Process for regenerating hydrochloric acid for chloridizing laterite nickel ore by wet method

The invention relates to a method for reproduction and utilization of hydrochloric acid in the process of extracting nickel and cobalt from laterite nickel ore. A chlorination treatment process of laterite nickel ore by wet method comprises the steps of preparing laterite nickel ore, leaching out chloride, concentrating leaching solution, precipitating by sulfurization, recovering hydrochloric acid, etc. The calcinating materials in the inventive hydrochloric acid reproduction process comprise the concentrated solution of the mother liquid after nickel precipitation, iron chloride and magnesium chloride crystals obtained during concentration of the leaching solution, and coal powder. The inventive method comprises the steps of mixing and blending materials to obtain slurry, and spraying into a high-temperature furnace, or calcinating the materials in high-temperature furnaces at 500-800DEG C, hydrolyzing metallic chloride into hydrogen chloride and metal oxide, heating the concentratedleaching ...

Method and device for predicting temperature of cable

The invention discloses a cable temperature prediction method and device, and the method comprises the steps: obtaining a thermal circuit parameter of a to-be-measured cable and a cable temperature training sample of a cable database, carrying out the calculation of cable core temperature sequence data of the to-be-measured cable according to the thermal circuit parameter, and carrying out the calculation of the cable core temperature sequence data through employing an empirical mode decomposition method and a complete set empirical mode decomposition method, and carrying out stabilization processing on the cable core temperature sequence data to obtain stabilized temperature sequence data, establishing a time sequence combination prediction model based on a cable temperature training sample, inputting the thermal circuit parameters and the stabilized sequence data into the time sequence combination prediction model, and carrying out calculation to obtain real-time temperature prediction ...

Method for preparing lithium titanate precursor from titanic iron ore

The invention discloses a method for preparing a lithium titanate precursor from a titanic iron ore. The method comprises the following steps of: leaching the titanic iron ore to obtain titanium slag by using an acid; pulping the titanium slag by using alkali and adjusting the pH of the pulp to be 4 to 14; adding a complexing agent into a stirred reactor at the temperature of 20 to 80 DEG C for leaching and adjusting the pH to be 4 to 14 in a reaction process by using the alkali; heating obtained filtrate to 80 to 110 DEG C, filtering and washing the filtrate to obtain precipitate; and drying the precipitate at the temperature of 50 to 150 DEG C to obtain the precursor of lithium-ion battery cathode material lithium titanate, namely the complex of titanium, or calcining the dried precipitate at the temperature of 400 to 900 DEG C to obtain another precursor of the lithium-ion battery cathode material lithium titanate, namely anatase titanium dioxide (TiO2). The method has the advantages ...

Method for efficiently concentrating cobalt and nickel from low-grade nickeliferous laterite ore

The invention provides a method for efficiently concentrating cobalt and nickel from a low-grade nickeliferous laterite ore. The method is based on mine-phase reconstruction, and the ore is subject to physical treatment, high temperature chlorination and reduction roasting to convert the nickel and the cobalt in the ore from oxide or composite oxide (silicate and ferrite) mineral into magnetic metal or alloy, magnetic separation method or combined floatation-magnetic separation method is used for separation to concentrate the cobalt and the nickel. The method is used for treating the low-grade nickeliferous laterite ore (Ni is 0.2-2.0%), contents of the nickel ore concentrate is more than ten times of that of the crude nickel ore; and the nickel recovery is more than 80%.

Method for pre-de-magnesium enriched lithium from salt lake bittern with high-magnesium-lithium ratio with dry method de-magnesium

The invention relates to a method for removing magnesium-enriched lithium in advance from saline lake brine with a high magnesium-lithium ratio through dry-process magnesium removal. The method is to take the saline lake brine with the high magnesium-lithium ratio as a raw material and adopt the technological steps of brine concentration, spray drying, granulation, roasting, water leaching, and the like to remove most magnesium in the brine, so that lithium can be conveniently extracted with low cost. The main technical points of the method comprises that: the dry-process magnesium removal isbased on a high-temperature hydrolysis principle of magnesium chloride to convert most soluble magnesium compounds into magnesium compounds (MgO) which are difficult to be dissolved in water, and magnesium oxychloride (MgOHCl) which is hydrolyzed in the water, so that soluble lithium chloride and magnesium chloride (which are mainly generated by hydrolysis under the condition of the water leaching of ...

Electroplating effluent's copper recycling processed system

The utility model discloses an electroplating effluent's copper recycling processed system, its technical scheme main points are: including ion exchange purifier, materialization processing apparatus and copper recovery unit, carrying out purification treatment with sewage through purifier and materialization processing apparatus, reclaiing through the copper of copper recovery unit in with sewage, this kind of system can carry out the recovery of copper metal, and to electroplating water's purification treatment high efficiency, the energy consumption is few, and is fit for procesing a large amount of waste water.

Method for preparing ferric lithium phosphate precursor by comprehensive utilization of ilmenite

The invention discloses a preparation method for lithium iron phosphate precursor by comprehensively utilizing ilmenite, comprising a plurality of steps: leach the ilmenite in acid and filtrate is obtained by filtering; dissolve a certain amount of other iron sources in the filtrate to make the Fe concentration in the mixed solution as 0.01-3mol/L and the molar ratio of Ti and Fe as 0.0005-0.5; add appropriate amount of oxidant to the mixed solution; use alkali aqueous solution to regulate the system pH as 4.0-14.0; react for 10min to 24h at 10-90 DEG Cin a stir reactor; filter, wash and dry the sedimentation at 50-159 DEG C; after drying, calcine the sedimentation in air at 300-800 DEG C for 1-24h; lithium iron phosphate precursor for the lithium-ion battery cathode material, which is also the ferric oxide of doped-metal elements, can be obtained. The preparation method has the advantages of wide material source, simple technological process, good and stable product quality and low cost ...

Process for comprehensively developing and utilizing nickel, cobalt, iron and magnesium from laterite-nickel ore

The invention relates to a method for compressively developing and utilizing nickel and cobalt in a lateritic nickel ore. The lateritic nickel ore is used as the raw material; the technical flows of mining, defibrination and ore preparation, pressurizing and wet chlorinating extraction, separating the nickel (cobalt) and iron by extraction, hydrolyzing magnesium chloride with a high temperature, magnetizing and roasting the extracted slag, magnetically separating, etc., and the like, are adopted to extract the middle product of the nickel and cobalt, recycle the light magnesium chloride and the materials used for pudding. The invention is mainly characterized in that the nickel and cobalt in the lateritic nickel ore is firstly and selectively dissolved and extracted by using the pressurized muriatic acid; a depositing method is used on the nickel and cobalt in a liquid to obtain the middle product; the mother liquid after the nickel is deposited is hydrolyzed by high temperature to obtain ...

Cylindrical lithium-ion power battery and preparation method thereof

The invention relates to a cylindrical lithium-ion power battery, the battery is in a cake shape, the diameter and the height of the battery is more than or equal to 4, and the diameter of the battery is more than or equal to 6mm; the anode shell of the battery is made of aluminium alloy, and the cathode shell is made of copper alloy or stainless steel; the anode and cathode slurry is prepared by adopting a conventional method, and then clearance coating is carried out in a current collector along the width direction, and then drying, film rolling and cutting are carried out to obtain a pole piece where 1-3mm of the current collector is exposed at one end along the height direction of the pole piece; one group or a plurality of groups of anode and cathode pieces are adopted to manufacture rolling cores with the film, the rolling core is arranged in the battery shell, electrolyte solution is injected, sealing is carried out, and the lithium-ion power battery is obtained by charging and discharging ...

ZmAGO1a protein as well as coding gene and application thereof

The invention discloses ZmAGO1a protein as well as a coding gene and application thereof. The protein disclosed by the invention is represented as follows: (1), protein represented by SEQ ID No.2; and (2), protein obtained by substitution and/or deletion and/or addition of an amino acid sequence represented by SEQ ID No.2 through one or more amino acid residues and having same functions. The ZmAGO1a gene disclosed by the invention is capable of obviously influencing growth and development of plants, such as fecundity, a maturation period (early maturation), florescence, the number of leaves, the sizes of the leaves, the shapes of the leaves and the colors of the leaves; most of the characteristics belong to important agronomic characteristics and are related to the yield, growth period and plant type of plants; and the ZmAGO1a protein disclosed by the invention has important application value in cultivation of high-yield, stress-tolerant and high-efficiency plants (such as corns).

