Equipment for improving direct recovery rate of wet iron removal

Abstract

The utility model provides equipment for improving the direct recovery rate of wet iron removal, and belongs to the technical field of positive electrode battery material preparation. The equipment for improving the direct recovery rate of wet iron removal comprises a frame body, and a feeding and storing unit, an iron removal unit and a centrifugal drying unit which are arranged on the frame body, the feeding and storing unit is used for conveying to-be-treated materials to the iron removal unit; the iron removal unit is used for removing magnetic foreign matters in the materials; and the centrifugal drying unit is used for carrying out solid-liquid separation on the material treated by the iron removal unit and drying the obtained solid material. According to the equipment for improving the direct recovery rate of wet iron removal, magnetic foreign matters and a positive electrode material are separated through stirring, mixing, washing and spin-drying of the salt-free water, so that the loss rate of the material is reduced, and the direct recovery rate of iron removal is improved.

Description

Technical Field

[0001] This disclosure relates to the field of cathode battery material preparation technology, and in particular to an equipment for improving the direct recovery rate of wet iron removal. Background Technology

[0002] The main components of a lithium-ion battery include electrolyte, separator, and positive and negative electrode materials, with the positive electrode material accounting for a large proportion. Therefore, the performance of the positive electrode material directly affects the performance of the lithium-ion battery. A key process in the production of lithium battery positive electrode materials is iron removal.

[0003] In existing technologies, iron removal from cathode materials is mainly achieved through dry methods, which involve using an iron core to adsorb magnetic foreign matter from the cathode material, thereby improving the purity of the cathode material. However, the iron core adsorbs magnetic foreign matter, but it also adsorbs some cathode material, resulting in a loss of some cathode material. When processing a large batch of cathode materials, the loss of cathode material can reach a considerable weight, leading to a high loss rate and reducing the direct recovery rate of iron removal. Utility Model Content

[0004] The purpose of this disclosure is to overcome the shortcomings of the prior art and provide equipment for improving the direct recovery rate of wet iron removal, thereby reducing material loss and increasing the direct recovery rate of iron removal.

[0005] To achieve the aforementioned objectives of this utility model, the present disclosure adopts the following technical solution:

[0006] An equipment for improving the direct recovery rate of wet iron removal includes a frame and a feeding and storage unit, an iron removal unit, and a centrifugal drying unit installed on the frame.

[0007] The feeding and storage unit is used to feed the material to be processed into the iron removal unit;

[0008] The iron removal unit is used to remove magnetic foreign matter from the material.

[0009] The centrifugal drying unit is used to perform solid-liquid separation on the material processed by the iron removal unit and to dry the obtained solid material.

[0010] In one exemplary embodiment of this disclosure,

[0011] The feeding and storage unit includes a feeding bin, a conveying tank, and a storage bin;

[0012] The discharge port of the feeding hopper is connected to the inlet of the conveying tank, and a first discharge valve and a first rotary valve are sequentially arranged between the feeding hopper and the conveying tank.

[0013] The discharge port of the conveying tank and the inlet of the storage silo are connected by a first conveying pipe, and a first butterfly valve is provided on the first conveying pipe.

[0014] In one exemplary embodiment of this disclosure, a plurality of feeding air hammers are evenly distributed on the circumferential outer wall of the feeding bin near the discharge port;

[0015] Multiple storage air hammers are evenly distributed on the circumferential outer wall of the storage bin near the discharge port.

[0016] In one exemplary embodiment of this disclosure, the feeding hopper, conveying tank, and storage hopper are each equipped with a weighing module.

[0017] In one exemplary embodiment of this disclosure, the iron removal unit includes a reaction vessel and an iron removal machine;

[0018] The first feed inlet of the reactor is connected to the discharge outlet of the storage silo via a second rotary valve, and the second feed inlet of the reactor is connected to the outlet of the brine flushing pipe.

[0019] The discharge port of the reactor and the inlet of the iron removal machine are connected by a second conveying pipe. The discharge port of the reactor is equipped with a discharge valve, the inlet of the iron removal machine is equipped with a feed valve, and a diaphragm pump is installed on the second conveying pipe.

