CA2181533A1 - Rotary melting furnace - Google Patents
Rotary melting furnaceInfo
- Publication number
- CA2181533A1 CA2181533A1 CA002181533A CA2181533A CA2181533A1 CA 2181533 A1 CA2181533 A1 CA 2181533A1 CA 002181533 A CA002181533 A CA 002181533A CA 2181533 A CA2181533 A CA 2181533A CA 2181533 A1 CA2181533 A1 CA 2181533A1
- Authority
- CA
- Canada
- Prior art keywords
- melting furnace
- shell
- cooling circuit
- enclosure
- flanges
- 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.)
- Abandoned
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
- F27B7/20—Details, accessories, or equipment peculiar to rotary-drum furnaces
- F27B7/38—Arrangements of cooling devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
- F27B7/20—Details, accessories, or equipment peculiar to rotary-drum furnaces
- F27B7/2083—Arrangements for the melting of metals or the treatment of molten metals
Abstract
This rotary melting furnace, where the material to be melted, thrust bycentrifugal forces against the cylindrical wall of the enclosure (1), protects it by an auto-crucible effect from the heat emitted by a central source (6, 46), comprises a unitary enclosure and a common cooling circuit, in principle hollowed out from the shell (2) and flanges (3, 4). Its parts can be connected by external connecting pies (29, 30, 36, 37). Circular, distribution and collecting grooves (58, 59), into which issue fixed ducts (10, 11) ensure a continuous circulation.
Description
ROTA~Y MELTING FURNACE
DESCRIPTION
5 The inventlon relates to a rotary melting furnace.
The melting of refractory products, such as zirconia and magnesia, which respectively melt at 2700 and 2800'C, imposes the use of special furnaces such as electric arc rotary furnaces. These furnaces comprise a cylindrical 10 enclosure, whose axis is occupied by ele~trodes between which is struck the arc and said enclosure is rotated so that the material to be melted collects on the enclosure wall and protects the enclosure from excessive heating, forming what is called an auto-crucible, because it only melts for the sur-face layer giving onto the centre of the furnace and remains at lower temper-L5 atures towards the outer layers adjacent to the enclosure. However, theenclosure has to be cooled, despite this protection provided by part of the material to be melted.
It is formed from three parts in a known furnace, namely two disk-shaped, 20 end flanges and a cylindrical shell joining them. The flanges are fLxed and only the shell rotates, which makes it necessary to reestablish the contin-uity of the enclosure by intercalated joints. The flanges are bolted to a fixed, external shell, which surrounds the rotary shell and supports it by means of bearings. The gap between the shells forms a chamber allocated to 25 the cooling oi the inner shell. For this purpose use is made of a sprinkl-ing circuit having a supply duct issuing at the top of the chamber, where it is terminated by sprinkling nozzles and a collecting duct lssuing at the bottom of the chamber.
30 Therefore the chamber must be insulated at its longitudinal edges by gaskets in order to prevent leaks and protect the bearings.
As the flanges must also be cooled and precautions taken to prevent arctransfers along the enclosure, it is necessary to add two cooling circuits 35 and numerous electrical insulation and sealing joints between the inner shell and the flanges on the one hand and the outer shell and other fixed parts of the installation on the other. The layout of the furnace then becomes very complicated.
B 12210.3 JCI
DESCRIPTION
5 The inventlon relates to a rotary melting furnace.
The melting of refractory products, such as zirconia and magnesia, which respectively melt at 2700 and 2800'C, imposes the use of special furnaces such as electric arc rotary furnaces. These furnaces comprise a cylindrical 10 enclosure, whose axis is occupied by ele~trodes between which is struck the arc and said enclosure is rotated so that the material to be melted collects on the enclosure wall and protects the enclosure from excessive heating, forming what is called an auto-crucible, because it only melts for the sur-face layer giving onto the centre of the furnace and remains at lower temper-L5 atures towards the outer layers adjacent to the enclosure. However, theenclosure has to be cooled, despite this protection provided by part of the material to be melted.
