180 results about "Diiron Trioxide" patented technology

The invention discloses a thermal insulation material with enhanced thermal insulation performance and a processing method, and relates to the technical field of thermal insulation material processing. Comprising the following components in parts by weight: 100 to 200 parts of a nanopore matrix material, 20 to 120 parts of expanded perlite, 10 to 350 parts of polystyrene, 30 to 300 parts of polyurethane, 100 to 500 parts of nano titanium dioxide, 10 to 60 parts of graphene, 10 to 40 parts of silica sol and 1 to 55 parts of ferric oxide. A multi-stage pore structure is constructed through a nanopore matrix and expanded perlite, closed-cell foam of polystyrene and polyurethane is combined, and nano titanium dioxide and graphene functional filler are matched, so that the heat conductivity coefficient is reduced to 0.018 W / (mK) or below, the heat insulation efficiency is remarkably improved, nanoscale homogenization is ensured through high-shear dispersion in the process, the porosity is reserved through freeze drying, and the heat insulation performance is greatly improved. The microcapsule self-repairing layer can repair more than 85% of cracks, the service life is greatly prolonged, and in the aspect of function integration, the material has A-level fireproof, waterproof and weather-proof characteristics and heat preservation and heat insulation performance.

The invention belongs to the technical field of environmental science and resource utilization, and relates to a rapid enteromorpha humification method and application, under the action of a catalyst, enteromorpha is humified by a hydrothermal method to obtain an enteromorpha-based bio-organic fertilizer; the catalyst is more than one of nano ferric oxide, nano ferric chloride, nano cuprous chloride and ammonium sulfite. According to the method, rapid humification of the enteromorpha is realized, the high-activity fertilizer is prepared, the pollution problem of the enteromorpha is effectively solved, and resource utilization of the enteromorpha is promoted.

The application provides a weathering steel surface rust layer stabilizing treatment agent for industrial atmospheric environment, and the chemical composition of the weathering steel surface rust layer stabilizing treatment agent is as follows in terms of mass fraction: 25-45% of acrylic resin, 2.0-6.0% of chromium sulfate, 3.0-8.0% of ferrous oxide, 2.0-6.0% of ferric oxide, 0.5-3.5% of copper sulfate, 0.3-1.5% of sodium bisulfite, 1.0-6.0% of sodium molybdate, 0.5-3.5% of nickel sulfate, 2.0-5.0% of potassium phosphate, 0.05-0.5% of surfactant, 0.05-0.5% of defoaming agent, 0.05-0.5% of dispersing agent, 0.05-0.5% of thickening agent, and the balance is water, wherein the amount of plasticizer added is 2-5% of the resin. The stabilizing treatment agent in the application can promote the weathering steel surface to form a stable and dense rust layer within 0.5-1 year after the surface of the weathering steel is treated before use.

The application belongs to the field of metal materials, and discloses a method for preparing porous iron by impregnating organic foam, which comprises the following steps: step 1: impregnating slurry into a polyurethane foam template after roughening, to obtain a slurry-attached foam template; the slurry is an aqueous solution containing water-soluble resin, iron powder, ferric oxide, surfactant and thickening agent; the water-soluble resin contains a curing agent; step 2: performing rolling and drying operations on the slurry-attached foam template obtained in step 1, to obtain a green body; and step 3: performing combustion, reduction and sintering operations on the green body obtained in step 2. By using a foaming surfactant, the foaming effect of the foaming surfactant is utilized to solve the problem of closed pores and increase the porosity, and the water-soluble resin is used in combination, so that the material has certain toughness and tensile strength while the porosity is increased, and the porous iron material with high porosity and high strength is obtained. Meanwhile, the application also discloses a porous iron.

