U-shaped furnace for producing titanium sponge and discharging device and discharging method of U-shaped furnace
By using a U-shaped furnace discharge device with heating and inert gas in the sponge titanium production process, the problem of pipeline blockage caused by MgCl2 solidification was solved, ensuring the safety and continuity of sponge titanium production.
Patent Information
- Application Number
- CN202511076535.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-01
- Publication Date
- 2025-10-14
AI Technical Summary
In the existing titanium sponge production process, residual Mg in MgCl2 poses a safety risk and solidifies in the guide tube, causing pipeline blockage and affecting the smooth progress of the reduction process.
A U-shaped furnace discharge device is used, including a draft tube, a transverse connecting tube, and a longitudinal connecting tube. A heating component is used to maintain the temperature of the transverse connecting tube at 720°C to 800°C. Inert gas is filled into the draft tube to prevent MgCl2 from solidifying, control the discharge pressure and rate, and ensure the separation and transportation of reaction products.
It effectively avoids the solidification of MgCl2 in the draft tube, reduces the risk of pipeline blockage, ensures the smooth progress of the reduction process, and reduces safety hazards.
Smart Images
Figure CN120777889A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application belongs to the technical field of titanium sponge production, and particularly relates to a U-shaped furnace for producing titanium sponge and a discharging device and method thereof. BACKGROUND
[0002] In the production of titanium sponge, either of the two modes of upper and lower discharging of MgCl2 can be adopted, and the method of magnesium hot reduction of titanium tetrachloride is generally adopted. According to the different furnace types used in production, there are I-shaped furnaces and U-shaped reactors, and for the U-shaped reactors, the generated MgCl2 in the reactor is generally discharged in the upper discharging mode. For the whole-process titanium sponge production, the MgCl2 generated in the reduction process needs to be discharged into a ladle and transported to a magnesium electrolysis cell by a ladle trolley.
[0003] There is an automatic discharging system for titanium sponge production in the prior art, wherein the MgCl2 discharging device comprises a reactor and a MgCl2 ladle trolley, a MgCl2 ladle is installed on the top of the MgCl2 ladle trolley, a discharging pipe is connected to one side of the bottom of the reactor, the outer end of the discharging pipe is first extended upward and then bent to one side and connected with an extension pipe, a feeding pipe is arranged on the top of the MgCl2 ladle, and the extension pipe can be deeply inserted into the feeding pipe. In the automatic discharging system for titanium sponge production, the pressurizing pipe can ensure automatic control of discharging, the discharging amount can be detected by a pressure sensor, the discharging speed and total amount can be more accurately controlled and recorded, the causes of abnormal problems can be easily found, the manual operation error is reduced, the operator can pay more attention to abnormal problems in the discharging process, the safety risk is reduced, and the height of the MgCl2 ladle can be adjusted on site, so that the operator can easily perform the installation and dismounting work of the MgCl2 extension pipe.
[0004] However, the above system has the following disadvantages: Mg is left in MgCl2, and after the Mg is discharged, there is a great safety risk, and in the process of discharging MgCl2, MgCl2 can be solidified in the flow guide pipe, MgCl2 left in the flow guide pipe can cause pipe blockage, MgCl2 cannot be smoothly discharged, and the reduction process is affected. SUMMARY
[0005] To solve the above problems, the present application provides a U-shaped furnace for producing titanium sponge and a discharging device and method thereof, which can avoid Mg left in MgCl2, avoid the safety risk caused by the discharge of Mg, and in the process of discharging MgCl2, avoid the solidification of MgCl2 in the flow guide pipe, avoid MgCl2 left in the flow guide pipe, effectively avoid pipe blockage, and ensure the smooth progress of the reduction process.
[0006] The application provides a discharge device of a U-shaped furnace for producing titanium sponge, which comprises a flow guide pipe connected with a lifting pipe, a transverse connecting pipe and a longitudinal connecting pipe in sequence.
[0007] The first end of the lifting pipe is located at the bottom of the inner cavity of the reactor of the U-shaped furnace, and the second end is connected to the first end of the transverse connecting pipe.
