A large-scale molten salt chlorination furnace

Abstract

The present invention relates to the technical field of titanium metallurgy production, and specifically relates to a large-scale molten salt chlorination furnace, which comprises a furnace body. The furnace body is composed of a furnace bottom, a furnace body and a furnace top. The furnace body includes an inverted conical section at the lower section and a cylindrical section at the upper part. The included angle between the inverted conical section and the ground is greater than 70°. Spray guns for introducing chlorine gas and a bottom salt discharge port are respectively provided at the lower end of the inverted conical section. An alternating current heating electrode is arranged in the middle of the inverted conical section, a feeding port is arranged in the middle of the cylindrical section, and a flue gas passage is arranged at the upper part of the cylindrical section. For this large-scale molten salt chlorination furnace, by reasonably setting the structural dimensions of the inverted conical section at the bottom of the furnace, increasing the inner diameter and height of the cylindrical section, the reaction space in the furnace is effectively increased, and the problem of low output of the current large-scale molten salt chlorination furnace is effectively solved. After optimizing and matching some auxiliary equipment, sufficient reaction can also be achieved under the condition of relatively large amounts of reactants. The bottom salt discharge port can be blocked by the plug locking device arranged at the bottom salt discharge port.

Description

Technical Field

[0001] The present invention relates to the technical field of titanium metallurgy production, and specifically, to a large-scale molten salt chlorination furnace. Background Art

[0002] Currently, the processes for producing TiCl4 in industry are mainly molten salt chlorination and fluidized bed chlorination. The chlorination reaction is mainly a process in which titanium-containing materials react with chlorine under the action of carbon to generate titanium tetrachloride. Producing titanium tetrachloride by molten salt chlorination is to react titanium slag and petroleum coke suspended in a molten salt medium with chlorine to produce titanium tetrachloride. The components of the molten salt are mainly NaCl, FeCl3, FeCl2, SiO2, AlCl3, CaCl2, MgCl2, KCl, etc.

[0003] Compared with fluidized bed chlorination furnaces, the daily output of titanium tetrachloride per single large-scale molten salt chlorination furnace in China can only reach about 130 t / d, which is less than half of the output of a single fluidized bed chlorination furnace. The titanium ore resources in our country generally have the characteristics of high Ca and Mg contents. If the total content of Ca and Mg exceeds 5%, it is no longer suitable to use fluidized bed chlorination, and molten salt chlorination is more suitable. Molten salt chlorination has the following advantages: (1) The chlorination temperature is relatively low (700 - 800 °C), and most impurities will not be chlorinated and enter TiCl4. The obtained TiCl4 has a low impurity content, and the purity of the TiCl4 product can reach more than 98%. Most impurities such as AlCl3, FeCl3, CaO, MgO, and SiO2 can be left in the molten salt medium; (2) It has a wide adaptability range for the particle size of titanium slag, and low-grade titanium slag can be used; (3) Less COCl2 and CO are generated during the reaction process, and the waste gas has no explosion hazard.

[0004] However, the existing large-scale molten salt chlorination furnace has a single structure and insufficient reaction space inside the furnace. When there are more reactants and they accumulate together, the reaction will be insufficient, resulting in a low production output per single furnace. Moreover, the sealing performance of the bottom salt discharge port is insufficient, and the plug is easy to loosen, causing accidental leakage of materials and affecting the production of the equipment. Summary of the Invention

[0005] The purpose of the present invention is to provide a large-scale molten salt chlorination furnace to solve the problems in the above-mentioned background art, that is, the existing large-scale molten salt chlorination furnace has a single structure, insufficient reaction space inside the furnace. When there are more reactants and they accumulate together, the reaction will be insufficient, resulting in a low production output per single furnace, and the sealing performance of the bottom salt discharge port is insufficient.

[0006] To achieve the above object, the present invention provides a large-scale molten salt chlorination furnace, including a furnace body, which is composed of a furnace bottom, a furnace body and a furnace top. The furnace body includes an inverted conical section at the lower part and a cylindrical section at the upper part. The angle between the inverted conical section and the ground is greater than 70°. Spray guns for introducing chlorine gas and a bottom salt discharge port are respectively provided at the lower end of the inverted conical section. An alternating current heating electrode is arranged in the middle of the inverted conical section, a feeding port is arranged in the middle of the cylindrical section, a flue gas passage is provided at the upper part of the cylindrical section, and a middle salt discharge port is arranged in the middle of the periphery of the furnace body. The middle salt discharge port includes a transition bin, the transition bin is connected to the furnace body through a rising port, and the transition bin is connected to the outside through a descending port.

