154 results about "Deep sea mining" patented technology

Applicants have created a method and system of deep sea mining comprising mining SMS deposits from the sea floor with a subsea miner, pumping the solids from the subsea miner through a jumper and pumping the solids from the jumper up a riser to a surface vessel. Further, applicants have created a method of deploying a deep sea mining system, comprising stacking a riser hangoff structure on top of a subsea pump module forming an assembly; picking up the assembly by a hanging mechanism, hanging the assembly on a moon pool, attaching a first riser joint; disconnecting the riser hangoff structure from the assembly; and attaching at least one second riser joint to form the riser.

The invention relates to a novel lifting system for dee-sea mining. The novel lifting system comprises a mining mechanism, a mine water lifting mechanism and a mine water separating mechanism; the mining mechanism comprises a mining cart which is arranged on the sea floor, a mining cart ore absorbing port is arranged on the front part of the mining cart, and a mining cart ore conveying pump is arranged on the rear part of the mining cart ore absorbing port; the mine water lifting mechanism comprises a high-pressure water feeding pump, a lifting main pipe, a water feeding pipe and a middle bin;the middle bin is connected with a fixed pile which is arranged on the sea floor bottom crust through a middle bin sea floor fixing cable rope, the middle bin is connected with the mining cart through a hose, and a floating body is arranged on the hose; the mine water separating mechanism comprises an ore storage tank, a mine water separating mechanism body and a clean water tank which are arranged on a sea surface mining vessel; and the ore storage tank is connected with the clean water tank through the mine water separating mechanism body. The novel lifting system for deep-sea mining has the advantages that hydraulic power is used for lifting, waste water lifted to the water surface can be fed back to the sea floor, meanwhile, a lifting pump on the sea floor can be driven to lift ore through the waste water, and the environment of the mining sea surface is protected.

The invention discloses a heave compensation simulation test device for deep-sea mining. The outer ring of a gimbal frame device (2) is connected with the upper platform of a mining ship movement simulator (1); the inner ring of the gimbal frame device (2) is connected with an active heave compensation device (3); an attitude sensor (6) is mounted on the upper platform of the mining ship movement simulator (1); a cylinder displacement sensor (7) is mounted on the cylinder of the mining ship movement simulator (1); a heave compensation device displacement sensor (5) is connected with the active heave compensation device (3); a simulation pipe system (4) is connected with the active heave compensation device (3); the signal output ends of the attitude sensor (6), the cylinder displacement sensor (7) and the heave compensation device displacement sensor (5) are connected with the input end of a controller (8); and the output end of the controller (8) is connected with the control ends of the mining ship movement simulator (1) and the active heave compensation device (3). The invention can achieve the performance testing of the heave compensation simulation test device for deep-sea mining, thereby providing the basis for the design of the heave compensation system for deep-sea mining.

The invention provides deep-sea mining valve control type clean water pump ore hydraulic lifting equipment, which consists of a material storage cabin, a clean water pump, an electric valve, a Venturi ejector, a clock valve, a hydraulic cylinder, an electromagnetic reversing valve, an ore pulp separator, a spraying pipe and a pipeline, wherein the spraying pipe is arranged in the material storage cabin, the clock valve is arranged at the upper end of the material storage cabin, the lower end of the material storage cabin is connected with the electric valve and is arranged on the Venturi ejector, the right end of the Venturi ejector is connected with the electric valve and the clean water pump, and the left end of the Venturi ejector is connected with an ore pulp hydraulic lifting pipeline. The ore pulp separator arranged on the clock valve is used for separating ore pulp, the hydraulic cylinder can be controlled through the electromagnetic reversing valve to close and open the clock valve, and the pressure differences inside and outside the material storage cabin are very great, so a pilot valve is designed in a clock valve piston. Through the control on various valves in the equipment, ores can be mixed into the hydraulic lifting pipeline from the material storage cabin to be lifted to the sea surface. The equipment provided by the invention has the characteristics that the pump lift is high, the weight is light, the flow rate is great, the long-time reliable work is realized, and the like, so the equipment has good application prospects.

