Iron-nickel alloy high-temperature chlorination separation system

Abstract

The utility model discloses an iron-nickel alloy high-temperature chlorination separation system which comprises a feeding mechanism, a reaction chamber, a separation mechanism, a trapping mechanism and a tail gas backflow mechanism, a filler cavity, an iron-nickel alloy containing cavity and a feeding and exhausting cavity are formed in the reaction chamber, particles are filled in the filler cavity, a chlorine inlet and a hot gas inlet are formed in the bottom of the filler cavity, and the tail gas backflow mechanism is arranged in the reaction chamber. The feeding mechanism is communicated with the feeding and exhausting cavity, a gas phase exhausting opening is formed in the side wall of the feeding and exhausting cavity, the separating mechanism is communicated with the gas phase exhausting opening and used for separating nickel chloride from an iron-nickel-containing gas phase, and the trapping mechanism is communicated with the separating mechanism and used for receiving ferric chloride gas of the separating mechanism, cooling the ferric chloride gas into a solid state and trapping the ferric chloride gas. The tail gas backflow mechanism is communicated with the trapping mechanism and the feeding mechanism. The iron-nickel alloy high-temperature chlorination separation system has the advantages that the production process can be simplified, the overall production efficiency is improved, and the overall production effect is improved.

Description

Technical Field

[0001] This utility model relates to the field of alloy separation and resource utilization technology, specifically to a high-temperature chlorination separation system for iron-nickel alloys. Background Technology

[0002] Chinese patent document with application number 202410981328.X discloses a method and apparatus for separating iron from nickel-iron alloys. Specifically, it discloses an apparatus for separating iron from nickel-iron alloys, including a roasting furnace, a separation mechanism, a chlorination reaction chamber, a condensation mechanism, and a collection mechanism. The roasting furnace includes a furnace body and a first chlorine gas inlet. The furnace body has a receiving cavity for accommodating the nickel-iron alloy, and the first chlorine gas inlet is connected to the receiving cavity. The mass of the chlorine gas introduced is 0.8 to 1.5 times the mass of the nickel-iron alloy. The operating principle of this nickel-iron alloy iron separation device is as follows: 10 kg of nickel-iron alloy is added to a calcining furnace in 10 batches at a uniform rate. After the first batch is added, chlorine gas is introduced into the calcining furnace through the first chlorine inlet. The amount of chlorine gas introduced is 1.2 times the mass of the nickel-iron alloy in the calcining furnace, and the calcination temperature is 650℃. After the molten ferrous chloride in the calcining furnace flows into the chlorination reaction chamber, chlorine gas is introduced into the chlorination reaction chamber through the second chlorine inlet. The chlorination temperature is 600℃, and the amount of chlorine gas introduced is 0.3 times the mass of the ferrous chloride in the chlorination reaction chamber. The ferric chloride volatilized from the chlorination reaction chamber flows into a condensation mechanism for condensation and collection. The condensation temperature of the condensation mechanism is controlled at 200℃. The device for separating iron from nickel-iron alloy has the following shortcomings: 1) It requires separate roasting furnace and chlorination reaction chamber. Ferrous chloride melt is generated in the roasting furnace, and then ferrous chloride melt is reacted with chlorine gas in the chlorination reaction chamber to generate ferric chloride. On the one hand, the device structure is complex, resulting in a complicated production process and poor production efficiency. On the other hand, the roasting furnace and chlorination reaction chamber need to be temperature controlled separately, which is difficult and affects production efficiency and effect. 2) There is no chlorine gas reflux mechanism between the condensation mechanism or collection mechanism and the feeding component. On the one hand, the excess chlorine gas generated by the incomplete reaction is directly discharged into the air, polluting the environment. On the other hand, the material in the feeding component is not mixed with chlorine gas in advance, resulting in poor efficiency and effect of subsequent reactions.

[0003] Currently, the methods for separating nickel-iron alloys include wet stepwise crystallization + ferric phosphate precipitation and roasting-dissolution. The disadvantages of wet stepwise crystallization + ferric phosphate precipitation are: 1) High process complexity, requiring multiple steps such as leaching, evaporation concentration, cooling crystallization, and oxidation precipitation. The process is long and requires strict operation control (e.g., cooling temperature needs to be accurate to 0-40℃, pH adjustment needs to be controlled in stages). The amount of phosphorus source needs to be strictly controlled. Excessive phosphorus will lead to phosphorus residue requiring additional treatment, while insufficient phosphorus will result in incomplete iron precipitation; 2) High energy consumption and high equipment requirements. Evaporation concentration (50-100℃) and cooling crystallization (0-40℃) require a large amount of heat energy and cooling medium, resulting in high overall energy consumption. The acidic environment is highly corrosive to the equipment, requiring the use of corrosion-resistant materials (such as titanium alloys or special coatings), increasing investment costs; 3) High product impurities. Ferrous sulfate crystals need to be recrystallized and purified multiple times, otherwise they may contain trace amounts of nickel (about 0.03%), affecting purity. After ferric phosphate precipitation, the pH needs to be adjusted to 4-5, which may introduce alkali metal impurities such as sodium and potassium, requiring additional impurity removal steps; 4) Difficult treatment of acidic wastewater. The disadvantages of the roasting-dissolution method are: 1) High energy consumption at high temperatures, roasting requires 500-800℃ or even higher, resulting in high energy consumption; 2) Large amount of waste gas (SO3) and waste residue, resulting in high environmental pressure.