[0007] Preferably, an explosion-proof manhole, a middle slurry return port and a top slurry return port are respectively arranged at the top of the furnace body.

[0008] Preferably, the total height of the furnace body is between 11500 - 12000 mm; the inner diameter corresponding to the small end of the inverted conical section is 1800 - 1900 mm; the inner diameter corresponding to the large-diameter end is 3600 - 4000 mm; the inner diameter of the cylindrical section is the same as that of the large-diameter end, and the height is 6500 - 7000 m.

[0009] Preferably, 4 spray guns for introducing chlorine gas are provided, which are evenly distributed along the periphery of the inverted conical section and are inserted downward obliquely.

[0010] Preferably, the position of the middle salt discharge port is 4500 mm from the furnace bottom.

[0011] Preferably, the height of the feeding port from the furnace bottom is 6300 - 6600 mm, and the height from the middle salt discharge port is 1800 - 1900 mm.

[0012] Preferably, there are 3 alternating current heating electrodes in total, which are evenly distributed at 120° along the inverted conical section respectively.

[0013] Preferably, an explosion-proof manhole cleaning hole is arranged around the explosion-proof manhole.

[0014] Preferably, a bottom salt discharge port plug locking device is installed on the upper part outside the bottom salt discharge port.

[0015] Preferably, the bottom salt discharge port plug locking device includes a pressing plate. The middle of the pressing plate is rotatably connected to a support frame through a rotating shaft. One end of the support frame is installed on the outer wall of the furnace body. A spring is installed on the inner side of the upper end of the pressing plate, a pressing rod is installed on the inner side of the lower end of the pressing plate, and a plug is installed at one end of the pressing rod.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. In this large-scale molten salt chlorination furnace, by reasonably setting the structural dimensions of the inverted conical section at the bottom of the furnace, increasing the inner diameter and height of the cylindrical section, the reaction space inside the furnace is effectively increased, and the production capacity of a single furnace can reach 200 t / d, effectively solving the problem of the low output of the current large-scale molten salt chlorination furnace.

[0018] 2. In this large-scale molten salt chlorination furnace, after optimizing and matching some auxiliary equipment, full reaction can be achieved even in the case of relatively large-capacity reactants.

[0019] 3. In this large-scale molten salt chlorination furnace, the bottom salt discharge port plug locking device can block the bottom salt discharge port, ensure sealing, and is convenient to open at any time for salt discharge operation, improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic diagram of the internal structure of the present invention;

[0021] Figure 2 is a schematic diagram of the structure of the bottom salt discharge port plug locking device in the present invention;

[0022] Figure 3 In the present invention Figure 1 is a partial enlarged view of part A in the present invention.

[0023] The meanings of each label in the figure are as follows:

[0024] 1. AC heating electrode; 2. Middle salt discharge port; 21. Transition bin; 22. Ascending port; 23. Descending port; 3. Feeding port; 4. Middle slurry return port; 5. Top slurry return port; 6. Furnace top; 7. Explosion-proof manhole cleaning hole; 8. Explosion-proof manhole; 9. Flue gas passage; 10. Bottom salt discharge port; 11. Bottom salt discharge port plug locking device; 111. Pressing plate; 112. Pressing rod; 113. Plug; 114. Support frame; 115. Rotating shaft; 116. Spring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0026] Embodiment 1

[0027] The present invention provides a large-scale molten salt chlorination furnace, which comprises a furnace body. The furnace body is composed of a furnace bottom, a furnace body and a furnace top 6. The furnace body includes an inverted conical platform section in the lower part and a cylindrical section in the upper part, effectively improving the volume of the chlorination furnace and ensuring normal operation under a production capacity load of 200 t / d. Compared with the traditional large-scale molten salt chlorination furnace, the output can be increased by about 50%.