It is formed from three parts in a known furnace, namely two disk-shaped, 20 end flanges and a cylindrical shell joining them. The flanges are fLxed and only the shell rotates, which makes it necessary to reestablish the contin-uity of the enclosure by intercalated joints. The flanges are bolted to a fixed, external shell, which surrounds the rotary shell and supports it by means of bearings. The gap between the shells forms a chamber allocated to 25 the cooling oi the inner shell. For this purpose use is made of a sprinkl-ing circuit having a supply duct issuing at the top of the chamber, where it is terminated by sprinkling nozzles and a collecting duct lssuing at the bottom of the chamber.
30 Therefore the chamber must be insulated at its longitudinal edges by gaskets in order to prevent leaks and protect the bearings.
As the flanges must also be cooled and precautions taken to prevent arctransfers along the enclosure, it is necessary to add two cooling circuits 35 and numerous electrical insulation and sealing joints between the inner shell and the flanges on the one hand and the outer shell and other fixed parts of the installation on the other. The layout of the furnace then becomes very complicated.
B 12210.3 JCI
2 -- ~ ~
The object of the invention is to simplify rotary melting furnaces, part-icularly with regards to the devices linked with their support on a fixed frame, their cooling and the layout of the electrical insulation 30ints subdividing them into several parts.
s The inventors have found that these ob3ects can be achieved by making the shell integral with the flanges and by providing a single cooling circuit for the flanges and the shell, despite the difficulties in ensuring a corr-ect flow along said complex shaped, large surface enclosure, which imposes 10 high pressure drops.
In its novel design, the furnace can be supported from the flange by which the arc enters by means of a hollow shaft giving passage to one of the electrodes and the cooling circuit can be terminated at said shaft. The 15 sealing and cooling liquid supply devices are transferred at this location out of the enclosure and the furnace is then greatly simplified.
The circulation of cooling liquid can be facilitated by giving the circuit a shape or an orientation permitting, on rotating the furnace, to propel the 20 liquid in the flow direction by inertia forces. It is therefore possible to promote a spiral flow in the flanges and a helical flow along the shell.
The cooling circuit is advantageously hollowed from the flanges and shell and assumes the form of a countercurrent circuit, where the liquid circul-25 ates in the furnace forming two superimposed layers. In practice, the flan-ges and shell are generally produced separately and assembled and it would be difficult to connect the portions of the cooling circuit of these parts without adding gaskets or seals, which would be sub3ect to a high temper-ature and would again complicate the layout. It is therefore probably 30 better for the cooling circuLt portions to issue onto the outer face of the enclosure, without being interconnected, and being joined by pipes which pass round the connections of the shell to the flanges.
The invention is described in greater detail hereinafter relative to non-35 limitative embodiments and the attached drawings, wherein show:
B 12210. 3 .JCI
218~533 Fig. 1 A view of an embodiment of the invention.
Fig. 2 A view of another embodiment.
S Pig. 3 A detail of fig. 1 in section III-III.
Fig. 4 A detail of fig. I in section IV-IV.
Comment will firstly be made on fig. 1. The essence of the structure of the furnace is formed by an enclosure 1 constituted by a cylindrical shell 2 ~oined to a support flange 3 and a casting or pouring flange 4, both being in disk form. The support flange 3 is extended by a hollow shaft 5, coaxial to the shell 2 and which is occupied by an electrode 6 extending over a con-siderable part of the length of the enclosure 1, along the axis thereof and transferring the melting arc to another electrode 46, which traverses the pouring flange 4 at the location of a central taphole 56. The arc radiates towards the material to be melted, which covers the inner face of the shell 2 in operation, when the enclosure 1 rotates. The second electrode 7 is withdrawn prior to the discharge of the molten material from the enclosure 1.
The shaft 5 is supported by a frame 7 by ~eans of a bearing 8. It is surr-ounded by a ring-type, cooling liquid collecting and distributing box or case 9, traversed at its top by a supply duct 10 and by a colLecting duct 11.
The box 9 is supported at its axial ends by a pair of bearings 12 and 13 joining it to the hollow shaft 5. ~wo pairs of joints 14, 15 and 16, 17 extend between the shaft S and the box 9 and, surrounded by the bearings 12, 13, insulate the collecting and supply ducts 11, 10 respectively from one another and from the bearings 12 and 13.
