344 results about "Cobalt hydroxide" patented technology

The invention discloses a method for synchronously improving the recovery rate of copper and cobalt in high-oxidation-rate copper-cobalt ore and low-grade copper oxide-cobalt concentrate, which comprises the following steps: (1) carrying out copper sulfide flotation on the high-oxidation-rate copper-cobalt ore to obtain high-copper tailings; (2) the low-grade copper-cobalt concentrate and the high-copper tailings are mixed according to the mass ratio of 1: (1-2), and mixed ore is obtained; (3) the obtained mixed ore and a sulfuric acid solution system leaching agent are stirred and mixed, and slurry is obtained; (4) leaching the obtained slurry at normal temperature, and carrying out solid-liquid separation to obtain leached residues and leached liquid; (5) carrying out washing, extraction, reverse extraction and electrodeposition on the obtained leaching residues to obtain metal copper; and removing iron from the raffinate, and adding magnesium oxide into the iron-removed liquid for precipitation to obtain crude cobalt hydroxide. According to the method, the high-copper tailings and the low-grade copper oxide cobalt concentrate are subjected to the processes of ore blending, size mixing, normal-temperature sulfuric acid leaching and the like, the final copper leaching rate is 95% or above, and the cobalt leaching rate is 70% or above.

The invention provides a method for precipitating nickel and cobalt in a solution containing nickel and cobalt and a cobalt nickel hydroxide product. The method comprises the following steps: step S100, carrying out a seed crystal pretreatment reaction on a nickel-cobalt-containing solution by adopting first nickel-cobalt precipitation underflow to form pretreated nickel-cobalt ore pulp; step S200, adding an alkaline precipitation inducer into the second nickel-cobalt precipitation underflow or the first nickel-cobalt precipitation overflow to carry out alkali conversion reaction to form alkali conversion crystal mush; s300, the pretreated nickel-cobalt ore pulp and alkali conversion crystal mush are continuously introduced into a reactor for a nickel-cobalt precipitation reaction, and nickel-cobalt precipitated ore pulp is obtained; step S400, continuously performing dense separation treatment on the ore pulp subjected to nickel-cobalt precipitation; s500, the third nickel-cobalt precipitation underflow is filtered and washed in sequence, a nickel-cobalt hydroxide product is obtained, and the problems that in the prior art, when nickel and cobalt are precipitated through a nickel-cobalt-containing solution, MHP is small in particle size and not prone to sedimentation, the water content of a filter cake is high, or the precipitation rate is poor, and the magnesium content is high before technical improvement are solved.

The present application provides a method for recovering aluminum and scandium. The method comprises the following steps: providing iron-aluminum residue generated in a leaching process for lateritic nickel ore; performing alkaline leaching, involving subjecting the iron-aluminum residue to atmospheric or pressure leaching by using an alkaline leaching agent, followed by separation and washing, so as to obtain scandium-containing residue, an aluminum-containing first filtrate and an aluminum-containing first washing liquid; and preparing an aluminum product. In the present application, a nickel-cobalt hydroxide product is produced from lateritic nickel ore by means of a hydrometallurgical process, and the iron-aluminum residue, as a raw material, is subjected to leaching using an alkaline leaching agent, solid-liquid separation, and washing. The leaching residue is washed to obtain scandium-containing residue, which can be used as a high-quality scandium smelting raw material; and the aluminum-containing first filtrate and aluminum-containing first washing liquid are treated by using the procedure of the Bayer process to obtain an aluminum hydroxide or aluminum oxide product. The present application achieves resource recovery and utilization of associated valuable metals, i.e., aluminum and scandium, without affecting the production of a major valuable metal product in a hydrometallurgical process of lateritic nickel ore.

