Melt pipeline and metal melt conveying method

Abstract

The invention provides a melt pipeline and a metal melt conveying method, and belongs to the technical field of metallurgy, a device comprises a sealing pipeline, a melt switching device is arranged on the sealing pipeline, and the melt switching device comprises a water-cooling induction heating device, a conductive refractory material channel and a cooling enclosure; the water-cooling induction heating device comprises a water-cooling induction coil annularly arranged on the outer side of the sealing pipeline; the conductive refractory material channel is arranged in the sealing pipeline; a melt channel is formed in the conductive refractory material channel; the cooling enclosure is arranged on the sealing pipeline and located at the side end of the water-cooling induction coil. The problems that in the prior art, when melt is conveyed through a melt pipeline, a resistance heating body needs to be arranged on the outer wall of the melt pipeline, the circulation state of the melt in the melt pipeline is controlled through opening and closing of a valve installed on the pipeline, heat loss is large, and the requirement for the heat resistance of materials is high can be solved.

Description

Technical Field

[0001] The present invention relates to the field of metallurgical technology, and more specifically, to a melt pipeline and a method for conveying molten metal. Background Art

[0002] In the field of industrial applications, especially in metal smelting processes, controlling the flow and cut-off state of high-temperature melts (such as metal liquid or slag fluid) in pipelines is a common problem in high-temperature melt transportation.

[0003] At present, in order to keep the high-temperature metal liquid or slag fluid in the pipeline in a flowing state to avoid pipeline blockage, the generally adopted method is to heat the pipeline wall by a conventional resistance heating body, and use the pipeline wall to transfer heat to the fluid in the pipeline to increase the temperature of the fluid in the pipe, so as to keep it in a flowing state; the control method for the flow state of the melt in the pipeline is to install valves on the pipeline to meet the requirements of the transportation project of the high-temperature metal liquid or slag fluid.

[0004] In the above-mentioned scheme for controlling the flow of the hot melt in the pipeline, when the resistance heating element directly heats the melt pipeline, the heat loss on the outer side of the resistance heating element is large, and the circulation and cut-off state of the high-temperature melt in the pipeline are controlled by the resistance heating element and the valve, which requires high heat resistance of the materials of the resistance heating element and the valve. Therefore, the scheme of controlling the fluid by resistance heating and valve opening and closing is usually difficult to implement economically due to problems such as materials, structure, and condensation.

[0005] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present invention, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Summary of the invention

[0006] In view of the above problems, the purpose of the present invention is to provide a melt pipe and a method for conveying molten metal to solve the problem in the prior art that when a melt pipe is used to convey molten metal, a resistance heater needs to be set on the outer wall of the melt pipe and a valve needs to be set on the pipe, and the flow state of the melt in the melt pipe needs to be controlled by opening and closing the valve. This solution has the problems of large heat loss and high requirements on the heat resistance of the material.

[0007] The present invention provides a melt pipeline, comprising a sealed pipeline, on which a melt switch device is arranged, wherein:

[0008] The melt switch device includes a water-cooled induction heating device, a conductive refractory material channel and a cooling jacket; wherein,

[0009] The water-cooled induction heating device comprises a water-cooled induction coil arranged around the outside of the sealed pipe;

[0010] The conductive refractory material channel is arranged inside the sealed pipe; the inside of the conductive refractory material channel forms a melt channel;

[0011] The cooling jacket is arranged on the sealing pipe and is located at the side end of the water-cooled induction coil; a jacket water inlet and a jacket water outlet are respectively arranged at both ends of the cooling jacket.

[0012] In addition, a preferred solution is that the cooling jacket is arranged close to any one end or both ends of the water-cooled induction coil.

[0013] In addition, a preferred solution is that a water cooling channel is provided on the water-cooled induction coil; and a channel water inlet and a channel water outlet are provided on the water cooling channel.

[0014] In addition, a preferred solution is that the conductive refractory material channel is arranged in the middle of the sealed pipe.

