221 results about "Iron content" patented technology

A golf club head has a loft no less than 38°. The golf club head also comprises a material having a material composition that includes an Iron content that by weight is highest of all constituents. The material composition also has a Chromium content no less than 10.5% by weight and a Nickel content no greater than 0.5% by weight.

The invention discloses a method for preparing high-purity quartz and recovering an iron element based on high-silicon tailings, and belongs to the technical field of comprehensive utilization of resources and preparation of high-purity quartz. According to the method, high-silicon tailings are sequentially subjected to mineral dissociation, low-magnetic-field roughing, high-magnetic-field scavenging, flotation and ultrasonic acid leaching treatment, and refined quartz is obtained; and carrying out multi-stage gradient chloridizing roasting and hot-pressing acid leaching treatment on the refined quartz of which the gas-liquid inclusion index and transparency meet the requirements to finally prepare the high-purity quartz of which the SiO2 purity is greater than or equal to 99.995%. In addition, for strong magnetic minerals generated in the magnetic separation process, the iron content of the strong magnetic minerals reaches the standard, the strong magnetic minerals react with the acid leaching filtrate under the ultrasonic strengthening condition to leach iron ions, and iron-rich filtrate is subjected to an iron precipitation reaction to generate iron carbonyl. The method provided by the invention not only provides a reliable judgment basis and a complete technical route for preparing high-purity quartz from the high-silicon tailings, but also opens up a new way for resource utilization of the tailings, and has remarkable industrial application value and environmental benefits.

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 agriculture, in particular to an iron-rich yield-increasing foliar fertilizer for rice as well as a preparation method and an application method of the iron-rich yield-increasing foliar fertilizer. According to the specific technical scheme, the iron-rich yield-increasing leaf fertilizer for the rice is prepared from, by mass, 15%-25% of porous chitosan, 20%-30% of L-malic acid and 45%-55% of ferrous sulfate. The technical problem that in the prior art, the cadmium content of brown rice cannot be reduced while the iron content cannot be increased through a leaf fertilizer is solved.

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

The invention discloses a method for reducing the content of iron in rare earth chloride, which comprises the following steps: step 1, adding alkali slurry into heavy sand slurry containing ferrous ions to adjust the pH value to 1-2, then adding an oxidizing agent, and reacting for 2-3 hours at the temperature of 30-45 DEG C to oxidize the ferrous ions into ferric ions to obtain first rare earth slurry, the concentration of ferrous ions is 0.1-0.2 g / L; 2, the pH value of the first rare earth slurry is adjusted to 3.8-4.2, a reaction is conducted for 1.5-2.5 h at the temperature of 62-68 DEG C, so that ferric ions form precipitates, and second rare earth slurry is obtained; 3, carrying out solid-liquid separation on the second rare earth slurry to obtain an optimal solution filtrate and a filter cake; and step 4, performing removal, solid-liquid separation, evaporation and concentration on the optimal solution filtrate to obtain a rare earth chloride product with the iron content lower than 0.05%. The invention aims to introduce hydrogen peroxide in the thorium neutralization and deposition stage to reduce the accumulation of iron impurities in the circulation process.

The invention discloses a method for preparing nano calcium carbonate by efficiently removing iron impurities in nano calcium carbonate raw material ore, and belongs to the technical field of nano material preparation. The method comprises the steps of raw material pretreatment, digestion treatment, size mixing treatment, carbonization treatment, surface treatment and drying, in the size mixing treatment process, a whitening agent Na2SO3 is adopted for removing iron in raw material ore, Na2SO3 serves as a reducing agent, Fe < 3 + > is reduced into Fe < 2 + >, a proper amount of whitening auxiliary such as DTPA or triethanolamine forms colorless water-containing iron chelate ions with iron ions, and the iron chelate ions are subjected to surface treatment. And through a synergistic system of the whitening agent and the whitening auxiliary agent, efficient removal of iron is realized. The whiteness of the prepared nano calcium carbonate reaches up to 97.2%, the nano calcium carbonate has the remarkable advantages of being efficient, environmentally friendly, economical and the like, the iron content in the nano calcium carbonate can be remarkably reduced, the purity and whiteness of the product are effectively improved, and the high requirement of the high-end application field for the quality of the nano calcium carbonate is met. Meanwhile, the method is simple and convenient to operate and easy to industrially apply, and has wide market prospects and popularization value.