Lithium ion battery composite anode material and preparation method thereof

The invention discloses a lithium ion battery silicon carbon composite anode material and a preparation method thereof. The material is prepared by twice spray drying and once sintering. The preparation method comprises the following steps of: 1) dissolving an organic carbon source in an appropriate amount of solvent, adding a silicon source and a dispersing agent for dispersing suspension uniformly, adding graphitized carbon for dispersing the suspension for a certain period of time, and performing primary spray drying on the uniformly dispersed suspension to obtain a spherical nucleus material; and 2) dissolving the organic carbon source in the appropriate amount of the solvent, adding the prepared spherical nucleus material, dispersing the suspension uniformly, performing secondary spray drying on the uniformly dispersed suspension to obtain powder, transferring the powder into a protective atmosphere for sintering, and performing furnace cooling on the powder to obtain the lithium ion ...

Waste water treatment complete sets

The utility model discloses a waste water treatment complete sets for waste water treatment in clarifying basin, aeration tank and the equalizing basin, including equalizing basin equipment, air supporting case, microelectrolysis reaction box, aeration case, ozone air floating case, filter, reverse osmosis equipment, reuse water equipment, controlgear and power supply unit, equalizing basin equipment pipe connection is in the air supporting case, air supporting case pipe connection is in the microelectrolysis reaction box, microelectrolysis reaction box pipe connection is in the aeration case, the aeration case communicates to the clarifying basin, the clarifying basin communicates in the aeration tank, the aeration tank communicates the case in ozone air floating, the ozone air floating case communicates in the filter, the filter communicates the equipment in reverse osmosis, reverse osmosis equipment communicates in reuse water equipment, controlgear signal connection is in equalizing ...

Electrolysis method for separating copper from cobalt and nickel in chloride ion ammoniacal system and application of products thereof

The invention discloses a method for separating copper from cobalt and nickel in a chloride ion ammoniacal system. The method mainly adopts an electrolysis separation technology, which comprises the following steps: dissolving a proper amount of at least one of copper salt, cobalt salt and nickel salt in a leached liquid of an analogue mineral sample containing copper, cobalt and nickel, adding ammonium chloride and a proper amount of active metal chloride into the solution, finally adding concentrated ammonia water so as to obtain an electrolytic system; carrying out electrolysis on the electrolytic system by taking graphite as the positive electrode and a stainless steel plate as the negative electrode, controlling the voltage to carry out electrolysis separation, and carrying out deposition to obtain the copper powder with high copper content and low nickel and cobalt content and electrolysis residual liquid with enriched nickel and cobalt. The electrolysis method has the advantages ...

Method for controlling residual lithium on surface of layered nickelic positive electrode material

The invention discloses a method for controlling residual lithium on surface of a layered nickelic positive electrode material. The method comprises the following steps: detecting a residual quantity x of lithium element in the layered nickelic positive electrode material which is prepared or obtained and representing the mass fraction of the obtained residual lithium in the layered nickelic positive electrode material by using x; measuring and calculating solubility s of a specific lithium source under certain temperature in pure water; preparing a specific lithium source aqueous solution with a specific mass concentration according to the measured lithium element residual quantity x and the solubility s; then fully washing the layered nickelic positive electrode material with the prepared specific lithium source aqueous solution; finally separating solid and liquid and drying to obtain the layered nickelic positive electrode material with controlled residual lithium on the surface. The ...

Method and device for preventing oxidation in synthesis of anode material of lithium-ion battery

The invention discloses a method and a device for preventing oxidation in synthesis of an anode material of a lithium-ion battery. The method comprises the following steps of: filling raw materials needed for synthesizing the anode material of the lithium-ion battery in a bottom part of a reactor, wherein the region is called a material loading region; filling a reducing agent or an inert material which does not participate in chemical reactions at a high temperature in a region above the material loading region, wherein the region is called an isolation region; placing the filled reactor into an electric furnace for sintering at a high temperature; and maintaining an oxygen content of 0.5 to 30 percent of the air in the reaction region in the electric furnace; and thus obtaining the needed anode material of a lithium-ion battery. The process is technical method, convenient in operation and reasonable in structure, can effectively reduce the production cost for synthesizing the anode material ...

Method and device for predicting insulation state of cable

The invention discloses a cable insulation state prediction method and device, and the method comprises the steps: obtaining cable joint structure parameters of a to-be-detected cable and a cable insulation state training sample of a cable database, and carrying out the simulation calculation of the cable insulation state of the to-be-detected cable according to the cable joint structure parameters through a multi-physical field simulation calculation method; calculating cable surface temperature, cable current data and environment temperature of a to-be-detected cable, establishing an insulation state prediction model based on a cable insulation state training sample by adopting a sparrow search algorithm and a kernel extreme learning machine algorithm, inputting the cable surface temperature, the cable current data and the environment temperature into the insulation state prediction model, and predicting the insulation state of the to-be-detected cable. And calculating to obtain insulation ...

Carbon-carbon multi-component negative electrode material and preparation method thereof

The invention relates to a carbon-carbon multi-component negative electrode material. The carbon-carbon multi-component negative electrode material is mainly composed of flexible graphite, nanometer silicon and amorphous carbon which respectively account for 30-60%, 30-50% and 10-30% based on mass percent, the amorphous carbon is obtained through high-temperature pyrolyzation of an organic carbon source, and the flexible graphite is obtained by applying pressure to expanded graphite. A preparation method of the product comprises the steps of: firstly, preparing an expanded graphite/silicon-silicon dioxide/carbon composite negative electrode material through high-temperature pyrolyzation; secondly, pouring the expanded graphite/silicon-silicon dioxide/carbon composite negative electrode material into a mould and applying pressure to obtain a flexible graphite/silicon-silicon dioxide/carbon composite negative electrode material; thirdly, processing silicon dioxide to obtain a flexible graphite ...

Spray booth exhaust -gas treatment equipment

The utility model discloses a spray booth exhaust -gas treatment equipment, including adsorption and filtration ware, air inlet pipeline and be used for connecting the fan of adsorption and filtration ware and air inlet pipeline, the adsorption and filtration ware includes the box and is located the active carbon adsorption board group of box, the active carbon adsorption board that active carbon adsorption board group set up including two sets of symmetries, be equipped with interval distribution's through -hole and absorption piece on the active carbon adsorption board, be connected with the baffle between the active carbon adsorption board. The utility model discloses it is better to adsorb purifying effect.

Electric pile temperature control device suitable for hydrogen-electricity hybrid electric vehicle and control method of electric pile temperature control device

The invention discloses an electric pile temperature control device suitable for a hydrogen-electricity hybrid electric vehicle and a control method of the electric pile temperature control device, and relates to the technical field of automobile, the electric pile temperature control device comprises an electric pile, a hydrogen internal combustion engine small circulation cooling pipeline and an electric pile cooling system, and the electric pile is used for enabling hydrogen and oxygen to react to generate electric energy and heat; the hydrogen internal combustion engine small circulation cooling pipeline is used for conveying heat generated by the hydrogen internal combustion engine to a water inlet of the electric pile cooling system through cooling liquid; the electric pile cooling system comprises a three-way valve III, a radiator, a three-way valve IV, a three-way valve V, a deionizer, a water pump, a three-way valve II and a three-way valve I, and a water outlet of the electric ...

Preparation method and application of thick oil viscosity reducer

The invention relates to the technical field of petroleum gathering and transportation, and discloses a thick oil viscosity reducer preparation method, which comprises: S1, material preparation: preparing a base liquid, an auxiliary agent, fatty acid amide and humic acid; s2, stirring: putting the basic liquid, the auxiliary agent and the fatty acid amide into a reaction kettle with the internal temperature of 35-45 DEG C for stirring treatment, then gradually adding the humic acid, then heating to 150-180 DEG C, and continuously stirring for 15 minutes; and S3, preparation: after stirring in the step S2 is finished, air is injected, then heating is continued to 150-180 DEG C, and finally catalytic oxidation is carried out, so that the thick oil viscosity reducer can be prepared, the weight part of the base liquid is 45-55, and the base liquid is prepared from methyl chlorosilane, polyacrylonitrile, an organic tin catalyst and fluoroalkyl siloxane. The thick oil viscosity reducer prepared ...

Lithium ion battery composite anode material and preparation method thereof

The invention discloses a lithium ion battery composite anode material, which is a composite material produced by coating the surface of activated nanometer silicon with poly(3,4-ethylenedioxythiophene) and graphene. The invention further discloses a preparation method of the lithium ion battery composite anode material. The method comprises the steps as follows: using conducting polymer poly(3,4-ethylenedioxythiophene) with high conductivity and graphene with excellent mechanical properties to form composite structures, and then evenly coating the surface of the activated nanometer silicon with the composite structures. The cycling stability and rate capability of the anode material can be improved.