The invention relates to the technical field of hydrometallurgy, in particular to a method for selectively leaching and separating cobalt and manganese from crude cobalt hydroxide leaching residues. The separation method provided by the invention comprises the following steps: S1, pre-reduction treatment; and S3, cobalt is leached through selective oxidation, and manganese is precipitated. According to the separation method, the synergistic effect of ORP and pH is regulated and controlled, proper reducing agents and oxidizing agents are selected, cobalt is selectively leached through step-by-step oxidation, dissolution of manganese is inhibited, manganese circularly entering a leaching and extraction system is reduced, the leaching and extraction operation cost is reduced, meanwhile, a selective complexing agent is introduced, impurity co-dissolution is reduced, the subsequent purification process is simplified, and the method is suitable for industrial production. The preparation method is simple to operate and easy for industrial production, and has a good application prospect.

The invention provides an improved treatment method for laterite-nickel ore. The improved treatment method comprises the following steps: S1, carrying out acid leaching on the laterite-nickel ore, and then filtering and washing to obtain a leached solution and first leached residues; step S2, the step S2 is selected from any one of a step S2-1, a step S2-2 and a step S2-3; s3, performing first-stage nickel and cobalt precipitation and dense filtration on the aluminum and scandium removed liquid or the iron and aluminum removed liquid by adopting a precipitator to obtain first-stage nickel and cobalt precipitation liquid and a nickel cobalt hydroxide product; and S4, carrying out second-stage nickel-cobalt precipitation on the first-stage nickel-cobalt precipitation solution by adopting a nickel-cobalt precipitation neutralizer and an oxidizing agent to obtain a magnesium sulfate manganese solution and nickel-cobalt-manganese slurry. In the traditional process, ferrous iron is oxidized by using compressed air, so that energy is wasted. According to the method, the manganese-containing substance is adopted as the oxidizing agent, ferrous iron is oxidized into ferric iron, the problems that the ferrous iron is low in oxidation rate under the low pH and compressed air is wasted are solved, and the scandium recovery rate is increased.

The invention discloses a preparation and application method of active magnesium oxide for cobalt precipitation, which comprises the following steps: adding acetate during preparation of an active magnesium oxide precursor magnesium hydroxide to obtain magnesium hydroxide with a double-tooth structure; when magnesium oxide is prepared through calcination, conversion from magnesium hydroxide to magnesium oxide can be achieved at a low temperature, and meanwhile high activity is obtained; and finally, the magnesium oxide slurry is added into the cobalt precipitation pre-solution for cobalt precipitation, the cobalt precipitation effect is good, and the obtained coarse cobalt hydroxide cobalt is high in grade. The magnesium hydroxide regulating agent is used for promoting generation of magnesium oxide rich in active sites, the magnesium hydroxide regulating agent is applied to the wet metallurgy cobalt deposition process, the cobalt deposition effect of active magnesium oxide prepared through a chemical method is effectively improved, other methods except for the method for reducing the particle size and promoting the activity of magnesium oxide are developed, acetate is selected as the magnesium hydroxide regulating agent, the dosage is small, and the cost is low. Magnesium oxide obtained through calcination is high in purity, the cobalt deposition process is not affected, unit consumption of magnesium oxide can be reduced, and cost is saved.

The invention discloses a foamed nickel loaded cobalt sulfide / nickel sulfide NF-CoS / NiS. The foamed nickel loaded cobalt sulfide / nickel sulfide NF-CoS / NiS is prepared by the following steps: firstly, taking foamed nickel NF as a substrate, loading cobalt hydroxide on the surface of the NF through first electrodeposition, then converting the NF into ZIF-67 through an impregnation method, then vulcanizing through thioacetamide and hydrothermal reaction, and finally loading Ni3S2 nanoparticles through second electrodeposition. The nickel foam loaded cobalt sulfide / nickel sulfide NF-CoS / NiS can be obtained. The preparation method comprises the following steps: 1, preparing foamed nickel electro-deposition cobalt hydroxide; 2, preparation of the foamed nickel loaded cobalt hydroxide / ZIF-67; 3, cobalt hydroxide / cobalt sulfide NF-Co / CoS is loaded on the foamed nickel; and 4, preparation of the foamed nickel loaded cobalt sulfide / nickel sulfide NF-CoSX / Ni3S2. When the material is used as a supercapacitor material, charging and discharging are carried out in a voltage window range of 0-0.5 V, and when the current density is 1mA cm <-2 >, the area specific capacitance is 8-9F cm <-2 >; and when the current density is 10mA cm <-2 >, 70-80% of the initial capacity is still kept after 5000 charge-discharge cycles are carried out.