[0028] Example 2

[0029] The present invention provides a large-scale molten salt chlorination furnace, which comprises a furnace body. The furnace body is composed of a furnace bottom, a furnace body and a furnace top 6. The furnace body includes an inverted conical platform section in the lower part and a cylindrical section in the upper part, effectively improving the volume of the chlorination furnace and ensuring normal operation under a production capacity load of 200 t / d. Compared with the traditional large-scale molten salt chlorination furnace, the output can be increased by about 50%. The angle between the inverted conical platform section and the ground is greater than 70°. The lower end of the inverted conical platform section is respectively provided with a chlorine injection lance and a bottom salt discharge port 10. The bottom salt discharge port 10 is mainly used for completely discharging the molten salt in the furnace during major overhaul of the large-scale molten salt chlorination furnace. When it is necessary to stop the furnace for maintenance and completely discharge the molten salt in the furnace, the plug in the bottom salt discharge channel is opened to discharge the molten salt. An alternating current heating electrode 1 is arranged in the middle of the inverted conical platform section, and its main function is to extend into the inverted conical platform body for heating and heat preservation of the molten salt.

[0030] Example 3

[0031] The present invention provides a large-scale molten salt chlorination furnace, which comprises a furnace body. The furnace body is composed of a furnace bottom, a furnace body and a furnace top 6. The furnace body includes an inverted conical platform section in the lower part and a cylindrical section in the upper part, effectively improving the volume of the chlorination furnace and ensuring normal operation under a production capacity load of 200 t / d. Compared with the traditional large-scale molten salt chlorination furnace, the output can be increased by about 50%. The angle between the inverted conical platform section and the ground is greater than 70°. The lower end of the inverted conical platform section is respectively provided with a chlorine injection lance and a bottom salt discharge port 10. The bottom salt discharge port 10 is mainly used for completely discharging the molten salt in the furnace during major overhaul of the large-scale molten salt chlorination furnace. When it is necessary to stop the furnace for maintenance and completely discharge the molten salt in the furnace, the plug in the bottom salt discharge channel is opened to discharge the molten salt. An alternating current heating electrode 1 is arranged in the middle of the inverted conical platform section, and its main function is to extend into the inverted conical platform body for heating and heat preservation of the molten salt. A feeding port 3 is arranged in the middle of the cylindrical section, and a flue gas passage 9 is arranged in the upper part of the cylindrical section for discharging smoke. A middle salt discharge port 2 is arranged in the middle of the periphery of the furnace body for middle salt discharge. The middle salt discharge port 2 includes a transition bin 21. The transition bin 21 is connected to the furnace body through a rising port 22 and is connected to the outside through a falling port 23. A sealing structure is arranged at the rising port 22 to ensure the sealing of the device.

[0032] Example 4

[0033] The present invention provides a large-scale molten salt chlorination furnace, which includes a furnace body. The furnace body is composed of a furnace bottom, a furnace body, and a furnace top <6>. The furnace body includes an inverted conical section in the lower part and a cylindrical section in the upper part, effectively improving the volume of the chlorination furnace and ensuring normal operation under a production capacity load of 200 t / d. Compared with traditional large-scale molten salt chlorination furnaces, the output can be increased by about 50%. The angle between the inverted conical section and the ground is greater than 70°. Spray guns for introducing chlorine gas and a bottom salt discharge port <10> are respectively provided at the lower end of the inverted conical section. The bottom salt discharge port <10> is mainly used to completely discharge the molten salt in the furnace during major overhauls of the large-scale molten salt chlorination furnace. When it is necessary to stop the furnace for maintenance and completely discharge the molten salt in the furnace, the plug in the bottom salt discharge channel is opened to discharge the molten salt. An alternating current heating electrode <1> is arranged in the middle of the inverted conical section, and its main function is to extend into the inverted conical body to heat and keep warm the molten salt. A feeding port <3> is arranged in the middle of the cylindrical section, and a flue gas passage <9> is provided in the upper part of the cylindrical section for smoke exhaust. A middle salt discharge port <2> is arranged in the middle of the periphery of the furnace body for middle salt discharge. The middle salt discharge port <2> includes a transition bin <21>. The transition bin <21> is connected to the furnace body through a rising port <22> and is connected to the outside through a descending port <23>. A sealing structure is provided at the rising port <22> to ensure the sealing of the device. An explosion-proof manhole <8>, a middle slurry return port <4>, and a top slurry return port <5> are respectively arranged at the top of the furnace body. During the specific implementation process, a pump can be used to return the slurry in the subsequent rinsing tank to the furnace for spraying. This operation can not only effectively reduce the load of the subsequent clarification process during production, but also effectively control the temperature during the intense reaction in the furnace, aiming to reduce the workload of the subsequent clarification process and control the huge heat released during the reaction after the furnace body expands.

