A calcined ore coarse particle recovery system

Abstract

This utility model discloses a coarse particle recovery system for calcined ore, comprising a feeding hopper, a clinker elevator, a clinker silo, a chain plate scale, a wet ball mill, a slurry tank, a leaching tank, a filter press, and a clarification tank. The feeding hopper is connected to the feed end of the clinker elevator, and the clinker silo is connected to the discharge end of the clinker elevator. The chain plate scale is installed between the clinker silo and the wet ball mill for conveying and metering the granular calcined ore. The slurry tank is connected to the discharge port of the wet ball mill. The leaching tank is connected to the slurry tank via a pipeline, and the discharge port of the leaching tank is connected to the feed port of the filter press. The clarification tank is connected to the filtrate outlet of the filter press. This utility model enables the recovery and reuse of coarse particle calcined ore. The resulting filter cake can be directly used in the nitric acid phosphate fertilizer workshop, saving production costs and solving the problem of occupying warehouse space in the nitric acid phosphate fertilizer workshop.

Description

Technical Field

[0001] This utility model relates to the field of phosphate rock processing technology, specifically to a system for recovering coarse particles from calcined ore. Background Technology

[0002] Medium and low grade phosphate rock refers to phosphate rock with a P2O5 content of less than 30%, which needs to be beneficiated to obtain phosphate concentrate powder.

[0003] Nitric acid phosphate fertilizer refers to a nitrogen-phosphorus binary compound fertilizer produced by decomposing phosphate concentrate powder with nitric acid or a mixed acid with nitric acid as the main component, followed by ammoniation treatment. Phosphate concentrate powder is obtained through beneficiation of raw phosphate ore. In existing phosphate ore beneficiation processes, the phosphate ore after physical beneficiation is calcined, and then transported to the nitric acid phosphate fertilizer workshop for production. In actual production, because the phosphate ore from physical beneficiation has a moisture content of 14% during the filter press feeding process, granular ore is produced as it rolls down. During the calcination process in the dry beneficiation workshop through the rotary kiln, large calcined ore particles are produced. After being transported to the nitric acid phosphate fertilizer workshop, the calcined ore is sieved, and the fine powder is used directly, while the coarse particles cannot be used, occupying inventory and increasing storage costs. Utility Model Content

[0004] In order to overcome the shortcomings of the existing technology, this utility model provides a coarse particle recovery system for calcined ore to solve the problem that coarse particle calcined ore cannot be used in nitrate phosphate fertilizer workshops, thus occupying the warehouse inventory of nitrate phosphate fertilizer workshops.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] A coarse particle recovery system for calcined ore includes a feeding hopper, a clinker elevator, a clinker silo, a chain scale, a wet ball mill, a slurry tank, a leaching tank, a filter press, and a clarification tank. The feeding hopper is connected to the feed end of the clinker elevator, the clinker silo is connected to the discharge end of the clinker elevator, the chain scale is installed between the clinker silo and the wet ball mill for conveying and metering the calcined ore particles, the slurry tank is connected to the discharge port of the wet ball mill, the leaching tank is connected to the slurry tank via a pipeline, the discharge port of the leaching tank is connected to the feed port of the filter press, and the clarification tank is connected to the filtrate outlet of the filter press.

[0007] As a further improvement to the above technical solution, the leaching tank is located directly above the filter press, the outlet of the leaching tank is located at the bottom of the leaching tank, the outlet of the leaching tank is connected to the inlet of the filter press through pipe A, and a valve A is installed on pipe A.

[0008] As a further improvement to the above technical solution, a water pump A is provided between the slurry tank and the leaching tank. The water pump A is connected to an inlet pipe A and an outlet pipe A. The inlet of the inlet pipe A is placed inside the slurry tank, and the outlet of the outlet pipe A is placed inside the leaching tank.

[0009] As a further improvement to the above technical solution, the leaching tank is connected to a tank cover, and a stirring mechanism is provided at the bottom of the tank cover. The stirring blades of the stirring mechanism are located inside the leaching tank, and the stirring mechanism is used to stir the phosphate slurry in the leaching tank.