The invention provides a dark metal modified lithium orthosilicate-based thermochemical heat storage material as well as a preparation method and application thereof, and belongs to the technical field of energy and material science. The components of the heat storage material comprise lithium orthosilicate and dark metal, the proportion of the dark metal in the heat storage material is 2-10 mol%, and the source of the dark metal comprises one or more of manganese dioxide, ferric oxide, nickel oxide and copper oxide. Metal ions introduced into the obtained dark metal modified lithium orthosilicate-based thermochemical heat storage material have the effects of promoting the ion migration rate and resisting material sintering, and specifically, the heat storage density and the cycling stability of the material are remarkably enhanced. In addition, due to the introduction of the dark metal oxide, the color of the heat storage material is remarkably deepened, the solar spectrum absorptivity is greatly improved, the light absorption performance of the material is greatly enhanced, and the heat storage material has higher photo-thermal conversion efficiency and is more suitable for a concentrating solar energy storage system.

The invention belongs to the technical field of electrocatalytic nitrate reduction catalysts, and particularly relates to a graded porous hollow carbon fiber catalyst with synergistic monatomic iron and ferric oxide clusters as well as a preparation method and application of the graded porous hollow carbon fiber catalyst. The preparation method specifically comprises the following steps: stirring polyacrylonitrile and polymethyl methacrylate in an organic solvent to obtain a spinning precursor solution; the preparation method comprises the following steps: taking ferrous sulfate heptahydrate and 1, 10-phenanthroline as ligands, and stirring in an organic solvent to obtain a metal organic ligand; the preparation method comprises the following steps: stirring a spinning precursor solution and a metal organic ligand, obtaining a metal precursor-loaded composite fiber through an electrostatic spinning technology, and then carrying out pre-oxidation and high-temperature pyrolysis to obtain the composite fiber. The prepared carbon fiber has good conductivity and a unique hollow hierarchical porous structure, transmission of reactants is greatly promoted while more active sites are exposed, the carbon fiber serves as a monatomic synergistic cluster catalyst carrier, rapid transmission of electrons is facilitated, and the electro-catalysis efficiency is effectively improved.

The invention relates to the technical field of oilfield chemistry, in particular to a nano-composite viscosity reducer, a preparation method, application and a high-viscosity thick oil viscosity reduction method. According to the preparation method, the nano composite viscosity reducer is prepared from a surface-modified nano oxide and an amphiphilic polymer through a solvent exchange method; the nano oxide is nano silicon dioxide nano particles, zinc oxide nano particles or ferric oxide nano particles, and the amphiphilic polymer is a partial esterification product of a styrene-maleic anhydride copolymer or an octadecyl acrylate-methacrylic acid copolymer. According to the preparation method, the viscosity reducer not only can efficiently disassemble a colloid asphaltene network structure, but also has a certain catalytic modification function, does not influence subsequent treatment of crude oil, and has the advantages of high viscosity reduction efficiency, lasting effect, no formation of stable emulsion, shear resistance, good temperature resistance, strong universality and the like.

The invention discloses a multi-band high-stability ferrite magnetic material composite formula and a preparation process, and relates to the technical field of magnetic materials. The ferrite magnetic material composite formula comprises 38-42 parts of ferric oxide powder, 37-41 parts of ferroferric oxide powder, 6-12 parts of graphene nanosheets, 5-7 parts of hydroxypropyl methyl cellulose, 6-9 parts of lanthanum oxide, 4-6 parts of scandium oxide, 1-3 parts of nano titanium dioxide, 4-6 parts of bismuth magnesium boron, 9-13 parts of ferric sulfate, 3-5 parts of manganese sulfate, 4-6 parts of zinc sulfate, 2-4 parts of copper sulfate and 2-3 parts of samarium sulfate. By utilizing a physical vapor deposition gradient doping process, the problems that an existing ferrite magnetic material is single in electromagnetic performance, cannot stably and efficiently work in a multi-frequency-band complex electromagnetic environment and cannot meet the requirements of the fields of communication, radar, electronic countermeasure and the like for wide-frequency-band and high-performance magnetic materials can be solved.

