56 results about "Manganese nodule" patented technology

The invention belongs to the field of water treatment in the environmental protection industry, and particularly relates to a method for preparing a novel composite adsorbing material for removing lithium ions in natural water. The composite adsorbing material is obtained by loading aluminum salt on a lithium ion screen modified by deep sea manganese nodules. According to the invention, the composite adsorbing material is obtained by the following steps of: preparing aluminum hydroxide and lithium hydroxide into aluminum salt, then, modifying the deep sea manganese nodules to obtain the lithium ion screen, combining aluminum slat and the lithium ion screen through a gelatinizing solvent, and finally, settling, washing, filtrating, centrifuging and air drying. The composite adsorbing material for removing the lithium ions in the natural water, provided by the invention, has the characteristics that the selective adsorption capacity on the lithium ions is efficient, the operation the simple, no secondary pollution is caused, recycling is realized, the price is low, and the like. The composite adsorbing material for removing the lithium ions in the natural water, provided by the invention, is simple in technology, low in cost, high in efficiency and beneficial for environmental protection, thereby having higher economic and social benefits in the field of water treatment.

The invention provides a method for treating ammonia nitrogen wastewater, which relates to a method for treating the ammonia nitrogen wastewater by using an adsorption method. The method is characterized in that in the treating process, a natural manganese mineral is used as an adsorbent to perform adsorption reaction with the ammonia nitrogen wastewater so as to remove the ammonia nitrogen in thewastewater. The natural manganese mineral is crushed into a manganese mineral adsorbent of 0-2 millimeters, the pH value of the wastewater containing the ammonia nitrogen is adjusted to be between 2and 12 by using acid or alkali, then the manganese mineral adsorbent contacts and is mixed with the ammonia nitrogen wastewater to perform adsorption, and the adsorption can be performed by adopting afixed bed adsorption column or in a stirring and mixing mode. When the fixed bed adsorption column is adopted for adsorption, the manganese mineral after being crushed is classified to remove fine particles for the best so as to improve the permeability of the adsorption column; and in the same way, when the stirring and mixing mode is adopted, the manganese mineral after being crushed is classified to remove coarse particles for the best so as to reduce the abrasion to equipment. The natural manganese mineral applicable to the method comprises a terrestrial manganese oxide mineral, an oceanpolymetallic nodule, an ocean cobalt-rich incrustation and a terrestrial manganese nodule, the natural manganese minerals usually contain manganese minerals of cryptomelane, todorokite, birnessite, vernadite, rancieite, pyrolusite and the like, have good pore structure and large specific surface area so as to have good adsorption property, and can be used as the adsorbent for treating the ammonianitrogen wastewater after being crushed into certain particle size, and the manganese minerals have the advantages of simple process, easy reproduction and stable performance.

Disclosed herein is a lifting pipe which is used in a manganese nodule mining system including a collection device for collecting deep-sea manganese nodules and a lifting pump and which has a structure in which dimples are formed on the surface of the lifting pipe so as to reduce drag so that the lifting pipe is less influenced by flows of ocean current. The dimpled lifting pipe includes dimples that are formed on the outer circumferential surface of the dimpled lifting pipe, so that turbulent flows are generated, thereby reducing drag caused by ocean currents of a deep sea.

The invention discloses a method for preparing a manganese sulfate solution through reducing roasting-leaching of manganese nodule. The method comprises the following steps of a, breaking the manganese nodule to obtain a product A; b, adding newly born carbon into the product A for mixing, obtaining a mixed ore, adding a sulfuric acid solution into the mixed ore for stirring, and obtaining a product B; c, adding water into the product B, evenly stirring, and obtaining a product C; d, feeding the product C into a roasting furnace to have a roasting reaction, and obtaining a product D; e, transferring the product D into a leaching tank, adding the sulfuric acid solution or waste electrolyte, adding water for adjusting the liquid solid mass ratio, performing a stirring reaction, and obtaininga product E; f, carrying out liquid and solid separation on the product E, and obtaining a manganese sulfate solution, wherein the manganese sulfate solution can be used for electrolytic manganese production and also can be used for preparing of a high purity manganese sulfate product. The method has the advantages of being simple in process equipment, low in treatment cost, low in investment running cost, and high in manganese recovery rate and providing reference for development use of the manganese nodule.

