System and method for preventing sponge titanium inverted-U-shaped furnace distillation channel from being blocked

Abstract

The invention belongs to the technical field of nonferrous metallurgy, and relates to a system and method for preventing a distillation channel of a titanium sponge inverted-U-shaped furnace from being blocked. The system comprises: a reduction reactor; a condensation reactor; the distillation channel comprises a first channel section and a second channel section, the first end of the first channel section is communicated with the reduction reactor, and the first end of the second channel section is communicated with the condensation reactor; and the vacuum baffle valve is connected with the second end of the first channel section and the second end of the second channel section so as to selectively communicate the first channel section with the second channel section based on the vacuum degree of the condensation reactor. According to the system, the vacuum degree in the condensation reactor can be adjusted through the vacuum baffle valve, and meanwhile, the height of the vacuum pipe is adjusted through the lifting device, so that magnesium chloride and magnesium steam are condensed at the low position of the condenser, and an inverted-U-shaped furnace sponge titanium distillation channel is prevented from being blocked.

Description

Technical Field

[0001] The invention belongs to the technical field of nonferrous metallurgy, and relates to a system and a method for preventing a distillation channel of an inverted U-shaped titanium sponge furnace from being blocked. Background Art

[0002] At present, the furnace types for producing titanium sponge at home and abroad are mainly divided into I-type furnace and inverted U-type furnace. With the continuous expansion of single furnace production capacity, enterprises choose inverted U-type furnace for production. The shape of the inverted U-type furnace is like an inverted letter "U". This structural design can provide a specific reaction space and air flow channel for the production process of titanium sponge. In the process of producing titanium sponge, the titanium compound is reduced to metallic titanium by using a reducing agent in the inverted U-shaped furnace, and it is deposited in a sponge-like form.

[0003] After the reduction reaction, the magnesium chloride and magnesium in the titanium sponge need to be removed by vacuum distillation. However, since the impurities in the raw materials may form precipitates, moisture and volatile substances during the reaction, they will affect the smoothness of the distillation channel during the distillation process, or even block the distillation channel. Blockage of the distillation channel during the distillation process will cause a large amount of chloride residue in the titanium sponge, seriously affecting the quality of the titanium sponge product. During normal production, each furnace is blocked an average of 2 to 3 times. After the blockage occurs, the power needs to be cut off to clear the blockage. The average recovery time is about 5 to 8 hours, which not only affects the quality of the titanium sponge product but also reduces production efficiency.

[0004] Patent CN118421972A discloses a process control method for preventing the distillation channel from being blocked in the production process of titanium sponge in an inverted U-shaped furnace, comprising the following steps: during the reduction feeding process, when the feeding amount reaches 50% to 60% of the target total feeding amount, the feeding rate is reduced; when the feeding amount reaches 80% to 85% of the target amount, the end point of the reduction feeding is determined according to the pressure relief situation, and the feeding is stopped in time; during the reduction feeding process, when discharging the material, the liquid level fluctuation in the early and middle stages of the reduction is controlled at 60 to 70 cm, and the liquid level fluctuation in the late and final stages of the reduction is controlled at 30 to 40 cm; after the reduction is completed, it is assembled in sequence according to normal production, and then heated up. Among them, the heating process is carried out in five stages. This technical solution ensures that the reduction reaction is fully carried out by controlling the feeding rate and distillation temperature of the reduction reaction to prevent the channel from being blocked due to secondary reactions during the distillation process, but the process steps are cumbersome and the control cost is high.

[0005] Patent CN117568627A discloses an anti-blocking large cover and its operation method for an inverted U-shaped furnace for producing titanium sponge. The inverted U-shaped furnace reactor is provided with a hot end cover, the condenser is provided with a cold end cover, and the inner wall is fitted with a J-shaped side pipe; the cover is provided with a sealed cavity, and a large cover heater is provided in the sealed cavity; a heating device is provided on the outside of the central tube of the aisle; a sealing flange is provided at the blind end of the central tube of the cold end, and the bottom of the sealing flange is fixedly connected to the inner liner, and the inner liner has a hole larger than the inner diameter of the central tube of the aisle, and the inner liner is fitted on the inner side of the central tube of the cold end. This technical solution transforms the inverted U-shaped furnace, and reduces the condensation of volatiles at the large cover by enhancing the thermal insulation effect to avoid blocking the channel, but the structure of the inverted U-shaped furnace reactor after the transformation is complex and the equipment cost is high.