Method for preparing nano-scale magnesium hydrate by extracting magnesium from low grade laterite nickel ore hydrochloric acid leaching liquid

The invention discloses a method for preparing nano magnesium hydroxide through extracting magnesium from low-grade lateritic nickel hydrochloric-acid leaching liquid. Ferrum is extracted and separated from the leaching liquid at room temperature; the pH value is adjusted to remove Al and Cr; a curing ingredient is added to separate valuable metals that are Ni, Co, Mn and Cu from the leaching liquid; excess oxalic amine is added to remove calcium; alkali is added to the leaching liquid at the temperature ranging from 30 to 90 DEG C and used as a precipitator; a surface active agent, the concentration of which is 2 to 10 percent, is added; the reaction is conducted for 10 to 120 minutes under a constant temperature, the ageing is conducted for 30 to 240 minutes, and the nano magnesium hydroxide is obtained. The method extracts the magnesium from the leaching liquid of the low-grade lateritic nickel to prepare the nano magnesium hydroxide under the room temperature and normal atmosphere, ...

Method for processing nickel cobalt extracted from laterite-nickel ore by chloride cycle desiliconisation ferrous process

The invention provides a method for treating laterite-nickel ores to extract nickel and cobalt by the chloride cycle silicon iron removal method. Ores are crushed and ball-milled to obtain ore powder, the ore powder is added with hydrochloric acid with high concentration used as a chlorinating agent and heated and stirred in the normal pressure for chlorination to obtain a leaching liquid and silicon slag; the leaching liquid and the silicon slag are separated; the leaching liquid is subjected to heating concentration for dechlorination; hydrochloric acid is reclaimed by the simultaneous condensation of HCl and vapor; a silicon removal mother liquid is obtained through filtration washing; the silicon removal mother liquid is subjected to heating evaporation for obtaining vapor; the obtained vapor is condensed into hydrochloric acid by heat reclaiming; simultaneously because of the hydrolytic precipitation of iron caused by deacidification and the condensation of the liquid, the iron slag ...

Basicity etching solution electrolyte circulation regeneration system

The utility model discloses a basicity etching solution electrolyte circulation regeneration system, including power and control system, electrolysis system, extraction system, anti - collection system, distribution system and storage device, including the reverse osmosis unit who is used for improving the interior copper ion concentration of extractant in the extraction system. Extractant accessible reverse osmosis unit after the extraction further improves copper ion concentration in the extractant, is the limit of dissolving that copper ion concentration can exceed the extractant in the extractant, reduces the anti - collection the required time of in -process, improvement basicity etching solution electrolyte circulation regeneration system's work efficiency.

Method for determining internal hot spot temperature of three-core cable and related device

The invention discloses a three-core cable internal hot-spot temperature determination method and a related device. The method comprises the following steps: acquiring a historical operation information data set of a three-core cable and a corresponding historical internal hot-spot temperature from a preset database set; performing feature extraction on the historical operation information data set by adopting a principal component analysis method and taking the historical internal hot spot temperature as a target to obtain a data set dimension reduction result; introducing a qualitative virtual variable, and determining an analysis variable data set generating influence factors based on a data set dimension reduction result; establishing a multiple linear regression model related to the virtual variable and the analysis variable data set; and acquiring a real-time operation information data set of the three-core cable, and determining the internal hot-spot temperature of the three-core ...

Method of preparing high purity magnesiun sand using salt lake bischofite as raw material

A process for preparing high-purity magnesium sand from the bischofite of salt lake includes such steps as preparing high-concentration saline from bischofite, depositing magnesium by ammonia method including adding crystal seeds, controlled reacting, depositing particles of magnesium hydroxide, filtering, washing, drying and two-step calcining to obtain target product containing MgO (more than 99.95%).

Preparation method of high-purity nano aluminium fluoride

Method for leaching nickel-cobalt from low-grade laterite nickel ore

The invention provides a method for leaching nickel and cobalt from low-grade laterite-nickel ore, comprising the steps that: smash, grinding and size mixing the ore, controlling the ore granule -100mesh; adding ore pulp into a reaction kettle for atmospheric pressure acid leaching; strengthening by a reducer during the leaching process. The leaching condition is: the ratio of acid to material is0.2:1-0.5:1; the ratio of solid to liquid is 3:1-5:1; the temperature is 60 to 95 DEG C; electroequivalent of the reducer according to Fe in the ore is 0.5-1.0; the leaching time is 60 to 240 minutes; and the lixivium is partially cycled during the leaching process to control the nickel concentration greater than 2g/L. In the method for processing low-grade laterite-nickel ore, the leaching rateof nickel is greater than 90%, the leaching rate of cobalt is greater than 85%, and the leaching rate of ferrum is lower than 30%.

Method and device for automatically cleaning umbrella skirts of primary equipment of transformer substation

The invention relates to the technical field of umbrella skirt cleaning, in particular to a transformer substation primary equipment umbrella skirt automatic cleaning method and a cleaning device.The cleaning method comprises the following steps that S1, a laser scanning module, a cleanliness collecting module and a cleaning module are arranged on the surface of an umbrella skirt; s2, performing laser scanning on the surface of the umbrella skirt by using a laser scanning module to obtain an umbrella skirt surface image; s3, carrying out dirt scanning on the surface of the umbrella skirt by utilizing a cleanliness acquisition module; s4, the surface of the umbrella skirt is cleaned through a cleaning module; s5, carrying out dirt scanning on the cleaned umbrella skirt surface by using the cleanliness acquisition module again; s6, judging whether the treatment smudginess degree of the surface of the umbrella skirt reaches the standard or not, if not, circulating the steps S4-S5 until the ...

Pressure release protection device and system for overhigh oil pressure in transformer

The invention provides a pressure release protection device and system for excessive oil pressure in a transformer, and belongs to the technical field of power transformers. The device comprises a two-stage pressure relief valve module installed at the original pressure relief valve installation position of the transformer, the two-stage pressure relief valve module is obtained by connecting two pressure relief valves with completely consistent model parameters in series, one end of the two-stage pressure relief valve module is connected with a pressure relief outlet of the transformer, and the other end of the two-stage pressure relief valve module is connected with an oil guide pipe; the system further comprises a detection control module. When the transformer operates normally, any one pressure relief valve in the two-stage pressure relief valve module is subjected to a pressurization test, the other pressure relief valve keeps working normally, the states of the two pressure relief ...

Method for preparing ferric lithium phosphate precursor by comprehensive utilization of ilmenite

The invention discloses a method for comprehensively utilizing titanic iron ore to prepare a precursor of the lithium iron phosphate, which is characterized in that titanium iron ore is immerged into an acid, filtering, a quantitative other ore resource is dissolved in the filtered solution, making the Fe concentration in the mixed solution to be from 0.01 to 3 mol/L and the molar ration of Ti to Fe to be from 0.0005 to 0.3; an oxidant and a sedimentation agent are put into the solution, wherein the concentration of the oxidant and the sedimentation agent is from 0.01 to 3 mol/L, using an alkaline solution from 0.01 to 6 mol/L to control pH value of the system between 1.5 and 6.0, reacting for from 5 minutes to 24 hours in an agitating reactor at a temperature of between 20 and 90 degree centigrade, the attained sedimentation is rinsed and filtered, the precursor of the lithium iron phosphate for the anode material of a lithium-ion battery is got after the attained sedimentation continues ...

Process for abstracting nickel and cobalt by using wet method to chloridize laterite-nickel ore

The invention relates to a method for extracting nickel and cobalt from a laterite-nickel ore, comprising the following steps of mineral preparation, chloride leaching, solid-liquid separation, leaching liquid concentration, sulfide precipitation, solid-liquid separation and hydrochloric acid recovery of the laterite-nickel ore. A chloride leaching agent is mixing solution of metal chloride and hydrochloric acid; the leaching liquid is concentrated by heating; ferric chloride and magnesium chloride are crystallized and separated out so that Fe/Ni ratio is reduced below 1/5 of Fe/Ni ratio before the concentration; the magnesium oxide or the ferric oxide generated in the hydrochloric acid recovery process is used as neutralizer; polysulfide, just precipitated metal sulfide and metal sulfide are used as sulfuration precipitator; mother liquor with precipitated nickel is roasted with the ferric chloride and the magnesium chloride which are obtained by concentrating the leaching liquid; the ...

Electrochemical energy storage system of energy storage power station and protection control method

The invention discloses an electrochemical energy storage system of an energy storage power station and a protection control method.The electrochemical energy storage system of the energy storage power station structurally comprises a wire, a plurality of transformers, a plurality of energy storage converters and a plurality of storage battery packs, switching elements are arranged between the bus and the transformer, between the transformer and the energy storage converter, and between the energy storage converter and the storage battery pack; high-voltage side windings of the transformer are respectively connected to different sections of the bus; the alternating current sides of the energy storage converters are connected with a low-voltage side winding of the transformer, and the multiple energy storage converters are connected into the transformer in parallel, so that a multi-equipment segmented parallel wiring structure is realized, flexible and diversified operation modes can be ...