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 provides a method for preparing a nickel-cobalt-manganese ternary positive electrode material precursor by using manganese nodules. The method comprises the following steps: drying and crushing the manganese nodules, uniformly mixing the crushed manganese nodules with a reducing agent and a slag forming agent, and performing reducing and smelting to obtain a cobalt-nickel-copper-ironmolten alloy and slags; performing spray milling, enhanced leaching and solid-liquid separation on the molten alloy to obtain rust slags and a mixed solution of cobalt-nickel-copper-manganese; performing deep purification and impurity removal on the cobalt-nickel-copper-manganese mixed leach liquor to obtain a deeply purified cobalt-nickel-manganese mixed sulfuric acid solution; and finally deploying the molar ratio of cobalt, nickel and manganese in the cobalt-nickel-manganese mixed sulfuric acid solution according to target demands, throwing the cobalt-nickel-manganese mixed sulfuric acid solution into a reaction kettle together with sodium hydroxide and ammonia water, performing a synthetic reaction in a nitrogen protective atmosphere, and preforming ageing, filtering, washing and drying to obtain the nickel-cobalt-manganese ternary positive electrode material precursor. According to the method provided by the invention, the nickel-cobalt-manganese ternary positive electrode material precursor is directly prepared from the source of manganese nodules, and the purposes of maximizing the utilization rate of mineral resources, minimizing the energy consumption and minimizing the environmental burden are achieved.

The invention relates to a cadmium-lowering composite fertilizer and an application method thereof. The cadmium-lowering composite fertilizer comprises a deep applied fertilizer and a surface appliedfertilizer; the deep applied fertilizer and the surface applied fertilizer are separately one of the following fertilizers and are different from each other: a positive colloid fertilizer is used forgenerating positively charged colloid so that the electrical property of the surface of silty clay activated by chloride ion becomes positive from negative; and a negative colloid fertilizer is used for generating negatively charged colloid so that hydroxide which is passivated and contains cadmium heavy metal is combined to oxide to form iron-manganese nodules which are settled to the lower layerof soil. The invention provides a core idea of a cadmium-lowering technology, namely cadmium is forced not to be compatible to the soil, thus, a soil plough layer becomes a derichment layer from an enrichment layer, the cadmium can be automatically separated from the soil plough layer, and permeates into a subsoil layer along with permeation of the water, the problem of cadmium pollution of the soil is solved, a purpose of lowering the cadmium by using a fertilizer is achieved, the cost for fertilizer application is not increased, the cadmium is lowered to reach the standard fundamentally, and a purpose of seeking both temporary and permanent solutions is achieved. The cadmium-lowering composite fertilizer has the advantages of low cost and stable cadmium-lowering technology, production is maintained in a cadmium lowering process, and the cadmium-lowering composite fertilizer is easy to popularize.

A lifting pump for manganese nodules includes: a cylindrical body that is sealed at upper and lower portions thereof by a semi-spherical upper cap having a fluid outflow port and a cable insertion tube, and by a semi-spherical lower cap to which an inflow case of a pump unit is coupled; a pumping motor that has a fluid passage formed between an inner surface of the body and an outer surface thereof, is vertically fixed in the body, and drives the pump unit using electric power supplied through a cable; a cover that provides a seal around a shaft of the pumping motor; the pump unit that is installed between the shaft of the pumping motor and the semi-spherical lower cap, is driven by the rotation of the pumping motor, and lifts seawater together with the manganese nodules; a sealing means that provides a seal between the pumping motor and the pump unit; and a reducer that is coupled to the bottom of the pump unit and guides the seawater including the manganese nodules to the pump unit.