[0006] Therefore, there is an urgent need for a system and method to prevent the distillation channel of the titanium sponge inverted U-shaped furnace from being blocked. Summary of the invention

[0007] In view of this, the present invention proposes a system and method for preventing the distillation channel of a titanium sponge inverted U-shaped furnace from being blocked.

[0008] In order to solve at least one of the above technical problems, the present invention adopts the following technical solution: According to the present invention, a system for preventing blockage of a distillation channel of an inverted U-shaped sponge titanium furnace is provided, comprising: a reduction reactor; a condensation reactor; a distillation channel, comprising a first channel section and a second channel section, wherein the first end of the first channel section is connected to the reduction reactor, and the first end of the second channel section is connected to the condensation reactor; and a vacuum baffle valve, connecting the second end of the first channel section and the second end of the second channel section, so as to selectively connect the first channel section and the second channel section based on the vacuum degree of the condensation reactor.

[0009] According to one embodiment of the present invention, the reduction reactor includes: a reduction reactor cylinder, which is configured to be open at the top and defines a reaction chamber inside which a reduction reaction occurs; a reduction reactor cover, which is configured to seal and cover the top of the reduction reactor cylinder, and the first end of the channel section extends through the reduction reactor cover to the inside of the reaction chamber.

[0010] According to one embodiment of the present invention, the reduction reactor further comprises: a liquid discharge pipe connecting the bottom of the reaction chamber to an external liquid collecting device.

[0011] According to one embodiment of the present invention, the condensation reactor includes: a condensation reactor cylinder, which is configured to be open at the top and define a condensation chamber inside; a condensation reactor cover, which is configured to seal and cover the top of the condensation reactor cylinder, and the first end of the second section of the channel extends through the condensation reactor cover to the inside of the condensation chamber; a vacuum tube, which is configured to be connected to a vacuum device at the first end and extend to the inside of the condensation chamber through the condensation reactor cover at the second end; and a condensation pipe, which is arranged at the lower part of the condensation reactor cylinder, and a coolant circulates inside the condensation pipe and is configured to reduce the temperature in the condensation chamber through heat exchange.

[0012] According to an embodiment of the present invention, the coolant includes water and / or refrigerant.

[0013] According to one embodiment of the present invention, the condensation reactor further comprises: a lifting device connected to the vacuum tube and configured to drive the vacuum tube to rise or fall.

[0014] According to the present invention, a method for preventing the distillation channel of an inverted U-shaped sponge titanium furnace from being blocked is provided, comprising the following steps: adding a titanium-containing raw material and an excess of a reducing agent into a reaction chamber of a reduction reactor cylinder for a reduction reaction, wherein the reducing agent comprises metallic magnesium; after the reduction reaction is completed, raising the temperature to 820-850°C for a holding time of 2 hours to separate metallic magnesium and magnesium chloride; connecting a liquid discharge pipe to a magnesium chloride collecting device, and discharging magnesium chloride at the bottom of the reaction chamber through the liquid discharge pipe; connecting the liquid discharge pipe to a magnesium collecting device, and discharging molten metallic magnesium at the bottom of the reaction chamber through the liquid discharge pipe; and starting a vacuum pumping device for vacuum distillation, wherein the opening and closing of a vacuum baffle valve is controlled to selectively connect the first channel section and the second channel section based on the vacuum degree in the condensation reactor.

[0015] According to one embodiment of the present invention, during the vacuum distillation process, the height of the vacuum tube is controlled by a lifting device so that the second end of the vacuum tube is located 0.2-0.3 m above the liquid level of the condensate in the condensation chamber.

