Method for producing titanium sponge using a 16-ton and above reactor and large cone reactor thereof

Abstract

The present application relates to a kind of 16 tons above energy-saving high-quality efficient production of titanium sponge method and its large-scale conical reactor.To solve the problem of titanium sponge sintering after the large-scale of reactor, the reactor body is equipped with a screen plate in the lower part, the conical frustum heat dissipation cylinder with lower large and upper small is placed on the screen plate, the upper end of the conical frustum heat dissipation cylinder is open, and the height of the upper end reaches at least half of the height of the reactor body.The reactor body has a diameter of more than 2.2 meters and a length of more than 6.3 meters, and the improved conical tube-shaped reactor body is upward from the screen plate, the lower and upper walls of the conical frustum heat dissipation cylinder are provided with multiple air holes for upper and lower air supply.The height of the upper end of the conical frustum heat dissipation cylinder reaches at least half of the height of the reactor body from the screen plate to the upper opening.The diameter of the lower air hole is larger than that of the upper air hole.In the production of titanium sponge with a capacity of 16 tons or more, the reactor is large-scale, the reactant flow is optimized, the titanium sponge lump is not easy to sinter, and it is easy to take out and the reactor is not easy to deform, thereby realizing the advantages of energy-saving, high-quality and efficient production of large-scale reactor.

Description

Technical Field

[0001] This invention relates to a method for producing sponge titanium, and more particularly to a method for producing sponge titanium with a capacity of 16 tons or more, and its large conical reactor. Background Technology

[0002] Currently, in the production of sponge titanium, to improve production efficiency, reduce energy consumption, minimize pollution, and enhance the quality of sponge titanium, the trend towards larger reactors and furnaces is urgent. Previously, most in the industry believed that smaller furnaces produced better quality, while larger furnaces resulted in hard cores in the sponge titanium lumps, making them difficult to break and severely impacting product quality. Many industry owners also wanted to adopt larger furnaces, but for a long time, using furnaces with capacities of 7 to 13 tons to produce sponge titanium resulted in hard cores in the sponge titanium lumps, making them difficult to break and severely affecting the quality of the sponge titanium.

[0003] A sponge titanium reduction distillation reactor, document number CN217297970U, is disclosed. It comprises a primary cylindrical body (1), a secondary frustum-conical body (2), a tertiary frustum-conical body (3), and a quaternary arc-shaped head (4). The large end of the secondary frustum-conical body (2) is connected to one end of the primary cylindrical body (1), and the small end is connected to the large end of the tertiary frustum-conical body (3). The small end of the tertiary frustum-conical body is connected to the open end of the quaternary arc-shaped head (4). Several partitions (6) are spaced apart within the quaternary arc-shaped head (4). Through holes (61) are provided on the partitions (6), and the through holes (61) on adjacent partitions (6) are staggered. The diameter of the primary cylindrical body (1) is 1-2.5 m, and its length is 1 / 2 to 3 / 4 of the length of the secondary frustum-conical body (2). The length of the secondary truncated cone cylinder (2) should be 1 / 2 to 3 / 4 of that of the tertiary truncated cone cylinder (3). The length of the quaternary arc head (4) is greater than 0.3m. There are at least 5 partitions (6). The lower end face of the partition (6) is an arc-shaped structure, and the upper end face of all partitions (6) is in the same plane. The taper of the secondary truncated cone cylinder (2) and the tertiary truncated cone cylinder (3) is 2 to 4°. It also includes a grid (5), which is laid on the upper end of the partition (6). This arrangement makes the entire reactor have a structure that is larger at the top and smaller at the bottom, which facilitates the removal of the sponge titanium agglomerate. It solves the problem that the upper part of the cylinder of the existing cylindrical reactor is rapidly deformed due to high temperature and gravity during the reduction distillation process, and the sponge titanium agglomerate is prone to jamming during the removal process.