[0008] The transverse connecting pipe is located outside the U-shaped furnace, and the second end is connected to the first end of the longitudinal connecting pipe, and the circumferential direction of the transverse connecting pipe is provided with a first heating component for heating to 720-800 DEG C.
[0009] The second end of the longitudinal connecting pipe is used for connecting to the vertical pipe insertion port of the ladle.
[0010] Preferably, in the discharge device of the U-shaped furnace for producing titanium sponge, the lifting pipe and the transverse connecting pipe are connected by a first flange and a second flange, the first flange is arranged at the second end of the lifting pipe, the second flange is arranged at the first end of the transverse connecting pipe, and the transverse connecting pipe and the longitudinal connecting pipe are connected by a third flange and a fourth flange, the third flange is arranged at the second end of the transverse connecting pipe, and the fourth flange is arranged at the first end of the longitudinal connecting pipe.
[0011] Preferably, in the discharge device of the U-shaped furnace for producing titanium sponge, the first flange is provided with a first inert gas inlet, and the second flange is provided with a second inert gas inlet.
[0012] Preferably, in the discharge device of the U-shaped furnace for producing titanium sponge, the transverse connecting pipe has a preset inclination angle with the horizontal plane, and gradually inclines downward along the direction away from the U-shaped furnace.
[0013] Preferably, in the discharge device of the U-shaped furnace for producing titanium sponge, the preset inclination angle is 5-15 DEG.
[0014] The application provides a U-shaped furnace for producing titanium sponge, which comprises a reactor, a discharge device and a ladle, wherein the discharge device is connected between the reactor and the ladle, and is used for discharging reaction products in the reactor into the ladle, the discharge device is the discharge device as any one of the above, the inner cavity of the reactor comprises a reaction zone at the upper part and a reaction product settling and storage zone at the lower part, and the top of the reactor is provided with a third inert gas inlet.
[0015] Preferably, in the U-shaped furnace for producing titanium sponge as above, the reaction product settling storage area has a movable bottom, and the top of the movable bottom is supported by a grid with a plurality of through holes distributed on the surface, the grid is used to separate the reaction area and the reaction product settling storage area, and the outer periphery of the grid is not in contact with the inner wall of the magnesium chloride settling storage area.
[0016] Preferably, in the U-shaped furnace for producing titanium sponge as above, the ladle is a fully sealed structure, the outer layer of the inner liner of the ladle is thermal insulation cotton, the outermost side is a steel shell, and the bottom of the inner liner of the ladle is provided with a heating resistance wire.
[0017] Preferably, in the U-shaped furnace for producing titanium sponge as above, the top of the ladle is provided with a fourth inert gas inlet.
[0018] The application provides a discharging method of a U-shaped furnace for producing titanium sponge, which utilizes the U-shaped furnace for producing titanium sponge as any one of the above, comprising:
[0019] The wall temperature of the reaction area in the reactor is set to 740-850℃, the temperature of the reaction product settling storage area in the reactor is set to 780-820℃, and the temperature of the ladle is set to 715-800℃;
[0020] During the magnesium melting and heating process, the pressure at the first end of the lifting pipe is controlled to be 28-30kPa, and the pressure in the upper space of the reactor is controlled to be 5-25kPa; during the titanium tetrachloride feeding process, the pressure at the first end of the lifting pipe is controlled to be 28-30kPa, and the pressure in the upper space of the reactor is controlled to be 5-25kPa;
[0021] During the magnesium chloride discharging process, the pressure in the reactor is released to 2-5kPa, the lifting pipe is connected with the transverse connecting pipe, and the temperature of the transverse connecting pipe is raised to 720-800℃ by the first heating component;
[0022] The vertical pipe insertion port of the ladle is connected with the longitudinal connecting pipe, the upper pressure of the reactor is controlled to be 30-50kPa, the discharging rate of the magnesium chloride is controlled to be 200-400kg / min, and the discharging amount of the magnesium chloride is controlled to be less than the cumulative amount of the magnesium chloride in the reaction product settling storage area;
[0023] After the discharge is finished, the pressure of the upper space of the reactor is discharged to 2-5 kPa, the connection of the discharge pipe and the transverse connecting pipe is disconnected, the transverse connecting pipe is filled with inert gas, the pressure is controlled at 30-50 kPa, the discharge pipe is filled with inert gas, the pressure is controlled at 28-30 kPa, and the ladle is filled with inert gas, the pressure is controlled at 2-5 kPa.
