A horizontal reactor device system for continuous leaching of laterite nickel ore by hydrochloric acid under normal pressure

Abstract

This invention provides a horizontal reactor system for continuous atmospheric pressure leaching of lateritic nickel ore with hydrochloric acid, comprising a reactor body and a stirring assembly. Several partition plates inside the reactor body are arranged in parallel to divide the reactor into several leaching chambers. A discharge port is located at the bottom center of each leaching chamber. Two chamfered structures are formed between the bottom edges of adjacent leaching chambers and the bottom edges of the partition plates. Each chamfered structure has a communication port near the bottom edge of the leaching chamber. A stirring assembly is correspondingly installed in each leaching chamber. The stirring assembly includes a stirring shaft, one end of which is inserted into the top of the leaching chamber. A first stirring blade and a second stirring blade are arranged in parallel on the other end of the stirring shaft. The structures of the first and second stirring blades are different. This horizontal reactor system effectively improves the mixing uniformity and leaching reaction rate of lateritic nickel ore with hydrochloric acid, reduces energy consumption, and enhances the overall ease of operation.

Description

Technical Field

[0001] This utility model belongs to the field of leaching technology and relates to a horizontal reaction vessel system for continuous hydrochloric acid leaching of laterite nickel ore at atmospheric pressure. Background Technology

[0002] Lateritic nickel ore, as an important nickel resource, suffers from low grade and complex mineral composition. Traditional pyrometallurgical processes are energy-intensive and produce significant carbon emissions, making it difficult to meet the demands of green metallurgy. Hydrochloric acid atmospheric leaching, a process in hydrometallurgy, offers advantages such as low reaction temperature and media recycling, making it a promising alternative to sulfuric acid pressure leaching and a primary method for processing lateritic nickel ore. However, existing hydrochloric acid leaching methods, using vertical reactors and operating intermittently, suffer from uneven mixing, limited agitation, inconvenient unloading and cleaning, and insufficient continuity, affecting leaching efficiency and stability. In contrast, continuous horizontal reactions offer advantages such as high processing efficiency, ease of operation, and suitability for large-scale production. Therefore, there is an urgent need to develop a hydrochloric acid atmospheric leaching system for lateritic nickel ore with optimized structure, thorough mixing, convenient discharge, and suitability for continuous operation. Utility Model Content

[0003] The purpose of this invention is to overcome the defects of existing atmospheric pressure hydrochloric acid leaching equipment for laterite nickel ore, such as uneven mixing, low stirring efficiency, inconvenient unloading and cleaning, and insufficient continuous operation. It provides a horizontal reactor system for continuous atmospheric pressure leaching of laterite nickel ore with hydrochloric acid, which has a reasonable structure, excellent mixing effect, convenient discharge, and is suitable for continuous production.

[0004] To achieve this objective, the present invention adopts the following technical solution:

[0005] This utility model provides a horizontal reactor system for continuous hydrochloric acid leaching of laterite nickel ore under normal pressure. The horizontal reactor system includes a reactor body and a stirring assembly.

[0006] The reactor body is provided with several partition plates inside, which are arranged in parallel to divide the reactor body into several leaching chambers. A discharge port is provided in the middle of the bottom of each leaching chamber. Two chamfer structures are formed between the bottom edge of adjacent leaching chambers and the bottom edge of the partition plates. A connecting port is provided on each of the two chamfer structures near the bottom edge of the leaching chamber. The connecting port is used to connect adjacent leaching chambers. Each leaching chamber is provided with a corresponding stirring assembly.

[0007] The stirring assembly includes a stirring shaft, a first stirring blade, and a second stirring blade. One end of the stirring shaft is inserted into the top of the leaching chamber for connecting an external stirring motor. The other end of the stirring shaft is provided with the first stirring blade and the second stirring blade arranged in parallel along a direction away from the bottom of the leaching chamber.

[0008] The structure of the first impeller is different from that of the second impeller.

[0009] Furthermore, the reactor body is a horizontal cylindrical structure.