The application relates to high-quality steel slag aggregate and a preparation method and application thereof, the method is a grading carbonization process, which comprises the following steps: (1) primary carbonization and reduction: taking molten steel slag in a state of 1300 DEG C-1500 DEG C as raw material, continuously introducing industrial waste gas into a hot steaming tank for carbonization in a water spraying cooling process for 8h-14h, meanwhile, making the diiron trioxide in the steel slag be reduced into iron single element and magnetite, and obtaining primary carbonized steel slag; the volume ratio of CO2 in the industrial waste gas is 20%-30%, and the volume ratio of CO is 30%-60%; (2) secondary carbonization: selecting the primary carbonized steel slag below 10mm in step (1) as aggregate, spraying the steel slag aggregate according to a preset spraying amount in a closed container, maintaining the pressure in the closed container as 0.3-0.5 Mpa, continuously introducing the same industrial waste gas into the closed container for secondary carbonization, and making the free calcium oxide content in the steel slag aggregate be lower than 3%; and magnetically selecting the high-quality steel slag aggregate after secondary carbonization. According to the method, the high-quality steel slag aggregate meeting the relevant technical requirements can be prepared within 24h, and is used for preparing asphalt concrete.

The invention discloses a K-type phosphate cement-based anchoring agent and a preparation method thereof. The K-type phosphate cement-based anchoring agent comprises the following components: a cementing material, a curing agent, an early strength agent, a filler and water, wherein the cementing material is prepared from magnesium oxide, ferric oxide and ferrous oxide through high-temperature firing. According to the invention, phosphate cement is modified, and the early strength agent and the filler are introduced, so that the K-type anchoring agent which is suitable for coal mine use is developed, and the anchoring agent has the advantages of a cement-based anchoring agent and a resin-based anchoring agent, namely, the anchoring agent is safe, low in cost, high in drawing resistance, good in early performance, good in weather resistance and the like.

The application provides a method for preparing a magnetic heterostructure material of magnetite-graphene and application of the magnetic heterostructure material in a directional heat-conducting composite material, and belongs to the technical field of composite materials. The method comprises the following steps: (1) slowly adding a sodium hydroxide solution into a ferric chloride solution under water bath condition to prepare a ferric hydroxide gel, and sequentially performing drying and aging, centrifugation, cleaning and freeze drying on the gel to obtain a ferrous oxide nanocrystal; (2) adding the ferrous oxide nanocrystal, graphene and dopamine hydrochloride into a Tris buffer solution and fully stirring, and performing multiple centrifugation, cleaning and freeze drying to obtain ferrous oxide-dopamine-graphene; and (3) performing calcination reduction on the ferrous oxide-dopamine-graphene to obtain the magnetic heterostructure material of magnetite-graphene. The magnetic heterostructure material prepared by the method can be applied to the preparation of the directional heat-conducting composite material as a heat-conducting filler, and has the advantages of high operability, low cost and the like.

The application discloses a preparation method of a ferroferric oxide-sepiolite (Fe2O3-SEP) catalyst for CO2 amine solution desorption, wherein the catalyst is obtained by loading metal oxides on sepiolite through an impregnation method. The method comprises the following steps: firstly, magnetically stirring and impregnating a metal nitrate solution and sepiolite in a water bath, then performing suction filtration, drying, grinding and calcination to obtain the supported Fe2O3-SEP catalyst. The obtained catalyst is used for desorption of saturated amine-rich solution, the amine-lean solution after desorption is cooled, the CO2 loading amount of the amine-lean solution is titrated, CO2 is introduced again for absorption, and the amine-lean solution is recycled for 4-5 times. Compared with existing catalysts, the catalyst has the advantages of wide raw material distribution, low price, simple preparation process, no other by-products, stable catalytic performance and no influence on CO2 absorption performance of the amine solution.

