500 results about "Ferromanganese" patented technology

The invention discloses a modified carbon-coated sodium manganese ferric phosphate pyrophosphate / sodium ferric phosphate pyrophosphate positive electrode material as well as a preparation method and application thereof, and relates to the technical field of new energy materials. The preparation method comprises the following steps: preparing MnFe-MOF from a manganese source, a first iron source and a first organic ligand under a hydrothermal reaction; a second iron source, the MnFe-MOF and a second organic ligand are subjected to a hydrothermal reaction, and MnFe-MOF / Fe-MOF is obtained; uniformly mixing with a sodium source and a phosphorus source, and sintering to obtain a positive electrode material; and carrying out high-temperature gas-phase etching treatment to obtain the fluorine-doped carbon-coated modified sodium manganese ferric phosphate pyrophosphate / sodium ferric phosphate pyrophosphate positive electrode material. The material disclosed by the invention has a coating modified structure, so that an interface side reaction caused by direct contact between sodium ferromanganese phosphate and an electrolyte can be effectively avoided, a manganese dissolution phenomenon is reduced, and the structural stability of the material is improved; and meanwhile, the material has high conductivity, excellent structural stability, excellent long cycle life and excellent rate capability.

The invention discloses a direct-current hollow electrode hydrogen plasma furnace mineral powder smelting system and method and application, and belongs to the technical field of hydrogen metallurgy. The system comprises a hollow electrode gas powder injection hydrogen plasma gun system, a direct current bottom electrode ore-smelting electric furnace system, a fine ore and hydrogen supply system and the like. The hollow electrode and the furnace bottom electrode form a direct-current arc, hydrogen carrying mineral powder is sprayed into an arc area to generate high-temperature hydrogen plasma, mineral powder reduction is achieved, and metal and slag are separated. According to the method, hydrogen serves as a reducing agent, carbon emission is reduced, the reaction efficiency is high, energy consumption is low, and the method can be used for steelmaking, smelting of micro-carbon ferromanganese and titanium slag and recovery of valuable metal in nonferrous smelting waste slag and has good green metallurgy application prospects.

The invention discloses a carbon-loaded high-entropy oxide and a preparation method thereof, the carbon-loaded high-entropy oxide is of a core-shell structure formed by coating carbon with a high-entropy oxide, and the high-entropy oxide comprises at least five metal elements of chromium, manganese, iron, cobalt, nickel and copper. The carbon-loaded high-entropy oxide has the advantages of low density, high dielectric loss and excellent wave-absorbing performance, and is expected to be widely applied to electromagnetic absorption and elimination in the fields of electronics, communication civil affairs and aerospace military.

The invention relates to the technical field of electrode materials, and discloses a preparation method of a lithium iron manganese phosphate material and a lithium ion battery. The lithium iron manganese phosphate material is prepared by the following steps: performing in-situ growth in a cavity of polyethylene glycol-sucrose hybrid aerogel with a three-dimensional porous network structure to form a manganese iron phosphate precursor; the hybrid aerogel can control excessive agglomeration and disordered growth of ferromanganese phosphate precursor particles and avoid particle agglomeration, so that the finally formed lithium ferromanganese phosphate material particles are finer and more uniformly distributed, and an amorphous carbon-aluminum layer is formed during later calcination, so that the performance of the material is improved. The surface of lithium manganese iron phosphate particles is tightly coated with the composite material, electron transmission can be accelerated, particle pulverization can be reduced, meanwhile, corrosion of corrosive components in electrolyte can be inhibited, interface side reactions such as transition metal ion dissolution can be reduced, and finally the conductivity and cycling stability of the lithium ion battery are remarkably improved.

