687 results about "Mineral matter" patented technology

The invention discloses coal gangue-based artificial ecological soil and a preparation method and application thereof, and belongs to the technical field of ecological improvement, the coal gangue-based artificial ecological soil comprises crushed coal gangue and a compound microbial agent, and the compound microbial agent comprises a microbial activating agent and a microbial passivating agent. According to the invention, the coal gangue can be quickly decomposed through the microbial activating agent, useful mineral elements in the coal gangue can be fully activated and analyzed, and the effect of activating a nutrient library in the coal gangue is achieved, so that useful trace elements contained in the coal gangue are effectively released and are easily absorbed by plant growth; meanwhile, harmful heavy metal elements in the coal gangue are passivated through the microbial passivating fungicide, the water-retaining property and the air permeability of the soil are guaranteed by controlling the decomposition particle size proportion of the coal gangue, the soil conditioner can be used for ecological restoration, desert control, agriculture and animal husbandry planting, flower and nursery planting and urban landscaping, the effects of improving the soil and promoting plant growth are achieved, and the soil conditioner is suitable for large-scale popularization and application. The application is wide.

The invention belongs to the technical field of soil improvement, and discloses a wormcast biochar-based soil conditioner as well as a preparation method and application thereof. The soil conditioner is prepared from the following raw materials: modified charcoal, wormcast, a seaweed fertilizer, a microbial agent, vermiculite, humic acid, urea and coal gangue. The modified biochar and the wormcast are used as main components, the modified biochar is loaded with potassium and phosphorus, and potassium and phosphorus elements can be slowly released and provided; on one hand, plasma modification can generate oxygen-containing groups and increase active sites, so that heavy metals are complexed, and the removal capacity of the heavy metals is improved; on the other hand, holes in the surface of the biochar can be increased, the specific surface area is increased, the adsorbability is improved, and the biochar can serve as a carrier of components such as microorganisms, wormcast and urea, so that nutrient substances are slowly released in soil. Wormcast contains some bacteria, fungi and the like, promotes plant growth and serves as organic fertilizer together with seaweed fertilizer and humic acid, and the content of organic matter and mineral matter in soil is increased.

The present invention relates to the field of mine surveying and mapping technology, and in particular to a mine surveying and mapping method and system based on unmanned aerial vehicle remote sensing technology, the method comprising: obtaining terrain data of a mine; generating a flight trajectory of an unmanned aerial vehicle; using an unmanned aerial vehicle to collect image data and hyperspectral data of the mine; constructing a three-dimensional surface model of the mine; obtaining geological structure data and mineral distribution data of the mine; and generating a three-dimensional structural model of the mine based on the geological structure data, mineral distribution data and the three-dimensional surface model. The present invention generates a flight trajectory of an unmanned aerial vehicle to ensure that the unmanned aerial vehicle takes photos at a reasonable flight altitude and speed in different areas, thereby reducing repeated coverage and maximizing regional coverage. By generating a three-dimensional structural model, detailed geological structure and mineral distribution data can be obtained without actually entering the mining area, greatly reducing the safety risks and economic costs that may be caused by on-site surveys.

The present invention relates to the extraction of lithium from liquid resources such as natural and synthetic brines, leachate solutions from clays and minerals, and recycled products.

The invention discloses a preparation method of a low-temperature SCR (Selective Catalytic Reduction) catalyst with coke loaded with transition metal oxide. The preparation method comprises the following steps: preparing superfine coal powder; removing mineral substances from the superfine coal powder to obtain ash-removed coal powder; chemically activating the deashed coal powder into an activated coal base; coking the activated coal base to form a coal coke carrier; and preparing a single Fe oxide catalyst and an Fe-Mn composite oxide catalyst which take the coal coke as a carrier. The catalyst is prepared from the coal, so that the utilization value of the coal can be improved, the conversion of the coal from fuel to raw materials can be accelerated, and the pollution of the coal to the environment is reduced. Meanwhile, compared with a noble metal catalyst and coke, the catalyst with the coke carrier prepared by the method disclosed by the invention is lower in price and wide in source, so that the preparation cost of the catalyst can be reduced, and compared with other matrix materials, the coke carrier prepared by the method disclosed by the invention takes superfine pulverized coal coke as a matrix, so that the cost of the catalyst is reduced. The preparation cost is lower, and the pore structure is richer.