The invention relates to a method for selectively separating valuable metal in a cobalt-nickel-copper-iron alloy. The method for selectively separating the valuable metal in the cobalt-nickel-copper-iron alloy comprises the following steps of melting the cobalt-nickel-copper-iron alloy at the temperature ranging from 1300 DEG C to 1600 DEG C, atomizing for powdering through a high-pressure automation device, and obtaining cobalt-nickel-copper-iron alloy powder; adding the alloy powder into a sulfuric acid system, feeding an oxidizing gas or an oxidizing agent, regulating a gas flow or an oxidizing agent amount, and carrying out controlled electric potential selective leaching so as to obtain a Cu residue and a Co-Ni-Fe mixed leaching agent; further enhanced oxidizing leaching the Cu residue, and purifying to obtain a Cu chemical product; and adding the Co-Ni-Fe mixed leaching agent into a specially designed corrosion leaching tank, and carrying out corrosion separation so as to obtaina rust residue and a cobalt nickel sulfate mixed solution. The preparation method is novel, short in flow and non-pollution in technological process, can be used for extracting an ocean manganese nodule and recycling a lithium battery new energy material, and has a favorable industrialization prospect.

The invention relates to a method for extracting multiple metals from manganese nodule industrial residues, which adopts a series of chemical and physical methods to respectively extract manganese, nickel, cobalt and copper from the manganese nodule industrial residues and effectively recycles the four scarce metals of manganese, nickel, cobalt and copper. The invention not only solves the problems that the manganese, the nickel, the cobalt and the copper in the industrial residues pollutes the environment, destroys the ecology and endangers the health of the human body in an ion way and other problems, but also obtains the four scarce metals of manganese, nickel, cobalt and copper and preventing the loss of the four scarce metals.

Disclosed is a robot for mining a manganese nodule on a deep sea floor. The apparatus includes a plurality of moving apparatuses detachably disposed in parallel with each other; a mining apparatus installed to a front end of the moving apparatuses to mine a manganese nodule; a transferring apparatus installed to an upper portion of the moving apparatuses to crush the manganese nodule in a constant size or less such that the manganese nodule is transferred to an external; a power control measuring unit installed to an upper portion of the moving apparatuses for providing power to the moving apparatuses and controlling operations of the mining apparatus and the transferring apparatus; a structure frame for connecting the moving apparatuses to each other and for supporting the mining apparatus, the transferring apparatus and the power control measuring unit; and a buoyancy unit installed to a top end of the structure frame.

The invention discloses PRB filler for repairing Pb / Cd pollution and a preparation method and an effect verification method thereof. According to the water flow direction and the volume fraction, the filler contains 10% of quartz sand, 20% of dry straw or combined straw, 20% of coal ash-based zeolite, 20% of iron-manganese concretion, 20% of coal ash and 10% of quartz sand arranged in sequence. The PRB filler has a high removal rate for Pb / Cd combined pollution in underground water and has the advantages of being good in adsorption effect, low in cost and the like; the repair filler is mostly production waste and agricultural waste, so that waste utilization is achieved, cost is greatly saved, problems existing in the prior art are solved, and high economic benefits are obtained.

The invention discloses a deep-water manganese nodule collecting device. The device comprises a trailer, an air intake pipeline, a compression air pump and a hydraulic lifting pipeline, wherein one end of the air intake pipeline is connected with the compression air pump, and the other end of the air intake pipeline is connected with the trailer through a first valve; one end of the hydraulic lifting pipeline is connected with the trailer through a second valve, the other end of the hydraulic lifting pipeline extends into a mother ship, and a pump and centrifugal pumps are installed in the hydraulic lifting pipeline; the trailer comprises a trailer cavity, a mud cleaning and crushing component, a front shovel, telescopic rods, a rolling gate and a waterproof rubber die sleeve; the trailercavity is provided with an opening, the rolling gate is mounted on the upper edge of the opening of the trailer cavity, the trailing edge of the front shovel is connected with the lower edge of the opening of the trailer cavity, and the front shovel can rotate around the trailing edge of the front shovel; one ends of the telescopic rods are connected with the other end of the front shovel, and theother ends of the telescopic rods are connected with the rolling gate; the waterproof rubber die sleeve is installed on the inner wall of the opening of the trailer; and the mud cleaning and crushingcomponent is fixed in the trailer cavity through a ball hinge, and check valves are arranged on the trailer cavity. According to the deep-water manganese nodule collecting device, the working efficiency of a mining device is improved, the cost is low, the structure is simple, and construction and maintenance are facilitated.

