Method and device for reducing tail water plume of deep-sea mining vehicle

Abstract

The invention discloses a method and device for reducing tail water plume of a deep-sea mining vehicle. The device comprises a crushing device, a liquid storage device, a centrifugal action device, an intelligent control device, a magnetic seed laying and recycling device and a super-magnetic separation device. The crushing device comprises a crusher, the liquid storage device comprises a liquid storage tank and a control valve, the liquid storage tank comprises a coagulant aid liquid storage tank and a coagulant liquid storage tank, the centrifugal action device comprises a centrifugal machine, a magnet, a liquid conveying pipe and a magnetic seed dispenser, and the centrifugal action device screens particles with different diameters in a water body to different layers through centrifugation. Under the action of the magnet, the magnetic field intensity in each layer is different, and the magnetic seeds with different particle sizes are combined with particle impurities in seawater under the action of a coagulant aid coagulant, so that a better flocculation effect is realized. Polyferric sulfate is adopted as a coagulant and can be used for treating heavy metal ions in water, polyacrylamide is adopted as a coagulant aid, suspended solids and colloidal particles in water can be effectively captured and adsorbed, and sedimentation and separation of the suspended solids and colloidal particles are promoted.

Description

Technical Field

[0001] The invention relates to the technical field of marine engineering deep-sea mining equipment, and in particular to a method and a device for reducing tail water plume of a deep-sea mining vehicle. Background Art

[0002] With the rapid development of industrialization, the demand for rare minerals in high-tech industries has increased dramatically, and land mineral resources can no longer meet the growing demand. Marine rare metal mineral resources are rich. In order to overcome the problem of future resource shortages, countries have begun to focus on the oceans that occupy most of the earth. my country's seabed polymetallic nodule mining area is the CC area in the Western Pacific, which has rich metal resource reserves, with about 420 million tons of metal nodules.

[0003] Polymetallic nodules are rich in manganese, nickel, copper, cobalt, molybdenum and various rare earth metals. The output in the ocean is estimated to be 3 trillion tons. They are rich in commercial value and are considered to be the most critical land mineral alternative resources. The total mineral reserves in the area allocated by my country in the Pacific CC zone alone can meet my country's mineral resource needs for nearly a hundred years. However, the operating environment in the deep sea is extremely harsh and complex. Most of them are found in a high-pressure, high-salt environment at a depth of 4,000 to 6,000 meters. Only a few commercial organizations and countries can realize the resource utilization of deep-sea minerals.

[0004] Polymetallic nodules are potato-shaped and widely distributed in the surface layer of deep-sea basin sediments at 4000-6000m below the seabed. The lifting mining system is considered to be the system with the most practical application potential. The system consists of a deep-sea mining vehicle, a riser and a mining support vessel. The deep-sea mining vehicle travels on the soft deep-sea bottom, relying on the walking device to maintain its passing performance, and collects manganese nodules on the seabed through the ore collection system. The nodule minerals collected by the deep-sea mining vehicle are transported to the relay station through the connecting hose for crushing and processing. The riser and lifting pump in the pipeline lifting system transport the collected polymetallic nodules to the mining ship.

[0005] Deep-sea polymetallic nodules are usually found in soft sediments on the seabed at a depth of 4,000 to 6,000 meters, and their surface particle sizes range widely, from 2 cm to 20 cm. During the collection process, if the size or particle size of polymetallic nodules exceeds 40 to 50 mm, it may have a serious impact on the transportation system. These larger nodules may not only increase the power consumption of the transportation system, but are more likely to block the transportation pipeline, causing the entire deep-sea mining operation to be forced to be interrupted. In addition, improper handling of the mud-water mixture containing polymetallic nodules collected will cause deep-sea mining vehicles to produce plume pollution to the environment when discharging tail water, causing a variety of adverse effects. Therefore, in deep-sea mining operations, how to reduce the plume is a difficult problem that must be tackled.

[0006] Based on the above practical problems, existing patents and technologies have designed corresponding deep-sea mining plume treatment technologies to a certain extent, but the following problems still exist:

[0007] The plume suppression device designed by patent CN218091160U is a common device for treating tailwater in deep-sea mining, which can guide the discharge of tailwater. However, the application has the following disadvantages: the mechanical structure is complex, which can easily cause mechanical failure due to large-size sediments getting stuck in the gear structure; the centrifugal force generated by the rotation of the plume suppression cover is used to discharge ore particles from the discharge trough. The discharge speed of ore particles is high, which can easily generate secondary plumes and the treatment effect is poor.