~he enclosure 1 is formed by three solid layers separated by superimposed channels forming the cooling circuit. In reality, these channels form a single channel throughout the enclosure L. Thus, in the support flange 3 is hollowed a supply channel 18 and a collecting channel 19, which are joined, planar and circular and extended by annular, concentric portions in the shaft 5. However, whereas the collecting channel L9 is completely free, the supply channel 18 is partly occupied in the flange 3 by a spiral 20 (visible B 12210.3 JCI
218l533 in fig. 4), which transforms it into a spiral channel in which a centrifugal flow of the cooling liquid is ensured as a result of the rotation direction of the enclosure 1. The supply 18 and collecting 19 channels are termin-ated in the hollow shaft by adjacent, circular grooves 58, 59 into which S respectively issue the supply 10 and collectLng 11 ducts. No matter what the positlon of the enclosure 1, the circulation of cooling water is con-sequently uninterrupted during rotation. This construction is clearly shown in fig. 3.
In the shell 2 is hollowed out a supply channel 21 and a return channel 22, which are concentric and annular. The return channel 22 is completely free, but the supply channel 21 is occupied by a helix 43, which transforms it into a helical channel, where the cooling liquid imposes a flow directed towards the pouring flange 4 when the enclosure 1 rotates.
The supply 21 ar~d return 22 channels do not extend to the end of the shell 2, but are instead terminated by orifices 23, 24 respectively on the side of the support flange 3, and 25, 26 respectively on the side of the pourlng flange 4. All these orifices 23 to 26 have a radial direction and con-sequently form bends with the channels 21 and 22.
Thus, the orifices 23 and 24 issue onto the outer face oE the enclosure 1 alongside orifices 27, 28 of the supply 18 and collecting 19 channels of the support flange 3. Curved pipes 29, 30 are then provided for respectively connecting orifices 23 and 27 and oriiices 24 and 28. As a result of this arrangement, the shell 2 can be assembled with the support flange 3 by bolts 31, without taking any special precautions and without it being necessary to provide complicated sealing systems.
The pouring flange 4 is itself provided with a supply channel 32 and a return channel 33 having respective orifices 34, 35 issuing at its periphery and alongside the orifices 25, 26. It is then merely necessary to add other curved pipes 36, 37 respectively between orifices 25, 34 and between orifices 26, 35, to ensure that the cooling circuit is perfectly unified between the supply 10 and collecting 11 ducts, the supply and return chan-nels 32, 33 respectively being connected at a junction 45 around the taphole 5~ .
B 12210.3 JCI
` 2181533 In the same way as for the other portions of the enclosure 1, the return channel 33, which is planar and circular, is completely freed, whereas the also planar, circular supply channel 32, parallel to the channel 33, is occupied by a spiral 44, which imposes a centripetal movement on the cooling 5 liquid when the enclosure 1 rotates. Therefore its orlentation is opposite to that of the spiral 22 oi the support flange 3.
A clamp 57 is connected to the shell 2, close to the pouring flange 4, by bolts 47 and carries a bevel gear 38, which meshes with a pinion 39 of a motor 40 fixed to the frame 7. Moreover, a bearing 41 is placed between the cla~p 57 and the frame 7. Thus, the bearings 8 and 41 perfectly support the assembly constituted by the enclosure 1 and the hollow shaft 5 extending it, by its two ends. The motor 40 rotates the enclosure 1 by means of the bevel gear 38 and the clamp 57.
The bolts 47 are also used for ~C5PI.lhl; ng the pouring flange 4 with the shell 2. They are insulating bolts, because it is wished to establish a barrier to flows of electricity and arcing between said two parts. For this purpose intercalation takes place of an insulating, circular lining 48, which is compressed by the bolts 47, between the facing faces of the shell 2 and the pouring flange 4. The curved tubes 36 and 37 are also insulating, in the same way as the cooling water, because it is demineralized. It has been found that no other insulating ~oint is necessary in practice, which differs greatly from the known furnace, even though it is here again neces-sary to have insulating sleeves 49, 50 in the hollow shaft 5 and the taphole 56 in order to insulate said parts from the electrodes 6 and 46, and insula-ting disks 51, 52 covering the inner faces of the flanges 3, 4, so that they do no t f ix the arc.