[0010] Furthermore, the inner diameter of the reactor body is D, the length is L, and the length-to-diameter ratio L / D is 1 to 1.2.

[0011] Furthermore, the chamfer angle θ of the chamfered structure is 30° to 90°.

[0012] Furthermore, the radius of the chamfered structure is R, the height of the spacer is H, and the ratio of R / H is 0.1 to 0.4.

[0013] Furthermore, the height of the connecting opening is h, and the ratio h / R to the radius R of the chamfered structure is 0.1 to 0.4.

[0014] Furthermore, the spacer plate is provided in three to five parts.

[0015] Furthermore, the ratio H / D of the height H of the spacer plate to the inner diameter D of the reactor body is 0.4 to 0.8.

[0016] Furthermore, the first impeller is a straight-blade turbine impeller.

[0017] Furthermore, the second impeller is an open turbine impeller.

[0018] Furthermore, the diameter d of the straight-blade turbine impeller is 0.3D to 0.4D.

[0019] Furthermore, the blades of the open turbine impeller are three-bladed, four-bladed, or six-bladed.

[0020] Furthermore, when the open turbine impeller has three blades, the blade angle is 50° to 70°, and the blade diameter d up The value ranges from 0.15D to 0.35D.

[0021] Furthermore, when the open turbine impeller has four blades, the blade angle is 35° to 55°, and the blade diameter d up The value ranges from 0.15D to 0.35D.

[0022] Furthermore, when the open turbine impeller has six blades, the blade angle is 15° to 35°, and the blade diameter d up The value ranges from 0.15D to 0.35D.

[0023] Furthermore, the distance between the first stirring impeller and the second stirring impeller is C2, where C2 is 0.5d to 1.5d.

[0024] Furthermore, the distance between the first stirring paddle and the inner bottom of the leaching chamber is C1, where C1 is 0.29d to 0.85d.

[0025] The system refers to an equipment system, device system, or production device.

[0026] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0027] The chamfered structure in this invention avoids dead corners and vortices, effectively improving the uniformity of slurry mixing. The combined design of the upper and lower two-layer stirring paddles takes into account both the solid-liquid suspension at the bottom and the circulation of the liquid at the top, achieving efficient mixing throughout the entire space. The connecting port is used to allow the slurry to flow smoothly between adjacent leaching chambers, and facilitates the collection of slurry and residue along the chamfer before finally being discharged through the discharge port at the bottom of the leaching chamber, achieving more thorough discharge and equipment cleaning. The horizontal structure combined with the guiding effect of the partition plate allows the slurry to flow sequentially in different leaching chambers, while the upper solution remains interconnected, thereby controlling the flow path and residence time of the slurry, making the mixing more uniform, significantly improving the local mixing effect, and increasing the slurry mass transfer efficiency and leaching rate. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 A schematic diagram of a horizontal reactor system for continuous hydrochloric acid leaching of laterite nickel ore at atmospheric pressure, provided as a specific embodiment of this utility model;

[0030] Figure 2 A front view of the four-bladed open turbine impeller provided in Example 1;

[0031] Figure 3 A side view of the four-bladed open turbine impeller provided in Example 1;

[0032] Figure 4 This is a front view of the six-bladed open turbine impeller provided in Example 2;

[0033] Figure 5 A side view of the six-bladed open turbine impeller provided in Example 2;

[0034] Figure 6A front view of the three-bladed open turbine impeller provided in Example 3;

[0035] Figure 7 A side view of the three-bladed open turbine impeller provided in Example 3;

[0036] Wherein, 1-Reaction vessel body; 2-Baffle plate; 3-Stirring assembly; 4-Discharge port; 5-Chamfered structure; 6-Connecting port;

[0037] 31-Stirring shaft; 32-Second stirring paddle; 33-First stirring paddle. Detailed Implementation