Chlorination segregation method for enriching nickel and cobalt from nickel laterite

The invention discloses a chlorination segregation method for enriching nickel and cobalt from nickel laterite, which comprises the following steps of: drying the laterite; blending, mixing and pelletizing: blending a chlorinating agent and a reducing agent into the treated nickel laterite, mixing and pelletizing, wherein the adding amount of the chlorinating agent is 5 to 10 percent of the mass of the laterite, and the adding amount of the reducing agent is 3 to 6 percent of the mass of the laterite; preheating the laterite balls, wherein the heating temperature ensures that the balls store heat and do not undergo chemical reaction; putting the heated mixed laterite balls into a chlorination segregation reactor, and performing chlorination segregation roasting of nickel and cobalt at the temperature of between 900 DEG C and 1,100 DEG C; enriching the nickel and the cobalt by magnetic separation: directly performing water quenching and wet fine milling on the roasted balls; then enriching ...

Prefabricated cabin top cover, prefabricated cabin and prefabricated cabin type transformer substation

The invention provides a prefabricated cabin top cover, a prefabricated cabin and a prefabricated cabin type transformer substation. The prefabricated cabin top cover comprises a left track, a right track, a front half top cover, a rear half top cover and a driving mechanism, wherein the left track and the right track are parallel to each other; the front half top cover and the rear half top cover are foldable plates which are formed by hinging grid plates through rotating shafts; the rear side of the front half top cover abuts against the front side of the rear half top cover, and the front side of the front half top cover and the rear side of the rear half top cover are used for being correspondingly hinged to the top ends of the front enclosure wall and the rear enclosure wall of the prefabricated cabin. The rotating shafts comprise the first rotating shaft and the second rotating shaft, rollers are arranged at the two ends of the first rotating shaft, an angle limiting piece is arranged ...

High capacity and Coulomb-efficiency lithium-ion capacitance battery anode system

The invention relates to a high capacity and Coulomb-efficiency lithium-ion capacitance battery anode system, belonging to the field of electrochemistry. The lithium-ion capacitance battery anode material comprises graphite-base anode material and activated carbon, and the electrolyte solution comprises ionic liquid and lithium salt, wherein the lithium salt is LiPF6 or LiN(CF3SO2)2, and the ionic liquid is 1-ethyl-3-methylimidazolium bis((trifluoromethyl)sulfonyl)imide salt or N-methyl, propyl piperidinium bis((trifluoromethyl)sulfonyl)imide which is used as solvent. The organic solvent of propylene carbonate, ethylene carbonate, dimethyl carbonate or ethyl methyl carbonate can be added into the electrolyte solution to be used as the functional additive. The capacity and the Coulomb efficiency of the lithium-ion capacitance battery anode material can be markedly improved in the electrolyte solution.

Method for improving nickel cobalt leaching rate from lateritic nickel at low cost

The invention provides a low-cost method for improving the nickel-cobalt leaching rate of low-grade lateritic nickel ore. In the method, laterite ore is roasted twice, wherein primary roasting is hermetically carried out for about 30 minutes at a temperature between 90 and 110 DEG C, and secondary roasting is carried out for about 1 hour at a temperature between 260 and 420 DEG C under the condition with air supply, so as to change the phase structure of nickel-cobalt-containing metal in mineral, ensure that the nickel-cobalt-containing metal is easier to leach by leaching agents and raise the nickel-cobalt leaching rate with low acid consumption at a low temperature. At the same time of roasting, the method changes the existence structure of iron, increases leaching activation energy, and reduces the leaching of iron. A roasting material is cooled to about 50 DEG C in air, and leaching is carried out by adding sulfuric acid or hydrochloric acid at about 50 DEG C. The leaching rate ofnickel ...

Method for comprehensively utilizing lepidolite mineralogical reconstruction lithium-extraction slags

The invention provides a method for comprehensively utilizing lepidolite mineralogical reconstruction lithium-extraction slags, wherein the technique of extracting battery-grade lithium carbonate by treating lepidolite by a mineralogical reconstruction method is set as the background of the method, and the lepidolite mineralogical reconstruction lithium-extraction leaching slags are utilized comprehensively. The lithium-extraction leaching slags are subjected to the process steps of stripping, precipitating aluminum hydroxide by a conversion method, concentrating and crystallizing calcium chloride, selecting fluorite out of acid leaching slags, and all the steps cooperate with one another to realizing economic and efficient utilization of the lithium slags together.

Fire-fighting control system for battery cabinet of electrochemical energy storage station

The invention discloses a fire control system for a battery cabinet of an electrochemical energy storage station, and relates to the technical field of fire safety. According to the fire-fighting control system for the battery cabinet of the electrochemical energy storage station, the battery cabinet is divided into a plurality of independent sub-battery cabins, so that the problem that all battery modules are damaged due to ignition of one battery module when all the battery modules are stacked in the same space is solved; a plurality of combustible gas sensor modules are used for judging whether combustible gas exists in the sub-battery cabins or not, a plurality of smoke sensing probes are used for judging whether smoke exists in the sub-battery cabins or not, the problem of false alarm is avoided, when the combustible gas exists in the sub-battery cabins, a gas abnormity alarm is given out, and when smoke exists in the battery cabins, an alarm is given out. And when short-circuit signals ...

Self-electricity-rotating method, device and equipment of feeder line of power distribution network and medium

The invention discloses a power distribution network feeder line self-rotation power supply method, device and equipment and a medium, and the method comprises the steps: starting a self-rotation power supply function through responding to a position fault signal of a power distribution network feeder line; determining a corresponding position fault according to the position fault signal, and judging whether first waiting time associated with the self-rotation function is equal to preset first time or not; if not, when action signals and protection signals of all section switches of the feeder line of the power distribution network are collected, blocking signals corresponding to the position faults are generated; and executing corresponding rotation electric operation according to the locking signal and the position fault until it is judged that the rotation electric function is executed successfully. The technical problem of low power supply reliability of the power distribution network ...

Method and device for extracting lithium from lapidolite by chloridizing roasting method

The invention discloses a method and a device for extracting lithium, which is used for preparing lithium carbonate, from a lapidolite ore by a chloridizing roasting method. The method comprises the following steps of: firstly, mixing the lapidolite ore, calcium chloride and sodium hydroxide with a compound bonding agent for pellet fabrication; secondly, performing chloridizing roasting in a square-frame shaped track type roasting furnace; thirdly, leaching out soot dust by using solution containing sodium carbonate and potassium carbonate to ensure that potassium, sodium, rubidium and cesiumenter the solution and convert the lithium into lithium carbonate; fourthly, filtering the mixture to obtain a lithium carbonate solid, and circularly using the filtrated mother liquor to leach out the soot dust; fifthly, when an alkali metal salt is close to be saturated, indirectly heating the filtrated mother liquor by using the residual heat of the gas in the roasting furnace to evaporate part of ...

Method for collecting nickel and cobalt from laterite-nickel ore lixivium by using sulfide precipitation

The invention provides a method for enriching nickel and cobalt from lateritic nickel ore lixivium. The method comprises the steps of concentration and pH value adjustment of pickle liquor, precipitation through adopting composite vulcanizing agent, solid-liquid separation, washing and filtrate processing. The composite vulcanizing agent consists of vulcanizing agent A containing hydrogen ions and vulcanizing agent B without the hydrogen ions. The method uses 1 to 95 percent of the vulcanizing agent A and 5 to 99 percent of the vulcanizing agent B in the composite vulcanizing agent. The pH value of the pickle liquor can be maintained or changed slowly through adjusting the pH value of the pickle liquor of the lateritic nickel ore to be a set value and slowly adding the composite vulcanizing agent, thereby acquiring a sulphide product enriched with nickel-cobalt. The mass ratio of nickel and the vulcanizing agent is between 1 to 1.6 and 5. A buffer system formed by the vulcanizing agent ...

Method for preparing lithium titanate precursor and lithium iron phosphate precursor by comprehensively utilizing ilmenite

The invention discloses a method for preparing a lithium titanate precursor and a lithium iron phosphate precursor by comprehensively utilizing ilmenite. The method is characterized by comprising the following steps of: 1) separating ferrotitanium: performing ball milling on the ilmenite, leaching the ilmenite with sulfuric acid, cooling and filtering the leached ilmenite to obtain filter residue and filtrate; 2) preparing a lithium titanate precursor: washing the obtained filter residue with dilute sulfuric acid, dissolving the filter residue in 75 to 90 percent sulfuric acid, diluting the mixture, adding a precipitator into the mixture for reaction, cooling, standing and filtering the mixture, and drying the filter residue to obtain the precursor of the lithium titanate; and 3) preparing the lithium iron phosphate precursor: diluting the filtrate, adding oxidant and precipitator into the solution, controlling the pH value of the system with aqueous solution of alkali, and washing, filtering ...