Applicants have created a method and system of deep sea mining comprising mining SMS deposits from the sea floor with a subsea miner, pumping the solids from the subsea miner through a jumper and pumping the solids from the jumper up a riser to a surface vessel. Further, applicants have created a method of deploying a deep sea mining system, comprising stacking a riser hangoff structure on top of a subsea pump module forming an assembly; picking up the assembly by a hanging mechanism, hanging the assembly on a moon pool, attaching a first riser joint; disconnecting the riser hangoff structure from the assembly; and attaching at least one second riser joint to form the riser.

The invention discloses a hydraulic conveying testing system for deep sea mining. The hydraulic conveying testing system for the deep sea mining comprises a water surface supporting platform, an intermediate bin, an uplink conveying pipe, a downlink conveying pipe, a feed bin, an intermediate bin, a feeding machine, an ore collecting machine and the like, wherein the uplink conveying pipe is connected between the intermediate bin and the water surface supporting platform; the feed bin is arranged in the intermediate bin and connected with the uplink conveying pipe through the feeding machine; the ore collecting machine is connected with the feed bin through a conveying pipeline; the uplink conveying pipe is connected with a lifting pump in series; the uplink conveying pipe is provided with an emergency blow-down valve above the lifting pump, and the emergency blow-down valve is used for plugging the uplink conveying pipe and discharging materials out of the uplink conveying pipe; the downlink conveying pipe is communicated with the uplink conveying pipe through the intermediate bin. The hydraulic conveying testing system for the deep sea mining is capable of meeting the conveying requirements of coarse-granule ores and avoiding blockage, and is good in safety.

Applicants have created a method and system of deep sea mining comprising mining SMS deposits from the sea floor with a subsea miner, pumping the solids from the subsea miner through a jumper and pumping the solids from the jumper up a riser to a surface vessel. Further, applicants have created a method of deploying a deep sea mining system, comprising stacking a riser hangoff structure on top of a subsea pump module forming an assembly; picking up the assembly by a hanging mechanism, hanging the assembly on a moon pool, attaching a first riser joint; disconnecting the riser hangoff structure from the assembly; and attaching at least one second riser joint to form the riser.

The invention discloses water surface support launching and retrieval system for deep sea mining engineering. The water surface support launching and retrieval system for deep sea mining engineering comprises a moon pool valve device, a cable launching and retrieval device, a mining car launching and retrieval device, a pipeline automatic docking and disassembly device, a pipeline storage and transport and auxiliary connection device, a tower frame and lifting device, a hose launching and retrieval device, and a auxiliary operating device. Each device is arranged on the periphery of the moon pool and a deck of a ship tail. The water surface support launching and retrieval system for deep sea mining engineering is used to safely launch all the equipment and auxiliary facilities of the underwater mining system in the specified sea condition to the required operating points under the water, and all the equipment and facilities can be safely retrieved to a surface mother ship in the specified sea condition. Operation cooperative control can be carried out by a central control room in the launching and retrieval system, the operation can also be carried out near a device machine. The water surface support launching and retrieval system for deep sea mining engineering is reasonable in space arrangement, and closely connected in work process. The operation of the launching and retrieval is completed safely and reliably, and the efficiency of the launching and retrieval is improved effectively.

The invention discloses an integrated deep-sea mining vehicle which includes a walking mechanism, a vehicle frame, a cutting device, a collecting device, a hydrocyclone, a material bin, and a liftingdevice. The cutting device includes a cutting head, a movable arm, a bracket and a hydraulic cylinder, the cutting head is installed at one end of the movable arm, the cutting head is driven to rotateby a driving device, the other end of the movable arm is hinged to the top of the bracket, a piston rod of the hydraulic cylinder is connected to the middle part of the movable arm, and a cylinder barrel is hinged to the bottom of the bracket. The collecting device includes an ore suction chamber, a hard tube, a hose and a centrifugal pump which are in communication in sequence, the ore suction chamber is arranged inside the cutting head, the discharge end of the centrifugal pump is in communication with the hydrocyclone, and the hydrocyclone is in communication with the material bin througha pipeline. The integrated deep-sea mining vehicle integrates the mining processes such as leveling, cutting, collection, and separation, economical, efficient, reliable, and continuous deep-sea mining operations are realized, and the integrated deep-sea mining vehicle is suitable for large-scale mining of seabed polymetallic sulfide ores.

