Siphon deslagging device

Abstract

The utility model provides a siphon deslagging device, which belongs to the technical field of metallurgy and comprises a slag collecting and separating device and a deslagging channel. The slag collecting and separating device is arranged at the upper part of a molten pool of the vacuum induction furnace; the deslagging channel comprises an inner channel vertically arranged in the side wall of a heating crucible of the vacuum induction furnace, a transition channel communicated with the lower part of the inner channel and an outer channel connected with an outer port of the transition channel; the lower part of the outer channel is communicated with the outer port of the transition channel; and the pressure at the slag inlet at the upper part of the inner channel is greater than that at the slag outlet at the upper part of the outer channel. According to the utility model, the problems that in the metal smelting process of the vacuum induction furnace in the prior art, the slag is difficult to discharge, the slag and the gold are mixed out and the slag is difficult to continuously discharge under the vacuum condition due to poor fluidity of the slag and difficult separation of the slag and the gold can be solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to metallurgical technique field more specifically, relate to a siphon slagging device. BACKGROUND

[0002] Metal smelting, such as magnesium smelting technology, is mainly electrolytic method and silicon hot method. Among them, the electrolytic method has long raw material preparation process, produces a large amount of chlorine gas / sludge by electrolysis, and has large investment in processing by-products and sludge, thus causing burden to magnesium production. Typical silicon hot method has Magnesium process and Pijiang method, the former realizes continuous reaction of raw materials under liquid slag, the method has high reduction efficiency and short reduction time, but the problem of vacuum sealing of high-temperature electrode has not been solved, safety is not good, and cost is not superior. Pijiang method has simple process equipment, low investment and low cost, so the crude magnesium produced by Pijiang method accounts for more than 80% of the total magnesium output. However, Pijiang method has problems of high energy consumption, low resource utilization efficiency, serious environmental pollution, inability to realize mechanization and automation production, and high carbon emission intensity.

[0003] In view of the above problems existing in magnesium smelting process, it is an urgent requirement to develop an efficient, environmentally friendly, low-cost and energy-saving raw magnesium smelting process and equipment to realize industrial upgrading, transformation and structural adjustment, and also a demand of green development. Therefore, based on the transplanted steelmaking equipment RH, single nozzle refining furnace and VD technology, a vacuum liquid injection smelting method of magnesium (or other metals) is developed. The method obtains finished products by injecting reduced calcined white powder into excess reduced silicon-iron liquid, and the whole smelting process is continuously supplemented with reduced silicon-iron liquid through a feeding channel. If the slag can be continuously discharged through a slag discharge channel, the continuous production of magnesium (or other metals) smelting can be realized, which will be a brand-new process. The method has good thermodynamic and kinetic conditions, high reaction speed, and the production capacity of a single device is higher than that of Magnesium, the reduction temperature is significantly lower than that of Magnesium method, and the cost estimation is lower than that of Pijiang method. However, there is no suitable and effective slagging method for continuous discharge of liquid slag under vacuum condition and slag-gold separation. For example, the existing patent CN111270088B discloses a system and method for inductively heating liquid stirring continuous magnesium smelting, which provides a scheme for realizing continuous magnesium smelting by inductively heating liquid stirring, but does not specifically give the design of the slagging system. Patent CN117588946A discloses a continuous steel tapping induction melting furnace, which gives the system design for continuous steel tapping of induction furnace under atmosphere, but does not consider the sealing property of continuous steel tapping process, so it is not suitable for continuous slagging under vacuum condition.

[0004] In summary, at present, there is a lack of an effective scheme for continuous slagging of vacuum liquid injection smelting of metals in the prior art.

[0005] It should be noted that the information disclosed in the above background section is only used to strengthen the understanding of the background of the present application, and therefore can include information that does not constitute prior art known to those of ordinary skill in the art. Content of the present application

[0006] In view of the above problems, the purpose of the present application is to provide a siphon slagging device to solve the problem that there is no effective solution for continuous slagging of vacuum liquid injection smelting in the prior art.

