JP2021123884A - Recovery device and recovery method for selectively recovering solids from liquids - Google Patents

Abstract

To avoid the use of pollutants such as surfactants used in mineral processing operations, and reduce the generation of waste due to mineral processing residues.SOLUTION: A recovery device that selectively recovers solids (minerals) to be recovered in liquid comprises a bubble generator that bubbles a positively or negatively charged gas and applies the bubbles to a solid to be recovered that is charged with a polarity different from that of the gas.SELECTED DRAWING: Figure 1

Description

The present invention relates to a recovery device and a recovery method for selectively recovering a solid substance from a liquid.

For example, in the case of mud containing rare earth in the deep sea, a pump lift method in which high-lift multi-stage slurry pumps are connected in series at multiple locations for recovery, or an air lift that injects high-pressure air from an air compressor on board into several locations in each deep layer. It is being considered to raise rare earth together with mud on the seabed by a method or the like.
In addition, separation of cesium-adsorbed clay minerals (bentonite, montmorillonite, bakelite, etc.) is being studied as clay minerals.
Furthermore, in mine beneficiation, a large amount of replenishing agent such as zansate is used, which poses a problem of environmental load.

Japanese Patent Application Laid-Open No. 2019-078018

For rare earths in the deep sea, it is desired to recover rare earth elements such as dysprosium (Dy) in seafloor sediments without contamination.
In other words, since the use of marine pollutants such as surfactants (mainly organic substances) is unavoidable in the current mainstream mineral processing technology, rare earth deposits containing minerals to be sorted and removed from the seabed are pulled up to the ground together with apatite. There was a need to beneficiate on the ground (on the ocean). In addition, since the mineral processing residue cannot be returned to the sea, waste is generated, which causes an increase in cost.
Therefore, it is desired to avoid the use of pollutants such as surfactants used in the mineral processing work and reduce the generation of waste due to the mineral processing residue.
In addition, in clay minerals, mine beneficiation, waste treatment plants, etc., there is a demand for beneficiation that takes into consideration the technology that enables proper separation and the environment that does not use replenishers such as zansate.

In order to solve the above problems, the recovery device for selectively recovering the solid to be recovered (mineral) in the liquid according to claim 1 of the present invention foams a positively or negatively charged gas into bubbles. A bubble generator for applying the bubbles to the solid to be recovered, which is charged with a polarity different from that of the gas, is provided.

The recovery device according to claim 2 is characterized in that the bubbles are applied to the solid to be recovered by water pressure from the bubble generator.

The recovery device according to claim 3 is provided with an ion generator that generates a positively or negatively charged gas.

The recovery device according to claim 4 is characterized by comprising a container in which a gas previously charged positively or negatively is sealed at a pressure higher than atmospheric pressure.

The recovery device according to claim 5 is further characterized in that the gas is recovered and reused.

The recovery device according to claim 6 is characterized in that the gas is negatively charged and the solid to be recovered is a rare earth element.

The cesium recovery method according to claim 7 is a first step in which the gas is positively charged and the solid to be recovered is a clay mineral (cesium-adsorbed clay) in the recovery device, and the above-mentioned selection and recovery in the first step. It is characterized by including an intermediate step of destroying clay minerals, and a second step of negatively charging the gas and using cesium as the solid to be recovered in the recovery device or other recovery device.

The recovery method for selectively recovering the solid to be recovered in the liquid according to claim 8 is different from the gas by forming a positively or negatively charged gas and foaming the gas. It has a step of applying the bubbles to a polarly charged solid to be recovered (mineral).

Since the present invention enables selective mining of rare earth by mineral processing technology on the seabed without containing any additives that cause marine pollution, it is not necessary to lift apatite and rare metal as a unit, and the energy required for resource mining can be obtained. Reduction (because only the target material is transported to the ground in the manner of flotation) and treatment of mineral processing residue waste (there is a rule that secondary generated residues cannot be returned to the ocean and waste treatment is required) are no longer required, and the seabed It will dramatically lower the hurdles for resource development.
In addition, it is possible to reduce energy by eliminating the need to send air from the ship to the seabed, and to investigate, search, and recover deeper seabeds.
Also, in clay mineral and mine beneficiation, it is possible to perform beneficiation in consideration of the technology that can be appropriately separated and the environment that does not use a replenishing agent such as zansate.

