134 results about "Iron metal" patented technology

The invention provides an iron metal oxyhydroxide catalyst, a preparation method thereof and application of the iron metal oxyhydroxide catalyst in urea electrosynthesis, and belongs to the technical field of electrocatalysis, the iron metal oxyhydroxide catalyst comprises a stainless steel mesh substrate and a FeOOH layer coating the surface of the stainless steel mesh substrate; wherein the stainless steel mesh substrate is subjected to diluted hydrochloric acid soaking ultrasonic pretreatment. The iron metal oxyhydroxide catalyst with a polarized Fe0-Fe3 + structure is prepared by taking a stainless steel mesh pretreated by diluted hydrochloric acid as a substrate through an electrochemical deposition process. The catalyst has high C-N coupling selectivity and good cycling stability in a urea electro-catalysis synthesis reaction.

The invention discloses a composition containing a honeysuckle extract, a tablet and a production method thereof, and belongs to the technical field of medicines.The preparation method comprises the steps that pseudo-ginseng, honeysuckle and radix isatidis are dried and ground into powder, a hydrogel film coating with an environmental response function is prepared, and the hydrogel film coating has porosity and environmental tolerance, can improve the slow release performance of a medicine, and has a good application prospect. The active ingredient preservation time of the medicine is protected, and the medicine effect is prolonged; according to the hydrogel film coating, natural plant-derived polysaccharide and microcrystalline cellulose with excellent biocompatibility are used as raw materials, the raw materials are subjected to swelling treatment and then grafted with a polyethylene glycol-maleic anhydride copolymer, then an iron metal framework sensitive to the pH value is subjected to hydrothermal synthesis on the surface, the iron metal framework serves as a crosslinking center, a hydrogel film structure is generated through crosslinking to serve as the coating, and the hydrogel film coating is prepared. Therefore, the permeation resistance and mechanical strength of the coating are balanced, the swelling rate difference is avoided, the structural stability of the coating is guaranteed, and the tablet prepared from the coating can be used for treating cold and has a good drug effect.

The present invention generally relates to electrochemical energy storage and battery technology. Specifically, the present invention relates to bifunctional electrocatalyst for metal-air electrochemical device. More particularly, the present invention relates to Nickel-Iron metal¬ organic framework (NF-MOF) as bifunctional electrocatalyst for zinc-air battery application. Further, the present invention relates to synthesis of Nickel-Iron metal-organic framework (NF- MOF) by refluxing method.

This invention relates to iron single-atom composite catalysts with a double-layered carbon dot core-carbon-nitrogen shell structure and their applications. The catalyst preparation method is as follows: carbon source, nitrogen source, and iron metal salt are dispersed in a mixed solution of solvent and coordinating agent and stirred evenly, followed by hydrothermal reaction; after the reaction, the supernatant is filtered and dialyzed, and the dialysate is freeze-dried to obtain Fe. SA / CDs material; add zinc nitrate hexahydrate and iron metal salt to deionized water, add Fe SA / CDs aqueous solution, then add the solution of 2-methylimidazole completely dissolved in deionized water, ultrasonically stir, and after the reaction, obtain Fe. SA / CDs / Fe@ZIF-8 precursor; the precursor was subjected to Joule heat treatment and cooled to room temperature to obtain an iron single-atom composite catalyst with a bilayer carbon dot core-carbon-nitrogen shell structure. This invention effectively improves the catalytic activity and stability of the catalyst in the benzaldehyde oxidative nitrification reaction.

