A device and process equipment for ore powder concentrated acid curing-leaching reaction

Abstract

The application provides a device and a process equipment for ore powder concentrated acid curing-leaching reaction, and relates to the technical field of hydrometallurgy, to solve the problem that the material after curing needs to be transferred to a traditional stirring leaching tank for leaching, which leads to difficult transfer and large heat loss. The device for ore powder concentrated acid curing-leaching reaction comprises a container body, an acidification mixing mechanism and a leaching mechanism. The acidification mixing mechanism is arranged at the top of the container body, and the leaching mechanism is arranged at the bottom of the container body. The ore powder and the concentrated acid enter the inside of the container body from the top end of the container body and are mixed and acidified at the top of the container body through the acidification mixing mechanism. The acidified material falls to the bottom of the container body and is subjected to solvent leaching through the leaching mechanism. The material after leaching is conveyed out from the bottom of the container body. The application enables the ore powder to be cured by concentrated acid without material transfer, and continuous leaching is performed on line, thereby simplifying the operation process of concentrated acid curing and leaching.

Description

Technical Field

[0001] This invention relates to the field of hydrometallurgical technology, and in particular to a device and process equipment for the concentrated acid aging-leaching reaction of mineral powder. Background Technology

[0002] Acid leaching refers to a mineral leaching process that uses an aqueous solution of inorganic acid as the leaching agent. It is one of the most commonly used leaching methods in hydrometallurgy. Concentrated acid aging leaching usually refers to a process where, under conditions of a high solid-liquid ratio, the acid and mineral powder are brought into uniform contact, and then aged at a suitable temperature for a certain period of time. The soluble metal salts are then leached into the liquid phase, thereby extracting valuable elements from the ore.

[0003] Extracting valuable elements from ores is a crucial step in hydrometallurgical processes, and the extraction rate of these elements determines the economic benefits of the entire hydrometallurgical project. To achieve a reasonable leaching rate, the ore is typically pretreated before leaching. Ore pretreatment mainly includes physical sorting, grinding, oxidative roasting, chemical oxidation, and pressurized oxidation. Acidification and oxidative roasting of ore powder consumes a large amount of fuel and emits low-concentration sulfur dioxide flue gas into the atmosphere, further deteriorating the on-site production environment under high-temperature conditions. Chemical oxidation and stirring leaching of ore powder using acid, alkali, or salt solutions is a commonly used process for extracting valuable elements from ores in hydrometallurgical processes.

[0004] However, with the gradual depletion of mineral resources, the grade of ore delivered to smelting plants is continuously declining, and the diversity of impurities is increasing. Previously effective metallurgical processes are gradually revealing various drawbacks. Many scholars and research experts in the industry have conducted detailed research and experiments on the concentrated acid aging extraction process of mineral powder, summarizing numerous process parameters for raw mineral powder extraction. Currently, research on the process flow, reaction mechanism, and kinetics is relatively in-depth, but research on the equipment used in the concentrated acid aging process is limited. At present, rotary kilns and concrete mixers are mainly used for concentrated acid aging treatment, especially for the subsequent processing of the thin, paste-like slurry produced after mineral powder acidification, for which there is currently no suitable dedicated equipment.

[0005] Chinese patent document CN106477606 A discloses a method for extracting alumina from fly ash based on sulfuric acid aging, comprising the following steps: (1) Sulfuric acid aging: fly ash and concentrated sulfuric acid are mixed evenly in a certain ratio and then aging to obtain sulfated clinker. The aging temperature is 100-500℃ and the aging time is 1-48h. The aging equipment is a rotary kiln, and the heating rate of the material in the rotary kiln is controlled at 0.5-5℃ / min, wherein the residence time in the 100-150℃ range is not less than 30min, and the residence time in the 20℃ range is not less than 30min. The residence time in the 0~300℃ range is 0.5-2h; (2) Leaching: The sulfated clinker obtained in step (1) is mixed with aluminum precipitation mother liquor and an appropriate amount of supplementary water and stirred for a period of time, and then filtered to obtain aluminum sulfate solution and high silica slag; (3) Aluminum precipitation: The aluminum sulfate solution obtained in step (2) is mixed with an appropriate amount of aluminum precipitation agent and reacted for a period of time, and then filtered to obtain alum and aluminum precipitation mother liquor. The aluminum precipitation mother liquor is returned to step (2) for leaching. The aluminum precipitation agent is one or more of potassium sulfate, ammonium sulfate, and sodium sulfate.