[0038] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0039] It should be understood that in the description of this utility model, the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used solely for the convenience of describing this utility model and for 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. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0040] It should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "set," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0041] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0042] In one specific embodiment, this utility model provides a horizontal reaction vessel system for continuous hydrochloric acid leaching of laterite nickel ore at atmospheric pressure, such as... Figure 1 As shown, the horizontal reactor system includes a reactor body 1 and a stirring assembly 3. The reactor body 1 has several partition plates 2 arranged in parallel, dividing the interior into several leaching chambers. A discharge port 4 is located at the bottom center of each leaching chamber. Two chamfered structures 5 are formed between the bottom edges of adjacent leaching chambers and the bottom edges of the partition plates 2. Each chamfered structure 5 has a connecting port 6 near the bottom edge of the leaching chamber, used to connect adjacent leaching chambers. Each leaching chamber contains a corresponding stirring assembly 3. The stirring assembly 3 includes a stirring shaft 31, a first stirring paddle 33, and a second stirring paddle 32. One end of the stirring shaft 31 is inserted into the top of the leaching chamber for connecting an external stirring motor. The other end of the stirring shaft 31 has the first stirring paddle 33 and the second stirring paddle 32 arranged in parallel along a direction away from the bottom of the leaching chamber. The structures of the first stirring paddle 33 and the second stirring paddle 32 are different.

[0043] The chamfered structure 5 in this invention extends from both sides of the leaching chamber and the partition plate 2 to the bottom, preventing vortices or dead angles in the liquid flow, thereby improving the circulation and mixing effect of the slurry in the tank. The connecting port 6 and the discharge port 4 are respectively located at the lowest point of the chamfered structure 5 and the bottom of the leaching chamber. The connecting port 6 is used to ensure smooth flow of slurry between adjacent leaching chambers and facilitates the collection of slurry and residue along the chamfer before finally being discharged through the discharge port 4 at the bottom of the reactor body 1, achieving more thorough discharge and equipment cleaning. The first stirring paddle 33 is a straight-blade turbine stirring paddle, used to enhance the suspension and shearing capacity of the slurry at the bottom. The second stirring paddle 32 is an open turbine stirring paddle, used to improve the circulation and gas-liquid dispersion effect in the liquid surface area. The combination of the two types of stirring paddles can give full play to their respective advantages and achieve efficient mixing in the entire space. In summary, the horizontal reactor device system of this invention can effectively improve the mixing uniformity and leaching reaction rate, reduce energy consumption, and improve the convenience of equipment operation.

[0044] It should be noted that the specific materials of the reactor body 1, the stirring assembly 3 and the partition plate 2 are not specifically limited in this utility model, and those skilled in the art can make appropriate selections according to the actual situation.

[0045] It should be noted that the "several" in this utility model can specifically be 1, 2, 3, 4, 5, 6, etc., and will not be listed exhaustively here. Those skilled in the art can make an adaptive selection according to the actual situation.

[0046] It should be noted that in this utility model, the stirring shaft 31 is inserted into the inner top of the leaching chamber and is located in the middle of the inner top of the leaching chamber.

[0047] It should be noted that, in this invention, the feed inlet of the reactor body 1 is located on the upper left side of the first-stage leaching chamber (i.e., according to conventional technical operation practices, the upper left position of the first leaching chamber from left to right). No special limitations are made regarding the size and shape of the feed inlet; those skilled in the art can make appropriate selections based on actual conditions.

[0048] In some embodiments, the reactor body 1 is a horizontal cylindrical structure.

[0049] In this invention, a horizontal cylindrical reactor body 1 is selected to facilitate continuous material flow and residence time control.

[0050] In some embodiments, the inner diameter of the reactor body 1 is D, the length is L, and the length-to-diameter ratio L / D is 1 to 1.2, for example, it can be 1, 1.1, 1.2, etc., but it is not limited to the listed values. Other unlisted values ​​within this range are also applicable.

[0051] It should be noted that the length-to-diameter ratio (L / D) of the reactor body 1 in this invention is selected to be 1 to 1.2 because within this range it is beneficial for the material to maintain a suitable residence time and flow path, avoid insufficient reaction or excessive energy consumption, and ensure leaching efficiency and stability.