[0010] As a further improvement to the above technical solution, the slurry tank is located on the bottom surface and extends underground, the wet ball mill is located on the ground, and the discharge port of the wet ball mill is located directly above the slurry tank.

[0011] As a further improvement to the above technical solution, the calcined ore coarse particle recovery system also includes a clarification tank and an underground tank. The clarification tank is connected to the clarification tank, the clarification tank is connected to the underground tank, and the underground tank is connected to the water inlet of the wet ball mill.

[0012] As a further improvement to the above technical solution, a water pump B is provided between the clarification tank and the clear liquid tank. The water pump B is connected to an inlet pipe B and an outlet pipe B. The inlet of the inlet pipe B is placed in the clarification tank, and the outlet of the outlet pipe B is placed in the clear liquid tank.

[0013] As a further improvement to the above technical solution, the calcined ore coarse particle recovery system also includes a lifting mechanism, which is used to drive the water inlet pipe B to move in the vertical direction to adjust the height of the water inlet pipe B in the clarification tank.

[0014] As a further improvement to the above technical solution, a water pump C is provided between the underground tank and the wet ball mill. The water pump C is connected to an inlet pipe C and an outlet pipe C. The inlet of the inlet pipe C is placed inside the underground tank, and the outlet of the outlet pipe C is connected to the inlet of the wet ball mill.

[0015] As a further improvement to the above technical solution, the outlet at the bottom of the clear liquid tank is connected to the inlet of the underground tank through pipe B, and a valve B is installed on pipe B.

[0016] The beneficial effects of this utility model are as follows: The coarse particle recovery system for calcined ore of this utility model can realize the recycling and use of coarse particle calcined ore. The resulting filter cake can be directly used in the nitric acid phosphate fertilizer workshop, thereby solving the problem of waste caused by the inability of the nitric acid phosphate fertilizer workshop to use coarse particle calcined ore, thus saving production costs. According to the ore beneficiation design production capacity of 500 tons / day, the coarse particle calcined ore produced is 25 tons, which can save more than 500,000 yuan per month. At the same time, it solves the problem of occupying the warehouse inventory of the nitric acid phosphate fertilizer workshop. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] Figure 1 This is a diagram showing the connection relationships of various structures in a calcined ore coarse particle recovery system according to this utility model.

[0019] Reference numerals in the attached drawings: 1. Feed hopper; 2. Clinker elevator; 3. Clinker silo; 4. Chain plate scale; 5. Wet ball mill; 6. Slurry tank; 7. Water pump A; 8. Leaching tank; 9. Stirring mechanism; 10. Valve A; 11. Filter press; 12. Clarification tank; 13. Clear liquid tank; 14. Water pump B; 15. Lifting mechanism; 16. Valve B; 17. Underground tank; 18. Water pump C. Detailed Implementation

[0020] The following will clearly and completely describe the concept, specific structure, and technical effects of this utility model in conjunction with embodiments and accompanying drawings, so as to fully understand the purpose, features, and effects of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. Other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are all within the scope of protection of this utility model. Furthermore, all connections / connections involved in the patent do not simply refer to direct contact between components, but rather to the ability to form a better connection structure by adding or reducing connecting accessories according to specific implementation conditions. For example, fixed connections / fixed installations can use screw connections, bolt connections, pin connections, key connections, adhesive connections, mortise and tenon connections, welding, riveting, etc., as needed. For detachable connections, screw connections, bolt connections, threaded connections, snap-fit ​​connections, mortise and tenon connections, Velcro connections, etc., can be used as needed. The various technical features in this utility model can be combined interactively without contradicting each other.

[0021] Reference Figure 1 This utility model provides a coarse particle recovery system for calcined ore, including a feeding hopper 1, a clinker elevator 2, a clinker silo 3, a chain scale 4, a wet ball mill 5, a slurry tank 6, a leaching tank 8, a filter press 11, a clarification tank 12, a lifting mechanism 15, a clear liquid tank 13, and an underground tank 17. The feeding hopper is connected to the feed end of the clinker elevator 2, the clinker silo 3 is connected to the discharge end of the clinker elevator 2, the chain scale 4 is installed between the clinker silo 3 and the wet ball mill 5 for conveying and metering the calcined ore particles, the slurry tank 6 is connected to the discharge port of the wet ball mill 5, the leaching tank 8 is connected to the slurry tank 6 via a pipe, the discharge port of the leaching tank 8 is connected to the feed port of the filter press 11, and the clarification tank 12 is connected to the filtrate outlet of the filter press 11.