[0024] As can be seen from the above description, the discharge device for the U-shaped furnace for producing titanium sponge provided by the application has the first end of the discharge pipe located at the bottom of the inner cavity of the reactor of the U-shaped furnace and the second end connected to the first end of the transverse connecting pipe; the transverse connecting pipe is located outside the U-shaped furnace and has the second end connected to the first end of the longitudinal connecting pipe, and the transverse connecting pipe has a first heating component for heating to 720-800 ℃ in the circumferential direction; the second end of the longitudinal connecting pipe is used for connecting to the vertical pipe insertion port of the ladle, so that in the process of discharging MgCl2, the solidification of MgCl2 in the flow guide pipe can be avoided, MgCl2 remaining in the flow guide pipe can be avoided, and pipeline blockage can be effectively avoided, so that the reduction process can be ensured to proceed smoothly; in addition, the U-shaped furnace for producing titanium sponge provided by the application comprises the discharge device and the inner cavity of the reactor, which comprises a reaction zone located at the upper part and a reaction product settling and storage zone located at the lower part, so that the reaction product can be separated from the reaction zone and located in the reaction product settling and storage zone at the lower part, so that Mg remaining in MgCl2 can be avoided, and the safety risk caused by the discharge of Mg can be avoided; in addition, the discharge method for the U-shaped furnace for producing titanium sponge provided by the application can effectively control the discharge rate and the discharge amount by controlling the pressure, so that the discharge of Mg can be better avoided, and the purpose of preventing the reaction product from remaining can be achieved by filling the inert gas after the discharge. BRIEF DESCRIPTION OF DRAWINGS
[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the provided drawings.
[0026] Figure 1 FIG. 1 is a schematic diagram of an embodiment of the discharge device for the U-shaped furnace for producing titanium sponge provided by the present application;
[0027] Figure 2 FIG. 4 is a top view of the grid;
[0028] Figure 3 FIG. 5 is a schematic diagram of an embodiment of the discharge method for the U-shaped furnace for producing titanium sponge provided by the present application. DETAILED DESCRIPTION
[0029] The core of the present application is to provide a U-shaped furnace for producing titanium sponge and a discharging device and a discharging method thereof, which can avoid the residual Mg in MgCl2 and the safety risk caused by the discharge of Mg, and can avoid the solidification of MgCl2 in the flow guide pipe and the residual MgCl2 in the flow guide pipe during the discharge of MgCl2, effectively avoid the pipe blockage, and ensure the smooth progress of the reduction process.
[0030] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.
[0031] The present application provides an embodiment of a discharging device of a U-shaped furnace for producing titanium sponge, as shown in the drawings, Figure 1 Figure 1 The present application provides an embodiment of a discharging device of a U-shaped furnace for producing titanium sponge, as shown in the drawings,
[0032] The first end 11 of the lifting pipe 1 is located at the bottom of the inner cavity of the reactor 4 of the U-shaped furnace, specifically, it extends into the magnesium chloride product, in order to ensure that as much magnesium chloride product as possible is discharged, the second end 12 of the lifting pipe 1 is connected to the first end 21 of the transverse connecting pipe 2, and the second end 12 of the lifting pipe 1 is located outside the reactor 4, achieving the purpose of discharging the magnesium chloride product;
[0033] The transverse connecting pipe 2 is located outside the U-shaped furnace, and the second end 22 is connected to the first end 31 of the longitudinal connecting pipe 3. The transverse connecting pipe 2 serves as a transition, allowing the magnesium chloride product to flow downward after a certain distance. The transverse connecting pipe 2 has a first heating component 23 around the circumference for heating to 720-800℃. The first heating component 23 can include, but is not limited to, heating resistance wires and heat preservation components. The first heating component 23 can heat the residual magnesium chloride before discharging, keeping it in a molten state, thereby avoiding solidification and pipe blockage, which can better ensure the smoothness of the discharge and avoid additional work to clear the pipe.