[0004] Chinese patent application number 202410981952.X discloses a method and apparatus for separating nickel from ferric alloy. Specifically, the method includes the following steps: calcining the nickel-ferric alloy in a chlorine-containing atmosphere to obtain calcined slag and a nickel-iron-containing gas phase, wherein the calcination temperature is 900℃-1200℃ and the calcination time is 60-180 min; subjecting the nickel-iron-containing gas phase to multi-stage condensation, collecting the solid phase obtained from the first stage of condensation to obtain nickel chloride product; wherein in the multi-stage condensation, the subsequent stage of condensation condenses the condensed gas phase obtained from the previous stage of condensation, and the condensation temperature of the subsequent stage of condensation is lower than that of the previous stage of condensation; the first stage of condensation is one of the multiple stages of condensation; the condensation temperature of the first stage of condensation is 450-700℃; collecting the solid phase obtained from the second stage of condensation to obtain ferric chloride product; wherein the second stage of condensation is one of the multiple stages of condensation and is located after the first stage of condensation; the condensation temperature of the second stage of condensation is 100℃-200℃. A device for separating nickel from ferronickel alloy is also disclosed, comprising: a calcining furnace for calcining the ferronickel alloy in a chlorine-containing atmosphere to obtain calcined slag and a nickel-iron-containing gas phase, wherein the calcination temperature is 900℃-1200℃ and the calcination time is 60-180 min; a multi-stage condensation mechanism connected to the calcining furnace for receiving the nickel-iron-containing gas phase and performing multi-stage condensation on the nickel-iron-containing gas phase; wherein the subsequent stage of the multi-stage condensation mechanism condenses the condensed gas phase obtained by the previous stage of the multi-stage condensation mechanism, and the condensation temperature of the subsequent stage of the multi-stage condensation mechanism is lower than that of the previous stage. The condensation temperature of the condensation mechanism in the multi-stage condensation system; wherein, the multi-stage condensation mechanism includes a first-stage condensation mechanism and a second-stage condensation mechanism, with the second-stage condensation mechanism located after the first-stage condensation mechanism; the condensation temperature of the first-stage condensation mechanism is 450℃-700℃; the condensation temperature of the second-stage condensation mechanism is 100℃-200℃; a first collection mechanism, connected to the first-stage condensation mechanism, is used to collect the solid phase obtained by the first-stage condensation mechanism to obtain nickel chloride product; a second collection mechanism, connected to the second-stage condensation mechanism, is used to collect the solid phase obtained by the second-stage condensation mechanism to obtain ferric chloride product.

[0005] The method for separating nickel and iron from nickel-iron alloy has the following shortcomings: 1) The roasting process yields roasting slag and iron-nickel-containing gas phase, which is difficult to control at temperature, affecting production efficiency and effect, and also consumes a lot of energy; 2) Excess chlorine gas generated from incomplete reaction is directly discharged into the air, polluting the environment; 3) The materials in the feeding assembly are not mixed with chlorine gas in advance, resulting in poor efficiency and effectiveness of subsequent reactions.

[0006] The device for separating nickel from iron alloy has the following shortcomings: 1) The roasting furnace requires roasting to react the nickel-iron alloy with chlorine gas to obtain roasting slag and iron-nickel gas phase, and its specific structure is not disclosed, making it difficult to meet the requirements for efficient reaction of nickel-iron alloy and chlorine gas, as well as the requirements for efficient separation of roasting slag and iron-nickel gas phase; 2) It is unclear how the roasting furnace is fed, and how to meet the feeding requirements to obtain good reaction efficiency and efficiency; 3) No chlorine reflux mechanism is set up, and the excess chlorine gas generated by incomplete reaction is directly discharged into the air, polluting the environment. Utility Model Content

[0007] The technical problem to be solved by this utility model is to overcome the shortcomings of the existing technology and provide a high-temperature chlorination separation system for iron-nickel alloys that can simplify the production process, improve overall production efficiency and enhance overall production effect.

[0008] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0009] A high-temperature chlorination separation system for iron-nickel alloy includes a feeding mechanism, a reaction chamber, a separation mechanism, a collection mechanism, and a tail gas reflux mechanism. The reaction chamber comprises a packing cavity, an iron-nickel alloy receiving cavity, and a feeding / exhausting cavity, connected sequentially from bottom to top. The packing cavity is filled with non-reactive particles, with gaps between the particles allowing gas and powdery slag to pass through while obstructing the passage of iron-nickel alloy. The bottom of the packing cavity has a chlorine inlet and a hot gas inlet. The feeding mechanism is connected to the feeding / exhausting cavity and is used to feed iron-nickel alloy into it. The side wall of the feeding / exhausting cavity has a gas phase outlet for discharging the iron-nickel-containing gas phase. The separation mechanism is connected to the gas phase outlet and is used to separate nickel chloride from the iron-nickel-containing gas phase. The collection mechanism is connected to the separation mechanism and is used to receive ferric chloride gas from the separation mechanism and collect it after cooling it into a solid state. The tail gas reflux mechanism connects the collection mechanism and the feeding mechanism.