[0052] In some embodiments, the chamfer angle θ of the chamfer structure 5 is 30° to 90°, for example, it can be 30°, 40°, 50°, 60°, 70°, 80°, 90°, etc., but it is not limited to the listed values. Other unlisted values ​​within this range are also applicable.

[0053] In this invention, the chamfer angle θ of the chamfer structure 5 is 30° to 90°. This is because within this range, the slurry can smoothly gather and flow along the chamfer, avoiding the formation of too narrow a channel that would obstruct the flow. It also prevents the material from stagnating and settling due to an excessively gentle angle. A fan-shaped structure is formed between two adjacent chamfer structures 5, which can further reduce dead zones in the liquid flow.

[0054] In some embodiments, the radius of the chamfer structure 5 is R, the height of the spacer 2 is H, and the ratio of R / H is 0.1 to 0.4, for example, it can be 0.1, 0.2, 0.3, 0.4, etc., but it is not limited to the listed values. Other unlisted values ​​within this range are also applicable.

[0055] In this invention, the radius of the chamfered structure 5 is R, and the height of the spacer 2 is H. The ratio of R / H is 0.1 to 0.4. This is because within this range, it is beneficial to balance the flow guidance and convergence, avoid the flow obstruction or stagnation, reduce dead angles, and improve leaching efficiency.

[0056] In some embodiments, the height of the connecting port 6 is h, and the ratio h / R to the radius R of the chamfer structure 5 is 0.1 to 0.4, for example, it can be 0.1, 0.2, 0.3, 0.4, etc., but it is not limited to the listed values. Other unlisted values ​​within this range are also applicable.

[0057] In this invention, the height of the connecting port 6 is h, and the ratio h / R to the radius R of the chamfer structure 5 is 0.1 to 0.4. This is because within this range, it is beneficial to ensure smooth flow of liquid and gradual advancement along the chamfer slope, reducing sedimentation and facilitating thorough final discharge.

[0058] In this invention, a connecting port 6 is provided at the chamfered structure 5 to allow the slurry to flow smoothly between adjacent leaching chambers, and to facilitate the slurry and residue to collect along the chamfer and finally be discharged through the discharge port 4 at the bottom of the reactor body 1, thereby achieving more thorough discharge and equipment cleaning.

[0059] In some embodiments, the spacer 2 is provided with 3 to 5, for example, 3, 4, 5, etc., but it is not limited to the listed values. Other unlisted values ​​within this range are also applicable.

[0060] It should be noted that the present invention has 3 to 5 partition plates 2, which can divide the interior of the reactor body 1 into 4 to 6 leaching chambers, thereby achieving a more efficient mixing effect.

[0061] In some embodiments, the ratio H / D of the height H of the partition plate 2 to the inner diameter D of the reactor body 1 is 0.4 to 0.8, for example, it can be 0.4, 0.5, 0.6, 0.7, 0.8, etc., but it is not limited to the listed values. Other unlisted values ​​within this range are also applicable.

[0062] The ratio H / D of the height H of the partition plate 2 to the inner diameter D of the reactor body 1 is 0.4 to 0.8. This is because within this range, it is beneficial to ensure that the partition plate 2 has an effective flow guiding and partitioning function. It avoids insufficient flow guiding and short-circuit flow of the slurry due to excessively low height, and also prevents excessively high height from hindering the upper connection of the liquid. This promotes uniform mixing and continuous advancement of the slurry, and improves leaching efficiency and stability.

[0063] In some embodiments, the first impeller 33 is a straight-blade turbine impeller.

[0064] In this invention, the first stirring paddle 33 is a straight-blade turbine stirring paddle, which is used to enhance the suspension and shearing capacity of the bottom slurry. The paddle bottom distance is related to the stirring power, and a suitable paddle bottom distance is conducive to the uniform mixing of materials.

[0065] In some embodiments, the second impeller 32 is an open turbine impeller.

[0066] In this invention, the second stirring paddle 32 is an open turbine stirring paddle, which is used to improve the circulation and gas-liquid dispersion effect in the liquid surface area. It has the advantages of preventing solid deposition, being suitable for viscous liquids, improving mixing efficiency, reducing liquid splashing, and being easy to maintain.

