Device for separating iron from nickel-iron alloy

Abstract

The utility model provides a device for separating iron from nickel-iron alloy, and relates to the field of resource utilization. In the device, a roasting furnace comprises a furnace body and a first chlorine gas inlet, the furnace body is provided with a containing cavity for containing the ferro-nickel alloy, and the first chlorine gas inlet is communicated with the containing cavity; the separating mechanism is communicated with the accommodating cavity and is used for separating ferrous chloride melt generated by the furnace body; the communicating pipe communicates with the separating mechanism. The chlorination reaction chamber is provided with a second chlorine gas inlet, and the chlorination reaction chamber is communicated with the communicating pipe. The condensation mechanism is communicated with the chlorination reaction chamber and is used for condensing ferric chloride gas generated by the chlorination reaction chamber to generate a solid ferric trichloride product; and the collecting mechanism is positioned below the condensing mechanism and is used for collecting solid ferric trichloride products. According to the device, iron in the alloy is preferentially chlorinated by controlling the chlorination conditions and is converted into molten ferrous chloride, the equipment structure is simple, the operation is simple, the technological process is short, and the quality of obtained ferric chloride is high.

Description

Technical Field

[0001] The utility model relates to the field of resource utilization, in particular to a device for separating iron from nickel-iron alloy. Background Art

[0002] At present, hydrometallurgical technology is widely used to separate nickel and iron from nickel-iron alloys, which includes leaching with sulfuric acid, followed by separation through evaporation crystallization, oxidation-reduction and other steps. The specific principle is to first use reagents to wet-leach the nickel-iron alloy to destroy the dense structure of the nickel-iron alloy, while allowing the nickel, iron and other elements in the alloy to enter the solution, and then the solution is purified and partially extracted for valuable metals. Therefore, the corresponding iron separation device has a complex equipment structure due to its long process. Utility Model Content

[0003] The main purpose of the utility model is to provide a device for separating iron from nickel-iron alloy, so as to solve the technical problem of the complicated equipment structure of the existing device for separating iron from nickel-iron alloy.

[0004] To achieve the above object, the utility model provides a device for separating iron from nickel-iron alloy, comprising:

[0005] The roasting furnace comprises a furnace body and a first chlorine gas inlet, wherein the furnace body has a containing cavity for containing the nickel-iron alloy, and the first chlorine gas inlet is communicated with the containing cavity.

[0006] A separation mechanism is communicated with the accommodating chamber and separates the ferrous chloride melt generated by the furnace body.

[0007] A connecting pipe is connected to the separation mechanism and is used for conveying the ferrous chloride melt.

[0008] The chlorination reaction chamber has a second chlorine gas inlet, and the chlorination reaction chamber is connected with the connecting pipe to receive the ferrous chloride melt.

[0009] The condensation mechanism is communicated with the chlorination reaction chamber and condenses the ferric chloride gas produced in the chlorination reaction chamber to produce a solid ferric chloride product.

[0010] The collecting mechanism is located below the condensing mechanism and collects the solid ferric chloride product.

[0011] According to an embodiment of the present application, the roasting furnace further includes a feed assembly, and the feed assembly is connected to the furnace body.

[0012] According to an embodiment of the present application, a side of the chlorination reaction chamber away from the connecting pipe has a gaseous ferric chloride ascending channel, and the gaseous ferric chloride ascending channel is connected to the condensing mechanism.

[0013] According to an embodiment of the present application, the gaseous ferric chloride rising channel is cylindrical, the height of the gaseous ferric chloride rising channel is 1 / 3 to 1 / 2 of the height of the furnace body, and the diameter is 1.1 to 1.2 times the diameter of the furnace body.

[0014] According to an embodiment of the present application, the condensation mechanism includes a condensation chamber and a temperature control component, and the temperature control component is wrapped around the top and the outer sides of the condensation chamber; the condensation chamber is connected to the gaseous ferric chloride rising channel.

[0015] According to an embodiment of the present application, the separation mechanism includes a filter plate embedded in the bottom of the furnace body, and the pore size of the filter plate is 0.1 to 0.2 mm.

[0016] According to an embodiment of the present application, the device for separating iron from nickel-iron alloy also includes a melt collecting tank, which is connected to the furnace body and communicated with the accommodating cavity through the filter plate; the connecting pipe is communicated with the melt collecting tank.