[0020] The second feed pipe is connected to the brine flushing pipe via a flushing valve, which is located between the discharge valve and the diaphragm pump.

[0021] The discharge port of the iron removal machine is connected to the third inlet of the reactor. The discharge port of the iron removal machine is equipped with a second discharge valve, and a first return valve is provided between the discharge port of the iron removal machine and the third inlet of the reactor.

[0022] In one exemplary embodiment of this disclosure, a stirring rod is provided inside the reaction vessel, and a drive motor for driving the stirring rod to rotate is provided on the reaction vessel.

[0023] In one exemplary embodiment of this disclosure, the first feed port is located between the second feed port and the third feed port.

[0024] In one exemplary embodiment of this disclosure, the centrifugal drying unit includes a centrifuge and a double cone dryer;

[0025] The inlet of the centrifuge is connected to the outlet of the iron remover, and a slurry inlet valve is provided between the inlet of the centrifuge and the outlet of the iron remover.

[0026] The solid material outlet of the centrifuge is connected to the feed inlet of the double cone dryer via a discharge valve.

[0027] In one exemplary embodiment of this disclosure, the liquid outlet of the centrifuge is connected to a third feed pipe, one end of the mother liquor return pipe is connected to the third feed pipe, the other end of the mother liquor return pipe is connected to the third feed inlet of the reactor, and a second return valve is provided on the mother liquor return pipe.

[0028] In one exemplary embodiment of this disclosure, a second butterfly valve is provided at the end of the third feed pipe away from the centrifuge and the mother liquor return pipe.

[0029] The beneficial effects of this disclosure are:

[0030] (1) This utility model enables the positive electrode material to be circulated between the reactor and the iron removal machine through the cooperation of the reactor, the iron removal machine and the supporting pipes and valves, thereby achieving the first improvement in material recovery rate.

[0031] (2) This utility model uses a centrifuge to remove water from the slurry after iron removal and to return the water mixed with some filter material to the reactor, thereby achieving a second improvement in material recovery rate.

[0032] (3) This utility model separates magnetic foreign matter and positive electrode material by stirring, mixing, rinsing and drying with salt water, thereby reducing the loss rate of materials and improving the direct recovery rate of iron removal. Attached Figure Description

[0033] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure. It is obvious that the drawings described below are merely some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0034] Figure 1 This is a schematic diagram of the structure of equipment for improving the direct recovery rate of wet iron removal in one embodiment of the present disclosure;

[0035] Figure 2 This is a schematic diagram of the feeding hopper in one embodiment of the present disclosure;

[0036] Figure 3 This is a schematic diagram of the structure of the storage silo in one embodiment of the present disclosure;

[0037] Figure 4 This is a schematic diagram of the structure of a reaction vessel in one embodiment of the present disclosure.

[0038] Explanation of reference numerals in the attached figures:

[0039] 1. Frame; 2. Feeding and storage unit; 201. Feeding bin; 202. Conveying tank; 203. Storage bin; 204. First discharge valve; 205. First rotary valve; 206. First conveying pipe; 207. First butterfly valve; 208. Feeding air hammer; 209. Storage air hammer; 3. Iron removal unit; 301. Reactor; 302. Iron removal machine; 303. Second rotary valve; 304. Anion-water flushing pipe; 305. Second conveying pipe; 3 06. Discharge valve; 307. Feed valve; 308. Diaphragm pump; 309. Flushing valve; 310. Second discharge valve; 311. First return valve; 312. Stirring rod; 313. Drive motor; 4. Centrifugal drying unit; 401. Centrifuge; 402. Double cone dryer; 403. Feed valve; 404. Discharge valve; 405. Third conveying pipe; 406. Mother liquor return pipe; 407. Second return valve; 408. Second butterfly valve. Detailed Implementation

[0040] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore detailed descriptions of them will be omitted. Furthermore, the drawings are merely illustrative of this disclosure and are not necessarily drawn to scale.