[0006] A paper published in the March 2002 issue of the *Journal of Guangxi University (Natural Science Edition)* by Huang Peifang et al. investigated the production of manganese sulfate from pyrite and manganese ore using concentrated sulfuric acid leaching. The procedure was as follows: 1. Leaching: Pyrite and manganese ore powder were placed in a mixer (a disc mixer used for concrete) at a ratio of 1:0.2. Water was sprayed and mixed evenly, with the water volume controlled to be about 15% of the ore weight. 96% concentrated sulfuric acid was gradually added while continuously stirring, with the amount of concentrated sulfuric acid added being 28% (by weight) of the manganese ore. Due to the heat of reaction and the heat of sulfuric acid dilution, the reaction was very vigorous, with temperatures reaching over 150℃, and a large amount of water vapor was evaporated. The water vapor was extracted and discharged by a blower. After the sulfuric acid was added, the mixture was left to stand for a relatively long time to ensure a thorough reaction. 2. Leaching: The leached material was subjected to a four-stage countercurrent leaching process at a solid-liquid ratio of 1:4. The first stage of the four-stage leaching tank used mechanical and air agitation, while the remaining three stages used air agitation. The purpose was to increase the concentration of MnSO4 in the leaching solution. In the first-stage leaching tank, approximately 2% pyrolusite is gradually added to neutralize the excess sulfuric acid and oxidize ferrous iron to ferric iron. The oxidation is further completed under the action of air for 2-3 hours. The material is discharged when its pH reaches 4.8.

[0007] The two different mineral powders mentioned above were extracted using concentrated acid leaching to obtain valuable elements from the ore. Chinese patent document CN106477606 A uses a rotary kiln for concentrated acid leaching; a document published in the March 2002 issue of the *Journal of Guangxi University (Natural Science Edition)* uses a concrete disc mixer for concentrated acid leaching. Both methods involve mechanical stirring for concentrated acid leaching, and the leached material needs to be transferred to a traditional stirring leaching tank for leaching. While using a rotary kiln for concentrated acid leaching can ensure a controllable leaching process, it suffers from high energy consumption and significant equipment investment. Using a concrete disc mixer for concentrated acid leaching requires additional equipment or space to meet the leaching conditions, and presents challenges such as difficulty in transferring the acidified mineral powder, significant heat loss, and long operating cycles. Summary of the Invention

[0008] The purpose of this invention is to provide a concentrated acid aging-leaching reaction device and process equipment for mineral powder, so as to solve the problem that the material after aging needs to be transferred to a traditional stirred leaching tank for leaching in the prior art, which leads to difficulties in transfer and large heat loss. The concentrated acid aging-leaching reaction device of this invention eliminates the need for material transfer after the mineral powder has been aged in concentrated acid, and allows for continuous leaching online. This simplifies the operation process of concentrated acid aging and leaching, shortens the operation cycle, and can make full use of the heat generated by the material after concentrated acid aging for the leaching process, thereby simplifying the leaching process equipment.

[0009] This invention provides an apparatus for the concentrated acid aging and leaching reaction of mineral powder, comprising a container body, an acidification and mixing mechanism, and a leaching mechanism. The acidification and mixing mechanism is disposed at the top of the container body, and the leaching mechanism is disposed at the bottom of the container body. The mineral powder and concentrated acid enter the interior of the container body from the top of the container body and are mixed and acidified at the top of the container body by the acidification and mixing mechanism. The acidified material falls to the bottom of the container body and is leached by the solvent through the leaching mechanism. The leached material is then conveyed out from the bottom of the container body.

[0010] In a preferred embodiment of the present invention, the acidification mixing mechanism includes a non-powered mixer, an atomizing turbine, a connecting shaft, a mineral powder disperser, and multiple high-speed nozzles. The non-powered mixer is rotatably connected to the connecting shaft via bearings. The atomizing turbine is connected to the upper end of the non-powered mixer. The multiple high-speed nozzles are arranged around the atomizing turbine with their outlets facing the atomizing turbine. The mineral powder disperser is arranged above the non-powered mixer with its outlet distributed around its bottom surface. Multiple power teeth are arranged around the atomizing turbine. The concentrated acid sprayed from the high-speed nozzles impacts the power teeth and drives the atomizing turbine and the non-powered mixer to rotate synchronously. The mineral powder flowing down from the outlet of the mineral powder disperser mixes with the concentrated acid on the non-powered mixer.

[0011] As a preferred embodiment of the present invention, the diameter of the non-powered mixer gradually increases from its top to its bottom, the non-powered mixer is coaxially connected to the connecting shaft, and the outlet of the mineral powder disperser corresponds to the inclined surface of the non-powered mixer.

[0012] As a preferred embodiment of the present invention, the connecting shaft is hollow inside, the bottom end of the connecting shaft is connected to the concentrated acid delivery mechanism on the outside of the container body through an acid delivery pipe, the top end of the connecting shaft is connected to the high-speed nozzle, and the connecting shaft is connected to the container body through a bracket.

[0013] In a preferred embodiment of the present invention, the leaching mechanism includes a material distribution plate, an impeller, and a liquid distribution pipe. The material distribution plate is arranged along the cross-section of the container body, and the impeller is arranged on the lower side of the material distribution plate. Multiple through holes are provided on the material distribution plate, and the acidified material falls onto the impeller through the through holes. The liquid distribution pipe is arranged on the material distribution plate inside the through holes, and multiple liquid outlet holes are provided on the bottom side of the liquid distribution pipe. Perforations are provided on the material distribution plate corresponding to the positions of the liquid outlet holes. The liquid in the liquid distribution pipe flows to the impeller through the liquid outlet holes and the perforations and forms a liquid film on the impeller. The rotation of the impeller drives the liquid film to flush the acidified material.

