A high pressure leaching flash tank for laterite nickel ore

Abstract

The application relates to a high-pressure leaching flash tank for laterite nickel ore, which comprises a tank body, a buffer assembly and a stirring assembly. The upper end of the tank body is provided with a steam outlet, the lower end is provided with a liquid discharge port, and the side part is provided with a liquid inlet. The buffer assembly comprises a shell, a rotating shaft and an impeller. The shell is arranged in the tank body, the shell is provided with a cavity, an inlet and an outlet which are connected with the cavity, the outlet is located at the bottom of the shell, the inlet is connected with the liquid inlet, the upper end of the rotating shaft is rotatably arranged in the cavity and the lower end of the rotating shaft extends out of the cavity from the outlet, the impeller is located in the cavity and connected with the upper end of the rotating shaft, and the stirring assembly is arranged at the lower end of the rotating shaft and used for extending into the slurry. The buffer assembly and the stirring assembly can avoid the erosion and abrasion of the tank body caused by high-speed slurry, and the high-speed liquid flow can be used to stir the bottom slurry.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mine production equipment, and particularly relates to a high-pressure leaching flash tank for laterite nickel ore. BACKGROUND

[0002] With the vigorous development of the new energy automobile industry in China, the demand for Ni, Co and Mn metals in new energy ternary materials is increasing, and the development of laterite nickel ore with large reserves but low nickel grade has gradually become a hot spot in the industry. The hydrometallurgical route of sulfuric acid leaching under high temperature and high pressure is one of the mainstream smelting processes for laterite nickel ore at present. The leaching slurry must be treated by reducing temperature and pressure before entering the next solid-liquid separation process, and the flash tank is the main equipment for reducing temperature and pressure.

[0003] Patent CN103801098A is a steam flash tank, which comprises a tank body, a water inlet above the tank body, a water outlet below the tank body, an air inlet and an air outlet, and a water attachment device is further arranged in the tank body.

[0004] However, when the liquid enters the flash tank, the liquid pressure is suddenly released, which will flush the flash tank body at a very fast speed. Long-time flushing can easily cause damage to the tank body and reduce the service life of the tank body. SUMMARY

[0005] Therefore, it is necessary to provide a high-pressure leaching flash tank for laterite nickel ore to solve the technical problem that when the liquid enters the flash tank, the liquid pressure is suddenly released, which will flush the flash tank body at a very fast speed, long-time flushing can easily cause damage to the tank body and reduce the service life of the tank body.

[0006] The present application provides a high-pressure leaching flash tank for laterite nickel ore, which comprises:

[0007] a tank body, the upper end of the tank body is provided with a steam outlet, the lower end is provided with a liquid outlet, and the side part is provided with a liquid inlet;

[0008] a buffer assembly, which comprises a shell, a rotating shaft and an impeller, the shell is arranged in the tank body, the shell is provided with a cavity and an inlet and an outlet communicating with the cavity, the outlet is located at the bottom of the shell, the inlet is connected with the liquid inlet, the upper end of the rotating shaft is rotatably installed in the cavity and the lower end extends out of the cavity from the outlet, the impeller is located in the cavity and connected with the upper end of the rotating shaft;

[0009] a stirring assembly installed at the lower end of the rotating shaft, the stirring assembly is used to extend into the slurry.

[0010] In some embodiments, the impeller comprises a base and a lower cover, the lower side of the base is convexly formed with a plurality of blades, the plurality of blades are circumferentially spaced apart along the base, each blade extends from the outer circumference of the base to the middle part of the base in the rotation direction, the middle part of the lower cover is provided with an opening corresponding to the outlet, and the lower cover is arranged on the lower side of the plurality of blades.

[0011] In some embodiments, the opening is gradually expanded from bottom to top, and the lower side of the blade is gradually inclined downward from the outer circumference of the base to the middle part of the base, so that the lower side of the blade is matched with the upper side of the lower cover.

