A method and apparatus for reducing the wake plume of a deep sea mining vehicle

Abstract

The application discloses a method and device for reducing the tail water plume of a deep-sea mining vehicle, and the device comprises a crushing device, a liquid storage device, a centrifugal device, an intelligent control device, a magnetic seed distribution and recovery device and an ultra-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 storage tank and a coagulant storage tank, the centrifugal device comprises a centrifuge, a magnet, a liquid conveying pipe and a magnetic seed distributor, the centrifugal device separates particles of different diameters in the water body into different layers through centrifugation, the magnetic field in each layer is different in strength under the action of the magnet, and different particle sizes of magnetic seeds are combined with particle impurities in seawater under the action of coagulant and coagulant, so that a better flocculation effect is achieved. The polymeric ferric sulfate used as the coagulant can be used for treating heavy metal ions in water, and the polyacrylamide used as the coagulant can effectively capture and adsorb suspended matters and colloidal particles in water, so that the settlement and separation of the suspended matters and the colloidal particles are promoted.

Description

Technical Field

[0001] The present invention relates to the technical field of marine engineering deep-sea mining equipment, and in particular to a method and device for reducing tailwater 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 terrestrial mineral resources are no longer able to meet this growing demand. Marine rare metal minerals are abundant. To overcome future resource shortages, countries are focusing on the oceans, which cover the vast majority of Earth's surface. my country's submarine polymetallic nodule mining area is located in the CC area of ​​the Western Pacific Ocean, which boasts rich metal reserves, with approximately 420 million tons of nodules.

[0003] Polymetallic nodules are rich in manganese, nickel, copper, cobalt, molybdenum, and various rare earth metals. Their ocean production is estimated at 3 trillion tons, and they hold enormous commercial value. They are considered a key alternative to terrestrial minerals. The total mineral reserves in my country's Pacific CC zone alone could meet my country's mineral resource needs for nearly a century. However, the deep-sea operating environment is extremely harsh and complex, with most occurring at depths of 4,000 to 6,000 meters in a high-pressure, high-salinity environment. Consequently, only a few commercial organizations and countries are able to fully utilize deep-sea minerals.

[0004] Polymetallic nodules are potato-shaped and widely distributed in the surface sediments of deep-sea basins at depths of 4,000-6,000 meters. A lifting mining system is considered to have the greatest practical application potential. This system consists of a deep-sea mining vehicle, a riser, and a mining support vessel. The deep-sea mining vehicle navigates the soft deep seabed, relying on its running gear to maintain its maneuverability. A collection system collects manganese nodules from the seafloor. The nodule minerals collected by the deep-sea mining vehicle are transported via connecting hoses to a relay station for crushing and processing. The riser and lift pump in the pipeline lifting system then transport the collected polymetallic nodules to the mining vessel.

[0005] Deep-sea polymetallic nodules are typically found in soft, thin sediments at depths of 4,000 to 6,000 meters. Their surface particle sizes range widely, from 2 to 20 centimeters. During the collection process, if the size or particle size of polymetallic nodules exceeds 40 to 50 millimeters, they can severely impact the conveying system. These larger nodules not only increase the power consumption of the conveying system but are also likely to clog the pipelines, forcing the entire deep-sea mining operation to be interrupted. Furthermore, improper handling of the collected mud-water mixture containing polymetallic nodules can cause plume pollution to the environment when deep-sea mining vehicles discharge their tailwater, resulting in a variety of adverse effects. Therefore, minimizing this plume is a challenging problem that must be addressed in deep-sea mining operations.

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

[0007] The plume suppression device designed in patent CN218091160U is a common device for treating tailwater during deep-sea mining, guiding tailwater discharge. However, this application suffers from the following drawbacks: The device is complex, prone to mechanical failure due to large-particle sediment getting stuck in the gear mechanism; and the centrifugal force generated by the rotation of the plume suppression hood expels ore particles from the discharge chute at a high velocity, which can easily generate secondary plumes and result in poor treatment effectiveness.