[0008] Patent CN115288692A designs a mineral mud and water separation and crushing device for seabed mining. It is mainly an integrated device containing a crushing component and a transmission component. During the transmission process, small particles of seabed sediments and water are collected into the mud and water collection area through the gaps of the grid rods to achieve the separation of minerals and mud and water. However, the application has the following shortcomings: the discharge of mud and water after separation is not fully considered. It only considers the impact of lowering the height of the mud and water discharge pipe on the seabed environment, and does not consider the phenomenon that small particles of seabed sediments and suspended matter are not easy to settle. Summary of the invention

[0009] Based on the above, the present invention overcomes the shortcomings of the prior art, realizes the particle size of metal nodules that can be transmitted to the transport ship through the hose, and realizes the separation of metal, mud and water. A device and method for reducing the tail water plume of a mining vehicle are proposed. The device can process data through an intelligent control device, control a liquid storage device and a centrifugal action device, and adjust the proportion of magnetic seed release for the metal nodule mixture collected by the mining vehicle, thereby effectively solving the plume pollution problem caused by the direct discharge of the tail water of the mining vehicle.

[0010] To achieve the above object, the technical solution adopted by the present invention is to provide a method for reducing the tail water plume of a deep-sea mining vehicle, comprising the following steps:

[0011] (1) When the deep-sea mining vehicle is operating in the deep-sea sediment, the water jet at the collection head at the front of the mining vehicle impacts the sediment and collects the sediment containing polymetallic nodules into the interior of the mining vehicle by hydraulic force;

[0012] (2) The collected metal nodules are processed by a crusher and have a diameter of 2 to 3 cm;

[0013] (3) Separation of metal nodules from small particles of mud and water through the filtration system;

[0014] (4) The muddy water containing tiny particles first reaches the centrifuge, which also includes magnetic strips and coagulation reaction medium. In the centrifuge, the centrifugal force and magnetic force accurately control the position of the magnetic seeds, so that particles of different sizes are coagulated with the appropriate magnetic seeds, achieving a better coagulation effect.

[0015] The specific method is as follows:

[0016] The particle size distribution of deep-sea surface sediments is 0-20cm, and the particle size of sticky particles is less than 32μm, accounting for more than 95%, of which 0-1μm accounts for 10%, 1-10μm accounts for 70%, 10-100μm accounts for 17%, and larger than 100μm accounts for 3%;

[0017] Therefore, for particles of 0-1μm, a 0.5μm magnetic seed is used for treatment; for particles of 1-10μm, a 5μm magnetic seed is used for treatment; for particles of 10-100μm, a 50μm magnetic seed is used for treatment; for particles larger than 100μm, a 150μm magnetic seed is used for treatment;

[0018] (5) The sludge is fully combined with the magnetic seeds in the centrifuge, and the mixed combination falls into the high-speed shearing equipment. Under the action of the high-speed shearing machine, the magnetic powder in the magnetic sludge is separated; the magnetic powder is recovered and transported to the storage tank, and the sludge is compressed and discharged to the seabed;

[0019] (6) After the mining truck passes through the mud water treatment system, there is less deep-sea sediment in the tail water, the plume pollution caused is smaller, and the seabed environment ecology can be restored in a shorter time.

[0020] Furthermore, the present application also provides a device for reducing the tailwater plume of a deep-sea mining vehicle, which is used in the above-mentioned method, and includes a crushing device, a filtering device, a magnetic seed placement and recovery device, a liquid storage device, a centrifugal device, an intelligent control device, and a supermagnetic separation device. The crushing device includes a crusher, the liquid storage device includes a liquid storage tank and a control valve, the liquid storage tank includes a coagulant storage tank and a coagulant storage tank, the centrifugal device includes a centrifuge, a magnet, a magnetic powder dispenser, and an infusion tube, the intelligent control device includes a central processor and a signal receiving device and a sending device, and the magnetic seed placement and recovery device includes a magnetic powder storage, a placement pipeline, a magnetic powder recoverer, and a recovery pipeline.

[0021] Furthermore, all the devices are located inside the mining vehicle, wherein the liquid storage tank contains two liquids, namely liquid A and liquid B. Liquid A is an inorganic polymer coagulant of polyferric sulfate, and liquid B is an organic polymer coagulant of polyacrylamide. The control valve has a built-in signal receiving device for controlling the liquid storage tank switch.