This invention provides a coal mine wastewater retreatment device, comprising a treatment tank with two sets of symmetrically distributed support legs fixed at the bottom. A filter screen is installed inside the treatment tank. An inlet pipe is connected to the top of one side of the treatment tank, and an outlet pipe is connected to the bottom of the other side. An adsorption mechanism for removing iron-containing impurities is installed at the top of the treatment tank, comprising a magnetic column with two symmetrically distributed circular plates fixed to its outer side. The coal mine wastewater retreatment device provided by this invention solves the problem that existing treatment devices' filters are limited to filtering coal slag and are not suitable for cleaning iron-containing impurities in coal mine wastewater. This results in iron-containing impurities mixing inside the coal mine wastewater and entering the environment along with the wastewater discharge, leading to high iron content in the environmental water and making the water prone to turbidity due to reaction with oxygen in the air.

The invention discloses a preparation method of a high-loading-capacity iron diatom catalyst, which is characterized in that iron nitrate nonahydrate and small biological molecule guanine are used as raw materials, and the iron diatom catalyst is directly synthesized through self-assembly and high-temperature pyrolysis methods. The synthesis process is simple to operate, low in manufacturing cost and high in sustainability, the obtained material has curled two-dimensional morphology, high nitrogen content (22-32 at%) and metal loading capacity (the highest iron content can reach 9.7 wt%), and the conversion rate of 92.3% and the selectivity of 96.2% can be achieved in the reaction for preparing phenol through selective oxidation of benzene.

The invention belongs to the technical field of zinc smelting, and discloses a method for producing a high-zinc high-iron acid solution through zinc hydrometallurgy and removing iron in an oxygen pressure kettle at medium temperature. According to the oxygen-enriched pressurized direct leaching process based on zinc hydrometallurgy, in order to improve various economic and technical indexes, a high-zinc and high-iron acid solution is produced after process technology optimization is carried out. Then, the first-stage high-zinc high-iron acid solution is treated, an oxygen pressure kettle medium-temperature iron removal method is adopted, the iron content of the obtained iron-removed solution is 0.5-1.5 g / L, the iron-removed solution is fed to neutralization iron removal operation, the dosage of a neutralizer and the dosage of an oxidizing agent are reduced, and a qualified iron-removed supernatant solution is obtained; and hematite with iron content of more than or equal to 55% in the slag sample is obtained, and byproducts have value of sale. According to the method, efficient separation of zinc and iron is achieved, the slag rate of the system is reduced, and safe, continuous and stable operation of the full-wet-process pressure leaching zinc smelting system is guaranteed.

The invention relates to the field of glass detection, and particularly discloses a method for testing the content ratio of ferrous iron to ferric iron in glass. The method specifically comprises the following steps: washing a to-be-detected glass sample, grinding into micro powder, drying, respectively taking the same amount of glass micro powder, and marking as a sample 1 and a sample 2; divalent iron can be converted into ferric iron by adding perchloric acid into the sample 1, and the test result is the content of total iron in the glass. And dimethyl silicone oil is added into the sample 2 so as to isolate air and prevent ferrous iron from being oxidized into ferric iron in the testing process to influence the experiment result. According to the method, the proportion of Fe < 2 + > to Fe < 3 + > in an unknown glass sample can be simply and quickly obtained, the result is accurate and reliable, the test period is short, and the working efficiency is greatly improved.

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 relates to a composition of a nickel superalloy consisting of: - an aluminum content by mass of between 0% and 0.5%, - a cobalt content by mass of between 0% and 12%, - a chromium content by mass of between 14% and 20%, - an iron content by mass of between 0% and 10%, - a molybdenum content by mass of between 0% and 2%, - a niobium content by mass of between 0% and 1%, - a tantalum content by mass of between 13% and 17%, - a titanium content by mass of between 0% and 1%, - a tungsten content by mass of between 0% and 3%, - a carbon content by mass of between 0% and 0.05%, - a manganese content by mass of between 0% and 0.5%, - a silicon content by mass of between 0% and 0.5%, as well as unavoidable impurities and the balance being nickel.

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.

The application discloses an online regeneration type iron ion specific adsorption removal device, which is applied to SCAL type surface condensation type intercooling circulating water treatment of a thermal power plant. The device comprises a bypass pipeline unit, double adsorption treatment units, a bypass backwashing unit, a regeneration liquid unit and the like. The double adsorption treatment units are connected in series between water chambers at the inlet and outlet of a condenser, and the main cycle does not need to be interrupted. The double adsorption treatment units are arranged in parallel and all adopt a three-stage adsorption tank series structure. A monitoring unit monitors iron content of inlet and outlet water, and a control system links all units to realize automatic control. The device removes iron ions efficiently through three-stage gradient adsorption and double-unit alternating online regeneration, synchronously realizes iron product resourceization and wastewater zero discharge, solves the pain points in the prior art, such as poor removal of weak magnetic fine iron, and the fact that adsorption medium cannot be regenerated online, and the like, and is stable in operation and high in automation degree.