The invention discloses a metal oxide composite sodium ferric sulfate positive electrode material as well as a preparation method and application thereof, and belongs to the technical field of sodium ion battery positive electrode materials. The metal oxide composite sodium ferric sulfate positive electrode material comprises the following raw materials in parts by mass: 1-20 parts of sodium sulfate, 2-40 parts of ferrous sulfate, 0.05-1 part of an antioxidant, 0.05-1 part of a carbon source and 0.01-2 parts of metal oxide, the metal oxide is at least one of ferrous oxide, ferric oxide, ferroferric oxide, manganese oxide, manganese dioxide, cobalt oxide, cobaltosic oxide, cobaltic oxide, vanadium monoxide, vanadium dioxide, vanadium trioxide, vanadium pentoxide, nickel oxide and copper oxide. The invention also discloses a preparation method and application of the metal oxide composite sodium ferric sulfate positive electrode material. The method provided by the invention can solve the problems of low conductivity and specific capacity of the existing sodium ferric sulfate positive electrode material, and has the advantages of low cost, strong process adaptability and wide application prospect.

The invention discloses a far infrared material and a manufacturing method thereof. The manufacturing method of the far infrared material comprises the following steps: grinding titanium dioxide and ferric oxide into first slurry; grinding kaolin, talc and aluminum oxide into second slurry; mixing the first slurry and the second slurry to form a third slurry; drying and sieving the third slurry to obtain powder; and molding the powder, and sintering the molded powder at a temperature of 1250-1400 DEG C to obtain the far infrared material. Therefore, the far infrared ray emissivity of the manufactured far infrared ray material in the wavelength range which can be absorbed by a human body can reach 0.949309, and no radiation element exists.

The application discloses a preparation method of a ferroferric oxide electrode material and application of the ferroferric oxide electrode material in an electrode, a device and a method for photoelectrocatalytic degradation of phenol. The electrode is prepared by in-situ adhering a layer of uniform iron-containing intermediate on the surface of a metal mesh through thermal decomposition of an iron-containing compound, and converting the layer of the iron-containing intermediate into ferroferric oxide through heat treatment. The obtained electrode can realize photoelectrocatalytic complete degradation of water-phase phenol under irradiation of ultraviolet light, and the performance is far higher than that of a ferroferric oxide electrode based on a metal sheet and a ferroferric oxide electrode based on FTO under the same conditions. The preparation method has mild conditions, a simple and controllable process, and high raw material utilization rate; the prepared electrode is low in price, environment-friendly and non-toxic, uniform and dense in the film layer, high in catalyst loading per unit area, and can simultaneously improve the two problems of poor light condition and low material exchange rate existing in a photoelectrocatalytic water-phase phenol degradation system, and has high practical application value.

The invention relates to the field of refractory materials, in particular to a high-erosion-resistance refractory material based on boron nitride modification and a preparation method of the high-erosion-resistance refractory material. The problem that an existing refractory material is poor in erosion resistance is solved. The refractory material is prepared by taking zirconium dioxide, silicon dioxide, calcium oxide, ferric oxide and aluminum oxide as matrixes and adding samarium lanthanum magnesium aluminum composite gel powder and boron nitride loaded chromium sesquioxide, magnesium nitrate, aluminum nitrate, samarium nitrate, lanthanum nitrate and citric acid form gel, high-temperature treatment is performed to obtain the samarium lanthanum magnesium aluminum composite gel powder, and the samarium lanthanum magnesium aluminum composite gel powder is added to the boron nitride loaded chromium sesquioxide. Boron nitride is loaded with chromium sesquioxide after being treated by tannic acid, the corrosion resistance of the material is enhanced through the synergistic effect of all the components, and the material is suitable for high-temperature furnaces, high-temperature reactors and other industrial environments needing high-temperature resistance and high corrosion resistance.

The invention discloses a rare earth doped iron oxyhydroxide / ferric oxide-three-dimensional graphene composite material and a preparation method thereof, the material is x% RE-FeOOH / Fe2O3 (at) 3D Gr, x is the molar ratio of rare earth ions to iron ions, the value range of x is 1-8.5, RE is one of rare earth elements Ce, La, Sm, Nd or Y, and RE is one of rare earth elements Fe, La, Sm, Nd or Y; the preparation method comprises the following steps: preparing a mixed solution A from an iron salt, a rare earth salt and an alkaline solution, adding a complexing agent into a graphene oxide solution to prepare a mixed solution B, performing ultrasonic treatment on the two solutions, mixing, adding a reducing agent, performing ultrasonic treatment again, and finally performing hydrothermal treatment, washing, freeze drying and low-temperature sintering. Rare earth ions can induce oxygen vacancies, increase active sites and promote ion transmission, the maximum mass specific capacitance of the material under 0.5 A / g reaches 1218.7 F / g, and the maximum capacitance retention rate of a flexible supercapacitor assembled by the material is 97% after 5000 times of charging and discharging.

