Low-energy-consumption deep sea ore lifting system and method

Abstract

The invention provides a low-energy-consumption deep sea ore lifting system and method.The low-energy-consumption deep sea ore lifting system comprises a precipitation cabin, a centrifugal pump and a relay cabin, the centrifugal pump and the precipitation cabin are both arranged on the water surface, the relay cabin is connected with a mining vehicle through an ore collecting hose, and the bottom of the relay cabin is sequentially communicated with an ore conveying pipeline and an ore lifting pipeline; the sedimentation cabin is connected with a suction port of the centrifugal pump through a pump suction port section tailing slurry pipeline, an outlet of the centrifugal pump is connected with one end of a pump outlet section tailing slurry pipeline, the other end of the pump outlet section tailing slurry pipeline is branched to form two pipelines, one pipeline forms a tailing slurry pipeline for balancing pressure and is communicated to the top of the relay cabin, and the other pipeline forms a tailing slurry pipeline for balancing pressure. The other pipeline is connected with an ore conveying pipeline; the sedimentation cabin is used for sedimentation to form tailing slurry, the tailing slurry serves as a carrier to convey ore under the action of the centrifugal pump, and due to the buoyancy effect of fine particles in the carrier phase tailing slurry on large-particle-size ore, the critical flow velocity is reduced by about 15% compared with that of traditional seawater conveying, so that energy is saved by more than 20%.

Description

Technical Field

[0001] The present invention relates to the technical field of deep-sea mining, and in particular to a low-energy consumption deep-sea ore lifting system and method, in particular to a deep-sea ore lifting system and method that circulates fine-particle tailings slurry by configuring a centrifugal pump on the water surface to lift ore from the deep sea to the water surface. Background Art

[0002] With the development of modern science and technology and industry, human demand for mineral resources is increasing. However, the land reserves have dropped sharply in the large-scale exploitation. Countries have turned their attention to the oceans with rich mineral resources and regarded them as new strategic goals for future resource development. It is estimated that the reserves of polymetallic nodules on the ocean floor of the earth are about 3 trillion tons, with 1.7 trillion tons in the Pacific Ocean alone, of which about 70 billion tons are worth industrial exploitation, and the nodule mines are growing at a rate of about 10 million tons per year.

[0003] Deep-sea ore lifting is the core technology and key part of the mining system, mainly including pneumatic lifting, clean water pump lifting and slurry pump lifting. Pneumatic lifting uses compressed air to form a three-phase flow (gas, liquid, solid) in the pipeline to lift the minerals to the sea surface. Although this method is simple in process and easy to install and maintain, its efficiency is low, usually below 15%. Clean water pump lifting injects clean water into the pipeline through a high-pressure pump and uses the power of water to lift the minerals to the sea surface. This method avoids the wear problem of minerals passing through the pump, but because the clean water pump needs to be installed on the seabed, the installation and maintenance costs of the pump are high and the technical difficulty is great. Slurry pump lifting uses a centrifugal pump installed on a vertical lifting pipe to lift the slurry from the seabed to the sea surface. This method is widely used due to its high efficiency and reliability and is considered to be the most promising method. However, the slurry pump directly acts on the ore and is easily worn. In addition, the slurry pump is installed on the vertical lifting pipe, which makes it difficult to maintain and replace. Replacing the slurry pump is even more difficult than replacing the clean water pump installed on the seabed.

[0004] In addition, the environmental impact of deep-sea mining has always been a topic of great concern to the international community, among which the marine environmental pollution caused by tailings discharge is the top priority. Developing low-pollution mining technology is the only way to achieve commercial exploitation of deep-sea mineral resources.

[0005] The patent document with publication number CN104310065A discloses a deep-sea mining valve-controlled clean water pump ore hydraulic lifting equipment, which consists of a storage bin, a clean water pump, an electric valve, a venturi ejector, a bell valve, a hydraulic cylinder, an electromagnetic reversing valve, a slurry separator, an injection pipe and a pipeline. An injection pipe is provided in the storage bin, a bell valve is installed at its upper end, an electric valve is connected to its lower end and installed on the venturi ejector, the right end of the venturi ejector is connected to the electric valve and the clean water pump, and the left end is connected to the slurry hydraulic lifting pipeline. This solution has the advantages of high head and large flow, but it still cannot achieve low-energy lifting of deep-sea ore. Summary of the invention

[0006] In view of the defects in the prior art, the object of the present invention is to provide a low-energy consumption deep-sea ore lifting system and method.