[0017] According to an embodiment of the present application, the chlorination reaction chamber is located below the furnace body; a partial area of ​​the connecting pipe is bent to form a communicating vessel; the diameter of the communicating vessel is 1 / 8 of the diameter of the furnace body; the first end of the communicating vessel is connected to the melt collection tank, and the second end is connected to the chlorination reaction chamber.

[0018] According to an embodiment of the present application, a partial area of ​​the connecting pipe forms a horizontal section and a vertical section distributed in sequence, the horizontal section is connected to and perpendicular to the second end, and the vertical section is parallel to the second end and connected to the chlorination reaction chamber.

[0019] According to an embodiment of the present application, the collecting mechanism is a conical structure, and the diameter of the conical structure matches the bottom of the condensing mechanism.

[0020] In the above-mentioned device for separating iron from nickel-iron alloy, by controlling the chlorination conditions, the preferential chlorination of iron in the alloy is achieved, and it is converted into molten ferrous chloride. Ferrous chloride is converted into gaseous ferric chloride for volatilization, and ferric chloride is obtained by cooling. The element behavior of iron in the alloy is that the solid alloy is converted into liquid ferrous chloride, and then into gaseous ferric chloride, which realizes the continuity of the process. And in the process of molten ferrous chloride being gasified by chlorine, the reaction can be well controlled, and then high-quality ferric chloride can be prepared. The above-mentioned device for separating iron from nickel-iron alloy has simple equipment structure, simple operation, short process flow, and high-quality ferric chloride. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0022] Figure 1 is a flow chart of an apparatus for separating iron from nickel-iron alloy according to an embodiment of the present application;

[0023] Figure 2 It is a schematic structural diagram of an apparatus for separating iron from nickel-iron alloy according to one embodiment of the present application.

[0024] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with the implementation methods and with reference to the accompanying drawings.

[0025] 100, roasting furnace; 200, separation mechanism; 300, chlorination reaction chamber; 400, condensation mechanism; 500, collection mechanism; 600, melt collection tank; 700, connecting pipe;

[0026] 110, furnace body; 120, feed assembly; 130, temperature control assembly; 140, slag outlet; 150, first chlorine gas inlet;

[0027] 310, chlorination oxidation reaction chamber; 320, gaseous ferric chloride ascending channel; 330, second chlorine gas inlet;

[0028] 410, condensation chamber; 420, temperature control component;

[0029] 510, discharge switch;

[0030] 710. Connecting vessel. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] It should be noted that all directional indications (such as up, down, etc.) in the implementation mode of the utility model are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0033] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features.

[0034] Furthermore, the technical solutions between the various implementation modes of the present invention may be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in the field. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0035] The present application also provides a device for separating iron from nickel-iron alloy, see Figure 2 , including a roasting furnace 100, a separation mechanism 200, a chlorination reaction chamber 300, a condensation mechanism 400 and a collection mechanism 500.

[0036] The roasting furnace 100 includes a furnace body 110 and a first chlorine gas inlet 150. The furnace body 110 has a receiving cavity for receiving the nickel-iron alloy, and the first chlorine gas inlet 150 is connected to the receiving cavity, and the mass of the chlorine gas introduced is 0.8 to 1.5 times the mass of the nickel-iron alloy. The roasting temperature in the furnace body 110 is 500 to 850°C.

[0037] The separation mechanism 200 is communicated with the accommodating chamber to separate the ferrous chloride melt generated by the furnace body 110 .

[0038] The connecting pipe 700 is connected to the separation mechanism 200 and is used to transport the ferrous chloride melt.

[0039] The chlorination reaction chamber 300 has a second chlorine gas inlet 330 . The chlorination reaction chamber 300 is communicated with the separation mechanism 200 to receive the ferrous chloride melt.

[0040] The condensation mechanism 400 is in communication with the chlorination reaction chamber 300, and condenses the ferric chloride gas produced in the chlorination reaction chamber 300 to produce a solid ferric chloride product.

[0041] The collecting mechanism 500 is located below the condensing mechanism 400 and collects the solid ferric chloride product.

[0042] The specific shape of the roasting furnace 100 is not limited, such as cylindrical, square, etc.

[0043] The separation mechanism 200 may be provided integrally with the furnace body 110 or separately.

[0044] Taking an integrated configuration as an example, in some embodiments, the separation mechanism 200 includes a filter plate embedded in the bottom of the furnace body 110 , and the pore size of the filter plate is 0.1 to 0.2 mm.