Fig. 2 illustrates a somewhat different layout. The elec~rodes 6, 46 and the insulating disks 51, 52 have been omitted to facilita~e understanding.
The motor 40 is dLsplaced and takes the ref erence 40 ', being located close .;
to the hollow shaf t S and its pinion 39 ' meshes with a bevel gear 38 ' on the periphery of the support flange 3. The latter is in one piece with the shell 2 and their supply channels 18 and 21 and their collecting 19 and B 12210.3 JCI
return 22 channels communicate directly wlthout an orifice or connection with the outside. The pouring flange 4 remains separated from the shell 2 by a circular, insulating lining 48 and thu6 there are once again curved pipes 36, 37 for connecting their channels.
s The bearing 41 has disappeared and is replaced by a series of rollers 62 mounted on a ring 63, which rlses from the frame 7 and surrounds the shell 2 close to the pouring flange 4, towards the location where the clamp 57, which has also disappeared, was located. However, it is possible to add to the shell 2 a collar 64 for supporting the rollers 62.
The box 9 supports the hollow shaf t 5 and enclosure l, being screwed to the frame 7. The bearings 12 and 13 must now support a greater weight and are _ advantageously replaced by stronger bearings, such as the roller bearings 12' and 13'.
Mention has only been made of electrical heating by coaxial electrodes 6 and 46. Other heating modes are compatible with the invention, such as gas or plasma torches, heating elements by the ~oule effect, inductors or wave 20 guides. The hollow shaft 5 can be replaced by a solid shaft Ln certain of the solutions, the heating device being introduced through the taphole s6.
The frame 7 is designed so as to tLlt on pouring and lowers the taphole 56.
The object of the invention is to simplify rotary melting furnaces, part-icularly with regards to the devices linked with their support on a fixed frame, their cooling and the layout of the electrical insulation 30ints subdividing them into several parts.
s The inventors have found that these ob3ects can be achieved by making the shell integral with the flanges and by providing a single cooling circuit for the flanges and the shell, despite the difficulties in ensuring a corr-ect flow along said complex shaped, large surface enclosure, which imposes 10 high pressure drops.
In its novel design, the furnace can be supported from the flange by which the arc enters by means of a hollow shaft giving passage to one of the electrodes and the cooling circuit can be terminated at said shaft. The 15 sealing and cooling liquid supply devices are transferred at this location out of the enclosure and the furnace is then greatly simplified.
The circulation of cooling liquid can be facilitated by giving the circuit a shape or an orientation permitting, on rotating the furnace, to propel the 20 liquid in the flow direction by inertia forces. It is therefore possible to promote a spiral flow in the flanges and a helical flow along the shell.
The cooling circuit is advantageously hollowed from the flanges and shell and assumes the form of a countercurrent circuit, where the liquid circul-25 ates in the furnace forming two superimposed layers. In practice, the flan-ges and shell are generally produced separately and assembled and it would be difficult to connect the portions of the cooling circuit of these parts without adding gaskets or seals, which would be sub3ect to a high temper-ature and would again complicate the layout. It is therefore probably 30 better for the cooling circuLt portions to issue onto the outer face of the enclosure, without being interconnected, and being joined by pipes which pass round the connections of the shell to the flanges.
The invention is described in greater detail hereinafter relative to non-35 limitative embodiments and the attached drawings, wherein show:
B 12210. 3 .JCI
218~533 Fig. 1 A view of an embodiment of the invention.
Fig. 2 A view of another embodiment.
S Pig. 3 A detail of fig. 1 in section III-III.
Fig. 4 A detail of fig. I in section IV-IV.
Comment will firstly be made on fig. 1. The essence of the structure of the furnace is formed by an enclosure 1 constituted by a cylindrical shell 2 ~oined to a support flange 3 and a casting or pouring flange 4, both being in disk form. The support flange 3 is extended by a hollow shaft 5, coaxial to the shell 2 and which is occupied by an electrode 6 extending over a con-siderable part of the length of the enclosure 1, along the axis thereof and transferring the melting arc to another electrode 46, which traverses the pouring flange 4 at the location of a central taphole 56. The arc radiates towards the material to be melted, which covers the inner face of the shell 2 in operation, when the enclosure 1 rotates. The second electrode 7 is withdrawn prior to the discharge of the molten material from the enclosure 1.