[0041] Although relative terms such as "up" and "down" are used in this specification to describe the relative relationship of one component of an icon to another, these terms are used only for convenience, such as according to the orientation of the examples shown in the accompanying drawings. It is understood that if the device of the icon is flipped upside down, the component described as "up" will become the component described as "down." When a structure is "up" of another structure, it may mean that the structure is integrally formed on the other structure, or that the structure is "directly" mounted on the other structure, or that the structure is "indirectly" mounted on the other structure through another structure.

[0042] The terms “a,” “one,” “the,” “the,” and “at least one” are used to indicate the presence of one or more elements / components / etc.; the terms “including” and “having” are used to indicate an open-ended inclusion and to mean that there may be other elements / components / etc. in addition to the listed elements / components / etc.; the terms “first,” “second,” and “third,” etc., are used only as markers and are not a limitation on the number of objects.

[0043] This disclosure provides an equipment for improving the direct recovery rate of wet iron removal, see [link to relevant documentation]. Figure 1The system includes a frame 1 and a feeding and storage unit 2, an iron removal unit 3, and a centrifugal drying unit 4 installed on the frame 1. The feeding and storage unit 2 is used to feed the material to be processed to the iron removal unit 3. The iron removal unit 3 is used to remove magnetic foreign objects from the material. The centrifugal drying unit 4 is used to perform solid-liquid separation on the material processed by the iron removal unit 3 and to dry the obtained solid material.

[0044] In this embodiment, the equipment consists of a frame 1 and a feeding and storage unit 2, an iron removal unit 3, and a centrifugal drying unit 4 installed on the frame 1. The cathode material to be processed is first stored in the feeding and storage unit 2, and then quantitatively transported to the iron removal unit 3 through the feeding and storage unit 2. The iron removal unit 3 removes iron from the cathode material by thoroughly mixing it with the deionized water. The centrifugal drying unit 4 intercepts the iron-removed material, removes the moisture, and dries it to obtain pure cathode material.

[0045] Compared to existing dry iron removal equipment, this equipment for improving the direct recovery rate of wet iron removal separates magnetic foreign objects and positive electrode materials through stirring, mixing, rinsing and drying with salt water, reducing material loss rate and improving the direct recovery rate of iron removal.

[0046] In one embodiment of this disclosure, see [link to relevant documentation]. Figures 1 to 3 The feeding and storage unit 2 includes a feeding bin 201, a conveying tank 202, and a storage bin 203. The discharge port of the feeding bin 201 is connected to the inlet of the conveying tank 202. A first discharge valve 204 and a first rotary valve 205 are sequentially arranged between the feeding bin 201 and the conveying tank 202. The discharge port of the conveying tank 202 and the inlet of the storage bin 203 are connected by a first conveying pipe 206, and a first butterfly valve 207 is arranged on the first conveying pipe 206. In this way, the cathode material to be processed can be gradually conveyed to the iron removal unit 3, realizing batch iron removal of the cathode material to be processed and improving the iron removal efficiency of the cathode material.

[0047] Optionally, the feeding bin 201 is installed at the top of one side of the frame 1, and the conveying tank 202 is installed below the feeding bin 201. The discharge port of the feeding bin 201 and the inlet of the conveying tank 202 are connected by a pipe. A first discharge valve 204 and a first rotary valve 205 are installed on the pipe. The feeding bin 201 is controlled to convey materials to the conveying tank 202 by the first discharge valve 204 and the first rotary valve 205. The first discharge valve 204 is located above the first rotary valve 205. The storage bin 203 is installed on one side of the feeding bin 201. The discharge port of the conveying tank 202 and the inlet of the storage bin 203 are connected by a first conveying pipe 206. A first butterfly valve 207 is installed on the first conveying pipe 206. The conveying tank 202 is controlled to convey materials to the storage bin 203 by the first butterfly valve 207.

[0048] In one embodiment of this disclosure, see [link to relevant documentation]. Figure 2 Multiple feeding hammers 208 are evenly distributed on the circumferential outer wall of the feeding bin 201 near the discharge port. This can prevent the positive electrode material from clogging in the feeding bin 201 and facilitate the positive electrode material in the feeding bin 201 to enter the conveying tank 202.