[0012] In some embodiments, the shell comprises a mounting plate and an annular shell plate, the mounting plate is mounted in the tank body, the annular shell plate is detachably mounted on the lower side of the mounting plate, the annular shell plate and the mounting plate jointly enclose the cavity, the side of the annular shell plate is provided with the inlet, and the bottom of the annular shell plate is provided with the outlet.

[0013] In some embodiments, the annular shell plate is rotationally mounted on the mounting plate, the lower side of the mounting plate is provided with a mounting hole, one side of the mounting hole is provided with an anti-falling groove, the mounting hole and the anti-falling groove are arranged in sequence along the rotation direction of the impeller, and the width of the mounting hole is greater than the width of the anti-falling groove.

[0014] The upper side of the annular shell plate is provided with a convex column, the convex column has a first convex segment and a second convex segment which are sequentially stacked from bottom to top, the anti-falling groove is matched with the first convex segment, the mounting hole is matched with the second convex segment, the convex column extends into the mounting hole, and when the annular shell plate rotates, the first convex segment slides from the mounting hole into the anti-falling groove, so that the annular shell plate is fixed on the annular shell plate.

[0015] In some embodiments, the mounting plate is hollow in circumference.

[0016] In some embodiments, the inlet extends in the tangential direction of the impeller.

[0017] The laterite nickel ore high-pressure leaching flash tank further comprises a connecting pipeline, the connecting pipeline extends from outside the tank body into the tank body, one end of the connecting pipeline in the tank body is connected with the inlet, and the connecting pipeline is consistent with the inlet in the extension direction of the impeller.

[0018] In some embodiments, the laterite nickel ore high-pressure leaching flash tank further comprises a plurality of liquid blocking plates, the plurality of liquid blocking plates are arranged on the rotating shaft, the plurality of liquid blocking plates are circumferentially spaced apart along the rotating shaft, and the plurality of liquid blocking plates are located between the stirring assembly and the impeller.

[0019] In some embodiments, the liquid baffle is inclinedly arranged.

[0020] In some embodiments, the stirring assembly comprises a propeller stirring paddle for disturbing and mixing the material and making it float.

[0021] Compared with the prior art, the high-pressure leaching flash tank for laterite nickel ore provided by the application has the following advantages: the upper end of the tank body is provided with a steam outlet, the lower end is provided with a liquid outlet, and the side is provided with a liquid inlet; the shell is arranged in the tank body, the shell is provided with a cavity and an inlet and an outlet communicating with the cavity, the outlet is located at the bottom of the shell, the inlet is connected with the liquid inlet, the upper end of the rotating shaft is rotatably arranged in the cavity and the lower end extends out of the cavity from the outlet, the impeller is located in the cavity and connected with the upper end of the rotating shaft; the stirring assembly is arranged at the lower end of the rotating shaft, and the stirring assembly is used to extend into the slurry; in specific use, the high-speed flowing ore slurry flows into the shell from the liquid inlet and drives the impeller to rotate, the energy of the ore slurry is consumed by driving the impeller to rotate, the flow rate of the ore slurry is slowed down, and the ore slurry enters the bottom of the tank body at a relatively slow speed, at the same time, the rotation of the impeller drives the stirring assembly to rotate, and the stirring assembly is located in the ore slurry at the bottom of the tank body, so that the ore slurry at the bottom of the tank body can be stirred by the stirring assembly to avoid sedimentation, and the buffer assembly and the stirring assembly are arranged to avoid the erosion and wear of the tank body caused by high-speed ore slurry, and the high-speed liquid flow can be used to stir the ore slurry at the bottom.