The application relates to a method for smelting high-manganese steel in a converter, and belongs to the technical field of steelmaking. The technical problem to be solved by the application is that the manganese content of end-point molten steel produced by a converter in the prior art is low. The technical solution provided by the application for solving the above technical problem is that carbon balls and high-carbon ferromanganese are added in stages according to oxygen supply amount in the smelting process of the converter, when the oxygen supply amount is within 0-10% and 10-80%, 30% and 70% of manganese alloy are respectively added; and when the oxygen supply amount is within 0-10%, 10-50%, 50-80% and 80-100%, 20%, 40%, 30% and 10% of carbonaceous raw materials are respectively added. Compared with the current process for producing high-manganese steel in a converter, the application reduces the investment of alloy heating furnaces and other equipment, meets the production requirements of more varieties of high-manganese steel, improves the metal yield of manganese, shortens the production cycle, and reduces the production cost of high-manganese steel.

The invention discloses a process for separating and recycling scandium, manganese and iron in iron-manganese slag, and belongs to the technical field of metallurgical engineering and comprehensive utilization of secondary resources. The method comprises the following steps: crushing the iron and manganese slag, mixing the crushed iron and manganese slag with a chlorinating agent and a molten salt medium, and carrying out chlorination reaction at 600-850 DEG C, so that iron and manganese are converted into chlorides to volatilize, and scandium is enriched in the slag; the volatile gas is subjected to multi-stage gradient condensation, and manganese and iron concentrates are respectively recovered in different temperature intervals; and leaching-extracting the chlorination residues to obtain a scandium-rich substance. According to the method, source separation and collaborative recovery of iron, manganese and scandium are achieved through pyrogenic process chlorination-condensation, the problems that in a traditional wet process, metal interferes with one another, the process is long, and pollution is heavy are solved, and the method has the advantages of being short in process, small in pollution and high in recycling degree.

The invention relates to the technical field of lithium ion batteries, and discloses a positive electrode material and a preparation method thereof, and a lithium ion battery, the preparation method comprises the following steps: (1) mixing a phosphorus source, a manganese source and water, carrying out primary grinding, and then mixing with an oxidizing agent or a reducing agent for reaction; (2) mixing the product obtained in the step (1) with an iron phosphate solution, controlling the temperature of a mixed system to 70-100 DEG C, washing, drying for the first time and calcining for the first time to obtain an iron phosphate coated manganese iron phosphate precursor; and (3) mixing the iron phosphate coated ferromanganese phosphate precursor obtained in the step (2) with a lithium source, a carbon source and a doping element M source, and then carrying out secondary grinding, secondary drying and secondary calcination. By adopting the preparation method disclosed by the invention, the iron phosphate is better precipitated on the phosphate radical-manganese compound, so that the positive electrode material with better coating effect and better performance parameters is obtained, and meanwhile, the dissolution of Mn < 3 + > can be effectively inhibited by coating.

The invention discloses a manganese iron oxalate precursor, a lithium manganese iron phosphate material and a preparation method and application of the manganese iron oxalate precursor and the lithium manganese iron phosphate material, and belongs to the technical field of battery materials. The lithium manganese iron phosphate material core layer is prepared by taking the oxalate manganese iron precursor with a specific particle size range, particle size distribution uniformity and a specific structure as a raw material, and meanwhile, the shell layer comprising the ionic conductive agent and carbon is introduced outside the core layer, so that the comprehensive performance of the lithium manganese iron phosphate material can be effectively improved; and thus, the capacity, the cycle performance and the first charge-discharge efficiency of the prepared corresponding secondary battery are improved.

The invention provides a ferromanganese-based NH3-SCR (selective catalytic reduction) denitration catalyst as well as a preparation method and application thereof. The ferromanganese-based NH3-SCR denitration catalyst is obtained through a reaction of Mn salt, Fe salt and Pr salt. The molar ratio of Mn to Fe is (1: 0.69)-(1: 0.71); and the molar ratio of Mn to Pr is (1: 0.05)-(1: 0.25). The preparation method of the ferromanganese-based NH3-SCR denitration catalyst comprises the following steps: providing Mn salt, Fe salt and Pr salt; wherein the molar ratio of Mn to Fe is (1: 0.69) to (1: 0.71); the molar ratio of Mn to Pr is (1: 0.05)-(1: 0.25); the Mn salt, the Fe salt and the Pr salt are subjected to a reaction, and the ferromanganese-based NH3-SCR denitration catalyst is obtained. In flue gas denitration, the catalyst has good sulfur resistance and water resistance and excellent low-temperature catalytic activity.