[0008] Patent CN115288692A describes a mineral mud-water separation and crushing device for seabed mining. The device primarily utilizes an integrated crushing and transmission assembly. During the transmission process, small particles of seabed sediment and water are collected through gaps in the grid bars into a mud-water collection area, achieving separation of minerals from mud-water. However, this application suffers from shortcomings: It fails to fully consider the discharge of the separated mud-water, only considering the impact of lowering the height of the mud-water discharge pipe on the seabed environment, while ignoring the difficulty of small particles of seabed sediment and suspended matter in settling. Summary of the Invention

[0009] Based on the above, the present invention aims to overcome the shortcomings of existing technologies, achieve a particle size suitable for metal nodules transported via hoses to transport vessels, and achieve separation of metal, mud, and water. A device and method for reducing tailwater plume from mining vehicles are proposed. This device addresses the tailwater plume phenomenon by processing data through an intelligent control device, controlling the liquid storage device and centrifugal action device. By adjusting the ratio of magnetic seed to the metal nodule mixture collected by the mining vehicle, the device effectively addresses the plume pollution problem caused by direct discharge of tailwater from 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 tailwater plume of a deep-sea mining vehicle, comprising the following steps:

[0011] (1) When a deep-sea mining vehicle is operating in deep-sea sediments, a water jet from a collection head at the front of the mining vehicle impacts the sediments, and the sediments containing polymetallic nodules are hydraulically collected into the interior of the mining vehicle;

[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 and 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 media. In the centrifuge, centrifugal force and magnetic force precisely 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 0-20 cm, with sticky particles less than 32 μm, accounting for more than 95%, of which 0-1 μm accounts for 10%, 1-10 μm accounts for 70%, 10-100 μm accounts for 17%, and larger than 100 μm accounts for 3%;

[0017] Therefore, for particles of 0-1μm, 0.5μm magnetic seeds are used for treatment; for particles of 1-10μm, 5μm magnetic seeds are used for treatment; for particles of 10-100μm, 50μm magnetic seeds are used for treatment; for particles larger than 100μm, 150μm magnetic seeds are 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 and water treatment system, there are fewer deep-sea sediments 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, used in the method described above, comprising 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 aid storage tank and a coagulant storage tank, the centrifugal device includes a centrifuge, a magnet, a magnetic powder dispenser, and a liquid infusion tube, the intelligent control device includes a central processing unit and a signal receiving and transmitting 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, and its 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 aid 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. The distribution of magnetic seeds of different particle sizes in the centrifuge is determined by the magnetic field arrangement. Large particles are combined with magnetic seeds of large particle size to ensure sufficient binding force and stability; correspondingly, small particles are combined with magnetic seeds of small particle size.

[0023] Furthermore, the intelligent control device is located inside the mining vehicle and has a built-in signal receiving device and 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 includes a magnetic seed storage, a placing pipeline, a recovery pipeline and a magnetic seed recoverer, and the magnetic seed storage stores magnetic seeds of different particle sizes.

[0025] Furthermore, the supermagnetic separation device includes 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 by them.

[0027] Furthermore, the liquid storage device, monitoring device, and intelligent control device are all placed inside the mining vehicle body, and 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 insulation shells to prevent seawater infiltration.

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

[0029] 1. This invention supplements the plume management of deep-sea mining vehicles by proposing a method and device for plume management based on different tailwater particles. When the mining vehicle is operating and collecting water, the operating process and operating parameters of the treatment device are proposed for the collected water. Based on the mechanical properties of deep-sea sediments, the particles mixed in the collected water are subjected to corresponding flocculation treatment, ultimately achieving plume management for the mining vehicle.

[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 (0-20 cm), sticky particles (particle size <32 μm) account for more than 95%, of which 0-1 μm accounts for 10%, 1-10 μm accounts for 70%, 10-100 μm accounts for 17%, and particles larger than 100 μm account for 3%.

[0031] Different treatment methods are adopted for particles of different particle sizes. For large particles, centrifugal separation 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. Currently, in deep-sea mining, tailings are directly discharged to the nearby seafloor via return pipelines after mineral processing. This invention fully considers the complexity of the water collected by seabed mining vehicles. The collected mixture of metallic nodules, thin mud, and seawater is separated through an integrated processing device, ultimately preventing the mixed water from being directly discharged to the seafloor and causing tailwater plume pollution.