[0007] The present application provides a siphon slagging device for siphon slagging of a vacuum induction furnace to the atmosphere, comprising: a molten slag collecting and separating device and a slagging channel; wherein,

[0008] The molten slag collecting and separating device is arranged on the upper part of the molten pool of the vacuum induction furnace, and comprises a molten slag collecting bucket, a metal liquid separating port arranged at the bottom of the molten slag collecting bucket, and a molten slag separating port arranged on the side wall of the molten slag collecting bucket;

[0009] The slagging channel comprises an inner channel vertically arranged inside the side wall of the heating crucible of the vacuum induction furnace, a transition channel in communication with the lower part of the inner channel, and an outer channel connected with the outer port of the transition channel; wherein,

[0010] The lower end of the inner channel passes through the heating crucible and is arranged in the vacuum space of the vacuum induction furnace; the inner port of the transition channel is in communication with the lower end of the inner channel, the outer port is horizontally and upwardly inclined and passes through the vacuum space and is arranged outside the vacuum induction furnace; the outer channel is vertically arranged, the lower part is in communication with the outer port of the transition channel, and the upper part is connected with a downwardly inclined discharge pipe; the pressure at the upper slag inlet of the inner channel is greater than the pressure at the upper slag outlet of the outer channel;

[0011] A first heating device is arranged on the outer side wall of the transition channel; a second heating device is arranged on the outer side wall of the outer channel;

[0012] A first heat preservation material layer is arranged outside the first heating device; a second heat preservation material layer is arranged outside the second heating device.

[0013] In addition, preferably, a first lower port is arranged at the lower end of the inner channel, and a first sealing cover is arranged at the first lower port; and / or, a second lower port is arranged at the lower end of the outer channel, and a second sealing cover is arranged at the second lower port; and / or, an upper port is arranged at the upper end of the outer channel, and a third sealing cover is arranged at the upper port; and / or, a fourth sealing cover is arranged at the discharge port of the discharge pipe.

[0014] In addition, preferably, a first refractory material sealing structure is arranged inside the first lower port; and / or a second refractory material sealing structure is arranged inside the second lower port; and / or a third refractory material sealing structure is arranged inside the upper port of the outer channel.

[0015] In addition, preferably, the angle between the outer port of the transition channel and the horizontal plane is 10-20°.

[0016] In addition, preferably, the first heating device is a first silicon molybdenum heating rod; and / or the second heating device is a second silicon molybdenum heating rod.

[0017] In addition, preferably, the molten slag collecting and separating device is arranged at a position 50-100 mm higher than the molten slag liquid level in the molten pool.

[0018] In addition, preferably, a mobile slag storage device is arranged below the discharge port of the discharge pipe.

[0019] In addition, preferably, the mobile slag storage device comprises a slag tank arranged below the discharge port of the discharge pipe and a slag tank car arranged below the slag tank.

[0020] In addition, preferably, the side walls of the transition channel and the outer channel each comprise, from inside to outside, a graphite layer, a heat insulation material layer and a steel structure layer.

[0021] In addition, preferably, a high-temperature resistant adhesive layer is arranged between the heat insulation material layer and the steel structure layer of the transition channel and between the heat insulation material layer and the steel structure layer of the outer channel.