The invention provides an amorphous carbon coated lithium manganese iron phosphate positive electrode material and a preparation method and application thereof, the preparation method comprises the following steps: mixing a lithium source, a ferrous source, a manganese source, a phosphorus source, a carbon source and a solvent to obtain mixed slurry; carrying out spray drying treatment on the mixed slurry, and carrying out plasma treatment on the obtained dried material to obtain a precursor material; and mixing the precursor material with a boron source, and sintering to obtain the amorphous carbon coated lithium iron manganese phosphate positive electrode material. The surface of the lithium manganese iron phosphate positive electrode material is coated with the amorphous carbon layer, the bonding strength of the amorphous carbon coating layer and the positive electrode material is high, the problem of electronic conductivity of the lithium manganese iron phosphate positive electrode material is solved, and meanwhile, the ionic conductivity of the material is improved through boron doping.

The invention discloses a cerium-zirconium-based high-entropy oxide as well as a preparation method and application thereof. According to the cerium-zirconium-based high-entropy oxide, cerium and zirconium serve as main bodies, and meanwhile rare earth elements (lanthanum, praseodymium, neodymium and samarium) and transition metal elements (manganese, iron, cobalt, nickel, copper and zinc) are introduced to form a high-entropy solid solution with the equal molar ratio and containing 3-8 kinds of metal. In the cerium-zirconium-based high-entropy oxide, the cerium element and the zirconium element respectively account for 20%-40% of the total amount, and the other elements are respectively 10%-30% in an equimolar ratio. The cerium-zirconium-based high-entropy oxide catalyst prepared by the invention has excellent oxygen storage and release capacity and CO oxidation capacity, and the CO complete conversion temperature is 181 DEG C. The method adopts a simple coprecipitation process, is mild in condition and low in cost, and is suitable for large-scale application in the field of tail gas purification.

A composite lithium manganese iron phosphate positive electrode material, and a preparation method therefor and a use thereof. The composite lithium manganese iron phosphate positive electrode material comprises a lithium iron phosphate core (1), and an iron phosphide intermediate layer (2) and a composite coating layer sequentially stacked on the surface of the lithium iron phosphate core (1), the composite coating layer comprising a lithium manganese iron phosphate material (3) coated with a carbon material (4). A unique structural design enables the positive electrode material to have excellent electrochemical performance.

An etching method includes: an etching step of bringing an etching gas containing an etching compound into contact with a member to be etched (400) having an etching object (carbon material) subject to etching by the etching gas, plasm etching the etching object, and forming a hole in the etching object. The etching compound is fluoro-dithiethane represented by Chemical Formula CxFyS2, wherein, in Chemical Formula, x is 2 or more and 6 or less and y is 4 or more and 12 or less. The etching gas contains or does not contain at least one type among sodium, magnesium, aluminum, potassium, calcium, chromium, manganese, iron, cobalt, nickel, copper, and molybdenum, and, when the at least one type of metal is contained, the total concentration of all types of the metals contained is 100 ppb by mass or less.

The invention discloses a method for efficiently separating manganese, iron and aluminum in manganese oxide leachate step by step and efficiently recovering manganese, iron and aluminum, which comprises the following steps: by taking manganese dioxide and manganese slag leachate as a raw material, adjusting the acidity pH of the solution to be 1-2, adsorbing and removing iron ions by using resin, then adjusting the pH of the solution to be 2-4, and adsorbing and removing aluminum by using resin. And finally, extracting and separating to obtain a manganese-containing solution. Iron and aluminum on the chelate resin can be desorbed by hydrochloric acid, and the resin can be recycled. According to the method, manganese, iron and aluminum in the manganese oxide residue leaching solution are effectively separated and recycled through combination of ion exchange and an extraction method, manganese ions are selectively separated from the solution, separation of manganese from impurity elements such as aluminum and iron is achieved, the content of the impurity elements such as iron and aluminum in the manganese solution is reduced, damage of a traditional precipitation method to manganese is avoided, and the method is suitable for industrial production. The purity of manganese is integrally improved, and technical support is provided for preparation of high-purity manganese. Meanwhile, iron and aluminum elements in the solution can be effectively recycled.

