134 results about "Iron content" patented technology

The invention relates to the technical field of hafnium oxide preparation, in particular to a method for preparing hafnium oxide with ultralow iron content, which comprises the following steps: based on N235 extraction separation in a hydrochloric acid system, crushing hafnium oxide raw stone, performing coarse grinding to obtain hafnium oxide powder, then sequentially performing alkali fusion decomposition treatment and acid leaching impurity removal treatment to obtain a zirconium-hafnium mixed solution, and then performing vacuum drying on the zirconium-hafnium mixed solution to obtain the hafnium oxide with ultralow iron content. The preparation method comprises the following steps: taking hafnium as a raw material, carrying out extraction and back extraction to obtain a hafnium-enriched solution, treating the hafnium-enriched solution with ion exchange resin to obtain a high-purity hafnium solution, finally adding saturated ammonia water, filtering and washing the obtained precipitate, drying, and firing to obtain the hafnium oxide with ultralow iron content. According to the invention, while zirconium and hafnium separation is realized, a small amount of contained metal cations, especially iron ions, are fully removed, and the iron content is reduced, so that hafnium oxide with ultralow iron content is obtained.

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.

Provided is a novel method for producing an adsorbent comprising an iron compound and having a large adsorption capacity. An adsorbent having a specific surface area of 200 m2 / g or more, a primary particle size of 10 nm or less, an iron content of 450 g / kg or more, and a moisture content of 100 g / kg to 300 g / kg can be obtained by the method for producing an adsorbent, the method including: a first step for adding a polyferric sulfate aqueous solution to an alkali aqueous solution to form a slurry; a second step for adjusting the pH of the slurry to 5.0 to 9.0; and a third step for subjecting the slurry to solid-liquid separation, washing the obtained cake, and adjusting the moisture content of the washed cake.

This invention discloses a composite pellet binder containing red mud and its application, belonging to the technical field of binders for metallurgical pelleting. The binder uses red mud, a waste residue from the alumina industry, as the main raw material, combined with functional additives. By mass percentage, red mud accounts for 73%~87%, with the remainder being functional additives. This invention, through multi-component synergistic formulation, solves the industry pain points of poor compatibility with strong alkalinity and insufficient self-binding performance of red mud. The prepared binder can directly replace bentonite used in pelleting, exhibiting superior pelletizing performance at the same addition amount. Simultaneously, it can increase the iron content of pellets by 0.248~0.62 percentage points, reduce ironmaking waste emissions, and possess significant environmental and economic benefits. It is compatible with existing pelleting production processes, requires no new equipment, and is easy to industrialize.

A pellet production method that can suppress bursting of green pellets can be provided. The method for producing an iron ore pellet includes grinding iron ore with iron content of 63 mass % or less to obtain ore powder, in which a volatile matter of the iron ore is 3.3 mass % or more, the ore powder has a cumulative 90% diameter of 150 μm or less in a volume-based particle size distribution and a particle size distribution index based on the harmonic mean diameter of 14,700 or more and 510,000 or less.

The invention relates to a metallurgical treatment method of high-grade cobalt-containing copper sulfide concentrate, which comprises the following steps: carrying out first-stage presoaking on the cobalt-containing copper sulfide concentrate to obtain first-stage presoaking liquid and first-stage presoaking slag; grinding the first-stage presoaking residues until the particles of the first-stage presoaking residues are smaller than 200 meshes and account for 95 wt% or above, introducing oxygen, and performing second-stage presoaking to obtain second-stage presoaking liquid and second-stage presoaking residues; the copper grade of the cobalt-containing copper sulfide concentrate is 60 wt% or above. In the presoaking process, a large amount of copper oxide minerals and iron compounds are leached into a solution, so that the iron content in the presoaking residues is reduced, and generation of refractory substances such as copper ferrite is reduced; and compared with the raw ore amount, the ore amount is reduced by 40% or above, the follow-up recovery difficulty is remarkably reduced, and the leaching rate of the cobalt-containing copper sulfide concentrate is effectively increased.

The invention discloses a molten aluminum refining production process capable of reducing the iron element content, and relates to the technical field of secondary aluminum refining. The process is combined with the characteristics of existing secondary aluminum refining equipment and process, and comprises the steps of pretreatment in a smelting furnace, refining in a holding furnace, online rotor refining and ceramic filtration, and multi-stage iron removal is realized by comprehensively applying a flux method, a gravity settling method and a ceramic filtration method. The iron removal flux and inert gas are blown through the rotor, the iron removal reaction is accelerated, the single-process iron removal effect and production efficiency are improved, and the flux consumption is reduced. The iron removal efficiency is stabilized at 62% or above, the iron content in the secondary aluminum is effectively reduced, the product quality is improved, and the method is suitable for industrial production.