The invention provides a method for realizing dynamic balance of source water minerals based on ion coordinated regulation and control, and belongs to the technical field of water treatment. According to the method, multi-parameter coupling regulation and control are achieved by conducting split-flow pretreatment on source water and building a dynamic synergistic coefficient model, the source water is separated to prepare calcium-magnesium compensation liquid, the ion concentration and the water temperature are monitored in real time, and a synergistic coefficient model fusing ion activity factors and the temperature effect is built; a fuzzy PID controller is used for dynamically analyzing pH fluctuation and collaborative deviation to adjust the injection proportion of compensation liquid, and precise mineralization is achieved by combining turbulence mixing intensity optimization; a closed-loop feedback mechanism and a high-frequency liquid supplementing technology are adopted to quickly correct ion concentration deviation, and the dissolution activity of compensation liquid is differentially regulated and controlled through a reverse temperature difference strategy so as to stabilize pH. According to the method, the ion synergistic effect, dynamic algorithm control and dissolution kinetics optimization are combined, the response speed and balance precision of water quality regulation are improved, and the method is suitable for precise mineral regulation and quality optimization of high-quality drinking water.

The invention relates to the technical field of coal bed gas development and gas extraction, in particular to an electrodialysis-liquid CO2 time sequence synergistic anti-reflection method and system. Comprising an electrodialysis pretreatment stage, a CO2 synergetic permeability increasing stage and a process regulation and energy recovery stage, a mixed solution is injected into a coal seam in a pulse injection mode, and energy recovery is conducted through pipeline fluid pressure in the injection stopping period. According to the technical scheme, through multi-stage cooperation of electrodialysis pretreatment, CO2 phase change fracturing and pulse consolidation and regulation, accurate transformation of the coal seam low-permeability area is achieved. According to the scheme, electrodialysis is utilized to drive an acidic working solution to target and migrate to a difficult-to-permeate area, mineral substances are dissolved, and pores are expanded; then, high-energy expansion stress is generated through liquid CO2 phase change, and a through fracture network is formed; and finally, a pulse injection and energy recovery mechanism is adopted, fracture closing is restrained, system energy consumption is reduced, and therefore the coal seam breathability and the gas extraction efficiency are integrally improved.

The invention provides a comprehensive evaluation method for dissemination characteristics of minerals in coal of different particle sizes, and relates to the field of coal quality analysis. The method comprises the following steps: collecting coal analysis samples of different size fractions, and preparing coal polished sections of all the size fractions; the method comprises the following steps: collecting microscopic images, and constructing a representative microscopic image sample database of each size fraction; carrying out size fraction judgment, generating a component segmentation image on a single particle and a component segmentation image on a microscopic image, and extracting dissemination characteristic parameters of mineral substances in coal of each size fraction; key parameters are screened out, and comprehensive evaluation is carried out on the dissemination characteristics of the minerals in the coal of different size fractions. According to the method, an image processing technology and multivariate statistical analysis are combined, and qualitative and quantitative analysis of the dissemination characteristics of the minerals in the coal is achieved. Compared with an existing microscopic image analysis method, the method has the advantages that the human subjective influence and the labor intensity are remarkably reduced, and the analysis result has higher objectivity and reproducibility.

The invention discloses a quantitative calculation method for pore evolution of a tight sandstone reservoir under a polarizing microscope, and relates to the technical field of mineral resource development, and the method comprises the following steps: obtaining pore evolution parameters of a rock casting body slice by using a microscope; determining an initial porosity value based on the percentage ratio of the mineral particles of each particle size; calculating the porosity value of the compacted rock on the basis of the residual intergranular pore surface porosity, the cement content surface porosity and the cement corrosion surface porosity; calculating a compaction coefficient based on the deepest buried depth value of the rock, the initial porosity value and the porosity value of the compacted rock; based on the initial porosity value, the compaction coefficient and the depth values of the rock at the multiple depths, the compaction porosity reduction rate of the rock at the corresponding depth is calculated; calculating the cement porosity reduction rate based on the cement content surface porosity and the cement corrosion hole surface porosity; and calculating the corrosion porosity based on the initial porosity value, the particle corrosion pore surface porosity and the cement corrosion pore surface porosity. According to the method, the pore evolution process of the tight sandstone is reproduced.