Systems and methods for recovering manganese nodules from the seabed are disclosed. A buoyant body is generated by freezing water, forming a clathrate ice, or using a liquid that is less dense than seawater. Nodules that have been collected from the seabed are incorporated into or otherwise coupled to the buoyant body. The buoyant body is then released to make a free or tethered ascent to the surface.

The invention relates to the technical field of hollow balls applied in ocean engineering (such as drilling riser buoyancy modules, distributed buoyancy modules, deep-sea mining and ultra-deep water submersible buoyancy modules), in particular to a hollow ball with the ball wall made from a composite material and a layer-by-layer coating method for manufacturing the hollow ball. The hollow ball comprises a ball wall layer which is filled with hollow glass microbeads. The hollow ball is simple in structure and high in practicability.

The invention discloses a floating submarine high-precision transient electromagnetic detection system which includes a deck control platform, an ROV (Remote Operated Vehicle) near-seabed work platform, an underwater information acquisition control system and an umbilical cable. The ROV near-seabed work platform is connected with the deck control platform through the umbilical cable. The underwater information acquisition control system is set on the ROV near-seabed work platform. An electromagnetic detector is mounted on an ROV, and a navigation and positioning system is added to the detector, so that the electromagnetic detector can reach a specified detection point and carry out detection according to a specified trajectory. The height of the antenna of the detector relative to the seabed is accurately controlled, so that effective, fast and convenient implementation of a deep-sea transient electromagnetic instrument is realized. The floating submarine high-precision transient electromagnetic detection system has the ability of submarine electrical structure fine exploration, is suitable for rapid exploration of polymetallic sulfide and cobalt-rich crust deposits at the seabed,and provides more scientific guidance for deep-sea mining vehicles to walk and exploit the seabed in the later stage.

The invention discloses a walking crawler device of a crawler-type deep sea mining vehicle, which comprises two walking crawlers installed on the two sides of a crawler support, wherein a plurality oflong crawler teeth and a plurality of short crawler teeth are arranged on the walking crawlers at intervals, and the height of the long crawler teeth is greater than that of the short crawler teeth;when the long crawler teeth are completely inserted into soil, an acute angle is formed between the arrangement direction of the long crawler teeth and the advancing direction of the walking crawler;a long toothed plate is an arc plate, the middle part of the long crawler tooth is sunken backwards relative to the advancing direction of the mining vehicle, a middle reinforcing rib beam is vertically arranged in the middle of the convex surface, and side edge reinforcing rib beams are vertically arranged at the two ends of the convex surface; the short crawler tooth is a wedge-shaped body witha certain height and width, the interior of the wedge-shaped short crawler tooth is in a hollow state, a short crawler tooth rib beam for supporting and reinforcing is arranged in the middle of an inner cavity of the wedge-shaped short crawler tooth, and stepped micro bulges are arranged on the outer surface of the wedge-shaped short crawler tooth in the length direction. The walking crawler device can enable the crawler-type deep sea mining vehicle to have better propelling performance, and prevents the crawler-type deep sea mining vehicle from slipping, sinking and laterally moving.