[0010] As a further improvement to the above technical solution:

[0011] The upper and lower parts of the packing cavity are both columnar, and the middle part is conical with a larger upper part and a smaller lower part. The iron-nickel alloy receiving cavity, the feed and exhaust cavity and the upper part of the packing cavity are connected to form a columnar space.

[0012] The chlorine inlet is located in the middle of the packing cavity, and the hot gas inlet is located in the lower part of the packing cavity.

[0013] The feeding mechanism includes a feeding pipe and a feeding assembly. The feeding pipe is set at an incline or vertical position. The bottom end of the feeding pipe is connected to the inlet end of the feeding assembly. The outlet end of the feeding assembly is connected to the inlet exhaust chamber. The exhaust gas return mechanism is connected to the collection mechanism and the feeding pipe.

[0014] The top of the reaction chamber is provided with a feed hopper, and the discharge end of the feeding assembly is connected to the feed exhaust chamber through the feed hopper. The feed hopper is set at an incline or vertical position, and the feeding assembly is set horizontally.

[0015] The top of the feeding pipe is connected to a drying pipe and has an exhaust outlet. The bottom of the drying pipe is equipped with a feeding valve and the top is equipped with a feeding hopper. The exhaust gas return mechanism is connected to the bottom of the feeding pipe.

[0016] The separation mechanism includes a first settling chamber and a second settling chamber. The lower part of the first settling chamber is connected to the gas phase outlet, and the lower part of the second settling chamber is connected to the upper part of the first settling chamber. The collection mechanism is connected to the upper part of the second settling chamber. A cooling component is provided on the first settling chamber, a heating component is provided on the second settling chamber, and a filter component is provided inside the second settling chamber.

[0017] The filtration assembly includes a fiber cotton filter layer and multiple fiber cotton filter cylinders. The fiber cotton filter layer is disposed in a second settling chamber. The bottom end of each fiber cotton filter cylinder is disposed on the fiber cotton filter layer. The first settling chamber is connected to the space below the fiber cotton filter layer. The collection mechanism is connected to the space above the fiber cotton filter layer.

[0018] The collection mechanism includes a collection chamber with a cooling function and a scraping assembly located in the collection chamber. The separation mechanism and the exhaust gas recirculation mechanism are both connected to the collection chamber. The scraping assembly is a spiral blade rotating wall scraping assembly or a scraper translating wall scraping assembly.

[0019] A high-temperature chlorination separation method for iron-nickel alloys, using the aforementioned high-temperature chlorination separation system for iron-nickel alloys, includes the following steps:

[0020] S1. A set amount of iron-nickel alloy is added into the feed and exhaust chamber through the feeding mechanism, so that the top surface of the iron-nickel alloy in the iron-nickel alloy receiving chamber is close to the gas phase exhaust port; hot gas is introduced into the packing chamber through the hot gas inlet to heat the reaction chamber.

[0021] S2. When the temperature of the packing chamber, the iron-nickel alloy receiving chamber and / or the feed and exhaust chamber reaches the set temperature, stop the hot gas from entering through the hot gas inlet; introduce chlorine gas into the packing chamber through the chlorine gas inlet so that the chlorine gas enters the iron-nickel alloy receiving chamber and reacts with the iron-nickel alloy to generate nickel chloride and ferric chloride.

[0022] S3. After each set reaction time, a set amount of iron-nickel alloy is added to the feed exhaust chamber through the feeding mechanism; the gas temperature at the gas phase outlet is controlled at 700℃~1000℃ so that both nickel chloride and ferric chloride are in the gas phase; the separation mechanism separates nickel chloride from the nickel chloride and ferric chloride gas flowing in from the gas phase outlet; the collection mechanism collects the ferric chloride gas received from the separation mechanism after cooling it into a solid state; the tail gas return mechanism transports the tail gas from the collection mechanism to the feeding mechanism.

[0023] Compared with the prior art, the advantages of this utility model are:

[0024] This invention relates to a high-temperature chlorination separation system for iron-nickel alloys. Firstly, through a specially structured reaction chamber, the iron-nickel alloy and chlorine gas within the chamber react chemically simply by introducing gas. The system can control the temperature of the gaseous outlet gas at 700℃~1000℃ by regulating the exothermic reaction and adjusting the chlorine gas inlet flow rate, ensuring that both nickel chloride and ferric chloride are in the gaseous phase. Compared to existing technologies, this system simplifies the structure by eliminating the need for a separate roasting furnace and chlorination reaction chamber, allowing for direct chemical reaction and generation of nickel chloride and ferric chloride gases within the reaction chamber. This results in a simpler production process and higher efficiency. In terms of temperature control, compared to first roasting and controlling the temperature in a roasting furnace and then reacting and controlling the temperature in a chlorination reaction chamber, controlling the temperature in a single reaction chamber is less difficult, and the overall production efficiency and effect are higher. Secondly, a tail gas recirculation mechanism is connected between the collection mechanism and the feeding mechanism. The tail gas recirculation mechanism can transport the tail gas containing chlorine discharged from the collection mechanism to the feeding mechanism, so that the iron-nickel alloy in the feeding mechanism is mixed with chlorine before entering the reaction chamber. This is beneficial to improving the reaction efficiency and effect in the reaction chamber, thereby improving the overall production efficiency and effect. At the same time, it can reduce the amount of chlorine emissions and reduce the impact on the environment. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of the high-temperature chlorination separation system for iron-nickel alloy of this utility model.

