193 results about "Activated Coal" patented technology

The invention belongs to the technical field of desiliconized fly ash, and particularly relates to a high-alumina-silica-ratio material capable of replacing bauxite as well as a preparation method and application of the high-alumina-silica-ratio material. The preparation method comprises the following steps: S1, crushing coal gangue, and grinding the crushed coal gangue until the particle size is less than 40 meshes to obtain a ground material; s2, mixing the ground material and a catalyst according to a weight ratio of 100: (1-2), roasting, and cooling to obtain activated coal gangue; the catalyst comprises sodium carbonate, calcium oxide and aluminum oxide in a weight ratio of 1: (0.3-0.5): (1.4-1.6); s3, mixing a sodium hydroxide solution, the activated coal gangue and a surfactant, and reacting at 50-90 DEG C for 1-6 hours to obtain desiliconized slurry; and S4, filtering the desiliconized slurry, collecting a solid phase, washing with water, and drying to obtain desiliconized fly ash, namely the high alumina-silica ratio material capable of replacing bauxite. The method is high in desiliconization rate.

The invention relates to the technical field of mine ventilation equipment, and discloses coal mine dust removal ventilation equipment which comprises an air pipe, an air draft assembly used for air draft is arranged at the top of a bottom plate of an inner cavity of the air pipe, a collecting assembly used for dust removal is arranged in the air pipe, and the collecting assembly comprises a lower baffle and an upper baffle. The lower baffle and the upper baffle are fixed to one side of a bottom plate and one side of a top plate of an inner cavity of the air pipe correspondingly, an air cylinder is fixed to the surface of the middle position of the upper baffle, an output shaft of the air cylinder penetrates through the top of the air pipe, a linkage plate is rotationally connected to the top of the output shaft of the air cylinder, and a magnetic sheet set is inlaid in the bottom of the linkage plate. According to the exhaust fan, the activated carbon box set is arranged in the air pipe, when the exhaust assembly conducts exhaust type ventilation, after air enters the air pipe, dehumidification and dust removal are conducted through activated carbon particles in the activated carbon box set, the influence of dust and moisture on an impeller of the exhaust fan is reduced, and then the ventilation efficiency of the exhaust fan is improved.

The invention discloses a method for preparing a soil conditioner based on infrared activation of coal gangue. The method comprises the following steps: S1, preparing activated coal gangue; s2, mixing the activated coal gangue with a slow-release fertilizer and modified zeolite, performing extrusion granulation to obtain basic particles, diluting a long-acting composite microbial inoculum with deionized water to obtain a microbial inoculum suspension, spraying the microbial inoculum suspension on the surfaces of the basic particles in a low-temperature spraying manner, and performing low-temperature drying to obtain a core material; s3, mixing the activated coal gangue with kaolin, humic acid, calcium hydrogen phosphate, sodium alginate and water to obtain coating slurry, and coating the core material with the coating slurry to obtain a shell-core material; s4, mixing the modified activated coal gangue with polyvinyl alcohol, talcum powder, a composite additive and water to obtain outer coating slurry, and coating the outer coating slurry on the core-shell material to obtain the soil conditioner. According to the method, the coal gangue is subjected to infrared activation treatment and then prepared into the soil conditioner with a high additional value, and waste resource utilization is achieved.

The invention discloses a method for preparing high-performance cement mortar based on NaOH activated coal gangue, which comprises the following steps: putting preliminarily crushed coal gangue into a rod mill for crushing and screening to obtain undersize coal gangue and oversize coal gangue; calcining the treated coal gangue, and putting the calcined product into a rod mill for fine grinding to obtain an admixture; weighing the admixture and the cement in proportion, and uniformly stirring and mixing to obtain a cementing material; the preparation method comprises the following steps: pouring a cementing material and gravel into a stirrer according to a mortar ratio, uniformly stirring, dissolving an exciting agent NaOH and a water reducing agent into water, pouring into the stirrer, and uniformly stirring the mixed materials to obtain the final high-performance cement mortar. The coal gangue is calcined and ground by a rod mill to serve as the admixture to replace part of the Portland fly ash cement, and the exciting agent NaOH is added, so that the bending strength and the compressive strength of a test piece added with the exciting agent NaOH are increased, and the admixture is effectively excited and activated by the NaOH.