[0004] The applicant company has applied for Chinese invention patent CN216891151U, which describes a large-scale hollow sponge titanium production device. The device includes a reactor cylinder with a large cover, a feeding pipe on the cover, an elliptical end cap at the bottom of the reactor, and a sieve plate inside the reactor. Above the sieve plate, a conical cylinder with a wide lower end (open) and a flat or convex upper end (flat or convex), with a height at least half the height of the sponge titanium mass inside the reactor cylinder, is placed, center-up. The height of the conical cylinder is 50%–100% of the height of the sponge titanium mass inside the reactor cylinder, and the convex top is a dome. Multiple through holes are provided on the lower peripheral wall of the conical cylinder. The diameter of the through holes is 10–20 mm. The through holes are arranged in multiple vertical layers, symmetrically and alternately distributed from top to bottom on the lower peripheral wall of the conical cylinder. The transverse through holes are arranged in symmetrically staggered vertical N layers; the odd-numbered layers in the N layers have longitudinally symmetrical through holes, and the even-numbered layers have transversely symmetrical through holes, or the even-numbered layers in the N layers have longitudinally symmetrical through holes, and the odd-numbered layers have transversely symmetrical through holes. The vertical plane containing all longitudinally symmetrical through holes intersects perpendicularly with the vertical plane containing the transversely symmetrical through holes. The taper of the conical cylinder is 5°–20°. The bottom of the inner cavity of the conical cylinder has a holding device for removing the conical cylinder, which is a conical cylinder with an outer circumference diameter of Φ100–200mm at its narrower end. The holding device is a cross-shaped or grid-shaped grabber with or without a downward-extending handle, fixedly installed above the lower end of the inner cavity of the conical cylinder, with an outer circumference diameter ranging from Φ100–200mm. This design offers advantages such as less sintering of the sponge titanium in the center of the large reactor cylinder cavity, shorter distillation time, and no loss of liquid magnesium.

[0005] However, during the process of scaling up reactors with a capacity of 16 tons or more of sponge titanium, the applicant company discovered that abnormal material flow was prone to occur inside the reactor, sponge titanium lumps were prone to sintering, making them difficult to remove, and reactor deformation problems, which affected the energy-saving, high-quality and efficient production of large reactors. Summary of the Invention

[0006] The purpose of this invention is to overcome the aforementioned deficiencies of the prior art and provide a method for producing high-quality, efficient, and energy-saving sponge titanium with a capacity of 16 tons or more. This invention also provides a large conical reactor for implementing this method. This invention solves the problems encountered during the scaling up of reactors, such as abnormal material flow within the reactor, sintering of the sponge titanium agglomerates, difficulty in removal, and reactor deformation, which affect the energy-saving, high-quality, and efficient production of large reactors.

[0007] To achieve the above objectives, the present invention provides a method for producing 16 tons or more of energy-efficient, high-quality, and high-efficiency sponge titanium. This method utilizes a reactor body with a large top cover, a sieve plate at the lower part of the reactor body, and a frustum-shaped heat sink with a lower opening and a height at least half the height of the reactor body, placed on the sieve plate with its center facing upwards. The method is characterized by using a reactor body with a diameter of 2.2 meters or more and a length of 6.3 meters or more, and employing a modified conical reactor body that is wider at the top and narrower at the bottom from the sieve plate upwards. Multiple ventilation holes are provided on the lower and upper peripheral walls of the frustum-shaped heat sink for ventilation in both the upper and lower parts. Using a reactor body with a diameter of 2.2 meters or more and a length of 6.3 meters or more—that is, a reactor with a capacity of 16 tons or more of sponge titanium—in the actual production process of large-scale reactors, the excessively large volume leads to abnormal internal material flow compared to traditional production methods. This causes serious problems such as sintering of the sponge titanium agglomerates, making large-scale reactors impossible. However, by adopting the above technical solution, the reactor body shape, which is conical at the top and narrow at the bottom, is beneficial to the material flow in the reaction section. This increases the flow space of liquid magnesium in the sponge titanium formation zone, optimizes the reaction material flow, and makes the liquid... Magnesium floats well during the reduction reaction; correspondingly, the frustum-shaped heat sink features multiple vents on its lower and upper peripheral walls, significantly reducing the material flow intensity in the central region where sponge titanium is prone to sintering, thus preventing the sponge titanium agglomerate from sintering. In short, the combination of these two distinct technologies solves the problem of abnormal material flow within large reactors, preventing sponge titanium agglomerates from easily sintering, optimizing reaction material flow, effectively preventing localized overheating of the reactor, suppressing reactor deformation, and fully leveraging the energy-saving, high-quality, and efficient production advantages of large reactors. Therefore, with smooth material flow within the reactor, reduced sponge titanium agglomerate sintering, easier removal, and less reactor deformation, energy-saving, high-quality, and efficient production can be achieved in large reactors.