[0034] Example 5

[0035] The present invention provides a large-scale molten salt chlorination furnace, which includes a furnace body. The furnace body is composed of a furnace bottom, a furnace body, and a furnace top 6. The furnace body includes an inverted conical section at the lower part and a cylindrical section at the upper part, effectively improving the volume of the chlorination furnace and ensuring normal operation under a production capacity load of 200 t / d. Compared with traditional large-scale molten salt chlorination furnaces, the output can be increased by about 50%. The angle between the inverted conical section and the ground is greater than 70°. Spray guns for introducing chlorine gas and a bottom salt discharge port 10 are respectively provided at the lower end of the inverted conical section. The bottom salt discharge port 10 is mainly used to completely discharge the molten salt in the furnace during major overhauls of the large-scale molten salt chlorination furnace. When it is necessary to stop the furnace for maintenance and completely discharge the molten salt in the furnace, the plug in the bottom salt discharge channel is opened to discharge the molten salt. An alternating current heating electrode 1 is arranged in the middle of the inverted conical section, and its main function is to extend into the inverted conical body to heat and keep warm the molten salt. A feeding port 3 is arranged in the middle of the cylindrical section, and a flue gas passage 9 is provided at the upper part of the cylindrical section for smoke exhaust. A middle salt discharge port 2 is arranged in the middle around the furnace body for middle salt discharge. The middle salt discharge port 2 includes a transition bin 21. The transition bin 21 is connected to the furnace body through a rising port 22 and is connected to the outside through a falling port 23. A plugging structure is arranged at the rising port 22 to ensure the sealing of the device. An explosion-proof manhole 8, a middle slurry return port 4, and a top slurry return port 5 are respectively arranged at the top of the furnace body. In the specific implementation process, a pump can be used to return the slurry in the subsequent rinsing tank to the furnace for spraying. This operation can not only effectively reduce the load of the subsequent clarification process during production, but also effectively control the temperature during the intense reaction in the furnace, aiming to reduce the workload of the subsequent clarification process and control the huge heat released during the reaction after the furnace body expands. The total height of the furnace body is between 11,500 - 12,000 mm; the inner diameter of the small end of the inverted conical section is 1,800 - 1,900 mm; the inner diameter of the large end is 3,600 - 4,000 mm; the inner diameter of the cylindrical section is the same as that of the large end, and the height is 6,500 - 7,000 m.

[0036] In this embodiment, 4 spray guns for introducing chlorine gas are provided, which are evenly distributed around the inverted conical section and are inserted downward obliquely.

[0037] In this embodiment, the position of the middle salt discharge port 2 is 4,500 mm from the furnace bottom. During actual production, it is necessary to regularly open the plug inside to discharge the waste molten salt generated during the reaction.

[0038] In this embodiment, the height of the feeding port 3 from the furnace bottom is 6,300 - 6,600 mm, and the height from the middle salt discharge port 2 is 1,800 - 1,900 mm, so as to ensure that the added materials can fully contact and react in the reaction cavity, and are not easily splashed by the boiling molten salt in the reaction cavity into the feeding port 3 to cause blockage of the feeding port 3, effectively ensuring the stable operation of the chlorination furnace and avoiding accidents such as low solid material content caused by poor feeding and molten salt splashing caused by foaming slag of the molten salt.

[0039] In this embodiment, there are a total of 3 AC heating electrodes 1, which are evenly distributed at 120° intervals along the inverted conical frustum section. A cleaning hole 7 for the explosion-proof opening is provided around the explosion-proof opening 8.