The invention discloses a high-strength wear-resistant thermal-insulation refractory material for dry quenching and a preparation method thereof, and relates to the technical field of refractory materials, the high-strength wear-resistant thermal-insulation refractory material comprises the following raw materials by weight: 60-70 parts of silicon carbide, 0.5-1 part of ferric oxide, 10-15 parts of alumina, 5-7 parts of an auxiliary agent, and 8-12 parts of mullite powder. According to the refractory material for the dry quenching, by using a proper amount of the auxiliary agent and cooperating with the silicon carbide, the mullite powder, the ferric oxide and the aluminum oxide, the thermal insulation performance of the prepared refractory material for the dry quenching meets the use requirements, and meanwhile, the refractory material for the dry quenching is endowed with high normal-temperature compression strength, high-temperature breaking strength and wear resistance.

The application discloses an efficient treatment method of industrial waste salt, comprising the following steps: mixing the industrial waste salt with a certain proportion of functional particles, and performing microwave treatment; wherein the functional particles are composed of first functional particles and second functional particles; the first functional particles are selected from one or more of silicon carbide, diiron trioxide, titanium dioxide and zinc oxide; and the second functional particles are selected from one or more of 2,6-di-tert-butyl-p-cresol, hydroquinone, tert-butyl catechol and copper naphthenate. The functional particles used in the application have multiple functions such as microwave absorption, reaction catalysis, polymerization inhibition and antioxidation, etc. When the functional particles are mixed with the industrial waste salt and subjected to microwave irradiation, the organic and inorganic small molecules can be catalyzed to crack and generate gaseous small molecules, and meanwhile, the organic matters in the industrial waste salt can be prevented from polymerization, so that the increase of the content of organic polymers in the waste salt is avoided.

The invention belongs to the technical field of catalysts, particularly relates to an ammonia decomposition hydrogen production catalyst and a preparation method and application thereof, and aims at the technical bottlenecks that an existing iron-based catalyst is low in activity, poor in stability and the like in an ammonia decomposition reaction, a mesoporous material MCM-41 is innovatively adopted as a carrier, and iron trioxide is loaded for ammonia decomposition hydrogen production, so that the catalyst is prepared. The problems that an iron-based catalyst is low in catalytic activity and easy to sinter in the ammonia decomposition process are effectively solved, and an efficient and reliable catalyst solution is provided for industrial application of an ammonia decomposition hydrogen production technology.

The invention relates to the technical field of metal smelting, and provides a device and method for reducing ferric oxide in red mud / copper-containing smelting slag through electromagnetic induction-arc plasma hydrogen synergy, and the method comprises the steps that S1, pretreatment of the red mud / copper-containing smelting slag is conducted, specifically, the red mud / copper-containing smelting slag is dried till the red mud / copper-containing smelting slag contains water lt; 5%, crushing to 1t; 1 mm; s2, the red mud / copper-containing smelting slag treated in the step S1 and an additive are mixed according to the mass ratio of 100: (0.1-10), and a reaction mixture is obtained; s3, the reaction mixture is heated to 200-700 DEG C through electromagnetic induction, meanwhile, plasma hydrogen is added for a reaction in an oxygen-free environment, and the reaction time is 10-40 min; s4, cooling a reaction product obtained after the reaction in the step S3 to 1t; then, magnetic separation is carried out on the magnetic concentrate, and magnetic concentrate is obtained; and S5, carrying out acid dissolution or building material utilization on the tailings. Impurities (Al, Si, Ca and Ti) are not reduced, a gangue phase is kept, and the impurity content of magnetic concentrate is low.