The invention belongs to the technical field of carbon materials, and relates to a coal pre-oxidation treatment-based high-layer spacing porous carbon material and a preparation method thereof.A large number of oxygen-containing functional groups are constructed in coal through low-temperature pre-oxidation, and a cross-linked structure is constructed through the oxygen-containing functional groups in the coal low-temperature pyrolysis process; free movement, stacking and growth of aromatic lamellas are inhibited, a graphitization process of a carbon material is hindered, a foundation is laid for improvement of interlayer spacing, carbon is activated and etched by adopting excessive carbonate with relatively weak corrosivity, a large number of graded pore structures are generated, activated carbon with high specific surface area is generated, an oxygen-containing functional group structure generated by coal pre-oxidation is generated, and the carbon material is prepared. And uniform generation of subsequent pore structures is also facilitated. The coal-based carbon material obtained by coupling pre-oxidation with medium-temperature carbonate activation has higher interlayer spacing and specific surface area, and has a hierarchical porous structure.

The purpose of this invention is to provide a method for preparing cemented backfill materials based on response surface methodology using composite activating coal gasification slag. This method belongs to the field of mining engineering technology. Based on sorting and removing impurities from the coal gasification slag and drying it, the invention obtains ultrafine powder of the coal gasification slag for preparing the backfill material through ball milling. Then, coal gangue is crushed and screened using a crusher to obtain coarse, medium, and fine aggregates for the backfill material. Finally, cement, ultrafine coal gasification slag powder, coal gangue aggregate, activator, and water are mixed evenly to prepare the cemented backfill material. This invention not only solves the problem of low activity of coal gasification slag volcanic ash but also effectively controls the shortage of cemented backfill materials and high backfilling costs during cemented backfill mining, ensuring sustainable development. Furthermore, it effectively utilizes the widely accumulated coal gasification slag, reducing pollution and large-scale land occupation of the surrounding environment.

The invention belongs to the technical field of carbon materials, and discloses coal-based porous carbon based on trace salt induction activation and a preparation method thereof. The preparation method of the coal-based porous carbon based on trace salt induced activation comprises the following steps: uniformly mixing Zhundong coal and trace salt to obtain a mixed product, heating the mixed product in an inert atmosphere and then keeping the temperature constant to obtain a carbonized product, and cooling the carbonized product to room temperature in an active atmosphere to obtain activated carbon, sequentially carrying out acid pickling and drying treatment on activated carbon to obtain coal-based porous carbon; the catalytic action of positive ions in trace active salt and the induction action of negative ions can be combined, so that the action effect of the trace salt is further improved, the activation rate is increased, the distribution of a pore structure is regulated and controlled, the specific surface area of the coal-based porous carbon is increased, and the pore structure is also improved.

The utility model provides honeycomb activated carbon multi-component cutting equipment which comprises a supporting frame, a control device arranged on one side of the supporting frame and a conveying belt installed on the supporting frame, the supporting frame is further provided with a longitudinal cutting device and a transverse cutting device, and the longitudinal cutting device and the transverse cutting device are both located above the conveying belt. The device is used for cutting honeycomb-shaped coal slime on a conveying belt. Two sensors are arranged on the inner side of the supporting frame. The sensor sends electric signals to the control device, and the control device starts the longitudinal cutting device and the transverse cutting device. The whole large honeycomb coal slime is cut into a plurality of honeycomb coal slime blocks with small sizes through the longitudinal cutting device and the transverse cutting device, and then the honeycomb coal slime blocks can be used daily after being dried, carbonized and cremated subsequently. The longitudinal cutting device and the transverse cutting device achieve automatic cutting of the machine, and compared with manual cutting, the production efficiency is improved, and the labor cost is reduced.

The invention discloses geopolymer cement based on coal gangue activation reaction as well as a preparation method and application thereof, and relates to the technical field of building materials. The invention relates to a coal gangue concrete, which is prepared from the following raw materials in percentage by mass: 50 to 70 percent of activated coal gangue powder, 5 to 15 percent of alkali activator, 10 to 30 percent of auxiliary cementing material and water, wherein the water accounts for 30 to 40 percent of the total mass of the activated coal gangue powder, the alkali activator and the auxiliary cementing material. Through a composite activation process of medium-temperature calcination decarburization and superfine grinding, the activity of silicon-aluminum components in the coal gangue is effectively excited, the reaction efficiency is remarkably improved, the mixing amount of the coal gangue reaches 50%-70%, the resource utilization rate of solid waste is greatly increased, and efficient activation and resource utilization of the coal gangue are achieved. By adopting the methyl sodium silicate and sodium silicate composite activator, the reaction rate and the product structure are regulated and controlled, and the workability and the setting and hardening behaviors of slurry are improved, so that the obtained geopolymer cement has relatively high early and later strength and excellent durability.