The invention discloses an experiment device and an experiment method for a deep sea mining conveying hose spatial structure. The experiment device comprises a pool, a pipe morphology acquisition device, a bottom displacement simulation device, a conveying hose simulation device and a camera, wherein the bottom displacement simulation device is fixed on the bottom surface of the pool; the pipe morphology acquisition device is fixed at the upper end of the pool; the pipe morphology acquisition device comprises a hose position detector and a hose position detector displacement device; the conveying hose simulation device is connected between the bottom displacement simulation device and the pipe morphology acquisition device. Transverse and longitudinal positions of the lower end of the conveying hose simulation device can be changed by the bottom displacement simulation device, the camera is fixed on a side wall of the pool to capture the spatial form of a pipe under water, the spatialform of the pipe under water is embodied by changing the positions of the hose position detector and acquiring spatial coordinates of different positions of the pipe, meanwhile, the spatial coordinates of the pipe in the positions are recorded, and thus the actual spatial form of the pipe under water can be acquired.

The invention discloses an ultrasonic micro-terrain detection system in a deep sea mining reverberation environment. The ultrasonic micro-terrain detection system comprises an arbitrary waveform generation module, a transceiving integrated ultrasonic probe, a signal transmitting and receiving conversion circuit, a signal preprocessing module, a data acquisition card and an industrial personal computer. The arbitrary waveform generation module comprises an arbitrary waveform output board card and a power amplifier. The output waveform parameters of the arbitrary waveform output board card are set by the industrial personal computer. The signal preprocessing module comprises a time gain compensation circuit, a gain control circuit, and an amplifying and filtering circuit. By means of the system, according to different reverberation environments, the real-time calculation of transmitted waves can be realized, and the self-adaptive waveform transmitting requirements under different reverberation environments are met. Meanwhile, the waveform replacement is simple and convenient. The signal transmitting and receiving conversion circuit can be used for isolating a transmitting circuit relatively high in exciting voltage from an echo signal receiving circuit low in voltage. The interference of reverberation can be effectively inhibited by the signal preprocessing module. As a result, the ultrasonic detection requirement of the underwater reverberation environment can be met.

The invention relates to a deep-sea mining conveying hard pipe clamping and swinging device which is used for hard pipe arranging and recycling in the deep-sea mining engineering. The deep-sea miningconveying hard pipe clamping and swinging device is composed of a moon pool work platform, a movable door assembly, a movable slip, a universal joint, a hydraulic pump station and an electrical control system of the hydraulic pump station. The diameter of a through hole of a movable door is designed according to the size of hard pipes used in the sea mining engineering, and core supplementing or core changing is not needed. A perpendicular overturning oppositely-opening manner is adopted for opening and closing of the movable door, a hydraulic oil cylinder is installed below the moon pool workplatform for controlling the angle and speed of the movable door, and the space around the work platform is not occupied. The movable slip and the universal joint can be used for clamping a pipelineso as to facilitate butt joint, in addition, inclination or deflection with a certain angle of the pipeline in the horizontal direction can be compensated for, and the pipeline is prevented from beingextruded to bend or generate cracks under the underwater ocean current effect. By means of the deep-sea mining conveying hard pipe clamping and swinging device, conveying hard pipe arranging and recycling can be achieved, and therefore the work process can be accurate, reliable and coherent.

The invention relates to the technical field of hollow spheres applied to ocean engineering (such as a drilling riser buoyancy module, a distributed buoyancy module, deep-sea mining, and an ultra-deepwater submersible buoyancy module), in particular to a sandwich-type composite hollow sphere and a layer-by-layer cladding method for manufacturing the hollow sphere. The sandwich-type composite hollow sphere sequentially comprises an outermost layer, an interlayer and an innermost layer which are mutually connected from outside to inside; the interlayer is filled with hollow glass microspheres. The sandwich-type composite hollow sphere is simple in structure and high in practicability.