The invention discloses an ultrahigh-nickel polycrystalline composite ternary positive electrode material as well as a preparation method and application thereof, and belongs to the technical field of lithium batteries. The ultrahigh-nickel polycrystalline composite ternary positive electrode material comprises a modified material, the modified material is a sintered product prepared from an ultrahigh-nickel polycrystalline ternary positive electrode material precursor subjected to oxidation sintering treatment, a lithium source and an MXene material, and the modified material is sequentially coated with cobaltous hydroxide and a coating agent trimethoxy (1H, 1H, 2H, 2H)-1, 2, 3, 4-tetramethyl-1, 3-pentanediol monoisobutyrate. And the water-resistant layer is formed by (2H, 2H-heptadecafluorodecyl) silane. According to the ultrahigh-nickel ternary positive electrode material provided by the invention, the MXene material is directly combined with the ternary positive electrode material at a high temperature to form a tight interface structure, so that the structural stability of secondary spherical particles is enhanced, cracks are reduced, and the stability and electrochemical performance of the material are improved; the cobalt hydroxide and the water-resistant material trimethoxy (1H, 1H, 2H, 2H-heptadecafluorodecyl) silane are used for coating, so that the contact between the material and H2O and CO2 in the air is reduced, the residual alkali is reduced, and the production and storage of the material are facilitated.

The invention relates to a preparation method and application of a hollow nanorod array oxygen evolution electrode, and belongs to the field of hydrogen production by alkaline electrolysis of water. The self-supporting nickel-iron double-metal hydroxide nanosheet coated cobalt hydroxide hollow nanorod array oxygen evolution electrode is obtained through a continuous electro-deposition method; foamed nickel is used as a substrate, and catalytic active components loaded on the substrate are cobalt hydroxide and ferro-nickel double-metal hydroxide; a hollow nanorod structure vertically grows on the surface of the foamed nickel substrate, and the hollow nanorod structure comprises a hollow nanorod-shaped cobalt hydroxide layer located in the hollow nanorod structure and a plurality of layers of nickel-iron double-metal hydroxide nanosheets wrapping the surface of the hollow nanorod-shaped cobalt hydroxide layer; the diameter of the hollow nanorod is 0.2-1 micron, and the length of the hollow nanorod is 2-3 The electrode provided by the invention has unique morphology and good oxygen evolution catalytic activity.

The invention discloses a method for comprehensively recovering metal from nickel-cobalt hydroxide containing scandium, copper and manganese. The method comprises the following steps: carrying out acid leaching on nickel-cobalt hydroxide containing scandium, copper and manganese to obtain nickel-cobalt leachate containing scandium and copper and manganese-containing leaching residues, and precipitating scandium and copper in the nickel-cobalt leachate containing scandium and copper by adjusting the pH value to obtain precipitation residues I containing scandium and copper and nickel-cobalt purified liquid; and returning the precipitation slag I containing scandium and copper to the acid leaching process until the concentration of scandium in the nickel-cobalt leaching solution containing scandium and copper is not lower than 1.5 g / L and / or the concentration of copper is not lower than 7.5 g / L, and respectively recovering scandium and copper in the nickel-cobalt leaching solution containing scandium and copper through extraction separation, the raffinate I obtained in the scandium extraction and separation process is directly returned to the acid leaching process or is continuously subjected to copper extraction and separation; and adjusting the pH value of raffinate II obtained in the copper extraction separation process to precipitate residual scandium and copper, and returning obtained precipitation slag II containing scandium and copper to the acid leaching process. According to the method, the recovery rate of scandium, copper, manganese, nickel and cobalt can be remarkably increased, and the comprehensive utilization rate of the laterite-nickel ore is increased.