[0007] The low-energy deep-sea ore lifting system provided by the present invention comprises a sedimentation chamber, a centrifugal pump and a relay chamber, wherein the centrifugal pump and the sedimentation chamber are both arranged on the water surface, and the sedimentation chamber is used to sediment the tailings to form tailings slurry;

[0008] The relay cabin is connected to the mining vehicle through an ore collecting hose, and the bottom of the relay cabin is connected to the ore conveying pipeline and the ore lifting pipeline in sequence;

[0009] The sedimentation tank is connected to the centrifugal pump suction port through the tailings slurry pipeline of the pump suction port section, the centrifugal pump outlet is connected to one end of the tailings slurry pipeline of the pump outlet section, and the other end of the tailings slurry pipeline of the pump outlet section is forked to form two pipelines, one of which forms a tailings slurry pipeline for balancing pressure and is connected to the top of the relay tank, and the other pipeline is connected to the ore conveying pipeline;

[0010] The centrifugal pump is used to transport tailings slurry. Under the action of the tailings slurry, the ore inside the relay cabin is lifted in sequence through the ore conveying pipeline and the ore lifting pipeline.

[0011] Preferably, the sedimentation tank is provided with a plurality of independent partitions, each of which is connected to the centrifugal pump suction port via an independent pump suction port section tailings slurry pipeline;

[0012] The tailings slurry pipeline at the pump suction port section is provided with an electric gate valve at the sedimentation chamber outlet.

[0013] Preferably, a hydraulic gate valve for balancing pressure is provided on the tailings slurry pipeline for balancing pressure, and an ore conveying hydraulic gate valve is provided between the bottom of the relay cabin and the ore conveying pipeline.

[0014] Preferably, the relay cabin is provided with a plurality of independent partitions, each partition is connected to the mining vehicle through an independent ore collecting hose, and the ore collecting hose is provided with an ore collecting hydraulic gate valve.

[0015] Preferably, one side of the relay cabin is connected to an overflow pipeline, and an overflow hydraulic gate valve is provided on the overflow pipeline.

[0016] Preferably, the tailings are transported to the sedimentation chamber through a tailings transport pipeline, and a tailings transport hydraulic gate valve is provided on the tailings transport pipeline.

[0017] According to the low-energy consumption deep-sea ore lifting method provided by the inventor, the low-energy consumption deep-sea ore lifting system is adopted, comprising the following steps:

[0018] Step 1: Gather ore to a certain partition of the relay cabin;

[0019] Step 2: Turn on the centrifugal pump, and the tailings slurry in the sedimentation tank is transported to the ore conveying pipeline under the drive of the centrifugal pump. The ore is lifted to the ore processing system under the action of the tailings slurry;

[0020] Step 3: Connect the sedimentation tank to the ore processing system, and introduce the tailings into the sedimentation tank for sedimentation to form tailings slurry.

[0021] Preferably, step 1 comprises the following steps:

[0022] Step 1.1: Open the ore collecting hydraulic gate valve of the target partition on the relay cabin to connect the mining vehicle. At the same time, open the overflow hydraulic gate valve on the partition to achieve seawater overflow;

[0023] Step 1.2: When the ore fills the partition, switch the ore collecting hydraulic gate valve, connect the mining vehicle to another partition, and switch the overflow gate valve to the current ore collecting partition;

[0024] Step 1.3: Close the ore collecting hydraulic gate valve and overflow gate valve of the ore collecting partition that is already filled with ore to complete the ore collecting operation in the target partition of the relay cabin.

[0025] Preferably, step 2 comprises the following steps:

[0026] Step 2.1: Open the electric gate valve at the outlet of the target partition in the sedimentation tank to connect the partition with the inlet of the centrifugal pump;

[0027] Step 2.2: Open the hydraulic gate valve for balancing pressure on the target partition in the relay cabin to connect the partition with the centrifugal pump outlet;

[0028] Step 2.3: Turn on the centrifugal pump to drive the tailings slurry through the ore conveying pipeline and the ore lifting pipeline in sequence;

[0029] Step 2.4: Open the ore conveying hydraulic gate valve at the bottom of the target partition in the relay cabin. The ore falls into the ore conveying pipeline under the action of gravity. The ore is driven by the tailings slurry in the pipe, passes through the ore lifting pipeline, reaches the water surface ore processing system, and completes the ore lifting operation.