[0067] In this invention, a double-layer stirring blade combination formed by the first stirring blade 33 and the second stirring blade 32 is used. The blade spacing is conducive to solid-liquid mixing in the horizontal reactor, achieving a more efficient mixing effect.

[0068] In some embodiments, the diameter d of the straight-blade turbine impeller is 0.3D to 0.4D, for example, it can be 0.3D, 0.32D, 0.34D, 0.36D, 0.38D, 0.4D, etc., but is not limited to the listed values. Other unlisted values ​​within this range are also applicable.

[0069] The diameter d of the straight-blade turbine impeller in this invention is 0.3D to 0.4D. This is because within this range, it is beneficial to balance the stirring power and flow field distribution. It can enhance the suspension and shearing of the bottom slurry, prevent sedimentation, and avoid excessive energy consumption or excessive impact caused by an excessively large diameter, thereby ensuring the uniformity of mixing and leaching efficiency.

[0070] In some implementations, the blades of the open turbine impeller are three-bladed, four-bladed, or six-bladed.

[0071] In some embodiments, when the open turbine impeller has three blades, the blade angle is 50° to 70°, for example, 50°, 55°, 60°, 65°, 70°, etc., but not limited to the listed values; other unlisted values ​​within this range are also applicable; the blade diameter d up The range is 0.15D to 0.35D, for example, it can be 0.15D, 0.2D, 0.25D, 0.3D, 0.35D, etc., but it is not limited to the listed values. Other unlisted values ​​within this range are also applicable.

[0072] In some embodiments, when the open turbine impeller has four blades, the blade angle is 35° to 55°, for example, 35°, 40°, 45°, 50°, 55°, etc., but not limited to the listed values; other unlisted values ​​within this range are also applicable; the blade diameter d up The range is 0.15D to 0.35D, for example, it can be 0.15D, 0.2D, 0.25D, 0.3D, 0.35D, etc., but it is not limited to the listed values. Other unlisted values ​​within this range are also applicable.

[0073] In some embodiments, when the open turbine impeller has six blades, the blade angle is 15° to 35°, for example, 15°, 20°, 25°, 30°, 35°, etc., but not limited to the listed values; other unlisted values ​​within this range are also applicable; the blade diameter d up The range is 0.15D to 0.35D, for example, it can be 0.15D, 0.2D, 0.25D, 0.3D, 0.35D, etc., but it is not limited to the listed values. Other unlisted values ​​within this range are also applicable.

[0074] In some embodiments, the distance between the first stirring blade 33 and the second stirring blade 32 is C2, where C2 is 0.5d to 1.5d, for example, it can be 0.5d, 0.8d, 1d, 1.2d, 1.4d, 1.5d, etc., but it is not limited to the listed values. Other unlisted values ​​within this range are also applicable.

[0075] In this invention, the distance between the first stirring paddle 33 and the second stirring paddle 32 is C2, which is 0.5d to 1.5d. This is because within this range, it is beneficial to maintain the complementary flow fields of the upper and lower stirring paddles, thus avoiding flow interference caused by too small a distance and preventing insufficient mixing caused by too large a distance, thereby achieving efficient mixing in the entire space.

[0076] In some embodiments, the distance between the first stirring paddle 33 and the inner bottom of the leaching chamber is C1, where C1 is 0.29d to 0.85d, for example, it can be 0.29d, 0.3d, 0.4d, 0.5d, 0.6d, 0.7d, 0.8d, 0.85d, etc., but is not limited to the listed values. Other unlisted values ​​within this range are also applicable.

[0077] In this invention, the distance between the first stirring paddle 33 and the bottom of the leaching chamber is C1, where C1 is 0.29d to 0.85d. This is because within this range, it is beneficial to enhance the suspension and shearing of the bottom slurry, avoid sedimentation or dead zones in the stirring, and at the same time avoid insufficient flow at the bottom due to excessive paddle spacing, thereby ensuring uniform mixing and leaching efficiency.