The application discloses a composite precipitant for wet refining of laterite nickel ore and a wet refining method of laterite nickel ore. The composite precipitant for wet refining of laterite nickel ore is composed of a mixture of magnesium oxide and sodium hydroxide, and the mass fraction of sodium hydroxide in the composite precipitant is greater than 0 and less than or equal to 99%. The wet refining method of laterite nickel ore comprises the following steps: directly or after being grinded, the composite precipitant is added into an acidic solution to be refined, and stirring is performed to make the composite precipitant fully react with the acidic solution to be refined; after concentration, a clear liquid and a solid-containing slurry are obtained; the solid-containing slurry is filtered and washed with water to obtain a solid containing nickel hydroxide, cobalt hydroxide or nickel hydroxide-cobalt hydroxide, so that nickel, cobalt or nickel-cobalt is precipitated. The composite precipitant and the wet refining method of laterite nickel ore have the advantages of simple process, low cost, easy process control, easy settlement and filtration of nickel hydroxide (and cobalt hydroxide) precipitation, and the production efficiency can be significantly improved and the energy consumption can be reduced.

The invention provides a cobalt-based catalyst, a preparation method thereof and application of the cobalt-based catalyst in electrolytic hydrogen production. Specifically, the cobalt-based catalyst mainly comprises a nano cobalt oxide and a nano cobalt hydroxide, and is prepared by taking KCo (III) EDTA as a precursor through an electrochemical deposition method. The preparation method of the cobalt-based catalyst comprises the following steps: firstly, dissolving KCo (III) EDTA (Ethylene Diamine Tetraacetic Acid) in an alkaline solution to form cobalt-containing alkaline liquor; performing electrochemical deposition, and performing in-situ deposition on the surface of the electrode to form a cobalt-based catalyst; the preparation method is simple, convenient, easy to control, good in reproducibility, capable of forming high binding force with an electrode without fixing of an additional binder, good in stability, not prone to falling off and beneficial to industrial application as a catalyst for hydrogen production through water electrolysis. The cobalt-based catalyst is applied to a water electrolysis hydrogen production catalyst, and the cobalt-based catalyst has an obvious oxygen evolution reaction as an anode catalyst.

The invention relates to the technical field of drying, in particular to a flash evaporation drying device for cobalt hydroxide production, which comprises a drying cylinder, fan blades, a ceramic ring and a first-stage separation assembly, a drying cavity is formed in the drying cylinder, the fan blades are rotatably arranged at the lower part of the drying cavity, and the fan blades can rotate around the axis of the fan blades; and the ceramic ring is arranged at the upper part of the drying cavity and used for driving the air in the drying cavity to spirally move from bottom to top. The first-stage separation assembly is arranged, materials which are not discharged out of the drying cavity through the pottery ring can fall into the first vortex disc, the materials with different particle sizes are adaptively crushed in the first vortex disc, so that the particle uniformity of the materials entering the drying cavity again from the first vortex disc is improved, and in addition, the larger the particle size of the materials is, the larger the particle size of the materials is, the larger the particle size of the materials is. And the retention time of the materials in the first-stage separation assembly is longer, so that the temperature uniformity of the materials is also improved.

The invention provides an iridium / cobaltosic oxide mesoporous monocrystal oxygen evolution catalyst and a preparation method thereof, and relates to the technical field of catalyst preparation, and the preparation method comprises the following steps: S1, preparing a mesoporous monocrystal cobalt hydroxide sheet; s2, dispersing mesoporous monocrystal cobalt hydroxide and an iridium-containing compound in an ethanol-water mixed solution, heating to a certain temperature, stirring to react for a period of time, and then washing and drying a reaction product; and S3, roasting the dried reaction product in an air atmosphere for a period of time to obtain the catalyst. The catalyst disclosed by the invention has high Ir load, extremely low overpotential and ultrahigh stability, and has huge potential in practical application of electrolyzed water.