The shaft 5 is supported by a frame 7 by ~eans of a bearing 8. It is surr-ounded by a ring-type, cooling liquid collecting and distributing box or case 9, traversed at its top by a supply duct 10 and by a colLecting duct 11.
The box 9 is supported at its axial ends by a pair of bearings 12 and 13 joining it to the hollow shaft 5. ~wo pairs of joints 14, 15 and 16, 17 extend between the shaft S and the box 9 and, surrounded by the bearings 12, 13, insulate the collecting and supply ducts 11, 10 respectively from one another and from the bearings 12 and 13.
~he enclosure 1 is formed by three solid layers separated by superimposed channels forming the cooling circuit. In reality, these channels form a single channel throughout the enclosure L. Thus, in the support flange 3 is hollowed a supply channel 18 and a collecting channel 19, which are joined, planar and circular and extended by annular, concentric portions in the shaft 5. However, whereas the collecting channel L9 is completely free, the supply channel 18 is partly occupied in the flange 3 by a spiral 20 (visible B 12210.3 JCI
218l533 in fig. 4), which transforms it into a spiral channel in which a centrifugal flow of the cooling liquid is ensured as a result of the rotation direction of the enclosure 1. The supply 18 and collecting 19 channels are termin-ated in the hollow shaft by adjacent, circular grooves 58, 59 into which S respectively issue the supply 10 and collectLng 11 ducts. No matter what the positlon of the enclosure 1, the circulation of cooling water is con-sequently uninterrupted during rotation. This construction is clearly shown in fig. 3.
In the shell 2 is hollowed out a supply channel 21 and a return channel 22, which are concentric and annular. The return channel 22 is completely free, but the supply channel 21 is occupied by a helix 43, which transforms it into a helical channel, where the cooling liquid imposes a flow directed towards the pouring flange 4 when the enclosure 1 rotates.
The supply 21 ar~d return 22 channels do not extend to the end of the shell 2, but are instead terminated by orifices 23, 24 respectively on the side of the support flange 3, and 25, 26 respectively on the side of the pourlng flange 4. All these orifices 23 to 26 have a radial direction and con-sequently form bends with the channels 21 and 22.
Thus, the orifices 23 and 24 issue onto the outer face oE the enclosure 1 alongside orifices 27, 28 of the supply 18 and collecting 19 channels of the support flange 3. Curved pipes 29, 30 are then provided for respectively connecting orifices 23 and 27 and oriiices 24 and 28. As a result of this arrangement, the shell 2 can be assembled with the support flange 3 by bolts 31, without taking any special precautions and without it being necessary to provide complicated sealing systems.
The pouring flange 4 is itself provided with a supply channel 32 and a return channel 33 having respective orifices 34, 35 issuing at its periphery and alongside the orifices 25, 26. It is then merely necessary to add other curved pipes 36, 37 respectively between orifices 25, 34 and between orifices 26, 35, to ensure that the cooling circuit is perfectly unified between the supply 10 and collecting 11 ducts, the supply and return chan-nels 32, 33 respectively being connected at a junction 45 around the taphole 5~ .
B 12210.3 JCI
` 2181533 In the same way as for the other portions of the enclosure 1, the return channel 33, which is planar and circular, is completely freed, whereas the also planar, circular supply channel 32, parallel to the channel 33, is occupied by a spiral 44, which imposes a centripetal movement on the cooling 5 liquid when the enclosure 1 rotates. Therefore its orlentation is opposite to that of the spiral 22 oi the support flange 3.
A clamp 57 is connected to the shell 2, close to the pouring flange 4, by bolts 47 and carries a bevel gear 38, which meshes with a pinion 39 of a motor 40 fixed to the frame 7. Moreover, a bearing 41 is placed between the cla~p 57 and the frame 7. Thus, the bearings 8 and 41 perfectly support the assembly constituted by the enclosure 1 and the hollow shaft 5 extending it, by its two ends. The motor 40 rotates the enclosure 1 by means of the bevel gear 38 and the clamp 57.