[0014] As a preferred embodiment of the present invention, the impeller includes a hub, lower blades, an impeller disk, and a sealing ring. The lower blades are radially distributed around the hub, the impeller disk is connected to the outer periphery of the lower blades, the sealing ring is disposed on the inner side of the impeller disk, and a plurality of upper blades are disposed on the upper side of the impeller disk. The upper blades have an involute structure from the inside to the outside.

[0015] As a preferred embodiment of the present invention, an arch breaker is provided on the upper side of the fabric disc. The arch breaker is a conical shell. The arch breaker is connected to the fabric disc and forms an equipment compartment between the arch breaker and the fabric disc. A hydraulic motor and a frame are provided in the equipment compartment. The hydraulic motor is connected to the frame. The output shaft of the hydraulic motor is connected to the transmission shaft through a spline. The lower end of the transmission shaft passes through the fabric disc and is connected to the impeller.

[0016] As a preferred embodiment of the present invention, a lifting frame is slidably connected to the frame, the lifting frame is connected to the drive shaft, and the lifting frame is connected to the fabric disc through a lifting hydraulic cylinder. The lifting hydraulic cylinder can drive the lifting frame to move the drive shaft and the impeller up and down.

[0017] As a preferred embodiment of the present invention, the container body includes an upper end cap, a lower end cap, a cylinder, a jacket, and a heat insulation layer. The upper end cap and the lower end cap are respectively connected to the upper and lower ends of the cylinder, the jacket is connected to the outer wall of the cylinder, and the heat insulation layer is disposed on the outer wall of the jacket.

[0018] This invention also provides a process equipment for concentrated acid aging and leaching of mineral powder, including the aforementioned concentrated acid aging and leaching reaction device for mineral powder, as well as a concentrated acid conveying mechanism, a mineral powder feeding mechanism, and a leaching slurry-process water circulation mechanism; the mineral powder feeding mechanism includes a blower, a pneumatic conveying device, and a metering screw feeder, the blower being connected to the pneumatic conveying device, the pneumatic conveying device being connected to the metering screw feeder, and the mineral powder being connected to the mineral powder inlet on the container body through the pneumatic conveying device and the metering screw feeder; the concentrated acid conveying mechanism includes acid conveying devices connected in sequence. The system includes a storage tank, a screw pump, and a microporous filter, with the microporous filter connected to a concentrated acid inlet on the container body. The leaching slurry-process water circulation mechanism comprises a slurry buffer tank, a first delivery pump, a settling and clarification tank, a leaching agent storage tank, and a second delivery pump connected in sequence. The inlet end of the slurry buffer tank is connected to the slurry discharge port at the bottom of the container body. The second delivery pump is connected to the process water inlet on the container body. The clarified liquid outlet of the settling and clarification tank is connected to the second delivery pump, which then delivers the leaching agent process water to the distribution pipe of the container body.

[0019] Compared with the prior art, the present invention has the following positive effects:

[0020] The present invention provides an apparatus for the concentrated acid curing-leaching reaction of mineral powder, comprising a container body, an acidification mixing mechanism, and a leaching mechanism. The acidification mixing mechanism is located at the top of the container body, and the leaching mechanism is located at the bottom of the container body. The mineral powder and concentrated acid enter the interior of the container body from the top of the container body and are mixed and acidified at the top of the container body by the acidification mixing mechanism. The acidified material falls to the bottom of the container body and is leached by the solvent through the leaching mechanism. The leached material is then conveyed out from the bottom of the container body. The concentrated acid ripening-leaching reaction device of this invention integrates the acidification mixing mechanism and the leaching mechanism into the same container body, eliminating the need for material transfer after the mineral powder has undergone concentrated acid ripening. This allows for continuous online leaching, simplifying the concentrated acid ripening and leaching process and shortening the operation cycle. It also avoids the transfer of materials after concentrated acid ripening, effectively solving the problem of material transfer, especially the difficulty in transferring the thin, paste-like slurry after concentrated acid ripening. Furthermore, it fully utilizes the heat generated by the material after concentrated acid ripening for the leaching process, simplifying the leaching equipment. Combining the two processes into one device makes waste gas reception and treatment simpler and more environmentally friendly. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of the mineral powder concentrated acid ripening-leaching reaction device of the present invention;

[0023] Figure 2 for Figure 1 Cross-sectional view of section II-II;

[0024] Figure 3 for Figure 1 Cross-sectional view of section I-I;

[0025] Figure 4 for Figure 3 Cross-sectional view of section III-III;

[0026] Figure 5 This is a top view of the impeller in this invention;

[0027] Figure 6 This is a longitudinal cross-sectional view of the impeller in this invention;

[0028] Figure 7 The present invention relates to a process equipment for the concentrated acid aging and leaching of mineral powder.