[0016] According to one embodiment of the present invention, the opening and closing of the vacuum baffle valve is controlled to selectively connect the channel section 1 and the channel section 2 based on the vacuum degree in the condensing reactor, including opening the vacuum baffle valve in response to the vacuum degree in the condensing reactor being lower than a first set value; and closing the vacuum baffle valve (400) in response to the vacuum degree in the condensing reactor 200 being higher than a second set value.

[0017] According to one embodiment of the present invention, the first set value is 5Pa, and the second set value is 5000Pa.

[0018] By adopting the above technical solution, the present invention has at least one of the following advantages compared with the prior art: 1. According to the system and method for preventing the distillation channel of the titanium sponge inverted U-shaped furnace from being blocked, the vacuum degree in the condensation reactor is adjusted by a vacuum baffle valve to prevent a large amount of high-temperature steam from entering the condenser and condensing under the reactor cover, thereby blocking the distillation channel; 2. According to the system and method for preventing the distillation channel of the titanium sponge inverted U-shaped furnace from being blocked, the height of the vacuum tube is adjusted by a lifting device, so that the magnesium chloride and magnesium vapor remaining in the titanium sponge pass through the distillation channel and are finally condensed at the lower position of the condenser, which will not cause the distillation channel of the titanium sponge inverted U-shaped furnace to be blocked; 3. According to the method for preventing the distillation channel of the inverted U-shaped furnace of sponge titanium from being blocked, after the reduction reaction is completed, magnesium chloride is first discharged, then molten metal magnesium is discharged, and finally distillation is performed to avoid excessive distillation load and long distillation cycle. The generated titanium particles are distilled under high temperature and vacuum conditions for a long time, which causes the titanium particles to alloy with the impurity elements contained in the reactor and affect the quality of the sponge titanium. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other embodiments can be obtained based on these drawings without paying creative work.

[0020] Figure 1 A schematic diagram of an inverted U-shaped titanium sponge furnace in the prior art is shown; Figure 2 A schematic diagram of a system for preventing blockage of a distillation channel of an inverted U-shaped titanium sponge furnace according to an embodiment of the present invention is shown.

[0021] In the accompanying drawings, 100, reduction reactor, 110, reduction reactor cylinder, 111, reaction chamber, 120, reduction reactor cover, 130, liquid discharge pipe; 200, condensation reactor, 210, condensation reactor cylinder, 211, condensation chamber, 220, condensation reactor cover, 230, vacuum tube, 240, condensation tube, 250, lifting device; 300, distillation channel, 310, channel section 1, 320, channel section 2; 400. Vacuum baffle valve. DETAILED DESCRIPTION

[0022] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the embodiments of the present invention are further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0023] It should be understood that the embodiments of the present invention shown in the exemplary embodiments are only illustrative. Although only a few embodiments are described in detail in the present invention, it is easy for those skilled in the art to appreciate that multiple modifications are feasible without actually departing from the teaching of the subject matter of the present invention. Accordingly, all such modifications should be included within the scope of the present invention. Without departing from the gist of the present invention, other replacements, modifications, changes and deletions may be made to the design, operating conditions and parameters of the following exemplary embodiments.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field of the present invention; the terms used in this specification are only for the purpose of describing specific embodiments and are not intended to limit the present invention. For example, the directions or positions indicated by the terms "length", "width", "up", "down", "left", "right", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. are based on the directions or positions shown in the drawings, which are only for the convenience of description and should not be understood as limitations on the present technical solution.

[0025] It should be noted that all expressions using "first" and "second" in the embodiments of the present invention are for distinguishing two non-identical entities with the same name or non-identical parameters. It can be seen that "first" and "second" are only for the convenience of expression and should not be understood as limitations on the embodiments of the present invention. The subsequent embodiments will not explain this one by one.