[0022] Furthermore, in the centrifugal device, particles of different diameters in seawater are centrifuged to different levels through centrifugal action, and magnetic seeds, coagulants and coagulants are injected into the centrifuge in sequence to achieve flocculation, wherein the distribution of magnetic seeds of different particle sizes in the centrifuge is determined by the magnetic field arrangement, and large particles are combined with magnetic seeds of large particle sizes to ensure sufficient binding force and stability; correspondingly, small particles are combined with magnetic seeds of small particle sizes.

[0023] Furthermore, the intelligent control device is located inside the mining vehicle, and has a built-in signal receiving device and a signal transmitting device, which can receive the electrical signal sent by the flow collection and monitoring device, and process the operation of the centrifuge through the central processing unit.

[0024] Furthermore, the magnetic seed placing and recovering device comprises a magnetic seed storage, a placing pipeline, a recovery pipeline and a magnetic seed recoverer, and the magnetic seeds of different particle sizes are stored in the magnetic seed storage.

[0025] Furthermore, the supermagnetic separation device comprises a magnetic field generator and a supermagnetic separator. The magnetic field generator is responsible for generating a strong magnetic field, and the supermagnetic separator contains supermagnetic materials for adsorbing and separating magnetic substances.

[0026] Furthermore, the crushing device, centrifugal device, intelligent control device, magnetic seed placement and recovery device and supermagnetic separation device are connected to the power supply of the mining vehicle through insulated wires and powered.

[0027] Furthermore, the liquid storage device, monitoring device, and intelligent control device are all placed inside the mining vehicle body, and the high-pressure and high-salt environment of the deep sea is isolated by the outer shell of the mining vehicle body to ensure the normal use of the devices inside the mining vehicle; the crushing device, centrifugal action device, supermagnetic separation device and magnetic seed placement and recovery pipeline of the mining vehicle that are in contact with seawater use high-strength aluminum alloy insulating shells to prevent seawater infiltration.

[0028] The beneficial effects of the present invention are:

[0029] 1. The present invention supplements the plume management of deep-sea mining vehicles and proposes a method and device for plume management of seabed mining vehicles based on different tail water particles. When the mining vehicle is operating and collecting, the operating process and working parameters of the treatment device are proposed for the collected water body. According to the mechanical properties of deep-sea sediments, the mixed particles in the collected water body are subjected to corresponding flocculation treatment, and finally the plume management of the mining vehicle is realized.

[0030] 2. The present invention fully considers the complex composition of particles produced by seabed mining and ore crushing: in the particle size distribution of deep-sea surface sediments (0-20cm), sticky particles (particle size <32μm) account for more than 95%, of which 0-1μm accounts for 10%, 1-10μm accounts for 70%, 10-100μm accounts for 17%, and particles larger than 100μm account for 3%.

[0031] Different treatment methods are adopted for particles of different sizes. For large particles, centrifugal separation method is used, and for small particles, magnetic powder corresponding to the particle size is used for flocculation treatment: for particles of 0-1μm, 0.5μm magnetic powder is used for treatment; for particles of 1-10μm, 5μm magnetic powder is used for treatment; for particles of 10-100μm, 50μm magnetic powder is used for treatment; for particles larger than 100μm, 150μm magnetic powder is used for treatment. The contact and mixing time of magnetic powder and particles is controlled by magnetic force to enhance the flocculation efficiency.

[0032] 3. At present, in the deep-sea mining process, the tailings are directly discharged to the nearby seabed through the return pipeline after the mineral processing. The present invention fully considers the complexity of the water body collected by the seabed mining vehicle, and separates the collected metal nodules, thin mud, and seawater mixture through an integrated processing device, and finally avoids the mixed water body from being directly discharged to the seabed, causing tailwater plume pollution.

[0033] 4. After the metal nodules are mined by deep-sea mining vehicles, they are often transported from the mining vehicles to the upper transport ships with particle size requirements. The existing devices are set up separately and are complicated to operate. This device integrates the three functions of "mud removal-crushing-mud and water separation" in one, which is closely linked, simple and efficient.