It is the schematic of the recovery device which concerns on this embodiment. It is the schematic of the recovery device which concerns on 1st Embodiment. It is explanatory drawing of the collection part of the recovery apparatus which concerns on 1st Embodiment. It is explanatory drawing of the shipboard part of the recovery device which concerns on 1st Embodiment. It is explanatory drawing of the collection part of the recovery apparatus which concerns on 2nd Embodiment. It is explanatory drawing of the shipboard part of the recovery device which concerns on 2nd Embodiment. It is explanatory drawing of the collection part of the recovery apparatus which concerns on 3rd Embodiment. It is explanatory drawing of the recovery apparatus which concerns on 3rd Embodiment. It is explanatory drawing of the shipboard part of the recovery device which concerns on 3rd Embodiment.

Hereinafter, the recovery device and the recovery method according to the present embodiment will be described. However, the present invention is not limited to each of the following embodiments, and any combination may be used, and any conventional corresponding technique can be used.
In addition, the "minerals" to be recovered in the present embodiment include all metallic cation elements (for example, scandium) handled in rare earth mining, existing mines, factories, waste treatment plants, nuclear power plants, households, etc. (Sc), yttrium (Y), lantern (La), cerium (Ce), placeozim (Pr), neodym (Nd), gadrinium (Gd), terbium (Tb), dysprosium (Dy), holmium (Ho), erbium (Er), thulium (Tm), lutetium (Lu), strontium (Sr), cesium (Cs), cobalt (Co) or iodine (I), etc.), including any one or a combination of two or more. be able to. In particular, among these, it is preferable to have a hexagonal (No. 194) crystal structure in which the surface characteristics can be positively charged like fine ice and toner in thunderclouds if the surroundings are covered with gas. In addition, in this embodiment, "mineral processing" means to separate the minerals to be recovered and the minerals not to be recovered in this embodiment.

Further, in the present embodiment, the “solid matter to be recovered in the liquid” means, for example, “rare earth in the sea” in the case of rare earth beneficiation in the deep sea, and is used for beneficiation in factories, waste treatment plants and mines. In the case, it means that there is a substance containing a liquid such as water and a solid substance to be recovered before beneficiation in a water tank, a river or a pond.

FIG. 1 is a schematic view of a recovery device according to the present embodiment.
As shown in FIG. 1, the recovery device includes an ion generator 1 and a bubble generator 2. Further, in the present embodiment, the bubble generator 2 is arranged in the liquid.

The liquid in this embodiment is a liquid mainly composed of naturally occurring water (H2O) such as river, lake, dam, swamp or pond water, tap water, groundwater, rainwater or seawater (including 50% or more of the volume). However, a mixture of two or more of these liquids and other liquids can also be the target of the liquid of the present embodiment.

Further, the gas in the present embodiment means a gas mainly composed of air (including 50% or more of the volume) in principle, but the gas in the present embodiment is not limited to air. Any gas that is negatively or positively charged can be the gas of the present invention.

The ion generator 1 takes in outside air from the gas inlet 7, generates a positively or negatively charged gas, and is connected to the bubble generator 2 through the ventilation pipe 8 together with the liquid sucked from the liquid suction port 17 by the pump P. This gas is sent to. That is, the gas is sent to the bubble generator 2 in a state of being mixed with the liquid. The bubble generator 2 makes the sent gas into bubbles and hits the solid to be recovered in the liquid. Here, since the recovery target solid is charged with a polarity different from that of this gas, the ionized gas adheres to the recovery target solid, which causes buoyancy in the recovery target solid, and the mineral collection hopper It is collected on the base plate 11 located above the. The collected solid to be recovered is absorbed by the solid-liquid separation device 3 through the absorption pipe 9, and the solid to be recovered and the liquid are separated by the solid-liquid separation device 3, so that the solid to be recovered can be recovered. It will be possible.