[0026] In the process of producing sponge titanium, raw materials such as titanium ore are converted into sponge titanium through specific chemical reactions in an inverted U-shaped furnace. Usually a reduction reaction is involved, in which a reducing agent is used to reduce titanium compounds to metallic titanium and deposit it in a sponge-like form. After the reduction reaction, the sponge titanium needs to be vacuum distilled to remove the magnesium chloride and magnesium in the sponge titanium. However, because the distillation temperature is at 980~1020℃ for a long time, the magnesium chloride and magnesium in the distillation reactor form steam. After the vacuum valve is opened, a large amount of high-temperature steam enters the condenser. Once the condensation intensity is low, the steam will not be completely condensed at the lower position of the condenser. It will also condense under the large cover of the reactor to form condensate, causing blockage of the distillation channel. Figure 1 shown.

[0027] like Figure 2As shown, according to one aspect of the present invention, a system for preventing the distillation channel of a sponge titanium inverted U-shaped furnace from being blocked is provided, and the system is generally composed of a reduction reactor 100, a condensation reactor 200, a distillation channel 300, and a vacuum baffle valve 400. Specifically, the distillation channel 300 includes a first channel section 310 and a second channel section 320. Among them, the first end of the first channel section 310 is connected to the reduction reactor 100, and the first end of the second channel section 320 is connected to the condensation reactor 200. The vacuum baffle valve 400 connects the second end of the first channel section 310 and the second end of the second channel section 320 to selectively connect the first channel section 310 and the second channel section 320 based on the vacuum degree in the condensation reactor 200.

[0028] The reduction reactor 100 generally includes a reduction reactor cylinder 110 and a reduction reactor cover 120. The reduction reactor cylinder 110 is the main place where the reduction reaction occurs. It is generally made of high temperature resistant and corrosion resistant materials, and has enough space inside to accommodate the reaction materials and the gases generated during the reaction. In an embodiment of the present invention, the reduction reactor cylinder 110 is set to have a top opening, and a reaction chamber 111 in which the reduction reaction occurs is defined inside. In an argon atmosphere, titanium tetrachloride and metallic magnesium undergo a reduction reaction in the reaction chamber 111 to generate sponge-like metallic titanium and magnesium chloride. The reduction reactor cover 120 is set to seal and cover the top of the reduction reactor cylinder 110, which plays the role of heat preservation, heat insulation and sealing. The first end of the channel section 310 extends through the reduction reactor cover 120 to the inside of the reaction chamber 111 to absorb the evaporated gas.

[0029] Preferably, the reduction reactor 100 also includes a liquid discharge pipe 130 of a liquid collection device connected to the bottom of the reaction chamber 111 to the outside. As the reduction reaction proceeds, titanium tetrachloride is continuously reduced to sponge-like metallic titanium, and the reducing agent metallic magnesium is gradually converted into magnesium chloride, and a portion of the generated magnesium chloride is present in liquid form at the bottom of the reaction zone. At the same time, in order to ensure that the reduction reaction is fully carried out, an excess of metallic magnesium can be added, and the unreacted metallic magnesium is molten at high temperatures. These liquid magnesium chloride and molten metallic magnesium can be discharged and collected through the liquid discharge pipe 130 for subsequent magnesium recovery and other treatments. Further preferably, the reduction reactor 100 may also include a stirring device and a temperature and pressure measuring device. The stirring device can promote the mixing of the reaction materials and the progress of the reaction by stirring, thereby improving the reaction efficiency; the temperature and pressure measuring device is used to monitor the temperature and pressure during the reaction in real time to ensure that the reaction is carried out under appropriate conditions.

[0030] The condensation reactor 200 generally includes: a condensation reactor cylinder 210, a condensation reactor cover 220, a vacuum tube 230 and a condensation tube 240. Specifically, the condensation reactor cylinder 210 is set to be open at the top and define a condensation chamber 211 inside; the condensation reactor cover 220 is set to seal and cover the top of the condensation reactor cylinder 210, and the first end of the second channel section 320 extends to the inside of the condensation chamber 211 through the condensation reactor cover 220; the vacuum tube 230 is set to be connected to the vacuum device at the first end, and the second end extends to the inside of the condensation chamber 211 through the condensation reactor cover 220; the condensation tube 240 is set at the lower part of the condensation reactor cylinder 210, and a coolant circulates inside the condensation tube 240 and is set to reduce the temperature in the condensation chamber 211 through heat exchange. Among them, the condensation tube 240 is a key component of the condensation reactor, which can be made of a material with good thermal conductivity, such as copper, stainless steel, etc., and is used to cool and condense the distilled gaseous substance into a liquid state. The condenser 240 is connected to a cooling device to provide a cooling medium, such as cooling water, refrigerant, etc., for the condenser to reduce the temperature of the condenser so that the gaseous substance can be condensed quickly.