The invention relates to the technical field of weathered coal processing, in particular to a humic acid co-production process for pre-selection optimization of weathered coal. The process comprises a pre-selection device, a reaction device, a solid-liquid separation device, a drying device, a heat supply device and a control system. The weathered coal is accurately graded through the weathered coal multi-stage screening device and the weathered coal winnowing device, impurities are removed through the weathered coal feeder and the sodium hydroxide and other additive filling device, solid-liquid separation is conducted through the centrifugal separator, drying treatment is conducted through the humic acid drying machine, and humic acid and activated carbon are generated through the coal-fired steam boiler. The intelligent control system adjusts operation parameters of all devices through the central processing unit, and the resource utilization rate, the energy efficiency and the product quality are improved.

The invention relates to the technical field of metallurgy, in particular to a high-aluminum coal gangue desiliconization method which comprises the following steps: crushing and grinding high-aluminum coal gangue to obtain pretreated high-aluminum coal gangue; roasting and cooling the pretreated high-aluminum coal gangue to obtain activated coal gangue; mixing a sodium hydroxide solution with the activated coal gangue for reaction to obtain desiliconized slurry; filtering the desiliconized slurry, wherein a liquid phase is a sodium silicate solution; and washing the solid phase with water, and drying to obtain the desiliconized fly ash. The coal gangue selected by the invention is high-aluminum coal gangue, the aluminum content of the raw ore is 35-38%, the aluminum-silicon ratio of the raw ore is 0.8-0.9, the aluminum-silicon ratio after roasting activation reaches 0.85-0.95, and the aluminum-silicon ratio after one-step desiliconization can reach 5-8. Compared with the existing desiliconization technology, the technology not only can greatly improve the aluminum-silicon specific speed, but also can replace bauxite to be used as a raw material for preparing aluminum oxide by a Bayer process, so that the production cost is greatly reduced, and the utilization rate of resources is improved.

The invention relates to the technical field of zeolite molecular sieve production, in particular to a method for synthesizing a zeolite molecular sieve through solid waste coal gangue in-situ crystallization. The method comprises the following steps: roasting coal gangue at 600-800 DEG C for 1-5 hours to obtain roasted coal gangue; mixing the coal gangue with acid and water in a ratio of 1: (0.1-0.5): (4-8), reacting at 65-95 DEG C for 1-5 hours, dropping alkali to adjust the pH value to 7-10, aging, filtering, washing and drying to obtain activated coal gangue; mixing the activated coal gangue with an external source, a template agent, a solid-phase seed crystal (the crystallinity is greater than or equal to 85%) and water in proportion, crystallizing for 24-72 hours at the temperature of 100-200 DEG C, roasting to obtain SAPO-34, SSZ-13 or AlPO4-5, and adding ammonium salt for ion exchange to prepare an MTO catalyst. The crystallization degree of the molecular sieve is improved, the methanol conversion rate of the MTO catalyst is larger than or equal to 96%, coal gangue recycling is achieved, cost is reduced, and the technology is universal and suitable for industrialization.

The invention discloses a solid-waste-based grouting material for mine roof contact filling and a preparation method. The solid-waste-based grouting material comprises 30-44 parts of steel slag powder, 25-39 parts of fly ash, 8-15 parts of desulfurized gypsum, 10-24 parts of activated coal gangue powder and 13-18 parts of an alkali activator. The mass ratio of the alkali activator water glass to the sodium hydroxide is 1.5-2.5; the content of free calcium oxide f-CaO required by the steel slag powder is lt; the specific surface area is greater than or equal to 700m < 2 > / kg; the activated coal gangue powder is prepared by calcining coal gangue at 650-750 DEG C for 1-2 hours, removing organic matters and activated silicon-aluminum components, and grinding until the specific surface area is greater than or equal to 500m / kg. The fluidity of the obtained material is 260-310 mm, the 3d compressive strength is larger than or equal to 7.2 MPa, and the 28d shrinkage rate lt is achieved; the solid waste utilization rate is greater than or equal to 90%, and the cost is reduced by more than 35% compared with that of the traditional material. The material is used for mine filling roof contact, has the characteristics of good fluidity, rapid hardening, appropriate early strength, excellent volume stability, environmental friendliness and low cost, and has wide application prospects.