[0030] Preferably, step 3 comprises the following steps:

[0031] Step 3.1: Open the tailings conveying hydraulic gate valve of the target partition of the sedimentation tank, connect the ore processing system, and guide the tailings into the target partition of the sedimentation tank;

[0032] Step 3.2: When the target partition of the sedimentation tank is filled to the predetermined standard, the tailings conveying hydraulic gate valve is switched to connect the ore handling system to the other emptied partitions of the sedimentation tank;

[0033] Step 3.3: Close the tailings conveying hydraulic gate valve in this section of the sedimentation tank to complete the sedimentation operation and form tailings slurry for use as a carrier phase.

[0034] Compared with the prior art, the present invention has the following beneficial effects:

[0035] 1. The present invention uses tailings slurry as a carrier to transport ore. Due to the buoyancy effect of particles with a diameter less than 0.1 mm in the carrier phase tailings slurry on large-diameter ore, the tailings slurry transportation can reduce the critical flow rate by about 15% compared with traditional seawater transportation. Therefore, compared with traditional technologies, the present invention can save more than 20% energy.

[0036] 2. The present invention uses tailings slurry as a carrier to transport ore. After the tailings are precipitated, the unprecipitated part is reused as a carrier phase to lift the ore, and it is not directly discharged to the seabed like the traditional hydraulic lifting system. Therefore, the theoretical tailings treatment is completely environmentally friendly and pollution-free.

[0037] 3. The present invention adopts the technical means of installing the centrifugal pump above the water surface, which is convenient for maintenance and replacement, can greatly improve system safety and reduce operating costs;

[0038] 4. The present invention adopts the technical means of storing ore in a relay cabin, and the ore does not pass through a centrifugal pump, so the wear of the centrifugal pump is greatly reduced, the service life is extended, and the manufacturing difficulty is correspondingly reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0040] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0041] Figure 2 It is a structural schematic diagram of the sedimentation tank in the present invention;

[0042] Figure 3 It is a schematic diagram of the structure of the relay cabin in the present invention from a top-down perspective;

[0043] Figure 4 It is a schematic diagram of the structure of the relay cabin in the present invention from a side view.

[0044] The figure shows:

[0045] Sedimentation tank 1 Overflow pipeline 10

[0046] Electric gate valve at the outlet of sedimentation tank 2 Hydraulic gate valve for ore transportation 11

[0047] Tailings slurry pipeline at pump suction port 3 Hydraulic gate valve for ore collection 12

[0048] Centrifugal pump 4 Ore collection hose 13

[0049] Pump outlet section tailings slurry pipeline 5 Mining vehicle 14

[0050] Relay cabin 6 Ore transportation pipeline 15

[0051] Hydraulic gate valve for balanced pressure 7 Ore lifting pipeline 16

[0052] Tailings slurry pipeline for pressure balance 8 Tailings conveying hydraulic gate valve 17

[0053] Overflow hydraulic gate valve 9 Tailings conveying pipeline 18 DETAILED DESCRIPTION

[0054] The present invention is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those of ordinary skill in the art, several changes and improvements can also be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0055] The present invention discloses a low-energy consumption deep-sea ore lifting system and method. A centrifugal pump and a tailings sedimentation chamber are arranged on the water surface, an ore relay chamber is arranged on the seabed, and the centrifugal pump is used to transport the tailings slurry containing fine particles after sedimentation treatment to a seabed pipeline. At the same time, a valve is used to control the ore in the relay chamber to fall into the seabed pipeline under the action of gravity. The lift provided by the tailings slurry containing fine particles is used to lift the ore from the relay chamber to the water surface, thereby achieving low energy consumption, low pollution, easy maintenance and high reliability.

[0056] Example 1

[0057] This embodiment provides a low-energy consumption deep-sea ore lifting system, such as Figure 1As shown, it includes a sedimentation tank 1, a centrifugal pump 4 and a relay tank 6. The centrifugal pump 4 and the sedimentation tank 1 are both arranged on the water surface. The sedimentation tank 1 is used to precipitate the tailings to form tailings slurry; the relay tank 6 is connected to the mining vehicle 14 through the ore collecting hose 13, and the bottom of the relay tank 6 is connected to the ore conveying pipeline 15 and the ore lifting pipeline 16 in sequence;

[0058] The sedimentation tank 1 is connected to the suction port of the centrifugal pump 4 through the tailings slurry pipeline 3 of the pump suction port section, the outlet of the centrifugal pump 4 is connected to one end of the tailings slurry pipeline 6 of the pump outlet section, and the other end of the tailings slurry pipeline 6 of the pump outlet section is forked to form two pipelines, one of which forms a tailings slurry pipeline 8 for balancing pressure and is connected to the top of the relay tank 6, and the other pipeline is connected to the ore conveying pipeline 15; the centrifugal pump 4 is used to convey tailings slurry, and the ore inside the relay tank 6 is lifted in turn through the ore conveying pipeline 15 and the ore lifting pipeline 16 under the action of the tailings slurry.