The invention relates to the technical field of batteries, in particular to a surface-modified positive electrode material and a surface modification method thereof. The positive electrode material surface modification method provided by the invention comprises the following steps: S1, mixing a cobalt source with an organic solvent to obtain an intermediate, and depositing the intermediate on a graphite sheet by adopting a chemical deposition method to obtain a coating material; and S2, mixing the positive electrode material with the coating material obtained in the step S1, and calcining to obtain the surface-modified positive electrode material. According to the invention, the cobalt source is deposited on the graphite flake through a chemical deposition method to form the graphite flake of which the surface is uniformly coated with cobalt hydroxide, so that not only can the stability of the coating material structure be improved, but also the electrochemical activity of cobalt hydroxide in the coating material can be further improved; the graphite flake with cobalt hydroxide deposited on the surface is used as a coating material to be sintered with the positive electrode material, so that the obtained surface-modified positive electrode material is good in structural stability and high in specific capacity, and the cycle retention rate of the battery can be improved.

A cobalt-coated sodium ion battery precursor, and a preparation method and use therefor. The cobalt-coated sodium ion battery precursor sequentially comprises, from inside to outside, a core, a transition layer and an outer coating layer. The core comprises a nickel-iron-manganese precursor material. The transition layer comprises a nickel-iron-manganese-cobalt precursor material. The coating layer comprises a cobalt hydroxide material. By carrying out gradient coating of cobalt on the nickel-iron-manganese core, cobalt is sequentially increased from inside to outside, such that the surface structure stability of the nickel-iron-manganese precursor is improved, side reaction between the electrode and the electrolyte is inhibited, and the use voltage and rate capability of the sodium-ion battery are effectively improved.

The invention relates to a battery material preparation technology, in particular to a method for preparing high-purity cobaltous sulfate from crude cobaltous hydroxide, which comprises the following steps: S1, reacting the crude cobaltous hydroxide with sulfuric acid to generate magnesium sulfate; s2, washing to remove magnesium; s3, adding sulfuric acid and hydrogen peroxide into the crude cobalt hydroxide after magnesium washing; adding crude cobalt hydroxide to adjust the pH value to obtain a purified solution; s4, adding sodium fluoride into the purified liquid, and filtering after reaction to obtain filtrate; s5, saponifying with sodium hydroxide by using an acidic extractant, then performing soap conversion by using a cobalt sulfate solution, extracting manganese in the filtrate by using an obtained organic phase, and then performing reverse extraction on the organic phase by using sulfuric acid to obtain a manganese sulfate solution; s6, the raffinate obtained after manganese extraction is introduced into an adsorption tower loaded with a zirconium-based composite fluorine adsorbent; and S7, concentrating and crystallizing the defluorinated solution. According to the method, the zirconium-based composite fluorine adsorbent is introduced to be coupled with the process, fluorine ions can be removed, and cobalt loss caused by cobalt fluoride precipitation and the influence of the fluorine ions on the quality of a cobalt sulfate product are avoided.

The present disclosure belongs to the field of batteries, and particularly relates to cobalt hydroxide and a preparation method therefor, a positive electrode material, a battery and electrical equipment. Provided in the present disclosure is cobalt hydroxide, the particles of which are in the shape of a sheet and have an average thickness of 10-20 nm. The cobalt hydroxide of the present disclosure is nanosheets having an extremely small average thickness and a larger surface area, which can thus improve the coating effect thereof on a positive electrode material, thereby effectively inhibiting the formation of a nickel oxide rock salt-like phase in the positive electrode material, reducing the concentration of residual lithium on the surface of the positive electrode material and enabling lithium ions to be quickly deintercalated / intercalated; therefore, the electrical properties of the positive electrode material prepared therefrom can be significantly improved.

The invention provides a method for improving main components in a cobalt nickel hydroxide intermediate product. The lifting method comprises the following steps: step S100, carrying out first activation on cobalt nickel hydroxide intermediate product slurry by adopting an alkaline substance to obtain first activated product slurry; step S200, adjusting the solid content of the first activated product slurry; s300, activating the first activated product slurry for the second time by adopting a reducing agent to obtain second activated product slurry; step S400, adjusting the solid content of the second activated product slurry; and step S500, adding the second activated product slurry into a nickel-cobalt-containing solution for conversion reaction to obtain nickel cobalt hydroxide and a converted solution. According to the method disclosed by the invention, the total content of nickel and cobalt in cobalt nickel hydroxide can be remarkably increased and reaches a level exceeding 50%. The problems that the content of impurities such as magnesium and manganese in the nickel cobalt hydroxide intermediate product is too high, the content of sulfate radicals is too high, and consequently the subsequent refining production cost is increased are solved.

The invention provides a doubling treatment method of battery black powder and nickel cobalt hydroxide. The doubling treatment method comprises the following steps: carrying out reduction roasting and water immersion treatment on the battery black powder to obtain a first lithium-containing liquid and a solid product; carrying out acid leaching on the solid product to obtain a leaching solution; after removing impurities from the leachate, extracting the leachate with a first saponification extraction agent to obtain first raffinate and a first extraction organic phase; carrying out soap conversion reaction on the first raffinate and a second saponification extraction agent to obtain a second extracted and soap-converted organic phase and a second lithium-containing liquid; carrying out acid leaching and impurity removal on nickel cobalt hydroxide, and carrying out extraction reaction on the solution and the second extraction soap-converted organic phase to obtain a second extraction organic phase and a second raffinate; the second raffinate is subjected to Co extraction, Mg extraction and evaporative crystallization, and nickel sulfate is obtained; and the organic phase obtained after Co extraction is subjected to back extraction and evaporative crystallization, and cobalt sulfate is obtained. Compared with a traditional doubling treatment technology, the doubling treatment method avoids the problem of impurity pollution caused by doubling treatment of traditional battery black powder and nickel cobalt hydroxide raw materials.

The utility model relates to the technical field of drying and energy saving, and particularly discloses a cobalt nickel hydroxide or cobalt hydroxide drying system based on waste heat steam utilization, which comprises a mixing device, a steam rotary drying device, a dust removal device and a spray washing device which are connected in sequence, steam in the upstream flash evaporation process is subjected to deacidification treatment and then is introduced into a heat exchange tube bundle of the steam rotary drying device to serve as a heat source; the discharging end of the steam rotary drying device is respectively connected with a discharging branch and a material returning loop through a discharging screw; the material returning loop is connected to one feeding hole of the material mixing device, and the other feeding hole of the material mixing device is connected with a nickel cobalt hydroxide or cobalt hydroxide wet material conveying device. An indirect heat exchange mode is adopted, only a small amount of hot air is needed to serve as moisture-carrying gas, the tail gas amount is greatly reduced, meanwhile, damage to materials caused by direct contact with high-temperature hot air in a traditional drying mode is avoided, the physical property of the materials can be kept, and the particle size and quality of products are improved.

The invention relates to a low-cobalt-salt adhesion promoter and a preparation method thereof, and relates to the technical field of rubber adhesives, the low-cobalt-salt adhesion promoter is of a core-shell structure and comprises, by mass, 10-15 parts of core metal precursor powder, 15-20 parts of a shell SiO2 shell layer and 5-8 parts of long-chain alkylsilane grafted to the surface of the SiO2 shell layer; the metal precursor powder comprises cobalt hydroxide, manganese hydroxide and ferric hydroxide, and the molar ratio of the cobalt hydroxide to the manganese hydroxide to the ferric hydroxide is 1: (2-3): (1-1.5). According to the invention, the dispersibility of the low-cobalt salt adhesion promoter and the compatibility with rubber can be effectively improved.

The invention discloses a method for preparing a high-pressure leachate and a method for preparing nickel cobalt hydroxide, and the method comprises the following steps: carrying out high-pressure acid leaching treatment on reduced laterite-nickel ore pulp to obtain the high-pressure leachate, mixing the reduced laterite-nickel ore pulp with an oxidizing agent before the high-pressure acid leaching treatment, and / or adding the high-pressure leachate to the reducing laterite-nickel ore pulp to obtain the high-pressure leachate, the oxidizing agent is added in the high-pressure acid leaching treatment process. The method is simple in production process, and the smelting cost of the reduced laterite-nickel ore is reduced.

The invention relates to a preparation method and application of a single-crystal or single-crystal-like ultrahigh-nickel lithium ion battery ternary positive electrode material, and the preparation method comprises the following steps: step 1, dispersing and uniformly mixing a cobalt-nickel-manganese hydroxide ternary precursor, a lithium source and a metal oxide serving as columnar metal ions to obtain a premixed material; carrying out primary sintering on the premixed material, sieving, dispersing and washing to obtain a primary sintering product; 2, urea phosphate and N-methyl pyrrolidone NMP are fully mixed to prepare an in-situ wet coating agent, the primary sintering product and the in-situ wet coating agent are evenly mixed, and then suction filtration, presintering drying and sieving are conducted to obtain a presintering product; and carrying out secondary sintering and secondary sieving dispersion on the pre-sintered product to obtain the single-crystal or single-crystal-like ultrahigh-nickel ternary positive electrode material for the lithium ion battery. The problems of poor structural stability and poor electrochemical performance of a single-crystal or single-crystal-like ultrahigh-nickel lithium ion battery ternary positive electrode material under high voltage in the existing scheme are solved.

The invention relates to the technical field of metal recovery, in particular to a method for recovering metal from coarse nickel cobalt hydroxide. The method for recycling the metal from the coarse nickel cobalt hydroxide comprises the following steps that S1, after the coarse nickel cobalt hydroxide is subjected to ammonia complexing leaching and oxidation in sequence, leachate and manganese slag are obtained; s2, after the leachate is separated through an extraction method, raffinate, a nickel-containing solution and a copper-containing solution are obtained; s3, the raffinate is subjected to ammonia distillation treatment, and cobalt-zinc slag is obtained; s4, the cobalt-zinc slag is subjected to acid leaching, and a zinc-containing solution and cobalt slag are obtained; and S5, the cobalt slag is subjected to reduction leaching, and a cobalt-containing solution is obtained. According to the method for recovering the metal from the crude nickel cobalt hydroxide, the metal in the crude nickel cobalt hydroxide can be fully extracted, and a nickel product, a cobalt product, a copper product, a zinc product and manganese slag which can be sold as a manganese smelting raw material are obtained.

The invention provides a treatment method of nickel-cobalt hydroxide, which comprises the following steps of: leaching the nickel-cobalt hydroxide by using a leaching agent containing ionic liquid and chloride, and filtering to obtain leachate and leaching residues; adding iron powder or manganese powder into the leachate to remove copper, and filtering to obtain copper sponge and copper-removed liquid; adding an alkaline regulator into the copper-removed liquid, and filtering to obtain iron and aluminum-removed liquid and iron and aluminum slag; carrying out counter-current extraction on the iron and aluminum removed liquid and P204 to obtain manganese-rich organic liquid and manganese extraction residual liquid; carrying out reverse extraction on the manganese-rich organic liquid with dilute sulfuric acid to obtain a manganese sulfate solution, wherein the manganese sulfate solution is used for preparing a ternary precursor or manganous-manganic oxide; carrying out countercurrent extraction on the manganese extraction raffinate and the co-extraction organic solvent to obtain a nickel-cobalt-loaded organic solvent and raffinate; carrying out reverse extraction on the nickel-cobalt-loaded organic solvent by dilute sulfuric acid to obtain a nickel-cobalt sulfate solution; the nickel-cobalt sulfate solution is used for preparing the ternary precursor after being deoiled. The nickel-cobalt hydroxide treatment method provided by the invention is low in auxiliary material consumption, low in treatment cost, green and environment-friendly.