Here, when the solid to be recovered is in the deep sea, when the solid to be recovered with gas (for example, rare earth) rises in the absorption tube 9, when the pressure of the tube is open, the volume of bubbles (bubbles) is It is thought that it expands more than 100 times the seabed, but in that case, the charging effect is reduced and the solid to be recovered cannot be retained.
However, since a strong updraft is generated in the absorption pipe 9, it is possible to lift the solid matter to be collected to the ship.
Further, by making the absorption tube 9 a closed tube and controlling the pressure inside the tube, it is possible to control the expansion amount of the bubble.
For the absorption of the solid-liquid separation device 3, not only the buoyancy due to such a gas but also the power of a suction pump or the like may be used.
Further, when the solid to be collected is in shallow water such as a water tank or a river in a factory, a waste treatment plant, a nuclear power plant, a mine, etc. on the ground, the pump P or the liquid suction port 17 may not be provided. That is, the positively or negatively charged gas may be sent to the bubble generator 2 without being mixed with the liquid.
Further, the gas or the like does not necessarily have to be sent by the pump P, and may be provided with a configuration (for example, power of a pump or the like) for sending the gas or the like to the ion generator or the bubble generator.

Further, for the separation of the solid to be recovered and the liquid, a technique generally used for separation can be used, for example, using a fine mesh through which the liquid passes and the solid to be recovered does not pass.
Here, when the liquid is recovered together with the solid to be recovered, the liquid can be returned to the original liquid from the liquid discharge port 4. By using this recovery device in this way, it is possible to selectively recover only the solids to be recovered while keeping the substances other than the solids to be recovered in their original places.

In addition, it is desirable to apply bubbles from the bubble generator to the solid to be recovered by water pressure.
With this configuration, even if the solid to be recovered is attached to the non-recovery target, the solid to be recovered can be peeled off from the non-recovery target and appropriately separated.

In this embodiment, the bubbles are applied by "water pressure", but the bubbles may be applied by "pressure by a liquid other than water".
The water pressure is preferably 0.1 MPa to 100 MPa.
At a pressure within this range, even if the solid to be recovered is attached to the non-recovery target, the solid to be recovered can be peeled off from the non-recovery target and separated appropriately.
If the pressure is less than 0.1 MPa, it cannot be separated properly and the recovery rate drops, or if the water depth is deep, it loses the water pressure and cannot send out air.
In addition, if the pressure exceeds 100 MPa, other than the solid matter to be recovered will be peeled off, so that the bottom of the water will be damaged or destroyed more than necessary, which will cause contamination of the bottom of the water.
Further, the water pressure is preferably 0.01 × X (unit: MPa) or more when the water depth is X (unit: m). If it is below this range, air cannot be properly sent out in water.

In particular, it is desirable that the bubble generator is equipped with a bubbling jet device. The bubbling jet device may be one that self-sucks gas due to the Venturi effect accompanying a change in the flow velocity of the liquid, or one that forcibly supplies gas by a pump. Moreover, as a method of making a gas into a large number of bubbles, a method of mechanically stirring a liquid and a method of shearing a gas by a liquid flow can be mentioned. Specifically, as the bubbling jet device, a known device such as a bubbling jet nozzle or an ejector can be used.

The amount of gas in the bubbling jet jet (ratio of the volume at room temperature to atmospheric pressure to the volume of the liquid) is preferably, for example, 1 NL / L or more and 5 NL / L or less. The average diameter of bubbles in the bubbling jet jet is preferably 0.1 nm or more and 5 mm or less, and more preferably 1 nm or more and 1 μm or less. Further, the water pressure of the liquid is preferably 0.2 MPa or more, and the flow velocity of the bubbling jet jet is preferably 0.5 m / s or more, more preferably 1.0 m / s or more at the discharge port of the bubbling jet nozzle, for example. ..