[0034] 5. The method and device for reducing tailwater plume described in the present invention adopts an intelligent control device to receive data transmitted by a monitoring device, and processes the received data through a central processing unit in the intelligent control device to determine the operating condition of the mining vehicle, and intelligently regulates the liquid storage device, the centrifugal action device and the supermagnetic separation device to complete plume control. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0036] Figure 1 This is a schematic diagram of the overall structure of the seabed mining vehicle of the present invention;

[0037] Figure 2 This is a layout diagram of the plume reduction device according to the present invention;

[0038] Figure 3 This is a diagram of a crushing device and a filtering device of the present invention;

[0039] Figure 4 It is a schematic diagram of the centrifugal action device of the present invention;

[0040] Figure 5 It is the front view of the centrifugal device of the present invention

[0041] Figure 6 It is a schematic diagram of the liquid storage device of the present invention;

[0042] Figure 7 Schematic diagram of the intelligent control device of the present invention.

[0043] Description of reference numerals:

[0044] 1. Crushing device; 2. Filtering device; 3. Liquid storage device; 4. Magnetic seed placement and recovery device; 5. Intelligent control device; 6. Centrifugal action device; 7. Quick shearing device; 8. Mud discharge pipe; 9. Drainage pipe; 001. Collection device; 002. Collection pipeline; 003. Mining vehicle body; 004. Crawler walking device; 101. Crusher; 301. Liquid storage tank; 302. Control valve; 401. Flow sensor; 501. Central processing unit; 502. Signal receiving device; 503. Signal transmitting device; 601. Magnetic device; 602. Magnetic seed injection pipe; 603. Coagulant and coagulant aid injection pipe. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the implementation examples of this application to clearly and completely describe the scheme in the embodiment of this application. Obviously, the described embodiment is only a part of the embodiment of this application, not all of the embodiments. Based on the embodiment of this application, other embodiments obtained by ordinary technicians in this field without making creative work are all within the scope of protection of this application.

[0046] The structures, sizes, proportions, etc. in the drawings of this specification are used to match the contents shown in this specification and are provided for the relevant persons familiar with the present technology to understand and read, rather than to stipulate various limiting conditions of the invention, so they have no practical significance. Any structural adjustment, size change, and proportional relationship change, as long as it does not affect the efficacy of the present invention, should be included in the scope of the present invention. At the same time, the various words used in this specification to define the position, such as "inside the vehicle" and "both ends", are for the convenience of description, rather than to fix their corresponding positions and implementation scopes, and to adjust their relative relationships. In the case of no changes to the substantive technology, they should be regarded as the scope of the present invention, and the selection of various concrete materials is not stipulated.

[0047] like Figures 1 to 7 The method and device for reducing the tailwater plume of a deep-sea mining vehicle are characterized by comprising the following steps:

[0048] (1) When the deep-sea mining vehicle is operating in the deep-sea sediment, the flow sensor 401 located inside the mining vehicle starts to work, senses the seawater flow collected by the mining vehicle in real time, and transmits the data to the intelligent control device 5.

[0049] (2) After receiving the transmitted real-time data, the intelligent control device 5 processes the data through the central processor 501, and determines how much magnetic seed, coagulant and coagulant to add to the centrifugal device according to the flow rate. When the monitoring data is abnormal, the intelligent control device 5 selects a suitable treatment plan according to the obtained real-time data and sends an electrical signal to the liquid storage device 3.

[0050] (3) After the liquid storage device 3 receives the electrical signal sent by the intelligent control device 5, the liquid storage tank 301 and the control valve 302 start to work. The control valve 302 opens the valve and injects different proportions of liquid A (polyferric sulfate inorganic polymer coagulant) and liquid B (polyacrylamide organic polymer coagulant aid) into the centrifuge through the pipeline.

[0051] (4) The magnetic seed placing and recovering device 4 puts the magnetic seeds into the centrifuge 601. Under the centrifugal action and magnetic field, the magnetic seeds of different particle sizes will be stabilized at various levels. According to the distribution position of particles of different particle sizes at different speeds of the centrifuge, the distribution of the magnetic seeds is controlled by magnetic force, so that after the coagulant and coagulant are released into the centrifuge 601, they are quickly and fully combined with the particulate impurities in the seawater to complete flocculation.

[0052] (5) The water after centrifugation is directly discharged from the top, and the adsorbent after the magnetic seeding falls into the fast shearing machine under the action of gravity. The magnetic sludge is quickly crushed by the high-speed shearing machine to separate the magnetic powder from the magnetic sludge. The sludge is compressed and discharged to the seabed through the sludge discharge pipe, and the magnetic powder is collected by the magnetic powder recovery device and recycled.