[0022] From the above technical solutions can be known, the siphon slag device provided by the utility model, through the molten slag collection and separation device arranged on the upper portion of the molten pool of the vacuum induction furnace, the smelting slag generated in the molten pool is collected and slag-gold is separated, the separated molten slag enters the slag discharge channel from the molten slag separation opening on the side wall of the molten slag collection bucket, the inner channel and the outer channel are communicated by the transition channel, the pressure at the upper slag inlet of the inner channel is greater than the pressure at the upper slag outlet of the outer channel, since the pressure difference is generated between the molten slag in the inner channel and the slag outlet of the outer channel, that is, the molten slag entering the slag discharge channel is continuously discharged by using the siphon principle, the inner channel is heated by the inductive coil arranged around the outer periphery of the heating crucible, the transition channel is heated by the first heating device, and the outer channel is heated by the second heating device, so that the temperature of the slag discharge channel is kept at the preset slag discharge temperature, the flowability of the high-viscosity molten slag in the slag discharge channel is ensured, and thus the slag-gold separation and the continuous discharge of the molten slag under the vacuum condition are realized, the problems of the difficulty in slagging, the mixed slag-gold and the difficulty in continuous discharge of the molten slag under the vacuum condition caused by the poor flowability of the molten slag and the difficulty in slag-gold separation in the metal smelting process by using the vacuum induction furnace in the prior art are effectively solved. BRIEF DESCRIPTION OF DRAWINGS

[0023] Other objects and results of the utility model will be more apparent and easy to understand by referring to the following description in combination with the drawings and with the more comprehensive understanding of the utility model.

[0024] Figure 1 It is a structure schematic view of the siphon slag device according to the utility model embodiment;

[0025] Figure 2 It is a partial structure schematic view of the inner channel according to the utility model embodiment;

[0026] Figure 3 It is a structure schematic view of the molten slag collection and separation device according to the utility model embodiment;

[0027] Figure 4 It is a flow chart of continuously discharging the molten slag generated by smelting metal in the vacuum induction furnace by using the siphon slag device according to the utility model embodiment.

[0028] In the drawings, 1 - slag collection separation device, 11 - slag collection bucket, 12 - molten metal separation port, 13 - slag separation port, 21 - inner channel, 22 - transition channel, 23 - outer channel, 24 - discharge pipe, 25 - first heating device, 26 - second heating device, 27 - first heat insulation material layer, 28 - second heat insulation material layer, 31 - vacuum system, 32 - vacuum space, 33 - vacuum shell, 34 - induction coil, 35 - heating crucible, 36 - molten pool, 361 - slag, 362 - metal melt, 37 - feeding channel, 41 - first sealing cover, 42 - second sealing cover, 43 - third sealing cover, 44 - fourth sealing cover, 51 - first refractory material plugging structure, 52 - second refractory material plugging structure, 53 - third refractory material plugging structure, 61 - slag ladle, 62 - slag ladle car.

[0029] The same reference numbers in all the drawings indicate similar or corresponding features or functions. DETAILED DESCRIPTION

[0030] In the following description, for the purposes of providing a thorough understanding of one or more embodiments, numerous specific details are set forth. It is apparent, however, to one skilled in the art that the embodiments can be practiced without these specific details.

[0031] In view of the foregoing, there is a lack of an effective solution for continuous slagging of vacuum liquid injection smelting metal in the prior art, and a siphon slagging device is proposed.

[0032] The specific embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0033] In order to illustrate the siphon slagging device provided by the present application, Figure 1 The structure of the siphon slagging device according to the embodiments of the present application is shown; Figure 2 Part of the structure of the inner channel according to the embodiments of the present application is shown; Figure 3 The structure of the slag collection separation device according to the embodiments of the present application is shown; Figure 4 The process of continuously discharging the slag produced by smelting metal in a vacuum induction furnace using the siphon slagging device according to the embodiments of the present application is shown.