The invention discloses a semi-solid die-casting high-strength and high-conductivity aluminum alloy and a die-casting method thereof, and relates to the technical field of semi-solid die-casting aluminum alloys, and the aluminum alloy comprises the following components in parts by weight: 3.86 to 4.32 percent of silicon, 0.24 to 0.32 percent of magnesium, 0.35 to 0.45 percent of copper, 0.42 to 0.56 percent of manganese, 0.26 to 0.38 percent of iron, 0.07 to 0.09 percent of zinc, 0.30 to 0.40 percent of molybdenum, 0.18 to 0.22 percent of strontium, 0.05 to 010 percent of yttrium, 0.03 to 0.05 percent of scandium and the balance of aluminum. The die casting method of the aluminum alloy comprises the steps of raw material smelting, degassing, stirring vibration, die casting, heat treatment and the like. The problems that an existing aluminum alloy is poor in casting fluidity, and a semi-solid die-casting aluminum alloy with high strength and high thermal conductivity cannot be obtained are solved, the tensile strength of the semi-solid die-casting aluminum alloy obtained through the formula and the technology is not lower than 314 MPa, the yield strength is not lower than 263 MPa, the thermal conductivity is not lower than 182 W / (m.K), and the service life of the semi-solid die-casting aluminum alloy is prolonged. And the requirements and application of high-strength and high-thermal-conductivity aluminum alloy parts required in the fields of communication, automobiles, electronic appliances and the like are met.

The invention relates to the technical field of metal casting, and discloses a smelting and casting method of a high-toughness regenerated aluminum alloy, which comprises the following steps: measuring the iron content of a regenerated aluminum melt, regulating and controlling the manganese-iron ratio, heating the melt to 750-790 DEG C, and carrying out overheating treatment to eliminate a hereditary core; cooling to 630-645 DEG C, applying a mechanical shear flow field with the average shear rate not lower than 60s <-1 > in the interval, stripping a diffusion boundary layer on the surface of the iron-rich phase crystal nucleus by utilizing fluid drag force, breaking dendritic crystals, and separating out in a polyhedral or spherical manner; according to the method, through active intervention of a critical shear flow field, the problem of needle-like growth of an iron-rich phase caused by solute diffusion blocking in a traditional technology is solved, in-situ generation of the harmless iron-rich phase in the high-iron-content secondary aluminum is achieved, the obdurability of a die casting is improved, and dependence on the purity of raw materials is reduced.

The invention discloses a water taking and ferromanganese removal device based on a seepage collecting gallery, and belongs to the technical field of ferromanganese removal of seepage collecting galleries, the water taking and ferromanganese removal device comprises a seepage collecting gallery main body, an aeration assembly and a vibration piece, a gabion is installed on the upper surface of the seepage collecting gallery main body, the aeration assembly is installed inside the gabion, and the vibration piece is installed on the upper surface of the seepage collecting gallery main body. According to the manganese ore catalytic oxidation device, external gas enters the aeration ball through the air inlet cover, the connecting pipe and the aeration pipe, and the gas is extruded through a microporous material of a bubble film to form microbubbles, so that the content of dissolved oxygen in a water body is greatly increased, a sufficient oxygen source is provided for a manganese ore catalytic oxidation reaction, and the gas-liquid mass transfer effect is enhanced; meanwhile, the other part of gas enters the spherical shell and blows the vibration ball to drive the vibration rod to swing, the impact ball impacts the vibration piece through the connecting block and the connecting rod and then is transmitted to the aeration ball to enable the aeration ball to swing greatly, a water body generates turbulent flow, and the contact area and frequency of pollutants and manganese ore are increased.