The invention provides a method for preparing a poly-aluminum and functional silicon material by activating coal gasification slag and waste hydrochloric acid through microwave synergistic mechanical force, and belongs to the technical field of industrial solid waste recycling. The method comprises the following steps that the coal gasification slag is sequentially subjected to microwave radiation treatment and ball milling, activated slag and waste hydrochloric acid are subjected to an acid leaching reaction, and aluminum-iron-containing leachate and silicon-rich slag are obtained; extracting the aluminum-iron-containing leaching solution to obtain an iron-rich organic phase and a purified aluminum chloride solution; performing thermal polymerization reaction on the purified aluminum chloride solution to obtain polyaluminum chloride; the method comprises the following steps: carrying out alkaline leaching reaction on silicon-rich slag and waste alkali liquor, adding a structure-directing agent into a sodium silicate solution, and sequentially carrying out aging, solution pH value adjustment and crystallization precipitation to obtain mesoporous silica. According to the method, the aluminum-silicon leaching rate is remarkably increased through microwave-mechanical force synergistic activation, synergistic and efficient treatment of the three kinds of waste including the coal gasification slag, the waste hydrochloric acid and the waste alkali liquid is achieved, the technological process is closed, the product additional value is high, and the environmental and economic benefits are remarkable.

The invention belongs to the technical field of coal gangue refined comprehensive utilization, and particularly relates to a process for preparing aluminum oxide by coal gangue decarburization activation acid leaching, which comprises the following steps: multi-stage activation, circular salt separation, catalytic alkalization, directional crystallization, oxygen-controlled roasting, magnetic separation impurity removal, flue gas reuse and the like. Efficient extraction of aluminum and deep removal of impurities in the coal gangue are achieved, and the final product aluminum oxide is high in purity, low in impurity content and fine and uniform in granularity and meets the metallurgical-grade aluminum oxide standard. The invention provides an industrial feasible scheme for high-value utilization of the coal gangue.

The invention relates to a coal gangue-based soil water retention material and a preparation method and application thereof, and the preparation method comprises the following steps: (1) carrying out hydrothermal treatment on coal gangue to obtain activated coal gangue; (2) carrying out modification treatment on the activated coal gangue in the step (1) by adopting microorganisms to obtain microorganism modified coal gangue; and (3) mixing the microorganism modified coal gangue in the step (2) with fly ash and humic acid for reaction to obtain the coal gangue-based soil water retention material. According to the preparation method provided by the invention, the coal gangue is sequentially subjected to hydrothermal activation, microbial modification and mixing reaction with the fly ash and the humic acid to obtain the coal gangue-based soil water retention material, the method is short in preparation process and low in cost, the product is environment-friendly, and a'micro reservoir and water storage network 'is constructed through activation, modification treatment and functional group modification; the obtained material can remarkably improve the water retention and moisture conservation performance of soil, and ecological utilization of coal gangue is achieved synchronously.

The invention relates to the technical field of building materials, and particularly discloses coal gangue doped cement and a preparation process thereof. The coal gangue doped cement is prepared from the following raw materials in parts by mass: 20-30 parts of activated coal gangue powder, 50-60 parts of cement clinker, 15-20 parts of slag powder, 1.5-2.5 parts of nano calcium carbonate, 0.8-1.5 parts of calcium sulphoaluminate, 3-5 parts of a composite curing agent, 4-9 parts of a composite exciting agent, 3-5 parts of water glass and 0.5-1 part of a water reducing agent, the activated coal gangue powder is prepared through urea pretreatment, segmented calcination and acid salt activation; the composite curing agent comprises silica fume and organic acid; the composite exciting agent comprises gypsum and triethanolamine. The coal gangue doped cement prepared by the invention has relatively excellent compressive strength and breaking strength.