The bubble generator in the present embodiment may not be provided with such a bubbling jet device, and may have a configuration in which gas is simply blown out from the ventilation tube.

If the solid matter to be collected is firmly attached to the object not to be collected or is present inside, the bubbling jet device may peel off the solid substance to be collected from the object not to be collected. It may not be possible to take it out. In that case, it is desirable to use means for destroying these solids, for example, known means such as pliers, hammers, and explosives. The present embodiment may include a configuration in which such a destructive means is executed by remote control.

For example, when the solids to be recovered are rare earths in the deep sea, the technique used is negative ion bubble flotation. The nozzle size may be larger than that on the ground because the pressure in the deep sea changes depending on the depth of the seafloor, the layers of apatite are several microns, and the pressure in the deep sea makes bubbles smaller. However, it is necessary to prevent the nozzle from causing pressure loss and preventing air from being sent.

Here, the 001 plane (crystal surface) of the apatite crystal (hexagonal-dipyramidal) has a structure dominated by OH (negative charge), and has the property of adsorbing cations by a weak intermolecular bond force (Van der Waals force, etc.). It is confirmed that rare earths (positive) are concentrated and adsorbed on the ocean floor.
This structure is the opposite of that of ice crystals (hexagonal-dipyramidal) in which H (positive charge) controls the 001 plane.

For the separation of apatite crystals with concentrated rare earths and rare earth minerals, the rare earths are separated from the apatite surface by contacting with negative ion bubbles that are stronger than the negative (negative) charge on the surface of the apatite crystals, and adhere to the surface of the negative ion bubbles. It can be collected. In this respect, it is desirable that the binding force due to the negative ion bubble is stronger than that due to the van der Waals force of apatite. Moreover, since the surface of apatite is charged with a negative charge, a repulsive force is generated from the negative ion bubble and the apatite does not adhere to the negative bubble. As a result, only rare earths, which are the objects to be recovered, can be selectively recovered on the seabed. The negative ion bubble means a negatively charged bubble-like gas.

Apatite is a plate-like mineral and has a positively charged region in the layered area in the apatite (because the surface is negative and the central surface is positive), and the strongest repulsive force (normal distribution) is generated near the center of the crystal. Therefore, rare earths are attached to the surrounding area.
That is, since the rare earth is attached to the position where the bubbles (bubbles) are likely to come into contact, the situation is such that the bubbles are easily combined with the bubbles.
Therefore, it is sufficient that the bubbles can come into contact with the periphery of the apatite crystal, and the bubble size does not have to be at the nano level.

The main constituents of rare earths are neodymium (Nd) and dysprosium (Dy), and their crystal structures are No. 194, which is the same as ice (ice) and graphite, which is preferable for the practice of the present invention. Is.

In addition, the solid-liquid separator has a function of separating rare earths and seawater and returning only the seawater to the ocean.
As a result, only the rare earths that are the objects to be recovered can be selectively recovered while the substances other than the rare earths that are not the objects to be recovered are kept in their original places.

In addition, cesium is trapped between layers (nm order) of swelling clay minerals, and it is possible to destroy and peel off the cesium to adsorb and recover only cesium. Since cesium is positively charged, when negative ion bubbles are used, cesium is adsorbed on the bubbles, and the 001 surface (crystal surface) of the swellable clay mineral is negatively charged because it is dominated by OH (negative charge). As a result, cesium can be selectively adsorbed.

Further, in order to remove substances other than the solid substance to be recovered when absorbed by the solid-liquid separator, it is desirable to provide a fine mesh inside the base plate, the absorption tube and the solid-liquid separator.
With this configuration, it is possible to prevent the entrainment of destroyed apatite crystals when recovering rare earths, and to prevent the entrainment of destroyed clay minerals when recovering cesium.