[0034] As Figures 1 to 3 The siphon slagging device provided by the present application is used for siphon slagging of a vacuum induction furnace to the atmosphere, and includes a slag collection separation device 1 and a slagging channel; wherein,

[0035] The slag collecting and separating device 1 is arranged at the upper portion of the molten pool 36 of the vacuum induction furnace, and comprises a slag collecting bucket 11, a molten metal separating port 12 arranged at the bottom of the slag collecting bucket 11, and a slag separating port 13 arranged on the side wall of the slag collecting bucket 11;

[0036] The slag outlet channel comprises an inner channel 21 vertically arranged in the inner side wall of the heating crucible 35 of the vacuum induction furnace, a transition channel 22 in communication with the lower portion of the inner channel 21, and an outer channel 23 connected with the outer port of the transition channel 22; wherein,

[0037] The lower end of the inner channel 21 penetrates through the heating crucible 35 and is arranged in the vacuum space 32 of the vacuum induction furnace; the inner port of the transition channel 22 is in communication with the lower end of the inner channel 21, and the outer port is horizontally and upwardly inclined and penetrates through the vacuum space 32 and is arranged outside the vacuum induction furnace; the outer channel 23 is vertically arranged, the lower portion is in communication with the outer port of the transition channel 22, and the upper portion is connected with a downwardly inclined discharge pipe 24; the pressure at the upper portion of the inner channel 21 is greater than the pressure at the upper portion of the outer channel 23;

[0038] The first heating device 25 is arranged on the outer side wall of the transition channel 22; and the second heating device 26 is arranged on the outer side wall of the outer channel 23;

[0039] The first heat preservation material layer 27 is arranged outside the first heating device 25; and the second heat preservation material layer 28 is arranged outside the second heating device.

[0040] The heat preservation material layers arranged outside the heating devices can achieve the heat preservation effect of the slag outlet channel.

[0041] It should be noted that the vacuum induction furnace in the utility model is a mature device in the prior art, which comprises a vacuum space 32 surrounded by a vacuum shell 33, a vacuum connecting hole is formed in the vacuum shell 33 to be connected with a vacuum system 31, so that the internal space of the vacuum shell 33 forms the vacuum space 32. A heating crucible 35 is arranged in the vacuum space 32, an induction coil 34 is arranged outside the heating crucible 35, and a vertical feeding channel 37 is arranged on the inner side wall of the heating crucible 35 to feed the metal raw material into the interior of the heating crucible 35 from the outside. The heating crucible 35 is heated and smelted by the induction coil 34, so that the metal raw material in the interior of the heating crucible 35 is heated and melted to form a molten pool 36. The top of the molten pool 36 is a slag 361, and the lower portion of the slag 361 is a metal melt 362. The smelted slag in the utility model refers to the slag with the metal melt.

[0042] Preferably, but not limited to, the heating crucible 35 is a graphite crucible, which has good heating effect.

[0043] The feeding channel 37 and the inner channel 21 are vertically arranged inside the sidewall of the heating crucible 35. The outer channel 23 is vertically arranged outside the vacuum induction furnace.

[0044] The slag outlet channel in the technical scheme of the utility model realizes continuous slagging out by using siphon principle, and by controlling continuous feeding speed, the molten slag is separated, and then the molten slag height in the inner channel 21 of the slag outlet channel and the pressure difference at the outlet of the outer channel 23 are utilized to continuously discharge the molten slag from the furnace to the outside, wherein the specific settings of the molten slag height of the inner channel 21 and the height of the slag outlet in the outer channel 23 (namely the discharge outlet of the outer channel 23 and the discharge pipe 24) and the channel diameter can be calculated according to Bernoulli equation, wherein the Bernoulli equation is:

[0045]

[0046] Q≤πr 2 ·V1;

[0047] Wherein Z1 is the height of the slag outlet of the outer channel 23, V1 is the slag flow rate of the slag outlet of the outer channel 23, Z0 is the height of the inner channel 21 (the molten slag height in the inner channel 21), V0 is the slag flow rate of the inner channel 21, Z1 and Z0 are both in m, V1 and V0 are both in m / s, P0 and P1 are respectively the inner and outer pressure of the vacuum induction furnace, both in Pa, ρ is the density of the molten slag, in kg / m 3 ; g is the acceleration of gravity, in m / s 2 ; h w is the total pressure loss of the slag outlet channel, in Pa; Q is the slag discharge amount per unit time, in m 3 / s; r is the radius of the inner channel 21 and the outer channel 23, both in m, and the radius of the inner channel 21 and the outer channel 23 is the same.