[0029] In the diagram: 1. Boiler; 2. Microporous filter; 3. Screw pump; 4. Acid storage tank; 5. Pneumatic conveying equipment; 6. Blower; 7. Metering screw feeder; 8. Mineral powder concentrated acid curing-leaching reaction device; 80. Container body; 801. Lower head; 802. Upper head; 803. Cylinder; 804. Mineral powder inlet; 805. Concentrated acid inlet; 806. Process water inlet; 807. Slurry outlet; 808. Heat transfer medium inlet; 809. Heat transfer medium outlet; 82. Acid conveying pipe; 83. Jacket; 84. Insulation layer; 85. Non-powered mixer; 86. Atomizing turbine; 861. Power gear; 87. Connecting shaft; 88. Mineral powder separator. 89. Dispersant; 810. High-speed nozzle; 811. Arch breaker; 812. Hydraulic motor; 813. Lifting frame; 814. Impeller mechanical seal; 815. Distribution disc; 816. Through hole; 817. Impeller; 818. Hub; 819. Lower blade; 810. Impeller disc; 811. Upper blade; 811. Sealing ring; 810. Hydraulic pipeline; 811. Liquid distribution pipe; 812. Liquid outlet; 813. Lifting hydraulic cylinder; 814. Frame; 825. Drive shaft; 91. First delivery pump; 92. Second delivery pump; 93. Third delivery pump; 10. Leaching agent storage tank; 11. Settling and clarification tank; 12. Slurry buffer storage tank. Detailed Implementation

[0030] In the description of this invention, it should be noted that, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying it, 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, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0031] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0032] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0033] Example 1:

[0034] This embodiment provides an apparatus for the concentrated acid ripening-leaching reaction of mineral powder, such as... Figures 1-7 As shown, the system includes a container body 80, an acidification and mixing mechanism, and a leaching mechanism. The acidification and mixing mechanism is located at the top of the container body 80, and the leaching mechanism is located at the bottom of the container body 80. Mineral powder and concentrated acid enter the container body 80 from the top and are mixed and acidified at the top by the acidification and mixing mechanism. The acidified material falls to the bottom of the container body 80 and is leached by the solvent leaching mechanism. The leached material is then conveyed out from the bottom of the container body 80.

[0035] The concentrated acid ripening-leaching reaction device in this embodiment combines the acidification mixing mechanism and the leaching mechanism in the same container body 80. This eliminates the need for material transfer after the mineral powder has been ripened in concentrated acid, allowing for continuous online leaching. This simplifies the operation process of concentrated acid ripening and leaching, shortens the work cycle, and avoids the transfer of materials after concentrated acid ripening. It effectively solves the problem of material transfer after concentrated acid ripening, especially the difficulty in transferring the thin, paste-like slurry material. Furthermore, it can fully utilize the heat generated by the material after concentrated acid ripening for the leaching process, simplifying the leaching equipment. Combining the two processes into one device makes waste gas reception and treatment simpler and more environmentally friendly.

[0036] Preferably, such as Figures 1-2 As shown, the acidification mixing mechanism includes a non-powered mixer 85, an atomizing turbine 86, a connecting shaft 87, a mineral powder disperser 88, and multiple high-speed nozzles 89. The non-powered mixer 85 is rotatably connected to the connecting shaft 87 via bearings. The atomizing turbine 86 is connected to the upper end of the non-powered mixer 85. Multiple high-speed nozzles 89 are arranged around the atomizing turbine 86, with the outlets of the high-speed nozzles 89 facing the atomizing turbine 86. The mineral powder disperser 88 is located above the non-powered mixer 85, with its outlets distributed around its bottom surface. Multiple power teeth 861 are arranged around the atomizing turbine 86. The concentrated acid sprayed from the high-speed nozzles 89 impacts the power teeth 861, driving the atomizing turbine 86 and the non-powered mixer 85 to rotate synchronously. The mineral powder flowing down from the outlet of the mineral powder disperser 88 mixes with the concentrated acid on the non-powered mixer 85. The mineral powder disperser 88 is a container for holding mineral powder. The mineral powder disperser 88 is fixed to the top of the connecting shaft 87 by a tapered pipe thread. Three to eight high-speed nozzles 89 can be installed on the lower side of the mineral powder disperser 88. The deflection angle α of the high-speed nozzles 89 is determined according to the number of power teeth 861 of the atomizing turbine 86.

[0037] The acid impact atomizing turbine 86, ejected from the high-speed nozzle 89, drives the non-powered mixer 85 to rotate synchronously. Simultaneously, the liquid column ejected from the high-speed nozzle 89 is impacted and atomized by the atomizing turbine 86, forming a liquid film on the surface of the non-powered mixer 85. This film then mixes evenly with the mineral powder flowing down from around the mineral powder disperser 88, thus acidifying the mineral powder. The acidified material, subjected to centrifugal force by the non-powered mixer 85, is thrown against the inner wall of the container body 80 for further mixing.