[0045] The filter plate is embedded in the furnace body 110, and its size is completely fitted with the bottom of the furnace body 110. The filter plate becomes a part of the bottom of the furnace body 110. The filter plate has filter holes. In this way, the ferrous chloride melt generated by the reaction flows directly through the filter holes to the next process. Exemplarily, the pore size of the filter plate is 0.1-0.2 mm.

[0046] The connecting pipe 700 is a pipeline structure, such as a heat-resistant metal pipe or a heat-resistant polymer pipe. The ferrous chloride melt separated by the separation mechanism 200 enters the chlorination reaction chamber 300 along the connecting pipe 700. The presence of the ferrous chloride melt in the connecting pipe 700 reduces or prevents the chlorine gas in the chlorination reaction chamber 300 from entering the furnace body 110 along the connecting pipe 700.

[0047] The method for separating iron from nickel-iron alloy is described in detail in the following sections. Figure 1 , including the following steps:

[0048] S100: roasting the nickel-iron alloy in a chlorine atmosphere to obtain a ferrous chloride melt and solid slag, and separating the ferrous chloride melt, wherein the mass of the chlorine is 0.8 to 1.5 times the mass of the nickel-iron alloy, and the roasting temperature is 500 to 850°C.

[0049] The utility model provides a device for separating iron from nickel-iron alloy, and the overall idea is as follows: by controlling the chlorination conditions, the preferential chlorination of iron in the alloy is achieved, and the molten ferrous chloride is converted. The unreacted nickel-iron alloy and the solid slag obtained by the reaction are both solid, and the molten ferrous chloride is liquid, which is easy to separate from the solid, such as filtering, centrifugation, etc. In some specific embodiments, a filter hole is set at the bottom of the reaction container (such as a roasting furnace) of the nickel-iron alloy, so that the molten ferrous chloride is filtered out from the bottom of the container.

[0050] In the subsequent step, chlorine gas is introduced into the obtained molten ferrous chloride to convert the ferrous chloride into gaseous ferric chloride for volatilization. The gaseous ferric chloride is condensed to obtain a solid ferric chloride product, thereby completing the operation of separating iron from the nickel-iron alloy.

[0051] The nickel-iron alloy of the embodiment of the present application is an alloy whose main components are nickel and iron, and is a smelting intermediate. In some embodiments, the nickel-iron alloy of the embodiment of the present application is a nickel-iron alloy obtained by pyrometallurgical smelting of laterite nickel ore, such as a nickel-iron alloy obtained by RK-EF process, rotary kiln direct reduction-magnetic separation process, rotary hearth furnace-melting furnace process. In some specific embodiments, the composition of the nickel-iron alloy is shown in Table 1.

[0052] Table 1: Chemical composition of nickel-iron alloy (wt%)

[0053]

[0054] In step S100, the mass ratio of the quality of chlorine to the nickel-iron alloy and the roasting temperature are passed to achieve the preferential chlorination of iron in the alloy. When the roasting temperature and the chlorine content are too high, nickel and iron both generate chlorides, nickel generates gaseous nickel chloride, and iron generates gaseous ferrous chloride or gaseous ferric chloride, thereby failing to achieve the effect of solid-liquid separation. When the roasting temperature and the chlorine content are too low, the ferric chloride generated by iron is less or does not generate ferric chloride, and the effect of solid-liquid separation is equally failing to achieve.

[0055] The specific roasting time is not specifically required, and is based on the generation of ferrous chloride melt. In particular, in some embodiments, a continuous device for separating iron from ferronickel is used. The total amount of ferronickel is relatively large, and step S100 is a process of sustained reaction, in which ferronickel is added in a large amount or continuously added to ferronickel, and in the roasting process, ferrous chloride melt and solid slag are continuously generated. As the reaction proceeds, the solid slag that the reaction is completed can also be separated.

[0056] S200: Chlorine gas is introduced into the ferrous chloride melt to carry out a chlorination reaction, so that the ferrous chloride melt is converted into ferric chloride gas.

[0057] In the process of molten ferrous chloride being gasified by chlorine, the reaction can be well controlled, and high-quality ferric chloride can be prepared. For example, ferrous chloride melt is placed in a chlorination reaction chamber, and chlorine is introduced into the molten ferrous chloride to cause a chlorination reaction between the two.

[0058] For example, if an iron-containing alloy is treated in one step to convert iron into ferric chloride, it is difficult to continue the one-step treatment. For example, when there is only a small amount of alloy in the later stage of the reaction, it is difficult for the introduced chlorine to contact the alloy, resulting in low utilization rate of chlorine.