[0033] 4. After being mined by deep-sea mining vehicles, metallic nodules are often transported to a specific particle size before being transported from the mining vehicles to upper transport vessels. Existing devices are separate and complex to operate. This device integrates three functions: desludging, crushing, and mud-water separation. This seamlessly interconnected system is simple and efficient.

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

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

[0036] Figure 1 This is a schematic diagram of the overall structure of the seabed mining vehicle according to 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 the crushing device and filtering device of the present invention;

[0039] Figure 4 Schematic diagram of the centrifugal device of the present invention;

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

[0041] Figure 6 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. Rapid 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 accompanying drawings in the implementation examples of this application to clearly and completely describe the schemes in the embodiments of this application. Obviously, the described embodiments are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments of this application, other embodiments obtained by ordinary technicians in this field without making creative efforts are all within the scope of protection of this application.

[0046] The structure, size, ratio and the like in the drawings attached to the present specification are all for matching the content shown in the present specification, to provide understanding and reading for the person skilled in the art, and not to define various conditions of the invention, so it does not have actual significance. Any structural adjustment, size change, ratio change, as long as it does not affect the effect that the invention can produce, should be covered within the scope of the invention. At the same time, various position-limiting words such as "in the vehicle", "both ends" and the like used in the present specification are all for the convenience of description, and not to fix the corresponding position and implementation range. The relative relationship is adjusted, without changing the substance of the technology, it should be considered as the scope of the invention, and the selection of various coagulation materials is not specified.

[0047] As Figures 1 to 7 described, a method and device for reducing the tail water plume of a deep-sea mining vehicle, characterized by comprising the following steps:

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

[0049] (2) After the intelligent control device 5 receives the transmitted real-time data, the data is processed by the central processor 501, and according to the flow size, it is determined how much magnetic seed, coagulant and coagulant is added to the centrifugal device. When the monitoring data is abnormal, the intelligent control device 5 selects the appropriate treatment scheme 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 different proportions of A liquid (polymeric ferric sulfate inorganic polymer coagulant) and B liquid (polyacrylamide organic polymer coagulant) are injected into the centrifugal separator through the pipeline.

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

[0052] (5) The water body after centrifugal action is directly discharged from the upper part, and the adsorbent after the action of the magnetic seed falls into the rapid shearing machine under the action of gravity. The magnetic sludge is quickly crushed by the high-speed shearing machine to realize the separation of the magnetic powder in the magnetic sludge. The sludge is discharged to the seabed by the sludge discharge pipe after compression, 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 by comprising 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 drain 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 pipe, and a recovery pipe. The intelligent control device 5 includes a central processing unit 501, 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 apparatus for reducing the tailwater plume of a deep-sea mining vehicle, the liquid storage device 3 is located inside the mining vehicle, and its liquid storage tank 301 contains two liquids, A and B. Liquid A is an inorganic polymer coagulant, polyferric sulfate, and liquid B is an organic polymer coagulant, polyacrylamide. A control valve has a built-in signal receiving device 502 for controlling the liquid storage tank opening and closing.

[0055] like Figures 1 to 5 In the method and apparatus for reducing the tailwater plume of a deep-sea mining vehicle, the flow sensor 401 is located in the transport pipe before entering the centrifugal device, and is used to monitor the flow of water to be centrifuged by the mining vehicle.

[0056] like Figures 1 to 7 In the method and device for reducing the tailwater plume of a deep-sea mining vehicle, the intelligent control device 5 is located inside the mining vehicle, and the central processing unit 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 processing unit 501 to select the appropriate number of magnetic seeds and injection liquid volume.

[0057] like Figures 1 to 7 In the method and device for reducing the tailwater plume of a deep-sea mining vehicle, the crushing device 1, flow sensor 401, intelligent control device 5, centrifugal device 6 and rapid shearing device 7 are connected to the mining vehicle power supply through insulated wires and are 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 located entirely within the mining vehicle. The liquid storage device 3 and intelligent control device 5 are located within the mining vehicle's body, shielded from high pressure and high salinity, and are made of standard materials. The crushing device 1, filtration device 2, flow sensor 401, deployment pipeline, recovery pipeline, centrifugal device 6, rapid shearing device 7, mud discharge pipe 8, and drain pipe 9 are constructed of high-strength materials due to their direct contact with high-pressure seawater to protect them from damage caused by the deep sea's high pressure.