[0038] In this embodiment, a combination of a non-powered mixer 85 and an atomizing turbine 86 is used to convert the outlet pressure head during concentrated acid atomization into mechanical energy for mixing, thus reasonably reducing operating costs. During the mixing process, the non-powered mixer 85 rotates radially perpendicular to the material movement direction, changing the original linear motion trajectory of the material into a spiral, scattering sedimentation, which prolongs the mixing time of concentrated acid and mineral powder and improves acidification mixing efficiency. Compared with the traditional concentrated acid maturation method using a disc mixer for concrete, this device can achieve continuous concentrated acid maturation of mineral powder. By adjusting the flow rate of concentrated acid entering the high-speed nozzle 89, the acid-to-mineral ratio can be changed, the process parameters are simple to adjust, the agitator is eliminated during the acidification process, and the operating energy consumption is low.

[0039] Preferably, the diameter of the non-powered mixer 85 gradually increases from its top to its bottom. The non-powered mixer 85 is coaxially connected to the connecting shaft 87, and the outlet of the mineral powder disperser 88 corresponds to the inclined surface of the non-powered mixer 85. The non-powered mixer 85 is a spherical cone, and the atomizing turbine 86 is fixed on the small-diameter spherical cap surface of the non-powered mixer 85. The spherical cone shape of the non-powered mixer 85 allows concentrated acid to form a liquid film on its inclined surface, enabling it to fully mix and contact with the mineral powder falling on the inclined surface, providing sufficient mixing time for the concentrated acid and mineral powder, and improving mixing efficiency.

[0040] Preferably, the connecting shaft 87 is hollow inside. The bottom end of the connecting shaft 87 is connected to the concentrated acid delivery mechanism on the outside of the container body through the acid delivery pipe 82, and the top end of the connecting shaft 87 is connected to the high-speed nozzle 89. The connecting shaft 87 is connected to the container body 80 through a bracket. The bracket is fixed to the upper end of the container body 80 as a whole.

[0041] In this embodiment, the connecting shaft 87 is hollow. On the one hand, it supports and connects the non-powered mixer 85, the atomizing turbine 86 and the mineral powder disperser. On the other hand, it acts as a pipeline to facilitate the transfer of concentrated acid to the high-speed nozzle 89, reducing the amount of piping required and minimizing the space occupied inside the container body 80. This results in a more compact and reasonable space arrangement.

[0042] Preferably, the leaching mechanism includes a feeding disc 814, an impeller 815, and a liquid distribution pipe 817. The feeding disc 814 is arranged along the cross-section of the container body, and the impeller 815 is located on the lower side of the feeding disc 814. Multiple through holes 8141 are provided on the feeding disc 814, through which the acidified material falls onto the impeller 815. The liquid distribution pipe 817 is located on the feeding disc 814 inside the through holes 8141. Multiple outlet holes 8171 are provided on the bottom side of the liquid distribution pipe 817, and perforations are provided on the feeding disc 814 corresponding to the outlet holes 8171. The liquid in the liquid distribution pipe 817 flows to the impeller 815 through the outlet holes 8171 and the perforations, forming a liquid film on the impeller 815. The rotation of the impeller 815 drives the liquid film to wash over the acidified material. The liquid distribution pipe 817 provides a stable leaching liquid to the impeller 815.

[0043] In this embodiment, the impeller 815 at the bottom of the container body 80 continuously washes the acidified viscous material through the generated liquid film, which cuts and breaks down the viscous material, thereby leaching the material with solvent. The leaching process is continuous and controllable, and there is no need to configure a large-volume leaching tank, which greatly reduces the power consumption of the agitator and reduces equipment investment.

[0044] Preferably, such as Figure 5 As shown, the impeller 815 includes a hub 8151, lower blades 8152, an impeller disk 8153, and a sealing ring 8155. The lower blades 8152 are radially distributed around the hub 8151, the impeller disk 8153 is connected to the outer periphery of the lower blades 8152, and the sealing ring 8155 is located on the inner side of the impeller disk 8153. The lower blades 8152 support the impeller disk 8153. Multiple upper blades 8154 are provided on the upper surface of the impeller disk 8153, and the upper blades 8154 have an involute shape structure from the inside out. A circular sealing plate can be provided in the middle part of the lower blades 8152, which engages with the inner edge of the impeller disk 8153 to seal the upper side of the lower blades 8152.

[0045] The upper blade 8154 is positioned below the through hole 8141 of the material distribution plate 814, and the area between the sealing ring 8155 and the upper blade 8154 is positioned below the liquid outlet 8171. The leachate flowing out of the liquid outlet 8171 flows to the area between the sealing ring 8155 and the upper blade 8154 and forms a liquid film. As the impeller 815 rotates, the liquid film flows outward to the upper blade 8154 area. The acidified material falls through the through hole 8141 to the upper blade 8154 area of ​​the impeller 815 and is thoroughly mixed and reacted with the liquid film by the scouring action of the liquid film.