[0059] After adopting the step-by-step treatment, one furnace is specifically responsible for the production of ferrous chloride, that is, when one batch of alloy has not yet completely reacted, the second batch of materials is added, and then the third batch of materials. The addition of materials can not only ensure the formation of ferrous chloride, but also ensure the contact efficiency between chlorine and alloy due to the high material content.

[0060] Moreover, after adopting the step-by-step method, the heat release of the reaction between ferrous chloride and chlorine is much lower than that of the reaction between chlorine and iron to generate ferrous chloride, and almost no heat is released. Therefore, the temperature of this step is easy to control, and the temperature can be controlled by using an external heat source.

[0061] In addition, during the chlorination process, iron is directly chlorinated into ferric chloride, which requires stronger chlorination conditions. See the analysis in part S100, which can easily lead to the chlorination of other elements in the alloy. In addition, during the chlorination process, iron is continuously volatilized, resulting in constantly changing reaction conditions, making it impossible to obtain relatively stable reaction conditions, which is not conducive to large-scale industrial production.

[0062] S300: Condensing the ferric chloride gas to obtain a solid ferric chloride product.

[0063] The boiling point of FeCl3 is 316℃. When the ferric chloride gas condenses below the boiling point, solid ferric chloride product is generated, which is easy to collect and store. During the entire separation process, the element behavior of iron in the alloy is to transform from solid alloy to liquid ferrous chloride, and then to gaseous ferric chloride, realizing the continuity of the process.

[0064] In the above-mentioned device for separating iron from nickel-iron alloy, by controlling the chlorination conditions, the preferential chlorination of iron in the alloy is achieved, and it is converted into molten ferrous chloride. Ferrous chloride is converted into gaseous ferric chloride for volatilization, and ferric chloride is obtained by cooling. The element behavior of iron in the alloy is that the solid alloy is converted into liquid ferrous chloride, and then into gaseous ferric chloride, which realizes the continuity of the process. And in the process of molten ferrous chloride being gasified by chlorine, the reaction can be well controlled, and then high-quality ferric chloride can be prepared. The above-mentioned device for separating iron from nickel-iron alloy has simple equipment structure, simple operation, short process flow, and high-quality ferric chloride.

[0065] In some embodiments, see Figure 2 , the furnace body 110 is cylindrical, and the ratio of the height to the diameter of the furnace body 110 is (8-20): 1. In this case, the nickel-iron alloy raw material is piled high, and the height area of ​​the nickel-iron alloy for chlorination reaction can be more accurately controlled, such as the chlorination reaction at the bottom of the roasting furnace 100 for roasting and heating, which has the effects of separating the ferrous chloride melt, preventing chlorine from escaping, and reducing the subsequent ferric chloride gas to ferrous chloride melt. In addition, it is also beneficial for the iron in the alloy to flow continuously into the next reactor in the form of molten ferrous chloride.

[0066] In some embodiments, see Figure 2 The first chlorine gas inlet 150 is located at the bottom of the furnace body 110. Since the density of chlorine gas is greater than that of air, the unreacted chlorine gas tends to stay at the bottom of the reaction container and is not easy to overflow upwards to cause chlorine gas waste and environmental pollution.

[0067] Moreover, chlorine gas is introduced from the bottom of the nickel-iron alloy, and when the roasting and heating area is also at the bottom, ferrous chloride melt is generated at the bottom, so it is easy to separate. In addition, in this case, if the subsequent ferric chloride gas enters the device where the nickel-iron alloy is roasted, it will also react with the unreacted nickel-iron alloy above and be reduced to ferrous chloride melt.

[0068] In some embodiments, see Figure 2 There are two first chlorine gas inlets 150, which are located on both sides of the roasting furnace 100. In this embodiment, the first chlorine gas inlets 150 are symmetrically distributed, which is conducive to uniform distribution of chlorine.

[0069] In some embodiments, a feed assembly 120 is provided on the top of the furnace body 110 , such as a funnel-shaped structure.

[0070] In some embodiments, see Figure 2 The roasting furnace 100 further includes a temperature control component 130. Exemplarily, the temperature control component 130 is wrapped around the outside of the furnace body 110, and the wrapped height is 1 / 4 to 1 / 2 of the height of the furnace body 110. The temperature control component 130 is an electric temperature control component 130, which is realized by electric heating coupled with air condensation, that is, electric heating is turned on when the temperature is increased, and air condensation is turned on when the temperature is decreased.