[0026] Figure 2 This is a cross-sectional schematic diagram of the reaction chamber of the high-temperature chlorination separation system for iron-nickel alloy of this utility model.

[0027] Figure 3 This is a cross-sectional structural schematic diagram of the first settling chamber of the high-temperature chlorination separation system for iron-nickel alloy of this utility model.

[0028] Figure 4 This is a cross-sectional schematic diagram of the second settling chamber of the high-temperature chlorination separation system for iron-nickel alloys of this utility model.

[0029] Figure 5 This is an exploded view of the filter assembly of the high-temperature chlorination separation system for iron-nickel alloy of this utility model.

[0030] Figure 6 This is a schematic diagram of the collection mechanism of the high-temperature chlorination separation system for iron-nickel alloy of this utility model.

[0031] Figure 7 This is another schematic diagram of the collection mechanism of the high-temperature chlorination separation system for iron-nickel alloy of this utility model.

[0032] Figure 8 This is a schematic diagram of the feeding pipe of the high-temperature chlorination separation system for iron-nickel alloy of this utility model.

[0033] The labels in the diagram represent:

[0034] 1. Feeding mechanism; 11. Feeding pipe; 12. Feeding assembly; 13. Feeding hopper; 131. Feeding valve; 2. Reaction chamber; 21. Packing chamber; 22. Iron-nickel alloy receiving chamber; 23. Feeding and exhaust chamber; 24. Particulate matter; 25. Chlorine inlet; 26. Hot gas inlet; 27. Gas phase outlet; 3. Separation mechanism; 31. First settling chamber; 32. Second settling chamber; 33. Cooling assembly; 34. Heating assembly; 35. Filter assembly; 351. Fiber cotton filter layer; 352. Fiber cotton filter cartridge; 4. Collection mechanism; 41. Collection chamber; 42. Scraping assembly; 5. Tail gas recirculation mechanism; 6. Iron-nickel alloy; 7. Drying pipe; 71. Feeding valve; 8. Tail gas outlet; 9. Feeding hopper. Detailed Implementation

[0035] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0036] In the description of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0037] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0038] In this utility model, unless otherwise explicitly specified and limited, the terms "assembly," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0039] Example 1:

[0040] Figures 1 to 8 This invention illustrates an embodiment of a high-temperature chlorination separation system for iron-nickel alloys. The system includes a feeding mechanism 1, a reaction chamber 2, a separation mechanism 3, a collection mechanism 4, and a tail gas recirculation mechanism 5. The reaction chamber 2 contains a packing cavity 21, an iron-nickel alloy receiving cavity 22, and a feeding and exhaust cavity 23, connected sequentially from bottom to top. The packing cavity 21 is filled with non-reactive particles 24, with gaps between the particles 24 allowing gas and powdery slag to pass through while obstructing the passage of the iron-nickel alloy. The bottom of the packing cavity 21... The device is equipped with a chlorine inlet 25 and a hot gas inlet 26. The feeding mechanism 1 is connected to the feeding exhaust chamber 23 and is used to feed the iron-nickel alloy 6 into the feeding exhaust chamber 23. The side wall of the feeding exhaust chamber 23 is provided with a gas phase outlet 27 for discharging the iron-nickel gas phase. The separation mechanism 3 is connected to the gas phase outlet 27 and is used to separate nickel chloride from the iron-nickel gas phase. The collection mechanism 4 is connected to the separation mechanism 3 and is used to receive the ferric chloride gas from the separation mechanism 3 and collect the ferric chloride gas after cooling it into a solid state. The tail gas return mechanism 5 is connected to the collection mechanism 4 and the feeding mechanism 1.

[0041] The production process of this high-temperature chlorination separation system for iron-nickel alloy is as follows: First, a set amount of iron-nickel alloy is added to the feed exhaust chamber 23 through the feeding mechanism 1, so that the top surface of the iron-nickel alloy 6 in the iron-nickel alloy receiving chamber 22 is close to the gas phase outlet 27; hot gas is introduced into the packing chamber 21 through the hot gas inlet 26 to heat the reaction chamber 2; Second, when the temperature of the packing chamber 21, the iron-nickel alloy receiving chamber 22, and / or the feed exhaust chamber 23 reaches the set temperature, the hot gas supply through the hot gas inlet 26 is stopped; chlorine gas is introduced into the packing chamber 21 through the chlorine gas inlet 25, allowing the chlorine gas to enter the iron-nickel alloy container. The reaction chamber 22 with the iron-nickel alloy produces nickel chloride and ferric chloride. In the third step, after each set reaction time, a set amount of iron-nickel alloy is added to the feed exhaust chamber 23 through the feeding mechanism 1. The gas temperature at the gas phase outlet 27 is controlled at 700℃~1000℃ so that both nickel chloride and ferric chloride are in the gas phase (containing iron-nickel gas phase). The separation mechanism 3 separates nickel chloride from the nickel chloride and ferric chloride gas flowing into the gas phase outlet 27. The collection mechanism 4 cools the ferric chloride gas received from the separation mechanism 3 into a solid state and then collects it. The tail gas return mechanism 5 transports the tail gas of the collection mechanism 4 to the feeding mechanism 1.