[0046] The impeller 815 has 10-50 upper blades 8154 on its upper side. The upper blades 8154 can rub and disperse viscous materials falling onto the impeller 815, thereby enhancing the leaching intensity of the liquid film. The impeller 815 has 3-12 lower blades 8152 on its lower side. The lower blades are one of the following: arc blades, curved blades, oblique blades, or straight blades. They are used to stir and agitate the slurry below, thereby enhancing the self-circulation of the leached slurry.

[0047] Preferably, an arch breaker 810 is provided on the upper side of the distribution plate 814, and the arch breaker 810 is a conical shell. The arch breaker 810 is connected to the distribution plate 814, forming an equipment compartment between the arch breaker 810 and the distribution plate 814. A hydraulic motor 811 and a frame 819 are provided in the equipment compartment. The hydraulic motor 811 is connected to the frame 819, and the output shaft of the hydraulic motor 811 is connected to the drive shaft 820 via a spline. The lower end of the drive shaft 820 passes through the distribution plate 814 and is connected to the impeller 815. The lower end of the drive shaft 820 is connected to the center of the distribution plate 814 via an impeller mechanical seal 813. The impeller mechanical seal 813 is fixed on the central circle of the shaft on the reverse side of the distribution plate 814 to prevent the leachate slurry from entering the equipment compartment. The arch breaker 810 is mounted on the distribution plate 814 using a flange. The arch breaker 810 is cone-shaped to prevent the acidified material from accumulating on it, facilitating the material's fall from the through-hole 8141 of the distribution plate 814 onto the impeller 815. The hydraulic motor 811 is a low-speed hydraulic motor that provides power to the impeller 815. The hydraulic motor 811 drives the impeller 815 to rotate radially. Adjusting the rotational speed of the liquid film leaching impeller 815 controls the liquid film thickness; the higher the rotational speed of the impeller 815, the thinner the liquid film on the impeller 815.

[0048] Preferably, a lifting frame 812 is slidably connected to the frame 819. The lifting frame 812 is connected to the drive shaft 820 and is connected to the material distribution plate 814 via a lifting hydraulic cylinder 818. The lifting hydraulic cylinder 818 can drive the lifting frame 812 to move the drive shaft 820 and the impeller 815 up and down. The lifting hydraulic cylinder 818 provides lifting power and changes the distance between the impeller 815 and the material distribution plate 814. The lifting range h is 0-50mm. The lifting hydraulic cylinder 818 is supplied with liquid by a hydraulic pipeline 816. Adjusting the distance between the impeller 815 and the material distribution plate 814 controls the liquid film leaching intensity. The greater the distance between the impeller 815 and the material distribution plate 814, the higher the liquid film leaching intensity.

[0049] When the mineral powder is acidified, the impeller 815 can be pressed against the lower side of the material distribution plate 814 by the lifting hydraulic cylinder 818 to block the through hole 8141, so that the acidified material remains on the material distribution plate 814. After the reaction has been carried out for a certain period of time, the leaching operation is carried out, which makes it easier to control the acidification and leaching time.

[0050] Preferably, the frame 819 includes a top plate and four lifting guide rods. The top plate is connected to the top of the four lifting guide rods, the bottom of the lifting guide rods is connected to the fabric tray 814, the hydraulic motor 811 is connected to the top plate, and the four corners of the lifting frame 812 are slidably connected to the lifting guide rods.

[0051] Preferably, the container body 80 includes an upper end cap 802, a lower end cap 801, a cylindrical body 803, a jacket 83, and a heat insulation layer 84. The upper end cap 802 and the lower end cap 801 are respectively connected to the upper and lower ends of the cylindrical body 803, the jacket 83 is connected to the outer wall of the cylindrical body 803, and the heat insulation layer 84 is disposed on the outer wall of the jacket 83.

[0052] In this embodiment, the cylinder 803 is a conical structure with its diameter gradually increasing from the top to the bottom, with a taper range of 1:5-50. A suitable taper is selected based on the cylinder height. The inner wall is mirror-finished, and the inner wall of cylinder 803 is precision ground to achieve the 8K precision grinding requirement (mirror finish), effectively preventing the material from forming a crust on the cylinder wall after concentrated acid curing. The material distribution plate 814 is fixed to the large-diameter end of cylinder 803. The end faces of the upper end cap 802 and the lower end cap 801 are elliptical and are connected and fixed to the flange of cylinder 803 using a convex flange. The jacket 83 can be in the form of an outer coil, a jacket, etc., welded to the outer wall of cylinder 803. The insulation layer 84 is fixed to the outer wall of the jacket 83, and its thickness is determined according to the design temperature.

