1438results about "Cement production" patented technology

The invention provides an iron tailing-based geopolymer electromagnetic wave attenuation performance optimization control method and system, and relates to the technical field of electromagnetic wave attenuation, and the method comprises the steps: 1, setting a synthesis condition parameter set of an iron tailing-based geopolymer in a simulation environment, comprising virtual matching of raw materials, particle size distribution, concentration gradient of an alkali activator and curing temperature-time coupling parameters, and a forming process is deduced through an amorphous phase topological configuration and a pore network evolution rule of aluminosilicate gel in a geopolymer microstructure; and step 2, constructing an interface reaction kinetics process based on the synthesis condition parameter set, and generating an enhanced interface digital mapping system with periodically arranged aluminum oxide and silicon oxide regular tetrahedrons through virtual iteration of mineral admixture ratio and forming process parameter boundary conditions. According to the method, a strengthened interface is constructed through simulation synthesis, a loss layer database is established, and microstructure regulation and control and multi-band electromagnetic wave efficient attenuation are achieved.

The invention discloses a sulfuric acid erosion resistant self-repairing geopolymer system and a self-repairing method thereof, and relates to the technical field of composite materials and artificial intelligence. At least one self-repairing unit optimized for sulfuric acid erosion embedded within the geopolymer matrix; the in-situ multipoint pH sensing network is integrated in the geopolymer matrix and is used for monitoring spatio-temporal evolution data of a pH field in a sulfuric acid erosion process in real time; the edge calculation module is used for identifying a preliminary erosion indication according to the received spatio-temporal evolution data of the pH field; and the central AI decision module is used for evaluating an erosion state and predicting a development trend by utilizing an AI model optimized aiming at sulfuric acid erosion according to the identified preliminary erosion indication and the pH field spatio-temporal evolution data, and generating an optimal repair strategy to control the self-repair unit to perform self-repair. According to the invention, intelligent, active and refined protection and life management of the geopolymer in the sulfuric acid erosion process can be realized.

The present invention belongs to the field of resource utilization of building materials and solid waste, and relates to a red-mud-based cementing material based on efficient drying, component homogenization and activity improvement, and a preparation method therefor. The preparation method comprises: adding a filter aid to red mud to carry out sedimentation, then subjecting same to filter pressing until the water content is 14-16%, then drying the solid material, which has been subjected to filter pressing, until the water content is 4% or below, and finally grinding same to obtain the product. The filter aid comprises the following raw materials: 10-30 parts of polyaluminum chloride, 5-15 parts of polyaluminum sulfate, 1000-1200 parts of blast furnace slag or fly ash, 700-900 parts of steel slag, 400-600 parts of carbide slag or alkaline residues, and 300-400 parts of desulfurized gypsum or phosphogypsum or fluorgypsum. By means of the present invention, the dehydration efficiency of red mud can be improved, the red-mud-based cementing material can also be prepared in one step; the preparation process for the red-mud-based cementing material is simplified; and the prepared red-mud-based cementing material has the advantages of a high mechanical strength, high durability and erosion resistance.

The invention relates to a geopolymer-based non-expansive building fireproof coating, and belongs to the field of building materials. A geopolymer prepared from fly ash, granulated blast furnace slag, coal gangue, oil shale waste residues and sodium silicate water glass is used as a binder, and expanded perlite is used as a heat insulation filler to prepare the inorganic building fireproof coating. Meanwhile, tailings and basalt fibers are added, so that the contractibility and integrity of the geopolymer-based fireproof coating are improved. Compared with an organic fireproof coating, the environment-friendly fireproof coating has high environment friendliness in the production and preparation process and the use and action process in the case of a fire disaster. Compared with a traditional Portland cement-based fireproof coating, the fireproof coating has more excellent performance in the aspects of high temperature resistance, corrosion resistance and the like. According to the invention, the way of resource utilization of solid wastes is widened, and the building fireproof coating with excellent performance is provided.