The invention discloses a preparation method and application of high-compaction type lithium manganese iron phosphate. Two different (Mn + Fe) / P ferromanganese phosphate are selected as precursors to prepare the lithium ferromanganese phosphate, a yellow material prepared from each precursor is sintered at two different temperatures, and the obtained black material is graded for multiple times and subjected to secondary sintering to finally obtain the high-compaction type lithium ferromanganese phosphate. The whole preparation process is simple, compatible with an existing iron-lithium production line, free of material waste, short in synthesis period, free of multi-step sintering, capable of effectively reducing cost and suitable for large-scale application and popularization.

According to the method for recycling, upgrading and regenerating the lithium iron manganese phosphate from the waste lithium iron phosphate positive electrode material, the waste lithium iron phosphate is leached through a hydrogen peroxide and sulfuric acid system catalyzed by manganese ions, and the acid leaching efficiency is improved. Meanwhile, manganese ions subjected to acid leaching are used as a manganese source to generate a lithium manganese iron phosphate precursor, and finally the high-performance lithium manganese iron phosphate positive electrode material is synthesized. The method is simple in process, low in cost and suitable for large-scale industrial production.

The invention provides a ferromanganese phosphate precursor and a preparation method and application thereof, and belongs to the technical field of lithium ion batteries, the preparation method of the ferromanganese phosphate precursor comprises the following steps: S1, uniformly mixing a manganese source, an iron source, a phosphorus source, a complexing agent, an oxidizing agent and water, and regulating the pH value to 2-3 to obtain an electrolyte solution; s2, the electrolyte solution is placed in a microwave transmission type reaction tank, pulse potential and microwave radiation are applied, and an electro-deposition reaction is carried out; a working electrode, a platinum counter electrode and a saturated calomel reference electrode are arranged in the permeation type reaction tank; the working electrode comprises a titanium-based current collector and a conductive MOF film coated on the titanium-based current collector; and S3, after deposition is completed, the working electrode is taken out and washed, roasting treatment is conducted in the nitrogen atmosphere, and the ferromanganese phosphate precursor is obtained through air jet pulverization. According to the method, uniform codeposition of the ferromanganese phosphate is realized, and the prepared ferromanganese phosphate precursor is uniform in element distribution, high in tap density and low in impurity content.

The present invention provides a lithium iron manganese phosphate material and a preparation method thereof. The preparation method comprises step S1, sand-milling raw materials including an iron source, a first manganese source, a second manganese source, a third manganese source, and a phosphorus source to obtain a sand-milled material; step S2, mixing the sand-milled material with a carbon source to obtain a mixture; step S3, spraying the mixture to obtain a spray material, and mixing the spray material with a lithium source to obtain a mixed lithium yellow material; step S4, heat-treating and pulverizing the mixed lithium yellow material in an inert atmosphere to obtain a lithium iron manganese phosphate material; wherein the first manganese source is an inorganic water-soluble manganese compound, the second manganese source is an organic manganese source, and the third manganese source is a manganese oxide. The preparation method of the present application not only has low requirements for a sand mill, but also does not generate high energy consumption as in a two-step process. That is, the preparation method and equipment of the lithium iron manganese phosphate material of the present application are simple, cost-effective, and more conducive to industrial large-scale production.

The invention discloses a method for testing the ratio of manganese to iron in a battery, and belongs to the technical field of lithium manganese iron phosphate batteries. The method for testing the ferromanganese ratio in the battery comprises the following steps: acquiring OCV-SOC data of the battery, and obtaining a discharge curve according to the OCV-SOC data; fitting the discharge curve to obtain a fitting function curve; and according to the inflection point of the fitting function curve, calculating to obtain the manganese-iron ratio of the battery. According to the method for testing the manganese-iron ratio in the battery provided by the invention, based on the convenience and quickness of electrochemical testing, the test of the manganese-iron ratio is converted into an electrochemical method from a traditional chemical method, that is, the manganese-iron ratio is calculated and estimated according to the response result of the electric signal; according to the method, nondestructive, low-cost, convenient and fast manganese-iron ratio estimation can be realized only by acquiring and analyzing the OCV-SOC data of the battery, and meanwhile, the accuracy of a result is ensured.