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.

This invention relates to a process for extracting high-white feldspar from lithium-containing kaolin ore, comprising: Step S1, grinding and classifying the lithium-containing kaolin ore, using a high-frequency screen for inspection and screening, merging the undersize material with the overflow from a hydrocyclone, and then feeding it into a weak magnetic separator for iron removal, while the oversize material continues to be ground in a ball mill; Step S2, subjecting the material obtained after iron removal in Step S1 to a first-stage high-gradient magnetic separation; Step S3, controlling the non-magnetic material obtained in Step S2 to enter a second-stage high-gradient magnetic separation; Step S4, subjecting the non-magnetic material obtained in Step S3 to desliming in a hydrocyclone and then entering the flotation stage; Step S5, proceeding to the roughing operation; Step S6, feeding the roughing tailings from Step S5 into the scavenging operation; Step S7, feeding the scavenging tailings from Step S6 into the scavenging operation, obtaining high-white feldspar as the scavenging tailings. This invention achieves high-white feldspar with low iron content and improves the recovery rate of lepidolite.

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 relates to the technical field of vanadium metallurgy, and discloses a vanadium slag cooling and tapping technological process which comprises the following steps: turning vanadium slag obtained after steelmaking and vanadium extraction into a tank; preliminarily controlling the size and the temperature of the vanadium slag after tank turning; the vanadium slag is filtered in a magnetic separation mode; the filtered vanadium slag is controlled again, and the particle size and the magnetic iron content of the vanadium slag are determined; and roasting the vanadium slag. According to the scheme, the vanadium slag is turned over, the natural cooling time of the vanadium slag in the tank is shortened, and therefore a large amount of vanadium slag is prevented from caking, that is, the situation that slag is included in iron and iron is wrapped in slag in the vanadium slag is effectively avoided, the probability that the vanadium slag is inexhaustible is reduced, and a foundation is provided for follow-up screening of the iron content in the vanadium slag. And the content of magnetic iron in the vanadium slag is further reduced through subsequent multi-stage control and filtration of the vanadium slag, so that the conditions of frequent iron clamping and scratching of a conveying belt are avoided, the production efficiency is improved, and the equipment loss and the failure rate are reduced.

The utility model discloses a device for recycling scattered slag under a converter, which belongs to the technical field of steel production and comprises a retaining wall, a steel sieve and a driving device. And a blanking area is defined by the retaining wall. One end of the steel screen is hinged to the retaining wall and arranged on the top of the blanking area. The driving device is used for driving the steel screen to rotate. According to the recovery device, large steel slag blocks in bulk furnace slag with high iron content and furnace slag particles with high iron content can be screened out on a production site according to needs through the steel screen. Steel slag blocks in bulk slag under the converter with higher iron content can be added into the converter along with the waste steel through a waste steel hopper; under-furnace scattered slag particles with high iron content are conveyed to the high-level bunker of the converter through the feeding system and added into the converter from the high-level bunker of the converter as required, the under-furnace scattered slag particles can be added as required when the slag is returned to be dry, iron elements in the under-furnace scattered slag can be recycled, and consumption of steel and iron materials of the converter is 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 application relates to the field of environmental protection material and carbon capture technology, in particular to a kind of red mud-based carbon dioxide capture adsorbent and its preparation method.It is composed of the following components by weight: activated red mud 60~80 parts;Alkali metal modification component 15~30 parts;Porous carrier 5~10 parts;Binder 3~8 parts;Auxiliary activator 2~5 parts.Activated red mud is obtained by removing iron from bayer process red mud by magnetic separation to iron content≤5wt%, then drying, calcining and crushing.The preparation method includes raw material pretreatment, mixing and dispersion, molding, activation and cooling.The obtained adsorbent has a static adsorption capacity for CO2≥2.8mmol / g, a 20-cycle retention rate≥90%, a compressive strength≥8MPa, and a raw material cost of 800~1200 yuan / t, realizing high-value utilization of red mud and low-cost carbon capture, and being suitable for flue gas CO2 capture in power generation, steel, coal chemical industry and other industries.