The invention relates to the technical field of deep sea mining equipment, in particular to a seabed polymetallic nodule mining vehicle and a mining method thereof. The seabed polymetallic nodule mining vehicle comprises a vehicle body, a crawler walking device, a vehicle head, mineral enrichment devices, a transfer device, an ore storage and unloading device and a seabed topography self-adaption system, wherein the mineral enrichment devices are symmetrically arranged on the two sides of the front end of the vehicle body; the transfer device is arranged behind the mineral enrichment devices; the ore storage and unloading device is installed on the rear portion of the vehicle body; and the above devices cooperate to realize collection and transfer of seabed polymetallic nodules. The seabed polymetallic nodule mining vehicle is a large-range and efficient seabed polymetallic nodule mining vehicle which has a seabed topography self-adaption adjusting function and is suitable for severe seabed conditions and complex topography, the efficient and reliable seabed operation can be achieved, and meanwhile the damage to the deep sea environment in the seabed mining process is reduced.

The invention relates to the technical field of deep-sea mining, in particular to a hydraulic power and air lift integrated deep-sea mining lifting system. The hydraulic power and air lift integrated deep-sea mining lifting system comprises a sea surface mining ship, a mineral storage container, a lifting vertical pipe and a hydraulic lifting source. The lifting vertical pipe is upwards laid onto the sea surface mining ship through the mineral storage container, a mixture is conveyed from the mineral storage container to the sea surface mining ship through driving of the hydraulic lifting source, and an air compression container is installed on the sea surface mining ship; and an upper pipeline access point and an air injecting pipe body are arranged on the lifting vertical pipe, one end of the air injecting pipe body is connected to the upper pipeline access point, and the other end of the air injecting pipe body is connected to an outlet of the air compression container. The hydraulic power and air lift integrated deep-sea mining lifting system has the beneficial effects that the power and quantity of the hydraulic lifting source does not need to be greatly increased, the structure is simplified, and input energy is reduced. Pipelines such as the lifting vertical pipe adopt flexible pipelines, and the hydraulic power and air lift integrated deep-sea mining lifting system can be more suitable for seabed mining operation under a severe sea condition environment.

The invention provides a wear-resisting high-pressure-resisting nonmetal composite flexible pipe used for mining and a preparing method and application of the wear-resisting high-pressure nonmetal composite flexible pipe. The wear-resisting high-pressure-resisting nonmetal composite flexible pipe is provided with a multilayer pipe wall structure and comprises a thermoplastic polyurethane lining layer, a pressure-resisting fiber enhancement layer and an outer protection layer. The pressure-resisting fiber enhancement layer is arranged between the thermoplastic polyurethane lining layer and theouter protection layer. The flexible pipe can be used in the field of mining, especially deep ocean mining and is used for conveying liquid-solid and gas-solid dual-phase and multi-phase flow used formining of ore sand having requirements for ultrahigh wear-resisting performance, impact-resisting performance and high-pressure-resisting performance of pipelines.

The invention relates to a solid-liquid two-phase hydraulic design method used for a deep-sea mining mine lifting pump and belongs to the technical field of deep-sea mining mine lifting pumps. Solid-liquid slurry enters a ring-shaped runner in an outer cylinder from an inlet section in the manner that a driving motor drives a driving main shaft to drive guide vanes in multiple impellers, and thenthe solid-liquid slurry passes through a suction section, and the solid-liquid slurry is discharged from a split section finally under rotating pressurizing of the guide vanes, wherein the impellers and the guide vanes are ring-shaped rotation body structures. By means of the mine lifting pump, clean water runner design calculation is combined, the slurry conveying theory is also met, and design of the runner shape is achieved from the aspects of liquid flow speed and overflowing section area dependency, slurry viscosity precipitation and global viscosity changing. The beneficial effects thatthe structure is compact, flow passing is smooth, wear resistance is high, the solid-liquid conveying efficiency is high, and the service life is long are achieved. The enough runner axial passing capability is ensured, and particles are prevented from blocking a runner. The overflowing speed is increased, axial vortexes are eliminated, it is ensured that downstream through flow has enough kineticenergy, and local vortexes and blockage are effectively prevented.