[0034] The second end 32 of the longitudinal connecting pipe 3 is used for connecting to the vertical pipe insertion port 51 of the ladle 5, and after the second end 32 of the longitudinal connecting pipe 3 is inserted into the vertical pipe insertion port 51, the magnesium chloride product can be quickly transported into the ladle 5 by gravity, so that the reactor 4 realizes the discharge of the magnesium chloride product into the ladle 5.
[0035] It can be seen that in the above case, the magnesium chloride at the bottom of the reactor 4 of the U-shaped furnace can be sequentially transported into the ladle 5 through the lifting pipe 1, the transverse connecting pipe 2 and the longitudinal connecting pipe 3. Since the transverse connecting pipe 2 can be heated, it can be ensured that in the scheme of discharging the magnesium chloride upward, the magnesium chloride will not be solidified in the entire flow guide pipe, so that the transportation process can be smoothly carried out.
[0036] As can be seen from the above description, in the embodiment of the discharge device for the U-shaped furnace for producing titanium sponge provided by the application, the first end of the lifting pipe is located at the bottom of the reactor cavity of the U-shaped furnace, and the second end is connected to the first end of the transverse connecting pipe. The transverse connecting pipe is located outside the U-shaped furnace, and the second end is connected to the first end of the longitudinal connecting pipe. The transverse connecting pipe has a first heating component for heating to 720-800°C around the transverse connecting pipe. The second end of the longitudinal connecting pipe is used for connecting to the vertical pipe insertion port of the ladle, so that in the process of discharging the MgCl2, the MgCl2 can be prevented from being solidified in the flow guide pipe. The MgCl2 remaining in the flow guide pipe is avoided, the pipeline blockage is effectively avoided, and the smooth progress of the reduction process is ensured.
[0037] In one specific embodiment of the discharge device for the U-shaped furnace for producing titanium sponge, the lifting pipe 1 and the transverse connecting pipe 2 are connected by using a first flange and a second flange. The first flange is arranged at the second end 12 of the lifting pipe 1, and the second flange is arranged at the first end 21 of the transverse connecting pipe 2. The transverse connecting pipe 2 and the longitudinal connecting pipe 3 are connected by using a third flange and a fourth flange. The third flange is arranged at the second end 22 of the transverse connecting pipe 2, and the fourth flange is arranged at the first end 31 of the longitudinal connecting pipe 3. The flange connection mode can ensure better sealing and no leakage. Of course, other connection modes can also be selected according to actual needs, which are not limited here.
[0038] In another specific embodiment of the discharge device of the U-shaped furnace for producing titanium sponge, based on the above specific embodiment, the first flange can be provided with a first inert gas inlet, so that inert gas such as argon can be filled into the reactor from the first inert gas inlet to discharge the air inside and provide an inert gas environment for the reaction process to avoid the oxidation of Mg into MgO, and the second flange can be provided with a second inert gas inlet, so that the inert gas can be blown into the horizontal connecting pipe to avoid the problem of residual magnesium chloride and avoid the blockage of the pipe, so that the entire discharge process is more smooth and avoids the additional workload caused by maintenance.
[0039] In another specific embodiment of the discharge device of the U-shaped furnace for producing titanium sponge, the horizontal connecting pipe 2 has a preset inclination angle with the horizontal plane and gradually inclines downward along the direction away from the U-shaped furnace, that is, the magnesium chloride can flow more smoothly under the action of one component of gravity, and further, the preset inclination angle can be preferably 5° to 15°, in which case, after the inert gas is filled into the first inert gas inlet after discharge, the residual magnesium chloride can be more easily discharged to prevent the material from being left in the pipe to block the pipe, and this inclined design is beneficial to the flow of the magnesium chloride product solution, and of course, the inclination angle can be adjusted according to actual needs, which is not limited here.