[0031] The vacuum tube 230 is an important device for vacuum distillation. Due to the unique characteristics of the inverted "U"-shaped furnace, it is necessary to keep the position of the vacuum tube 230 nozzle at the low position of the condensation reactor 200 as much as possible during the distillation process. Under the action of the coolant outside the condenser, the magnesium chloride and magnesium vapor remaining in the sponge titanium pass through the distillation channel and finally condense at the low position of the condenser, which will not cause the blockage of the inverted "U"-shaped furnace sponge titanium distillation channel. In an embodiment of the present invention, the condensation reactor 200 also includes a lifting device 250, which is connected to the vacuum tube 230 and is configured to drive the vacuum tube 230 to rise or fall, so as to automatically adjust the length of the vacuum tube 230 in the condensation reactor cylinder 210. The lifting device 250 preferably adopts a lifting motor, such as a screw motor, an electric push rod motor, a worm gear motor, etc., which is simple to operate and easy to control.

[0032] According to another aspect of the present invention, a method for preventing the distillation channel of a titanium sponge inverted U-shaped furnace from being blocked comprises the following steps: Step S101: adding a titanium-containing raw material and an excess reducing agent into the reaction chamber 111 of the reduction reactor cylinder 110 to perform a reduction reaction, wherein the reducing agent comprises metal magnesium; Step S102: After the reduction reaction is completed, the temperature is raised to 820-850°C and the heat preservation time is 2 hours to separate the metallic magnesium and magnesium chloride; Step S103: connecting the liquid discharge pipe 130 to the magnesium chloride collecting device, and discharging the magnesium chloride at the bottom of the reaction chamber 111 through the liquid discharge pipe 130; Step S104: connecting the liquid discharge pipe 130 to the magnesium collection device, and discharging the molten metal magnesium at the bottom of the reaction chamber 111 through the liquid discharge pipe 130; Step S105 : starting the vacuum pumping device to perform vacuum distillation, wherein the vacuum baffle valve 400 is controlled to be opened and closed to selectively connect the first channel 310 and the second channel 320 based on the vacuum degree in the condensation reactor 200 .

[0033] Before loading in step S101, prepare the raw materials in advance, for example, make titanium chloride from titanium-containing raw materials such as high-titanium slag or rutile, and obtain pure titanium tetrachloride liquid after refining, and prepare reducing agents such as metal magnesium. During the loading process, put reducing agents such as metal magnesium into the reaction chamber 111 of the inverted U-shaped furnace, and do the sealing and other preparations. When the reaction starts, the refined titanium tetrachloride liquid is slowly injected into the reaction chamber 111 of the inverted U-shaped furnace through a pipeline, and titanium tetrachloride reacts with reducing agents such as metal magnesium, and the chemical equation is: TiCl4+2Mg=Ti+2MgCl2.

[0034] The reduction reaction is a violent exothermic reaction, and a large amount of heat is released during the reaction to maintain the high temperature conditions required for the reaction. In the embodiment of the present invention, the production capacity of the inverted U-shaped sponge titanium product is mainly divided into 5-ton furnace, 8-ton furnace, 10-ton furnace, 12-ton furnace and 20-ton furnace, etc., and the production capacity is set to be X in terms of mass. i , the corresponding production capacities are (X5, X8, X 10 , X 12 , and X 20 In the reduction process, magnesium is an excessive reducing agent. The amount of magnesium added is set to Yi. The amount of metal magnesium added corresponding to different production capacities is (Y5, Y8, Y 10 , Y 12 , and Y 20 ), then Y i =(1.58~1.62)*Xi.