[0022] Among them, the clinker elevator 2 refers to a continuous material handling equipment with vertical conveying capability, which can be a bucket elevator or a plate chain elevator, used to realize the mechanized transfer of coarse calcined ore from the ground to a high-level silo. The chain plate scale 4 refers to a belt conveyor equipped with a weighing sensor, which can be an electronic metering belt scale, used to accurately control the amount of material entering the wet grinding process. The wet ball mill 5 refers to a water-cooled pulverizing device with built-in grinding media, which can be an overflow ball mill, using water-assisted grinding to convert coarse particles into slurry material. The slurry tank 6 refers to an open container for temporarily storing fluid materials, which can be a concrete-lined structure, providing buffer storage for subsequent leaching processes. The clarification tank 12 refers to a liquid treatment device with sedimentation and phase separation function, which can be an inclined plate sedimentation tank, used to separate suspended impurities in the filtrate.

[0023] Specifically, coarse-grained calcined ore is first conveyed into a high-level clinker silo 3 via a conveyor system to avoid dust pollution caused by open-air storage. A chain scale 4 monitors the feed weight in real time; when the feed rate exceeds a set threshold per unit time, it automatically adjusts the feeding speed to ensure the stability of the wet grinding process. Inside the wet ball mill 5, the collision and friction between the steel balls and the ore reduces the particle size to a suspended state, forming a highly fluid slurry. The slurry flows by gravity into the slurry tank 6, utilizing the elevation difference for non-powered conveying. The slurry in the slurry tank 6 is pumped to the leaching tank 8, where it is stirred and mixed before being evenly injected into the filter press 11. The filter cake can be directly used for the production of nitric acid phosphate fertilizer. The clarified supernatant in the clarification tank 12 is pumped back to the wet ball mill 5, forming a process water circulation loop and reducing the need for fresh water replenishment.

[0024] Currently, the workshop stores coarse calcined ore as waste, which not only occupies storage space but also wastes phosphate resources. This invention changes the material's form through wet grinding, transforming the previously unusable coarse calcined ore into qualified raw material. Simultaneously, it establishes a water-material dual-cycle system, reducing water consumption while addressing inventory issues. Furthermore, the filtrate is reused in the grinding process, recovering residual effective components and achieving comprehensive resource utilization. In this way, the coarse calcined ore previously stockpiled in the warehouse is effectively converted into usable production raw material, significantly alleviating the raw material inventory pressure in the nitrate phosphate fertilizer workshop. The entire process forms a closed-loop material flow, reducing storage costs while improving the comprehensive utilization rate of phosphate resources.

[0025] In this embodiment, the amount of calcined granulated ore added is controlled by the chain plate scale 4, or the water volume of the wet ball mill 5 is adjusted to control the solid content of the phosphate rock slurry discharged from the wet ball mill 5 to be between 50% and 65%. Solid content refers to the percentage of solid matter mass in the phosphate rock slurry relative to the total mass of the slurry. If the solid content is too low, the slurry volume increases, leading to increased energy consumption during transport; if the solid content is too high, the slurry viscosity may be too high, hindering subsequent stirring and filtration operations. Maintaining the solid content of the discharged phosphate rock slurry at 50%-65% ensures sufficient fluidity to prevent pipe blockage, while maintaining appropriate viscosity to facilitate uniform mixing by the stirring mechanism 9 in the leaching tank. During the filtration stage, this solid content ensures a moderate moisture content in the filter cake, preventing excessive solid particles from being entrained in the filtrate and preventing the filter cake from becoming too dense, thus reducing separation efficiency.