[0053] This embodiment provides a process device for the concentrated acid ripening-leaching of mineral powder, such as... Figure 7 As shown, the apparatus includes the aforementioned concentrated acid aging-leaching reaction device 8 for mineral powder, as well as a concentrated acid conveying mechanism, a mineral powder feeding mechanism, and a leaching slurry-process water circulation mechanism. The mineral powder feeding mechanism includes a blower 6, a pneumatic conveying device 5, and a metering screw feeder 7. The blower 6 is connected to the pneumatic conveying device 5, which is connected to the metering screw feeder 7. The mineral powder is connected to the mineral powder inlet 804 on the container body 80 via the pneumatic conveying device 5 and the metering screw feeder 7. The mineral powder inlet 804 is connected to the mineral powder disperser 88, and the mineral powder is conveyed to the mineral powder disperser 88 via the pneumatic conveying device 5 and the metering screw feeder 7.

[0054] The concentrated acid conveying mechanism includes an acid storage tank 4, a screw pump 3, and a microporous filter 2 connected in sequence. The microporous filter 2 is connected to the concentrated acid inlet 805 on the container body 80. The concentrated acid inlet 805 is connected to the acid delivery pipe 82. The concentrated acid is provided by the acid storage tank 4 through the screw pump 3, filtered by the microporous filter 2, and then conveyed to the acid delivery pipe 82.

[0055] The leaching slurry-process water circulation mechanism includes a slurry buffer storage tank 12, a first transfer pump 91, a settling and clarification tank 11, a leaching agent storage tank 10, and a second transfer pump 92 connected in sequence. The inlet end of the slurry buffer storage tank 12 is connected to the slurry discharge port 807 at the bottom of the container body 80. The second transfer pump 92 is connected to the process water inlet 806 on the container body 80. The process water inlet 806 is connected to the liquid distribution pipe 817. The clarified liquid outlet of the settling and clarification tank 11 is connected to the second transfer pump 92, and the leaching agent process water is transferred to the liquid distribution pipe 817 of the container body 80 through the second transfer pump 92. After leaching, the material is discharged from the slurry outlet 807 at the bottom of the container body 80 and conveyed to the slurry buffer storage tank 12 to reduce the unevenness of the flow in the discharge pipeline and avoid excessive flow to meet the needs of the process flow. Then it is conveyed to the settling and clarifying tank 11 for settling, so that the solution and solid matter are separated. The solid sediment is discharged from the system and the clarified liquid is conveyed to the leaching agent storage tank 10 and then circulated into the liquid distribution pipe 817 of the container body 80.

[0056] Preferably, the process equipment for concentrated acid ripening and leaching of mineral powder in this embodiment further includes a steam circulation mechanism. The steam circulation mechanism includes a boiler 1 and a third transfer pump 93. The heat transfer medium outlet 809 at the upper end of the jacket 83 is connected to the boiler 1, and one end of the third transfer pump 93 is connected to the boiler 1, while the other end is connected to the heat transfer medium inlet 808 at the lower end of the jacket 83. When the leaching reaction requires a specific temperature range, and the temperature inside the container body 80 cannot meet the reaction requirements, hot steam can be introduced into the jacket 83 to heat the container body 80 and increase the temperature inside the container body 80. In addition, other heat transfer media, such as water or oil, can also be introduced into the jacket 83 for heat exchange.

[0057] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications and improvements made by those skilled in the art without departing from the inventive concept of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A device for concentrated acid ripening-leaching reaction of mineral powder, characterized in that, The container includes a container body (80), an acidification mixing mechanism, and a leaching mechanism. The acidification mixing mechanism is located at the top of the container body (80), and the leaching mechanism is located at the bottom of the container body (80). Mineral powder and concentrated acid enter the interior of the container body (80) from the top of the container body (80) and are mixed and acidified at the top of the container body (80) by the acidification mixing mechanism. The acidified material falls to the bottom of the container body (80) and is leached by the solvent through the leaching mechanism. The leached material is then conveyed out from the bottom of the container body (80). The acidification mixing mechanism includes a non-powered mixer (85), an atomizing turbine (86), a connecting shaft (87), a mineral powder disperser (88), and multiple high-speed nozzles (89). The non-powered mixer (85) is rotatably connected to the connecting shaft (87) via bearings. The atomizing turbine (86) is connected to the upper end of the non-powered mixer (85). The multiple high-speed nozzles (89) are arranged around the atomizing turbine (86), and the outlets of the high-speed nozzles (89) are oriented towards the atomizing turbine (86). The mineral powder disperser (88) is positioned above the non-powered mixer (85), and the outlet of the mineral powder disperser (88) is distributed around its bottom surface. Multiple power teeth (861) are arranged around the atomizing turbine (86). The concentrated acid sprayed by the high-speed nozzle (89) impacts the power teeth (861) and drives the atomizing turbine (86) and the non-powered mixer (85) to rotate synchronously. The mineral powder flowing down from the outlet of the mineral powder disperser (88) mixes with the concentrated acid on the non-powered mixer (85). The leaching mechanism includes a material distribution plate (814), an impeller (815), and a liquid distribution pipe (817). The material distribution plate (814) is arranged along the cross-section of the container body. The impeller (815) is located on the lower side of the material distribution plate (814). Multiple through holes (8141) are provided on the material distribution plate (814). The acidified material falls onto the impeller (815) through the through holes (8141). The liquid distribution pipe (817) is located at the through holes (8141). 1) On the inner side of the cloth disc (814), a plurality of liquid outlet holes (8171) are provided on the bottom side of the liquid distribution pipe (817). A perforation is provided on the cloth disc (814) corresponding to the position of the liquid outlet hole (8171). The liquid in the liquid distribution pipe (817) flows to the impeller (815) through the liquid outlet hole (8171) and the perforation and forms a liquid film on the impeller (815). The impeller (815) rotates and drives the liquid film to flush the acidified material.