[0042] This high-temperature chlorination separation system for iron-nickel alloys, firstly, utilizes a specially structured reaction chamber 2. By introducing gas into the reaction chamber 2, a chemical reaction occurs between the iron-nickel alloy 6 within the iron-nickel alloy containment cavity 22 and chlorine gas. The temperature of the gas at the gas outlet 27 can be controlled between 700℃ and 1000℃ through the exothermic reaction and adjustment of the chlorine gas inlet flow, ensuring that both nickel chloride and ferric chloride are in the gaseous phase. Compared to existing technologies, this system eliminates the need for a simultaneous roasting furnace and chlorination reaction chamber, resulting in a simpler structure. The chemical reaction directly generates nickel chloride and ferric chloride gases within the reaction chamber 2, simplifying the production process and improving efficiency. Furthermore, it offers advantages such as… First, the temperature is controlled by roasting in the roasting furnace first, and then by reacting and controlling the temperature in the chlorination reaction chamber. It is easier to control the temperature in one reaction chamber 2, and the overall production efficiency and production effect are higher. Second, the tail gas return mechanism 5 is connected between the collection mechanism 4 and the feeding mechanism 1. The tail gas return mechanism 5 can transport the tail gas containing chlorine discharged from the collection mechanism 4 to the feeding mechanism 1. This allows the iron-nickel alloy 6 in the feeding mechanism 1 to be mixed with chlorine before entering the reaction chamber 2, which is beneficial to improving the reaction efficiency and effect in the reaction chamber 2. This is beneficial to improving the overall production efficiency and production effect. At the same time, it can reduce the amount of chlorine emissions and reduce the impact on the environment.

[0043] Furthermore, such as Figure 2As shown, in this embodiment, the upper and lower parts of the packing chamber 21 are both columnar, and the middle part is conical with a larger upper part and a smaller lower part. The iron-nickel alloy receiving chamber 22, the feed and exhaust chamber 23, and the upper part of the packing chamber 21 are connected to form a columnar space. This structure of the reaction chamber 2 facilitates processing and production, and also facilitates the addition of particulate matter 24 from top to bottom into the packing chamber 21. The particulate matter 24 in the packing chamber 21 can, on the one hand, impede the passage of iron-nickel alloy 6, allowing the iron-nickel alloy 6 to react within the iron-nickel alloy receiving chamber 22. On the other hand, it has a uniform distribution effect on the rising chlorine gas, which is beneficial for the chlorine gas to flow evenly to the iron-nickel alloy 6 within the iron-nickel alloy receiving chamber 22, thereby making the reaction of the iron-nickel alloy 6 more complete. Preferably, the particulate matter 24 is made of an inert material that does not react with chlorine gas, with a particle size of 5-20 mm and a spherical or irregular particle shape, such as alumina balls with a diameter of 10 mm.

[0044] Furthermore, in this embodiment, the chlorine inlet 25 is located in the middle of the packing cavity 21, and the hot gas inlet 26 is located in the lower part of the packing cavity 21. That is, the hot gas inlet 26 is located below the chlorine inlet 25. In this way, the hot gas entering the reaction chamber 2 has an upward pushing and preheating effect on the chlorine, so that the chlorine can rise more quickly into the iron-nickel alloy receiving cavity 22 and react better with the iron-nickel alloy 6.

[0045] Furthermore, such as Figure 1 As shown, in this embodiment, the feeding mechanism 1 includes a feeding pipe 11 and a feeding assembly 12. The feeding pipe 11 is inclined or vertically arranged, and its bottom end is connected to the inlet end of the feeding assembly 12. The outlet end of the feeding assembly 12 is connected to the inlet exhaust chamber 23. The tail gas return mechanism 5 connects the collection mechanism 4 and the feeding pipe 11. The iron-nickel alloy 6 enters the feeding assembly 12 through the feeding pipe 11 and is then transported to the reaction chamber 2 through the feeding assembly 12. Because the feeding pipe 11 is inclined or vertically arranged, the chlorine gas returning to the feeding pipe 11 mixes better with the iron-nickel alloy 6 during its ascent, improving the pre-mixing effect of the iron-nickel alloy 6 before entering the reaction chamber 2. The feeding assembly 12 is preferably an existing feeding assembly that uses spiral blades to push materials, or other feeding assemblies that can effectively prevent the gas from flowing back out. In this way, the material in the feeding assembly 12 has a blocking effect on the reverse flow of gas, preventing chlorine gas from flowing back out through the feeding assembly 12 and then being discharged through the feeding pipe 11, thus polluting the environment.