The application discloses a metal waste sorting and recycling device for an automobile accessory processing plant, and relates to the technical field of metal waste recycling.The device comprises an H-shaped base, a conveying belt for conveying metal waste is arranged above the inside of the H-shaped base, an adsorption and recycling mechanism is arranged on the upper portion of the H-shaped base, a limiting plate is arranged on one side of the adsorption and recycling mechanism on the upper portion of each side of the H-shaped base, a limiting groove is arranged on one side of each limiting plate, a scraping mechanism is arranged to slide transversely between the limiting grooves on the two limiting plates, and a collecting mechanism is arranged inside the lower portion of the H-shaped base.The metal waste sorting and recycling device for the automobile accessory processing plant drives the scraping rod to move horizontally and linearly through the linkage mechanism, and uniformly scrapes the accumulated waste on the conveying belt.This design effectively solves the problem of waste accumulation, ensures the uniform distribution of the waste on the conveying belt, and improves the adsorption effect of the electromagnet sleeve on the iron metal.

The application discloses a kind of material processing equipment inner wall coating thickness measurement method, thickness measuring equipment and system, it is related to ultrasonic measurement technical field.The method controls the ultrasonic sensor located on the outer wall of material processing equipment to emit ultrasonic signal, and target signal is received by the ultrasonic sensor, the target signal includes the first echo signal formed by the interface reflection of coating and material in material processing equipment, and the second echo signal formed by the reflection of material.The method determines the first transmission time length of ultrasonic signal to the first interface based on the target signal and the ultrasonic signal, and then determines the thickness of coating based on the first transmission time length and the first transmission speed of ultrasonic signal in coating.Because the thickness of coating in the inner wall of material processing equipment can be measured outside material processing equipment, it is not necessary to disassemble material processing equipment, and iron metal foreign matter is not introduced into material, so that the purity of material can be avoided during the measurement process of coating thickness.

The invention discloses a centrifugal production method of a bimetallic wear-resistant pipe, which is applied to the field of centrifugal casting. The method comprises the following steps: 1) preparing a self-propagating pipe, wherein the thickness of a self-propagating layer is 1-2mm; (2) the self-propagating pipe is installed in the pipe mold, and the center lines of the two are consistent; 3) heating the self-propagating pipe: heating the self-propagating pipe by adopting a heating furnace, a gas pipe, an electric heating piece, an induction coil and the like; (4) pouring the molten metal: pouring the high-chromium cast iron molten metal when the temperature of the self-propagating pipe is 200-600 DEG C, and (5) cooling and demolding: cooling and demolding after the high-chromium cast iron molten metal is solidified to form the bimetallic wear-resisting pipe. According to the bimetallic wear-resisting pipe produced by the method, the wear-resisting layer is 5 mm thinnest, the product blank of 5-10 mm of the wear-resisting layer which is centrifugally poured is filled, and the wear-resisting layer is free of cracks and long in service life.

The invention relates to a color developing solution for detecting iron metal foreign matters in a lithium battery production process and a detection method, and the color developing solution comprises the following components in parts by volume: 3-4 parts of an acid solution, 1-2 parts of an oxidizing agent and 3-4 parts of a thiocyanate solution. The color developing solution is provided for detection of the iron metal foreign matter in the lithium battery production process, the iron metal foreign matter in the lithium battery production process is rapidly and qualitatively detected by utilizing a color developing reaction of ferric ions and thiocyanate ions to generate a blood red complex iron thiocyanate, and the detection sensitivity, the detection efficiency and the speed are high; the reagent of the color developing solution is nontoxic and harmless, the cost is low, the color developing solution is particularly suitable for large-batch detection on a mass production line, the detection efficiency of the production line is greatly improved, and meanwhile, high detection sensitivity is taken into account.

Provided herein is a use of an aqueous slurry or powder composition, a method for marking an object made of a steel, metal or non-ferrous metal alloy, the method comprising the step of applying a powder or aqueous slurry to the object to provide a mark, and a marked object obtained thereby, the powder or aqueous slurry comprises: A, an aluminum compound other than aluminum titanate and aluminum nitride, preferably comprising one or more selected from the group consisting of aluminum oxide and aluminum hydroxide; and B is one or more particles selected from the group consisting of oxides, hydroxides, carbides, nitrides, aluminates and titanates of aluminum titanate, aluminum nitride, and metals or semimetals other than aluminum. The marking can be provided on an object made of, for example, steel or other metal or metal alloy, is durable even at high temperatures, but can be removed by a simple physical operation, for example, scrubbing or wiping, without compromising the nature or size of the marked object.