[0078] For example, this utility model provides a method for using a horizontal reactor system for continuous hydrochloric acid leaching of laterite nickel ore at atmospheric pressure, comprising:

[0079] During operation, lateritic nickel ore is mixed with hydrochloric acid solution and enters the reactor body 1. Multiple leaching chambers, separated by partition plates 2, flow sequentially, and the slurry achieves full-space mixing under the action of the first agitator 33 and the second agitator 32. A chamfered structure 5 extending from the bottom of the partition plates 2 provides a connecting port 6, ensuring communication between adjacent leaching chambers. The slurry naturally converges along the chamfer and flows step-by-step into the next leaching chamber, avoiding dead zones and sediment buildup, thus ensuring continuous material flow and uniform reaction. The leached slurry and residue flow step-by-step from the leaching chambers and are finally discharged through the discharge port 4, achieving thorough slag removal and facilitating equipment cleaning and maintenance. This horizontal reactor system features a simple overall structure, high mixing uniformity, smooth material flow, and convenient operation, making it particularly suitable for the industrial application of continuous hydrochloric acid leaching of lateritic nickel ore at atmospheric pressure.

[0080] Example 1

[0081] This embodiment provides a horizontal reactor system for continuous hydrochloric acid leaching of laterite nickel ore under atmospheric pressure, wherein:

[0082] The reactor includes a reactor body 1 and a stirring assembly 3. The reactor body 1 has three partition plates 2 arranged in parallel, dividing the interior into four leaching chambers. A discharge port 4 is located at the bottom center of each leaching chamber. Two chamfered structures 5 are formed between the bottom edges of adjacent leaching chambers and the bottom edges of the partition plates 2. Each chamfered structure 5 has a connecting port 6 near the bottom edge of the leaching chamber, used to connect adjacent leaching chambers. Each leaching chamber contains a corresponding stirring assembly 3. The stirring assembly 3 includes a stirring shaft 31, a first stirring paddle 33, and a second stirring paddle 32. One end of the stirring shaft 31 is inserted into the top of the leaching chamber for connecting an external stirring motor. The other end of the stirring shaft 31 has the first stirring paddle 33 and the second stirring paddle 32 arranged in parallel along a direction away from the bottom of the leaching chamber. The structures of the first stirring paddle 33 and the second stirring paddle 32 are different.

[0083] The reactor body 1 is a horizontal cylindrical structure with an inner diameter of D and a length of L, and a length-to-diameter ratio of L / D of 1.

[0084] The chamfer angle θ of chamfer structure 5 is 60°, the radius of chamfer structure 5 is R, the height of partition 2 is H, the ratio of R / H is 0.25, and the ratio of the height of connecting opening 6 to the radius R of chamfer structure 5, h / R, is 0.3.

[0085] The ratio H / D of the height H of the partition plate 2 to the inner diameter D of the reactor body 1 is 0.5.

[0086] The first impeller 33 is a straight-blade turbine impeller with a diameter d of 0.325D.

[0087] like Figure 2 and Figure 3 As shown, the second impeller 32 is an open turbine impeller with four blades, a blade angle of 45°, and a blade diameter d. up It is 0.25D.

[0088] The distance between the first agitator 33 and the second agitator 32 is C2, where C2 is 1d, and the distance between the first agitator 33 and the bottom of the leaching chamber is C1, where C1 is 0.57d.

[0089] The horizontal reactor system in Example 1 achieves an optimal match between material propulsion, stirring intensity, and fluid circulation, ensuring that the slurry is uniformly mixed and fully reacted in each leaching chamber, resulting in the highest leaching efficiency.

[0090] Example 2

[0091] This embodiment provides a horizontal reactor system for continuous hydrochloric acid leaching of laterite nickel ore under atmospheric pressure, which differs from Embodiment 1 in that... Figure 4 and Figure 5 As shown, the open turbine impeller has six blades with a blade angle of 24°.