[0008] As an optimization, the height of the upper end of the frustum-shaped heat dissipation cylinder is at least half the height of the reactor body from the sieve plate to its upper opening. This is beneficial for relatively increasing production capacity within a limited reactor volume and ensuring smooth material flow within the reactor. The diameter of the vent hole is 10–50 mm. Compared with the vent hole diameter of 10–20 mm in the prior art, this can well meet the needs of various large-capacity conical reactors.

[0009] As an optimization, the diameter of the lower vent is larger than that of the upper vent, relatively reducing the lower ventilation resistance. Both the lower and upper vents of the frustoconical heat sink have at least one layer. The number of vents per layer in the lower part is greater than the number of vents per layer in the upper part. The taper of the frustoconical heat sink is 1°-45° for large reactors.

[0010] As an optimization, the frustum-shaped heat sink is made of high-temperature resistant metal material by casting or welding high-temperature resistant metal sheet, and a titanium protective layer is set on its outer surface to prevent foreign material from falling off the frustum-shaped heat sink and causing impurities in the sponge titanium. The titanium protective layer is formed by spraying and diffusion process, and the thickness of the titanium-infiltrated layer is 2-10μm; the frustum-shaped heat sink is made of cast steel, cast iron, stainless steel plate, or iron plate.

[0011] As an optimization, the inner circumference of the frustoconical heat sink is provided with reinforcing ribs. The reinforcing ribs are either spiral reinforcing ribs extending upward from the bottom of the inner circumference of the frustoconical heat sink or axial reinforcing ribs distributed at intervals in the circumference.

[0012] The large conical reactor used in the method for energy-saving, high-quality, and efficient production of sponge titanium of 16 tons or more according to the present invention uses a sieve plate in the lower part of the reactor body equipped with a large top cover. A frustum-shaped heat sink with a lower opening and a height at least half the height of the reactor body is placed on the sieve plate, with the center facing upwards. Its special feature is that the reactor body, with a diameter of 2.2 meters or more and a length of 6.3 meters or more, is a conical tube shape from the sieve plate upwards, wider at the top and narrower at the bottom. Multiple ventilation holes are provided on the lower and upper peripheral walls of the frustum-shaped heat sink. Using a reactor body with a diameter of 2.2 meters or more and a length of 6.3 meters or more, i.e., a reactor with a capacity of 16 tons or more of sponge titanium, results in abnormal internal material flow compared to traditional small and medium-sized reactors due to its excessively large volume. This leads to serious problems such as easy sintering of the sponge titanium agglomerates, making large-scale reactor production impossible. However, by adopting the above technical solution, the reactor body shape, with its upper opening and lower opening, is conical, which is beneficial to the material flow in the reaction section. This increases the flow space of liquid magnesium in the sponge titanium formation zone, optimizes the reaction material flow, and makes the liquid... Magnesium floats well during the reduction reaction; correspondingly, the frustum-shaped heat sink features multiple vents on its lower and upper peripheral walls, significantly reducing the material flow intensity in the central region where titanium sponge tends to sinter, thus preventing titanium sponge agglomerates from sintering. In short, the combination of these two distinct technologies solves the problem of abnormal material flow within large reactors, preventing titanium sponge agglomerates from sintering, ensuring smoother material flow within the reactor, effectively preventing localized overheating, suppressing reactor deformation, and fully leveraging the energy-saving, high-quality, and efficient production advantages of large reactors. Therefore, by optimizing reaction material flow, reducing the likelihood of titanium sponge agglomerate sintering, facilitating removal, and preventing reactor deformation, energy-saving, high-quality, and efficient production in large reactors can be achieved.