[0046] Furthermore, such as Figure 1In this embodiment, a feed hopper 13 is provided at the top of the reaction chamber 2. The discharge end of the feeding assembly 12 is connected to the feed exhaust chamber 23 through the feed hopper 13. The feed hopper 13 is set at an inclination or vertical position, while the feeding assembly 12 is set horizontally. The horizontal setting of the feeding assembly 12 is beneficial to improving the blocking effect on the reverse flow of gas. The discharge end of the feeding assembly 12 is connected to the feed exhaust chamber 23 through the feed hopper 13, and the feed hopper 13 is set at an inclination or vertical position, which facilitates the entry of the iron-nickel alloy 6 into the reaction chamber 2. In addition, it is convenient to verify the feed amount through the feed hopper 13 (for example, a feed valve 131 is set at the bottom of the feed hopper 13. Before feeding into the reaction chamber 2, the feed valve 131 is closed, and the feeding assembly 12 delivers a set amount of iron-nickel alloy 6, which first falls into the feed hopper 13. The amount is verified in the feed hopper 13. If there is too much, it is supplemented. After reaching the standard, the feed valve 131 is opened to feed). This is beneficial to accurately control the feed amount of the reaction chamber 2 each time.

[0047] Furthermore, in this embodiment, the top of the feeding pipe 11 is connected to a drying pipe 7 and is equipped with a tail gas outlet 8. The bottom of the drying pipe 7 is equipped with a feeding valve 71 and the top is equipped with a feeding hopper 9. The tail gas return mechanism 5 is connected to the bottom of the feeding pipe 11. The feeding hopper 9 facilitates the entry of the iron-nickel alloy 6 into the drying pipe 7. After the iron-nickel alloy 6 is dried by the drying pipe 7, it enters the feeding pipe 11. The tail gas outlet 8 is used to discharge the tail gas to the air or to the tail gas treatment equipment (such as after absorption by ferrous chloride or alkaline solution, and then discharged after meeting the environmental emission requirements). Furthermore, an induction coil can be installed on the drying pipe 7. The induction coil dries and heats the raw material in the drying pipe 7, heating the raw material to 150-200 degrees Celsius. After the material level in the feeding pipe 11 drops to a certain height, the feeding valve 71 is opened, and the raw material in the drying pipe 7 is added to the feeding pipe 11, where it mixes with the chlorine gas in the return tail gas and is absorbed. Preferably, the drying tube 7 is covered with a layer of insulation cotton (e.g., 5cm thick), and the induction coil is wound on the insulation cotton; the feeding tube 11 is also covered with a layer of insulation cotton (e.g., 5cm thick).

[0048] Furthermore, such as Figure 1 , Figure 3 and Figure 4 As shown, in this embodiment, the separation mechanism 3 includes a first settling chamber 31 and a second settling chamber 32. The lower part of the first settling chamber 31 is connected to the gas phase outlet 27, and the lower part of the second settling chamber 32 is connected to the upper part of the first settling chamber 31. The collection mechanism 4 is connected to the upper part of the second settling chamber 32. A cooling component 33 is provided on the first settling chamber 31, a heating component 34 is provided on the second settling chamber 32, and a filter component 35 is provided inside the second settling chamber 32. The separation mechanism 3 includes multiple settling chambers connected in sequence, which can improve the settling and separation effect of nickel chloride.

[0049] Furthermore, such as Figure 5As shown, in this embodiment, the filter assembly 35 includes a fiber cotton filter layer 351 and multiple fiber cotton filter cartridges 352. The fiber cotton filter layer 351 is disposed within the second settling chamber 32. The bottom end of each fiber cotton filter cartridge 352 is located on the fiber cotton filter layer 351. The first settling chamber 31 communicates with the space below the fiber cotton filter layer 351, and the collection mechanism 4 communicates with the space above the fiber cotton filter layer 351. A sealing cap can be provided on the top of the fiber cotton filter cartridge 352. The side wall of the fiber cotton filter cartridge 352 can be a fiber cotton wall, in which case multiple support rings can be provided inside the filter cartridge 352 for support. Of course, the fiber cotton filter cartridge 352 can also be a fiber cotton column at the center, supported by rigid rods on the outer periphery.

[0050] Furthermore, in this embodiment, the collection mechanism 4 includes a collection chamber 41 with a cooling function and a scraping assembly 42 disposed within the collection chamber 41. The separation mechanism 3 and the exhaust gas recirculation mechanism 5 are both connected to the collection chamber 41. The scraping assembly 42 is a spiral blade rotating wall scraping assembly or a scraper translating wall scraping assembly. The driving component drives the spiral blades to rotate and scrape off the ferric chloride that has cooled to a solid state on the inner wall of the collection chamber 41. The spiral blade rotating wall scraping assembly is as follows... Figure 6 As shown, the device includes a drive unit for rotating the helical blades, a tubular collection chamber 41, and coaxially arranged helical blades within the collection chamber 41. The scraper translation and wall scraping assembly is as follows... Figure 7 As shown, it includes a scraper and a drive unit for driving the scraper to translate. The scraper is arranged to translate within the collection chamber 41. The drive unit drives the scraper to translate and scrape off the ferric chloride that has cooled to a solid state on the inner wall of the collection chamber 41.