This invention discloses a smelting method for reducing the total iron content in the final slag of a top-and-bottom combined blowing converter. The method involves: measuring the total slag concentration (TSC) during the later stages of blowing, and calculating the secondary oxygen blowing amount (V) required to reach the blowing endpoint based on the TSC measurement results. sce If V sce >1000Nm 3 Furthermore, after TSC measurement, the top and bottom lances have supplied oxygen V into the furnace. f <V sce -1000Nm 3 Then the flow rate ratio r between bottom oxygen supply and top oxygen supply should be controlled between 0.1 and 0.5; if 300 Nm 3 ≤V sce ≤1000Nm 3 or V f ≥V sce -1000Nm 3 The flow rate ratio r between bottom and top oxygen supply is controlled between 0.3 and 0.9, and the bottom oxygen supply pressure is controlled between 0.4 MPa and 0.9 MPa. This method establishes a mathematical model for the top and bottom oxygen supply flow rate ratio and the endpoint control scheme, and derives an independent dynamic control scheme for the top and bottom oxygen supply flow rates and the top and bottom stopping of blowing at the blowing endpoint.

This invention provides a method for determining the metallic iron content in steel slag, comprising the following steps: 1) selecting a representative steel slag sample from the steel slag to be tested, and ball milling the representative steel slag sample to form a sieve material that can pass through a 0.08 mm mesh sieve or a first magnetically separated material that can be attracted by a magnet; 2) further separating the sieve material by magnetic attraction to form a second magnetically separated material and tailings; 3) measuring the density ρ of the tailings. 尾渣 The first magnetic separator and the second magnetic separator are mixed to form a total magnetic separator, and the density ρ of the total magnetic separator is measured. 磁选物 ;4) According to ρ 尾渣 ρ 磁选物 The percentage of metallic iron in a representative steel slag sample is obtained by measuring the mass of a representative steel slag sample and the mass of the total magnetically separated material. This determination method is simple, convenient, and highly accurate, providing a precise basis for evaluating the recycling value and economic added value of steel slag.

This invention discloses a remote real-time control system for ceramic membrane magnetic filtration based on the Internet of Things (IoT). The system comprises a sensing layer, an edge computing layer, a cloud control layer, a user interaction layer, and a modular access unit. The sensing layer, centered on a gradient field permanent magnet magnetic filtration module, integrates a Hall sensor array, an electromagnetic flowmeter, and a temperature sensor to collect key data such as magnetic saturation index, syrup flow rate, and liquid temperature in real time, achieving comprehensive perception of the ferromagnetic impurity capture status and raw material parameters. The gradient field permanent magnet magnetic filtration module is connected in series with the syrup delivery pipeline and includes a multi-stage detachable magnetic rod assembly, a Hall sensor array, a servo rotating sleeve, and a slag discharge channel. Compared to traditional iron removal equipment, this IoT-based remote real-time control system for ceramic membrane magnetic filtration is specifically designed for the characteristics of high-sugar, high-acid liquids. The gradient field magnetic circuit improves the capture efficiency, stably controlling the iron content below 0.3 ppm, effectively preventing product blackening, sedimentation, and a metallic taste.

The utility model discloses built-in infrared electromagnetic double magnetic pole electromagnetic iron remover, include: combination bearing frame, a pair of circular heavy load circuit connector and a pair of iron remover metal protective shell, the utility model relates to ore mining auxiliary equipment technical field, and this iron remover adopts bipolar magnetic pole design, and cooperate infrared sensor, can automatic regulation power according to the iron content of the iron impurity in the lower running mineral, both guarantee the iron removal efficiency, and avoid energy waste, compared with traditional hard structure suspension, this equipment changes the flexible suspension of special design, but unlike the shortcoming of conventional flexible suspension easy to shake, its unique triangle suspension under the mode of putting down makes the iron remover put down to the specified height without obvious shaking, and the operation is more stable, and the iron removal is more efficient.