[0013] As an optimization, the height of the upper end of the frustum-shaped heat sink is at least half the height of the reactor body from the sieve plate to its upper opening. This is beneficial for relatively increasing production capacity within a limited reactor volume and ensuring smooth material flow within the reactor. The diameter of the vent holes is 10-50 mm. Compared with the 10-20 mm vent diameter in the prior art, this can well adapt to the needs of various large-capacity conical reactors. The diameter of the lower vent holes is larger than that of the upper vent holes. This can adapt to the needs of various large-capacity conical reactors. The lower and upper vent holes of the frustum-shaped heat sink are each at least one layer. Layers can be added as needed to adapt to the needs of various large-capacity conical reactors. The number of vent holes in each lower layer is greater than the number of vent holes in each upper layer. This can adapt to the needs of various large-capacity conical reactors. The taper of the frustum-shaped heat sink is 1°-45° to adapt to the needs of various large-capacity conical reactors.

[0014] As an optimization, the frustum-shaped heat sink is made of high-temperature resistant metal material by casting or welding high-temperature resistant metal sheet. A titanium protective layer is applied to its outer surface to prevent components of the frustum-shaped heat sink from entering the sponge titanium, avoiding Fe element contamination of the sponge titanium and the introduction of foreign matter, thus ensuring the stability of the product's chemical elements. The titanium protective layer is formed by a spraying and diffusion process, with a thickness of 2-10 μm. The frustum-shaped heat sink is made of cast steel, cast iron, stainless steel sheet, or iron sheet. The steel sheet type is formed by stamping and welding of steel sheet.

[0015] As an optimization, the inner circumference of the frustoconical heat sink is reinforced with ribs. This significantly enhances resistance to deformation, especially tensile strength, and particularly extends the lifespan of the titanium protective layer on the outer surface. The ribs are either spiral ribs extending upwards from the bottom of the inner circumference of the frustoconical heat sink or axial ribs spaced circumferentially.

[0016] Using the technical solution of this invention, our company has successfully produced large sponge titanium lumps of 16 tons and above, with significant improvements in quality, yield, and productivity! Energy consumption and pollution are significantly reduced (for small furnaces under 8 tons producing sponge titanium, the electricity consumption per ton of sponge titanium in the reduction distillation section is around 400 kWh). This invention uses a large conical reactor of 16 tons and above, along with supporting equipment and a new production method for sponge titanium! It solves the problem of high temperature in the middle of large titanium lumps causing a hard core and affecting quality. Furthermore, it reduces energy consumption by about 50% in the reduction distillation section of sponge titanium production, correspondingly reduces pollution by about 50%, increases the quality of products of Grade 1 and above by more than 10%, and increases production capacity by more than 13%. This significantly improves the company's operating efficiency and social benefits! In other words, our company has independently developed and produced the world's largest first batch of 14-ton, 15-ton, 16-ton, 17-ton, 18-ton, 19-ton, and 20-ton sponge titanium lumps! Among them, the 20-ton sponge titanium lump was successfully produced with high quality on September 30, 2022.

[0017] In summary, the experimental results demonstrate that using this radiator cylinder to prepare this large conical reactor for the production of sponge titanium results in no sintered hard core in the center of the titanium mass, and significantly improves the quality, reduces energy consumption, and correspondingly reduces wastewater discharge. Unexpectedly, the larger the furnace and reactor used for producing sponge titanium, the better the quality, the lower the energy consumption, and the less wastewater discharge.

[0018] After adopting the above technical solution, the method for producing sponge titanium with an energy-saving, high-quality and efficient capacity of 16 tons and above and its large conical reactor have the advantages of optimizing the reaction flow in the large-scale production of sponge titanium with a capacity of 16 tons and above, making it less prone to sintering of sponge titanium lumps, easy to remove, and the reactor no longer easily deformed, thereby achieving the advantages of energy-saving, high-quality and efficient production of large reactors. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of a large conical reactor and its associated production equipment used to implement the method of the present invention; in the figure, 1 is a large conical reactor of 16 tons or more, 2 is a furnace shell, 3 is a sieve plate, 4 is a frustoconical heat dissipation cylinder, 5 is a titanium block, 6 is a large cover of the hot end reactor, 7 is a passage heater, 8 is a condensation support tank, the condensation support tank 8 is configured for the cold end of the large conical reactor 1 of 16 tons or more, 41 is a titanium protective layer, 42 is a lower vent, 43 is a cross-shaped holding device, 44 is an upper vent, and 45 is a reinforcing rib; Figure 2 This is a three-dimensional structural schematic diagram of the first embodiment of the frustum-shaped heat dissipation cylinder in a large conical reactor used to implement the method of the present invention; Figure 3 This is a bottom view of the second embodiment of the frustum-shaped heat sink in a large conical reactor used to implement the method of the present invention. Detailed Implementation