A relay bin system of a deep sea ore conveying device is disclosed. The system includes a first relay bin assembly, a second relay bin assembly, a pincerlike discharging device hydraulic control system, a rigid supporting bar, a water pump, a jet flow hydraulic control system, pipelines, and the like. Polymetallic nodules in the seabed are collected by an ore collector, subjected to desliming andcrushing, and are then conveyed to the relay bin system through an ore pulp conveying hose. Bottom ends of lifting rigid tubes are provided with flared ports, and lower bin bodies below the flared ports are provided with jet flow holes. During ore conveying, high-pressure fluid discharged by the water pump passes through jet flow connection end covers and jet flow holes and then form vertical upward water jet flows at the bottom ends of the lower bin bodies, ore particles settled at the bottom ends of the lower bin bodies are continuously suctioned to a sea surface mining ship under a suctionfunction of an ore pulp pump and a water striking function of the jet flows. The relay bin system is simple in structure and reasonable in design, and effectively overcomes a problem that ore is liable to accumulate in a suction inlet of a lifting system and blocks pipe openings in deep sea mining.

The invention relates to a composite positioning system for a deep sea mining vehicle and a positioning method thereof. The composite positioning system comprises an active sonar, a passive sonar, aninertia sensing unit, a data processing unit and a mining vehicle main controller, wherein the active sonar, the inertia sensing unit, the data processing unit and the mining vehicle main controller are fixedly installed on a mining vehicle, and the passive sonar is fixed in water of a mining area; the inertia sensing unit is composed of a three-axis acceleration sensing module, accelerations of the mining vehicle in the X axis, the Y axis and the Z axis of a space coordinate system are collected in real time through the three-axis acceleration sensing module, and then the real-time position of the mining vehicle on the three coordinate axes are obtained through integral operation. The method has the advantages that the position of a mining vehicle is obtained in real time through the inertial navigation positioning method, the sonar positioning system is used for calibrating the position of the mining vehicle at intervals of a certain time period, and the problem that the inertial navigation system accumulates errors, and the distance between the sonar positioning system and the inertial navigation system is fuzzy is solved.

The present invention provides a distributed deep sea mining system. The distributed deep sea mining system comprises a central supporting platform floating on the water surface, a plurality of satellite mining lifting systems working below the water surface and a plurality of subsea mining collectors, wherein the central supporting platform and the satellite mining lifting systems are flexibly connected, each of the satellite mining lifting systems is connected with the subsea mining collectors, the central supporting platform coordinates the satellite mining lifting systems to combine and work together underwater, each of the satellite mining lifting system separately manages the multiple subsea mining collectors connected with each of the satellite mining lifting system to combine and work together, each of the subsea mining collectors transports collected ore to the central supporting platform through one satellite mining lifting system correspondingly connected with each of the subsea mining collectors. The distributed deep sea mining system realizes that a set of central supporting platforms supports the multiple sets of satellite mining lifting systems and the multiple mining collectors to operate simultaneously through the distributed cluster operation mode, and the operation efficiency is high; and the satellite mining lifting systems can work underwater and adapt to the bad sea conditions.

The invention discloses a skidding-state monitoring device can be used for a deep-sea mining vehicle, the deep-sea mining vehicle and a skidding monitoring method. The skidding-state monitoring device comprises a control device, a track speed measuring device and a speed measuring land wheel; the track speed measuring device is mounted on a track driving wheel of the deep-sea mining vehicle and connected with the control device through an underwater cable and a watertight connecting piece; the speed measuring land wheel is mounted at the tail of the deep-sea mining vehicle and is hinged through a shaft, and the speed measuring land wheel is used for measuring the running speed relative to the seabed ground of the deep-sea mining vehicle; and the speed measuring land wheel is connected with the control device through the underwater cable and the watertight connecting piece. According to the skidding-state monitoring device, the skidding state of the deep-sea mining vehicle can be judged, and corresponding treating measures can be given to solve the existing technical problem that the deep-sea mining vehicle cannot monitor and judge the skidding state.