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 low-cost sulfidized nano zero-valent iron synthesized by using pyrite as raw material and application thereof. The low-cost sulfidized nano zero-valent iron is obtained by using cheap pyrite powder as raw material, adding a small amount of anhydrous FeCl3, and through ball milling, drying and hydrogen reduction. The pyrite powder to which a small amount of anhydrous FeCl3 is added is ball milled by using zirconia ball milling beads which are easy to clean but not easy to be polluted, and then the sulfidized nano zero-valent iron is prepared after drying and reduction. By adjusting parameters such as ball powder ratio, FeCl3 addition amount, heating rate and holding time, the low-cost sulfidized nano zero-valent iron with a particle size of 200-300 nm, zero-valent iron content accounting for more than 90% of total iron content and preparation cost being 11% of that of a laboratory liquid-phase synthesis method is prepared. The material can effectively degrade trichloroethylene (TCE) and florfenicol (FF), has a small hydrogen production amount and a high electron efficiency. The preparation method is simple and easy to operate, has a low cost and has a large-scale production prospect, the degradation performance of pollutants is close to that of the laboratory-prepared sulfidized nano zero-valent iron, and far exceeds that of nano zero-valent iron, and therefore the material has a prospect of being applied to actual groundwater pollution remediation.

The invention belongs to the technical field of waste residue resource utilization, and particularly relates to a method for improving the leaching rate of nickel and cobalt residues and the purity of leachate, and the method comprises the following steps: uniformly mixing the nickel and cobalt residues with concentrated sulfuric acid to obtain a roasting raw material; the nickel-cobalt slag is roasted under the continuous dynamic condition, and a roasted product is obtained; and the roasted product obtained in the previous step is mixed with industrial water and an additive for leaching, the pH value is adjusted, filtering is conducted, leaching residues and leaching liquid are obtained, and the content of iron impurities in the leaching liquid is low. According to the method, through sulfating oxidizing roasting and additive adding leaching, the content of nickel and cobalt elements in the leaching solution can be increased, the iron content in the solution can be reduced, the nickel and cobalt leaching rate and the purity of the leaching solution can be increased, and environmental pollution can be reduced.

The invention discloses a cement raw material low-carbon decomposition method. The decomposition method comprises the following steps: carrying out a reaction on a cement raw material and a carbon-containing solid in a reaction furnace system, calcining, crushing, and adding gypsum, the cement raw material comprises calcium carbonate. Carbon-containing solids (coal, coke and biomass charcoal) are mixed with a cement raw material, a one-step reaction from CaCO3 + C to CaO + 2CO is directly carried out in a reaction furnace at 800-900 DEG C, a traditional calcium carbonate thermal decomposition path is replaced, and carbon emission in the process of carbonate is reduced from the source. Carbon monoxide gas generated by the reaction is recycled by a separation system and is used for synthesizing high-value chemicals such as methanol; and calcining the solid-phase product in a rotary kiln to obtain the high-iron-content cement clinker. The method can directly reduce carbon emission in cement production, can produce by-products of chemical raw materials, and has both environmental protection property and economical efficiency.

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.

This invention discloses an aerospace aluminum rod with good ductility and low impurity content, and its preparation method, belonging to the field of metal material processing technology. The aerospace aluminum rod has an aluminum content ≥99.5%, an iron content of 0.20%-0.25%, a silicon content ≤0.04%, and a hydrogen content ≤0.22 ml / 100g Al. By precisely controlling the Fe content within the preferred range of 0.20%-0.25%, combined with multi-stage refining and purification, precise temperature-controlled casting, and surface quality control, this invention significantly reduces the impurity content of the aluminum rod, refines the grain structure, and improves its machinability and ductility. It achieves excellent processing performance, producing 200,000 meters of continuous 0.361mm ultrafine single wire without breakage, making it suitable for the large-scale production of high-end aluminum alloy wire bundles in photovoltaic, new energy vehicle, and other fields.

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 relates to a process for reduction leaching of zinc leaching residues, and belongs to the technical field of metallurgical engineering. The method comprises the following steps: by taking zinc leaching residues produced by zinc hydrometallurgy as objects, sequentially carrying out high-acid pre-leaching of the zinc leaching residues, pre-reduction of zinc sulfide concentrate and deep reduction of sulfur dioxide to obtain deep reduction leaching residues; and the deep reduction leaching residues are subjected to high-acid oxidation leaching, and final leaching residues and high-acid oxidation leaching liquid are obtained. Under the synergistic effect of the process steps and all parameters, the reaction characteristic difference of the fine-grain zinc sulfide concentrate and sulfur dioxide is fully utilized, the consumption of a sulfur dioxide reagent is reduced and the cost is reduced while excessive zinc sulfide concentrate is avoided and the content of zinc and iron in the final leaching slag is reduced; the technical problem that a large amount of gypsum slag is produced due to sulfate radical balancing of a zinc hydrometallurgy system is solved from the source. The method has the advantages that the zinc and iron leaching rate is high, the reagent consumption is low, the reduction degree of ferric ions in the leachate is high, and hydrogen sulfide output is avoided from the source.