[0059] like Figure 2 As shown, the sedimentation tank 1 is provided with a plurality of independent partitions, each of which is connected to the suction port of the centrifugal pump 4 through an independent pump suction port section tailings slurry pipeline 3; the pump suction port section tailings slurry pipeline 3 is provided with a sedimentation tank outlet electric gate valve 2. The tailings slurry pipeline 8 for balancing pressure is provided with a hydraulic gate valve 7 for balancing pressure, and an ore conveying hydraulic gate valve 11 is provided between the bottom of the relay tank 6 and the ore conveying pipeline 15. The tailings are conveyed to the sedimentation tank 1 through the tailings conveying pipeline 18, and the tailings conveying hydraulic gate valve 17 is provided on the tailings conveying pipeline 18.

[0060] like Figure 3 As shown, the relay cabin 6 is provided with a plurality of independent partitions, each of which is connected to a mining vehicle 14 through an independent ore collecting hose 13, and a ore collecting hydraulic gate valve 12 is provided on the ore collecting hose 13. An overflow pipeline 10 is connected to one side of the relay cabin 6, and an overflow hydraulic gate valve 9 is provided on the overflow pipeline 10.

[0061] Example 2

[0062] This embodiment, as a preferred embodiment of Embodiment 1, provides a low-energy consumption deep-sea ore lifting system, including a sedimentation chamber 1, an electric gate valve 2 at the sedimentation chamber outlet, a tailings slurry pipeline 3 at the pump suction port section, a centrifugal pump 4, a tailings slurry pipeline 3 at the pump outlet section, a relay chamber 6, a hydraulic gate valve 7 for balancing pressure, a tailings slurry pipeline 8 for balancing pressure, an overflow hydraulic gate valve 9, an overflow pipeline 10, an ore conveying hydraulic gate valve 11, a ore collecting hydraulic gate valve 12, an ore collecting hose 13, a mining vehicle 14, an ore conveying pipeline 15 and an ore lifting pipeline 16.

[0063] like Figure 1As shown, by controlling the vertical position of the tailings slurry pipeline 3 of the pump suction section at the entrance of the sedimentation chamber 1, the concentration of the tailings slurry is controlled to adapt to the particle size and gradation of the lifted ore; the volume of ore falling into the ore conveying pipeline 15 per unit time can be controlled by jointly controlling the opening of the hydraulic gate valve 7 for balancing the pressure and the ore conveying hydraulic gate valve 11 to meet the best match with the carrier phase concentration and flow rate; at the same time, the rotation speed of the centrifugal pump 4 can be controlled to adjust the slurry flow rate, to achieve the best match of multiple factors such as slurry flow rate, carrier phase concentration, carrier phase gradation, ore concentration, ore gradation, etc., to achieve the minimum single energy consumption for lifting ore.

[0064] like Figure 2 As shown, it also includes a tailings conveying hydraulic gate valve 17 and a tailings conveying pipeline 18. By controlling the tailings conveying hydraulic gate valve 17, the tailings slurry is selected to be conveyed to the prepared sedimentation tank 1 partition; after sedimentation is completed, the electric gate valve 2 at the sedimentation tank outlet is used to select the appropriate sedimentation tank 1 partition in a predetermined order to supply the tailings slurry to the centrifugal pump 4.

[0065] like Figure 3 , Figure 4 As shown, by controlling the vertical position of the overflow pipeline 10 in the relay chamber 6, the overflow volume can be controlled to cooperate with the ore collection operation; by controlling the ore collection hydraulic gate valve 12, the ore can be selected to be collected in the target partition of the relay chamber 6; similarly, by controlling the ore conveying hydraulic gate valve 11, the ore in different partitions of the relay chamber 6 can be selected to be lifted.