<First Embodiment>
FIG. 2 is a schematic view of the recovery device according to the first embodiment, and the collection portion of the recovery device is shown in FIG. 3 and the onboard portion is shown in FIG.
In the first embodiment, as shown in FIG. 2, the ion generator 1 and the solid-liquid separation device 3 are mounted on the ship S, and the ore collection hopper 10 including the bubble generator 2 and the like is submerged in water. be. Here, the ion generator 1 and the solid-liquid separation device 3 are connected to the bubble generator 2 and the ore collection hopper 10 by the ventilation pipe 8 and the absorption pipe 9, respectively, as in FIG.
Here, the ventilation pipe 8 is fed in a state where gas and liquid are mixed by the above-mentioned pump P (see FIG. 1 because it is not shown in FIG. 2), or a conventional pump lift system (multi-stage pump). , It may be configured by an air lift method, but it is not limited to these. Any configuration may be used as long as it has the ability to send a positively or negatively charged gas until it reaches the bottom of the liquid (water) (for example, the bottom of the ocean). In this respect, the second embodiment described later is also the same.

Further, the concentrator hopper 10 is connected to the ship S by a cable 14, and is configured so that the concentrator hopper 10 can be lowered into the water or raised from the water by the cable 14.
Here, it is desirable that the cable 14 has a function of transmitting a power supply, a control signal, or the like for controlling the screw 13 or the camera 12, or includes a cable or the like having such a function.
Further, the position control of the collection hopper 10 can be performed by remotely controlling the screw 13 and the like in FIG. 3 from the ground.
Similarly, the camera 12 can be remotely controlled from the ground to collect information and work at the time of position control.
Although the camera 12 is provided with a lighting device (not shown), the lighting device does not necessarily have to be provided integrally with the camera, and may be provided in, for example, the bubble generating device 2.
Further, as shown in FIG. 4, on the ship S, there is a pulling device 15 corresponding to each of the cable 14, the ventilation pipe 8 and the absorption pipe 9, and the ventilation pipe 8 and the absorption pipe 9 are the ion generator 1 and the solid, respectively. It is connected to the liquid separation device 3.

<Second embodiment>
The recovery device according to the second embodiment integrates the ventilation pipe 8 and the absorption pipe 9 in the first embodiment.
Regarding the cross-sectional shape that intersects in the direction perpendicular to the long axis direction of this integrated pipe, the ventilation pipe 8 is arranged so as to surround the absorption pipe 9 in a donut shape, or the ventilation pipe 8 is surrounded by a donut shape. It is desirable to arrange the absorption tube 9 so as to surround it.
The collection part of the recovery device according to the second embodiment is shown in FIG. 5, and the onboard part is shown in FIG.
As shown in FIG. 5, since the ventilation pipe 8 and the absorption pipe 9 are integrated, the work is easy and the configuration is simple. Further, as shown in FIG. 6, the number of pulling devices 15 can be reduced.

<Third embodiment>
In the recovery device according to the third embodiment, the ion generator 1 and the solid-liquid separation device 3 in the first embodiment are installed not on the ship S but in water as shown in 16 of FIGS. In the third embodiment, it is installed above the collection hopper 10. The collection part of the recovery device according to the third embodiment is shown in FIGS. 7 and 8, and the onboard part is shown in FIG.
Note that FIG. 8 shows the details of the locations of the ion generator 1 and the solid-liquid separation device 3 in FIG. 7.
Here, the container (air cylinder or the like) A is filled with a gas that has been positively or negatively charged by the ion generator 1 or another ion generator in advance at sea or the like at a pressure higher than the atmospheric pressure.