[0040] Embodiment 6

[0041] The present invention provides a large-scale molten salt chlorination furnace, which includes a furnace body. The furnace body is composed of a furnace bottom, a furnace body, and a furnace top 6. The furnace body includes an inverted conical frustum section in the lower part and a cylindrical section in the upper part, effectively increasing the volume of the chlorination furnace and ensuring normal operation under a production load of 200 t / d. Compared with traditional large-scale molten salt chlorination furnaces, the output can be increased by about 50%. The angle between the inverted conical frustum section and the ground is greater than 70°. Spray guns for introducing chlorine gas and a bottom salt discharge port 10 are respectively provided at the lower end of the inverted conical frustum section. The bottom salt discharge port 10 is mainly used to completely discharge the molten salt in the furnace during major repairs of the large-scale molten salt chlorination furnace. When it is necessary to shut down the furnace for maintenance and completely discharge the molten salt in the furnace, the plug in the bottom salt discharge channel is opened to discharge the molten salt. An AC heating electrode 1 is provided in the middle of the inverted conical frustum section, and its main function is to extend into the inverted conical frustum body for heating and heat preservation of the molten salt. A feeding port 3 is provided in the middle of the cylindrical section, and a flue gas passage 9 is provided in the upper part of the cylindrical section for smoke exhaust. A middle salt discharge port 2 is provided in the middle of the periphery of the furnace body for middle salt discharge. The middle salt discharge port 2 includes a transition bin 21. The transition bin 21 is connected to the furnace body through a rising port 22 and is connected to the outside through a descending port 23. A sealing structure is provided at the rising port 22 to ensure the sealing of the device. An explosion-proof opening 8, a middle slurry return port 4, and a top slurry return port 5 are respectively provided at the top of the furnace body. During the specific implementation process, a pump can be used to return the slurry in the subsequent rinsing tank to the furnace for spraying. This operation can not only effectively reduce the load of the subsequent clarification process during production, but also effectively control the temperature during the intense reaction in the furnace, aiming to reduce the workload of the subsequent clarification process and control the huge heat released during the reaction after the furnace body expands. The total height of the furnace body is between 11,500 - 12,000 mm; the inner diameter of the small end of the inverted conical frustum section is 1,800 - 1,900 mm; the inner diameter of the large end is 3,600 - 4,000 mm; the inner diameter of the cylindrical section is the same as that of the large end, and the height is 6,500 - 7,000 m.

[0042] In this embodiment, there are 4 spray guns for introducing chlorine gas, which are evenly distributed around the inverted conical frustum section and are inserted obliquely downward.

[0043] In this embodiment, the position of the middle salt discharge port 2 is 4,500 mm from the furnace bottom. During actual production, it is necessary to regularly open the plug inside to discharge the waste molten salt generated during the reaction.

[0044] In this embodiment, the height of the charging port 3 from the furnace bottom is 6300 - 6600 mm, and the height from the middle salt discharge port 2 is 1800 - 1900 mm, so as to ensure that the added materials can fully contact and react in the reaction chamber, and are not easily splashed into the charging port 3 by the boiling molten salt in the reaction chamber to cause blockage of the charging port 3, effectively ensuring the stable operation of the chlorination furnace, and avoiding low solid material content caused by poor feeding and molten salt splashing accidents caused by foaming slag of the molten salt.

[0045] In this embodiment, there are a total of 3 AC heating electrodes 1, which are evenly distributed at 120° along the inverted conical table section respectively, and cleaning holes 7 for the explosion-proof opening 8 are arranged around the explosion-proof opening 8.

[0046] In this embodiment, since the bottom salt discharge port 10 is located at the bottom of the furnace body, the pressure it receives is relatively large, which easily causes the plug of the bottom salt discharge port 10 to fail to block, resulting in accidental discharge of materials. Therefore, in order to further improve the sealing effect of the bottom salt discharge port 10 and avoid leakage of the bottom salt discharge port 10, a locking device 11 for the plug of the bottom salt discharge port 10 is installed on the upper part of the outer side of the bottom salt discharge port 10.