[0066] Embodiment 3:

[0067] This embodiment provides a low-energy consumption deep-sea ore lifting method, which uses the low-energy consumption deep-sea ore lifting system in Embodiment 1 or Embodiment 2, and includes the following steps:

[0068] First, the ore is collected to a certain partition of the relay cabin 6, including the following steps:

[0069] Step 1.1: Open the ore collecting hydraulic gate valve 12 of the target partition on the relay cabin 6 to connect the mining vehicle 14, and at the same time, open the overflow hydraulic gate valve 9 on the partition to achieve seawater overflow;

[0070] Step 1.2: When the ore fills the partition, switch the ore collecting hydraulic gate valve 12, connect the mining vehicle 14 to another partition, and switch the overflow gate valve 9 to the current ore collecting partition;

[0071] Step 1.3: Close the ore collecting hydraulic gate valve 12 and the overflow gate valve 9 of the ore collecting partition that is already filled with ore, and complete the ore collecting operation of the target partition of the relay cabin 6.

[0072] Then, the centrifugal pump 4 is turned on, and the tailings slurry in the sedimentation chamber 1 is transported to the ore conveying pipeline 15 driven by the centrifugal pump 4. The ore is lifted to the ore processing system under the action of the tailings slurry, which specifically includes the following steps:

[0073] Step 2.1: Open the electric gate valve 2 at the outlet of the sedimentation tank 1 where sedimentation has been completed, and connect the partition with the inlet of the centrifugal pump 4;

[0074] Step 2.2: Open the hydraulic gate valve 7 for balancing the pressure on the ore-collecting partition in the relay cabin 6 to connect the partition with the outlet of the centrifugal pump 4;

[0075] Step 2.3: Turn on the centrifugal pump 4 to drive the tailings slurry to pass through the ore conveying pipeline 15 and the ore lifting pipeline 16 in sequence;

[0076] Step 2.4: Open the ore conveying hydraulic gate valve 11 at the bottom of the partition of the hydraulic gate valve 7 for balancing the pressure in step 2.2 in the relay cabin 6. The ore falls into the ore conveying pipeline 15 under the action of gravity. The ore is driven by the tailings slurry in the pipe, passes through the ore lifting pipeline 16, reaches the surface ore processing system, and completes the ore lifting operation.

[0077] Preferably, in order to achieve the best ore lifting effect, the tailings slurry concentration is defined as less than 20%, the particle size is less than 1 mm, and the conveying ore concentration is 20%-40%.

[0078] Finally, the sedimentation tank 1 is connected to the ore processing system, and the tailings are introduced into the sedimentation tank 1 for sedimentation to form tailings slurry, which specifically includes the following steps:

[0079] Step 3.1: Open the tailings conveying hydraulic gate valve 17 of a certain emptying partition of the sedimentation tank 1, connect the ore processing system, and guide the tailings into the target partition of the sedimentation tank 1;

[0080] Step 3.2: When the target partition of the sedimentation tank 1 is filled to a predetermined standard, the tailings conveying hydraulic gate valve 17 is switched to connect the ore processing system to other emptied partitions of the sedimentation tank 1;

[0081] Step 3.3: Close the tailings conveying hydraulic gate valve 17 of the partition of the sedimentation chamber 1 to complete the sedimentation operation and form tailings slurry to be used as a carrier phase.

[0082] In the description of the present application, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0083] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essence of the present invention. In the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other arbitrarily.

Claims

1. A low energy consumption deep sea ore lifting system, characterized in that: It comprises a sedimentation tank (1), a centrifugal pump (4) and a relay tank (6), wherein the centrifugal pump (4) and the sedimentation tank (1) are both arranged on the water surface, and the sedimentation tank (1) is used to perform sedimentation treatment on tailings to form tailings slurry; The relay cabin (6) is connected to the mining vehicle (14) via an ore collecting hose (13), and the bottom of the relay cabin (6) is connected to an ore conveying pipeline (15) and an ore lifting pipeline (16) in sequence; The sedimentation chamber (1) is connected to the suction port of a centrifugal pump (4) through a tailings slurry pipeline (3) at a pump suction port section, the outlet of the centrifugal pump (4) is connected to one end of a tailings slurry pipeline (6) at a pump outlet section, the other end of the tailings slurry pipeline (6) at the pump outlet section is bifurcated to form two pipelines, one of which forms a tailings slurry pipeline (8) for balancing pressure and is connected to the top of the relay chamber (6), and the other pipeline is connected to an ore conveying pipeline (15); The centrifugal pump (4) is used to transport tailings slurry. Under the action of the tailings slurry, the ore inside the relay cabin (6) is lifted in sequence through the ore conveying pipeline (15) and the ore lifting pipeline (16).