The invention provides a geopolymer preparation and optimization method and system based on machine learning. The method is applied to the technical field of material science and machine learning. The method comprises the following steps: acquiring geopolymer preparation experimental data and preprocessing the data; performing nonlinear regression modeling on the geopolymer performance based on four machine learning regression algorithms, and constructing a geopolymer performance prediction model; calculating and distributing weights according to the mean square error of each machine learning model on the verification set, and performing weighted fusion to obtain a performance prediction result; receiving target performance parameters input by a user and an initial raw material ratio range, performing performance prediction by using the trained geopolymer performance prediction model, and reversely searching an optimal ratio combination meeting target performance constraints through an optimization algorithm; and preparing a geopolymer according to the optimal ratio combination to prepare the coal gangue-slag-fly ash geopolymer grouting material. According to the method, the prediction precision and the model generalization ability are effectively improved, and intelligent recommendation and accurate performance prediction of the raw material ratio are realized.

The invention relates to the technical field of cement materials, in particular to a red-mud-containing steel slag composite cementing material and a preparation method thereof.The method comprises the steps that red mud, slag, steel slag, desulfurized gypsum and sulphoaluminate cement clinker are subjected to dry mixing to obtain an initial mixture; determining whether the excitation capability of the potential hydration activity reaches the standard or not based on the alkaline matching index, and adjusting the weight part of the sulphoaluminate cement clinker; adding a composite exciting agent to obtain activated slurry; determining whether the dispersion effect of the flocculation structure of the initial mixture is qualified or not based on the dispersion index of the flocculation structure, and adjusting the ball milling rotating speed; adding a polymer emulsion to obtain an initial composite cementing material; determining whether the synergistic enhancement effect of the polymer emulsion and the activated slurry is qualified or not based on the synergistic enhancement index, and adjusting the dripping rate of the polymer emulsion; the steel slag composite cementing material containing the red mud is obtained. The preparation stability of the red mud-containing steel slag composite cementing material is improved.

The invention relates to hybrid fiber reinforced ultrahigh-performance geopolymer concrete as well as a preparation method and application thereof. Slag, metakaolin and silica fume are used as precursor materials of geopolymer concrete, a sodium hydroxide-water glass solution is adopted to compound an alkali activator, and steel fibers, polyvinyl alcohol fibers and modified glass chopped fibers of different sizes are mixed and doped, so that the brittleness of the geopolymer concrete is remarkably improved, and the service life of the geopolymer concrete is prolonged. The early strength and the high temperature resistance are improved. The hybrid fiber reinforced ultrahigh-performance geopolymer concrete has the characteristics of low carbon emission, ultrahigh strength, high temperature resistance, high durability and the like, and can meet the use of the geopolymer concrete in actual engineering. According to the ultrahigh-performance geopolymer concrete, solid waste resources are utilized at the same time, carbon emission in the concrete production process is reduced, and the ultrahigh-performance geopolymer concrete is environmentally friendly, low in carbon, ultrahigh in strength, easy to prepare and capable of being suitable for complex environmental engineering structures such as tunnels, bridges and high-rise buildings.

The invention discloses a layered pore structure geopolymer based on combination of multi-stage low-temperature in-situ polymerization and an ice template method and a preparation method of the layered pore structure geopolymer. The preparation method comprises the following steps: preparing geopolymer slurry; performing one-way freezing on the slurry to form a frozen green body containing a directionally arranged ice crystal template; before the frozen green body is subjected to freeze drying to remove an ice crystal template, specific multi-stage low-temperature in-situ polymerization treatment is carried out, and the treatment comprises at least two different low-temperature heat preservation stages which are sequentially carried out within the temperature range of-10 DEG C to + 5 DEG C, and the temperature of the low-temperature heat preservation stages is gradually increased; and then the treated green body is subjected to freeze drying and maintenance. According to the method, the multi-stage low-temperature in-situ polymerization step aiming at the reaction characteristics of the geopolymer is introduced before the ice crystal template is removed, so that the problems of low mechanical property and unstable pore structure of the geopolymer prepared by a traditional ice template method are solved, and the mechanical strength and structural integrity of the product are remarkably improved; meanwhile, a good layered pore structure and pore channel connectivity are kept.