The bolts 47 are also used for ~C5PI.lhl; ng the pouring flange 4 with the shell 2. They are insulating bolts, because it is wished to establish a barrier to flows of electricity and arcing between said two parts. For this purpose intercalation takes place of an insulating, circular lining 48, which is compressed by the bolts 47, between the facing faces of the shell 2 and the pouring flange 4. The curved tubes 36 and 37 are also insulating, in the same way as the cooling water, because it is demineralized. It has been found that no other insulating ~oint is necessary in practice, which differs greatly from the known furnace, even though it is here again neces-sary to have insulating sleeves 49, 50 in the hollow shaft 5 and the taphole 56 in order to insulate said parts from the electrodes 6 and 46, and insula-ting disks 51, 52 covering the inner faces of the flanges 3, 4, so that they do no t f ix the arc.
Fig. 2 illustrates a somewhat different layout. The elec~rodes 6, 46 and the insulating disks 51, 52 have been omitted to facilita~e understanding.
The motor 40 is dLsplaced and takes the ref erence 40 ', being located close .;
to the hollow shaf t S and its pinion 39 ' meshes with a bevel gear 38 ' on the periphery of the support flange 3. The latter is in one piece with the shell 2 and their supply channels 18 and 21 and their collecting 19 and B 12210.3 JCI
return 22 channels communicate directly wlthout an orifice or connection with the outside. The pouring flange 4 remains separated from the shell 2 by a circular, insulating lining 48 and thu6 there are once again curved pipes 36, 37 for connecting their channels.
s The bearing 41 has disappeared and is replaced by a series of rollers 62 mounted on a ring 63, which rlses from the frame 7 and surrounds the shell 2 close to the pouring flange 4, towards the location where the clamp 57, which has also disappeared, was located. However, it is possible to add to the shell 2 a collar 64 for supporting the rollers 62.
The box 9 supports the hollow shaf t 5 and enclosure l, being screwed to the frame 7. The bearings 12 and 13 must now support a greater weight and are _ advantageously replaced by stronger bearings, such as the roller bearings 12' and 13'.
Mention has only been made of electrical heating by coaxial electrodes 6 and 46. Other heating modes are compatible with the invention, such as gas or plasma torches, heating elements by the ~oule effect, inductors or wave 20 guides. The hollow shaft 5 can be replaced by a solid shaft Ln certain of the solutions, the heating device being introduced through the taphole s6.
The frame 7 is designed so as to tLlt on pouring and lowers the taphole 56.
3 12210,3 JCI
Claims (10)
1. Rotary melting furnace comprising an enclosure (1) formed by a cylind-rical shell (2) between two flanges (3, 4) and a cooling circuit for the enclosure, characterized in that the shell is connected to the flanges and that there is a single cooling circuit (18, 19, 21, 22, 32, 33, 29, 30, 36, 37) and has a part in the shell connected to a part in each of the flanges.
2. Melting furnace according to claim 1, characterized in that the cooling circuit is essentially hollowed from the enclosure.
3. Melting furnace according to claim 2, characterized in that each of the parts of the cooling circuit comprises two layers, where a countercurrent flow occurs.
4. Melting furnace according to claim 1, characterized in that the cooling circuit is intended to bring about a cooling fluid flow when the furnace rotates.
5. Melting furnace according to claim 4, characterized in that the part of the cooling circuit in the shell is at least partly in the form of a helical channel (21).
6. Melting furnace according to claim 4, characterized in that the parts of the cooling circuit in the flanges are at least partly in the form of a spiral channel (18, 32).
7. Melting furnace according to claim 1, characterized in that the parts of the cooling circuit are joined by pipes (29, 30, 36, 37) passing round the perimeters for joining the shell to the flanges.
8. Melting furnace according to claim 1, characterized in that it comprises a shaft (5) for rotating and supporting the furnace fixed to one of the flanges (3).
9. Melting furnace according to claim 8, characterized in that the rotation shaft is supported by bearings (8, 12', 13').