The invention provides a method for preparing agricultural goods through chelating ferromanganese nodule sand by lignin. The agricultural goods prepared with the method are bird-eating health sand, feed additive, trace element fertilizer and soil conditioner. The preparation method comprises the following steps: secondary ferromanganese nodule sand is soaked in solution containing the lignin, or the secondary iron-manganese nodule sand after acidification is soaked therein, or the soaked materials are further neutralized. The method adopts the solution and industrial waste acid containing the lignin to be acted with the ferromanganese nodule sand which is discarded by people for a long term, thus leading the ferromanganese nodule sand to have utilization value to serve for the human society; the preparation process is non-slag production; the feed additive prepared has weight-increasing effect on livestocks and has the effects of improving the soil and fertility as a micro-fertilizer, thus being a measure to achieve recycling agriculture and ecological regression; and compared with similar products, the prepared agricultural goods have lower price.

The invention relates to a fluctuant piston energy exchange device and comprises: a high level reservoir for receiving and energy exchange which is formed on the sea; a collecting energy system unit which is arranged under the reservoir and comprises a set of piston barrel arranged into the sea and embedded piston body, with a rim pipe arranged above the piston barrel and running through the piston barrel, a floating ball on the sea level covered on the piston barrel and the rim pipe, a non-return check valve arranged in the rim pipe, and a water intake forcing check valve arranged on the piston body; and more than one level of resistance baffleplates arranged at the lower end of the piston body. The floating ball and the piston barrel are two assemblies which are in nonrigid connection; the length of fit of the piston barrel arranged in the sea area and the embedded piston body is more than the maximum wave height in the sea area. The invention can transform the regenerative wave energy into effective mechanical energy, and can be directly applied to power generation, factories building at sea, seawater desalination and hydrogen production and manganese nodule exploration.

An apparatus for bi-directionally mining a manganese nodule includes a traveling device to travel in a predetermined traveling direction, collecting devices installed at both ends of the traveling device, respectively, to collect the manganese nodule, and a control device to sense the traveling direction of the traveling device and to drive one of the collecting devices installed at both ends of the traveling device, which is placed in the sensed traveling direction.

The invention discloses a novel application of manganese nodule and a preparation method of a layered intercalated ferrite composite material. The preparation method comprises the following steps of firstly, using oceanic manganese nodule primary ore as raw materials, and using a strong oxidizing agent, persulfate and other reagents to process to synthesize a manganese nodule layered minerals; performing organic modification on the synthesized layered minerals to prepare modified layered minerals; uniformly mixing a ferrite precursor and an alcohol substances to prepare slurry, and mixing themodified layered minerals with the slurry, enabling the ferrite precursor to be introduced between the layered minerals, and performing hydrolysis and calcining to obtain the layered intercalated ferrite composite material. According to the method disclosed by the invention, by utilizing the interlayer confinement effect of the manganese nodule layered minerals, the grain diameter of the ferrite is reduced, the agglomeration of the nano-particles is inhibited, and the exposed crystal face characteristics of the intercalated ferrite are changed. Compared with the nano ferrite, the composite material has the advantages of lower cost and better adsorption, photolysis and electromagnetic performance, and has a wide application prospect in the fields of wastewater treatment, photocatalysis, electromagnetic adsorption and the like.