The invention provides an all-solid waste geopolymer grouting material and a preparation method thereof, and relates to the technical field of solid waste resource utilization and geopolymer grouting material preparation. The all-solid waste geopolymer grouting material comprises the following raw materials in parts by weight: 100-200 parts of an all-solid waste mixture, 40-50 parts of an alkaline activator, 0.1-0.5 part of an early strength agent, 0.5-1 part of a water reducing agent, 3-7 parts of a modifier and 70-90 parts of water, the all-solid waste material comprises slag powder, steel slag powder, phosphogypsum and fly ash; the modifying agent is prepared from aluminum dihydrogen phosphate, vinyl triacetoxysilane and ethylenediamine terminated polyethyleneimine. The all-solid waste geopolymer grouting material provided by the invention has the characteristics of good working performance, high early strength, micro-expansibility and the like.

The invention relates to the technical field of solid waste treatment and recycling, and discloses a waste incineration fly ash geopolymer composite material and a preparation method thereof, and the composite material is prepared from waste incineration fly ash, apatite minerals, zero-valent iron powder, persulfate and an alkali activator. The preparation method comprises the following steps: mixing the waste incineration fly ash, apatite minerals, zero-valent iron powder and persulfate to obtain composite powder; performing frequency conversion mechanochemical synergistic activation on the composite powder, wherein the activation process comprises a low-temperature activation stage and a high-energy pulse activation stage; and finally, mixing the activated powder with an alkali activator, pouring, molding and curing. According to the method, the reduction reaction and the oxidation reaction are driven step by step in the same system by regulating and controlling the mechanical energy input time sequence, the compatibility problem of a reducing agent and an oxidizing agent is solved, different types of persistent organic pollutants are synergistically degraded, meanwhile, heavy metal is stabilized, and the treatment effect is good. And the fly ash is recycled to prepare a geopolymer material with mechanical properties.

A free-flowing solid activator for a geopolymer mortar or concrete comprises or consists of an alkali(ne) metal carbonate surface treated with a sub-stoichiometric amount of alkali(ne) metal hydroxide. In one embodiment a method for producing an activated fly ash comprises: a) spraying an aqueous alkali(ne) metal silicate onto the surface of a solid particulate fly ash; b) drying the spray-treated product of step a); c) optionally grinding the dried product of step b); and optionally, repeating the spray treatment process for the product of step b) or step c) by returning the product of step b) or step c) to step a).

The invention discloses a high belite iron aluminate cement clinker, which is prepared from the following raw materials in parts by weight: 39 to 73 parts of carbide slag, 8 to 37 parts of low-grade bauxite, 10 to 16 parts of ardealite, 1 to 31 parts of fly ash and 3 to 9 parts of steel slag. According to the cement clinker, the resource utilization rate of industrial solid waste in cement preparation can be remarkably increased, and dependence on natural raw materials and high-grade raw materials is reduced; impurities in various solid wastes can be used as in-situ mineralizing agents and activating agents, and on the basis of realizing high-added-value resource utilization of various industrial solid wastes and low-grade bauxite, efficient synthesis of target minerals at a relatively low temperature is promoted; and gradient temperature control calcination and gradient cooling processes are further combined, so that sufficient crystallization and development of a target mineral phase can be effectively promoted, a clinker microstructure is optimized, excellent early strength and continuously increased later strength of the cement are ensured, and the common problems of strength shrinkage and the like of the traditional solid waste-based cement can be effectively avoided.