Self-electricity-rotating method, device and equipment of power distribution network line and medium

The invention discloses a self-rotation power generation method, device and equipment for a power distribution network line and a medium, and the method comprises the steps: generating a local self-rotation power generation instruction and a centralized control self-rotation power generation instruction when a fault signal fed back by the power distribution network line is received, and carrying out the self-rotation power generation according to the fault signal and the centralized control self-rotation power generation instruction. Selecting a target interconnection switch on the power distribution network line to perform switching-on operation, judging whether the target interconnection switch is switched on or not, when the target interconnection switch is switched on, judging whether the voltage loss side of the target interconnection switch detects voltage or not, and if the voltage is not detected, controlling the target interconnection switch to be switched on according to the on-site ...

Method for preparing lithium iron phosphate precursor comprehensively from laterite type nickel ores

The invention discloses a method for preparing a lithium iron phosphate precursor comprehensively from laterite type nickel ores, which comprises: using an acid to fully leach out the laterite type nickel ores, and driving the Fe concentration in lixivium to between 0.01 and 6 mol/L; adding 0.01 to 9 mol/L oxidant and precipitator into the lixivium, using 0.01 to 6 mol/L of complexant or surfactant to control the appearance, and using 0.01 to 6 mol/L of aqueous alkali to control the pH value of the system to between 0.1 and 3; and performing reaction on the system in a stirring reactor at the temperature of between 20 and 90 DEG C for 5 minutes to 24 hours, washing and filtering the obtained deposit, drying the obtained product at the temperature of between 50 and 200 DEG C, and obtaining the precursor of a lithium iron phosphate anode material of a lithium ion battery. The invention has the characteristics of wide source of raw materials, simple technological process, good product quality ...

Electrochemical energy storage station battery liquid heat dissipation device

The invention relates to the technical field of electrochemical energy storage station batteries, in particular to an electrochemical energy storage station battery liquid cooling device which comprises a battery cooling supporting plate, two heat exchange plates, two high-density tooth cooling fins, a liquid pump and a controller. A liquid inlet pipeline, a liquid outlet pipeline and a first temperature sensor are arranged in the battery cooling supporting plate; the two heat exchange plates are respectively arranged on two sides of the battery cooling support plate, cooling pipelines are arranged on the heat exchange plates, two ports of the cooling pipelines are respectively connected with a liquid inlet pipeline and a liquid outlet pipeline, and the cooling pipelines, the liquid inlet pipeline and the liquid outlet pipeline form a cooling loop; the high-density tooth radiating fins are tightly propped against the heat exchange plate; the liquid pump is connected to the cooling loop; ...

Auxiliary method for screening premature and/or dwarf and/or high harvest index corn

The invention discloses a method for screening corn with precocity and/or short stems and/or high harvest exponent. The method for screening corns with precocity and/or short stems and/or high harvest exponent takes the deoxyribonucleic acid of the to be tested corn gene groups as the templates, and the polymerase chain reaction amplification is performed to the primers shown by the sequence two and the sequence three in the sequence table; the restriction enzyme of the obtained polymerase chain reaction products is performed with restriction end nuclease BssSI; if the restriction end nuclease BssSI can be opened by the polymerase chain reaction products, the to be tested corn is the corn with precocity and/or short stems and/or high harvest exponent. The method for screening corns with precocity and/or short stems and/or high harvest exponent of the invention can be selected in the early period of corn up-growth and the method has the advantages that the breeding speed is quickened, the ...

Belt type storing and conveying machine and method for storing and conveying gangue for underground heading face

The invention discloses a belt type storing and conveying machine and a method for storing and conveying gangue for an underground heading face. Upper carrier rollers and lower carrier rollers are arranged on a rack at intervals; rotary drums are arranged at the two ends of the rack; a pair of driving drums and tensioning drums are arranged below the rack; the driving drums are dragged by a driving device to rotate; vertical supports are fixedly connected to the two sides of the rack at intervals; material blocking plates are arranged on the vertical supports so as to enable groove-type spaces to be formed above the conveying belt; and the driving device is composed of a permanent magnet direct-current driving frequency conversion speed regulating motor and a frequency converter, wherein the motor is in rigid linkage with the driving rollers through elastic pin couplings. When the gangue is output from the heading face, the groove type spaces of the storing and conveying machine running ...

Consignment trolley for circuit breaker hydraulic mechanism

The invention discloses a consignment trolley for a circuit breaker hydraulic mechanism, and the consignment trolley comprises a consignment trolley body, the consignment trolley body comprises a top disc, a middle disc, a chassis and a split type hydraulic jack, the bottom of the chassis is provided with universal wheels, the middle disc is arranged right above the chassis, and the middle disc is rotatably connected with the chassis; a self-rotation power device used for driving the middle disc to rotate is arranged on the chassis, the split type hydraulic jack comprises an oil cylinder and a plurality of pump tops arranged at the top of the middle disc, the pump tops are all connected with the oil cylinder, the top disc is arranged over the middle disc, and the output ends of the pump tops are all connected with the lower surface of the top disc. And a plurality of laser distance measuring sensors are uniformly arranged on the periphery of the chassis. The carrying process is more convenient ...

Method for extracting nickel and cobalt by processing poor nickel laterite

The invention discloses a method for extracting nickel and cobalt by processing poor nickel laterite, which is to process poor nickel laterite by using a pre-reduction roasting-oxidizing leaching process and extracting valuable metals such as nickel and cobalt from the poor nickel laterite. By using poor nickel laterite as a starting material, the economic and high-efficiency extraction of the valuable metals such as nickel and cobalt, and the closed-loop circulation and comprehensive utilization of a metallurgical system are realized by the process steps of mineral treatment, high-temperature reduction roasting, weak acid oxidizing leaching, nickel and cobalt extraction from leachate, recovery of leaching agent and the like.

Method for preparing precursors of lithium titanate and lithium iron phosphate by comprehensively using ilmenite

The invention discloses a method for preparing precursors of lithium titanate and lithium iron phosphate by comprehensively using ilmenite, which comprises the following steps of: 1) separating the ilmenite, namely crushing the ilmenite, leaching the ilmenite with hydrochloric acid, filtering the ilmenite to obtain a residue and a filtrate; 2) preparing the precursor of the lithium titanate, namely washing the residue prepared by step 1) with the hydrochloric acid, adding the washed residue in aqueous alkali, cooking the mixture, filtering the mixture after cooling, and then adding the obtained filter residue in the hydrochloric acid, cooking the mixture, and filtering, washing, drying and calcining the mixture after cooling to obtain the precursor of the lithium titanate; and 3) preparing the precursor of the lithium iron phosphate, namely taking the filtrate prepared by step 1) as a raw material, adding iron powder to reduce ferric iron, diluting the reduced filtrate, adding a complexing ...

Titanium-based composite anode for manganese electrolysis and preparation method of titanium-based composite anode

The invention relates to a titanium-based composite anode for manganese electrolysis and a preparation method of the titanium-based composite anode. According to the invention, a titanium wire mesh is used as a framework, and the titanium wire mesh is combined with titanium foam to form titanium wire mesh reinforced foamed titanium to be used as a base body, the surface of the base is coated with one or more precious metallic oxide layers, and then a manganese dioxide layer is coated through pre-electrolysis, so that composite anode is obtained. According to the invention, the preparation process is simple, the prepared titanium-based composite anode solves the difficult problems of a traditional lead silver alloy anode that the anode potential is high and an anode by-product contains lead and is hard to use repeatedly, in addition, the problem that a traditional titanium-based modified anode is easily passivated in a manganese electrolysis system is also solved.

Method for preparing high purity phosphorus pentafluoride gas

The invention discloses a preparation method of high-pure phosphorus pentafluoride gas, which comprises: phosphorus pentoxide is put into a reaction container lined with PTFE and is introduced with anhydrous hydrogen fluoride, and the temperature is preserved to be minus 20 to 0 DEG C; according to the chemical reaction counting, the anhydrous hydrogen fluoride is overdosed by 50 to 60 percent; the reaction is carried out for 3 to 5 hours. After the reaction is completed, 60 percent of oleum is added in an intermittent way with stirring and the dosage of the oleum is 35 to 40 percent more than a theoretic value. The intermediate outcome of the reaction is heated for decomposing under the temperature of 120 to 150 DEG C so as to generate the phosphorus pentafluoride; the product is guided into a condenser for cooling the impurity and then the high-pure phosphorus pentafluoride is obtained. The content of PF<5> obtained by the method is greater than 99.9 percent, the content of impurity is ...