[0020] The present invention provides a method for producing 16 tons or more of energy-efficient, high-quality, and high-efficiency sponge titanium. This method utilizes a reactor body with a large top cover, a sieve plate at the bottom, and a frustum-shaped heat sink with a lower opening and an upper height at least half the height of the reactor body, placed on the sieve plate. The method involves using a reactor body with a diameter of 2.2 meters or more and a length of 6.3 meters or more. The reactor body is a modified conical tube shape, wider at the top and narrower at the bottom, with multiple ventilation holes on the lower and upper periphery of the frustum-shaped heat sink for ventilation. Using reactor bodies with a diameter of 2.2 meters or more and a length of 6.3 meters or more—that is, reactors with a capacity of 16 tons or more of sponge titanium—in actual large-scale production processes, the excessively large volume leads to abnormal internal material flow compared to traditional production methods. This causes a serious problem of sponge titanium lumps easily sintering, making large-scale reactors impossible. However, by adopting the above-mentioned technical solution, the reactor body shape, which is a cone-shaped tube with a larger upper part and a smaller lower part, is designed to facilitate the material flow in the reaction section. This increases the flow space of liquid magnesium in the sponge titanium formation zone, optimizes the reaction material flow, and allows the liquid magnesium to float better and participate in the reduction reaction. Complementing this is the innovative use of multiple vent holes on the lower and upper peripheral walls of the frustum-shaped heat sink, which significantly reduces the material flow intensity in the central area of ​​the frustum-shaped heat sink, which is prone to sponge titanium sintering, thereby preventing the sponge titanium lumps from sintering. In short, the combination of the above two sets of differentiated technologies can solve the problem of abnormal internal material flow in large reactors. The sponge titanium lumps are no longer prone to sintering, and the internal material flow of the reactor is smoother. This effectively avoids local overheating of the reactor, suppresses reactor deformation, and fully leverages the advantages of large-scale reactors in energy-saving, high-quality, and efficient production. Therefore, with optimized reaction flow, the sponge titanium agglomerate is less prone to sintering, easier to remove, and the reactor is no longer easily deformed, thus enabling energy-saving, high-quality, and efficient production in large reactors.

[0021] Specifically, the height of the upper part of the frustum-shaped heat dissipation cylinder should be at least half the height of the reactor body from the sieve plate to its upper opening. This is beneficial for relatively increasing production capacity within a limited reactor volume and ensuring smooth material flow within the reactor. The diameter of the vent hole is 10–50 mm. Compared with the vent hole diameter of 10–20 mm in the prior art, this can well meet the needs of various large-capacity conical reactors.

[0022] Specifically, the diameter of the lower vent is larger than that of the upper vent, thus relatively reducing the lower ventilation resistance. Both the lower and upper vents of the frustum-shaped heat sink have at least one layer. The number of vents in each lower layer is greater than the number of vents in each upper layer. The taper of the frustum-shaped heat sink is 1°-45° for large reactors.

[0023] Specifically, the frustum-shaped heat sink is made of high-temperature resistant metal material through casting or welding. A titanium protective layer is applied to its outer surface to prevent foreign material from detaching and contaminating the sponge titanium. The titanium protective layer, formed by a spraying and diffusion process, has a thickness of 2-10 μm. The frustum-shaped heat sink is made of cast steel, cast iron, stainless steel, or iron plate. Reinforcing ribs are provided on the inner circumference of the frustum-shaped heat sink. These reinforcing ribs are either spiral ribs extending upwards from the bottom of the inner circumference of the frustum-shaped heat sink or axially spaced reinforcing ribs.