The invention discloses a composite system geopolymer grouting material and a preparation method thereof. The composite system geopolymer grouting material comprises the following raw materials in percentage by mass: 50-70% of coal gangue, 10-30% of fly ash and 10-30% of cement. Functional additives: 5%-20% of desulfurized gypsum and 5%-15% of bentonite; the composite exciting agent is formed by compounding carbide slag and sodium silicate according to the mass ratio of 1: 1-1: 2. The geopolymer is excellent in mechanical property, meets engineering requirements, is remarkable in environmental protection benefit, conforms to double-carbon target low-carbon process innovation: a calcination-free process: traditional high-temperature calcination is abandoned (the temperature needs to be 550-900 DEG C), carbon emission is reduced by more than 30% (compared with a contrast, the carbon emission of a traditional process is increased by 35%), and the geopolymer conforms to the green positioning of low energy consumption and low three wastes of geopolymers. The cost advantage is prominent, the economic value is remarkable, the raw material cost is reduced, specifically, the coal gangue (low-cost solid waste) is used for replacing 30%-50% of cement, and the comprehensive raw material cost is reduced by 40% (compared with a traditional cement-based grouting material).

The invention discloses an iron tailing-based all-solid-waste clinker-free cementing material and a preparation method thereof, and belongs to the technical field of building materials. The cementing material comprises the following components in parts by weight: 30-50 parts of activated iron tailings, 10-20 parts of steel slag, 20-40 parts of mineral slag, 5-20 parts of phosphogypsum and 5-20 parts of an activating agent; a preparation method of the activated iron tailings comprises the following steps that the iron tailings and the red mud are mixed, then an alkaline solution is added, alkali-heat combined treatment is conducted for 2-6 h at the temperature of 150-230 DEG C after even mixing, and the activated iron tailings are obtained after drying. According to the method, the activity of the iron tailings and the red mud is improved through component complementation in the iron tailing activity excitation process, the dosage of NaOH in the alkali-heat excitation process is reduced, and the cementing material with high hydration activity is prepared through multi-source solid waste synergistic interaction in the clinker-free cementing material preparation process.

The invention discloses a preparation process of a high-toughness anti-cracking alkali-activated geopolymer cementing material, which comprises the following steps: (1) mixing steel slag powder and a phosphoric acid solution, heating, preserving heat, reacting, drying to remove moisture, and grinding to obtain pretreated steel slag powder; and (2) uniformly mixing brucite powder, potassium silicate and water to form slurry, then adding basalt fibers into the heated slurry, standing, separating out the fibers after standing, uniformly mixing the fibers with the pretreated steel slag powder, and drying to obtain pretreated fibers. And (3) placing the pretreated fiber in a closed container containing carbon dioxide and water vapor, and carrying out heat preservation and maintenance to obtain the modified fiber. And (4) weighing the following raw materials according to the following proportion: aluminum-silicon solid waste micro powder, coarse aggregate, fine aggregate, the modified fiber, an alkali activator and a water reducing agent. The preparation method comprises the following steps: uniformly mixing the raw materials, adding water and uniformly stirring. The fiber subjected to surface treatment effectively improves the crack resistance of the geopolymer cementing material.

The invention belongs to the technical field of masonry cement, and particularly discloses all-solid-waste low-carbon-emission masonry cement and a preparation method thereof. Comprising the following steps: 1, finely grinding iron tailings, carbide slag, fly ash and silica fume, and proportioning according to a design to obtain a cement raw material; 2, agglomerating or pelletizing the cement raw material, and calcining according to a designed temperature to obtain a cement clinker; and 3, mixing the cement clinker with a certain proportion of gypsum, and grinding to the target fineness to obtain the masonry cement. The masonry cement is prepared from all solid wastes, meanwhile, a calcium source is mainly provided by the carbide slag with low carbon emission, compared with cement fired by calcium carbonate calcium sources, the carbon emission is greatly reduced, the goal of high-valued and green utilization of various solid wastes including iron tailings is achieved, and the method is suitable for industrial production. The compressive strength, the sulfur trioxide content and the screen residue of the prepared masonry cement meet the national standard requirements of masonry cement. In addition, the masonry cement is prepared from all solid waste raw materials, so that the preparation cost of the masonry cement is reduced.