The invention belongs to the field of petroleum and natural gas engineering, particularly relates to a method and a system for converting XRF logging elements and mineral content, and aims to solve the problems of long time for judging the mineral content by XRD and low cost performance. The method comprises the steps that XRF logging element and XRD mineral content detection is conducted on a coring sample according to the well depth, and XRF logging element detection data and XRD mineral content detection data are obtained; classifying minerals corresponding to the coring samples to obtain mineral types, extracting elements of the mineral types, and screening the elements to obtain characteristic elements; performing linear regression analysis on the XRF logging element detection data corresponding to the characteristic elements and the XRD mineral content detection data corresponding to the characteristic elements to obtain mineral content models of different mineral types; and substituting XRF logging element data of any well depth into the model to obtain the mineral type content of the well depth. According to the method, the mineral type content can be judged according to the XRF logging elements.

The utility model belongs to the technical field of hydraulic supports, and particularly relates to a hydraulic support bottom lifting device which comprises a rear installation plate, a push rod hinge seat is fixedly connected to one side wall of the rear installation plate, and an electric push rod is hinged to the push rod hinge seat. The two sets of side mounting plates are arranged, the two sets of side mounting plates are arranged on the side, located on the rear mounting plate, of the push rod hinge seat, and a top cover plate is arranged above the side mounting plates; and one side wall of the supporting frame is fixedly connected with the telescopic end of the electric push rod. By arranging the top cover plate, the bottom lifting device can be protected conveniently, the working safety is improved, and mineral coal briquettes are prevented from being clamped on the working bottom lifting device; longitudinal space can be saved conveniently, the hydraulic support is prevented from colliding with the bottom lifting device to be damaged during working, and the safety of the device is improved. Reset assistance can be conveniently carried out on the supporting frame when the electric push rod shrinks and resets, transmission continuity is improved, clamping is avoided, and the device is diversified in function.

The utility model relates to the technical field of ore leaching devices, in particular to an ore leaching feeding calcium and hardening prevention device which is characterized in that ore leaching liquid and crushed mineral substances are stirred to be uniformly mixed by starting a pretreatment mechanism, and dust is prevented from being generated in the conveying process; the mixed ore leaching liquid and mineral substances are discharged into the feeding mechanism, and the feeding mechanism is started to heat the ore leaching liquid and the mineral substances, so that the risk of calcium deposition is reduced, meanwhile, the formation of precipitates is reduced, and the practicability of the equipment is improved; comprising a crushing mechanism; the device further comprises a pretreatment mechanism, a feeding mechanism, an ore leaching mechanism, a cleaning mechanism and a collecting mechanism, the crushing mechanism is installed on the feeding mechanism, the pretreatment mechanism is installed below the crushing mechanism, the pretreatment mechanism is installed above the feeding mechanism, the ore leaching mechanism is located on the right side of the feeding mechanism, and the cleaning mechanism is located behind the feeding mechanism. The collecting mechanism is located below the feeding mechanism.

The invention relates to the technical field of soil amendments, in particular to a production process and equipment of a soil amendment, and the process comprises the following steps: grinding and mixing preparation raw materials based on crystal structure atlas of mineral raw materials and infrared spectrum atlas of organic substance raw materials in the preparation raw materials; grinding the mineral substance raw material to obtain a first mixture, and determining to add an organic substance raw material into the first mixture based on the sphericity degree of particles in the first mixture and the energy consumption per unit mass in the grinding process, based on the dynamic angle of repose of the first mixture, determining the rotating speed of the stirrer after the organic substance raw material is added, and stirring and mixing to obtain a second mixture; whether the production process parameters of the soil conditioner are adjusted or not is determined based on the particle uniformity of the soil conditioner obtained after drying treatment. According to the method, the preparation quality and efficiency are improved by improving the control accuracy of the production process of the soil conditioner.

The invention is suitable for the technical field of water purification, and discloses a mineralization waterway system and a mineral spring mineralization water purifier. The mineralization waterway system comprises a first pipeline, a second pipeline, a mineralization filter element and a suppression filter element, the first pipeline and the second pipeline are arranged in parallel, the mineralization filter element is connected to the first pipeline, and the suppression filter element is connected to the second pipeline. The mineralization waterway system further comprises a series connection switching pipeline used for connecting the restraining filter element and the mineralization filter element in series, the output end of the series connection switching pipeline is connected to the first pipeline or the mineralization filter element, the input end of the series connection switching pipeline is connected to the second pipeline or the restraining filter element, and the series connection switching pipeline is provided with a valve body. According to the mineralized waterway system disclosed by the invention, water containing inhibiting substances enters the mineralized filter element by connecting the switching pipelines in series, and the mineralized filter element is inhibited from releasing minerals, so that the situation that the content of the minerals in the water is too high can be prevented.