[0071] The temperature control component 130 is arranged at the bottom, which is conducive to the nickel-iron alloy reaction starting from the bottom, so it has the effects of separating the ferrous chloride melt, preventing chlorine from escaping easily, and subsequently reducing the ferric chloride gas to the ferrous chloride melt.

[0072] In some embodiments, see Figure 2 The roasting furnace 100 further includes a slag outlet 140 . The slag outlet 140 is located at 1 / 10 to 1 / 8 of the height of the furnace body 110 measured from the bottom. The solid slag obtained by the reaction is discharged from the slag outlet 140 .

[0073] In some embodiments, see Figure 2 The device for separating iron from the nickel-iron alloy further includes a melt collecting tank 600, which is connected to the furnace body 110 and communicates with the accommodating cavity through the filter plate. The melt collecting tank 600 is located at the lower end of the filter plate and communicates with the filter plate. Exemplarily, the melt collecting tank 600 is in a cone shape. The upper opening of the melt collecting tank 600 matches and is fixedly connected to the bottom of the furnace body 110.

[0074] In some embodiments, see Figure 2 The chlorination reaction chamber 300 includes a chlorination oxidation reaction chamber 310 and the aforementioned second chlorine gas inlet 330 .

[0075] Exemplarily, the chlorination oxidation reaction chamber 310 is a rectangular parallelepiped, such as length: width: height of 10:3:4 to 10:3:6. Exemplarily, the second chlorine gas inlet 330 is three chlorine gas inlet pipes, which are evenly distributed on the center line of the side, and the highest inlet pipe is distributed at 1 / 2 of the height of the chlorination oxidation reaction chamber 310 from the bottom of the chlorination oxidation reaction chamber 310, and the lowest inlet pipe is flush with the bottom of the chlorination oxidation reaction chamber 310. The second chlorine gas inlet 330 and the gaseous ferric chloride ascending channel 320 are respectively distributed on both sides of the chlorination oxidation reaction chamber 310, and the second chlorine gas inlet 330 is located in the lower side area of ​​the chlorination oxidation reaction chamber 310 and is connected to the side.

[0076] In some embodiments, see Figure 2 The chlorination reaction chamber 300 is located below the furnace body 110 .

[0077] In some embodiments, a portion of the communicating tube 700 is bent to form a communicating vessel 710. The diameter of the communicating vessel 710 is 1 / 8 of the diameter of the furnace body 110. One end (first end) of the communicating vessel 710 is connected to the melt collecting tank 600, and the other end (second end) is connected to the chlorination reaction chamber 300.

[0078] The communicating vessel 710 is located below the furnace body 110. Under the action of gravity, the ferrous chloride melt in the melt collecting tank 600 enters the second end from the first end of the communicating vessel 710, and then enters the chlorination oxidation reaction chamber 310. The vertical height of the pipe body portion between the first end and the second end is relatively short, so there is always a part of the ferrous chloride melt, which can act as a check valve, and is unidirectional, allowing only the ferrous chloride melt to enter the chlorination reaction chamber 300. The gaseous ferric chloride generated in the chlorination reaction chamber 300 or the chlorine gas introduced therein cannot enter the melt collecting tank 600 and enter the furnace body 110 due to the presence of the ferrous chloride melt at the bottom of the communicating vessel 710. For example, the communicating vessel 710 is a U-shaped communicating vessel 710.

[0079] In some embodiments, a partial area of ​​the connecting pipe 700 forms a horizontal section and a vertical section distributed in sequence, the horizontal section is connected to and perpendicular to the second end, and the vertical section is parallel to the second end and connected to the chlorination reaction chamber.

[0080] The horizontal section and the vertical section form an inverted L-shaped pipeline. This structure is more conducive to the accumulation of ferrous chloride melt at the bottom of the connecting vessel 710 when less or no ferrous chloride melt is produced in the roasting furnace, thereby enhancing the anti-return effect.

[0081] In some embodiments, see Figure 2The chlorination reaction chamber 300 has a gaseous ferric chloride rising channel 320 on one side away from the communicating vessel 710 , and the gaseous ferric chloride rising channel 320 is connected to the condensing mechanism 400 .

[0082] Exemplarily, one end of the gaseous ferric chloride ascending channel 320 is located at the top of the chlorination oxidation reaction chamber 310 and communicated with the top, and the other end is communicated with the condensation mechanism 400. The second chlorine gas inlet 330 and the gaseous ferric chloride ascending channel 320 are respectively distributed on both sides of the chlorination oxidation reaction chamber 310.