The container A containing the gas is, for example, a spherical pressure-resistant cylinder, and it is desirable that the container A has a function of releasing the gas near the seabed. That is, the internal pressure of the cylinder is high at the time of pressurization, and the pressure is applied outward at a shallow depth, but the pressure is rather inward at the deep sea bottom. ), Then the external pressure gradually increases. Since the pressure resistance of this cylinder can be charged to the deep sea floor, for example, if high-pressure air is sealed in a container of Shinkai 6500 (registered trademark), the principle is that it can dive deeper than the filling pressure balance depth by 6,500 m. In principle, it may be possible to dive to the depth of the Mariana Trench (10911m).

Further, as shown in FIGS. 7 and 8, most of the ventilation pipe 8 and the absorption pipe 9 are unnecessary, so that the work is easy and the configuration is simple. Further, as shown in FIG. 9, only one pulling device 15 can be used.
Further, the solid-liquid separation device 3 can circulate and reuse the gas by recovering the positively or negatively charged gas and injecting it into the ion generator 1 through the gas discharge port 6. ..

That is, by using the configuration of the present invention, it is possible to dive into the ultra-deep sea, and by circulating the gas used for beneficiation at the beneficiation site on the seabed, it is not necessary to bother to send it from the ground to the seabed, and energy. Can be reduced.

In the third embodiment, the container is filled with a positively or negatively charged gas at a pressure higher than the atmospheric pressure, but the present invention is not limited to such a form. For example, an uncharged gas may be sealed in the container, or the gas may be filled at the same pressure as the atmospheric pressure.
Further, in the third embodiment, the ion generator 1 is provided, but the present invention is not limited to such an embodiment. For example, the present invention can include a configuration excluding the ion generator 1.

<Fourth Embodiment>
The recovery device according to the fourth embodiment (not shown) is the one without the cable 14 in the third embodiment. By doing so, the lifting device 15 can be eliminated on the ship.
In this case, the recovery device can be wirelessly controlled from the outside by, for example, a float with an antenna provided on the water.
Further, by configuring the recovery device so that it can be controlled independently by AI (artificial intelligence) or the like provided inside the recovery device, the work by humans can be significantly reduced.
By using a storage battery, private power generation, or the like inside the recovery device, the power supply from the outside can be eliminated.

<Fifth Embodiment>
The fifth embodiment shows an outline of a technique for recovering cesium from cesium-adsorbed clay using a charged ion bubble to which the present invention is applied. This technique consists of two steps (first step and second step) and an intermediate step, which will be described later. Each process will be described below.

First step:
This is a process of selectively extracting clay minerals (cesium-adsorbed clay) from contaminated soil.
Due to the positive ion bubble (positively charged bubbled gas) in the configuration of the present invention, the adsorption of negative charges due to the OH control of the 001 surface (crystal surface) of the swelling clay mineral is utilized to make gravel (bubbles). Separates clay minerals (adhering to bubbles) and clay minerals (adhering to bubbles). It creates a situation where gravel does not adhere but clay minerals adhere.

Intermediate process:
A mesh classification step is provided after the first step, and an intermediate step is provided in which organic substances such as trees and leaves floating in a large size are separated and only clay minerals are recovered. This intermediate step is a step performed because the air bubbles that float when performed in a series of steps (during flotation) are defective due to the inclusion of these miscellaneous substances on the mesh.

Second step:
This is a step of destructively washing the clay mineral (cesium-adsorbed clay) sorted and recovered in the first step to recover only cesium.
Clay minerals are crushed by a powerful negative ion bubble jet (registered trademark) or the like in the configuration of the present invention, and a swellable clay interlayer staying plus charged substance is attached to and floated on the bubbles to recover cesiums. It is desirable that the amount of negative ion bubble charge used here exceeds the negative charge due to the OH control of the 001 surface (crystal surface) of the swellable clay mineral. Interlayer positive charges (aluminum, sodium, potassium, etc.) other than cesium are also contaminated, but separation in a wet process is easy by utilizing the difference in electronegativity with cesium.