A mineral processing system for mineral separation and coarse particle recovery utilizing engineered media, features a first ore size reduction circuit and a second ore size reduction circuit. The first ore size reduction circuit includes a secondary crusher with a combination of a high pressure grinding roll crusher and a screen, and is configured to receive a primary crusher feed from a primary crusher, and provide a first ore size reduction circuit feed having first crushed ore with a first orebody feed size that is less than a primary orebody feed size of the primary crusher feed and in a range of about 6-8 mm. The second ore size reduction circuit is configured to receive the first ore size reduction circuit feed and provide a second ore size reduction circuit feed having second crushed ore with a second orebody feed size less than 1 mm.

The utility model discloses a water cup for preparing hydrogen-rich mineral water, and relates to the technical field of water cups. Comprising a cup body, a cup cover assembly, a ceramic mineralization ball filter material, a base assembly and a hydrogen production assembly. When the hydrogen-rich mineral water is prepared, the water cup is erected firstly, water not exceeding the highest water line is injected into the cup body of the water cup, it is guaranteed that the water does not make contact with the ceramic mineralization ball filter material, at the moment, the hydrogen production assembly is started to produce hydrogen, and after hydrogen production is finished, the water in the cup body becomes hydrogen-rich water containing hydrogen; then, the water cup body is inverted, the hydrogen-rich water permeates into the mineralization cavity through the holes in the bottom of the mineralization cavity to soak the ceramic mineralization ball filter material containing various mineral trace elements, the mineral trace elements in the ceramic mineralization ball can be dissolved into the hydrogen-rich water, and the hydrogen-rich mineral water is obtained.

The utility model relates to a mineralization system and mineralization equipment. The mineralization system comprises a driving module, an extraction module, a heating module and a water storage module, one end of the driving module is connected with a preset water inlet pipeline, the other end of the driving module is connected with a water inlet of the extraction module through the heating module, and a water outlet of the extraction module is connected with the water storage module through the driving module; when the mineral water is extracted, the preset water body is heated, hot extraction is achieved, the mineral water with the preset concentration can be stably produced, the mineral water is stored in the water storage module, the mineral water with the target concentration is provided according to the target water taking instruction, and the water taking requirements of users for mineral water with different concentrations can be flexibly met.

First measurement results are received from a characterization system in an ore processing plant. The first measurement results characterize a sample of mineral rotation feed. A first set of mineral characteristics of the sample of mineral rotation feed are determined based on the first measurement results. Respective similarities are determined between the first set of mineral characteristics and a plurality of predetermined sets of mineral characteristics that are each associated with one or more corresponding sets of rotation treatment parameters. A first set of rotation treatment parameters is selected based on the respective similarities. The first set of rotation treatment parameters is transmitted to a rotation processing system for separation of mineral components according to the first set of rotation treatment parameters.

The disclosure herein sets forth processes and compositions for producing carbonated materials comprising calcium carbonates through a mechanochemical process. The present disclosure concerns the production of calcium carbonate by sequestrating CO2. Certain processes herein include providing alkaline-rich mineral materials that include carbonatable solid wastes such as lime kiln dust, cement kiln dust, and coal combustion residues, and simultaneously fractioning the alkaline-rich mineral materials, while contacting the alkaline-rich mineral materials with a CO2-containing gas in carbonation reactor at low temperature and ambient pressure. In some embodiments, the alkaline-rich mineral materials are partially carbonated before being used in the processes disclosed herein. After contacting the alkaline-rich mineral materials with a CO2-containing gas in carbonation reactor at low temperature and ambient pressure, solid calcium carbonate is produced. In aqueous reactors, the solid calcium carbonate is filtered from a solution in which it precipitated, and the remaining solution includes hydroxide as well as alkaline metal ions. The solution filtered from the solid calcium carbonate can be sequentially contacted with a CO2-containing gas stream to precipitate additional calcium carbonate. The carbonated materials formed from these processes can be used in the form of a slurry, as a moist powder, as a dried powder, as a reactive filler or as a supplementary cementitious material in a mixture that is used to make concrete.