2. The low energy consumption deep sea ore lifting system according to claim 1 is characterized in that: The sedimentation tank (1) is provided with a plurality of independent partitions, each of which is connected to the suction port of a centrifugal pump (4) via an independent pump suction port section tailings slurry pipeline (3); The tailings slurry pipeline (3) at the pump suction port section is provided with an electric gate valve (2) at the sedimentation chamber outlet.

3. The low energy consumption deep sea ore lifting system according to claim 1 is characterized in that: A pressure balancing hydraulic gate valve (7) is provided on the pressure balancing tailings slurry pipeline (8), and an ore conveying hydraulic gate valve (11) is provided between the bottom of the relay cabin (6) and the ore conveying pipeline (15).

4. The low energy consumption deep sea ore lifting system according to claim 1, characterized in that: The relay cabin (6) is provided with a plurality of independent partitions, each partition is connected to a mining vehicle (14) via an independent ore collecting hose (13), and a ore collecting hydraulic gate valve (12) is provided on the ore collecting hose (13).

5. The low energy consumption deep sea ore lifting system according to claim 1, characterized in that: One side of the relay cabin (6) is connected to an overflow pipeline (10), and an overflow hydraulic gate valve (9) is arranged on the overflow pipeline (10).

6. The low energy consumption deep sea ore lifting system according to claim 1, characterized in that: The tailings are transported to the sedimentation chamber (1) via a tailings transport pipeline (18), and a tailings transport hydraulic gate valve (17) is provided on the tailings transport pipeline (18).

7. A low-energy consumption deep-sea ore lifting method, characterized in that: The low-energy consumption deep-sea ore lifting system according to any one of claims 1 to 8 comprises the following steps: Step 1: Gathering ore to a certain partition of the relay cabin (6); Step 2: Turn on the centrifugal pump (4), and the tailings slurry in the sedimentation chamber (1) is transported to the ore conveying pipeline (15) driven by the centrifugal pump (4), and the ore is lifted to the ore processing system under the action of the tailings slurry; Step 3: Connect the sedimentation tank (1) to the ore processing system, and introduce the tailings into the sedimentation tank (1) for sedimentation to form tailings slurry.

8. The low-energy consumption deep-sea ore lifting method according to claim 7, characterized in that: The step 1 comprises the following steps: Step 1.1: Open the ore collecting hydraulic gate valve (12) of the target partition on the relay cabin (6) to connect the mining vehicle (14), and at the same time, open the overflow hydraulic gate valve (9) on the partition to achieve seawater overflow; Step 1.2: When the ore fills the partition, switch the ore collecting hydraulic gate valve (12), connect the mining vehicle (14) to another partition, and switch the overflow gate valve (9) to the current ore collecting partition; Step 1.3: Close the ore collecting hydraulic gate valve (12) and the overflow gate valve (9) of the ore collecting partition that has been filled with ore, and complete the ore collecting operation of the target partition of the relay cabin (6).

9. The low-energy consumption deep-sea ore lifting method according to claim 7, characterized in that: The step 2 comprises the following steps: Step 2.1: Open the electric gate valve (2) at the outlet of the target partition in the sedimentation tank (1) to connect the partition with the inlet of the centrifugal pump (4); Step 2.2: Open the hydraulic gate valve (7) for balancing pressure on the target partition in the relay cabin (6) to connect the partition with the outlet of the centrifugal pump (4); Step 2.3: Turn on the centrifugal pump (4) to drive the tailings slurry to pass through the ore conveying pipeline (15) and the ore lifting pipeline (16) in sequence; Step 2.4: Open the ore conveying hydraulic gate valve (11) at the bottom of the target partition in the relay cabin (6), and the ore falls into the ore conveying pipeline (15) under the action of gravity. The ore is driven by the tailings slurry in the pipeline, passes through the ore lifting pipeline (16), and reaches the surface ore processing system, completing the ore lifting operation.

10. The low-energy consumption deep-sea ore lifting method according to claim 7, characterized in that: The step 3 comprises the following steps: Step 3.1: Open the tailings conveying hydraulic gate valve (17) of the target partition of the sedimentation tank (1), connect the ore processing system, and guide the tailings into the target partition of the sedimentation tank (1); Step 3.2: When the target partition of the sedimentation tank (1) is filled to a predetermined standard, the tailings conveying hydraulic gate valve (17) is switched to connect the ore handling system to the other emptied partitions of the sedimentation tank (1); Step 3.3: Close the tailings conveying hydraulic gate valve (17) of the partition of the sedimentation chamber (1) to complete the sedimentation operation and form tailings slurry to be used as a carrier phase.

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