[0022] The above description is only a summary of the technical scheme of the application, in order to more clearly understand the technical means of the application, and can be implemented according to the content of the specification, and the preferred embodiments of the application are described in detail below with the help of the drawings. The specific embodiments of the application are described in detail below with the help of the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0023] The drawings described herein are used to provide further understanding of the application, and form a part of the application. The schematic embodiments of the application and their descriptions are used to explain the application, and do not constitute an improper limitation on the application. In the drawings:

[0024] Figure 1 The structure schematic view of an embodiment of the high-pressure leaching flash tank for laterite nickel ore provided by the application;

[0025] Figure 2 The structure schematic view of an embodiment of the high-pressure leaching flash tank for laterite nickel ore provided by the application; Figure 1 The front view of the high-pressure leaching flash tank for laterite nickel ore;

[0026] Figure 3 The structure schematic view of an embodiment of the high-pressure leaching flash tank for laterite nickel ore provided by the application; Figure 1Top view of the high-pressure leaching flash tank of the medium laterite nickel ore;

[0027] Figure 4 For Figure 1 The perspective view of the buffer assembly;

[0028] Figure 5 For Figure 1 The sectional view of the buffer assembly;

[0029] Figure 6 For Figure 1 The sectional view of the impeller;

[0030] Figure 7 For Figure 1 The perspective view of the base;

[0031] Figure 8 For Figure 1 The perspective view of the annular shell plate;

[0032] Figure 9 For Figure 1 The perspective view of the mounting plate.

[0033] Explanation of reference signs:

[0034] 1 - tank body, 11 - steam outlet, 12 - liquid discharge port, 13 - liquid inlet port, 2 - buffer assembly, 21 - shell, 211 - mounting plate, 2111 - mounting hole, 2112 - anti-off groove, 212 - annular shell plate, 2121 - inlet port, 2122 - outlet port, 2123 - first protruding section, 2124 - second protruding section, 22 - rotating shaft, 23 - impeller, 231 - base, 2311 - blade, 232 - lower cover, 2321 - opening, 3 - propeller stirring paddle, 4 - liquid baffle, 5 - connecting pipeline. DETAILED DESCRIPTION

[0035] The preferred embodiments of the present application will be described in detail below with reference to the drawings, which form a part of this application, and together with the embodiments of the present application, illustrate the principles of the present application, but not limit the scope of the present application.

[0036] Please refer to Figures 1 to 9The application discloses a high-pressure leaching flash tank for laterite nickel ore, which comprises a tank body 1, a buffer assembly 2 and a stirring assembly, wherein the upper end of the tank body 1 is provided with a steam outlet 11, the lower end is provided with a liquid outlet 12, and the side part is provided with a liquid inlet 13; the buffer assembly 2 comprises a shell 21, a rotating shaft 22 and an impeller 23, the shell 21 is arranged in the tank body 1, the shell 21 is provided with a cavity, an inlet 2121 and an outlet 2122 which are connected with the cavity, the outlet 2122 is located at the bottom of the shell 21, the inlet 2121 is connected with the liquid inlet 13, the upper end of the rotating shaft 22 is rotatably arranged in the cavity and the lower end extends out of the cavity from the outlet 2122, the impeller 23 is located in the cavity and connected with the upper end of the rotating shaft 22, and the stirring assembly is arranged at the lower end of the rotating shaft 22 and used for extending into the slurry.

[0037] The application discloses a high-pressure leaching flash tank for laterite nickel ore, which comprises a tank body 1, a buffer assembly 2 and a stirring assembly, wherein the upper end of the tank body 1 is provided with a steam outlet 11, the lower end is provided with a liquid outlet 12, and the side part is provided with a liquid inlet 13; the buffer assembly 2 comprises a shell 21, a rotating shaft 22 and an impeller 23, the shell 21 is arranged in the tank body 1, the shell 21 is provided with a cavity, an inlet 2121 and an outlet 2122 which are connected with the cavity, the outlet 2122 is located at the bottom of the shell 21, the inlet 2121 is connected with the liquid inlet 13, the upper end of the rotating shaft 22 is rotatably arranged in the cavity and the lower end extends out of the cavity from the outlet 2122, the impeller 23 is located in the cavity and connected with the upper end of the rotating shaft 22, and the stirring assembly is arranged at the lower end of the rotating shaft 22 and used for extending into the slurry.