The preparation process of spiral carbon nanotube includes the following steps: 1) crushing manganese nodule mineral from sea bed and ultrasonic cleaning in clear water to eliminate dirt; 2) ball milling the manganese nodule mineral and sieving to obtain 200-mesh powder to be used as catalyst; and 3) setting the catalyst inside quartz boat, maintaining at 700-850 deg.c in nitrogen atmosphere for at least 20 min, and introducing acetylene gas to produce catalytic cracking reaction for at least 15 min to prepare spiral carbon nanotube. The present invention is simple and low in cost, and can provide spiral carbon nanotube or research and application.

The invention provides a preparation method and application of tar-based carbon quantum dots, particularly relates to application of the tar-based carbon quantum dots to rapid evaluation of metal ionsin leaching liquid systems of deep-sea mineral resources, namely ocean manganese nodules and cobalt-rich crusts, and belongs to the field of carbon nanomaterial preparation technologies and application. According to the preparation method, the tar-based carbon quantum dots are firstly prepared. The tar-based carbon quantum dots serve as a fluorescent probe and have a selective fluorescence quenching effect with copper and iron ions in polymetallic and high-concentration ion leaching liquid of the oceanic manganese nodules and the cobalt-rich crusts under ultraviolet light stimulation, and thelinear relationship between the concentrations of Cu2+ and Fe3+ and fluorescence quenching can be obtained without pretreatment of the leaching liquid, so that the concentrations of Cu2+ and Fe3+ arecalculated. According to the method, leaching of copper, manganese, cobalt, nickel and iron in the high-concentration and polymetallic leaching system of the oceanic manganese nodules and the cobalt-rich crusts can be quickly evaluated, the capability of resisting to non-target detection ion interference is high, selectivity and sensitive are high, the detection concentration is wide, the cost islow, environmental protection is achieved, a process is simple, and operation is convenient and fast.

The invention relates to a method for jointly adsorbing lead / chlorpyrifos in a water body by activated loess iron-manganese nodule. The method comprises steps of firstly, picking residual root and stalk of plants and the like out from loess of a dry farmland by manual work, repeatedly washing a soil sample with pure water for three times, sieving so as to obtain loess iron-manganese nodule with grain size greater than 40 meshes; secondly, grinding the iron-manganese nodule till the grain size is 0.1+ / -0.02mm, throwing into a conical flask with a stopper, under the conditions of stirring assisted by ultrasonic (120+ / -5rpm) and heating in water bath (80+ / -5DEG C), soaking and activating by a FeCl3 solution, leaching and stoving the activated product (at 40+ / -5DEG C); jointly adsorbing a lead / chlorpyrifos combined pollutant in the water body by taking the activated loess iron-manganese nodule as an adsorbent; and after saturation of adsorption, desorbing by pure water under the condition of stirring assisted by ultrasonic, inspecting the cyclic utilization potential of the activated loess iron-manganese nodule. The method has low cost, is simple and convenient to operate, has strong practicability and good safety, and has good application potential in adsorbing and purifying heavy metal / pesticide composite pollutant in the water body.

The preparation process of spiral carbon nanotube includes the following steps: 1) crushing manganese nodule mineral from sea bed and ultrasonic cleaning in clear water to eliminate dirt; 2) ball milling the manganese nodule mineral and sieving to obtain 200-mesh powder to be used as catalyst; and 3) setting the catalyst inside quartz boat, maintaining at 700-850 deg.c in nitrogen atmosphere for at least 20 min, and introducing acetylene gas to produce catalytic cracking reaction for at least 15 min to prepare spiral carbon nanotube. The present invention is simple and low in cost, and can provide spiral carbon nanotube or research and application.

The invention provides a method for screening silicate bacteria from a manganese nodule. The method comprises the following steps that a manganese nodule sample is weighed, added into sterilized distilled water and scattered evenly, and the turbid liquid with the concentration of 0.05-0.2 g / mL is obtained; the obtained turbid liquid is diluted step by step and sprayed on a plate, and the plate coated with turbid liquid is reversely cultivated in a constant-temperature cultivation box; a typical bacterial colony is selected from obtained bacterial colonies and placed on a culture medium for lineation and continuous cultivation, and the typical bacterial colony is a transparent or semitransparent and bacterial colony semi-glass-bead protruding bacterial colony which is not prone to being lifted or being drawn after being lifted; the culture medium is a nitrogen-free solid selective culture medium; the processing process of the steps is repeatedly executed till the bacterial colony is purified. The method has the advantages of being high in efficiency, easy to operate, reliable in result and the like, and the working efficiency of screening microorganisms from minerals can be improved.