A process for the recovery of valuable metals from oxide minerals, particularly polymetallic nodules, is disclosed. The process is suitable for the recovery of Cu, Co, Ni, Fe, and Mn, which are the main metals of interest in these polymetallic nodules. Among other features, the present process is characterized by the handling of Fe, which is dissolved and retained in solution until the crystallization stage instead of being removed in an earlier stage. A mixed Mn-Fe residue is obtained, which, after heat treatment, yields a Mn-Fe oxide suitable for the steel or manganese industries. Excellent yields of Cu, Co, and Ni are obtained, while the Fe is leached and recovered along with the Mn.

The invention provides a preparation method of a ferromanganese phosphate precursor and a lithium ferromanganese phosphate positive electrode material, and the preparation method of the ferromanganese phosphate precursor comprises the following steps: S1, sequentially crushing, grinding and screening a ferromanganese alloy to obtain ferromanganese alloy powder; s2, the ferromanganese alloy powder is roasted and crushed in the oxygen atmosphere in sequence, and ferromanganese oxide powder is obtained; and S3, mixing the ferromanganese oxide powder and a phosphoric acid solution, carrying out a hydrothermal reaction, drying, dehydrating, and crushing to obtain the ferromanganese phosphate precursor. The ferromanganese phosphate precursor is prepared from the ferromanganese alloy, additional manganese source and iron source compounds do not need to be introduced, the product uniformity and stability are good, and the cost is lower. According to the invention, the atomic-level uniform dispersion of manganese and iron elements in the ferromanganese precursor is realized, the problem of dissolution of manganese is avoided, and the structural stability and electrochemical performance of the material are improved. The method is easy to industrialize.

The utility model relates to the technical field of chemical production, in particular to lithium manganese iron composite salt production equipment which comprises a supporting shell, the feeding hopper is arranged on the outer side of the top end of the supporting shell and connected with the supporting shell through a connecting frame; the discharging pipe is fixedly connected to the outer side of the bottom end of the supporting shell; the supporting assembly is arranged on the outer side of the discharging pipe and connected with the supporting shell; the reaction mechanism is arranged on the inner side of the supporting shell and is connected with the supporting shell; wherein the reaction mechanism comprises material storage assemblies, overturning assemblies and stirring assemblies, the material storage assemblies are arranged on the inner side of the supporting shell in a central symmetry mode and connected with the inner wall of the supporting shell through the overturning assemblies, the stirring assemblies are arranged on the inner sides of the material storage assemblies, and the stirring assemblies are connected with the material storage assemblies. Multiple stirring of raw materials can be realized, continuous production of ferrous sulfate reaction liquid can be realized, and the production efficiency is greatly improved.

The invention discloses a preparation method of ferromanganese carbonate for a lithium battery, and relates to the technical field of battery materials. The method comprises the following steps: under the protection of an antioxidant and an inert atmosphere, preparing a mixed metal salt solution from manganese salt and ferrous salt, mixing the mixed metal salt solution with a solution containing carbonate ions, carrying out a co-precipitation reaction, and controlling the reaction temperature, the pH value, the dropwise adding rate, the reaction time and the molar ratio of the manganese salt to the ferrous salt; and filtering, washing and drying the obtained product ferromanganese carbonate in sequence to finally obtain the required battery material ferromanganese carbonate. The method for preparing the ferromanganese carbonate is stable, high in yield and convenient for industrial production, and a product which is uniform in morphology, stable in iron-manganese ratio at 4: 6 and uniform in metal ion distribution can be obtained.