The invention belongs to the technical field of civil engineering, and discloses a rigid-flexible combined pile for a thick collapsible loess stratum, which comprises a flexible short pile, a semi-rigid medium-long pile, a rigid long pile, an alkali-activated geopolymer solidified loess cushion layer and a fiber grid, the semi-rigid medium-long piles are used for reinforcing a medium-thickness loess foundation, and the rigid long piles are used for reinforcing a deep-thickness loess foundation; the flexible short piles and the semi-rigid medium-long piles are arranged in a rectangular array mode, each semi-rigid medium-long pile is located at the centroid of the four adjacent flexible short piles, the rigid long piles are arranged in a plum blossom-shaped array mode, each rigid long pile is located at the centroid of the four adjacent semi-rigid medium-long piles, and the alkali-activated geopolymer solidified loess cushion layer and the fiber grating are arranged on the pile top. Compared with a traditional method, the rigid-flexible combined pile and the construction method thereof have the advantages that cost is saved, and the problem of reinforcement of deep and thick collapsible loess composite foundations under the condition of small loads of high-speed railways, highways, buildings, municipal roads and the like is solved.

The invention provides solid waste-based delayed coagulation micro-expansive cement and a preparation method thereof, and belongs to the technical field of building materials. The solid waste-based delayed coagulation micro-expansive cement is prepared from the following raw materials in percentage by mass: 40%-50% of Portland cement clinker, 0.04%-0.06% of a delayed coagulation type grinding aid, 8%-12% of high-calcium steel slag, 10%-16% of slag, 8%-16% of fly ash, 8%-12% of modified phosphogypsum and 8%-12% of calcium-containing powder, wherein a preparation method of the modified phosphogypsum comprises the following steps: uniformly mixing phosphogypsum with phosphorus tailings subjected to high-temperature calcination, and storing for 10-30 days to obtain a mixture; and mixing the mixture with high-calcium steel slag, grinding, and drying to obtain the modified phosphogypsum. The solid waste-based delayed coagulation micro-expansive cement has the advantages of stable delayed coagulation effect, shrinkage compensation effect, continuous increase of later strength and the like; wherein the initial setting time of the solid waste-based delayed coagulation micro-expansive cement is 350 to 380 minutes, and the final setting time of the solid waste-based delayed coagulation micro-expansive cement is 420 to 460 minutes; 28-day compressive strength is greater than or equal to 45 MPa; the 28-day dry shrinkage rate is less than or equal to 0.09%; and the 28-day linear expansion rate is less than or equal to 0.5%.

The invention provides a multi-solid-waste cementing material as well as a preparation method and an application method thereof. The multi-solid-waste cementing material comprises a multi-solid-waste cementing material and engineering residue soil, wherein the multi-solid-waste cementing material comprises 25%-35% (by mass) of superfine slag powder, 25%-35% (by mass) of fly ash, 7%-15% (by mass) of coal gangue, 8%-15% (by mass) of carbide slag, 5%-12% (by mass) of superfine steel slag powder and 8%-14% (by mass) of an alkali activator; the mass ratio of the multi-solid waste cementing material to the engineering residue soil is 1: (6-8). The cementing material is prepared from a plurality of industrial solid wastes, and has the characteristics of high backfill strength, good fluidity, difficulty in shrinkage, low carbon and environmental protection.