[0049] Optionally, see Figure 3 Multiple storage air hammers 209 are evenly distributed on the circumferential outer wall of the storage bin 203 near the discharge port. This can prevent the positive electrode material from clogging in the storage bin 2031 and facilitate the entry of the positive electrode material in the storage bin 2031 into the iron removal unit 3.

[0050] In one embodiment of this disclosure, a weighing module is respectively installed on the feeding hopper 201, the conveying tank 202, and the storage hopper 203. Thus, the weighing modules weigh the positive electrode material in the feeding hopper 201, the conveying tank 202, and the storage hopper 203 to determine whether the material should be conveyed to the next process, facilitating material transfer between the feeding hopper 201, the conveying tank 202, and the storage hopper 203.

[0051] Understandably, the feeding hopper 201, conveying tank 202, and storage hopper 203 are all equipped with weighing modules. After the cathode material to be processed is fed into the feeding hopper 201, the conveying tank 202 determines whether the material needs to be conveyed to the storage hopper 203 of the next process based on the upper and lower weight limits set in the process. At the same time, the storage hopper 203 decides whether to accept / unload the material based on the upper and lower weight limits set in the storage hopper. Thus, the material transfer between the feeding hopper 201, conveying tank 202, and storage hopper 203 is determined by the three weighing modules.

[0052] In one embodiment of this disclosure, see [link to relevant documentation]. Figure 1 and Figure 4The iron removal unit 3 includes a reactor 301 and an iron removal machine 302. The first inlet of the reactor 301 is connected to the outlet of the storage silo 203 via a second rotary valve 303, and the second inlet of the reactor 301 is connected to the outlet of the deionized water flushing pipe 304. The outlet of the reactor 301 is connected to the inlet of the iron removal machine 302 via a second conveying pipe 305. The outlet of the reactor 301 is equipped with a discharge valve 306, and the inlet of the iron removal machine 302 is equipped with a feed valve. 307. A diaphragm pump 308 is installed on the second feed pipe 305. The second feed pipe 305 is connected to the brine flushing pipe 304 via a flushing valve 309, which is located between the discharge valve 306 and the diaphragm pump 308. The discharge port of the iron remover 302 is connected to the third inlet of the reactor 301. A second discharge valve 310 is installed at the discharge port of the iron remover 302, and a first return valve 311 is installed between the discharge port of the iron remover 302 and the third inlet of the reactor 301. In this way, iron removal of the cathode material is achieved through mixed flushing with brine. Through the cooperation of the reactor 301, the iron remover 302, the second feed pipe 305, the discharge valve 306, the feed valve 307, the diaphragm pump 308, the flushing valve 309, the second discharge valve 310, and the first return valve 311, the cyclic iron removal of the cathode material is achieved, thus improving the material recovery rate for the first time.

[0053] Optionally, the reactor 301 is installed below the storage silo 203, and the iron remover 302 is installed on one side of the reactor 301. The first inlet of the reactor 301 and the outlet of the storage silo 203 are connected by a pipe, and a second rotary valve 303 is installed on the pipe. An external deionized water flushing pipe 304 is connected to the second inlet of the reactor 301, and a valve is installed on the deionized water flushing pipe 304. The outlet of the reactor 301 and the inlet of the iron remover 302 are connected by a second conveying pipe 305. A valve is installed at the outlet of the reactor 301. The discharge valve 306 and the feed inlet of the iron remover 302 are equipped with a feed valve 307. A diaphragm pump 308 is installed on the second feed pipe 305 between the discharge valve 306 and the feed valve 307. The second feed pipe 305 is connected to the brine flushing pipe 304 through a pipeline. A flushing valve 309 is installed on the pipeline. The interface between the pipeline and the second feed pipe 305 is located between the discharge valve 306 and the diaphragm pump 308. The discharge outlet of the iron remover 302 is connected to the third feed inlet of the reactor 301 through a pipeline. A first return slurry valve 311 is installed on the pipeline.