A low heat, electrochemical cascade process generates iron metal (Fe2) from iron ore and a sequence of alkaline electrolytic solutions. An intermediate phase favors iron oxide in a layered double hydroxide (LDH) form resulting from conditioning silicates in the alkaline solution over chemically inert Fe3O4 formation. The alkaline electrolytic solution mitigates production of hydrogen gas over acidic approaches by inhibiting a hydrogen evolution reaction (HER) that forms parasitic hydrogen gas. An electrolyte containment generates an electrolyte flow for the cascading electrochemical reaction as the raw iron oxide transforms to iron metal while avoiding conventional shortcomings of low value products of Fe3O4 (magnetite) and hydrogen gas, and instead favors generation of iron metal. Additional electrolyte salts can further form iron alloys.

The invention discloses metal material recovery vacuum purification equipment, and relates to the technical field of metal material recovery, the metal material recovery vacuum purification equipment comprises a shell, a material guide pipe is fixedly mounted at the bottom of the shell, sliding grooves are formed in the two sides of the material guide pipe, material blocking parts are slidably mounted in the sliding grooves, and a heating barrel is fixedly mounted at the bottom of the material guide pipe; a magnetic separation mechanism is installed at the axis of an inner cavity of the shell, and a material distribution mechanism is installed at the bottom of the inner cavity of the shell. According to the metal material recovery vacuum purification equipment, iron-containing metal and non-magnetic impurities are separated through the magnetic separation mechanism, the non-magnetic impurities in raw materials are effectively removed, the impurities are prevented from influencing the heating purification effect, the purity of the raw materials is improved, a vacuum pipe in the heating barrel is connected with a vacuum pump to extract air in the barrel to form a vacuum environment, and metal oxidation is avoided; meanwhile, the metal boiling point is greatly reduced, and metal is efficiently purified.

The structure is simplified, and the molten metal flows more smoothly, allowing for efficient dissolution and heating. [Solution] The furnace body 10 has heating chambers 12 and 13 that communicate with an input port 11 for non-ferrous metal materials, and a tapping chamber 14 that can receive a portion of the molten metal heated to a predetermined temperature in the heating chambers 12 and 13 and from which the molten metal can be removed, and a rotating blade 20 for circulation that is provided in the center of the heating chambers 12 and 13 to circulate the molten metal, and a plurality of electric heaters 30 and 40 provided in the heating chambers 12 and 13 to raise the molten metal to a predetermined temperature.

The invention relates to a magnetic material comprising at least iron, in metal form and / or in oxide form, and at least one clay matrix, the iron content being between 15% and 70% by weight of iron element relative to the total weight of said material, characterized in that said material has a specific surface area greater than 1 m² / g and less than 50 m² / g, and said material is in the form of beads or extrudates, and in that said material comprises at most 25% by weight of hematite relative to the total weight of said material.

The application discloses a preparation method of an iron-based complex positive electrode material and application thereof. Specifically, the iron-based positive electrode electrolyte is a positive electrode active material based on an iron metal organic complex, and a complex structure of the iron metal organic complex is formed by pyridine nitrogen coordination of ferrous ions and tris(2-pyridylmethyl)amine. The complex has good solubility (0.62 M) in a neutral aqueous solution, and an oxidation-reduction potential is 0.55 V vs. SHE, and can be used as a positive electrode electrolyte for a neutral water-based flow battery. The iron-based positive electrode electrolyte used in the application has cheap and easily available raw materials and a simple preparation method, provides a solution for constructing an efficient water-based flow battery, and is favorable for promoting large-scale application of the water-based flow battery.

The present invention relates to an induction heating-based composite-forming apparatus for preventing problems caused by excess electromagnetic fields. Also, the present invention relates to an induction heating-based composite-forming apparatus for preventing problems caused by excess electromagnetic fields, wherein portions of the forming apparatus located within a zone of influence in which induction heating occurs due to excess electromagnetic fields generated by the induction coil include a non-ferrous metal or a material having an iron content less than or equal to a certain level.