[0015] In addition, a preferred solution is that an inner insulation material layer is provided between the outer side wall of the conductive refractory material channel and the inner side wall of the sealed pipe.

[0016] In addition, a preferred solution is that the inner insulation material layer is any one of a glass fiber layer, an asbestos layer, a rock wool layer, a silicate layer, and a carbon felt, or at least two of them combined in any order.

[0017] In addition, a preferred solution is that the sealed pipe is a non-magnetic sealed steel pipe.

[0018] In addition, a preferred solution is that a power supply is connected to the water-cooled induction coil.

[0019] In addition, a preferred solution is that the conductive refractory material channel is a graphite channel or other conductive refractory materials.

[0020] The present invention also provides a method for conveying molten metal, which uses the melt pipeline as described above to convey the melt, comprising the following steps:

[0021] Step S1, passing the melt to be transported into the interior of the melt channel from the inlet of the sealed pipe;

[0022] Step S2, according to the flow and cut-off requirements set in the melt conveying project, the melt switch device is used to control the flow and cut-off of the melt inside the melt channel until the melt pipeline completes the control of the melt conveying; wherein,

[0023] When the melt in the melt channel needs to be in a flowing state, the water-cooled induction coil is energized to heat the conductive refractory material channel and the melt in the melt channel, so that the melt is in a flowing state in the melt channel;

[0024] When it is necessary to cut off the melt in a flowing state in the melt channel, the water-cooled induction coil is placed in a power-off state, and the sealed pipe is locally cooled by cooling water introduced into the water-cooling channel through the water inlet, so that the conductive refractory material channel is cooled, and the melt in a flowing state in the melt channel is rapidly cooled and solidified, so as to cut off the melt.

[0025] It can be seen from the above technical scheme that the melt pipeline and the method for conveying molten metal provided by the present invention control the flow state of the melt in the pipeline by installing a melt switch device on the sealed pipeline, so that the water-cooled induction coil arranged on the outside of the sealed pipeline is in an energized state, and the conductive refractory material channel and the melt in the melt channel are heated to make the melt in a flowing state. The electromagnetic heating method has high thermal efficiency and less heat loss. When it is necessary to cut off the melt in a flowing state inside the sealed pipeline, the water-cooled induction coil is in an off-power state, and cooling water is introduced into the cooling sleeve to quickly cool the conductive refractory material channel and the melt in the melt channel, so that the melt solidifies to achieve the purpose of cutting off the flow in the pipe. Compared with the prior art of using valves to control the melt flow state, it has low requirements on material properties and high economy.

[0026] In order to achieve the above and related purposes, one or more aspects of the present invention include the features that will be described in detail later. The following description and the accompanying drawings describe some exemplary aspects of the present invention in detail. However, these aspects indicate only some of the various ways in which the principles of the present invention can be used. In addition, the present invention is intended to include all these aspects and their equivalents. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] By referring to the following description in conjunction with the accompanying drawings, and with a more comprehensive understanding of the present invention, other objects and results of the present invention will become more clear and easy to understand. In the accompanying drawings:

[0028] Figure 1 A schematic diagram of the structure of a melt pipeline according to an embodiment of the present invention;

[0029] Figure 2 A schematic diagram of the position setting of a cooling jacket according to an embodiment of the present invention;

[0030] Figure 3 A schematic diagram of another position setting of the cooling jacket according to an embodiment of the present invention;

[0031] Figure 4 The figure is a flow chart of a method for conveying molten metal according to an embodiment of the present invention.

[0032] In the attached drawings, 1-sealed pipe, 2-water-cooled induction coil, 3-conductive refractory material channel, 31-melt channel, 4-melt, 5-outer insulation material layer, 6-cooling jacket, 7-inner insulation material layer.

[0033] The same reference numerals throughout the drawings indicate similar or corresponding features or functions. DETAILED DESCRIPTION

[0034] In the following description, for the purpose of explanation, numerous specific details are set forth in order to provide a thorough understanding of one or more embodiments. However, it is apparent that these embodiments may also be implemented without these specific details.