10. Melting furnace according to claim 8, characterized in that the cooling circuit extends in the shaft (5), where it terminates in at least one circular groove (58, 59) on which opens a respective, fixed duct (10, 11) perpendicular to the shaft.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9509462A FR2737554B1 (en) | 1995-08-03 | 1995-08-03 | ROTATING FUSION OVEN |
| FR9509462 | 1995-08-03 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2181533A1 true CA2181533A1 (en) | 1997-02-04 |
Family
ID=9481685
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002181533A Abandoned CA2181533A1 (en) | 1995-08-03 | 1996-07-18 | Rotary melting furnace |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US5711664A (en) |
| EP (1) | EP0760456B1 (en) |
| JP (1) | JPH09119778A (en) |
| KR (1) | KR100436176B1 (en) |
| CA (1) | CA2181533A1 (en) |
| DE (1) | DE69609022T2 (en) |
| FR (1) | FR2737554B1 (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6105272A (en) * | 1998-06-22 | 2000-08-22 | Cabot Corporation | High temperature rotating vacuum kiln for heat treating solid particulate material under a vacuum |
| US6042370A (en) * | 1999-08-20 | 2000-03-28 | Haper International Corp. | Graphite rotary tube furnace |
| KR100619481B1 (en) * | 2004-08-02 | 2006-09-08 | 이우범 | Codirectional rotary kiln with a rectangle bar |
| CN101936652A (en) * | 2010-09-05 | 2011-01-05 | 江苏金能环境科技有限公司 | Heat side kilneye protective cover for rotary kiln |
| US9284210B2 (en) | 2014-03-31 | 2016-03-15 | Corning Incorporated | Methods and apparatus for material processing using dual source cyclonic plasma reactor |
| US9533909B2 (en) | 2014-03-31 | 2017-01-03 | Corning Incorporated | Methods and apparatus for material processing using atmospheric thermal plasma reactor |
| US9550694B2 (en) | 2014-03-31 | 2017-01-24 | Corning Incorporated | Methods and apparatus for material processing using plasma thermal source |
| US20160200618A1 (en) | 2015-01-08 | 2016-07-14 | Corning Incorporated | Method and apparatus for adding thermal energy to a glass melt |
Family Cites Families (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR527701A (en) * | 1920-11-26 | 1921-10-29 | Andre Simon Cerf | Rotary furnace for melting metals and alloys such as bronze, brass, tin and others |
| US2702743A (en) * | 1948-08-12 | 1955-02-22 | Koppers Co Inc | Method and apparatus for preheating gaseous and vaporous reagents in powdered fuel gasification |
| FR1526999A (en) * | 1967-02-20 | 1968-05-31 | Commissariat Energie Atomique | Rotary melting furnace |
| CH512045A (en) * | 1970-02-04 | 1971-08-31 | Holderbank Man & Beratung Ag | Cooling device for the outlet of a rotary drum furnace |
| US3751220A (en) * | 1972-11-24 | 1973-08-07 | Allis Chalmers | Fluid delivery system for rotary kiln |
| FR2398261A1 (en) * | 1977-07-20 | 1979-02-16 | Oconnor Chadwell | Rotating fluidized bed combustor - has sand rotated in horizontal cylindrical drum with steam blown through heated falling sand |
| US4185984A (en) * | 1978-02-06 | 1980-01-29 | Union Carbide Corporation | Process for producing glass in a rotary furnace |
| DE3039212A1 (en) * | 1980-10-17 | 1982-05-19 | Metallgesellschaft Ag, 6000 Frankfurt | METHOD FOR THE THERMAL TREATMENT OF PROTECTIVE GOODS IN THE TURNTUBE |
| US4443186A (en) * | 1982-04-14 | 1984-04-17 | The United States Of America As Represented By The United States Department Of Energy | Solar heated rotary kiln |
| US4785746A (en) * | 1985-04-25 | 1988-11-22 | Trw Inc. | Carbonaceous slurry combustor |
| DE3534991A1 (en) * | 1985-10-01 | 1987-04-02 | Gutehoffnungshuette Man | TURN TUBE COOLER |