The invention relates to a pipe-ship connection method suitable for deep-sea mining, and belongs to the field of deep-sea mining. A ball joint, a telescopic device and an adjustable short section forma pipe-ship connection device for compensating pipeline heave displacement and angular displacement produced by waves. A clamping plate is used as an underwater conveying system hanging and bearing body in the hard pipe lowering and elevating-conveying process. Through heave compensation systems, the impact on a water surface supporting platform due to a heavy load system heave motion impact loadunder the severe sea condition is reduced, an ore pulp is conveyed stably relatively, the fatigue damage and the dynamic compression risk of an underwater conveying system are retarded, and the overall operation safety is improved. A hydraulic control system provides a power source for the pipe-ship connection device. The pipe-ship connection method suitable for deep-sea mining provided by the invention solves the problem that heave compensation system hard pipes drift to touch a moon pool under the circumstance that the horizontal direction is unlimited; avoids the risks of butt-joint and configuration of an ore pulp conveying hose under a base platform and a test link; and has double safety guarantees, can realize quick switch and recovery under the emergency state, and provides convenience for offshore layout and recovery work.

The invention provides a multi-metal-nodule discontinuous chain bucket type deep sea mining system. The mining system comprises an overwater operation unit, an underwater chain bucket lifting unit, a seabed operation unit and an electrical control unit, wherein the overwater operation unit comprises an operation mother ship, a power platform and a transport ship with a plurality of chain wheels, and the operation mother ship, the power platform and the transport ship are arranged in a matched mode; the underwater chain bucket lifting unit comprises chain type ropes arranged on the chain wheels of the transport ship, chain buckets and sensors are arranged on the chain type ropes so as to monitor the stress condition of the chain type ropes, and seabed supports are further arranged at the bottoms of the chain type ropes; the seabed operation unit comprises a plurality of mining vehicles arranged on the seabed; and the electrical control unit comprises a charging pile and a controller, a monitoring unit and a communication unit are arranged in the controller, the monitoring unit is integrated on the charging pile, the communication unit comprises an underwater acoustic communication cable and a photoelectric composite cable, and the charging pile is electrically connected with the mining vehicles.

The invention relates to the technical field of deep-sea mining equipment, and particularly discloses a land slurry lifting experimental platform for deep-sea mining. The land slurry lifting experimental platform comprising a bin, and a material falling machine is arranged at the bottom of the bin. A descending conveying pipe and a lower connecting pipe are connected through a three-way valve I, the bin communicates with the descending conveying pipe through the three-way valve I in a bypass manner, and after being converged through a three-way valve II, the lower connecting pipe and an outletof the material falling machine are connected with a water bag. A water tank is connected with a water inlet of the bin and a water inlet of the water bag through a water feed pipe. The water bag isdivided into two paths after passing through a three-way valve III, the two paths communicate with an outlet of a vertical centrifugal pump and an inlet of a horizontal centrifugal pump, and the outlet of the vertical centrifugal pump and the inlet of the horizontal centrifugal pump communicate with an ascending conveying pipe after being converged through a three-way valve IV. A pressure stabilization water tank located at the high position is connected with the water bag through a pressure stabilization water pipe. By means of the experimental platform, a slurry lifting experiment of the circulating work condition / backpressure work condition can be carried out on the vertical centrifugal pump / horizontal centrifugal pump.

The invention discloses a deep sea mining method and a deep sea mining apparatus. According to the present invention, mining and ore dressing are integrated, wherein raw ore on the seabed is sucked into the raw mine bin of a ship by a sand sucking pump on the ship, impurities are separated with a vibrating sieve mesh, fine ore is selected with a magnetic separator and is directly conveyed to a transport ship through a screw conveyor and a belt conveyor, and the tailing is transported to the seabed away from the mining area through a tailing pump and is subjected to in-situ backfill; and the tailing treatment is simple, no adverse effect is caused on the environment, a lot of transporting capacity can be saved so as to reduce the mining cost, and the magnetic separator adopts the long strip structure, such that the raw ore can be subjected to complete and accurate ore dressing so as to effectively avoid the waste of resources.