[0035] In view of the above-mentioned prior art, when a melt pipe is used to transport molten metal, it is necessary to set a resistance heating body on the outer wall of the melt pipe and a valve on the pipe, and control the flow state of the melt in the melt pipe by opening and closing the valve. This solution has the problems of large heat loss and high requirements on the heat resistance of the material. A melt pipe and a method for transporting molten metal are proposed.

[0036] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0037] In order to illustrate the melt pipeline and the method for conveying molten metal provided by the present invention, Figure 1 The structure of the melt pipe according to an embodiment of the present invention is shown; Figure 2 shows the position of the cooling jacket according to an embodiment of the present invention; Figure 3 shows another position of the cooling jacket according to an embodiment of the present invention; Figure 4 The flowchart of the method for conveying molten metal according to an embodiment of the present invention is shown.

[0038] like Figures 1 to 3 As shown together, the melt pipeline provided by the present invention comprises a sealed pipeline 1, on which a melt switch device is arranged, wherein:

[0039] The melt switch device includes a water-cooled induction heating device, a conductive refractory material channel 3 and a cooling jacket 6; wherein,

[0040] The water-cooled induction heating device comprises a water-cooled induction coil 2 arranged around the outside of a sealed pipe 1;

[0041] The conductive refractory material channel 3 is arranged inside the sealed pipe 1; the inside of the conductive refractory material channel 3 forms a melt channel 31;

[0042] The cooling jacket 6 is arranged on the sealed pipe 1 and is located at the side end of the water-cooled induction coil 2; a jacket water inlet and a jacket water outlet are respectively arranged at both ends of the cooling jacket 6.

[0043] It should be noted that the melt switch device in the present invention can be installed on a certain section of the sealed pipe 1 according to actual needs, so as to realize the control of the melt flow state in the sealed pipe section. Multiple melt switch devices can also be arranged at intervals on the sealed pipe 1 to control the flow state of the melt in multiple sections of the sealed pipe differently according to the needs of the melt transportation project. The present invention does not make any special limitations on this.

[0044] By installing a melt switch device on the sealed pipe 1, the flow state of the melt in the pipe is controlled, so that the water-cooled induction coil 2 arranged on the outside of the sealed pipe 1 is in an energized state, and the conductive refractory material channel 3 and the melt in the melt channel 31 are heated to make the melt in a flowing state. The electromagnetic heating method has high thermal efficiency and less heat loss; when it is necessary to cut off the melt in a flowing state inside the sealed pipe 1, the water-cooled induction coil 2 is in an off-power state, and cooling water is introduced into the cooling sleeve 6 to quickly cool the conductive refractory material channel 3 and the melt in the melt channel 31, so that the melt solidifies to achieve the purpose of cutting off the flow in the pipe. Compared with the prior art of using valves to control the melt flow state, it has low requirements on material properties and high economy.

[0045] As a preferred solution of the present invention, an outer insulation material layer 5 is provided between the water-cooled induction coil 2 and the outer side wall of the melt pipe 1 .

[0046] The outer side of the melt pipe 1 is insulated by the outer insulation material layer 5 so that the external temperature of the melt pipe 1 will not be too high.

[0047] As a preferred solution of the present invention, the cooling jacket 6 is arranged close to any one end or both ends of the water-cooled induction coil 2 .

[0048] It should be noted that the cooling jacket 6 can be arranged at the rear end of the water-cooled induction coil 2. Figure 2 As shown, it can also be arranged at the front end of the water-cooled induction coil 2, such as Figure 3 As shown, two cooling jackets 6 may also be provided, that is, cooling jackets 6 are provided at both ends of the water-cooled induction coil 2 to cool the conductive refractory channel 3 and the melt 4 therein, thereby accelerating the cooling rate. The cooling jacket 6 may be connected to the same cooling water source as the water-cooled induction coil 2, or may use independent water sources, which is not particularly limited in the present invention.