2. The apparatus for concentrated acid ripening-leaching reaction of mineral powder according to claim 1, characterized in that, The diameter of the non-powered mixer (85) gradually increases from its top to its bottom. The non-powered mixer (85) is coaxially connected to the connecting shaft (87). The outlet of the mineral powder disperser (88) corresponds to the inclined surface of the non-powered mixer (85).

3. The apparatus for concentrated acid ripening-leaching reaction of mineral powder according to claim 1, characterized in that, The connecting shaft (87) is hollow inside. The bottom end of the connecting shaft (87) is connected to the concentrated acid delivery mechanism on the outside of the container body through the acid delivery pipe (82). The top end of the connecting shaft (87) is connected to the high-speed nozzle (89). The connecting shaft (87) is connected to the container body (80) through a bracket.

4. The apparatus for concentrated acid ripening-leaching reaction of mineral powder according to claim 1, characterized in that, The impeller (815) includes a hub (8151), lower blades (8152), an impeller disk (8153), and a sealing ring (8155). The lower blades (8152) are radially distributed around the hub (8151). The impeller disk (8153) is connected to the outer periphery of the lower blades (8152). The sealing ring (8155) is disposed on the inner side of the impeller disk (8153). Multiple upper blades (8154) are disposed on the upper side of the impeller disk (8153). The upper blades (8154) have an involute structure from the inside to the outside.

5. The apparatus for concentrated acid ripening-leaching reaction of mineral powder according to claim 1, characterized in that, An arch breaker (810) is provided on the upper side of the fabric disc (814). The arch breaker (810) is a conical shell. The arch breaker (810) is connected to the fabric disc (814) and forms an equipment compartment between the arch breaker (810) and the fabric disc (814). A hydraulic motor (811) and a frame (819) are provided in the equipment compartment. The hydraulic motor (811) is connected to the frame (819). The output shaft of the hydraulic motor (811) is connected to the transmission shaft (820) by a spline. The lower end of the transmission shaft (820) passes through the fabric disc (814) and is connected to the impeller (815).

6. The apparatus for concentrated acid ripening-leaching reaction of mineral powder according to claim 5, characterized in that, A lifting frame (812) is slidably connected to the frame (819). The lifting frame (812) is connected to the drive shaft (820). The lifting frame (812) is connected to the fabric disc (814) through a lifting hydraulic cylinder (818). The lifting hydraulic cylinder (818) is used to drive the lifting frame (812) to move the drive shaft (820) and the impeller (815) up and down.

7. The apparatus for concentrated acid ripening-leaching reaction of mineral powder according to claim 1, characterized in that, The container body (80) includes an upper end cap (802), a lower end cap (801), a cylindrical body (803), a jacket (83), and a heat insulation layer (84). The upper end cap (802) and the lower end cap (801) are respectively connected to the upper and lower ends of the cylindrical body (803). The jacket (83) is connected to the outer wall of the cylindrical body (803). The heat insulation layer (84) is disposed on the outer wall of the jacket (83).

8. A process equipment for concentrated acid ripening-leaching of mineral powder, characterized in that, The apparatus includes the mineral powder concentrated acid ripening-leaching reaction device (8) as described in any one of claims 1-7, as well as a concentrated acid conveying mechanism, a mineral powder feeding mechanism, and a leaching slurry-process water circulation mechanism; the mineral powder feeding mechanism includes a blower (6), a pneumatic conveying device (5), and a metering screw feeder (7), the blower (6) being connected to the pneumatic conveying device (5), the pneumatic conveying device (5) being connected to the metering screw feeder (7), and the mineral powder being connected to the mineral powder inlet (804) on the container body (80) through the pneumatic conveying device (5) and the metering screw feeder (7); the concentrated acid conveying mechanism includes an acid storage tank (4), a screw pump (3), and a microporous filter (2) connected in sequence, the microporous filter (2) The leaching slurry-process water circulation mechanism includes a slurry buffer tank (12), a first delivery pump (91), a settling and clarification tank (11), a leaching agent tank (10), and a second delivery pump (92) connected in sequence. The inlet end of the slurry buffer tank (12) is connected to the slurry outlet (807) at the bottom of the container body (80). The second delivery pump (92) is connected to the process water inlet (806) on the container body (80). The clarified liquid outlet of the settling and clarification tank (11) is connected to the second delivery pump (92) and the leaching agent process water is delivered to the liquid distribution pipe (817) of the container body (80) through the second delivery pump (92).

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