[0054] In one embodiment of this disclosure, see [link to relevant documentation]. Figure 4 A stirring rod 312 is installed inside the reactor 301, and a drive motor 313 is installed on the reactor 301 to drive the stirring rod 312 to rotate. In this way, the brine and materials inside the reactor 301 can be fully mixed, thereby improving the iron removal effect of the positive electrode material.

[0055] Understandably, before the cathode material enters the reactor 301, an appropriate amount of deionized water is flushed into the reactor 301 through the deionized water flushing pipe 304. After the water level reaches the limit, the storage silo 203 discharges the cathode material into the reactor 301. The drive motor 313 is started, and the stirring rod 312 rotates to fully mix the deionized water and the material in the reactor 301 to form a slurry. The stirring time can be set in advance. Then, the discharge valve 306, the feed valve 307, the second discharge valve 310, and the first return slurry valve 311 are opened, and the diaphragm pump 308 and the iron remover 302 are started, allowing the slurry to flow out of the reactor 301. Afterwards, the material flows sequentially through the discharge valve 306, the second conveying pipe 305, the diaphragm pump 308, the feed valve 307, the iron remover 302, the second discharge valve 310, and the first return slurry valve 311 before flowing back into the reactor 301, thus achieving iron removal through circulation between the reactor 301 and the iron remover 302. After the set iron removal time is reached, the iron remover 302 continues to work. At this time, the flushing valve 309 opens, and the brine flushing pipe 304 is connected to the second conveying pipe 305. The brine flushes the material in the pipe and the iron remover 302 back into the reactor 301 according to the set flushing time, thus achieving the first improvement in material recovery rate.

[0056] In one embodiment of this disclosure, see [link to relevant documentation]. Figure 1 and Figure 4 The first feed inlet is located between the second and third feed inlets. This allows for the convenient and orderly addition of various materials into the reactor 301, avoiding confusion in the iron removal process.

[0057] In one embodiment of this disclosure, see [link to relevant documentation]. Figure 1 The centrifugal drying unit 4 includes a centrifuge 401 and a double-cone dryer 402. The inlet of the centrifuge 401 is connected to the outlet of the iron remover 302, and a slurry inlet valve 403 is provided between the inlet of the centrifuge 401 and the outlet of the iron remover 302. The solid material outlet of the centrifuge 401 is connected to the inlet of the double-cone dryer 402 through a discharge valve 404. In this way, the water in the slurry after iron removal can be removed by centrifugation, and the obtained material can be dried to complete the iron removal of the cathode material.

[0058] In one embodiment of this disclosure, see [link to relevant documentation]. Figure 1 The liquid outlet of centrifuge 401 is connected to a third feed pipe 405. One end of the mother liquor return pipe 406 is connected to the third feed pipe 405, and the other end of the mother liquor return pipe 406 is connected to the third feed inlet of reactor 301. A second return valve 407 is installed on the mother liquor return pipe 406. In this way, the water mixed with some filter material that is discarded by centrifuge 401 can be transported back to reactor 301, thereby achieving a second improvement in material recovery rate.

[0059] In one embodiment of this disclosure, see [link to relevant documentation]. Figure 1A second butterfly valve 408 is installed at the end of the third feed pipe 405 that is away from the centrifuge 401 and the mother liquor return pipe 406. In this way, the water that has undergone secondary treatment can be discharged from the centrifuge 401.

[0060] Optionally, centrifuge 401 is installed on one side of storage silo 203, and double cone dryer 402 is installed below centrifuge 401. The inlet of centrifuge 401 is connected to the outlet of iron remover 302 via a pipe. This pipe can be connected to the pipe connecting the outlet of iron remover 302 to the third inlet of reactor 301. The connection point between the two is located between the second discharge valve 310 and the first return valve 311. A slurry inlet valve 403 is installed on this pipe. The solid material outlet of centrifuge 401 is connected to the double cone dryer. The feed inlets of centrifuge 402 are connected by a pipe, and a discharge valve 404 is installed on the pipe. The liquid discharge outlet of centrifuge 401 is connected to a third feed pipe 405. A second butterfly valve 408 is installed on the third feed pipe 405. The third feed pipe 405 is connected to the third feed inlet of reactor 301 by a mother liquor return pipe 406. A second return valve 407 is installed on the mother liquor return pipe 406. The connection point between the mother liquor return pipe 406 and the third feed pipe 405 is located between the second butterfly valve 408 and centrifuge 401.

