed in one of claims 1 to 3; characterized in that all burner rows open into the furnace tunnel (15) below the heat insulation, and in that the exhaust gas duct (32) is designed as a removable assem-bly unit.
7. The preheating furnace as claimed in one of claims 1 to 3, characterized in that the heat insulation comprises at least one layer of ceramic fibers at the inside and at least one layer of mineral fibers at the outside.
8. A furnace group in which the exhaust gases of a pre-heating furnace as claimed in one of claims 1 to 3 heat an upstream preheating furnace which passes the exhaust gas through at least one fan to at least one row of slot type nozzles arranged along the material and directing the ex-haust gas at the material, c h a r a c t e r i z e d in that the exhaust gas duct (32) is arranged to be essential-ly aligned with a space (41) of the preheating furnace (40) which space contains the fan (43) and is likewise protected by a heat insulation (42), and opens into said space (41) at the front end (at 33).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000433271A CA1205628A (en) | 1983-07-27 | 1983-07-27 | Furnace for preheating elongated material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000433271A CA1205628A (en) | 1983-07-27 | 1983-07-27 | Furnace for preheating elongated material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1205628A true CA1205628A (en) | 1986-06-10 |
Family
ID=4125752
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000433271A Expired CA1205628A (en) | 1983-07-27 | 1983-07-27 | Furnace for preheating elongated material |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1205628A (en) |
-
1983
- 1983-07-27 CA CA000433271A patent/CA1205628A/en not_active Expired
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4541799A (en) | Preheating furnace for elongated material | |
| US4153236A (en) | Preheating furnace | |
| EP1144322B1 (en) | Method and furnace for heating glass sheets and method for making the furnace | |
| CA2677975C (en) | Burner arrangement | |
| US10151533B2 (en) | Device for transferring a metallurgical material | |
| JPS639002B2 (en) | ||
| CA1205628A (en) | Furnace for preheating elongated material | |
| US9551531B2 (en) | Device for transferring a metallurgical material | |
| JPS59500063A (en) | Preheating furnace for long materials | |
| US4432791A (en) | Ceramic radiant tube heated aluminum melter and method of melting aluminium | |
| US6668590B2 (en) | Forced convection heating furnace and method for heating glass sheets | |
| US5328084A (en) | Aluminum heat exchanger braze furnace | |
| US4444558A (en) | System for heating broadwise-end portions of metal material | |
| US3861859A (en) | Cooling of rotary furnace shell burner pipes and method | |
| AU2007226496B2 (en) | Equipment and method for heating gas in connection with sintering | |
| EP0249361A2 (en) | Gas burner forced convection heating of glass sheets | |
| US6802711B1 (en) | Apparatus for supporting material to be treated in continuously operated thermal treatment furnaces | |
| US2988350A (en) | Combustion apparatus | |
| EP0400348B1 (en) | Temperature-maintaining furnace for metallurgic products | |
| JPS609514A (en) | Device for heating end part of hot billet | |
| JPS5827935A (en) | Electric heating type heat treatment furnace for strip | |
| GB2198507A (en) | Stock heating furnaces | |
| Anosov | Reheating and heat treatment furnaces for the steel industry in Russia and CIS in the 21 st century | |
| JPH0371634B2 (en) | ||
| JPS61250118A (en) | Continuous annealing furnace for metallic strip |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |