22 results about "Nickel Protoxide" patented technology

The invention discloses a method for recovering platinum and palladium from high-cobalt nickel-containing carbonylation slag, and relates to the technical field of non-ferrous metal carbonylation metallurgy, the method comprises the following steps: S1, hydrogen reduction and activation; s2, feeding into a high-pressure carbonylation reactor; and S3, efficient carbonylation. According to the method, the carbonylation slag is subjected to hydrogen reduction activation treatment, nickel protoxide and cobalt oxide are changed into simple substance nickel, the simple substance nickel is fed into a carbonylation reactor for carbonylation under the protection of reducing gas or inert gas after activation treatment, 95% of Ni, 85% of Fe and 80% of Co are carbonylated to enter a gas phase after carbonylation, bonding of cobalt and a platinum solid solution is broken through carbonylation, and the nickel-cobalt-cobalt-cobalt-cobalt alloy is obtained. Nickel protoxide is difficult to dissolve in various strong acids and oxidizing acids, and a foundation is laid for further separation of base metals and non-metallic element sulfur from precious metals to produce high-grade platinum concentrate.

The invention discloses a preparation method of a nickel-boron intermediate alloy for a nickel-based superalloy, which comprises the following steps: step 1, mixing boric anhydride powder and nickel protoxide powder, pressing to obtain a pre-combination reaction block, mixing metallic nickel and carbon powder, and pressing to obtain a thermal reduction reaction block; 2, the pre-combination reaction block is heated to be molten to obtain a molten product, then the molten product and the thermal reduction reaction block are mixed for a carbon thermal reduction reaction, and an alloy melt is obtained; 3, casting the alloy melt under a vacuum condition, and cooling to obtain a nickel-boron intermediate alloy; the invention further discloses a preparation device of the nickel-boron intermediate alloy for the nickel-based high-temperature alloy. According to the preparation method disclosed by the invention, the pre-chemical combination and carbon thermal reduction processes are adopted, so that the formation of a boron-rich phase is effectively inhibited, the fluctuation increase and non-uniform distribution of the boron element content are avoided, a guarantee is provided for the subsequent proportioning link of the nickel-based high-temperature alloy, and the preparation method is suitable for the technical field of intermediate alloy preparation.

The invention discloses a high-homogeneity nickel-carbon intermediate alloy for aerospace-grade high-temperature alloys, the nickel-carbon intermediate alloy comprises the following elements in percentage by mass: 0.5-3.0% of C, and the balance of Ni and inevitable impurities, in addition, the invention also discloses a preparation method of the nickel-carbon intermediate alloy, and the preparation method comprises the following steps: 1, selecting nickel protoxide powder and carbon powder as raw materials; 2, drying the raw materials; 3, uniformly mixing the dried raw materials; 4, carbon thermal reduction-electromagnetic stirring; and 5, carrying out vacuum hot pressed sintering to obtain the high-homogeneity nickel-carbon intermediate alloy. The nickel-carbon intermediate alloy which is uniform in component, high in cleanliness and low in content of harmful gas elements and inclusions is obtained by keeping the vacuum degree in the high-pressure sintering process, ensuring sintering and forming in a high-temperature and high-pressure state, controlling sintering process parameters, reducing impurity introduction in the sintering process and meanwhile ensuring timely circulation of reaction gas; the method is suitable for the downstream high-temperature alloy field.

The invention provides a method for preparing uniform porous nickel particles through a self-template. The method comprises the following steps that firstly, nickel salt and a precipitator are mixed according to a preset proportion to prepare a solution, and the solution is placed in a reactor to prepare a layered basic nickel carbonate precursor (NiCO3.2N i (OH) 2.4 H2O); 2, calcining the prepared precursor in a high-temperature environment to obtain mesoporous nickel protoxide (NiO); and 3, the mesoporous nickel protoxide is subjected to high-temperature reduction in the H2 atmosphere, and the final product porous nickel particles are obtained. The novel preparation method is provided for producing the porous nickel particles, the raw materials are low in cost and easy to obtain, the prepared porous nickel particles are stable in structure and controllable in pore diameter, the production cost and the market price of the porous nickel particles are expected to be further reduced, and application of the porous nickel particles in the field of catalysis is expanded.

The invention relates to the technical field of non-ferrous metal hydrometallurgy, in particular to a nickel chloride solution desulfurization method which comprises the following steps: step 1, deoiling a nickel chloride solution through activated carbon and a cloth bag filter to obtain deoiled liquid; wherein the sulfur content in the nickel chloride solution is 15-25 ppm, the concentration of Ni < 2 + > is 90-110 g / L, and the pH value is 4-4.5; step 2, enabling the oil-removed liquid in the step 1 to enter a resin column according to a specified flow rate in a lower-in and upper-out manner, filling the resin column with resin, and adsorbing and reducing sulfur in the oil-removed liquid, so as to obtain a sulfur-removed nickel chloride solution; according to the method, the sulfur removal process is stable, other impurities are not generated or introduced, stable sulfur removal of the nickel chloride solution can be achieved, and due to the fact that the existence of sulfur in high-precision electronic-grade nickel protoxide directly influences stable operation and the service life of a battery material, liquid sulfur obtained after sulfur removal is conducted through the process is smaller than or equal to 10 ppm, and the sulfur content is smaller than or equal to 10 ppm. And the solution standard for producing a high-precision electronic-grade nickel protoxide product is met.

The method for producing the niobium-nickel intermediate alloy from the niobium-aluminum recycled materials comprises the following steps that materials are prepared, specifically, the niobium-aluminum recycled materials, nickel protoxide, calcium oxide, calcium fluoride and a heat generating agent are prepared according to the mass ratio of 1: (0.4-0.8): (0.01-0.05): (0.01-0.07): (0.1-0.4) and mixed to be uniform; treating the raw materials: drying the mixed materials at 100 DEG C to remove moisture; charging into a furnace; filling the mixed material into a reaction furnace body, compacting, and then spreading an ignition agent on the material for ignition to carry out aluminothermic reaction; according to the method, the niobium element in the niobium-aluminum recycled material is reduced through an aluminothermic reduction method, meanwhile, nickel protoxide is added in the reaction process, the nickel element is prepared, and a reducing agent is aluminum in the recycling rate; the one-step reduction reaction is adopted, independent niobium oxide does not need to be adopted while the niobium-nickel intermediate alloy is prepared, and recycling of useful elements in recycled materials is improved.

The invention relates to the technical field of nano nickel protoxide production, in particular to a continuous nano nickel protoxide preparation system and production process based on fluid dynamic regulation and control, the system comprises a fluid supply unit, the fluid supply unit is connected with a precision control unit, the precision control unit is connected with a reaction synthesis unit, and the reaction synthesis unit is connected with a control unit. The reaction synthesis unit is connected with a post-treatment unit, the fluid supply unit comprises a nickel salt precursor storage tank, a reducing agent storage tank and a pH regulator storage tank, and the nickel salt precursor storage tank, the reducing agent storage tank and the pH regulator storage tank are respectively provided with a storage tank equipped magnetic stirring device and a temperature control jacket. Through continuous production, the shutdown time and equipment cleaning time in intermittent production are reduced, the production efficiency is remarkably improved, the precise control unit can adjust fluid parameters in real time, the stability and consistency of reaction conditions are ensured, and the production efficiency is further improved.

The utility model discloses a device for conveying battery-grade nickel protoxide, which comprises a stirring motor, a stirring speed reducer, a feed port, a stock bin, a reverse thrust type helical ribbon stirrer, a conveying pipe, a group of double-side zigzag spirals, a gear, a spiral speed reducer and a spiral motor. Materials are scattered, stirred and dredged through reverse pushing type helical ribbon stirring, and the problem of operation interruption caused by material blockage of the stock bin is effectively solved; through the design of shaftless double-side sawtooth-shaped double helixes, the problems of spiral idling, locking, conveying pipe blocking and the like in the material conveying process are solved. The purposes of continuous and stable operation of material conveying, low equipment failure rate and great shortening of unplanned stopping time are achieved, and economic benefits are remarkable.

The invention discloses a method for purifying nickel protoxide from electroplating sludge and application, and belongs to the technical field of nickel protoxide preparation. The method comprises the following steps: mixing a nickel-containing electroplating sludge raw material with ammonia water, carrying out ammonia complexing leaching, and separating to obtain a first filtrate containing a nickel ammine complex; sulfide is added into the first filtrate under the alkaline condition, copper impurities are removed through precipitation, and second filtrate is obtained; adding sulfide into the second filtrate under an acidic condition to precipitate and remove zinc impurities so as to obtain third filtrate; carrying out acid treatment on the third filtrate to decompose and convert the nickel-ammonia complex into a nickel sulfate solution; and adding alkali into the solution to precipitate to generate nickel hydroxide, and calcining to obtain nickel protoxide. According to the method, high-selectivity extraction of nickel in the electroplating sludge and efficient and deep removal of impurities such as copper and zinc are achieved through the ammonia leaching and specific-sequence step-by-step vulcanization impurity removal technology, the technological process is reasonable, and the obtained nickel protoxide is high in purity and can be directly used for preparing a high-performance soft magnetic ferrite material; the recycling and high-value utilization of the hazardous wastes are realized.

The application discloses a nickel oxyhydroxide precursor for preparing nickel protoxide, a preparation method and application thereof. The peak intensity ratio of the nickel oxyhydroxide precursor is A, A=I(101) / I(001), and 0.40 The application controls I(101) / I(001) in a specific range by structural design of the nickel protoxide precursor, the crystal tends to grow along the (001) surface direction, presents a sheet or flattened morphology, the interface stability and product structural integrity are significantly improved, and the air stability is good; when the nickel protoxide is used as a raw material for preparing nickel protoxide, the nickel protoxide has rich wrinkle-shaped channels inside, the internal Ni can fully react with a lithium source, the particles have no obvious cracking, and then the particle morphology and structural integrity of the final product LNO are ensured, and efficient and stable preparation of the LNO is realized.

The invention relates to the technical field of preparation of inorganic functional materials, in particular to a production process of low-magnetism nickel protoxide, which comprises the following steps: pretreatment of a nickel chloride solution: pretreating nickel chloride hexahydrate to obtain the pretreated nickel chloride solution; the pretreated nickel chloride solution is pumped into a centrifugal atomizer of a spray pyrolysis device to form fine fog drops, the fog drops enter a pyrolysis furnace along with compressed air, three sections of temperature zones are arranged in the pyrolysis furnace, and the coarse nickel protoxide is prepared through precise temperature control and air quantity regulation; preparing a low-magnetism nickel oxide product; according to the method, the nickel chloride solution is used as a raw material, the magnetism is reduced through pretreatment complexing agent regulation, spray pyrolysis atomization parameter optimization and low-temperature ball milling dispersion, meanwhile, particles are uniformly dispersed, no obvious agglomeration phenomenon exists, and the low-magnetism small-granularity nickel protoxide product is prepared; the problems of high product magnetism, large particle size and serious agglomeration when nickel protoxide is prepared from a nickel chloride solution as a raw material in the prior art are solved.

The present invention discloses a preparation method of nickel-boron master alloy for nickel-based superalloys. The preparation method comprises the following steps: Step 1, mixing boric anhydride powder and nickel oxide powder and then pressing to obtain a pre-combination reaction block, and mixing metallic nickel and carbon powder and then pressing to obtain a thermal reduction reaction block; Step 2, heating the pre-combination reaction block to melting to obtain a molten product, and then mixing the molten product with the thermal reduction reaction block to carry out a carbothermal reduction reaction to obtain an alloy melt; Step 3, casting the alloy melt under vacuum conditions and cooling to obtain the nickel-boron master alloy. The present invention also discloses a preparation device of nickel-boron master alloy for nickel-based superalloys. The preparation method of the present invention effectively inhibits the formation of boron-rich phases by adopting the pre-combination + carbothermal reduction process, avoids the increase in the volatility of boron element content and uneven distribution, provides a guarantee for the subsequent batching process of nickel-based superalloys, and is applicable to the technical field of master alloy preparation.

The present invention discloses a preparation method of a nickel-chromium master alloy for nickel-based superalloys. The preparation method comprises the following steps: Step 1, mix chromium trioxide powder, carbon powder, nickel oxide powder and a dispersant, wrap them with multiple layers of nickel foil, and then place them in a mold for pressing to obtain a carbothermal reduction reaction block; Step 2, melt electrolytic nickel plates under vacuum conditions to obtain a nickel melt, carry out carbothermal reduction of the carbothermal reduction reaction block under an inert atmosphere, and then mix the nickel melt with the carbothermal reduction reaction block after carbothermal reduction for alloy smelting; Step 3, cool after casting to obtain the nickel-chromium master alloy. The present invention also discloses a preparation device of a nickel-chromium master alloy for nickel-based superalloys. The preparation method of the present invention uses chromium trioxide as a raw material, adopts a process coupling carbothermal reduction and alloy smelting, removes impurities in the alloy melt while ensuring the chromium reduction rate, and effectively improves the purity of the nickel-chromium master alloy, and is applicable to the technical field of master alloy preparation.

The invention relates to a method for reducing the content of chloride ions in a nickel protoxide product, which comprises the following steps: (1) screening and crushing coarse nickel protoxide with the chlorine content of 0.5-1.0% to obtain crushed nickel protoxide; (2) putting the crushed nickel protoxide into a slurrying kettle, adding pure water, stirring, slurrying and washing to obtain a mixture; (3) adding pure water into the mixture, and carrying out centrifugal separation to respectively obtain a water phase containing chloride ions and a solid; supplementing a water phase containing chloride ions to the tail gas leaching tower; and (4) drying the solid to constant weight, and detecting the finished product to obtain the nickel protoxide product with the chloride ion content of less than or equal to 0.03%. The process is simple, impurities cannot be introduced in the impurity removal process, the impurity removal cost is low, the economical efficiency is high, and the method is suitable for industrial production. After the method is adopted, a nickel protoxide product with the chlorine ion content being smaller than or equal to 0.03% can be obtained.

The invention belongs to the technical field of enamel materials, and particularly discloses an enamel ware capable of being placed in a microwave oven, which comprises a metal matrix, and a first enamel layer, a second enamel layer and a third enamel layer which are sequentially coated on the surface of the metal matrix; the first porcelain glaze layer is prepared from the following raw materials in percentage by mass: 1 to 5 percent of titanium dioxide, 40 to 55 percent of silicon dioxide, 2 to 5 percent of zirconium dioxide, 30 to 40 percent of diboron trioxide, 3 to 5 percent of aluminum oxide, 2 to 3 percent of cobalt oxide and 2 to 3 percent of nickel protoxide; the second ceramic glaze layer is prepared from the following raw materials: 1 to 5 percent of titanium dioxide, 48 to 50 percent of silicon dioxide, 3 to 5 percent of zirconium dioxide, 35 to 40 percent of diboron trioxide and 4 to 5 percent of aluminum oxide; and the second ceramic glaze layer is prepared from the following raw materials: 1-5% of titanium dioxide, 48-50% of silicon dioxide, 3-5% of zirconium dioxide, 35-40% of diboron trioxide and 4-5% of aluminum oxide, so that the protection on the metal matrix is enhanced, the metal matrix is prevented from generating electric sparks, the reflection of microwaves is weakened, the microwave oven is not damaged, and the purpose of using the ceramic glaze in the microwave oven is achieved.

The utility model discloses a high-temperature oxidation tunnel furnace for nickel protoxide processing, which relates to the technical field of oxidation tunnel furnaces and comprises a support base, the top of the support base is fixedly connected with a heat insulation shell, the bottom in a cavity of the heat insulation shell is fixedly connected with a resistance wire heating assembly, and the top of the resistance wire heating assembly is fixedly connected with a reaction furnace. The surface of the reaction furnace is sleeved with a heat conduction oil auxiliary device and a rapid cooling water device, and the two ends of the side wall of the heat insulation shell are fixedly connected with U-shaped double-cavity plates. According to the supporting base provided by the utility model, processed materials are rapidly cooled on the basis of rapidly mixing and drying the raw materials, so that the problems that the mixing efficiency of oxygen and liquid raw materials and the drying efficiency after mixing are low when the existing nickel protoxide processing high-temperature oxidation tunnel furnace is used are solved; and the processed nickel protoxide powder cannot be quickly cooled, so that the processing efficiency is influenced.

The invention discloses a preparation method of electronic-grade nickel protoxide, which comprises the following steps: reacting sodium carbonate with nickel sulfate to prepare a required precursor nickel carbonate, and carrying out centrifugal washing and drying to obtain the precursor nickel carbonate; and calcining the nickel carbonate at a certain temperature, and naturally cooling to obtain the nickel protoxide. The microstructure of the high-purity nickel protoxide basically retains the morphology of a precursor nickel carbonate, meanwhile, particles are good in dispersity and uniform in particle size distribution, the requirements of electronic-grade nickel protoxide are met, the requirements of the high-purity nickel protoxide in the fields of electrochemical energy storage (such as new energy automobile batteries) and catalysis are remarkable, and the high-purity nickel protoxide is suitable for industrial production. And particularly, the lithium battery positive electrode material becomes an important application direction of electronic-grade nickel protoxide.

The invention provides a nickel-based metal ceramic material and a preparation method thereof, and relates to the technical field of thermal spraying materials. The preparation method comprises the steps that nickel powder and reducing metal powder are mixed to obtain a nickel-based composite material; mixing nickel protoxide and rare earth oxide, and sintering to obtain a sintered oxidized ceramic material; and the sintered oxidized ceramic material and the nickel-based composite material are subjected to high-energy ball milling treatment, and the nickel-based metal ceramic material is obtained. The preparation method comprises the following steps: mixing nickel powder with reducing metal powder to form a nickel-based composite material with corrosion resistance; sintering the nickel protoxide, the ceramic and the rare earth oxide to generate a stable ceramic phase; the two are uniformly combined in particle size through high-energy ball milling, and the bonding strength and the structural stability are improved. The obtained material is suitable for thermal spraying, has good corrosion resistance and catalytic activity, and is suitable for frequent starting and stopping working conditions of electrodes.

The invention discloses a preparation method of a nickel-chromium intermediate alloy for a nickel-based superalloy, which comprises the following steps of: 1, mixing chromium sesquioxide powder, carbon powder, nickel protoxide powder and a dispersing agent, wrapping by adopting a plurality of layers of nickel foils, and pressing in a mold to obtain a carbon thermal reduction reaction block; step 2, melting an electrolytic nickel plate under a vacuum condition to obtain a nickel melt, carrying out carbon thermal reduction on the carbon thermal reduction reaction block in an inert atmosphere, then mixing the nickel melt with the carbon thermal reduction reaction block subjected to carbon thermal reduction, and carrying out alloy smelting; 3, cooling after casting to obtain a nickel-chromium intermediate alloy; the invention further discloses a preparation device of the nickel-chromium intermediate alloy for the nickel-based high-temperature alloy. According to the preparation method, chromium sesquioxide serves as the raw material, the carbon thermal reduction and alloy smelting coupling technology is adopted, impurities in the alloy melt are removed on the basis that the chromium reduction rate is guaranteed, the purity of the nickel-chromium intermediate alloy is effectively improved, and the preparation method is suitable for the technical field of intermediate alloy preparation.

The invention discloses a nanometer nickel protoxide preparation process based on coordination precursor pyrolysis, and belongs to the technical field of nanometer material preparation. According to the process, a gradient bond energy coordination system is constructed by compounding strong and weak coordination agents, oriented assembly is carried out by matching with an SDBS soft template, and asynchronous release of nickel ions and ordered growth of crystal nucleuses are realized through three-stage atmosphere coupling pyrolysis and water washing. The prepared nano nickel protoxide is uniform in particle size, low in agglomeration degree, few in carbon / sodium impurity residue, high in specific surface area, free of special equipment in process, simple and convenient to operate, controllable in cost and suitable for industrial batch production, and can be widely applied to the fields of energy storage, catalysis, sensing and the like.

The invention belongs to the technical field of high-temperature alloys, and particularly relates to a nickel-chromium intermediate alloy and a preparation method and application thereof. The preparation method of the nickel-chromium intermediate alloy provided by the invention comprises the following steps: mixing chromium sesquioxide, first oleic acid and a first dispersing agent, and carrying out first coating to obtain modified chromium sesquioxide; mixing nickel protoxide, second oleic acid and a second dispersing agent, and performing second coating to obtain modified nickel protoxide; mixing the modified chromium sesquioxide, the modified nickel protoxide, aluminum, a cooling agent, a grain boundary purifying agent and a slag former to obtain a mixed material; the mixed material is subjected to an aluminothermic reduction reaction and then subjected to induction melting and casting, and a nickel-chromium intermediate alloy is obtained; the aluminothermic reduction reaction is carried out in a protective atmosphere, and the induction melting is carried out in a hydrogen atmosphere. The nickel-chromium intermediate alloy prepared according to the preparation method provided by the invention is relatively low in impurity content and relatively low in burning loss rate.

This invention discloses a nickel-tantalum master alloy, comprising, by mass percentage: 40.0%–50.0% nickel, with the balance being tantalum and unavoidable impurities. The nickel-tantalum master alloy is prepared from nickel foil, nickel suboxide, tantalum pentoxide, aluminum powder, and calcium granules. The specific preparation method is as follows: nickel suboxide, tantalum pentoxide, and aluminum powder are mixed uniformly to obtain a mixture; calcium granules are spread evenly at the bottom of a crucible in a vacuum aluminothermic reaction furnace, and a layer of calcium oxide slurry is coated onto the inner wall of the crucible. After drying, the mixture is added to perform a vacuum aluminothermic / calcothermic reduction reaction to obtain a nickel-tantalum alloy liquid. After cooling, a primary nickel-tantalum alloy is obtained; tantalum pentoxide is wrapped in nickel foil to form multiple bales; the primary nickel-tantalum alloy is crushed, and the wrapped bales and crushed primary nickel-tantalum alloy are melted in a vacuum electron beam furnace; the melted alloy liquid is cooled to obtain the nickel-tantalum master alloy. The nickel-tantalum master alloy obtained by this invention has high uniformity and high purity.