[0061] Understandably, after the iron removal machine 302 completes the iron removal, the diaphragm pump 308 transports the iron-removed slurry in the reactor 301 to the centrifuge 401. The centrifuge 401 removes the water from the slurry, which contains some filtered material. At this time, the second butterfly valve 408 is closed and the second return slurry valve 407 is opened, allowing the water containing the material to return to the reactor 301 along the mother liquor return slurry pipe 406, thus achieving a second improvement in material recovery rate. After the centrifuge 401 reaches the set drying time, the dried material enters the double cone dryer 402 through the discharge valve 404, and the iron removal process ends after drying.

[0062] In one embodiment of this disclosure, see Figures 1 to 4 The working process of this equipment for improving the direct recovery rate of wet iron removal is briefly described as follows:

[0063] In use, the cathode material to be processed is first placed into the feeding hopper 201. The bottom conveyor tank 202, based on the upper and lower weight limits set by the process, uses a weighing module to determine whether the material needs to be transferred to the next process storage hopper 203. Then, the storage hopper 203, based on its set upper and lower weight limits, uses its weighing module to determine whether it needs to accept / discharge the material. After the cathode material to be processed enters the storage hopper 203, an appropriate amount of anhydrous water is flushed into the reactor 301 through the anhydrous water flushing pipe 304. Once the water level reaches the limit, the storage hopper 203 discharges the material. The positive electrode material enters the reactor 301. The drive motor 313 is started, and the stirring rod 312 rotates to fully mix the anionless water and materials in the reactor 301, forming a slurry. The stirring time of the stirring rod 312 can be preset. The discharge valve 306, feed valve 307, second discharge valve 310, and first return slurry valve 311 are opened. The diaphragm pump 308 and the iron remover 302 are started. After the slurry flows out of the reactor 301, it flows sequentially through the discharge valve 306, the second feed pipe 305, the diaphragm pump 308, the feed valve 307, the iron remover 302, the second discharge valve 310, and the first return slurry valve 311. After passing through valve 311, the slurry flows back into reactor 301, achieving slurry circulation and iron removal between reactor 301 and iron remover 302. After the set iron removal time, iron remover 302 continues to operate. At this time, flushing valve 309 opens, and the demineralized water flushing pipe 304 connects to the second conveying pipe 305. The demineralized water flushes the material in the pipes and iron remover 302 back into reactor 301 according to the set flushing time, achieving the first improvement in material recovery rate. Diaphragm pump 308 transports the iron-removed slurry in reactor 301 to centrifuge 401. At this time, the drum and rotor of centrifuge 401 are both... The set rotation speed needs to be reached. The drum rotates at high speed to evenly throw the slurry onto the drum lined with filter cloth. The drum intercepts the material on the inner wall and throws off the water through centrifugal force. The water contains some of the material that has been filtered. At this time, the second butterfly valve 408 is closed and the second return slurry valve 407 is opened, so that the water containing the material returns to the reactor 301 along the mother liquor return slurry pipe 406, thereby achieving a second improvement in material recovery rate. After the centrifuge 401 reaches the set drying time, the dried material enters the double cone dryer 402 through the discharge valve 404. The double cone dryer 402 dries the material. After drying, the iron removal process ends.

[0064] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the utility models disclosed herein. This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the appended claims.