[0051] Furthermore, in this embodiment, both the first settling chamber 31 and the second settling chamber 32 are provided with a certain thickness of heat-resistant insulation layer with a temperature resistance of over 1200℃, such as corundum or mullite; the second settling chamber 32 is provided for filtration and separation; the first settling chamber 31 is provided with a cooling component 33, which can cool the first settling chamber 31, reducing the temperature of the high-temperature gas entering the first settling chamber 31 to below 600℃ through air cooling or water cooling; the second settling chamber 32 is provided with a heating component 34, which can be an electric heating tube with an outer protective tube made of quartz glass, corundum, or mullite, or a wound heating element. The electromagnetic induction coil wound around the outside of the second settling chamber 32 requires the heating component 34 to be activated for heating when the gas temperature entering the second settling chamber 32 is below 400℃ or the outlet gas temperature is below 350℃. The second settling chamber 32 is equipped with a filter component 35, which can be filtered by means of corundum or quartz fiber felt, high-temperature ceramic fiber tube, high-temperature ceramic membrane, etc. The materials used cannot react with chlorine gas. Ash discharge devices are installed at the bottom of both the first settling chamber 31 and the second settling chamber 32. The valves used in the ash discharge devices must be high-temperature resistant valves with a temperature resistance of up to 400℃. After the nickel chloride ash is discharged, it needs to be further cooled for easy transportation.

[0052] Furthermore, in this embodiment, a cooling system is provided on the collection chamber 41 to provide sufficient cooling capacity to reduce the temperature of the incoming gas to below 200°C. The cooling method can be jacketed water cooling or air cooling. After the slag is discharged from the collection chamber 41, it is used for the collection and transportation of anhydrous ferric chloride.

[0053] Furthermore, in this embodiment, the reaction chamber 2 is provided with a heat-resistant insulation layer of a certain thickness, with a heat resistance temperature of over 1200℃, such as corundum, mullite, etc.; temperature measuring points are set at different locations in the reaction chamber 2.

[0054] Furthermore, in this embodiment, the hot gas inlet 26 can be connected to a hot gas supply furnace, and hot gas is supplied to the hot gas inlet 26 by the high-temperature gas generated by the hot gas supply furnace (this gas does not react with the iron-nickel alloy 6 and chlorine).

[0055] Example 2:

[0056] The high-temperature chlorination separation method for iron-nickel alloy in this embodiment uses the high-temperature chlorination separation system for iron-nickel alloy from Example 1, and includes the following steps:

[0057] S1. A set amount of iron-nickel alloy is added into the feed exhaust chamber 23 through the feeding mechanism 1, so that the top surface of the iron-nickel alloy 6 in the iron-nickel alloy receiving chamber 22 is close to the gas phase exhaust port 27; hot gas is introduced into the packing chamber 21 through the hot gas inlet 26 to heat the reaction chamber 2.

[0058] S2. When the temperature of the packing chamber 21, the iron-nickel alloy receiving chamber 22 and / or the feed and exhaust chamber 23 reaches the set temperature (e.g., 300°C), stop the hot gas from entering through the hot gas inlet 26; introduce chlorine gas into the packing chamber 21 through the chlorine gas inlet 25, so that the chlorine gas enters the iron-nickel alloy receiving chamber 22 and reacts with the iron-nickel alloy to generate nickel chloride and ferric chloride.

[0059] S3. After each set reaction time, a set amount of iron-nickel alloy is added to the feed exhaust chamber 23 through the feeding mechanism 1 (the amount and number of additions can be adjusted according to the time interval, generally 2-3 times per hour); the gas temperature at the gas phase outlet 27 is controlled at 700℃~1000℃ (if the temperature is too low, the chlorine flow rate is increased, and if the temperature is too high, the chlorine flow rate is decreased) so that both nickel chloride and ferric chloride are in the gas phase; the separation mechanism 3 separates nickel chloride from the nickel chloride and ferric chloride gas flowing into the gas phase outlet 27; the collection mechanism 4 cools the ferric chloride gas received from the separation mechanism 3 into a solid state and then collects it; the tail gas return mechanism 5 transports the tail gas of the collection mechanism 4 to the feeding mechanism 1.

[0060] This high-temperature chlorination separation method for iron-nickel alloys has two main advantages. First, it employs a specially structured reaction chamber 2, where the iron-nickel alloy 6 reacts with chlorine gas to generate nickel chloride and ferric chloride gases. This simplifies the production process, reduces temperature control difficulty, and improves production efficiency and effectiveness. Second, the tail gas containing chlorine from the collection mechanism 4 is returned to the feeding mechanism 1 via the tail gas return mechanism 5. This ensures that the iron-nickel alloy 6 in the feeding mechanism 1 is pre-mixed with chlorine gas before entering the reaction chamber 2, which improves the reaction efficiency and effectiveness within the reaction chamber 2. Consequently, it enhances overall production efficiency and effectiveness while reducing chlorine emissions and minimizing environmental impact.