[0024] Example 1 of a large conical reactor used to implement the method of the present invention, such as... Figure 1 As shown in Figure 2, a sieve plate 3 is installed in the lower part of the reactor body 1, which is equipped with a large top cover 6. A frustum-shaped heat dissipation cylinder 4, with its lower end wider than its upper end and an opening at least half the height of the reactor body, is placed on the sieve plate 3, facing upwards. The reactor body 1, with a diameter of 2.2 meters or more and a length of 6.3 meters or more, is a conical tube shape, wider at the top and narrower at the bottom, starting from the sieve plate 3. Multiple ventilation holes are provided on the lower and upper peripheral walls of the frustum-shaped heat dissipation cylinder 4. Using a reactor body with a diameter of 2.2 meters or more and a length of 6.3 meters or more, specifically for reactors with a capacity of 16 tons or more of sponge titanium, in actual production, results in abnormal internal material flow compared to traditional small and medium-sized reactors due to the excessively large volume. This leads to a serious problem of sponge titanium agglomeration easily sintering, making large-scale reactor production impossible. However, by adopting the above technical solution, the reactor body shape, with its conical shape (wider at the top and narrower at the bottom), which is beneficial to the material flow in the reaction section, increases the flow space of liquid magnesium in the sponge titanium formation zone, optimizes the reaction material flow, and makes the liquid... Magnesium floats well during the reduction reaction; correspondingly, the frustum-shaped heat sink features multiple vents on its lower and upper peripheral walls, significantly reducing the material flow intensity in the central region where titanium sponge tends to sinter, thus preventing titanium sponge agglomerates from sintering. In short, the combination of these two distinct technologies solves the problem of abnormal material flow within large reactors, preventing titanium sponge agglomerates from sintering, ensuring smoother material flow within the reactor, effectively preventing localized overheating, suppressing reactor deformation, and fully leveraging the energy-saving, high-quality, and efficient production advantages of large reactors. Therefore, by optimizing reaction material flow, reducing the likelihood of titanium sponge agglomerate sintering, facilitating removal, and preventing reactor deformation, energy-saving, high-quality, and efficient production in large reactors can be achieved.

[0025] Specifically, the height of the upper end of the frustum-shaped heat sink 4 is at least half the height of the reactor body 1 from the sieve plate 3 to its upper opening. The diameter of the vent 1 is 10-50 mm. Preferably, the diameter of the lower vent 42 is larger than the diameter of the upper vent 44. Specifically, the lower vent 42 and the upper vent 44 of the frustum-shaped heat sink 4 each have at least one layer. The number of vents 42 in each layer of the lower layer is greater than the number of vents 44 in each layer of the upper layer. The taper of the frustum-shaped heat sink 4 is 1°-45°. The frustum-shaped heat sink 4 is made of high-temperature resistant metal material by casting or welding high-temperature resistant metal plate, and a titanium protective layer 41 is provided on its outer surface. The titanium protective layer 41 is formed by spraying and diffusion process, and the thickness of the titanium-infiltrated layer is 2-10 μm. The component labeled 43 in the figure is a cross-shaped gripping device.

[0026] Example 2 of a large conical reactor used to implement the method of the present invention, such as... Figure 3 As shown, the difference from Embodiment 1 above is that: the inner circumference of the frustoconical heat sink 4 is provided with reinforcing ribs 45. The reinforcing ribs 45 are four axially spaced reinforcing ribs 45 extending upward from the bottom of the inner circumference of the frustoconical heat sink 4. The reinforcing ribs can also be spiral-shaped extending upward from the bottom of the inner circumference of the frustoconical heat sink.

[0027] Using the technical solution of this invention, our company has successfully produced large sponge titanium lumps of 16 tons and above, with significant improvements in quality, yield, and productivity! Energy consumption and pollution are significantly reduced (for small furnaces under 8 tons producing sponge titanium, the electricity consumption per ton of sponge titanium in the reduction distillation section is around 400 kWh). This invention uses a large conical reactor of 16 tons and above, along with supporting equipment and a new production method for sponge titanium! It solves the problem of high temperature in the middle of large titanium lumps causing a hard core and affecting quality. Furthermore, it reduces energy consumption by about 50% in the reduction distillation section of sponge titanium production, correspondingly reduces pollution by about 50%, increases the quality of products of Grade 1 and above by more than 10%, and increases production capacity by more than 13%. This significantly improves the company's operating efficiency and social benefits! In other words, our company has independently developed and produced the world's largest first batch of 14-ton, 15-ton, 16-ton, 17-ton, 18-ton, 19-ton, and 20-ton sponge titanium lumps! Among them, the 20-ton sponge titanium lump was successfully produced with high quality on September 30, 2022.