<Sixth Embodiment>
The sixth embodiment is a configuration (device) in which, in principle, a survey or search is performed without collecting the data in the third or fourth embodiment.
In this case, since the configuration related to collection is not required, the configuration may be such that the necessary devices, sensors, etc. are simply added to the container (air cylinder, etc.) A. Further, the container A is pre-filled with a gas (in this case, it does not have to be a charged gas) at sea or the like at a pressure higher than the atmospheric pressure. The device, sensor, etc. may be provided inside or outside the container A, but must be configured to withstand pressure and changes in pressure during use.

Similar to the third embodiment, the container A may be, for example, a spherical pressure-resistant cylinder, or may have a function of releasing gas near the seabed. In this case, it is possible to recover by providing a configuration (for example, a bubble generator, a concentrator hopper, etc.) related to the recovery of each of the above-described embodiments. The internal pressure of the cylinder is high when pressurized, and the pressure is applied outward at shallow depths, but the pressure is rather inward at the deep sea floor, so the internal pressure of the cylinder is high up to a certain depth, and the balance depth (internal / external pressure difference is zero). ), Then the external pressure gradually increases. Since the pressure resistance of this cylinder can be charged to the deep sea floor, for example, if high-pressure air is sealed in a container of Shinkai 6500 (registered trademark), the principle is that it can dive deeper than the filling pressure balance depth by 6,500 m. In principle, it may be possible to dive to the depth of the Mariana Trench (10911m).

That is, by using the configuration of the sixth embodiment, it is possible to dive into the ultra-deep sea, investigate, and search.
In addition, it is preferable to pre-fill the gas at a pressure exceeding 10 atm on the sea or the like so that it can be investigated and searched at a water depth of about 200 meters, which is close to the upper limit of human dive, and further filled at a pressure exceeding 50 atm. By doing so, it becomes possible to investigate and search beyond the deep sea (water depth of about 1000 m) where visible light does not reach, which is more preferable.
Further, as a device, for example, by mounting a camera device, it is possible to capture and record an image of the deep sea. It is desirable that a lighting device is provided.

1 Ion generator 2 Bubble generator 3 Solid-liquid separator 4 Liquid discharge port 5 Solids discharge port to be collected 6 Gas discharge port 7 Gas injection port 8 Ventilation pipe 9 Absorption pipe 10 Concentration hopper 11 Base plate 12 Camera 13 Screw 14 Cable 15 Winding device 16 Integrated ion generator and solid-liquid separation device 17 Liquid suction port

S Ship W Underwater E Underwater O Solids to be recovered B Solids to be recovered Container A Container (air cylinder, etc.)
P pump

Claims (8)

In a recovery device that selectively recovers solids (minerals) to be recovered in a liquid
A bubble generator, in which a positively or negatively charged gas is bubbled and the bubbles are applied to the solid to be recovered, which is charged with a polarity different from that of the gas.
Recovery device equipped with. The recovery device according to claim 1, wherein the bubbles are applied to the solid to be recovered by water pressure from the bubble generator. The recovery device according to claim 1 or 2, further comprising an ion generator that generates a positively or negatively charged gas. The recovery device according to any one of claims 1 to 3, further comprising a container in which a gas previously charged positively or negatively is sealed at a pressure higher than atmospheric pressure. The recovery device according to any one of claims 1 to 4, further comprising recovering and reusing the gas. The recovery device according to any one of claims 1 to 5, wherein the gas is negatively charged and the solid to be recovered is a rare earth. In the recovery apparatus according to any one of claims 1 to 5, the first step of positively charging the gas and using the solid to be recovered as a clay mineral (cesium-adsorbed clay), and the first step of sorting and recovering. In the intermediate step of destroying the clay mineral and the recovery device or the other recovery device according to any one of claims 1 to 5, the gas is negatively charged and the solid to be recovered is cesium. A method for recovering cesium, which comprises a second step. The process of producing a positively or negatively charged gas and
A step of bubble-forming the gas and applying the bubbles to a solid to be recovered (mineral) charged with a polarity different from that of the gas.
A recovery method for selectively recovering a solid substance to be recovered in a liquid having.

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