[0026] In this embodiment, the leaching tank 8 is located directly above the filter press 11. The outlet of the leaching tank 8 is located at the bottom of the leaching tank 8. The outlet of the leaching tank 8 is connected to the inlet of the filter press 11 via pipe A, and a valve A10 is installed on pipe A. The leaching tank 8 being located directly above the filter press 11 means that the installation position of the leaching tank 8 forms a vertical height difference with respect to the filter press 11. This can be achieved using a steel frame support structure or a staggered floor arrangement, allowing the slurry to flow naturally under gravity through spatial layout. The outlet being located at the bottom of the leaching tank 8 means that the opening is located at the lowest point of the tank. This can be achieved using a conical tank bottom or an inclined bottom plate structure, ensuring complete discharge of the slurry and preventing residue in the tank. Pipe A connecting the outlet and inlet forms a closed conveying channel, which can be achieved using flanged metal pipes or wear-resistant rubber hoses, shortening the slurry conveying distance through a straight path. Among them, valve A10 installed on pipeline A refers to a control device that can adjust the flow rate. Specifically, it can be implemented by a manual gate valve, a pneumatic ball valve, or an electric regulating valve, and is used to control the slurry flow rate and block the material flow.

[0027] Specifically, after the slurry is discharged from the outlet at the bottom of the leaching tank 8, it flows vertically downwards along pipe A into the inlet of the filter press 11 under the action of gravity. This process does not require external power. The vertical or near-vertical arrangement of pipe A reduces the contact area between the slurry and the pipe wall, reducing the risk of adhesion and clogging. Valve A10 controls the slurry flow rate by adjusting its opening, ensuring that the feed rate of the filter press 11 matches its processing capacity, thus preventing damage to the filter cloth or a decrease in filtration efficiency due to excessive instantaneous flow. When maintenance of the filter press 11 is required, valve A10 can be completely closed to cut off the slurry supply.

[0028] In this embodiment, a water pump A7 is installed between the slurry tank 6 and the leaching tank 8. The water pump A7 is connected to an inlet pipe A and an outlet pipe A. The inlet of the inlet pipe A is placed inside the slurry tank 6, and the outlet of the outlet pipe A is placed inside the leaching tank 8. The slurry tank 6 is a container for storing wet-milled phosphate rock slurry, and can be implemented using an underground extended structure, allowing the slurry discharged from the wet ball mill 5 to flow naturally into the tank by gravity. The leaching tank 8 is a reaction vessel for containing the slurry and performing subsequent pressure filtration, and can be a tank structure with an open top and a discharge port at the bottom, allowing the slurry to flow by gravity through the spatial height difference. The water pump A7 is a power device for directional conveying of the slurry, and can be implemented using a centrifugal pump or a screw pump, overcoming the viscous resistance of the slurry through mechanical force. The positioning of the inlet pipe A refers to fixing the end of the pipe to the bottom area of ​​the slurry tank 6, so as to avoid slurry residue by directly contacting the sediment layer. The positioning of the outlet pipe A refers to extending the end of the pipe to below the liquid surface of the leaching tank 8, so as to prevent slurry splashing by submerging the discharge.

[0029] Specifically, the phosphate slurry deposited at the bottom of the slurry tank 6 is completely sucked in by the inlet pipe A of the water pump A7. After being pressurized by the water pump A7, it is directly discharged into the liquid inside the leaching tank 8 through the outlet pipe A. Since the end of the inlet pipe A is always at the bottom of the slurry tank 6, the sediment can be effectively extracted to avoid residue in the tank. The end of the outlet pipe A is submerged below the liquid surface of the leaching tank 8, forming a closed conveying path. This not only prevents the slurry from being exposed to air and causing volatilization loss, but also avoids leakage from the pipe opening that contaminates the equipment. This conveying method overcomes the problem of poor gravity flow caused by the high viscosity of the slurry by replacing natural gravity flow with forced circulation.