Automatic steel plate cutting robot

The invention discloses an automatic steel plate cutting robot. The automatic steel plate cutting robot comprises a support plate, electric motors, a flywheel and various rod pieces, wherein the support plate is formed by welding two rigid steel plates; an electric motor X is carried on the support plate and connected with a rod piece A; the rod piece A is connected with a rod piece B by a rotating shaft a; the rod piece B is connected with a rod piece E by a rotating shaft b; a rod piece C is connected with the rod piece E by a rotating shaft c; the rod piece E is embedded into a transverse rod piece D; and the flywheel is arranged at the leftmost end of the rod piece E and driven by an electric motor Y. The invention has the advantages that: the automatic steel plate cutting robot can meet the cutting requirements of different steel pieces, has a simple structure, small power and a small size, and is easy to disassemble and install.

Method for treating enrichment set in poor pin and extracting tin and other color metals

The invention relates to a method for treating an enrichment set in poor pin and extracting tin and other color metals. The method comprises the following steps of: drying and treating mineral aggregate; proportioning, mixing and pelletizing; adding a chlorinating agent and a reducing agent to the treated mineral powder in the poor tin and uniformly mixing; pelletizing; adding chlorinating agent 4-8 percent by weight of the powder and reducing agent which is 3-5 percent by weight of the powder; preheating and heating mineral aggregate pellets, heating the mixed mineral aggregate pellets in a preheated heater to rise the temperature within the limit that the collected heat of the mineral aggregate pellets is ensured to avoid causing a chemical reaction; chlorinating; volatilizing, roasting and putting the obtained hot mineral aggregate pellets in a chlorinated reactor for carrying out a chlorinating, volatilizing and roasting reaction of valuable metals at a roasting temperature of 800-1100 ...

Acid etching solution electrolyte circulation regeneration system

The utility model discloses a raw and other materials recovery unit, its technical scheme main points are: an acid etching solution electrolyte circulation regeneration system, includes that the waste liquid stores bucket, recovery unit, current control device and electrolysis jar, recovery unit passes through the pipe connection with the electrolysis jar, the electrolysis jar divide into cathode chamber and anode chamber by ion diaphragm with it, be provided with negative plate and anode plate in the cathode chamber and the anode chamber respectively, the negative plate and anode plate are connected with the current control device respectively, the system is also including the electrolyte circulation groove that has left and right cavity, right side cavity passes through pipeline circulation intercommunication with the cathode chamber, left side cavity passes through the pipe connection with the anode chamber. The scheme makes the spent solution regeneration utilization, has reduced the ...

Technological process for extracting nickel and cobalt and comprehensively developing iron and magnesium from laterite-nickel ore

The invention relates to a technical method for extracting nickel and cobalt from a lateritic nickel ore and comprehensively developing iron and magnesium and belongs to the field of wet metallurgy of nonferrous metals. The lateritic nickel ore is used as the raw material; the technical flows of mining, defibrination and ore preparation, wet chlorinating extraction under a normal pressure, separating the iron by extraction, neutralizing, hydrolyzing and depositing the nickel and cobalt, hydrolyzing magnesium chloride with a high temperature, etc., and the like, are adopted to extract the middle product of the nickel and cobalt, recycle the light magnesium chloride and the materials used for refining an iron product. The invention is mainly characterized in that the nickel and cobalt in the lateritic nickel ore is firstly and selectively dissolved and extracted by using the normal pressure muriatic acid; the iron is separated by extraction; a depositing method is used on the nickel and cobalt ...

Method for extracting lithium salt from salt lake bittern with low-magnesium-lithium ratio with calcium circulation solid phase conversion method

The invention relates to a method for extracting lithium salts from saline salt brine with a low magnesium-lithium ratio through a calcium cycling solid-phase conversion method. The method is to take the saline salt brine with the low magnesium-lithium ratio as a raw material and adopt the technological flows of brine concentration, magnesium and sulfur removal through lime cream, calcium separation through lithium carbonate, lithium extraction through sodium carbonate, thermal decomposition of calcium carbonate, hydration of quicklime into cream, and the like to extract lithium carbonate products. The main technical points of the method comprises that: the method is based on a solid-phase conversion principle of anions (OH, CO3) and realizes magnesium and calcium removal of the brine, purification of the lithium salts and closed cycle of calcium through solid-phase conversion of Ca(OH)2, Mg(OH)2, Li2CO3, Ca(OH)2, CaCO3, CaO, Ca(OH)2. The method comprehensively utilizes magnesium resources ...

Method for collecting nickel and cobalt from laterite-nickel ore lixivium

The invention discloses a method for separating enriched nickel and cobalt from a laterite nickel ore lixivium, which comprises the following steps: after solid and liquid separation between the laterite nickel ore lixivium and ore slag is implemented, a vulcanizing agent is added into the lixivium, the solid and the liquid are separated after reaction precipitation, and precipitated solid is washed by a new lixivium, thus obtaining sulfide precipitate; after the sulfide precipitate is pulpified, sulphuric acid and solution of nitric acid and mixed acid are added so as to implement oxidizing leaching; the goethite method is adopted for removing iron from a superior pickle liquor; a sodium thiosulfate solution is added so as to implement copper removing; a filtering liquor that is the enriched nickel and cobalt solution is obtained. Compared with the prior art, the method for separating enriched nickel and cobalt from the laterite nickel ore lixivium is implemented at normal temperature ...

Mine trackless transport engine

The invention relates to a mine trackless transport locomotive used for underground subsidiary transport, which comprises a pre driver chamber and a post driver chamber, a driving device, a battery, a load-bearing wheelbarrow, a hoist apparatus, a hydraulic system, an electrical control system, etc. A traction motor in the driving device and a hydraulic pump motor of the hydraulic system both adopt three-phase AC motors, which are provided with AC by the battery through a transducer. The electrical control system comprises of a programmable controller, the transducer, a speed and direction sensor, a pressure sensor, a photoelectric conversion isolation plate, a dashboard, a display board, an intrinsic safety power source, an explosion septal and intrinsic safe electric control box, etc. The traction motor of the trackless motor and the hydraulic pump motor adopt alternating current motors which have the advantages of light weight, small size, low price, convenient maintenance and wide application ...

Method for preparing nano-TiO2 serving as cathode material of lithium ion battery

The invention discloses a method for preparing nano-TiO2 serving as a cathode material of a lithium ion battery. The method comprises the following steps of: beating precipitates of titanium prepared from metatitanic acid or various titanium sources by using water, adding a coordinating agent into thick liquid according to a molar ratio of the coordinating agent to the titanium of 1.0:1-10:1, regulating the pH value to be between 7 and 14 by using alkali, reacting in a stirring reactor at the temperature of between 20 and 80 DEG C for 10 to 720 minutes, and filtering to obtain solution of the titanium; and adding the alkali into the solution according to a molar ratio of the alkali to the titanium of 1.0:1-50:1, heating the solution to between 80 and 200 DEG C for 10 to 600 minutes, filtering and washing to obtain a precursor of nano-TiO2, and calcining the precursor at the temperature of 120 and 850 DEG C for 0.5 to 20 hours to obtain the nano-TiO2 serving as the cathode material of the ...

Method for preparing powdery electrolytic manganese dioxide (EMD)

The invention discloses a method for preparing powdery electrolytic manganese dioxide (EMD). In the method, the powdery EMD is directly obtained from solution by improving the electrolytic process and controlling the electrolytic condition; and during electrolysis, a diaphragm electrolytic cell is adopted, a lead silver alloy plate or a titanium manganese alloy plate subjected to acid treatment is taken as an anode, and a graphite plate or a stainless steel plate is taken as a cathode. The method comprises the following steps of: preparing electrolyte with 0.1 to 10.0mol/L sulfuric acid and 0.4 to 1.2mol/L manganese sulfate, adding an active agent into the electrolyte, electrolyzing at the temperature of between 20 and 100 DEG C under the action of ultrasonic waves, and filtering to obtain the powdery EMD; and washing the powdery EMD for multiple times, adding a dispersing agent into solution when the powdery EMD is washed for the last time, and drying to obtain the powdery EMD. The method ...

Method for efficiently concentrating cobalt and nickel from low-grade nickeliferous laterite ore

The invention provides a method for efficiently concentrating cobalt and nickel from a low-grade nickeliferous laterite ore. The method is based on mine-phase reconstruction, and the ore is subject to physical treatment, high temperature chlorination and reduction roasting to convert the nickel and the cobalt in the ore from oxide or composite oxide (silicate and ferrite) mineral into magnetic metal or alloy, magnetic separation method or combined floatation-magnetic separation method is used for separation to concentrate the cobalt and the nickel. The method is used for treating the low-grade nickeliferous laterite ore (Ni is 0.2-2.0%), contents of the nickel ore concentrate is more than ten times of that of the crude nickel ore; and the nickel recovery is more than 80%.