The invention relates to the technical field of positive electrode precursors, in particular to a method for preparing a sulfate solution for a precursor by using a cobalt nickel hydroxide intermediate product and application of the sulfate solution. Performing acid leaching on the intermediate product, and then adding a flocculating agent to obtain a cobalt-nickel-manganese mixed solution and manganese slag; extracting the cobalt-nickel-manganese mixed solution and P507-C272, and reversely extracting a loaded organic phase to obtain a crude manganese sulfate solution; performing P204 impurity removal on the raffinate, recovering cobalt by using P507 to obtain a cobalt sulfate solution, and performing C272 nickel-magnesium separation to obtain a nickel sulfate solution; manganese slag is subjected to reduction leaching to obtain reduction leaching liquid, and then the reduction leaching liquid is mixed with a sodium carbonate solution to remove iron to obtain iron-removed liquid; mixing the iron-removed solution with the crude manganese sulfate solution, and removing calcium and magnesium to obtain a calcium-magnesium-removed solution; mixing the calcium and magnesium removed solution with an aluminum source to remove fluorine to obtain a fluorine removed solution; and mixing the fluorine-removed solution with sulfide to remove copper and zinc, adding alkali liquor to obtain a heavy-removed solution, and treating the heavy-removed solution with modified resin to obtain a refined manganese sulfate solution. The method is high in manganese recovery rate and low in treatment cost.

The invention discloses a foamed nickel-based composite material based on an electro-deposition / hydrothermal synthesis method, which is characterized in that firstly, foamed nickel NF is used as a substrate, cobalt hydroxide is loaded on the surface of the NF through electro-deposition, and Co (OH) 2 / NF with a lamellar stacked flower-shaped structure is obtained; the preparation method comprises the following steps: preparing NiCo-LDH (layered double hydroxide) Co (OH) 2 / NF, then converting the NiCo-LDH (layered double hydroxide) Co (OH) 2 / NF into ZIF-67 through an impregnation method to obtain ZIF-67 (at) Co (OH) 2 / NF with a regular dodecahedron structure, and finally, preparing NiCo-LDH (at) Co (OH) 2 / NF with a honeycomb stacked structure through a hydrothermal method. The preparation method comprises the following steps: 1, preparing foamed nickel electro-deposition cobalt hydroxide; 2, preparing the foamed nickel loaded ZIF67 and cobalt hydroxide; and 3, preparing the nickel foam loaded nickel-cobalt layered double-metal hydroxide and cobalt hydroxide. When the material is used as a supercapacitor material, the area specific capacitance is 17-18F cm <-2 > when the current density is 1mA cm <-2 >; and when the current density is 10mAcm <-2 >, 70-80% of the initial capacity is still kept after 5000 charge-discharge cycles are carried out.

The present invention provides a method for improving the main components in a nickel-cobalt hydroxide intermediate product. The improvement method comprises: step S100, using an alkaline substance to perform a first activation on the nickel-cobalt hydroxide intermediate product slurry to obtain a first activated product slurry; step S200, adjusting the solid content of the first activated product slurry; step S300, using a reducing agent to perform a second activation on the first activated product slurry to obtain a second activated product slurry; step S400, adjusting the solid content of the second activated product slurry; step S500, adding the second activated product slurry to a nickel-cobalt solution for conversion reaction to obtain nickel-cobalt hydroxide and a converted liquid. The method of the present invention can significantly increase the total content of nickel and cobalt in nickel-cobalt hydroxide to a level of more than 50%. It solves the problem of high impurity content of magnesium, manganese and the like in the nickel-cobalt hydroxide intermediate product, high sulfate content, and the resulting increase in subsequent refining production costs.

This invention discloses a method for preparing a tufted nickel-cobalt hydroxide nanomaterial modified electrode material. The tufted nickel-cobalt hydroxide is prepared on carbon paper using a constant potential method. The electrolyte is a solution of nickel sulfate and cobalt sulfate. The specific operation is as follows: S1. Carbon paper pretreatment; S2. Electrode preparation is a solution containing nickel sulfate and cobalt sulfate; S3. Electrode preparation finally obtains the tufted electrode material.