[0038] Further, in the embodiment, the impeller 23 comprises a base 231 and a lower cover 232, the lower side of the base 231 is protruded to form a plurality of blades 2311, the plurality of blades 2311 are arranged at intervals along the circumference of the base 231, each blade 2311 extends from the outer circumference of the base 231 to the middle part of the base 231 in the rotation direction, the middle part of the lower cover 232 is penetrated by an opening 2321, the opening 2321 is arranged corresponding to the outlet 2122, and the lower cover 232 is arranged at the lower side of the plurality of blades 2311. Specifically, two adjacent blades 2311 and the base 231 and the lower cover 232 jointly enclose a channel, the channel is arranged corresponding to the inlet 2121 and the opening 2321, when the ore pulp enters the cavity from the inlet 2121, the ore pulp flows to the opening 2321 through the channel to drive the rotation of the impeller 23, and the base 231 and the lower cover 232 can limit the ore pulp to avoid upward or downward spatter.

[0039] Further, the outlet 2122 is located at the middle part of the shell 21 and is arranged corresponding to the impeller 23, and the sectional area of the inlet 2121 is smaller than that of the outlet 2122, so that the flow rate of the ore pulp flowing out of the shell 21 can be reduced.

[0040] Further, each blade 2311 is arranged in an arc shape and has good directivity to guide the ore pulp.

[0041] Further, the opening 2321 is arranged in a gradually expanding manner from bottom to top, the lower side of the blade 2311 is arranged in a gradually downward inclined manner from the outer circumference of the base 231 to the middle part of the base 231, so that the lower side of the blade 2311 is adapted to the upper side of the lower cover 232. Specifically, the opening 2321 is arranged in a horn mouth, so that the ore pulp can be guided downward to smoothly flow out of the opening 2321.

[0042] Further, the shell 21 comprises a mounting plate 211 mounted in the tank body 1 and an annular shell plate 212 detachably mounted on the lower side of the mounting plate 211, the annular shell plate 212 and the mounting plate 211 jointly form the cavity, the side of the annular shell plate 212 is provided with the inlet 2121, and the bottom of the annular shell plate 212 is provided with the outlet 2122. Specifically, the mounting plate 211 is disc-shaped, connected with the side wall of the tank body 1, and the annular shell plate 212 is disc-shaped as a whole, mounted on the middle of the mounting plate 211, so that the mounting plate 211 and the annular shell plate 212 are coaxially arranged, and the mounting plate 211 and the annular shell plate 212 are detachably connected, facilitating installation, replacement and later maintenance.

[0043] Further, the mounting form of the annular shell plate 212 and the mounting plate 211 is not limited, in the embodiment, the annular shell plate 212 is rotationally mounted on the mounting plate 211, the lower side of the mounting plate 211 is provided with a mounting hole 2111, one side of the mounting hole 2111 is extended and provided with an anti-falling groove 2112, the mounting hole 2111 and the anti-falling groove 2112 are sequentially arranged along the rotation direction of the impeller 23, and the width of the mounting hole 2111 is greater than that of the anti-falling groove 2112; the upper side of the annular shell plate 212 is provided with a protruding column, the protruding column has a first protruding section 2123 and a second protruding section 2124 sequentially stacked from bottom to top, the anti-falling groove 2112 is matched with the first protruding section 2123, and the mounting hole 2111 is matched with the second protruding section 2124, the protruding column extends into the mounting hole 2111, and when the annular shell plate 212 rotates, the first protruding section 2123 slides from the mounting hole 2111 into the anti-falling groove 2112, so that the annular shell plate 212 is fixed on the annular shell plate 212.