[0030] In this embodiment, the leaching tank 8 is connected to a tank cover, and a stirring mechanism 9 is provided at the bottom of the tank cover. The stirring blades of the stirring mechanism 9 are located inside the leaching tank 8, and the stirring mechanism 9 is used to stir the phosphate rock slurry in the leaching tank 8. The tank cover refers to a sealing structure covering the opening of the leaching tank 8, which can be implemented using a flanged metal cover plate to isolate the external environment from contact with the material inside the tank. The stirring mechanism 9 refers to a mixing device consisting of a drive motor and a stirring shaft, which can be implemented using a variable frequency motor and propeller-type blades. The stirring shaft vertically passes through the center of the tank cover and is connected to the motor output end through a coupling. The stirring blades refer to the mixing components installed at the end of the stirring shaft, which can be double-layered four-bladed stainless steel blades with a diameter ranging from 30% to 50% of the tank diameter.

[0031] Specifically, when the slurry is pumped into the leaching tank 8, the tank cover remains closed to prevent foreign objects from entering. The stirring mechanism 9, driven by a motor, rotates the stirring shaft, creating a circulating vortex in the slurry. During slurry injection, the stirring blades break up agglomerates of solid particles through shearing action. Continuous operation after injection eliminates stratification caused by density differences. The tank cover serves as the mounting base for the stirring mechanism 9, allowing the blades to penetrate deep into the central area of ​​the tank, avoiding dead zones caused by sidewall installation.

[0032] In this embodiment, the slurry tank 6 is located on the bottom surface and extends underground, while the wet ball mill 5 is located above ground, with its discharge port directly above the slurry tank 6. This allows the phosphate slurry from the wet ball mill 5 to be directly discharged into the slurry tank 6. The slurry tank 6 extending underground means forming a sunken receiving space below ground level. Specifically, this can be achieved by constructing a vertically deep tank structure using concrete or steel, allowing the slurry to be transported without external power through gravity. The vertical alignment of the wet ball mill 5's discharge port with the slurry tank 6 means that the ball mill's discharge port and the top opening of the slurry tank 6 are vertically connected through spatial planning. This can be achieved through equipment installation positioning measurement and support fixing, thereby eliminating the bends in the horizontal conveying pipeline.

[0033] Specifically, when the wet ball mill 5 is installed on the ground, its discharge port is vertically aligned with the top of the slurry tank 6. After being ground by the ball mill, the slurry falls freely into the tank under its own gravity. Because the slurry tank 6 extends downward to create a depth, the slurry will not splash or overflow due to impact during its descent. This layout, through spatial design, transforms traditional horizontal pipeline conveying into vertical gravity conveying, avoiding the risk of blockage caused by residual slurry clumping inside the pipeline, while also eliminating the need for a conveying pump and its associated power consumption.

[0034] In this embodiment, the clarification tank 12 is connected to the clear liquid tank 13, the clear liquid tank 13 is connected to the underground tank 17, and the underground tank 17 is connected to the inlet of the wet ball mill 5. Specifically, a water pump B14 is installed between the clarification tank 12 and the clear liquid tank 13. The inlet of the water pump B14 is placed inside the clarification tank 12, and the outlet of the water pump B14 is placed inside the clear liquid tank 13. A water pump C18 is installed between the underground tank 17 and the wet ball mill 5. The inlet of the water pump C18 is placed inside the underground tank 17, and the outlet of the water pump C18 is connected to the inlet of the wet ball mill 5. The water pump B14 is a power device used to transfer the upper clear liquid in the clarification tank 12 to the clear liquid tank 13. Specifically, a centrifugal pump or a submersible pump can be used. Its function is to replace manual transfer with mechanical suction, avoiding low liquid transport efficiency.

[0035] The inlet pipe B refers to the connecting pipe between the water pump B14 and the clarification tank 12. It can be made of corrosion-resistant polyethylene or metal. Its function is to directly extract the clear liquid from the upper layer of the clarification tank 12, preventing bottom sediment from entering the clear liquid tank 13. The outlet pipe B refers to the connecting pipe between the water pump B14 and the clear liquid tank 13. It can be a fixed pipe with a flange. Its function is to directionally transport the pumped liquid to the clear liquid tank 13, maintaining the stability of the liquid flow path. The water pump C18 is the power unit that pressurizes and transports the liquid from the underground tank 17 to the wet ball mill 5. It can be a high-pressure plunger pump. Its function is to meet the inlet water pressure requirements of the wet ball mill 5, ensuring the continuity of the grinding process. The inlet pipe C refers to the connecting pipe between the water pump C18 and the underground tank 17. It can be a rigid pipe with a filter screen. Its function is to reduce the energy consumption of liquid suction by utilizing the liquid level difference in the underground tank 17, while preventing impurities from entering the pump body. The outlet pipe C refers to the connecting pipe between the water pump C18 and the inlet of the wet ball mill 5. Specifically, it can be implemented using a threaded connection pipe with strong sealing performance. Its function is to establish a closed conveying channel to avoid liquid leakage or external contamination.