The invention discloses a self-repairing synchronous grouting material and a preparation method thereof, and belongs to the technical field of grouting materials. The self-repairing synchronous grouting material comprises a cement base material, a microbial capsule and chitosan calcium salt, the concrete comprises the following raw materials in parts by mass: 7-12 parts of Portland cement, 20-28 parts of fly ash, 40-55 parts of quartz sand, 20-30 parts of water, 2-7 parts of bentonite, 1-5 parts of microbial capsules and 1-5 parts of chitosan calcium salt. The self-repairing synchronous grouting material disclosed by the invention is combined with a microorganism self-repairing technology, and mineral substances such as calcium carbonate and the like can be generated through metabolic activity of microorganisms when the material has cracks, so that the cracks are automatically filled, and expansion of the cracks on the surface of a concrete material can be effectively prevented; the grouting material can continuously repair microcracks caused by environmental changes or construction stress in the long-term use process, and the integrity and stability of the structure are kept.

The presently disclosed concepts relate to improved techniques for critical mineral extraction, purification, precipitation, ion exchange, and metal production using a solid electrolyte membrane. By using a solid electrolyte embedded in a matrix, alkali metal (such as lithium) can be more effectively separated from feed solutions. Additionally, energy used to initially extract critical minerals from a feed solution may be stored as electrochemical energy, which in turn, may be discharged when critical minerals are depleted from the electrode. This discharged energy may therefore be reclaimed and reused to extract additional critical minerals.

In one aspect, the disclosure relates to a method for recovering critical minerals from a solution, the method comprising: (a) providing a critical mineral solution comprising at least one critical mineral and water; (b) contacting the critical mineral solution with an acid or a base in an amount sufficient enough to adjust the pH to a value of about 2 to about 7; (c) contacting the critical mineral solution with a first modified biochar, forming a first saturated biochar; and (d) desorbing the first saturated biochar, thereby forming a first critical mineral precipitate, a first stripped biochar, and a first aqueous phase. This abstract is intended as a scanning tool for purposes of searching in the particular art and is not intended to be limiting of the present disclosure.

The invention relates to a composite metasilicic acid mineralized filter element profile as well as a preparation method and application thereof, and relates to the technical field of water purifiers, the composite metasilicic acid mineralized filter element profile is prepared from the following raw materials in parts by weight: 60 to 80 parts of metasilicic acid mineralized carbon material and 20 to 40 parts of bonding material; the metasilicic acid mineralized carbon material is prepared from the following raw materials in parts by weight: 30-60 parts of metasilicic acid mineralized powder, 30-60 parts of activated carbon powder, 0.3-2 parts of an antibacterial agent, 0.2-1 part of a pore forming agent and 0.5-5 parts of a stabilizer. According to the composite metasilicic acid mineralization filter element profile provided by the invention, the formula of the filter material is designed, so that the composite metasilicic acid mineralization filter element profile has a good specific surface area, the contact area between active ingredients such as mineralization materials and water is ensured, the composite metasilicic acid mineralization filter element profile not only has the adsorption, harm removal and impurity removal functions of activated carbon, but also can separate out mineral substances, and is beneficial to realizing stable release of metasilicic acid.

The invention relates to the technical field of soil remediation, and particularly discloses a soil remediation agent containing construction waste resourceful treatment substances as well as a preparation method and application of the soil remediation agent. The soil remediation agent disclosed by the invention is prepared from 1.5 to 2.5 parts of construction waste resourceful treatment substances, 0.1 to 0.3 part of mineral substances and 0.6 to 1.0 part of modified kaolin, the preparation method of the construction waste resourceful treatment substance comprises the following steps: performing magnetic separation and winnowing purification on construction waste, crushing, pyrolyzing, soaking in an activating solution, filtering, drying and grinding to obtain the construction waste resourceful treatment substance. A preparation method of the modified kaolin comprises the following steps: uniformly mixing kaolin, corn starch and water, adding compound bacteria, uniformly mixing, fermenting, drying and grinding, thereby obtaining the modified kaolin. The compound bacteria are prepared from bacillus subtilis and bacillus laterosporus. By utilizing the soil remediation agent provided by the invention, the content of available cadmium in soil can be effectively reduced, so that the production safety of plant planting is improved, and the yield of plants can be effectively increased.