The invention relates to a magnetic material comprising at least iron, in metallic form and / or in oxide form, and at least an alumina oxide matrix, the iron content being between 15% and 70% by weight as element iron relative to the total weight of said material, characterized in that said material has a specific surface area greater than 50 m² / g and less than 300 m² / g, said material is in the form of beads or extrudates, and in that said material comprises at most 25% by weight of hematite relative to the total weight of said material.

The invention relates to a magnetic material comprising at least iron, in metal form and / or in oxide form, and at least one alumina oxide matrix, the iron content being between 15% and 70% by weight of iron element relative to the total weight of said material, characterized in that said material has a specific surface area greater than 50 m² / g and less than 300 m² / g, and said material is in the form of beads or extrudates, and in that said material comprises at most 25% by weight of hematite relative to the total weight of said material.

The invention provides an alloy aluminum foil for a lithium battery and a manufacturing method thereof, and relates to the technical field of aluminum-based alloys, electrolytic aluminum water is adopted as a raw material for smelting and casting, the alloy aluminum foil comprises the following components in percentage by mass: 0.30-0.50% of Fe, 0.07-0.12% of Si, 0.01-0.04% of Cu, 0.01-0.03% of Ti, 0.01-0.03% of Zr, less than or equal to 0.01% of Mn, less than or equal to 0.005% of Mg, less than or equal to 0.005% of Zn, 0-0.10% of Dy, 0-0.10% of Ho and 0-0.10% of Y, the sum of the mass percentages of Dy, Ho and Y is 0.01-0.20%, rare earth elements are added in the form of dysprosium iron, holmium iron and yttrium iron metals, and the balance of aluminum the rare earth element accounts for 50-80% of the alloy; the balance is Al and inevitable impurities; wherein the mass ratio of Fe to Si is 2.5-4.0, and the total content of Fe and Si is less than or equal to 0.38%. The surface wetting tension and the mechanical property of the aluminum foil are improved by limiting the Fe / Si ratio to be 2.5-4.0 and controlling Fe + Si to be smaller than or equal to 0.38%, adding dysprosium iron, holmium iron and yttrium iron to control 50-80% of rare earth, generating a nano precipitated phase through hot rolling annealing, controlling the grain size to be smaller than or equal to grade 1, performing double-rack cold continuous rolling ply rolling to 0.009-0.012 mm, and regulating the annealing strip speed and the injection pressure.

Essentially, an invention deals with a method for performing a process on a part. (P) which is made from a group of ferrous metals consisting of: The nitriding action that forms on the part(P) is a composite layer(2) of considerable thickness. Between 5 and 30 micrometers and the diffusion area (3) which is located below and Contact with the composite layer (2) with a thickness between 100 micrometers and 500 micrometers; Next, The operation of wet hardening of part (P) by induction at high frequency throughout. A deep induction hardening of 0.5 mm or more is required for this process. The part (P) and it is to make that part (P) have: Surface hardness greater than or equal to 50HRC. Hardness of the aggregate layer (2) greater than or equal to 400HV0.0s, The hardness of the part is greater than or equal to 500HV0.05 at a depth of 500. micrometer, And since the high-frequency induction hardening process is performed without... Apply a protective film to the part (P) before induction hardening. The invention also involves a part (P) which is made of ferrous metals. Significant resistance to wear by abrasion and adhesion; possesses friction properties. And it has improved scratch resistance and excellent corrosion resistance;

This is provided a process for recovering metallic element including iron from a metallic iron-comprising derivative. The process comprises the steps of: (1) activating the metallic iron-comprising derivative comprising sponge iron with a gaseous processing agent comprising hydrogen sulphide and a carbonylating agent comprising carbon monoxide, (2) carbonylating the metallic iron-comprising derivative that has been activated to obtain a carbonyl, and (3) decomposing the carbonyl to obtain the metallic element.