[0036] Specifically, the clarified liquid, after solid-liquid separation in the clarification tank 12, is drawn through the inlet pipe B of water pump B14 and discharged into the clear liquid tank 13 for temporary storage via the outlet pipe B. The liquid in the clear liquid tank 13 flows by gravity into the underground tank 17, where it is drawn by the inlet pipe C of water pump C18, pressurized, and directly injected into the inlet of the wet ball mill 5 through the outlet pipe C. During this process, water pump B14 enables rapid transfer of the clarified liquid, and the clear liquid tank 13 acts as a buffer to reduce the impact of liquid level fluctuations on downstream equipment. Water pump C18 compensates for the height difference between the underground tank 17 and the wet ball mill 5, maintaining constant pressure at the inlet of the wet ball mill 5. The combination of the two-stage pumping system and the directional pipeline eliminates pressure loss and intermittent delivery issues in the liquid return path.

[0037] In a preferred embodiment, the lifting mechanism 15 is used to move the inlet pipe B vertically to adjust the height of the inlet pipe B's opening within the clarification tank 12. The lifting mechanism 15 is a mechanical device capable of controlling the vertical displacement of the inlet pipe, specifically an electric actuator, hydraulic cylinder, or screw drive mechanism. Its function is to avoid the sediment layer by changing the suction position of the pipe opening. The height adjustment of the inlet pipe B refers to dynamically adjusting the suction depth based on the liquid-solid stratification state within the clarification tank 12. This can be achieved by the lifting mechanism 15 moving the pipe along the guide rail, allowing for the selection of the optimal liquid layer for suction under different operating conditions.

[0038] Specifically, after the clarification tank 12 completes the liquid clarification, a clear interface is formed between the upper clear liquid and the bottom sediment. At this time, before starting the water pump B14, the operator controls the lifting mechanism 15 according to the liquid level observation results, so that the inlet of the water pipe B is positioned in the middle of the clear liquid layer. As the pumping operation continues, the liquid level gradually drops. At this time, the position of the pipe opening can be adjusted down synchronously through the lifting mechanism 15 so that it is always within the clear liquid layer. When the liquid level approaches the sediment layer, the pipe opening is automatically raised to a safe height, effectively preventing the sediment from being sucked into the pipe.

[0039] In some specific embodiments, the push rod end of the electric push rod is rigidly connected to the wall of the water inlet pipe B, the push rod base is fixed on the top frame of the clarification tank 12, and a liquid level sensor is installed on the side wall of the clear liquid tank 13. When the liquid level is detected to drop to a preset threshold, the sensor sends a signal to the control unit to drive the push rod to move downward at a set speed. For example, when the height of the clarification tank 12 is meters, the initial liquid extraction port can be set at meters from the top of the tank, and adjusted synchronously at a speed of centimeters per minute as the liquid level drops.

[0040] In this embodiment, the outlet at the bottom of the clear liquid tank 13 is connected to the inlet of the underground tank 17 via pipe B, and a valve B16 is installed on pipe B. Pipe B refers to the liquid transport channel connecting the clear liquid tank 13 and the underground tank 17, and can be made of corrosion-resistant metal or plastic pipe. Its diameter can be selected according to the liquid flow requirements, for example, it can be a pipe with a diameter between 50 mm and 150 mm. Valve B16 refers to the flow control device installed on pipe B, and can be implemented as a manual gate valve or an electric regulating valve. For example, an electric regulating valve can automatically adjust its opening by receiving a signal from a flow sensor.