[0040] An embodiment of the U-shaped furnace for producing titanium sponge provided by the present application is still shown as Figure 1 The U-shaped furnace can include a reactor 4, a discharge device, and a ladle 5, the reactor 4 is used for reacting magnesium with titanium tetrachloride, wherein the discharge device is connected between the reactor 4 and the ladle 5 and is used for discharging the reaction product in the reactor 4 into the ladle 5, the discharge device can be preferably any of the discharge devices as described above, the inner cavity of the reactor 4 includes a reaction zone 41 located at the upper part and a reaction product settling and storage zone 42 located at the lower part, the reaction product settling and storage zone 42 can be spherical, the storage amount of magnesium chloride therein can be 1500 kg to 2000 kg, and further can be preferably 2000 kg, at this time, the end of the discharge device is ensured to extend into the reaction product settling and storage zone 42, and the top of the reactor 4 can be provided with a third inert gas inlet 43, so that inert gas can be filled into the reactor, which has the effect of discharging air and can also be used to pressurize the inner cavity of the reactor 4 to realize discharge and other operations.
[0041] Since the U-shaped furnace for producing titanium sponge as described above comprises the discharge device as described above, the inner cavity of the reactor 4 comprises a reaction zone 41 at the upper portion and a reaction product settling and storage zone 42 at the lower portion, so that the reaction product can be separated from the reaction zone and be located in the reaction product settling and storage zone 42 at the lower portion alone, thereby being able to better avoid the MgCl2residual Mg, since even if there is a small amount of Mg, the Mg is located at the upper portion of the MgCl2, and the discharge is started from the lower portion, so that by controlling the discharge amount, only the MgCl2can be discharged, and the Mg at the upper portion can still remain in the inner cavity of the reactor 4, so that this scheme can effectively avoid the safety risk caused by the Mg being discharged.
[0042] With reference to the foregoing Figure 1 , and in combination with Figure 2 , Figure 2In the above-mentioned embodiment of the U-shaped furnace for producing titanium sponge, the reaction product settling storage area 42 has a movable bottom 44, and the top of the movable bottom 44 is supported by a grid 45 having a plurality of through holes 46 distributed on the surface of the grid 45. The grid 45 is used to separate the reaction area 41 and the reaction product settling storage area 42, and the outer periphery of the grid 45 does not contact the inner wall of the magnesium chloride settling storage area 42. Thus, the reaction product magnesium chloride can enter the reaction product settling storage area 42 through the through holes 46 and the gaps between the grid and the inner wall of the magnesium chloride settling storage area. In one embodiment, the height ratio of the reaction product settling storage area 42 to the reaction area 41 can be 9:1 to 12:1, the diameter of the reactor 4 can be 1.8m to 2.2m, and can be preferably 2.2m, the height of the reaction product settling storage area 42 can be 0.04m to 0.06m, and can be preferably 0.06m, the diameter of the grid 45 can be 1cm to 6cm smaller than the diameter of the inner wall of the magnesium chloride settling storage area 42, and can be preferably 3cm, the diameter of the through holes 46 distributed on the grid 45 can be 2cm to 4cm, and can be preferably 2cm, and the diameter of the grid 45 can be 1.5m to 2.0m, and can be preferably 1.5m. In this embodiment, the reaction area 41 of the reactor is isolated from the reaction product settling storage area 42, the reaction area 41 contains a mixed melt of Mg and MgCl2, and the reaction product settling storage area 42 contains MgCl2. The amount of MgCl2 discharged in a single batch is less than the storage amount of MgCl2 in the reaction product settling storage area 42. Since the Mg is located above the MgCl2, and the MgCl2 is discharged from the lower part of the reaction product settling storage area 42 by the guide pipe, the Mg located above is not discharged, the loss of Mg is reduced, and the magnesium electrolysis cell is not disturbed. Otherwise, if the Mg is oxidized to form MgO, the current efficiency of the electrolysis cell will decrease when the MgO is added to the electrolysis cell.
[0043] In another embodiment of the U-shaped furnace for producing titanium sponge, the ladle 5 can be a fully sealed structure. The outer layer of the inner liner of the ladle 5 can be preferably thermal insulation cotton, and the outermost side can be a steel shell. The bottom of the inner liner of the ladle 5 is provided with heating resistance wires (white hole parts), so that the bottom of the ladle 5 can be heated, and solidification does not occur during the transfer of the magnesium chloride, ensuring the smooth progress of the transfer process.