PCB electroplating wastewater treatment system

The utility model discloses a PCB electroplating wastewater treatment system aims at providing the waste water after electroplating PCB and carries out the effluent disposal system that safety was discharged, and its technical scheme main points are, carry out the materialization processing system that discharges including being used for becoming biological water purification with the useless pretreatment of water of electrolysis, and be used for purifying into biological water purification the ion exchange clean system of the circulating water of no heavy metal, materialization processing system connects with ion exchange clean system is consecutive, materialization processing system processs and obtains not drinking daily water, ion exchange clean system processs and obtains the circulating water, through the technical solution, materialization processing system can become biological water purification with waste water treatment, biological water purification back up to standard, just ...

A method for making anode material LiFePO4 of lithium ion battery

The invention discloses a preparation method of lithium iron phosphate, a material for positive electrode of lithium ion battery. The preparation method comprises the steps that: ferric iron compound, phosphorus compound and lithium compound are taken as raw materials and mixed according to molar ratio of the contained iron, phosphorus and lithium 1:1:1; the obtained mixture is evenly mixed underroom temperature, and then mechanical activation is carried out; after 0.5-20 hours of activation, a reducing agent is added with the molar ratio of the reducing agent and the iron compound is 1:1-1:6; under normal temperature and pressure, the ferric iron is reduced by the reducing agent, so as to produce fine particles of LiFePO4 which is then sent into non oxidizing gas to be heated to 300-700DEG C and calcined for 2-20 hours under constant temperature; finally, the lithium iron phosphate is obtained. The preparation method of lithium iron phosphate adopts low-temperature method to process the ...

Aluminum oxide modified polymer electrolyte thin film and preparation method thereof

The invention provides an aluminum oxide modified polymer electrolyte thin film and a preparation method thereof. The preparation method comprises: mixing polyvinylidene fluoride (PVDF) and hexafluoropropylene (HFP) polymer with aluminum-iso-butoxide, polyvinyl pyrrolidone (PVP) and dimethylacetamide (DMAC), stirring to obtain uniform gel, standing, vacuumizing to remove air bubbles from the gel,uniformly coating the gel on a substrate, controlling temperature to volatilize solvent to obtain a film, namely the nano aluminum oxide modified PVDF-HFP/PVP polymer electrolyte thin film generated in situ. After being soaked in lithium salt solution ofcarbonate(EC)-dimethyl carbonate (DMC)-ethylmethyl carbonate (EMC) to be activated and plasticized, the polymer electrolyte thin film demonstrates high electrochemical performance. The polymer electrolyte thin film prepared by the invention has high mechanical strength, high flexibility, high ionic conductivity and high electrochemical performance ...

Shell-grade red illuminating material for lamp and preparing method

Nucleus-shell cathode emission material for fluorescent tube and its making method

The invention discloses a core-case cathode transmitting material of fluorescent lamp, which is characterized by the following: adopting (BaSrCa)CO3 powder as core and carbonic acid rare earth as casethrough solid powder method; setting the central grain size of core at 5-10um; increasing the using lift of fluorescent lamp and reducing the light decay of fluorescent lamp greatly; improving the product quality of the fluorescent lamp with little grain size for cathode transmitting material, large specific surface area and high activity.

Improved method for extracting alkali metal compound from solid fluorine reconstruction lepidolite

The invention discloses an improved method for extracting an alkali metal compound from solid fluorine reconstruction lepidolite. According to the method, calcium salt and sodium salt liquor or suspension liquid is used as a reconstruction assistant, the assistant and the lepidolite are subjected to high-temperature heat treatment after mixing, pelleting and drying to obtain clinker, the clinker is soaked in water to obtain an alkali metal salt compound, the compound is soaked in acid after residue filtering to recycle a solid fluorine reconstruction reagent, and a high-quality silicate material is produced. The method has the advantages that comprehensive utilization of lepidolite mineral resources is achieved, recovery rate of alkali metal such as lithium, rubidium and cesium is high, cyclic utilization of the solid fluorine reconstruction reagent is achieved, raw material utilization rate is high, production cost is reduced greatly and environment protection is facilitated.

NiCoCrAl-based alloys, powders, coatings and components

The invention comprises a nickel-based alloy, and the nickel-based alloy comprises at least (in wt%): cobalt (Co) 27.0% to 29.0%, chromium (Cr) 16.0% to 18.0%, aluminum (Al) 11.6% to 12.6%, yttrium (Y) 0.3% to 0.5%, iron (Fe) 4.0% to 5.0%, optionally tantalum (Ta) 0.6% to 0.8%, molybdenum (Mo) 0.4% to 0.6%, silicon (Si) 0.4% to 0.6%, the remainder being nickel (Ni).

Feeding device for haemostatic forceps production

The invention relates to the field of hemostatic forceps, in particular to a feeding device for hemostatic forceps production. Comprising a chain type conveying belt, a lifting table is arranged on one side of the chain type conveying belt, a pushing plate is arranged above the lifting table and located on one side of the chain type conveying belt, a feeding platform is arranged on the other side of the lifting table, and the feeding platform is in butt joint with a press machine. According to the invention, hemostatic forceps raw materials can be subjected to compression molding treatment efficiently.

Automatic monitoring control device and method for transformer and transformer respirator

The embodiment of the invention relates to an automatic monitoring control device and method for a transformer and a transformer respirator, the device is respectively connected with a first transformer respirator and a second transformer respirator, and the automatic monitoring control device comprises a first channel, a second channel, a third channel and a valve automatic switching control mechanism, the automatic valve switching control mechanism comprises a dehumidification exhaust switching assembly and a detection element, the detection element is arranged on the third channel, and the first channel and the second channel are in through connection with the third channel through piston switching. According to the device, the humidity data of the first channel or the second channel is detected through the detection element, and according to the humidity data, water vapor for dehumidifying silica gel particles in the transformer respirator is discharged and the other transformer respirator ...

Aluminum oxide modified polymer electrolyte thin film and preparation method thereof

The invention provides an aluminum oxide modified polymer electrolyte thin film and a preparation method thereof. The preparation method comprises: mixing polyvinylidene fluoride (PVDF) and hexafluoropropylene (HFP) polymer with aluminum-iso-butoxide, polyvinyl pyrrolidone (PVP) and dimethylacetamide (DMAC), stirring to obtain uniform gel, standing, vacuumizing to remove air bubbles from the gel, uniformly coating the gel on a substrate, controlling temperature to volatilize solvent to obtain a film, namely the nano aluminum oxide modified PVDF-HFP/PVP polymer electrolyte thin film generated in situ. After being soaked in lithium salt solution ofcarbonate(EC)-dimethyl carbonate (DMC)-ethylmethyl carbonate (EMC) to be activated and plasticized, the polymer electrolyte thin film demonstrates high electrochemical performance. The polymer electrolyte thin film prepared by the invention has high mechanical strength, high flexibility, high ionic conductivity and high electrochemical performance ...

Method for extracting valuable metals from laterite nickel mine with hydrochloric acid full-closed circulation method

A method for extracting valuable metals from laterite nickel ore on the basis of the hydrochloric acid fully-closed circulation method belongs to the field of non-ferrous metallurgy. Crushed laterite nickel minerals are taken as raw material and the technique comprises the following technological steps: chlorination-leaching; recovering iron (Fe) from leaching residue; extracting nickel (Ni) and cobalt (Co); spray-drying the mother liquor; and calcining. By leaching the laterite nickel minerals with a mixed solution of hydrochloric acid and metal chlorides as a leaching agent under the proper conditions of heating and pressurizing and further precipitating nickel and cobalt with a compound vulcanizing agent, the overall recovery rate of nickel and cobalt is high; the closed circulation of hydrochloric acid is realized while processing the laterite nickel minerals with water and hydrochloric acid, therefore, the method is environment-friendly by realizing the zero discharge of waste water ...

Chlorination segregation method for enriching nickel and cobalt from nickel laterite

The invention discloses a chlorination segregation method for enriching nickel and cobalt from nickel laterite, which comprises the following steps of: drying the laterite; blending, mixing and pelletizing: blending a chlorinating agent and a reducing agent into the treated nickel laterite, mixing and pelletizing, wherein the adding amount of the chlorinating agent is 5 to 10 percent of the mass of the laterite, and the adding amount of the reducing agent is 3 to 6 percent of the mass of the laterite; preheating the laterite balls, wherein the heating temperature ensures that the balls store heat and do not undergo chemical reaction; putting the heated mixed laterite balls into a chlorination segregation reactor, and performing chlorination segregation roasting of nickel and cobalt at thetemperature of between 900 DEG C and 1,100 DEG C; enriching the nickel and the cobalt by magnetic separation: directly performing water quenching and wet fine milling on the roasted balls; then enriching ...