[0061] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make many possible variations and modifications to the present invention, or modify it into equivalent embodiments, without departing from the scope of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention, without departing from the content of the present invention, should fall within the protection scope of the present invention.

Claims

1. A high-temperature chlorination separation system for iron-nickel alloys, characterized in that: The system includes a feeding mechanism (1), a reaction chamber (2), a separation mechanism (3), a collection mechanism (4), and a tail gas recirculation mechanism (5). The reaction chamber (2) forms a packing cavity (21), an iron-nickel alloy receiving cavity (22), and a feeding and exhaust cavity (23) connected sequentially from bottom to top. The packing cavity (21) is filled with non-reactive particles (24). Gaps are formed between the particles (24) to allow gas and powdery slag to pass through and to impede the passage of the iron-nickel alloy (6). The bottom of the packing cavity (21) is provided with a chlorine inlet (25) and a hot gas inlet (26). The feeding... The mechanism (1) is connected to the feed exhaust chamber (23) and is used to feed the iron-nickel alloy (6) into the feed exhaust chamber (23). The side wall of the feed exhaust chamber (23) is provided with a gas phase outlet (27) for discharging the iron-nickel gas phase. The separation mechanism (3) is connected to the gas phase outlet (27) and is used to separate nickel chloride from the iron-nickel gas phase. The collection mechanism (4) is connected to the separation mechanism (3) and is used to receive the ferric chloride gas from the separation mechanism (3) and collect it after cooling the ferric chloride gas into a solid state. The tail gas return mechanism (5) is connected to the collection mechanism (4) and the feed mechanism (1).

2. The high-temperature chlorination separation system for iron-nickel alloys according to claim 1, characterized in that: The upper and lower parts of the packing cavity (21) are both columnar, and the middle part is conical with a larger upper part and a smaller lower part. The iron-nickel alloy receiving cavity (22), the feed and exhaust cavity (23) and the upper part of the packing cavity (21) are connected to form a columnar space.

3. The high-temperature chlorination separation system for iron-nickel alloys according to claim 1, characterized in that: The chlorine inlet (25) is located in the middle of the packing cavity (21), and the hot gas inlet (26) is located in the lower part of the packing cavity (21).

4. The high-temperature chlorination separation system for iron-nickel alloys according to claim 1, characterized in that: The feeding mechanism (1) includes a feeding pipe (11) and a feeding assembly (12). The feeding pipe (11) is inclined or vertical. The bottom end of the feeding pipe (11) is connected to the feeding end of the feeding assembly (12). The discharge end of the feeding assembly (12) is connected to the feeding exhaust chamber (23). The exhaust gas return mechanism (5) is connected to the collection mechanism (4) and the feeding pipe (11).

5. The high-temperature chlorination separation system for iron-nickel alloys according to claim 4, characterized in that: The top of the reaction chamber (2) is provided with a feed hopper (13), and the discharge end of the feeding assembly (12) is connected to the feed exhaust chamber (23) through the feed hopper (13). The feed hopper (13) is set at an inclination or vertical position, and the feeding assembly (12) is set horizontally.

6. The high-temperature chlorination separation system for iron-nickel alloys according to claim 4, characterized in that: The top end of the feeding pipe (11) is connected to a drying pipe (7) and has an exhaust outlet (8). The bottom of the drying pipe (7) is provided with a feeding valve (71) and the top is provided with a feeding hopper (9). The exhaust gas return mechanism (5) is connected to the bottom of the feeding pipe (11).

7. The high-temperature chlorination separation system for iron-nickel alloys according to any one of claims 1 to 6, characterized in that: The separation mechanism (3) includes a first settling chamber (31) and a second settling chamber (32). The lower part of the first settling chamber (31) is connected to the gas phase outlet (27), and the lower part of the second settling chamber (32) is connected to the upper part of the first settling chamber (31). The collection mechanism (4) is connected to the upper part of the second settling chamber (32). A cooling component (33) is provided on the first settling chamber (31), a heating component (34) is provided on the second settling chamber (32), and a filter component (35) is provided inside the second settling chamber (32).

8. The high-temperature chlorination separation system for iron-nickel alloys according to claim 7, characterized in that: The filter assembly (35) includes a fiber cotton filter layer (351) and a plurality of fiber cotton filter cylinders (352). The fiber cotton filter layer (351) is disposed in the second settling chamber (32). The bottom end of each fiber cotton filter cylinder (352) is disposed on the fiber cotton filter layer (351). The first settling chamber (31) is connected to the space below the fiber cotton filter layer (351). The collection mechanism (4) is connected to the space above the fiber cotton filter layer (351).

9. The high-temperature chlorination separation system for iron-nickel alloys according to any one of claims 1 to 6, characterized in that: The collection mechanism (4) includes a collection chamber (41) with a cooling function and a scraping assembly (42) located in the collection chamber (41). The separation mechanism (3) and the exhaust gas recirculation mechanism (5) are both connected to the collection chamber (41). The scraping assembly (42) is a spiral blade rotating wall scraping assembly or a scraper translating wall scraping assembly.

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