[0044] In the above-mentioned U-shaped furnace for producing titanium sponge, the top of the ladle 5 can be provided with a fourth inert gas inlet 51, so that the inert gas, which can be but is not limited to argon, can be filled into the ladle 5 through the fourth inert gas inlet 51, so as to ensure that even if a small amount of Mg enters the ladle, the magnesium chloride solution will not absorb oxygen, and Mg will not react with oxygen, so that there is no magnesium oxide impurity in the discharged solution, which will not introduce magnesium oxide impurity to the subsequent production system, and thus the oxygen content of the titanium sponge can be effectively guaranteed.
[0045] In the production process of titanium sponge, the following requirements are generally required for the discharge of magnesium chloride: (1) a certain amount of MgCl2 should be discharged according to the process requirements, and Mg should not be left in MgCl2. Generally, the content of Mg should be controlled to ≤1%; (2) the discharge speed of MgCl2 should be adjustable, so as to avoid large deviation between the actual discharge amount and the theoretical discharge amount, or safety risk due to Mg being discharged; (3) during the discharge of MgCl2, it is necessary to ensure that MgCl2 does not solidify in the flow guide pipe, and MgCl2 is not left in the flow guide pipe, so as to avoid pipe blockage and affect the progress of the reduction process; (4) the service temperature of the MgCl2 ladle should always be higher than the melting point of MgCl2, so as to avoid solidification of MgCl2 during the transfer process.
[0046] Based on the above various needs, the present application provides an embodiment of a discharge method for a U-shaped furnace for producing titanium sponge, which can be used in the U-shaped furnace for producing titanium sponge as claimed in any one of the above, and can include the following steps: Figure 3 Figure 3 The present application provides a schematic diagram of an embodiment of a discharge method for a U-shaped furnace for producing titanium sponge, which can be used in the U-shaped furnace for producing titanium sponge as claimed in any one of the above, and can include the following steps:
[0047] S1: setting the wall temperature of the reaction zone in the reactor to 740-850℃, setting the temperature of the reaction product settling and storage zone in the reactor to 780-820℃, and setting the temperature of the ladle to 715-800℃;
[0048] It should be noted that before this step, the assembly process can be carried out, during the use of the reactor as a condenser, the movable bottom and the grid are welded to the bottom of the reactor, after the magnesium in the reactor is added and the temperature is raised to 800°C, the horizontal connecting pipe is connected with the vertical connecting pipe. Then the temperature control in the longitudinal direction of the reactor is carried out, the temperature of the reactor wall in the reaction zone in the reactor is preferably set to 770°C, which is a better reaction temperature, and the temperature of the reaction product settling and storage zone is preferably set to 800°C, so as to ensure that the reaction product will not solidify, and the temperature of the ladle during use is preferably 720°C, to ensure that the reaction product flowing into the ladle will not solidify. It can be seen that different temperatures are set in different areas of the reactor in the longitudinal direction. The upper reaction zone is used for heat dissipation, and the lower reaction product storage zone is used for heat preservation to store the magnesium chloride melt.
[0049] S2: During the melting and temperature rising of magnesium, the pressure at the first end of the material lifting pipe is controlled to be 28-30 kPa, and the pressure in the upper space of the reactor is controlled to be 5-25 kPa. During the addition of titanium tetrachloride, the pressure at the first end of the material lifting pipe is controlled to be 28-30 kPa, and the pressure in the upper space of the reactor is controlled to be 5-25 kPa.
[0050] It should be noted that during the melting of magnesium and the addition process, the pressure at the first end of the material lifting pipe is higher than the pressure in the upper space of the reactor, so the solution will not enter the pipe, so as to avoid plugging the pipe flange.
[0051] S3: During the discharge of magnesium chloride, the pressure in the reactor is released to 2-5 kPa, the flange of the material lifting pipe is removed, the material lifting pipe is connected with the horizontal connecting pipe, and the temperature of the horizontal connecting pipe is raised to 720-800°C by using the first heating component.
[0052] It should be noted that before connecting the horizontal connecting pipe and the material lifting pipe, it is ensured that there is no high pressure any more, and after connection, conduction is realized between the two, and the temperature of the horizontal connecting pipe is raised to ensure that the reaction product will not solidify and plug the pipeline during the subsequent discharge process.