[0035] In step S102 to step S104, after the reduction production, there is residual reducing agent magnesium in the reactor. If vacuum distillation is directly performed, it will lead to excessive distillation load and too long distillation cycle. The generated titanium particles are distilled under high temperature vacuum conditions for a long time, which will cause the titanium particles to alloy with the impurity elements contained in the reactor, seriously affecting the quality of sponge titanium. Therefore, the unreacted reducing agent magnesium is recovered after reduction. At this time, the temperature is raised to 820~850℃ and the insulation time is 2h. The purpose is to achieve a good separation effect between magnesium and magnesium chloride. First, magnesium chloride is discharged, and the discharge amount of magnesium chloride is set to A. i , then A i =(0.82~0.95)*X iAfter discharging magnesium chloride, replace the vacuum bag to discharge magnesium. The function of the vacuum bag is to prevent magnesium from burning violently when it encounters air. Set the magnesium discharge volume to B i , then B i =(1.58~1.62)*X i -1.02*X i . The discharged liquid molten magnesium can be directly added to the reduction reactor to be reduced for thermal reduction reaction of sponge titanium magnesium. The general process is to directly vacuum distill the liquid magnesium after the reduction is completed, and the magnesium vapor is condensed into a solid in the condensation reactor. The next step of reduction requires continued power supply to heat the molten magnesium, and the power consumption increases by an average of 500~800kWh, which greatly increases the production cost. After the magnesium is discharged, vacuum distillation begins.

[0036] By utilizing the fact that magnesium and magnesium chloride have a certain vapor pressure at high temperature, and their vapor pressure is greatly different from the vapor pressure of titanium sponge, magnesium and magnesium chloride are separated from titanium sponge in gaseous form by controlling the temperature and pressure conditions in the furnace. During the vacuum distillation process of step S105, the height of the vacuum tube 230 is controlled by the lifting device 250 so that the second end of the vacuum tube 230 is located 0.2~0.3m above the condensate liquid surface in the condensation chamber 211. On the one hand, the position of the vacuum tube 230 is kept at a low position of the condensation reactor as much as possible, which not only makes the vacuum more sufficient, but also facilitates the condensation of magnesium chloride and magnesium vapor as soon as possible; on the other hand, the vacuum tube 230 is kept at a certain distance above the condensate liquid surface to prevent the condensate from being inhaled.

[0037] In an embodiment of the present invention, the entire distillation process needs to control the opening and closing of the vacuum baffle valve 400 to selectively connect the first channel 310 and the second channel 320 based on the vacuum degree in the condensation reactor 200. Specifically, the vacuum baffle valve 400 can open the vacuum baffle valve 400 in response to the vacuum degree in the condensation reactor 200 being lower than the first set value; and close the vacuum baffle valve 400 in response to the vacuum degree in the condensation reactor 200 being higher than the second set value. The vacuum degree in the reactor during the vacuum distillation process is an important basis for judging the blockage of the channel. Because the distillation temperature is at 980~1020℃ for a long time, the magnesium chloride and magnesium in the distillation reactor form steam at this time. After the vacuum valve is opened, a large amount of high-temperature steam enters the condenser. Once the condensation intensity is low, the steam cannot be completely condensed at the low position of the condenser, and it will also condense under the large cover of the reactor to form condensate, causing the blockage of the distillation channel. The present invention adopts a vacuum baffle valve to adjust the vacuum degree in the condenser. When the vacuum degree in the condenser is ≥5000Pa, the vacuum regulating valve is closed, and the vacuum distillation system continues to evacuate the steam in the condenser, and the steam will condense at the low position of the condenser. When the vacuum degree in the condenser is ≤5Pa, the vacuum regulating valve is opened to ensure that the magnesium chloride and magnesium vapor in the distillation reactor enter the condenser, and the vacuum distillation system continues to evacuate the steam in the condenser. After the above repeated operations, the vacuum distillation process finally has a vacuum degree of ≤1Pa in the distillation reactor and a vacuum degree of ≤0.1Pa in the condensation reactor, and the vacuum distillation is completed.

[0038] The technical features of the above embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0039] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.