The invention discloses an integrated method for realizing sand prevention and stabilization and soil improvement based on coal gangue, which comprises the following specific steps: crushing the coal gangue, grading and screening, taking the coal gangue with the particle size of 0.1-10 mm, and adding bacillus thuringiensis and a compound additive into the coal gangue for activating treatment; the activated coal gangue is mixed with sand grains, then the coal gangue with the grain size being 10-100 mm is laid on the desert earth surface, and integrated treatment is completed; under the combined action of the bacillus thuringiensis and the compound additive, degradation of the coal gangue is accelerated to form a fine particle matrix, and organic matters contained in the coal gangue are synchronously degraded to generate humic acid; meanwhile, metabolites of the bacillus thuringiensis and biological enzymes can promote slow release of nutrient elements such as silicon, potassium and phosphorus in the coal gangue, so that the physical and chemical properties of desert sand grains are improved, and the dual purposes of sand prevention and stabilization and soil improvement are finally achieved by combining the surface laying effect of the coal gangue with the large particle size.

The invention relates to the technical field of ceramsite sand treatment, and discloses a composite modification method for improving the density of gangue ceramsite sand. The method comprises the following steps: crushing and grinding coal gangue, soaking and activating; preparing a composite modifier system; mixing the activated coal gangue and a modifier, and curing; preforming by using a granulator and spraying a binder; carrying out gradient calcination and surface modification; and carrying out gradient cooling strengthening and screening classification to obtain a high-density ceramsite sand finished product. The density of the coal gangue ceramsite sand is improved, the internal structure and surface characteristics of the coal gangue ceramsite sand are improved through a systematic composite modification method, the strength of the coal gangue ceramsite sand is remarkably improved while the light characteristic is kept, the water absorption rate is reduced, and the durability is enhanced.

The invention relates to the technical field of catalyst preparation, and particularly discloses a catalyst for efficient coal-based synthesis of dimethyl carbonate and a preparation method thereof.The catalyst comprises, by weight, 85%-88% of a coal-based activated carbon carrier, 7%-8% of copper oxide, 3%-4% of zinc oxide, 1%-2% of aluminum oxide and 1%-2% of rare earth oxide; the coal-based carbon material is used as the carrier, so that the thermal stability and the surface adsorption capacity of the catalyst are remarkably improved; after CeO2 is introduced, the redox cycle efficiency is improved, and the methanol conversion rate and DMC selectivity are enhanced; a pore structure is improved through a coal tar blending carbonization technology, and reactant molecule diffusion and product desorption are facilitated; the catalyst is stable in structure, long in continuous reaction time and good in renewability and industrial adaptability, organic functional groups in coal can be directionally reserved through multiple treatment means, high-density defect sites can be constructed, and the loading performance of the catalyst is enhanced.

The invention discloses a coal activated carbon rotary kiln inner container and a modular structure and an assembly method thereof, and overcomes the defects that an existing rotary kiln inner container is prone to deformation, waste gas is prone to accumulation, and activation is affected. The modular structure comprises a central pipe, a plurality of stirring blades, at least one connecting hoop, a fastener and at least one exhaust hole, the modular structure of the rotary kiln inner container comprises a stirring assembly and a tightening assembly, and a method for assembling the modular structure comprises the steps that the tightening assembly and the stirring assembly are sequentially connected at intervals in the axial direction of the central pipe; according to the invention, the structure is stable, the service life is long, the exhaust is smooth, the reaction is sufficient, the modular design is realized, the implementation is convenient, the connection is reliable, the connection strength between the end part of the stirring blade and the connecting hoop as well as between the root part of the stirring blade and the central pipe is enhanced by the supporting plate and the connecting strip, and the service life of the stirring blade is prolonged. And the whole liner structure is firmer and more durable.

The invention belongs to the technical field of adsorption, and relates to a hydrogel adsorption material based on microbial activated coal gangue loaded with rare earth elements as well as a preparation method and application of the hydrogel adsorption material. The method comprises the following steps: grinding and calcining a coal gangue raw material to obtain calcined coal gangue; mixing the calcined coal gangue with a mixed microbial agent, adjusting the pH value, standing and culturing to obtain microbial activated coal gangue; immersing the microbial activated coal gangue into a rare earth element salt solution, and magnetically stirring to obtain rare earth element loaded modified coal gangue; dissolving sodium methacrylate sulfonate and 2-acrylamido-2-methylpropanesulfonic acid in deionized water, adding a cross-linking agent, an initiator, a rare earth element salt solution and the modified coal gangue, fully reacting until the system is viscous, and freeze-drying to obtain the microbial activated coal gangue loaded rare earth element hydrogel adsorption material. The problems that the potential activity of the coal gangue is not fully utilized, and a traditional hydrogel adsorption material is poor in selectivity, high in cost and the like are solved.