[0053] S4: The vertical pipe of the ladle is connected with the vertical connecting pipe, the upper pressure of the reactor is controlled to be 30-50 kPa, the discharge rate of magnesium chloride is controlled to be 200-400 kg / min, and the discharge amount of magnesium chloride is controlled to be less than the cumulative amount of magnesium chloride in the reaction product settling and storage zone.
[0054] It can be seen that after connection, an effective discharge path between the reactor and the ladle is formed, and then the increase of the upper pressure of the reactor can press the reaction product magnesium chloride in the reactor into the first end of the material lifting pipe, and then through the entire flow guide pipe, and finally into the ladle, realizing rapid and effective discharge.
[0055] S5: After the end of the discharge, the pressure of the upper space of the reactor is released to 2-5 kPa, the connection of the discharge pipe and the transverse connecting pipe is disconnected, the transverse connecting pipe is filled with inert gas, the pressure is controlled at 30-50 kPa, the discharge pipe is filled with inert gas, the pressure is controlled at 28-30 kPa, and the ladle is filled with inert gas, and the pressure is controlled at 2-5 kPa.
[0056] It should be noted that, after the end of the discharge, the transverse connecting pipe is backblown, so that the solution in the pipe is discharged, and the discharge pipe is filled with inert gas to discharge the air in the reactor, and the ladle is filled with inert gas to discharge the air in the ladle. It can be seen that in this way, not only the residual material can be prevented from affecting the normal production, but also the air can be discharged to avoid the reaction of oxygen in the air with magnesium.
[0057] From the above description, it can be seen that the above-mentioned discharge method of the U-shaped furnace for producing titanium sponge provided by the application can effectively control the discharge rate and the discharge amount by controlling the pressure, so as to better avoid the discharge of magnesium, and the purpose of preventing the residual reaction product is achieved by filling the inert gas after the discharge.
[0058] The transfer process of the material in the ladle is as follows:
[0059] The ladle can be flushed with 750-850℃ MgCl2, and the flushing time is ≥30 min; the bottom of the ladle is heated during the transfer process of MgCl2, and the temperature is controlled at 670-700℃; during the process of transferring MgCl2 in the ladle from the reduction distillation furnace to the electrolytic cell, the pressure of the ladle is controlled at 2-5 kPa, and the ladle can be filled with argon protection to prevent the combustion of Mg in the ladle to produce MgO. Before use, the ladle can be filled with 500-1000 kg of NaCl, 500-1000 kg of CaCl2, and the rest of the space is used to fill MgCl2. It should be noted that, by pre-adding NaCl and CaCl2 into the ladle, the melting point of the filled molten salt can be reduced, so that the transfer temperature of the melt is the same as the temperature of the electrolytic cell, which prevents the over-heated melt from being added into the electrolytic cell to cause the temperature of the electrolytic cell to rise, and reduces the risk of solidification of the melt. The specification of the ladle can be: each ladle can be filled with 2000-3000 kg of MgCl2.
[0060] The foregoing description of the disclosed embodiments enables a person skilled in the art to make or use the application. Modifications of these embodiments will occur to persons of skill in the art, and that the appended claims are intended to cover all such modifications that do not depart from the true spirit and scope of the application. Therefore, the application is not limited to the embodiments shown but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A discharge device for a U-shaped furnace for producing titanium sponge, characterized in that: It includes a flow guide pipe, which includes a material raising pipe, a horizontal connecting pipe and a longitudinal connecting pipe connected in sequence; The first end of the material raising pipe is located at the bottom of the reactor cavity of the U-shaped furnace, and the second end is connected to the first end of the horizontal connecting pipe; The transverse connecting pipe is located outside the U-shaped furnace, and the second end thereof is connected to the first end of the longitudinal connecting pipe. The circumference of the transverse connecting pipe is provided with a first heating component for heating to 720° C. to 800° C.; The second end of the longitudinal connecting pipe is used to be connected to the vertical pipe insertion port of the lifting bag.