A method for laser cladding a gradient layer on the surface of a copper continuous casting crystallizer relates to a surface repair method for continuous casting crystallizers. The laser cladding gradient layer of this invention consists of an iron-based cladding layer and a nickel-based cladding layer. The iron-based cladding layer, serving as a transition layer, is composed of pure iron and pure cobalt metal powders. The nickel-based cladding layer, serving as the working layer, is composed of pure nickel, pure chromium, pure cobalt, and 99.999% yttrium oxide powder. These metal powders are dried at 200°C for 2 hours, then dry-milled at low speed using Al2O3 microspheres as the grinding media. A laser is used to transfer the intersection zone of the mixed powder and the laser light onto the workpiece to prepare the laser cladding gradient layer. This invention's laser cladding gradient layer strengthens the surface of the copper continuous casting crystallizer, enabling repeated repair of the copper crystallizer and improving material utilization.

Provided herein is a method for marking an object made from steel, metal or a non-ferrous metal alloy, the method comprising a step of applying a powder or an aqueous slurry to the object to provide for a marking, the powder or aqueous slurry comprising A an aluminium compound other than aluminium titanate and aluminium nitride, which preferably comprises one or more selected from the group consisting of aluminium oxides and aluminium hydroxides, and B particles of one or more selected from the group consisting of aluminium titanate, aluminium nitride, and oxides, hydroxides, carbides, nitrides, aluminates, and titanates of a metal or semi-metal other than aluminium, the use of such a powder or slurry for marking an object, and a marked object.

Disclosed is a technique by which hot direct reduced iron having a heightened carbon concentration is produced through a direct reduction process.　This method for producing hot direct reduced iron comprises: a reduction step in which a reducing gas is brought into contact with an iron oxide feedstock to obtain iron metal; and a cooling step in which the iron metal is carbonized while being cooled, thereby obtaining hot direct reduced iron. The cooling step comprises a first step, in which after the reduction step, methane gas is brought into contact with the iron metal, and a second step, in which after the first step, CO gas is brought into contact with the iron metal. In the second step, the iron metal in contact with the CO gas has a temperature of 400-700°C. In the second step, the proportion of the volume of a discharge gas that is discharged from the system to the volume of the gas that is supplied is 40% or higher.

The invention provides a comprehensive-wear-resistant and impact-resistant multiphase composite wear-resistant block and a preparation method and application thereof. The comprehensive-wear-resistant and impact-resistant multiphase composite wear-resistant block comprises a composite casting and molten steel smelted by tough cast steel, the preparation method comprises the steps that 3-5 parts of metal oxide powder, 1-3 parts of metal powder and 0.8-2 parts of non-metal powder are mixed through a mechanical alloying method to prepare a binding agent, and 4-7 parts of the binding agent, 0.6-1.2 parts of a binding agent, 4-6 parts of a ceramic material and 0.8-1.5 parts of a self-propagating synthesis raw material are mixed to prepare a preset block; a latticed / annular space is reserved at an easy-to-wear part, a preset block is filled, foam is covered, a pouring system is assembled for drying, lost foam coating is coated and then dried, a high-chromium cast iron metal base material is smelted and poured into a vacuum sand box, a casting is cooled and cleaned, and a composite casting is obtained. And the composite casting is used as a chiller coating, molten steel made of a tough cast steel material is smelted, and pouring and cooling are conducted to prepare the comprehensive-wear-resistant and impact-resistant multiphase composite wear-resistant block.

The invention provides a 90kg-grade ultralow-temperature high-strength steel welding rod and a preparation method thereof, and the welding rod comprises a core wire and a coating covering the surface of the core wire, the coating is prepared from, by weight, 35%-45% of marble, 15%-20% of fluorite, 3%-5% of silica powder, 2%-4% of rutile, 1%-2% of manganese metal, 1%-2% of ferrosilicon, 15%-20% of nickel metal, 5%-10% of ferrotitanium, 2%-5% of ferromolybdenum, 0.4%-0.8% of sodium alginate, 0.3%-0.9% of sodium carbonate, 0.2%-0.5% of lanthanum oxide and the balance iron powder. According to the welding rod, under the high channel temperature welding condition, the mechanical property of deposited metal can obtain high tensile strength in the welding state and the heat treatment state, and good low-temperature toughness is achieved.