The present invention relates to a leaching method of rare-earth metals using a hydrochloric acid from a manganese nodule, and more particularly, to a leaching method of rare-earth metals using a hydrochloric acid from a manganese nodule, in which a manganese nodule is mixed with a hydrochloric acid, then stirred and heated to leach the rare-earth metal included in the manganese nodule.

The invention provides a method for preparing agricultural goods through chelating ferromanganese nodule sand by lignin. The agricultural goods prepared with the method are bird-eating health sand, feed additive, trace element fertilizer and soil conditioner. The preparation method comprises the following steps: secondary ferromanganese nodule sand is soaked in solution containing the lignin, or the secondary iron-manganese nodule sand after acidification is soaked therein, or the soaked materials are further neutralized. The method adopts the solution and industrial waste acid containing the lignin to be acted with the ferromanganese nodule sand which is discarded by people for a long term, thus leading the ferromanganese nodule sand to have utilization value to serve for the human society; the preparation process is non-slag production; the feed additive prepared has weight-increasing effect on livestocks and has the effects of improving the soil and fertility as a micro-fertilizer, thus being a measure to achieve recycling agriculture and ecological regression; and compared with similar products, the prepared agricultural goods have lower price.

The invention discloses an undersea mining machine which is a manganese nodule collecting shovel, wherein the manganese nodule collecting shovel is integrally formed by combining a frame main beam, a scraper bucket, relieving teeth, a central stirring shaft, an anti-sinking plate, an anti-sinking sledge, a front end traction tie and a rear end traction tie through welding, fastener connecting and other modes; a hoist on a mining dredger supplies power to the collecting shovel via cable wires so that the collecting shovel can continuously mine on a undersea surface with the bearing capacity less than 7 kpa, and can collect the manganese nodule with the grain diameter greater than 20mm. The cable wires can drive stirring shaft blades in the scraper bucket to clockwise and counterclockwise rotate back and forth; and the sediment is filtered through gaps of the scraper bucket. After the shovel finishes collecting, the cable wires lift the collecting shovel from the sea level, opens a side door and the scraper bucket inclines a certain degree so that the manganese nodule mine is poured in the mining carrying vehicle on a dredger. Under the collecting conditions of 5-7 kg / m<2> abundance ratio of the manganese nodule mine, taking depth of water 6000m as an example, the time of the single shovel mining is 1.5 hours (comprising auxiliary time), the weight of the mine is 200 tons, and the service life is more than 10 years.

The invention discloses new application of a manganese nodule and a preparation method of a layered insertion-layer magnetic metal composite material. The preparation method comprises the steps of firstly, taking oceanic manganese nodule raw ore as a material, and processing the material by a reagent such as a strong oxidization agent and persulfate to synthesize a manganese nodule layered mineral; secondly, performing organic modification on the synthesized layered mineral to prepare a modified layered mineral; and finally, jointly stirring a magnetic metal microparticle salt and the manganese nodule layered mineral to form an insertion-layer compound, and reducing with a strong reduction agent so that the magnetic metal microparticle salt is reduced among layers to form nanometer magnetic metal particles, wherein the obtained product is the layered mineral and nanometer magnetic metal microparticle insertion-layer composite material. By an interlayer range-limitation effect of the manganese nodule layered mineral, the agglomeration of the nanoparticles is effectively prevented; compared with the magnetic metal microparticle, the prepared composite material is relatively low in cost, has better catalytic and electromagnetic performance, is a multi-functional and excellent environmental-friendly material and has wide application prospect in the field of a wave absorption coating, a catalyst and the like.