[0044] Specifically, the mounting hole 2111 and the anti-off groove 2112 are both arranged in an arc shape and concentrically arranged with the mounting plate 211. Correspondingly, the convex column is also arranged in an arc shape and concentrically arranged with the mounting plate 211. Specifically in use, first, the convex column is correspondingly arranged with the mounting hole 2111, the convex column is inserted into the mounting hole 2111, then the annular shell plate 212 is rotated, so that the convex column is slid into the anti-off groove 2112, and the anti-off groove 2112 limits the convex column, thereby achieving the purpose of fixing the annular shell plate 212. The mounting hole 2111 and the anti-off groove 2112 are sequentially arranged along the rotation direction of the impeller 23. In operation, the pulp continuously applies an external force to the annular shell plate 212, so that the first convex section 2123 is always located in the anti-off groove 2112 under the action of the external force, thereby avoiding accidental falling of the annular shell plate 212 in operation. When replacement is needed, the pulp is stopped from entering, and then the annular shell plate 212 is easily removed by being reversely rotated. The operation is simple, maintenance is convenient, and downtime is reduced.

[0045] Further, the mounting hole 2111 and the anti-off groove 2112 have the same length, and correspondingly, the convex column and the mounting hole 2111 have the same length.

[0046] Further, when the pulp enters the tank body 1, a large amount of steam is generated. The steam is discharged to the outside of the tank body 1 through the steam outlet 11 at the top of the tank body 1. The mounting plate 211 is located in the middle of the tank body 1 and connected with the side wall of the tank body 1. In order to avoid interference of the mounting plate 211 with the discharge of steam, in this embodiment, the circumference of the mounting plate 211 is hollow. In this way, the steam can smoothly pass through the hollow position of the mounting plate 211 and be discharged from the steam outlet 11.

[0047] Further, in this embodiment, the inlet 2121 extends along the tangential direction of the impeller 23; the laterite nickel ore high-pressure leaching flash tank further comprises a connecting pipeline 5, the connecting pipeline 5 extends into the tank body 1 from the outside of the tank body 1, and one end of the connecting pipeline 5 located in the tank body 1 is connected with the inlet 2121. The connecting pipeline 5 is consistent with the inlet 2121 along the extension direction of the impeller 23. In this way, after the pulp enters the cavity, the main force acts on the blade 2311.

[0048] Further, one end of the connecting pipeline 5 located in the tank body 1 is arranged in an arc shape to match the outer periphery of the annular shell plate 212, so as to avoid interference of the connecting pipeline 5 with the installation and removal of the annular shell plate 212.

[0049] Further, in order to improve the flash efficiency, in the embodiment, the laterite nickel ore high-pressure leaching flash tank further comprises a plurality of liquid baffles 4, the plurality of liquid baffles 4 are arranged on the rotating shaft 22, the plurality of liquid baffles 4 are arranged at intervals along the circumferential direction of the rotating shaft 22, and the plurality of liquid baffles 4 are located between the stirring assembly and the impeller 23. The plurality of liquid baffles 4 are arranged corresponding to the outlet 2122, when the slurry is discharged from the outlet 2122, the plurality of liquid baffles 4 are first contacted, and the plurality of liquid baffles 4 are driven to rotate by the rotating shaft 22, so that part of the slurry is scattered, the exposure area of the slurry is increased, and the flash efficiency is improved.

[0050] Further, in the embodiment, the liquid baffles 4 are arranged obliquely. In this way, the area of the liquid baffles 4 in the horizontal direction is increased, so that the contact area between the liquid baffles 4 and the slurry is increased.

[0051] Further, in the embodiment, the stirring assembly comprises a propelling stirring paddle 3, which is used for disturbing and mixing the material and floating the material.

[0052] In the description of the present application, it should be noted that, if there is a directional indication (such as up, down, left, right, front, back, etc.), the directional indication is only used to explain the relative position relationship, movement condition, etc. between components in a certain specific posture (as shown in the drawings), if the specific posture changes, the directional indication also changes accordingly. Unless otherwise specified and limited, the terms “mounting”, “connecting”, “connection” should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integral connection; can be mechanical connection, can also be electrical connection; can be direct connection, can also be indirect connection through an intermediate medium, can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0053] It should be noted that, in the present application, the relationship terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or sequence between the entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device. Without more limitations, the element defined by the statement "including a" does not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, the meaning of "and / or" appearing throughout the text includes three parallel schemes, for example, "A and / or B" includes A scheme or B scheme or A and B scheme. In addition, the technical solutions of various embodiments can be combined with each other, but it must be based on the realization of the person skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor within the protection scope of the present application.