| US4836775A (en) * | 1985-12-23 | 1989-06-06 | Ppg Industries, Inc. | Air cooled rotary kiln collar |
| KR900002421Y1 (en) * | 1987-04-28 | 1990-03-26 | 일양안티몬주식회사 | Smelting apparatus for antimony |
| US4948365A (en) * | 1989-05-24 | 1990-08-14 | Zond Systems, Inc. | High-temperature, gas-burning furnace |
| US5000680A (en) * | 1990-02-15 | 1991-03-19 | Boliden Allis, Inc. | Rotary kiln |
| AU2449092A (en) * | 1991-08-09 | 1993-03-02 | New England Deaconess Hospital | A method of inducing hemoglobin synthesis in red blood cells and uses therefor |
| DE4419543C1 (en) * | 1994-06-03 | 1996-02-08 | Noell Gmbh | Rotary tube with cover cooling for combustion installations |
| US5515794A (en) * | 1995-01-23 | 1996-05-14 | Texaco Inc. | Partial oxidation process burner with recessed tip and gas blasting |
-
1995
- 1995-08-03 FR FR9509462A patent/FR2737554B1/en not_active Expired - Fee Related
-
1996
- 1996-07-18 CA CA002181533A patent/CA2181533A1/en not_active Abandoned
- 1996-07-22 US US08/681,062 patent/US5711664A/en not_active Expired - Fee Related
- 1996-07-30 KR KR1019960031513A patent/KR100436176B1/en not_active IP Right Cessation
- 1996-08-01 EP EP96401717A patent/EP0760456B1/en not_active Expired - Lifetime
- 1996-08-01 DE DE69609022T patent/DE69609022T2/en not_active Expired - Fee Related
- 1996-08-05 JP JP8206015A patent/JPH09119778A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| EP0760456B1 (en) | 2000-06-28 |
| JPH09119778A (en) | 1997-05-06 |
| KR100436176B1 (en) | 2004-11-06 |
| DE69609022D1 (en) | 2000-08-03 |
| EP0760456A1 (en) | 1997-03-05 |
| DE69609022T2 (en) | 2001-02-22 |
| FR2737554B1 (en) | 1997-08-29 |
| KR970011766A (en) | 1997-03-27 |
| FR2737554A1 (en) | 1997-02-07 |
| US5711664A (en) | 1998-01-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2181533A1 (en) | Rotary melting furnace | |
| CA1121422A (en) | Roof assembly for an electric arc furnace | |
| US9457418B2 (en) | Gas-cooled welding gun for an arc welding device | |
| CN1058126A (en) | The plasma burner of transferred arc | |
| EP0029416B1 (en) | Cooling panel for electric arc furnaces | |
| US4206312A (en) | Cooled jacket for electric arc furnaces | |
| AU680506B2 (en) | Material melting and incinerating reactor with improved cooling and electrical conduction | |
| KR100229977B1 (en) | A cooling roll | |
| US4197422A (en) | Cooled cover for an arc furnace | |
| RU2074345C1 (en) | Device for relieving thermal stress in furnace members cooled by sprinkling | |
| EP0151683B1 (en) | Cooling system for post-mixed burner | |
| US6132673A (en) | Cooling plates for shaft furnaces | |
| JP2942354B2 (en) | Transfer type arc discharge type plasma torch cooled by liquid | |
| US3510115A (en) | Rotary melting furnace with peripheral cooling means | |
| US6031861A (en) | Electrode and cooling element for a metallurgical vessel | |
| JPH07220894A (en) | Cooling structure for plasma torch | |
| US4610015A (en) | Electrode assembly for arc furnaces | |
| US3601379A (en) | Cooling structure for a metallurgical furnace | |
| EP0062986B1 (en) | Lance for repairing refining vessel | |
| GB2161591A (en) | Coreless induction furnace | |
| US4492423A (en) | Rotatable heavy-current connector | |
| KR20160053830A (en) | melting furnace | |
| CN212223035U (en) | Novel rotary oxygen lance | |
| CN212158163U (en) | Top-blown water-cooling rotary spray gun for high-temperature metallurgy | |
| EP0004443B1 (en) | Electrical discharge furnace |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |
Effective date: 20090310 |