[0092] The horizontal reactor system in Example 2 enhances liquid circulation, but the six-blade structure results in significant resistance, increased stirring energy consumption, and stronger local shearing, which can easily lead to an uneven flow field. Experimental results show that although the leaching rate of this scheme is higher than that of Comparative Example 2, it is still lower than that of Example 1.

[0093] Example 3

[0094] This embodiment provides a horizontal reactor system for continuous hydrochloric acid leaching of laterite nickel ore under atmospheric pressure, which differs from Embodiment 1 in that... Figure 6 and Figure 7 As shown, the open turbine impeller has three blades with a blade angle of 60°.

[0095] The horizontal reactor system in Example 3 has good anti-deposition capabilities, but its liquid circulation intensity and gas-liquid dispersion effect are limited, and its stirring uniformity is not as good as that in Example 1. The results show that this scheme exhibits some adaptability in high-concentration slurries, but the overall leaching rate is still lower than that in Example 1.

[0096] Comparative Example 1

[0097] This comparative example provides a device for continuous hydrochloric acid leaching of laterite nickel ore under normal pressure. It adopts a vertical batch reactor with a vertical cylindrical structure and a single reaction space inside. The inner corner of the tank has no chamfered structure 5, and only a single discharge port 4 is set at the bottom of the tank. The stirring device is a single-shaft single-layer or double-layer stirring paddle, and the stirring shaft 31 enters from the top.

[0098] The operation method was batch feeding: under the same reaction conditions as in Example 1 (solid-liquid ratio, acid concentration, temperature, and total reaction time), lateritic nickel ore and hydrochloric acid solution were added to the reactor for leaching experiments. The results showed that the nickel / cobalt leaching rate of this batch process was basically equivalent to that of Example 1. However, due to the batch operation, each batch required non-production steps such as loading / unloading, temperature adjustments, and cleaning, making continuous discharge and steady-state operation impossible, resulting in a significantly lower throughput per unit volume compared to Example 1. Even if extending the single-batch reaction time or increasing the stirring power could compensate for insufficient local mixing and bring the leaching rate closer to that of Example 1, this would further reduce the effective production capacity, making it difficult to meet the demands of continuous and high-volume production.

[0099] Comparative Example 2

[0100] This comparative example provides a horizontal reactor system for continuous hydrochloric acid leaching of laterite nickel ore at atmospheric pressure. Unlike Example 1, the stirring assembly 3 has only one layer of straight-bladed turbine-type stirring paddles in the middle of the stirring shaft 31, with a diameter d = 0.325D and a paddle bottom distance C1 = 0.57d.

[0101] Compared with Example 1, Comparative Example 2 lacks the second stirring paddle 32 in the upper layer, resulting in insufficient circulation and gas-liquid dispersion in the liquid surface area. This leads to uneven mixing of the slurry in the upper layer, and the leaching rate and reaction uniformity are significantly lower than those in Example 1.

[0102] In summary, in the horizontal reactor system for continuous hydrochloric acid leaching of laterite nickel ore under atmospheric pressure, the chamfered structure 5 avoids dead corners and vortices, effectively improving the uniformity of slurry mixing. The combined design of the upper and lower stirring paddles balances the solid-liquid suspension at the bottom and the circulation of the liquid at the top, achieving efficient mixing throughout the entire space. The connecting port 6 allows for smooth flow of slurry between adjacent leaching chambers and facilitates the collection of slurry and residue along the slope before discharge through the discharge port 4 at the bottom of the leaching chamber, achieving more thorough discharge and equipment cleaning. The horizontal structure, combined with the guiding effect of the partition plate 2, allows the slurry to flow sequentially in different leaching chambers while maintaining interconnection in the upper solution, thereby controlling the flow path and residence time of the slurry, making the mixing more uniform, significantly improving the local mixing effect, and increasing the slurry mass transfer efficiency and leaching rate. The overall structure effectively improves the mixing uniformity and leaching reaction rate, reduces energy consumption, and improves the ease of equipment operation.

[0103] The above description is only a specific embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Those skilled in the art should understand that any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present utility model fall within the protection and disclosure scope of the present utility model.