The application discloses a high-carbon ferromanganese iron powder remelting process, which comprises the following steps: step one, pickling: high-carbon ferromanganese iron powder is subjected to pickling under the action of a pickling solution, so that a surface oxide layer is removed, and deoxidized ferromanganese iron powder is obtained; and step two, ultrasonic cleaning: the deoxidized ferromanganese iron powder obtained in step one is added into an ultrasonic cleaning machine for cleaning, so that surface stains and grease are removed. After preheating and degassing, nitrogen and oxygen of the ferromanganese sintered block are detected, and ingredients are prepared according to the nitrogen content, so that the ingredient amount is more reasonable, and the quality of the high-carbon ferromanganese alloy is improved. Moreover, the deoxidized skin of the high-carbon ferromanganese iron powder is removed outside the furnace, so that the deoxidized skin does not need to be removed by using a lossy reagent covering agent in the furnace, the alloy is less damaged, and the ferromanganese burning loss is reduced. As a result, the formed manganese oxide slag is less, the quality of the high-carbon ferromanganese finished product is greatly improved based on the above two points, the chemical composition of the high-carbon ferromanganese finished product is uniform, and the prepared high-carbon ferromanganese alloy has higher hardness and toughness.

The application discloses doped modified manganese iron phosphate with a nanoporous structure, a preparation method and application thereof. 1‑a‑b Fe a M b PO4, 0.01<=a<=0.98, 10 ‑4 <=b<=10 ‑2 M is a combination of one or more selected from magnesium, titanium, vanadium, chromium, cobalt, nickel, zinc, gallium, aluminum, zirconium, niobium, molybdenum, tin, antimony, calcium, barium, strontium, boron, ruthenium, silicon, tellurium, copper and lithium, and the particle size is below 50 nm, and the material also has a porous structure. The material can be used for preparation of lithium manganese iron phosphate positive electrode materials in lithium ion batteries, and the specific capacity, rate and cycle performance of the obtained positive electrode materials are improved.

The invention provides a preparation method of a high-wear-resistance alloy lining plate, and relates to the technical field of wear-resistance alloys, carbon steel and pig iron are mixed, heated and melted, high-carbon ferromanganese, medium-carbon ferrochrome and ferrosilicon are added, heating refining is carried out, aluminum powder is added, the mixture is put into a mold, cooling and demolding are carried out, heating homogenization, quenching and cooling are carried out, and a mother plate is prepared; mixing bismaleimide, the composite powder and sepiolite fibers, heating and stirring, coating a mother board with the mixture, firstly applying negative pressure, then applying positive pressure, heating and cooling to obtain a substrate layer; and placing the mother board in magnetron sputtering equipment, sputtering on the substrate layer to obtain a chromium nitride functional layer, and cooling to obtain the high-wear-resistance alloy lining board. The composite powder is prepared by mixing and heating chromium carbide powder and a hydrogen peroxide solution, filtering, mixing with an ethanol solution and gamma-aminopropyltriethoxysilane, heating, condensing and refluxing, washing and drying, and mixing and heating with amine-terminated polyether and N, N-dimethylformamide. The wear-resistant stability of the alloy lining plate can be improved.

The application relates to the field of wastewater treatment catalysis, and discloses a Fe-Cu-Mn ternary hydrotalcite-like catalyst and a preparation method thereof, which comprises iron, copper and manganese; the iron, copper and manganese are distributed in the layer plate metal central site in an atomic dispersion mode; the layer plate oxygen octahedron is in a non-symmetrical stretching distortion state; a 3.2-4.8 degree deviation is generated in the manganese oxygen copper bond angle in the layer plate; the lattice parameter a of the layer plate 110 crystal face direction is 0.305-0.312 nm; the molar ratio of copper to manganese is 1:2-1:5; and the molar sum of copper and manganese to the molar ratio of iron is 2:1-4:1. According to the application, the lattice non-symmetrical distortion induces the space overlap of the auxiliary metal and the iron active center orbit, an electron transfer path is constructed, the shielding effect of the hydroxyl ion on the iron active site under the alkaline environment is eliminated, the catalytic site activity is maintained, and stable and efficient catalytic treatment under wide pH working conditions is realized.