[0047] Furthermore, the locking device 11 for the plug of the bottom salt discharge port 10 includes a pressing plate 111. The middle part of the pressing plate 111 is rotationally connected to a support frame 114 through a rotating shaft 115. One end of the support frame 114 is installed on the outer wall of the furnace body. A spring 116 is installed on the inner side of the upper end of the pressing plate 111, and a pressing rod 112 is installed on the inner side of the lower end of the pressing plate 111. A plug 113 is installed at one end of the pressing rod 112. By the action of the spring 116 on the upper end of the pressing plate 111, the lower end of the pressing plate 111 pushes the pressing rod 112 into the bottom salt discharge port 10, and the inside of the bottom salt discharge port 10 is tightly blocked by the plug 113, thereby sealing it.

[0048] When the large-scale molten salt chlorination furnace of the present invention is in use, first, materials are added from the charging port 3, chlorine gas is sprayed through a spray gun to react with the materials, and the AC heating electrode 1 extends into the inverted conical table body to heat and keep warm the molten salt. After the reaction, the middle salt discharge port 2 can discharge the salt.

[0049] During subsequent flushing, a pump can be used to return the slurry in the subsequent flushing tank to the furnace through the middle slurry return port 4 and the top slurry return port 5 for spraying. When the large-scale molten salt chlorination furnace is shut down for major overhaul, press the upper end of the pressing plate 111 to make the lower pressing rod 112 move outwards, and then the plug 113 is separated from the bottom salt discharge port 10, and the molten salt in the furnace is completely discharged through the bottom salt discharge port 10.

[0050] The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments, and the above embodiments and the descriptions in the specification are only preferred examples of the present invention, and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. A large-scale molten salt chlorination furnace, comprising a furnace body, characterized in that: The furnace body is composed of a furnace bottom, a furnace body, and a furnace top (6). The furnace body includes an inverted conical table section at the lower part and a cylindrical section at the upper part. The angle between the inverted conical table section and the ground is greater than 70°. Spray guns for introducing chlorine gas and a bottom salt discharge port (10) are respectively provided at the lower end of the inverted conical table section. An alternating current heating electrode (1) is arranged in the middle of the inverted conical table section, a feeding port (3) is arranged in the middle of the cylindrical section, a flue gas passage (9) is arranged at the upper part of the cylindrical section, and a middle salt discharge port (2) is arranged in the middle of the periphery of the furnace body. The middle salt discharge port (2) includes a transition bin (21). The transition bin (21) is connected to the furnace body through a rising port (22), and the transition bin (21) is connected to the outside through a descending port (23). A bottom salt discharge port plug locking device (11) is installed on the upper outer side of the bottom salt discharge port (10). The bottom salt discharge port plug locking device (11) includes a pressing plate (111). The middle of the pressing plate (111) is rotationally connected to a support frame (114) through a rotating shaft (115). One end of the support frame (114) is installed on the outer wall of the furnace body. A spring (116) is installed on the inner side of the upper end of the pressing plate (111), and a pressing rod (112) is installed on the inner side of the lower end of the pressing plate (111). A plug (113) is installed at one end of the pressing rod (112). An explosion-proof manhole (8), a middle slurry return port (4), and a top slurry return port (5) are respectively arranged at the top of the furnace body. The total height of the furnace body is between 11500 - 12000 mm; the inner diameter corresponding to the small opening of the inverted conical table section is 1800 - 1900 mm; the inner diameter corresponding to the large diameter end is 3600 - 4000 mm; the inner diameter of the cylindrical section is the same as that of the large diameter end, and the height is 6500 - 7000 m.

2. The large molten salt chlorination furnace according to claim 1, wherein: There are 4 spray guns for introducing chlorine gas, which are evenly distributed around the inverted conical table section and are inserted downward obliquely.

3. The large molten salt chlorination furnace according to claim 1, characterized in that: The position of the middle salt discharge port (2) is 4500 mm from the furnace bottom.

4. The large-scale molten salt chlorination furnace according to claim 1, characterized in that: The height of the feeding port (3) from the furnace bottom is 6300 - 6600 mm, and the height from the middle salt discharge port (2) is 1800 - 1900 mm.

5. The large molten salt chlorination furnace according to claim 1, characterized in that: There are 3 alternating current heating electrodes (1) in total, which are evenly distributed at 120° along the inverted conical table section respectively.

6. The large molten salt chlorination furnace according to claim 1, characterized in that: An explosion-proof manhole cleaning hole (7) is arranged around the explosion-proof manhole (8).

Images