Claims

1. Equipment for improving the direct recovery rate of wet iron removal, characterized in that, It includes a frame (1) and a feeding and storage unit (2), an iron removal unit (3), and a centrifugal drying unit (4) installed on the frame (1); The feeding and storage unit (2) is used to feed the material to be processed into the iron removal unit (3); The iron removal unit (3) is used to remove magnetic foreign matter from the material; The centrifugal drying unit (4) is used to perform solid-liquid separation on the material processed by the iron removal unit (3) and to dry the obtained solid material.

2. The equipment for improving the direct recovery rate of wet iron removal according to claim 1, characterized in that, The feeding and storage unit (2) includes a feeding bin (201), a conveying tank (202), and a storage bin (203); The discharge port of the feeding bin (201) is connected to the inlet of the conveying tank (202), and a first discharge valve (204) and a first rotary valve (205) are sequentially arranged between the feeding bin (201) and the conveying tank (202); The discharge port of the conveying tank (202) and the inlet of the storage bin (203) are connected by a first conveying pipe (206), and a first butterfly valve (207) is provided on the first conveying pipe (206).

3. The equipment for improving the direct recovery rate of wet iron removal according to claim 2, characterized in that, The feeding bin (201) has multiple feeding air hammers (208) evenly distributed on the circumferential outer wall near the discharge port; The storage bin (203) has multiple storage air hammers (209) evenly distributed on the circumferential outer wall near the discharge port.

4. The equipment for improving the direct recovery rate of wet iron removal according to claim 2, characterized in that, Weighing modules are respectively installed on the feeding bin (201), the conveying tank (202), and the storage bin (203).

5. The equipment for improving the direct recovery rate of wet iron removal according to claim 2, characterized in that, The iron removal unit (3) includes a reaction vessel (301) and an iron removal machine (302); The first inlet of the reactor (301) is connected to the outlet of the storage bin (203) via a second rotary valve (303), and the second inlet of the reactor (301) is connected to the outlet of the salt water flushing pipe (304). The discharge port of the reactor (301) and the inlet of the iron remover (302) are connected by a second conveying pipe (305). The discharge port of the reactor (301) is equipped with a discharge valve (306), the inlet of the iron remover (302) is equipped with a feed valve (307), and a diaphragm pump (308) is installed on the second conveying pipe (305). The second feed pipe (305) is connected to the brine flushing pipe (304) through a flushing valve (309), which is located between the discharge valve (306) and the diaphragm pump (308). The discharge port of the iron removal machine (302) is connected to the third inlet of the reactor (301). The discharge port of the iron removal machine (302) is provided with a second discharge valve (310). A first return valve (311) is provided between the discharge port of the iron removal machine (302) and the third inlet of the reactor (301).

6. The equipment for improving the direct recovery rate of wet iron removal according to claim 5, characterized in that, A stirring rod (312) is provided inside the reaction vessel (301), and a drive motor (313) for driving the stirring rod (312) to rotate is provided on the reaction vessel (301).

7. The equipment for improving the direct recovery rate of wet iron removal according to claim 5, characterized in that, The first feed inlet is located between the second feed inlet and the third feed inlet.

8. The equipment for improving the direct recovery rate of wet iron removal according to claim 5, characterized in that, The centrifugal drying unit (4) includes a centrifuge (401) and a double cone dryer (402); The inlet of the centrifuge (401) is connected to the outlet of the iron remover (302), and a slurry inlet valve (403) is provided between the inlet of the centrifuge (401) and the outlet of the iron remover (302). The solid material outlet of the centrifuge (401) is connected to the feed inlet of the double cone dryer (402) via a discharge valve (404).

9. The equipment for improving the direct recovery rate of wet iron removal according to claim 8, characterized in that, The centrifuge (401) has a liquid outlet connected to a third feed pipe (405), one end of the mother liquor return pipe (406) is connected to the third feed pipe (405), and the other end of the mother liquor return pipe (406) is connected to the third feed inlet of the reactor (301). A second return valve (407) is provided on the mother liquor return pipe (406).

10. The equipment for improving the direct recovery rate of wet iron removal according to claim 9, characterized in that, A second butterfly valve (408) is provided at the end of the third feed pipe (405) away from the centrifuge (401) and the mother liquor return pipe (406).

Images