[0083] Exemplarily, the gaseous ferric chloride ascending channel 320 is cylindrical, with a height of 1 / 3 to 1 / 2 of the furnace body 110 and a diameter of 1.1 to 1.2 times of the furnace body 110 .

[0084] In some embodiments, see Figure 2 The condensation mechanism 400 includes a condensation chamber 410 and a temperature control assembly 420. Exemplarily, the condensation mechanism 400 is cylindrical, with a height of 1 / 3 to 1 / 2 of the gaseous ferric chloride ascending channel 320 and a diameter of 5 to 10 times that of the gaseous ferric chloride ascending channel 320.

[0085] The temperature control component 420 is wrapped around the top and the outer sides of the condensation chamber 410, and the temperature is controlled by a water-cooled coupled heating rod for temperature regulation.

[0086] The collecting mechanism 500 is located at the bottom of the condensing mechanism 400 and is completely connected at the bottom. It is conical in shape. The diameter of the cone bottom is consistent with the condensing chamber 410. The cone height is 1.1 to 1.2 times that of the condensing chamber 410. The discharge switch 510 is located at the bottom of the collecting mechanism 500 and is connected to the collecting mechanism 500.

[0087] The above technical solutions of the present invention are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A device for separating iron from nickel-iron alloy, characterized in that include: A roasting furnace, comprising a furnace body and a first chlorine gas inlet, wherein the furnace body has a containing cavity for containing the nickel-iron alloy, and the first chlorine gas inlet is connected to the containing cavity; A separation mechanism, connected to the accommodating chamber, for separating the ferrous chloride melt generated by the furnace body; A connecting pipe, connected to the separation mechanism, for conveying the ferrous chloride melt; A chlorination reaction chamber has a second chlorine gas inlet, the chlorination reaction chamber is connected to the connecting pipe, and receives the ferrous chloride melt; A condensation mechanism is communicated with the chlorination reaction chamber and condenses the ferric chloride gas produced in the chlorination reaction chamber to produce a solid ferric chloride product; The collecting mechanism is located below the condensing mechanism and collects the solid ferric chloride product.

2. The device for separating iron from nickel-iron alloy according to claim 1, characterized in that The roasting furnace further comprises a feed assembly, wherein the feed assembly is communicated with the furnace body.

3. The device for separating iron from nickel-iron alloy according to claim 1, characterized in that A gaseous ferric chloride ascending passage is provided on one side of the chlorination reaction chamber away from the connecting pipe, and the gaseous ferric chloride ascending passage is connected with the condensing mechanism.

4. The device for separating iron from nickel-iron alloy according to claim 3, characterized in that The gaseous ferric chloride ascending channel is cylindrical, the height of the gaseous ferric chloride ascending channel is 1 / 3 to 1 / 2 of the height of the furnace body, and the diameter is 1.1 to 1.2 times the diameter of the furnace body.

5. The device for separating iron from nickel-iron alloy according to claim 3, characterized in that The condensation mechanism comprises a condensation chamber and a temperature control component, wherein the temperature control component is wrapped around the top and the outer sides of the condensation chamber; the condensation chamber is communicated with the gaseous ferric chloride ascending channel.

6. The device for separating iron from nickel-iron alloy according to claim 1, characterized in that The separation mechanism comprises a filter plate embedded in the bottom of the furnace body, and the pore size of the filter plate is 0.1-0.2 mm.

7. The device for separating iron from nickel-iron alloy according to claim 6, characterized in that The device for separating iron from nickel-iron alloy further comprises a melt collecting tank, which is connected to the furnace body and communicated with the accommodating cavity through the filter plate; the connecting pipe is communicated with the melt collecting tank.

8. The device for separating iron from nickel-iron alloy according to claim 7, characterized in that The chlorination reaction chamber is located below the furnace body; A partial area of ​​the communicating pipe is bent to form a communicating vessel; the diameter of the communicating vessel is 1 / 8 of the diameter of the furnace body; the first end of the communicating vessel is connected to the melt collecting tank, and the second end is connected to the chlorination reaction chamber.

9. The device for separating iron from nickel-iron alloy according to claim 8, characterized in that A partial area of ​​the connecting pipe forms a horizontal section and a vertical section distributed in sequence, the horizontal section is connected to and perpendicular to the second end, and the vertical section is parallel to the second end and connected to the chlorination reaction chamber.

10. The device for separating iron from nickel-iron alloy according to any one of claims 1 to 9, characterized in that: The collecting mechanism is a conical structure, and the diameter of the conical structure matches the bottom of the condensing mechanism.

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