[0048] The molten slag generated in the molten pool 36 is collected and separated by the molten slag collecting and separating device 1 arranged at the upper portion of the molten pool 36 of the vacuum induction furnace, the separated molten slag enters the slag discharge channel from the molten slag separation opening 13 on the side wall of the molten slag collecting bucket 11, and the inner channel 21 and the outer channel 23 are communicated by the transition channel 22, and the molten slag entering the slag discharge channel is continuously discharged by utilizing the siphon principle due to the pressure difference between the molten slag in the inner channel 21 and the slag discharge opening of the outer channel 23; the inner channel 21 is heated by the inductive coil arranged around the outer periphery of the heating crucible 35, the transition channel 22 is heated by the first heating device 25, and the outer channel 23 is heated by the second heating device 26, so that the temperature of the slag discharge channel is kept at a preset slag discharge temperature, the flowability of the high-viscosity molten slag in the slag discharge channel is ensured, and the slag-gold separation and continuous discharge of the molten slag under the vacuum condition are realized; and the problems of difficult slag discharge, slag-gold mixing and difficult continuous discharge of the molten slag under the vacuum condition caused by poor flowability of the molten slag and difficult separation of the slag-gold in the metal smelting process by using the vacuum induction furnace in the prior art are effectively solved.

[0049] As a preferred scheme of the present application, a first lower port is arranged at the lower end of the inner channel 21, a first sealing cover 41 is arranged at the first lower port; and / or a second lower port is arranged at the lower end of the outer channel 23, a second sealing cover 42 is arranged at the second lower port; and / or an upper port is arranged at the upper end of the outer channel 23, a third sealing cover 43 is arranged at the upper port; and / or a fourth sealing cover 44 is arranged at the discharge port of the discharge pipe 24.

[0050] By arranging the ports and the sealing covers, the residual molten slag in the slag discharge channel can be conveniently cleaned.

[0051] It should be noted that during the metal vacuum smelting, the ports of the slag discharge channel need to be sealed by the sealing covers to ensure the vacuum degree in the system during the start-up or shutdown period.

[0052] As a preferred scheme of the present application, a first refractory material plugging structure 51 is arranged inside the first lower port; and / or a second refractory material plugging structure 52 is arranged inside the second lower port; and / or a third refractory material plugging structure 53 is arranged inside the upper port of the outer channel 23.

[0053] The main function of the refractory material plugging structure is to plug the channel and prevent the high-temperature slag from directly contacting the sealing cover and damaging the sealing cover.

[0054] As a preferred scheme of the present application, the inclination angle between the outer port of the transition channel 22 and the horizontal plane is 10-20°.

[0055] By setting the inclination angle between the outer port of the transition channel 22 and the horizontal plane to 10-20°, it can be avoided that too much liquid slag remains in the pipeline during shutdown.

[0056] As a preferred scheme of the present application, the first heating device 25 is a first silicon-molybdenum heating rod; and / or, the second heating device 26 is a second silicon-molybdenum heating rod.

[0057] It should be noted that the first heating device 25 and the second heating device 26 are preferably but not limited to silicon-molybdenum heating rods, and other devices capable of achieving the same heating effect can be used for replacement, and the present application does not make special limitation thereto.

[0058] As a preferred scheme of the present application, the slag collecting and separating device 1 is arranged at a position 50-100 mm higher than the liquid surface of the molten slag in the molten pool 36.

[0059] It should be noted that the slag collecting and separating device 1 arranged at a position 50-100 mm higher than the liquid surface of the molten slag in the molten pool 36 is a preferred scheme of the present application, and in actual application, the height of the slag collecting and separating device 1 can be determined according to the actual surge or spatter height of the smelted slag, and the present application does not make special limitation thereto.

[0060] As a preferred scheme of the present application, a mobile slag storage device is arranged below the discharge port of the discharge pipe 24.