Claims

1. A horizontal reactor system for continuous hydrochloric acid leaching of laterite nickel ore under atmospheric pressure, characterized in that, The horizontal reactor system includes a reactor body and a stirring assembly; The reactor body is provided with several partition plates inside, which are arranged in parallel to divide the reactor body into several leaching chambers. A discharge port is provided in the middle of the bottom of each leaching chamber. Two chamfer structures are formed between the bottom edge of adjacent leaching chambers and the bottom edge of the partition plates. A connecting port is provided on each of the two chamfer structures near the bottom edge of the leaching chamber. The connecting port is used to connect adjacent leaching chambers. Each leaching chamber is provided with a corresponding stirring assembly. The stirring assembly includes a stirring shaft, a first stirring blade, and a second stirring blade. One end of the stirring shaft is inserted into the top of the leaching chamber for connecting an external stirring motor. The other end of the stirring shaft is provided with the first stirring blade and the second stirring blade arranged in parallel along a direction away from the bottom of the leaching chamber. The structure of the first impeller is different from that of the second impeller.

2. The horizontal reactor system for continuous hydrochloric acid leaching of laterite nickel ore under atmospheric pressure according to claim 1, characterized in that, The reactor body is a horizontal cylindrical structure; The inner diameter of the reactor body is D, the length is L, and the length-to-diameter ratio L / D is 1 to 1.

2.

3. The horizontal reactor system for continuous hydrochloric acid leaching of laterite nickel ore under atmospheric pressure according to claim 1, characterized in that, The chamfer angle θ of the chamfered structure is 30° to 90°; The radius of the chamfered structure is R, the height of the spacer is H, and the ratio of R / H is 0.1 to 0.

4. The height of the connecting opening is h, and the ratio h / R to the radius R of the chamfered structure is 0.1 to 0.

4.

4. The horizontal reactor system for continuous hydrochloric acid leaching of laterite nickel ore under atmospheric pressure according to claim 1, characterized in that, The spacer plate is provided in 3 to 5 parts; The ratio H / D of the height H of the partition plate to the inner diameter D of the reactor body is 0.4 to 0.

8.

5. The horizontal reactor system for continuous hydrochloric acid leaching of laterite nickel ore under atmospheric pressure according to claim 1, characterized in that, The first impeller is a straight-blade turbine impeller; The second impeller is an open turbine impeller.

6. The horizontal reactor system for continuous hydrochloric acid leaching of laterite nickel ore under atmospheric pressure according to claim 5, characterized in that, The diameter d of the straight-blade turbine impeller is 0.3D to 0.4D.

7. The horizontal reactor system for continuous hydrochloric acid leaching of laterite nickel ore under atmospheric pressure according to claim 5, characterized in that, The blades of the open turbine impeller are three-bladed, four-bladed, or six-bladed.

8. The horizontal reactor system for continuous hydrochloric acid leaching of laterite nickel ore under atmospheric pressure according to claim 7, characterized in that, When the open turbine stirring paddle is three-blade, the angle of the blade is 50°-70°, the diameter d of the blade is 0.15D-0.35D up . When the open turbine stirring paddle has four blades, the angle of the blade is 35°-55°, the diameter d of the blade is 0.15D-0.35D up 0.15D-0.35D; When the open turbine stirring paddle has six blades, the angle of the blade is 15°-35°, and the diameter d of the blade is 0.15D-0.35D. up When the open turbine stirring paddle has six blades, the angle of the blade is 15°-35°, and the diameter d of the blade is 0.15D-0.35D.

9. The horizontal reactor system for continuous hydrochloric acid leaching of laterite nickel ore under atmospheric pressure according to claim 1, characterized in that, The distance between the first stirring blade and the second stirring blade is C2, where C2 is 0.5d to 1.5d.

10. The horizontal reactor system for continuous hydrochloric acid leaching of laterite nickel ore under atmospheric pressure according to claim 1, characterized in that, The distance between the first stirring paddle and the bottom of the leaching chamber is C1, where C1 is 0.29d to 0.85d.

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