The invention relates to the technical field of water treatment equipment, in particular to a waterway system for a mineral spring water purifier, a control method and the mineral spring water purifier. The waterway system for the mineral spring water purifier comprises a mineralization filter material, a water purification device, a water outlet waterway, a backflow waterway, a first control valve and a first water quality detection piece, the first control valve is connected to the water outlet waterway, and the water purification device, the mineralization filter material and the water outlet waterway are sequentially connected in the preset water flow direction; the backflow waterway is connected with the input end of the water purifying device and the water outlet waterway upstream of the first control valve. The first water quality detection piece is connected to the water outlet waterway and located upstream of the first control valve. The first water quality detection piece is used for detecting the mineral content of the water body in the mineralized filter material, the first control valve can be closed to stop discharging water when the mineral content is too high, the water body in the mineralized filter material is replaced, and the water body with the too high mineral content flows into the water purification device through the backflow water path to be purified again; the problem that the mineral content in water output by the water outlet way is too high can be effectively solved.

A process for water, mineral, and / or organics recovery, as well as devices and systems that practice the process, are disclosed. The process may include providing a plurality of evaporator structures, each structure physically separated from the others, and contacting the first end of each evaporator structure with a liquid containing a plurality of materials (such as a solvent and one or more minerals). The process may include allowing capillary forces and siphonic action to draw at least one material of the plurality of materials (which may be, e.g., the solvent, a volatile organic material, and / or a mineral) from the first end towards the second end, and evaporating one or more of the plurality of materials by transferring at least one form of environmental energy (such as solar energy, wind energy, and / or ambient heat of air) directly to each evaporator structure, thereby providing the latent heat of vaporization.

The presently disclosed concepts relate to improved techniques for critical mineral extraction, purification, precipitation, ion exchange, and metal production using a solid electrolyte membrane. By using a solid electrolyte embedded in a matrix, alkali metal (such as lithium) can be more effectively separated from feed solutions. Additionally, energy used to initially extract critical minerals from a feed solution may be stored as electrochemical energy, which in turn, may be discharged when critical minerals are depleted from the electrode. This discharged energy may therefore be reclaimed and reused to extract additional critical minerals.

The invention relates to a mortar or concrete composition comprising aggregates and a mineral binder, said mineral binder comprising activated clay particles made by subjecting powdered clay to a treatment with an acidic solution, then to a washing step, and then to a calcination step.

The invention provides material mixing equipment for mineral insulated cable knob insulator processing, and belongs to the technical field of insulated cable knob insulator material mixing equipment.The material mixing equipment comprises a material mixing tank and further comprises a material mixing assembly and a rolling static electricity removing assembly; due to the design of the lantern-shaped stirring paddle, materials in the mixing tank can be more effectively stirred, and the mixing uniformity and no powder residue are ensured by combining the scraping effect of the scraping plate on the inner wall of the mixing tank and the upper side wall of the guide table; by means of the physical grinding effect of the grinding roller, caked powder balls can be ground, large particles or impurities in magnesium oxide powder can be effectively removed in cooperation with the screening function of the conical filter cylinder, meanwhile, static electricity in the powder can be efficiently removed through an electrostatic adsorption rod on the grinding roller, and potential safety hazards such as dust agglomeration and explosion caused by static electricity accumulation are prevented; the transmission shaft is subjected to multi-layer supporting design, so that jumping and shaking of the transmission shaft during high-speed rotation are effectively reduced, collision with the inner wall of the mixing tank is avoided, and the overall stability and safety of equipment are improved.

The invention provides a process method for preparing nanoscale ultra-pure coal by a one-step method, which comprises the following steps: (1) feeding raw material coal into a steam mill, introducing superheated steam into the steam mill in the presence of an agglomeration agent, performing high-speed collision crushing on the superheated steam and the raw material coal, and then separating; (2) the separated materials are separated through a cyclone separator, mineral substances are discharged from the top of the cyclone separator along with steam, coal granules are obtained at the bottom of the cyclone separator, and after the coal granules are dried through hot steam, nanoscale ultra-pure coal powder and an agglomeration agent are obtained; wherein the temperature of the superheated steam ranges from 280 DEG C to 350 DEG C, and the temperature of an outlet of the steam mill ranges from 130 DEG C to 180 DEG C; the boiling point of the agglomeration agent is 180-300 DEG C. According to the method, the temperature difference of the inlet and the outlet of the steam mill is utilized, combination and separation of the superfine pulverized coal and the agglomeration agent are achieved, the technological process is simplified, meanwhile, direct heat exchange is achieved in the evaporation and condensation processes of the agglomeration agent, and the heat efficiency of the whole process is improved.