Method for the preparation of high rate lithium ion capacitor battery cathode material by pyrolyzing asphalt at low temperature to cover graphite

The invention relates to a method for the preparation of high rate lithium ion capacitor battery cathode material by pyrolyzing asphalt at low temperature to cover graphite, belonging to the technical field of the preparation of energy storage material. The invention comprises the steps that: first, mixed solution containing graphitizing catalyst, water and alcohol is formulated, then graphite, asphalt powder and conductive agent are added therein for being mixed for several hours, the resultant mixture is dried in an atmosphere of the air, the asphalt is then pyrolyzed in an atmosphere of Ar or N2, and in the end, salpeter solution is used to remove the graphitizing catalyst by means of dissolution, and the high rate lithium ion capacitor battery cathode material with pyrolyzed asphalt covering the graphite is obtained by sufficient washing and drying. The cathode material obtained according to the method has the characteristics of high capacity and good high rate performance, is simple ...

Method for extracting valuable metals from laterite nickel mine with hydrochloric acid full-closed circulation method

The invention relates to a method for extracting valuable metals from laterite nickel ore on the basis of the hydrochloric acid fully-closed circulation method which belongs to the field of non-ferrous metallurgy. Crushed laterite nickel minerals are taken as raw material and the technique comprises the following technological steps: chlorination-leaching; recovering iron (Fe) from leaching residue; extracting nickel (Ni) and cobalt (Co); spray-drying the mother liquor; and calcining. By leaching the laterite nickel minerals with a mixed solution of hydrochloric acid and metal chlorides as a leaching agent under the proper conditions of heating and pressurizing and further precipitating nickel and cobalt with a compound vulcanizing agent, the overall recovery rate of nickel and cobalt is high; the closed circulation of hydrochloric acid is realized while processing the laterite nickel minerals with water and hydrochloric acid, therefore, the method is environment-friendly by realizing the ...

Contact resistance analysis method of cable intermediate joint and related device

The invention discloses a contact resistance analysis method of a cable intermediate joint and a related device, and the method comprises the steps: decomposing an original time domain signal into two-dimensional time frequency information through discrete wavelet transform (DWT), improving the performance of a local signal, improving the anti-noise performance of a subsequent prediction model, and still having good anti-noise capability for data with a large fluctuation range; the self-suggestion support vector machine model (SSVM) utilizes a non-iterative method to extract subsequent knowledge from a training stage, that is, knowledge is extracted from a second-class support vector, so that the situation that information obtained from the training stage in a test stage is a first-class support vector or a hyperplane position is avoided, misclassification and mislearning are avoided, and the prediction precision of the contact resistance is improved. Therefore, the technical problem of ...

Sterile sampling valve

The present invention relates to a sterile sampling valve used on production pipelines or tanks for fizzy drinks, such as beer, cola, fruit milk, etc in order to solve the technical problems existing in the prior art that the sterilization and the oxygen isolation of valve cavities can not be ensured as the sampling valves used food industry are always exposed in the air, the cleaning operation is complicated, etc. The sampling valve comprises a sampling valve body and a sampling valve jacket. The sampling valve body is movably sheathed in the valve jacket. The valve jacket is divided into an upper cavity and a lower cavity by the valve body, wherein the lower cavity is sealed, and the upper cavity is open. As the sampling valve body is arranged in the valve jacket rather than directly exposed in the external environment, samples taken are effectively protected from pollution. Besides, the immersion of the sampling valve body in a sterilizing agent performs the double functions of sterilization ...

Automatic inspection and maintenance system for cable trench

The invention discloses an automatic inspection and maintenance system for a cable trench. The automatic inspection and maintenance system comprises a horizontal sliding rail, a fixed bracket, a detection assembly and an energy storage assembly, two ends of the fixed bracket are fixedly connected with two side walls of the cable trench respectively; the horizontal sliding rail is fixed below the fixed bracket; the detection assembly comprises a supporting frame, a sliding motor, a vertical telescopic rod, a connecting ball, a horizontal telescopic rod, a detection ball and an electric connector. The supporting frame is arranged on the horizontal sliding rail in a sliding mode. The sliding motor is arranged on the supporting frame and is in transmission connection with the supporting frame; the second end of the vertical telescopic rod is connected with the connecting ball; a connecting bin is arranged in the connecting ball; a power connection head is arranged in the connection bin; the ...

Method for producing battery-grade ferrous oxalate by using ferrous sulfate as titanium pigment byproduct

The invention discloses a method for producing battery-grade ferrous oxalate by using ferrous sulfate as a titanium pigment byproduct. The waste and byproduct ferrous sulfate is dissolved in deionizedwater; the mixture is filtered; a complexing agent, a surfactant and a precipitation agent are added according to a certain order into the filtrate when violent stirring is carried out; then, aqueoussolution of alkaline or acid is used for controlling the pH of the system to be 0.1-5.0, the stirring is not stopped until reaction is carried out at temperature of 20-80 DEG C for 5 min-4 h, aging is carried out for 0-24 h; the obtained sediment is filtered, washed and dried so as to obtain the battery-grade ferrous oxalate, wherein the iron recovery rate can be as high as 99.9 percent. By adjusting the addition order and the addition amount of the additives as well as the pH value of the system, the method causes the types and the amount of metallic elements in the ferrous oxalate to be controllable ...

Method and system for predicting long-period dynamic current-carrying capacity of bare cable

The invention discloses a long-period dynamic current-carrying capacity prediction method and system for an exposed cable, and the method comprises the steps: obtaining the temperature data of a real-time environment where the exposed cable is located, building time sequence models corresponding to a trend term and a season term based on a Prophet model, and carrying out the training, thereby achieving the prediction of the long-period dynamic current-carrying capacity of the exposed cable. The method comprises the following steps: obtaining trained time sequence models corresponding to a trend term and a season term, adding the trained time sequence models corresponding to the trend term and the season term to obtain an environment temperature prediction model, and performing difference processing according to a cable surface measuring point temperature and an environment temperature which are obtained in advance at a future preset moment to obtain an environment temperature prediction ...

Method for preparing high voltage lithium ion battery positive electrode material lithium-nickel-manganese-oxygen

The present invention belongs to the field of material preparing technology, and is especially preparation process of positive electrode material LiNi0.5Mn1.5O4 for lithium ion cell. The preparation process includes: mixing nickel source compound, manganese source compound and lithium source compound in the stoichiometric ratio, heating the mixture in a furnace in air or oxygen atmosphere in the heating rate of 0.1-100 deg/min, calcining at 700-1000 deg.c for 0.1-48 hr, and cooling to room temperature to obtain the positive electrode material LiNi0.5Mn1.5O4. The process is simple, easy to control and suitable for industrial production, and the prepared positive electrode material has high physical and chemical performances.

Lithium ion battery anode material and preparation method thereof

The invention discloses a lithium ion battery anode material. The molecular formula of the lithium ion battery anode material is Li2TiSiO5 and Li2TiSiO5 and belongs to a P4/nmm spatial point group; the lithium ion battery anode material adopts the structure of a sphere and the diameter of the sphere is 0.1-5 [mu]m. A preparation method for the lithium ion battery anode material comprises the following steps: 1), dissolving a titanium source, a silicon source and soluble lithium salt into a solvent to prepare into a mixed solution; 2), adding a complexing agent into the mixed solution; and adjusting the pH value to 8.0-11.5; 3), atomizing the mixed solution treated through the step 2), jetting into a microwave heating device for drying under current-carrying of current carrying gas so as to obtain a precursor; 4), roasting the precursor in inert atmosphere at the temperature of 500-950 DEG C so as to obtain the lithium ion battery anode material. The prepared lithium ion battery anode material ...

Rich-lithium-manganese-based cathode material used for lithium ion battery of hollow structure and preparation method thereof

The invention discloses a rich-lithium-manganese-based cathode material used for a lithium ion battery of a hollow structure and a preparation method thereof. The molecular formula of the rich-lithium-manganese-based cathode material is Li<1 + x>[NiCoMn<(1 - a - b)>]<1 - x>O<2>, wherein 0.1[NiCoMn<(1 - a - b)>]<1 - x>O<2> is of the hollow structure. The preparation method comprises the steps of preparing raw materials, preparing precursors, conducting calcination, and obtaining the rich-lithium-manganese-based cathode material. The rich-lithium-manganese-based cathode material has good rate performance and good cycling performance, the preparation process of the rich-lithium-manganese-based cathode material is simple, the cost is low, and the application prospect is wide.