The application discloses a regenerative lubricating oil deacidification agent and a preparation method thereof, and relates to the technical field of lubricating oil deacidification agents.The application first prepares macroporous spherical activated carbon, carries out hydroxylation treatment on the macroporous spherical activated carbon by using sodium zincate, embeds anion resin into the acid-treated spherical activated carbon, retains the hollow structure of the activated carbon, and increases the contact surface area of the resin to improve the adsorption efficiency; after adsorption, the resin expands to fill the pores of the activated carbon, and the adsorption effect is further improved.Secondly, long-chain polyvinyl alcohol is bonded to the surface of silica gel to obtain silica gel with a multi-hydroxyl group, a hybrid deacidification agent of silica gel embedding metal nanoparticles and activated carbon is prepared by using a sol-gel method, and the deacidification agent contains a certain magnetism by using ferric oxide, and the deacidification agent is still an integral whole after deacidification, so that the subsequent recycling and regeneration are facilitated.The deacidification agent prepared by the application has the effects of efficient deacidification adsorption and recycling regeneration.

The invention discloses an aerogel coating and a preparation method thereof, and belongs to the technical field of aerogel paints.The aerogel coating is mainly prepared from water-borne epoxy resin, composite silicon dioxide aerogel, kieselguhr, a defoaming agent, a coalescing agent, water and the like, through mutual cooperation and combined action with other raw materials, the coating has good radiation performance and heat insulation performance and can meet the requirements of different application scenes. The composite silicon dioxide aerogel is prepared by adding nano ferric oxide, nano titanium dioxide and graphene oxide during preparation of the composite silicon dioxide aerogel, so as to form a composite compact net-shaped structure in which the silicon dioxide aerogel is filled with the nano ferric oxide, the nano titanium dioxide and the graphene oxide; due to the synergistic effect of the four materials and a formed specific composite structure, the composite silicon dioxide aerogel has good heat insulation performance and radiation performance and can be used as filler of a coating.

This invention discloses a modified steel slag-based solar selective absorption and thermal storage ceramic particle and its preparation method. The raw materials, by mass percentage, consist of the following components: 40-80 wt% steel slag, 15-25 wt% alumina, 5-18 wt% ferric oxide, 0-7 wt% manganese dioxide, and 0-10 wt% titanium dioxide. The above raw material powder is mixed evenly, shaped, and calcined at high temperature to obtain the solar tower thermal power generation thermal storage ceramic particle. The solid ceramic particle prepared by this invention achieves high-efficiency absorption of solar radiation while also exhibiting low infrared emission, stable performance at high temperatures, and lower cost.

The invention provides high-wear-resistance black microcrystalline glass, a composition and a preparation method. The composition of the high-wear-resistance black microcrystalline glass comprises a basic component and an additive, the basic component is prepared from the following components in parts by mass: 65 to 75 parts of silicon dioxide, 5 to 10 parts of aluminum oxide, 8 to 12 parts of lithium oxide, 3 to 5 parts of zirconium oxide, 1 to 2 parts of ferric oxide, 0.1 to 0.5 part of cobalt oxide and 0.2 to 0.6 part of nickel oxide; the additive comprises boric acid and sodium carbonate. The preparation method of the high-wear-resistance black microcrystalline glass comprises the following steps: mixing the components in the composition, and melting to obtain molten glass; s3, cooling the molten glass to an intermediate temperature to obtain a glass precursor; s4, the glass precursor is sequentially subjected to first heat preservation treatment, second heat preservation treatment, third heat preservation treatment and fourth heat preservation treatment, and a glass ceramic primary product is obtained. The wear resistance and optical performance of the black microcrystalline glass are improved, and meanwhile good mechanical performance is kept.