The invention discloses a sponge-based defluorination composite material as well as a preparation method and application thereof. The sponge-based defluorination composite material comprises sponge serving as a carrier and metal salt loaded on the sponge, the metal salt comprises iron metal salt, aluminum metal salt and lanthanum metal salt; the iron metal salt is ferric sulfate or ferric chloride, the aluminum metal salt is aluminum chloride, and the lanthanum metal salt is lanthanum chloride or lanthanum nitrate. Compared with other adsorption type defluorination materials, the sponge-based defluorination composite material disclosed by the invention is low in cost, convenient to use and capable of being repeatedly used for many times; meanwhile, the sponge-based defluorination composite material is high in defluorination efficiency and stable in performance, and has remarkable application advantages.

The present application provides a kind of domestic waste landfill excavation screening water washing cracking system and its working method, and domestic waste landfill excavation screening water washing cracking produces cracking oil, carbon powder, cracking gas, relative to the direct combustion into incinerator in the past, not only reduce carbon emissions, and three have higher secondary utilization value, can be used to make up the cost of excavation screening.Sieving system includes drum screen, plastic separator, screen conveyor, screen magnetic separator, air separator, screen magnetic separator, drum screen, iron metal buffer bin, humus buffer bin, aggregate buffer bin and light material buffer bin;Washing system includes cleaning pool, salvage machine, crusher, strong washing machine, plastic packing machine, sediment clean water pool, sewage pool, centrifugal dehydrator and sludge plate frame filter press;Cracking system includes yard, loader, cracking device, hot blast furnace, oil-gas separation mechanism, oil tank and carbon powder packing machine.

This invention relates to the field of iron ore beneficiation technology and discloses a method for preparing efficient roasting and separation of refractory iron ore, comprising the following steps: S1, raw material pretreatment and pre-enrichment: refractory weakly magnetic iron oxide ore is crushed, and a dry separation method is used to pre-remove some low-grade waste rock to obtain pre-enriched rough concentrate; S2, intelligent grinding and drying; S3, magnetized roasting; S4, rapid quenching and stabilization of roasted ore. This invention, through rapid cooling (quenching) combined with an atmosphere protection process, stabilizes and solidifies the magnetism of the magnetized roasting product—magnetite—avoiding magnetic loss due to subsequent processing, providing a high-magnetic, stable feed for subsequent weak magnetic separation operations, which is a prerequisite for ensuring a high magnetic separation recovery rate; through strong magnetic separation to ensure recovery rate, combined with intelligent flotation to improve concentrate grade, a deep cleaning process is formed, achieving refined separation of complex roasting products, maximizing both the total iron metal recovery rate and concentrate grade simultaneously.

The application discloses a MOFs derived iron sulfide heterogeneous electro-Fenton catalyst, a preparation method thereof and application of the catalyst in degradation and removal of organic pollutants. The preparation method of the catalyst is as follows: iron metal organic framework material MOFs and sublimed sulfur are mixed, supercritical technology is used to make the sulfur easily enter the MOFs material channel, and then calcination is performed to make the MOFs framework collapse, and the sulfur element reacts with the metal iron element to generate iron sulfide, so that the electron transfer efficiency of the material is further improved, and the pH of the Fenton reaction is widened. The catalyst synthesis process is simple, convenient and controllable, the prepared granular catalyst is applied to a heterogeneous electro-Fenton system, has good catalytic effect, and overcomes the defect that a traditional electro-Fenton catalyst is difficult to recover. The method provides an innovative method for a heterogeneous electro-Fenton cathode.