[0049] As a preferred solution of the present invention, a water cooling channel is provided on the water-cooled induction coil 2; and a channel water inlet and a channel water outlet are provided on the water cooling channel.

[0050] It should be noted that the water cooling channel can be arranged inside the water cooling induction coil 2 or on one side of the water cooling induction coil 2, and the present invention does not specifically limit this. The cooling water flowing in from the channel water inlet flows along the water cooling channel to cool the water cooling induction coil 2.

[0051] As a preferred solution of the present invention, the conductive refractory material channel 3 is arranged in the middle of the outer seal 1.

[0052] The conductive refractory material channel 3 is arranged in the middle of the sealed pipe 1, so that the overall structure is more reasonable and the melt 4 in the melt channel 31 is heated more evenly.

[0053] As a preferred solution of the present invention, inner and outer insulation material layers 7 are provided between the outer side wall of the conductive refractory material channel 3 and the inner side wall of the sealed pipe 1 .

[0054] The inner side of the melt pipe 1 is insulated by the inner insulation material layer 7 to prevent the heat generated by the heating of the conductive refractory material channel 3 from affecting the external sealed pipe 1 .

[0055] As a preferred embodiment of the present invention, the inner and outer insulation material layers 7 are any one of glass fiber layer, asbestos layer, rock wool layer, silicate layer, carbon felt or at least two of them combined in any order.

[0056] As a preferred embodiment of the present invention, the outer insulation material layer 5 is any one of a glass fiber layer, an asbestos layer, a rock wool layer, a silicate layer, and a carbon felt, or at least two of them combined in any order.

[0057] It should be noted that the inner insulation material layer 7 and the outer insulation material layer 5 are preferably but not limited to any one of glass fiber layer, asbestos layer, rock wool layer, silicate layer, carbon felt or at least two of them combined in any order, and the present invention does not make any special limitation on this.

[0058] As a preferred embodiment of the present invention, the sealed pipe 1 is a non-magnetic sealed steel pipe.

[0059] The sealed pipe 1 is preferably but not limited to a steel pipe with non-magnetic sealing. When the water-cooled induction coil 2 is flowing with water and powered, the eddy current loss generated therein is small, so that the water-cooled induction coil 2 has a good heating effect on the conductive refractory material channel 3, and the steel pipe with non-magnetic sealing has good high-temperature stability.

[0060] As a preferred solution of the present invention, a power supply (not shown in the figure) is connected to the water-cooled induction coil 2. The water-cooled induction coil 2 is powered by the power supply.

[0061] As a preferred embodiment of the present invention, the conductive refractory material channel 3 is a graphite channel.

[0062] It should be noted that the conductive refractory material channel 3 is preferably, but not limited to, a graphite channel, and the water-cooled induction coil 2 has a better heating effect on it.

[0063] The method for conveying molten metal provided by the present invention uses the melt pipeline as described above to convey the melt, and comprises the following steps:

[0064] Step S1, passing the melt 4 to be transported into the melt channel 31 from the inlet of the sealed pipe 1;

[0065] Step S2, according to the flow and cut-off requirements set in the melt conveying project, the melt 4 in the melt channel 31 is controlled by the melt switch device to flow and cut off until the melt pipeline completes the conveying of the melt 4; wherein,

[0066] When the melt 4 in the melt channel 31 needs to be in a flowing state, the cooling jacket is in a water-off state, and the water-cooled induction coil 2 is energized to heat the conductive refractory material channel 3 and the melt 4 in the melt channel 31, so that the melt 4 is in a flowing state in the melt channel 31;

[0067] When it is necessary to cut off the melt 4 in a flowing state in the melt channel 31, the water-cooled induction coil 2 is turned off, and the sealing pipe 1 is cooled by cooling water introduced into the cooling jacket through the water inlet 21 to cool the conductive refractory material channel 3, thereby rapidly cooling and solidifying the melt 4 in a flowing state in the melt channel 31 to cut off the melt 4.