The invention discloses a high-yield integrated production method for cigar wrappers. This method builds a “four in one” production facility system that integrates seedling cultivation, transplanting, drying, and fermentation processes of cigar wrapper tobacco leaves. The system has a light intensity of 75-160 μmol / (m2·s), a temperature of 25±5° C. and a relative air humidity of 75%±10%; when transplanting tobacco seedlings, using a nutrient solution, which is a high iron boron nutrient solution with an iron content of 0.3-0.7 mM calculated as Fe and a boron content of 9.5-13.0 mg / L calculated as boric acid. The invention achieves a cigar shell yield of over 65%, a 40% reduction in production facility investment, and a 20% reduction in labor force by accurately regulating the production environment and the supply of growth factors such as nutrients and light.

This invention discloses a method for rapidly adjusting the furnace conditions of a lean-burn electric arc furnace, belonging to the field of pyrometallurgical nickel smelting technology. The method includes: measuring the height of the frozen layer inside the lean-burn electric arc furnace; when the frozen layer height is greater than 650 mm, simultaneously implementing coordinated control operations to reduce the slag oxidation depth (making the converter slag magnetic iron content <25%) and increase the reducing agent addition rate of the lean-burn electric arc furnace; after adjustment, measuring again, if the frozen layer height is less than 600 mm, restoring to normal process parameters; otherwise, repeating the adjustment until the target is met. This invention establishes a rapid response and upstream-downstream coordination mechanism based on the frozen layer as a criterion, which can effectively reduce the magnetic iron content in the slag, quickly eliminate excessively thick frozen layers, significantly improve slag fluidity, and ensure the stable and efficient operation of the lean-burn electric arc furnace system.

This invention discloses a steel-titanium composite material containing a niobium-iron interlayer and its preparation method, belonging to the field of metal protective coating technology. The steel-titanium composite material includes a steel substrate, and a niobium-iron interlayer and a titanium coating sequentially laminated on the surface of the steel substrate; the interfaces between the niobium-iron interlayer and the steel substrate surface, and between the niobium-iron interlayer and the titanium coating, are metallurgically bonded; wherein the iron content in the niobium-iron interlayer is 10-45% by mass. The preparation method involves laser cladding a niobium-iron interlayer onto a surface-treated steel substrate, removing impurities from the niobium-iron interlayer surface, and then laser cladding a titanium coating onto the niobium-iron interlayer surface. The steel-titanium composite material obtained by this invention utilizes the formation of a niobium-titanium solid solution between niobium and titanium. This niobium-titanium solid solution can inhibit the formation of Fe-Ti intermetallic compounds, and iron has good solid solubility in the niobium-titanium solid solution, effectively improving the mechanical properties of the composite material.

This invention discloses a method for measuring the total iron content in EDTA chemical cleaning solution for power plant boilers, relating to the field of chemical cleaning technology for power plant boilers. The method includes: injecting the EDTA cleaning solution into a UV reactor and diluting it with demineralized water; adjusting the pH of the solution in the UV reactor to acidic using hydrochloric acid and ammonia, then adding persulfate solution, heating the reaction, and allowing complete digestion; transferring the solution from the UV reactor to a reaction flask, adding sulfosalicylic acid as an indicator, and titrating with EDTA standard solution until the purple-red color changes to pale yellow as the endpoint, recording the volume of EDTA consumed, and calculating the total iron content in the chemical cleaning solution. This invention features high accuracy, simple operation, and fast detection speed.

The invention relates to a magnetic material comprising at least iron, in metal form and / or in oxide form, at least one oxide matrix, the iron content being between 15% and 70% by weight of iron element relative to the total weight of said material, and at least silicon carbide in its alpha (α-SiC) crystallographic form, characterized in that said material comprises at most 25% by weight of hematite relative to the total weight of said material, said material being in the form of beads or extrudates.

The invention belongs to the technical field of wheat germplasm identification, particularly relates to a wheat grain zinc and iron content marking method and application, discloses four SNP (Single Nucleotide Polymorphism) sites QGZn-4B, QGZn-7B, QGFe-2A and QGFe-3B which are stably associated with the zinc content and the iron content of wheat grains, and solves the core pain points of poor molecular marker stability and indefinite association in the prior art. And a reliable genetic target is provided for accurate identification of the zinc and iron content of wheat. According to the invention, a KASP specific primer combination developed for four SNP loci is also adopted, so that efficient genetic typing of a wheat material is realized, a complicated sequencing process is not needed, the operation is simple and convenient, the specificity is high, and the problems of long detection period, complicated operation and high cost of a traditional molecular marker are effectively avoided. The blank of efficient tools in current wheat zinc and iron content molecular marker assisted breeding is effectively filled, and the method has important significance in promoting innovation and upgrading of a wheat nutritional quality breeding technology.