2. The discharge device of the U-shaped furnace for producing titanium sponge according to claim 1, characterized in that: The material raising pipe and the transverse connecting pipe are connected by a first flange and a second flange, the first flange is arranged at the second end of the material raising pipe, and the second flange is arranged at the first end of the transverse connecting pipe, and the transverse connecting pipe and the longitudinal connecting pipe are connected by a third flange and a fourth flange, the third flange is arranged at the second end of the transverse connecting pipe, and the fourth flange is arranged at the first end of the longitudinal connecting pipe.
3. The discharge device of the U-shaped furnace for producing titanium sponge according to claim 2, characterized in that: The first flange is provided with a first inert gas charging port, and the second flange is provided with a second inert gas charging port.
4. The discharge device of the U-shaped furnace for producing titanium sponge according to claim 1, characterized in that: The transverse connecting pipe has a preset inclination angle with the horizontal plane and gradually inclines downward in a direction away from the U-shaped furnace.
5. The discharge device of the U-shaped furnace for producing titanium sponge according to claim 4, characterized in that: The preset tilt angle is 5° to 15°.
6. A U-shaped furnace for producing titanium sponge, characterized in that: The invention comprises a reactor, a discharge device and a ladle, wherein the discharge device is connected between the reactor and the ladle and is used to discharge the reaction product in the reactor into the ladle. The discharge device is the discharge device according to any one of claims 1 to 5. The inner cavity of the reactor comprises a reaction zone located at the upper part and a reaction product sedimentation storage area located at the lower part. A third inert gas filling port is provided at the top of the reactor.
7. The U-shaped furnace for producing titanium sponge according to claim 6, characterized in that: The reaction product sedimentation storage area has a movable bottom, and the top of the movable bottom supports a grid with multiple through holes distributed on the surface. The grid is used to separate the reaction area and the reaction product sedimentation storage area, and the outer periphery of the grid does not contact the inner wall of the magnesium chloride sedimentation storage area.
8. The U-shaped furnace for producing titanium sponge according to claim 6, characterized in that: The lifting bag is a fully sealed structure. The outer layer of the inner liner of the lifting bag is thermal insulation cotton, the outermost layer is a steel shell, and a heating resistance wire is provided at the bottom of the inner liner of the lifting bag.
9. The U-shaped furnace for producing titanium sponge according to claim 6, characterized in that: A fourth inert gas filling port is provided on the top of the ladle.
10. A method for discharging materials from a U-shaped furnace for producing titanium sponge, characterized in that: The U-shaped furnace for producing titanium sponge according to any one of claims 6 to 9 comprises: The wall temperature of the reaction zone in the reactor is set to 740° C. to 850° C., the temperature of the reaction product sedimentation storage zone in the reactor is set to 780° C. to 820° C., and the temperature of the ladle is set to 715° C. to 800° C.; During the magnesium melting and temperature rising process, the pressure at the first end of the feed pipe is controlled to be 28 kPa to 30 kPa, and the pressure in the upper space of the reactor is controlled to be 5 kPa to 25 kPa. During the titanium tetrachloride addition process, the pressure at the first end of the feed pipe is controlled to be 28 kPa to 30 kPa, and the pressure in the upper space of the reactor is controlled to be 5 kPa to 25 kPa. During the magnesium chloride discharge process, the pressure in the reactor is released to 2 kPa to 5 kPa, the feed pipe is connected to the transverse connecting pipe, and the temperature of the transverse connecting pipe is increased to 720° C. to 800° C. using the first heating component; The vertical pipe insertion port of the ladle is connected to the longitudinal connecting pipe, the upper pressure of the reactor is controlled to be 30 kPa to 50 kPa, the discharge rate of magnesium chloride is controlled to be 200 kg / min to 400 kg / min, and the discharge amount of magnesium chloride is controlled to be less than the accumulated amount of magnesium chloride in the reaction product sedimentation storage area; After the discharge is completed, the pressure in the upper space of the reactor is released to 2kPa to 5kPa, the connection between the lifting pipe and the horizontal connecting pipe is disconnected, the horizontal connecting pipe is filled with inert gas, and the pressure is controlled at 30kPa to 50kPa, the lifting pipe is filled with inert gas, and the pressure is controlled at 28kPa to 30kPa, and the lifting bag is filled with inert gas, and the pressure is controlled at 2kPa to 5kPa.