[0054] The above description is only the preferred embodiment of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A high pressure leaching flash tank for laterite nickel ore, characterised in that, It includes: The tank body is provided with a steam outlet at the upper end, a liquid outlet at the lower end, and a liquid inlet at the side; The buffer assembly includes a shell, a rotating shaft, and an impeller. The shell is arranged in the tank body. The shell is provided with a cavity, an inlet, and an outlet. The inlet is connected with the liquid inlet. The outlet is located at the bottom of the shell. The rotating shaft is rotatably installed in the cavity at the upper end and extends out of the cavity at the lower end. The impeller is located in the cavity and connected with the upper end of the rotating shaft; The stirring assembly is installed at the lower end of the rotating shaft and used for extending into the slurry; The shell includes a mounting plate and an annular shell plate. The mounting plate is installed in the tank body. The annular shell plate is detachably installed on the lower side of the mounting plate. The annular shell plate and the mounting plate jointly form the cavity. The side of the annular shell plate is provided with the inlet. The bottom of the annular shell plate is provided with the outlet. The annular shell plate is rotatably installed on the mounting plate. The lower side of the mounting plate is provided with a mounting hole. One side of the mounting hole is provided with an anti-escape groove. The mounting hole and the anti-escape groove are arranged in sequence along the rotating direction of the impeller. The width of the mounting hole is greater than that of the anti-escape groove. The upper side of the annular shell plate is provided with a convex column. The convex column has a first convex section and a second convex section arranged in sequence from bottom to top. The anti-escape groove is matched with the first convex section. The mounting hole is matched with the second convex section. The convex column extends into the mounting hole. When the annular shell plate rotates, the first convex section slides into the anti-escape groove from the mounting hole, so that the annular shell plate is fixed on the mounting plate. The inlet extends along the tangent direction of the impeller. The laterite nickel ore high-pressure leaching flash tank also includes a connecting pipeline. The connecting pipeline extends into the tank body from outside the tank body. One end of the connecting pipeline in the tank body is connected with the inlet. The connecting pipeline is consistent with the inlet along the extension direction of the impeller.

2. The autoclave for high pressure leaching of laterite nickel ore according to claim 1, characterized in that, The impeller includes a base and a lower cover. The lower side of the base is provided with a plurality of blades. The blades are arranged in a circumferential direction. Each blade extends from the outer periphery of the base to the middle of the base in the rotating direction. The middle of the lower cover is provided with an opening. The opening is arranged corresponding to the outlet. The lower cover is arranged on the lower side of the blades.

3. The autoclave for high pressure leaching of laterite nickel ore according to claim 2, characterized in that, The opening is arranged in a gradually expanding manner from bottom to top. The lower side of the blade is arranged in a gradually downward inclined manner from the outer periphery of the base to the middle of the base, so that the lower side of the blade is matched with the upper side of the lower cover.

4. The autoclave for high pressure leaching of laterite nickel ore according to claim 1, characterized in that, The mounting plate is hollowed out in a circumferential direction.

5. The autoclave for high pressure leaching of laterite nickel ore according to claim 1, characterized in that, The laterite nickel ore high-pressure leaching flash tank also includes a plurality of liquid blocking plates. The liquid blocking plates are arranged on the rotating shaft. The liquid blocking plates are arranged in a circumferential direction. The liquid blocking plates are located between the stirring assembly and the impeller.

6. The autoclave for high pressure leaching of laterite nickel ore according to claim 5, characterized in that, The liquid blocking plate is arranged in an inclined manner.

7. The autoclave for high pressure leaching of laterite nickel ore according to claim 1, characterized in that, The stirring assembly includes a propelling stirring paddle. The propelling stirring paddle is used for disturbing and mixing the material and making it float.

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