[0053] like Figure 1 As shown, the mining vehicle includes a collection device 001, a collection pipeline 002, a mining vehicle body 003, a crawler walking device 004 and a crusher 101. Figures 1 to 7 The method and device for reducing the tailwater plume of a deep-sea mining vehicle are characterized in that they include a crushing device 1, a filtering device 2, a liquid storage device 3, a magnetic seed placement and recovery device 4, an intelligent control device 5, a centrifugal device 6, a rapid shearing device 7, a mud discharge pipe 8, and a drainage pipe 9. The liquid storage device 3 includes a liquid storage tank 301 and a control valve 302. The magnetic seed placement and recovery device 4 includes a magnetic seed processor, a placement pipeline, and a recovery pipeline. The intelligent control device 5 includes a central processor 501 and a signal receiving device 502 and a transmitting device 503. The centrifugal device 6 includes a magnetic device 601, a magnetic seed injection pipe 602, and a coagulant and coagulant aid injection pipe 603. The rapid shearing device 7 includes a rapid shearing machine.

[0054] like Figures 1 to 7 In the method and device for reducing the tailwater plume of a deep-sea mining vehicle, the liquid storage device 3 is located inside the mining vehicle, and the liquid storage tank 301 contains two liquids, A and B. Liquid A is an inorganic polymer coagulant of polyferric sulfate, and liquid B is an organic polymer coagulant of polyacrylamide. The control valve has a built-in signal receiving device 502 for controlling the liquid storage tank switch.

[0055] like Figures 1 to 5 In the method and device for reducing the tail water plume of a deep-sea mining vehicle, the flow sensor 401 is located in the transport pipeline before entering the centrifugal device, and is used to monitor the flow of water that the mining vehicle will centrifuge.

[0056] like Figures 1 to 7 The method and device for reducing the tailwater plume of a deep-sea mining vehicle are described. The intelligent control device 5 is located inside the mining vehicle, and the central processor 501 has a built-in signal receiving device 502 and a signal transmitting device 503, which can receive the electrical signal sent by the flow sensor 401, and process the data through the central processor 501 to select the appropriate number of magnetic species and injection liquid volume.

[0057] like Figures 1 to 7 The method and device for reducing the tailwater plume of a deep-sea mining vehicle are described, wherein the crushing device 1, flow sensor 401, intelligent control device 5, centrifugal action device 6 and rapid shearing device 7 are connected to the mining vehicle power supply through insulated wires and powered by the mining vehicle power supply.

[0058] like Figures 1 to 7The method and device for reducing the tailwater plume of a deep-sea mining vehicle are all located inside the mining vehicle. The liquid storage device 3 and the intelligent control device 5 are placed in the part of the mining vehicle body that is isolated from high pressure and high salt, and are made of normal materials. The crushing device 1, the filtering device 2, the flow sensor 401, the laying pipeline, the recovery pipeline, the centrifugal device 6, the rapid shearing device 7, the mud discharge pipe 8, and the drainage pipe 9 are made of high-strength materials because they are in direct contact with high-pressure seawater to avoid damage caused by the high pressure of the deep sea.

Claims

1. A method for reducing tailwater plume of a deep-sea mining vehicle, characterized in that: The following steps are involved: (1) When the deep-sea mining vehicle is operating in the deep-sea sediment, the water jet at the collection head at the front of the mining vehicle impacts the sediment and collects the sediment containing polymetallic nodules into the interior of the mining vehicle by hydraulic force; (2) The collected metal nodules are processed by a crusher and have a diameter of 2 to 3 cm; (3) Separation of metal nodules from small particles of mud and water through the filtration system; (4) The muddy water containing tiny particles first reaches the centrifuge, which also includes magnetic strips and coagulation reaction medium. In the centrifuge, the centrifugal force and magnetic force accurately control the position of the magnetic seeds, so that particles of different sizes are coagulated with the appropriate magnetic seeds, achieving a better coagulation effect. The specific method is as follows: The particle size distribution of deep-sea surface sediments is 0-20cm, and the particle size of sticky particles is less than 32μm, accounting for more than 95%, of which 0-1μm accounts for 10%, 1-10μm accounts for 70%, 10-100μm accounts for 17%, and larger than 100μm accounts for 3%; Therefore, for particles of 0-1μm, a 0.5μm magnetic seed is used for treatment; for particles of 1-10μm, a 5μm magnetic seed is used for treatment; for particles of 10-100μm, a 50μm magnetic seed is used for treatment; for particles larger than 100μm, a 150μm magnetic seed is used for treatment; (5) The sludge is fully combined with the magnetic seeds in the centrifuge, and the mixed combination falls into the high-speed shearing equipment. Under the action of the high-speed shearing machine, the magnetic powder in the magnetic sludge is separated; the magnetic powder is recovered and transported to the storage tank, and the sludge is compressed and discharged to the seabed; (6) After the mining truck passes through the mud water treatment system, there is less deep-sea sediment in the tail water, the plume pollution caused is smaller, and the seabed environment ecology can be restored in a shorter time.