This invention discloses a rotary kiln liner for coal-based activated carbon, its modular structure, and assembly method. It overcomes the shortcomings of existing rotary kiln liners, such as easy deformation and waste gas accumulation affecting activation. The rotary kiln liner is located within the rotary kiln body and includes: a central tube, multiple stirring blades, at least one connecting hoop, fasteners, and at least one exhaust port. This invention provides a modular structure for the rotary kiln liner, including stirring components and fastener components. The method for assembling the modular structure includes sequentially and spacedly connecting the fastener components and stirring components along the axial direction of the central tube. The assembled liner has at least one fastener component with a clamping clamp. This invention features a stable structure, long service life, smooth exhaust, and sufficient reaction. The modular design facilitates implementation and ensures reliable connection. The support plate and connecting strip strengthen the connection between the stirring blade tip and the connecting hoop, as well as between the stirring blade root and the central tube, making the entire liner structure more robust and durable.

The invention relates to a purification and activation integrated method of coal for industrial silicon smelting, and belongs to the technical field of industrial silicon smelting. Aiming at the problems of product quality reduction and high production energy consumption caused by high impurity content and low reaction activity of coal for industrial silicon smelting, the method comprises the following steps: crushing reducing agent coal for industrial silicon smelting to obtain coal particles; adding the coal particles into an acidic impurity removal agent-active agent mixed solution, carrying out mechanical stirring, activating and impurity removal, and carrying out solid-liquid separation to obtain coarse purified coal particles; adding the coarsely purified coal particles into an oxidant-modifier mixed solution for oxidation modification treatment, and carrying out solid-liquid separation to obtain activated coal particles; and adding the activated coal particles into an alkaline solution for soaking treatment, carrying out solid-liquid separation, and drying the solid to obtain the reducing agent coal particles for smelting the low-impurity and high-activity industrial silicon. Synchronous purification and activation of coal for industrial silicon smelting are integrated, reaction conditions are mild, the process is simple, and production automation, mechanization and large-scale production are easy to achieve.

The application discloses a preparation method of a silicate cement porous vegetation concrete material, and comprises the following steps: calcining coal-based kaolin to obtain activated coal-based kaolin; adding the activated coal-based kaolin and a water reducing agent into mixing water, and performing ultrasonic dispersion to form an activated coal-based kaolin suspension; weighing silicate cement, concrete recycled aggregates and fertilizer, and uniformly mixing to form dry materials; uniformly mixing the activated coal-based kaolin suspension and the dry materials, and loading into a mold for forming; and performing film covering and curing. The application is free from the low-alkalinity porous vegetation concrete system of a sulphoaluminate cement used in the preparation of a porous vegetation concrete in the prior art, and utilizes the activated coal-based kaolin after calcination and ultrasonic treatment as a main alkali-reducing agent to reduce the alkalinity of the silicate cement according to the condition that coal-based kaolin resources are rich, and the activated coal-based kaolin is matched with the fertilizer and the concrete recycled aggregates to provide a new material with rich raw material sources and low cost for ecological protection of a slope and a bank.

The invention relates to the technical field of coal gangue treatment, in particular to a method for preparing 45 mullite by using solid waste coal gangue, which comprises the following steps: crushing and screening the solid waste coal gangue, then carrying out microwave irradiation, after irradiation, feeding into a planetary ball mill for grinding and drying, adding a composite alkali solution, stirring and activating to obtain 45 mullite; the composite alkali solution is an aqueous solution formed by mixing NaOH and Na2CO3; adding an interface modifier and composite nanoparticles into the activated coal gangue powder to obtain modified powder; adding water, mixing, pugging, aging, carrying out static pressure molding, and maintaining the pressure to obtain a green body; and uniformly spraying an aqueous solution prepared from a mineralizing agent on the surface of the green body, pre-drying after spraying, carrying out segmented calcination, and cooling to room temperature to obtain the 45 mullicarb. The coal gangue is cooperatively treated through microwave irradiation, compound alkali activation, interface modification and a compound mineralizer, so that the problems of inertia of silicon-aluminum components and poor interface compatibility of the coal gangue are solved, and solid waste resource utilization is realized.