Claims

1. A method for reducing the tailwater plume of a deep-sea mining vehicle, characterized in that: The following steps are involved: (1) When a deep-sea mining vehicle is operating in deep-sea sediments, the water jet from the collection head at the front of the mining vehicle impacts the sediments and hydraulically collects the sediments containing polymetallic nodules into the interior of the mining vehicle; (2) The collected metal nodules are processed by a crusher and the diameter after processing is 2 to 3 cm; (3) Separation of metal nodules and 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 seeds and coagulation reaction medium. In the centrifuge, the centrifugal force and magnetic force precisely control the position of the magnetic seeds, so that particles of different sizes are coagulated with appropriate magnetic seeds respectively, achieving a better coagulation effect. The specific method is as follows: The particle size distribution of deep-sea surface sediments is 0-20 cm, and the sticky particles are less than 32 μm, accounting for more than 95%, of which 0-1 μm accounts for 10%, 1-10 μm accounts for 70%, 10-100 μm accounts for 17%, and larger than 100 μm accounts for 3%; Therefore, for particles of 0-1μm, 0.5μm magnetic seeds are used for treatment; for particles of 1-10μm, 5μm magnetic seeds are used for treatment; for particles of 10-100μm, 50μm magnetic seeds are used for treatment; for particles larger than 100μm, 150μm magnetic seeds are used for treatment; (5) The sludge is fully combined with the magnetic seeds in the centrifuge, and the mixed combination falls into the rapid shearing device. Under the action of the rapid shearing device, the magnetic seeds in the magnetic sludge are separated; the magnetic seeds are 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 and water treatment system, there are fewer deep-sea sediments 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 placement and recovery device, a liquid storage device, a centrifugal action device, an intelligent control device, and a quick shearing 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 action device includes a centrifuge, a magnet, a magnetic seed dispenser, and an infusion tube. Through centrifugal action, particles of different diameters in seawater are centrifuged to different levels, and the magnetic seeds, coagulants, and coagulants are injected into the centrifuge in sequence to achieve coagulation. 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 large-size magnetic seeds to ensure sufficient binding force and stability; correspondingly, small particles are combined with small-size magnetic seeds; the intelligent control device includes a central processing unit and a signal receiving device and a sending device. The magnetic seed placement and recovery device includes a magnetic seed storage, a placement pipeline, a magnetic seed recoverer, and a recovery pipeline.

3. The device for reducing tailwater plume of a deep-sea mining vehicle according to claim 2, characterized in that: All devices are located inside the mining vehicle, and its 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 aid of polyacrylamide. The control valve has a built-in signal receiving device for controlling the liquid storage tank switch.

4. The device for reducing tailwater plume of a deep-sea mining vehicle according to claim 2, characterized in that: The intelligent control device is located inside the mining vehicle and has a built-in signal receiving device and 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.

5. The device for reducing tailwater plume of a deep-sea mining vehicle according to claim 2, characterized in that: The magnetic seed placing and recovering device comprises a magnetic seed storage, a placing pipeline, a recovery pipeline and a magnetic seed recoverer. Magnetic seeds of different particle sizes are stored in the magnetic seed storage.

6. The device for reducing tailwater plume of a deep-sea mining vehicle according to claim 2, characterized in that: The crushing device, centrifugal action device, intelligent control device and magnetic seed placement and recovery device are connected to the power supply of the mining vehicle through insulated wires and supplied with energy.

7. The device for reducing tailwater plume of a deep-sea mining vehicle according to claim 2, characterized in that: The liquid storage device, monitoring device and intelligent control device are all placed inside the mining vehicle body. The outer shell of the mining vehicle body 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 and magnetic seed placement and recovery pipeline that come into contact with seawater use high-strength aluminum alloy insulation shells to prevent seawater infiltration.

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