[0061] As a preferred scheme of the present application, the mobile slag storage device comprises a slag tank 61 arranged below the discharge port of the discharge pipe 24 and a slag tank car 62 arranged below the slag tank 61.

[0062] The mobile slag storage device facilitates the storage and transportation of the molten slag.

[0063] As a preferred scheme of the present application, the side walls of the transition channel 22 and the outer channel 23 comprise, from inside to outside, a graphite layer, a heat preservation material layer and a steel structure layer in sequence.

[0064] The side walls of the transition channel 22 and the outer channel 23 comprise, from inside to outside, a graphite layer, a heat preservation material layer and a steel structure layer in sequence, so as to reduce the heat loss of the molten slag in the channels during the slagging operation.

[0065] As a preferred scheme of the present application, a high-temperature-resistant adhesive layer is arranged between the heat preservation material layer and the steel structure layer of the transition channel 22 and between the heat preservation material layer and the steel structure layer of the outer channel 23.

[0066] By setting the high-temperature adhesive layer between the heat insulation material layer and the steel structure layer of the transition channel 22 and between the heat insulation material layer and the steel structure layer of the outer channel 23, the external steel structure layer of the transition channel 22 and the outer channel 23 is prevented from cracking and damaging the system sealing property due to the different thermal expansion coefficients in the heating and cooling process during the start-up or shutdown process.

[0067] As Figure 4 shown, the process of continuously discharging the molten slag generated by smelting metal in the vacuum induction furnace using the siphon slagging device of the embodiment of the utility model comprises the following steps:

[0068] Step S1, installing the siphon slagging device on the vacuum induction furnace;

[0069] Step S2, collecting the smelting slag generated in the molten pool 36 by the molten slag collecting and separating device 1, and separating the collected smelting slag from the metal melt by using the metal liquid separating port 12 and the molten slag separating port 13, so that the separated molten slag enters the slagging channel from the molten slag separating port 13;

[0070] Step S3, heating the inner channel 21 by using the induction coil 34 arranged around the outer periphery of the heating crucible 35, heating the transition channel 22 by using the first heating device 25, and heating the outer channel 23 by using the second heating device 26, to ensure that the temperature of the slagging channel remains at the preset slagging temperature, so that the high-viscosity molten slag is continuously discharged from the vacuum induction furnace.

[0071] Preferably, but not limited to, the preset slagging temperature is 1450-1500 DEG C, which can be limited according to the actual metal molten slag temperature that can keep the fluidity. For most metal molten slag, 1450-1500 DEG C can ensure the fluidity of the molten slag.

[0072] It should be noted that the preset slagging temperature is preferably but not limited to 1450-1500 DEG C, which can be limited according to the actual metal molten slag temperature that can keep the fluidity. For most metal molten slag, 1450-1500 DEG C can ensure the fluidity of the molten slag.

[0073] It can be seen from the above specific embodiment that the siphon slagging device provided by the utility model, through the molten slag collecting and separating device arranged on the upper part of the molten pool of the vacuum induction furnace, the smelting slag generated in the molten pool is collected and slag-gold is separated, the separated molten slag enters the slagging channel from the molten slag separating port on the side wall of the molten slag collecting bucket, the inner channel and the outer channel are communicated by the transition channel, since the pressure difference is generated between the molten slag in the inner channel and the slagging port of the outer channel, that is, the molten slag entering the slagging channel is continuously discharged by using the siphon principle; the inner channel is heated by the inductive coil arranged around the outer periphery of the heating crucible, the transition channel is heated by the first heating device, and the outer channel is heated by the second heating device, so that the temperature of the slagging channel is kept at the preset slagging temperature, the flowability of the high-viscosity molten slag in the slagging channel is ensured, and therefore the slag-gold separation and the continuous discharge of the molten slag under the vacuum condition are realized; effectively solve the problems of the existing technology, that is, the metal smelting process is carried out by using the vacuum induction furnace, the slagging difficulty, the slag-gold mixed discharge and the difficulty of continuous discharge of the molten slag under the vacuum condition caused by the poor flowability of the molten slag and the difficulty of slag-gold separation.