[0028] In summary, the present invention provides a method for energy-saving, high-quality and efficient production of sponge titanium with a capacity of 16 tons or more, and its large conical reactor has the advantages of optimizing the reaction flow in large-scale production of sponge titanium with a capacity of 16 tons or more, making it less prone to sintering of sponge titanium lumps, easy to remove, and preventing the reactor from deforming, thereby achieving energy-saving, high-quality and efficient production in large reactors.

Claims

1. A method for producing titanium sponge using a reactor with a capacity of 16 tons or more, wherein a reactor body is provided with a sieve plate at the lower part of the reactor body, a conical frustum-shaped heat dissipation cylinder with a large lower end and a small upper end is placed on the upper surface of the sieve plate and extends upward from the center, the height of the upper end is at least half the height of the reactor body, and the reduction reaction of titanium sponge is carried out inside the reactor. The reactor body has a diameter of more than 2.2 meters and a length of more than 6.3 meters, and is in a conical tube shape with the upper part being larger than the lower part from the sieve plate upwards; the lower part and the upper part of the conical tube are provided with a plurality of air holes for air supply of the upper part and the lower part respectively. The diameter of the lower air hole is larger than that of the upper air hole, so as to reduce the air resistance of the lower part; the lower air hole and the upper air hole of the conical tube are each at least one layer.

2. The method of claim 1, wherein The height of the upper end of the conical tube is at least half of the height of the reactor body from the sieve plate to the upper opening; the diameter of the air hole is 10-50 mm.

3. The method of claim 1, wherein The conical tube is made of high-temperature-resistant metal material by casting or welding, and is provided with a titanium protective layer on the outer surface to prevent the titanium sponge from being doped by foreign materials falling off the conical tube; the titanium protective layer is formed by spraying and diffusion to form a titanium infiltration layer with a thickness of 2-10 μm; the conical tube is made of cast steel, cast iron, stainless steel plate or iron plate.

4. The method of claim 1, wherein The inner periphery of the conical tube is provided with reinforcing ribs, which are spiral reinforcing ribs extending upwards from the bottom of the inner periphery of the conical tube or axially reinforcing ribs distributed at intervals in the circumferential direction.

5. Large-scale conical reactor for implementing the method for producing titanium sponge using reactors of 16 tons and more according to claim 1, characterized in that The reactor is provided with a large opening cover, and the reactor body is provided with a sieve plate; the conical tube with a lower opening and an upper opening of which the upper part is larger than the lower part is placed on the center of the sieve plate and has an upper end height of at least half of the height of the reactor body; the reactor body has a diameter of more than 2.2 meters and a length of more than 6.3 meters, and is in a conical tube shape with the upper part being larger than the lower part from the sieve plate upwards; the lower part and the upper part of the conical tube are provided with a plurality of air holes for air supply of the upper part and the lower part respectively. The diameter of the lower air hole is larger than that of the upper air hole, so as to reduce the air resistance of the lower part; the lower air hole and the upper air hole of the conical tube are each at least one layer.

6. The large cone reactor according to claim 5, characterized in that The height of the upper end of the conical tube is at least half of the height of the reactor body from the sieve plate to the upper opening; the diameter of the air hole is 10-50 mm.

7. The large cone reactor of claim 5, wherein The conical tube is made of high-temperature-resistant metal material by casting or welding, and is provided with a titanium protective layer on the outer surface to prevent the titanium sponge from being doped by foreign materials falling off the conical tube; the titanium protective layer is formed by spraying and diffusion to form a titanium infiltration layer with a thickness of 2-10 μm; the conical tube is made of cast steel, cast iron, stainless steel plate or iron plate.

8. The large cone reactor of claim 5, wherein The inner periphery of the conical tube is provided with reinforcing ribs, which are spiral reinforcing ribs extending upwards from the bottom of the inner periphery of the conical tube or axially reinforcing ribs distributed at intervals in the circumferential direction.

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