2. A device for reducing the tailwater plume of a deep-sea mining vehicle, used in the method of claim 1, characterized in that: It includes a crushing device, a filtering device, a magnetic seed placing and recovering device, a liquid storage device, a centrifugal action device, an intelligent control device, and a supermagnetic separation device. The crushing device includes a crusher, the liquid storage device includes a liquid storage tank and a control valve, the liquid storage tank includes a coagulant liquid storage tank and a coagulant liquid storage tank, the centrifugal action device includes a centrifuge, a magnet, a magnetic powder dispenser, and an infusion tube, the intelligent control device includes a central processing unit and a signal receiving device and a sending device, and the magnetic seed placement and recovery device includes a magnetic powder storage device, a placement pipeline, a magnetic powder recoverer, and a recovery pipeline.

3. A device for reducing tailwater plume of a deep-sea mining vehicle as claimed in claim 2, characterized in that: All the devices are located inside the mining vehicle, and the liquid storage tank contains two liquids, namely liquid A and liquid B. Liquid A is an inorganic polymer coagulant of polyferric sulfate, and liquid B is an organic polymer coagulant of polyacrylamide. The control valve has a built-in signal receiving device for controlling the liquid storage tank switch.

4. A device for reducing tailwater plume of a deep-sea mining vehicle as claimed in claim 2, characterized in that: In the centrifugal device, particles of different diameters in seawater are centrifuged to different levels through centrifugal action, and magnetic seeds, coagulants and coagulants are injected into the centrifuge in sequence to achieve flocculation, wherein the distribution of magnetic seeds of different particle sizes in the centrifuge is determined by the arrangement of the magnetic field, and large particles are combined with magnetic seeds of large particle sizes to ensure sufficient binding force and stability; correspondingly, small particles are combined with magnetic seeds of small particle sizes.

5. A device for reducing tailwater plume of a deep-sea mining vehicle as claimed in claim 2, characterized in that: The intelligent control device is located inside the mining vehicle and has a built-in signal receiving device and a signal transmitting device. It can receive the electrical signal sent by the flow collection and monitoring device and process the operation of the centrifuge through the central processing unit.

6. A device for reducing tailwater plume of a deep-sea mining vehicle as claimed in claim 2, characterized in that: The magnetic seed placing and recovering device comprises a magnetic seed storage, a placing pipeline, a recovering pipeline and a magnetic seed recovering device, wherein magnetic seeds of different particle sizes are stored in the magnetic seed storage.

7. A device for reducing tailwater plume of a deep-sea mining vehicle as claimed in claim 2, characterized in that: The supermagnetic separation device comprises a magnetic field generator and a supermagnetic separator. The magnetic field generator is responsible for generating a strong magnetic field, and the supermagnetic separator contains supermagnetic materials for adsorbing and separating magnetic substances.

8. A device for reducing tailwater plume of a deep-sea mining vehicle as claimed in claim 2, characterized in that: The crushing device, centrifugal device, intelligent control device, magnetic seed placing and recovery device and super magnetic separation device are connected to the power supply of the mining vehicle through insulated wires and powered.

9. A device for reducing tailwater plume of a deep-sea mining vehicle as claimed in claim 2, characterized in that: The liquid storage device, monitoring device, and intelligent control device are all placed inside the mining vehicle body. The mining vehicle body shell isolates the high-pressure and high-salt environment of the deep sea to ensure the normal use of the devices inside the mining vehicle; the crushing device, centrifugal action device, supermagnetic separation device, and magnetic seed placement and recovery pipeline of the mining vehicle that are in contact with seawater use high-strength aluminum alloy insulating shells to prevent seawater infiltration.

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