The present invention discloses an inhibitor for the chlorination of chlorinated aromatic hydrocarbons, comprising the following components: one or both of copper oxide and ferric oxide, and activated carbon. The present invention also discloses a method for preparing the inhibitor, comprising: dissolving CuO and Fe2O3 in a hydrochloric acid solution, thoroughly mixing the two suspensions after ultrasonic vibration, adding activated carbon, and drying and calcining the mixture. The present invention also provides applications of the inhibitor. The present invention features mild preparation conditions, convenient operation, environmental friendliness, a simple process, high inhibition efficiency, and promising application prospects.

The present disclosure relates to a method for preparing an acid gas drying dehydrating agent from waste dechlorination agent, the method comprising: S1, subjecting the waste dechlorination agent to a first calcination treatment under an inert atmosphere to obtain a first material; S2, subjecting the first material to an impregnation treatment in an acid solution and then filtering and washing to obtain a second material; S3, subjecting the second material to a drying treatment and a second calcination treatment; wherein the waste dechlorination agent contains calcium oxides and hydroxides, aluminum oxide, sodium oxide, magnesium oxide, diiron trioxide, and calcium chloride. Using the acid gas drying agent of the present disclosure, the hydrogen chloride content in the gas does not change while dehydrating, and the supplement of chlorine can be reduced.

The invention relates to the technical field of permanent magnetic ferrite materials, and discloses a high-performance permanent magnetic ferrite material with both high residual magnetism and high coercive force and a preparation method thereof.The main crystalline phase of permanent magnetic ferrite is M-type ferrite, raw materials are matched according to the mass percent, ferric oxide accounts for 84-88 wt%, strontium carbonate accounts for 12-16 wt%, and 1-1.5 wt% of SiO2 is added; the preparation method comprises the following steps: calculating the weight of iron oxide and strontium carbonate according to the mass percentage, calculating the weight of SiO2 according to the total weight, and uniformly mixing; pre-sintering, cooling and crushing to obtain a pre-sintered material; adding the pre-sintered material into a ball mill, adding distilled water and a secondary additive, and performing wet grinding to obtain slurry; orientation molding: carrying out compression molding on the slurry under an orientation magnetic field to obtain a green body; and sintering the green body, and cooling to room temperature to obtain the permanent magnetic ferrite. By optimizing the ratio of the composite alkaline earth metal and cooperatively doping Co and rare earth elements, the magnetic performance is improved.

The present invention discloses a method for preparing a magnetic separation material for removing heavy metals from soil, comprising the following steps: S1: grinding ferroboric ore powder into particles of about 2,000 meshes, then magnetically separating ferroboric concentrate, and then roasting the magnetically separated ferroboric concentrate to sinter the iron element in the ferroboric concentrate into ferric oxide. In the present invention, the device can fix the mold, and the staff can inject the metal liquid to facilitate the molding of the metal liquid in the mold. The position of the device and the mold can be changed by pushing the pull rod. The position of the mold can be easily adjusted when it falls on the rotating roller, making it easier for the staff to knock the mold so that the mold can be directly broken on the rotating roller, facilitating the cooling and molding of the magnet metal inside the mold in the air. This simplifies the traditional magnet molding steps, is more convenient, and saves the staff's time.

The invention relates to the technical field of oxide magnetic material manufacturing, and discloses a preparation method of an ultrahigh magnetic saturation manganese zinc ferrite magnetic core, and the preparation method comprises the following steps: S1, weighing raw materials in parts by mass; s2, mixing and calcining the rare earth oxide and ferric oxide; s3, mixing the rare earth doped precursor with manganese oxide and zinc oxide; s4, coating the main component mixed powder by a sol-gel method; s5, performing microwave irradiation activation on the coated powder, and synchronously applying a pulsed magnetic field to induce orientation; s6, performing compression molding on the activated powder, and then performing staged sintering; and S7, annealing and cooling the sintered green body to obtain the magnetic core. By adopting innovative processes such as calcination treatment of rare earth oxide and ferric oxide, coating by a sol-gel method, microwave irradiation activation and pulsed magnetic field induced orientation, the magnetic saturation intensity and consistency of the magnetic core are remarkably improved, and the problem of non-uniform doping of rare earth in the prior art is solved.