Claims

1. A system for preventing the blockage of the distillation channel of a titanium sponge inverted U-shaped furnace, characterized in that: include: Reduction reactor (100); Condensation reactor (200); a distillation channel (300), comprising a first channel section (310) and a second channel section (320), wherein a first end of the first channel section (310) is connected to the reduction reactor (100), and a first end of the second channel section (320) is connected to the condensation reactor (200); and A vacuum baffle valve (400) connects the second end of the first channel section (310) and the second end of the second channel section (320) to selectively connect the first channel section (310) and the second channel section (320) based on the vacuum degree in the condensation reactor (200).

2. The system according to claim 1, characterized in that The reduction reactor (100) comprises: The reduction reactor cylinder (110) is arranged to be open at the top and defines a reaction chamber (111) inside which a reduction reaction occurs; The reduction reactor cover (120) is configured to seal and cover the top of the reduction reactor cylinder (110), and the first end of the first channel section (310) extends through the reduction reactor cover (120) to the interior of the reaction chamber (111).

3. The system according to claim 2, characterized in that The reduction reactor (100) further comprises: A liquid discharge pipe (130) is connected from the bottom of the reaction chamber (111) to an external liquid collection device.

4. The system according to claim 1, characterized in that The condensation reactor (200) comprises: The condensation reactor cylinder (210) is arranged to be open at the top and defines a condensation chamber (211) therein; A condensing reactor cover (220) is configured to seal and cover the top of the condensing reactor cylinder (210), and a first end of the second channel section (320) extends through the condensing reactor cover (220) to the interior of the condensing chamber (211); A vacuum tube (230) is configured such that a first end is connected to a vacuum device, and a second end passes through the condensation reactor cover (220) and extends to the interior of the condensation chamber (211); and The condenser tube (240) is arranged at the lower part of the condensation reactor cylinder (210), and a coolant circulates inside the condenser tube (240) and is arranged to reduce the temperature inside the condensation chamber (211) through heat exchange.

5. The system according to claim 4, characterized in that The coolant includes water and / or refrigerant.

6. The system according to claim 4, characterized in that The condensation reactor (200) further comprises: A lifting device (250) is connected to the vacuum tube (230) and is configured to drive the vacuum tube (230) to rise or fall.

7. A method for preventing the blockage of the distillation channel of the titanium sponge inverted U-shaped furnace, characterized in that: The following steps are involved: Adding a titanium-containing raw material and an excess amount of a reducing agent into a reaction chamber (111) of a reduction reactor cylinder (110) to perform a reduction reaction, wherein the reducing agent comprises metal magnesium; After the reduction reaction is completed, the temperature is raised to 820-850°C and kept at this temperature for 2 hours to separate the metallic magnesium and magnesium chloride; Connecting the liquid discharge pipe (130) to the magnesium chloride collection device, and discharging the magnesium chloride at the bottom of the reaction chamber (111) through the liquid discharge pipe (130); The liquid discharge pipe (130) is connected to a magnesium collection device, and the molten metal magnesium at the bottom of the reaction chamber (111) is discharged through the liquid discharge pipe (130); The vacuum extraction device is started to perform vacuum distillation, wherein the opening and closing of the vacuum baffle valve (400) is controlled to selectively connect the first channel (310) and the second channel (320) based on the vacuum degree in the condensation reactor (200).

8. The method according to claim 7, characterized in that During the vacuum distillation process, the height of the vacuum tube (230) is controlled by the lifting device (250) so that the second end of the vacuum tube (230) is located 0.2-0.3 m above the liquid surface of the condensate in the condensation chamber (211).

9. The method according to claim 7, characterized in that: Controlling the opening and closing of the vacuum baffle valve (400) to selectively connect the first channel section (310) and the second channel section (320) based on the vacuum degree in the condensation reactor (200), comprising: In response to the vacuum degree in the condensation reactor (200) being lower than a first set value, opening the vacuum damper valve (400); In response to the vacuum degree in the condensation reactor (200) being higher than a second set value, the vacuum damper valve (400) is closed.

10. The method according to claim 9, characterized in that The first set value is 5Pa, and the second set value is 5000Pa.

Images