[0074] The siphon slagging device according to the utility model is described above with reference to the drawings in an exemplary manner. However, it should be understood by those skilled in the art that various improvements can be made to the siphon slagging device according to the utility model described above without departing from the content of the utility model. Therefore, the protection scope of the utility model should be determined by the content of the appended claims.

Claims

1. A siphon slag discharge device for siphoning slag from a vacuum induction furnace to the atmosphere, characterized in that, include: Slag collection and separation device and slag discharge channel; among which, The slag collection and separation device is installed above the molten pool of the vacuum induction furnace. The slag collection and separation device includes a slag collection hopper, a molten metal separation port installed at the bottom of the slag collection hopper, and a slag separation port installed on the side wall of the slag collection hopper. The slag discharge channel includes an inner channel vertically disposed inside the side wall of the heating crucible of the vacuum induction furnace, a transition channel communicating with the lower part of the inner channel, and an outer channel connected to the outer port of the transition channel; wherein, The lower end of the inner channel passes through the heating crucible and is located within the vacuum space of the vacuum induction furnace; the inner port of the transition channel is connected to the lower end of the inner channel, and the outer port is horizontally inclined upward and passes through the vacuum space, located outside the vacuum induction furnace; the outer channel is vertically arranged, with its lower part connected to the outer port of the transition channel, and its upper part connected to a discharge pipe with a downwardly inclined opening; the pressure at the upper slag inlet of the inner channel is greater than the pressure at the upper slag outlet of the outer channel; A first heating device is provided on the outer wall of the transition channel; a second heating device is provided on the outer wall of the outer channel. A first insulation material layer is provided around the outside of the first heating device; a second insulation material layer is provided around the outside of the second heating device.

2. The siphon slag discharge device according to claim 1, characterized in that, A first lower port is provided at the lower end of the inner channel, and a first sealing cover is provided at the first lower port; and / or, A second lower port is provided at the lower end of the outer channel, and a second sealing cap is provided at the second lower port; and / or, An upper port is provided at the upper end of the outer channel, and a third sealing cover is provided at the upper port: and / or, A fourth sealing cap is provided at the discharge port of the discharge pipe.

3. The siphon slag discharge device according to claim 2, characterized in that, A first refractory material sealing structure is provided inside the first lower port; and / or, A second refractory material sealing structure is provided inside the second lower port; and / or, A third refractory material sealing structure is provided inside the upper port of the outer channel.

4. The siphon slag discharge device according to claim 1, characterized in that, The inclination angle between the outer port of the transition channel and the horizontal plane is 10-20°.

5. The siphon slag discharge device according to claim 1, characterized in that, The first heating device is a first silicon molybdenum heating rod; and / or, The second heating device is a second silicon molybdenum heating rod.

6. The siphon slag discharge device according to claim 1, characterized in that, The slag collection and separation device is installed in the molten pool at a height of 50-100 mm above the molten slag surface.

7. The siphon slag discharge device according to claim 1, characterized in that, A movable slag storage device is provided below the discharge port of the discharge pipe.

8. The siphon slag discharge device according to claim 7, characterized in that, The mobile slag storage device includes a slag tank located below the discharge port of the discharge pipe and a slag tanker truck located below the slag tank.

9. The siphon slag discharge device according to claim 1, characterized in that, The sidewalls of both the transition channel and the outer channel consist of a graphite layer, a thermal insulation material layer, and a steel structure layer, from the inside out.

10. The siphon slag discharge device according to claim 9, characterized in that, A high-temperature resistant adhesive layer is provided between the insulation material layer and the steel structure layer in the transition channel and between the insulation material layer and the steel structure layer in the outer channel.

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