The invention provides a fluidized bed granulation method of coal-based quantum carbon dot intercalation adsorption type slow-release urea, and relates to the technical field of slow-release fertilizer preparation, and the fluidized bed granulation method comprises the following steps: S1, taking low-rank coal as a raw material, crushing the low-rank coal, mixing the crushed low-rank coal with a deep eutectic solvent DES, and carrying out a stripping reaction under a microwave-assisted condition to prepare coal-based quantum carbon dots CQDs; s2, urea powder is mixed with the coal-based quantum carbon dots CQDs dispersion liquid prepared in the step S1, and a urea-CQDs premix is obtained; according to the method, the coal-based quantum carbon dots are prepared from the low-rank coal, the cost of the low-rank coal raw material is only 1 / 10 of that of traditional activated carbon, the stripping degree of a carbon skeleton can be directionally regulated and controlled through a microwave-assisted deep eutectic solvent stripping method, the specific surface area of CQDs is increased to 1800-2500m / g, the content of surface hydroxyl and amino functional groups reaches 8-18mmol / g, and the adsorption capacity to urea is increased to 150-200mg / g.

The invention relates to microbial agent activated low-grade coal gangue graded and quality-divided artificial soil, preparation and application. The artificial soil comprises a bottom structure supporting layer, and a nutrition activation layer is laid on the structure supporting layer; the structure supporting layer adopts large-size-fraction low-grade coal gangue; the nutrition activation layer adopts a mixture inoculated with a microbial agent, and compost fermentation is performed after inoculation; the mixture is formed by mixing small-particle-grade low-grade coal gangue and local soil in equal proportion; a raised dust covering layer is arranged on the nutrition activation layer and adopts medium-grade low-grade coal gangue; the coal gangue nutrients are activated through the complex microbial inoculants, the coal gangue is divided according to the particle size, different grades of coal gangue and different treatment modes are adopted for different grades, and on the premise that the soil function is not affected, the cost can be reduced, the coal gangue absorption amount can be increased, and conversion from solid waste to artificial soil can be completed.

The invention discloses a fiber-reinforced cement-based foam filling material and a preparation method thereof, and belongs to the technical field of building materials. The filling material is prepared from 50%-70% of cement, 5%-25% of activated coal gangue, 10%-20% of modified aluminum slag foaming agent, 1%-2% of polypropylene fiber, 0.5%-1% of basalt fiber and the balance water. The industrial waste aluminum slag and coal gangue are subjected to resource utilization, and the fiber reinforcement technology is combined, so that the problems that a traditional filling material is high in bleeding rate and poor in crack resistance, and the aluminum slag pollutes the environment are solved. The 28-day compressive strength of the filling material reaches 8-10 MPa, and the bleeding rate is 1t; and after 300 freezing and thawing cycles, the strength retention rate is greater than or equal to 90%, the heat conductivity coefficient is less than or equal to 0.25 W / (m.K), and the filling material is suitable for efficient and safe filling of the mine goaf.

This invention discloses a coal liquefaction residue-based warm-mix self-healing dual-function asphalt modifier and its preparation method, belonging to the field of road engineering materials technology. The modifier consists of the following components by mass percentage: plasma-activated coal liquefaction residue micropowder (40-60%), warm-mix functional agent (10-20%), self-healing microcapsules (15-25%), interface reinforcing agent (5-10%), and coupling agent (2-5%). The plasma-activated coal liquefaction residue micropowder has a particle size of 0.15 mm, a specific surface area of ​​300-400 m² / g, and a surface hydroxyl content of 1.2-2.0 mmol / g. Its porous structure is used to adsorb and slowly release the warm-mix functional agent, and also serves as a carrier for the microcapsules. The warm-mix functional agent is a compound of sodium alkylbenzene sulfonate / polyoxyethylene ether and glyceryl stearate / methyl oleate, which are oriented at 120-130℃ to form a lubricating interface layer, reducing the viscosity of the asphalt mortar by more than 30%. The self-healing microcapsules use polyurethane as the shell material and contain asphalt recycler, sulfur, and plasticizer in the core material. They can rupture and release the core material when microcracks propagate.