The utility model discloses a feeding deironing device of a kaolin production beater, and relates to the technical field of kaolin production. The kaolin production beater feeding iron removal device comprises a dust cover and a switchable iron removal device, the switchable iron removal device comprises a fixed plate, a lifting plate, a placement plate, a collection plate, an iron plate, an electromagnet, a permanent magnet, a mounting plate and a hydraulic cylinder, the fixed plate is fixedly connected to the surface of the dust cover, the lifting plate is slidably connected to the surface of the fixed plate, and the placement plate is arranged on the placement plate. The containing plate is fixedly connected to the surface of the lifting plate, the collecting plate is fixedly connected to the surface of the containing plate, the iron plate is fixedly connected to the top of the containing plate, the electromagnet is fixedly connected to the surface of the iron plate, and the permanent magnet is slidably connected to the surface of the iron plate. And an energy-saving permanent magnet iron removal mode can be adopted when the iron content is low, and an efficient electromagnetic iron removal mode can be switched when the iron content is high, so that the energy consumption is obviously reduced.

The invention relates to the technical field of metal materials, and discloses a high-strength and high-hardness die-casting aluminum-silicon alloy material which comprises the following components in percentage by mass: 9-11% of silicon, 0.6-0.9% of iron, 0.1-0.55% of manganese, 0.25-0.5% of magnesium, less than or equal to 0.2% of titanium, less than or equal to 0.15% of nickel, less than or equal to 0.15% of zinc, less than or equal to 0.1% of copper, less than or equal to 0.10% of lead, less than or equal to 0.05% of tin, less than or equal to 0.05% of other single impurities, less than or equal to 0.15% of the total content of other impurities and the balance of aluminum. According to the high-strength and high-hardness die-casting aluminum-silicon alloy material and the preparation process thereof, the content ranges of key elements such as silicon, iron, manganese and magnesium in the alloy are accurately controlled, particularly, the iron content is limited to be 0.6%-0.9%, and the manganese content is limited to be 0.1%-0.55%, so that the strength and hardness of the alloy are remarkably improved, and by forming alpha-Al (Fe, Mn), the high-strength and high-hardness die-casting aluminum-silicon alloy material is prepared. Compared with the prior art, the method has the advantages that generation of harmful beta-AlFeSi phases is effectively inhibited by the (Mn) Si phases, accordingly, the mechanical property and the hot crack tendency of the alloy are improved, generation of MgSi strengthening phases is promoted by optimizing the magnesium content to 0.25%-0.5%, primary aluminum phases and aluminum-silicon eutectic structures of the alloy are refined, and the tensile strength and the yield strength are improved at the same time.

This application relates to a belt-type iron removal device and an iron removal system after crushing electrode paste raw materials. The device includes a belt-type iron removal machine body, a support frame, and an angle adjustment component. The belt-type iron removal machine body includes a mounting frame, several drive rollers, and a drive motor. A magnet is installed inside the mounting frame. The drive rollers are symmetrically distributed above and below the magnet and rotatably connected to the mounting frame. The drive motor is located on one side of the mounting frame, and its output end is connected to any one of the drive rollers. An iron removal belt is fitted over the drive rollers. The bottom of the magnet is flat. The mounting frame and the support frame are rotatably coupled. The angle adjustment component is located at the top of the support frame and is connected to the mounting frame. The angle adjustment component is used to adjust the deflection angle of the mounting frame, so that the magnetic force of the magnet on the iron-containing impurities in the material pile is gradient-distributed along the direction of material movement. This allows for the sequential adsorption and screening of impurities with higher iron content in the upper layer and small to medium-sized impurities with lower iron content pressed in the lower layer.

The invention provides a preparation method of a soluble magnesium alloy with high iron content, and relates to the technical field of soluble magnesium alloys. According to the method, magnesium alloy is put into a low-carbon steel crucible to be sealed and then is subjected to heat preservation treatment at 800 DEG C for 5-15 h. The magnesium melt and the low-carbon steel crucible are subjected to interface reaction at high temperature, iron elements in the low-carbon steel crucible are diffused into the magnesium melt, meanwhile, the solid solubility of iron in magnesium at high temperature is higher than that at normal temperature, and the iron elements in the low-carbon steel crucible are continuously diffused into the magnesium melt through long-time heat preservation at high temperature; and the magnesium melt with the high iron content is formed. According to the diffusion method, the soluble magnesium alloy with the high iron content is formed in situ.