[0068] It can be seen from the above specific embodiments that the melt pipeline and the method for conveying molten metal provided by the present invention control the flow state of the melt in the pipeline by installing a melt switch device on the sealed pipeline, so that the water-cooled induction coil arranged on the outside of the sealed pipeline is in an energized state, and the conductive refractory material channel and the melt in the melt channel are heated to make the melt in a flowing state. The electromagnetic heating method has high thermal efficiency and less heat loss. When it is necessary to cut off the melt in a flowing state inside the sealed pipeline, the water-cooled induction coil is in an off-power state, and cooling water is introduced into the cooling sleeve to quickly cool the conductive refractory material channel and the melt in the melt channel, so that the melt solidifies to achieve the purpose of cutting off the flow in the pipe. Compared with the prior art of using valves to control the melt flow state, the material performance requirements are low and the economy is high.

[0069] As described above, the melt pipe and the method for conveying molten metal according to the present invention are described by way of example with reference to the accompanying drawings. However, those skilled in the art should understand that various improvements can be made to the melt pipe and the method for conveying molten metal according to the present invention without departing from the content of the present invention. Therefore, the protection scope of the present invention should be determined by the content of the attached claims.

Claims

1. A melt pipe, comprising a sealed pipe, characterized in that: A melt switch device is provided on the sealing pipe, wherein: The melt switch device includes a water-cooled induction heating device, a conductive refractory material channel and a cooling jacket; wherein, The water-cooled induction heating device comprises a water-cooled induction coil arranged around the outside of the sealed pipe; The conductive refractory material channel is arranged inside the sealed pipe; the inside of the conductive refractory material channel forms a melt channel; The cooling jacket is arranged on the sealing pipe and is located at the side end of the water-cooled induction coil; a jacket water inlet and a jacket water outlet are respectively arranged at both ends of the cooling jacket.

2. The melt pipe according to claim 1, characterized in that: The cooling jacket is arranged close to any one end or both ends of the water-cooled induction coil.

3. The melt pipe according to claim 1, characterized in that: A water cooling channel is provided on the water-cooled induction coil; A channel water inlet and a channel water outlet are arranged on the water cooling channel.

4. The melt pipe according to claim 1, characterized in that: The conductive refractory material channel is disposed in the middle of the sealed pipe.

5. The melt pipe according to claim 1, characterized in that: An inner heat insulating material layer is arranged between the outer side wall of the conductive refractory material channel and the inner side wall of the sealed pipe.

6. The melt pipe according to claim 5, characterized in that: The inner insulation material layer is any one of a glass fiber layer, an asbestos layer, a rock wool layer, a silicate layer, and a carbon felt, or at least two of them combined in any order.

7. The melt pipe according to claim 1, characterized in that: The sealed pipe is a non-magnetic sealed steel pipe.

8. The melt pipe according to claim 1, characterized in that: The water-cooled induction coil is connected with a power supply.

9. The melt pipe according to claim 1, characterized in that: The conductive refractory material channel is a graphite channel or other conductive refractory materials.

10. A method for conveying molten metal, characterized in that: The melt is transported by using the melt pipe as claimed in any one of claims 1 to 9, comprising the following steps: Step S1, passing the melt to be transported into the interior of the melt channel from the inlet of the sealed pipe; Step S2, according to the flow and cut-off requirements set in the melt conveying project, the melt switch device is used to control the flow and cut-off of the melt inside the melt channel until the melt pipeline completes the control of the melt conveying; wherein, When the melt in the melt channel needs to be in a flowing state, the water-cooled induction coil is energized to heat the conductive refractory material channel and the melt in the melt channel, so that the melt is in a flowing state in the melt channel; When it is necessary to cut off the melt in a flowing state in the melt channel, the water-cooled induction coil is placed in a power-off state, and the sealed pipe is locally cooled by cooling water introduced into the water-cooling channel through the water inlet, so that the conductive refractory material channel is cooled, and the melt in a flowing state in the melt channel is rapidly cooled and solidified, so as to cut off the melt.

Images