[0041] Specifically, pipe B is configured to directly connect the outlet at the bottom of the clear liquid tank 13 to the inlet of the underground tank 17. The clarified liquid flows from the clear liquid tank 13 into the underground tank 17 by gravity. Valve B16 is installed in the path of pipe B; by adjusting its opening, the liquid flow rate can be controlled. For example, during the operation of the wet ball mill 5, the opening of valve B16 is adjusted to maintain a stable inlet flow. When the wet ball mill 5 is shut down for maintenance, valve B16 can be completely closed to cut off the liquid flow. The low-positioned outlet at the bottom of the clear liquid tank 13 allows the liquid to flow by gravity without additional power, while the inlet of the underground tank 17 is positioned lower than the outlet of the clear liquid tank 13, further ensuring smooth liquid flow.

[0042] The above is a detailed description of the preferred embodiments of the present utility model. However, the present utility model is not limited to the described embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present utility model. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A system for recovering coarse particles from calcined ore, characterized in that: The system includes a feeding hopper, a clinker elevator, a clinker silo, a chain scale, a wet ball mill, a slurry tank, a leaching tank, a filter press, and a clarification tank. The feeding hopper is connected to the feed end of the clinker elevator, the clinker silo is connected to the discharge end of the clinker elevator, the chain scale is installed between the clinker silo and the wet ball mill for conveying and metering granular calcined ore, the slurry tank is connected to the discharge port of the wet ball mill, the leaching tank is connected to the slurry tank via a pipeline, the discharge port of the leaching tank is connected to the feed port of the filter press, and the clarification tank is connected to the filtrate outlet of the filter press.

2. The calcined ore coarse particle recovery system according to claim 1, characterized in that: The leaching tank is located directly above the filter press. The outlet of the leaching tank is located at the bottom of the leaching tank. The outlet of the leaching tank is connected to the inlet of the filter press through pipe A, and a valve A is installed on pipe A.

3. The calcined ore coarse particle recovery system according to claim 2, characterized in that: A water pump A is installed between the slurry tank and the leaching tank. The water pump A is connected to an inlet pipe A and an outlet pipe A. The inlet of the inlet pipe A is placed inside the slurry tank, and the outlet of the outlet pipe A is placed inside the leaching tank.

4. The calcined ore coarse particle recovery system according to claim 3, characterized in that: The leaching tank is connected to a tank cover, and a stirring mechanism is provided at the bottom of the tank cover. The stirring blades of the stirring mechanism are located inside the leaching tank, and the stirring mechanism is used to stir the phosphate slurry in the leaching tank.

5. The calcined ore coarse particle recovery system according to claim 1, characterized in that: The slurry tank is located on the bottom surface and extends underground, while the wet ball mill is located on the ground surface, with the discharge port of the wet ball mill located directly above the slurry tank.

6. The calcined ore coarse particle recovery system according to claim 1, characterized in that: It also includes a clarification tank and an underground tank. The clarification tank is connected to the clarification tank, the clarification tank is connected to the underground tank, and the underground tank is connected to the water inlet of the wet ball mill.

7. A coarse particle recovery system for calcined ore according to claim 6, characterized in that: A water pump B is installed between the clarification tank and the clear liquid tank. The water pump B is connected to an inlet pipe B and an outlet pipe B. The inlet of the inlet pipe B is placed in the clarification tank, and the outlet of the outlet pipe B is placed in the clear liquid tank.

8. A coarse particle recovery system for calcined ore according to claim 7, characterized in that: It also includes a lifting mechanism, which is used to move the water inlet pipe B in the vertical direction to adjust the height of the water inlet pipe B in the clarification tank.

9. A coarse particle recovery system for calcined ore according to claim 6, characterized in that: A water pump C is installed between the underground tank and the wet ball mill. The water pump C is connected to an inlet pipe C and an outlet pipe C. The inlet of the inlet pipe C is placed inside the underground tank, and the outlet of the outlet pipe C is connected to the inlet of the wet ball mill.

10. A coarse particle recovery system for calcined ore according to claim 6, characterized in that: The outlet at the bottom of the clear liquid tank is connected to the inlet of the underground tank via pipe B, and a valve B is installed on pipe B.

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