The invention discloses a grading grinding vertical mill and a using method thereof, and relates to the technical field of vertical mills.The grading grinding vertical mill comprises a mill shell, a millstone grading rotor and an eddy current restraining flow guide cover assembly, the grading rotor is fixedly installed on the upper portion of the inner wall of the mill shell, and a millstone is fixed below the grading rotor; and a vortex suppression flow guide cover assembly is fixedly mounted on the inner wall of the mill shell and located on the periphery of the grading rotor, and the vortex suppression flow guide cover assembly is used for guiding airflow to uniformly and stably flow to a blade area of the grading rotor. According to the invention, the eddy current suppression flow guide cover assembly is mounted, so that active suppression of three-dimensional turbulence in a classification area is realized, the problems of over-grinding of fine powder and running of coarse particles caused by airflow turbulence induced by a high-speed rotor are solved, the classification precision is improved, and the classification power consumption is reduced.

The invention belongs to the technical field of low-carbon building materials, and particularly relates to a fly ash-slag-based alkali-activated cementing material as well as a preparation method, a strength regulation and control method and application thereof. The cementing material comprises, by mass, 64%-68% of powder, 21%-30% of a composite alkali activator and 5%-12% of additional water, and in the powder, slag powder accounts for 0-50% of the mass of the powder, and fly ash accounts for 50-100% of the mass of the powder. The initial setting time of the cementing material is larger than or equal to 60 minutes, the 28-day compressive strength is 30.0-100.0 MPa, the breaking strength is 4.0-7.0 MPa, the cementing material has good mechanical performance, meanwhile, the strength of the cementing material can be regulated and controlled through the powder mixing ratio, the regulation and control range is large, the cementing material is suitable for application scenes with different strength requirements, and the cementing material has wide application prospects in the field of civil engineering.

The invention relates to the technical field of building materials, in particular to a cementing material for a fabricated wall prepared from multi-element solid waste and a preparation method of the cementing material. The preparation method comprises the following steps: 25-55 parts of fly ash, 25-65 parts of blast furnace slag, 8-10 parts of lime, 1-5 parts of desulfurized gypsum, 3-6 parts of a first mixture, 2-5 parts of a second mixture and 5-8 parts of an alkali activator; the mass ratio of the metakaolin to the bentonite to the superfine calcium carbonate in the first mixture is 3: 2: 1; the mass ratio of the vermiculite to the expanded perlite to the glass beads in the second mixture is 2: 2: 1. Through the synergistic excitation effect of Ca < 2 + > and Na < + > and the addition of the first mixture and the second mixture, the cementing material forms a more stable microstructure. A hydration product SEM figure shows that C-S-H and C (N)-A-S-H gel are symbiotic to form a three-dimensional network, pores are filled with needle-like ettringite crystals, and in combination with the brucite phase anchoring effect, the mechanical properties, such as strength and durability, of the material are remarkably improved.

The invention relates to a modified silicon carbide fiber and a preparation method and application thereof, the modified silicon carbide fiber endows magnetic loss, and combines high strength and corrosion resistance of a geopolymer matrix to realize double improvement of mechanical properties and wave absorbing efficiency of concrete. Carbon fibers in conventional wave-absorbing concrete are replaced by modified silicon carbide fibers, so that on one hand, the wave-absorbing concrete has good oxidation resistance at high temperature, carbon emission is greatly reduced, and the wave-absorbing concrete has the advantages of energy conservation and environmental protection; and on the other hand, the defect that the performance is reduced at high temperature is overcome, and the modified silicon carbide fiber enables the magnetic loss of metal and the dielectric loss of a matrix to form a synergistic effect, so that the wave absorbing performance is greatly improved. The invention is suitable for green communication infrastructures, and has the characteristics of environmental protection, high durability and broadband wave absorption.

The invention discloses sulfate-erosion-resistant metakaolin-slag-based geopolymer concrete, belongs to the technical field of concrete, and aims to solve the problems that the corrosion resistance of traditional silicate concrete is ineffective and the adaptability of conventional alkali-activated concrete is insufficient in a special environment. The concrete comprises the following components in parts by weight: 60-90 parts of a cementing material, 120-170 parts of aggregate, 15-30 parts of a composite activator, 2-8 parts of a function regulator and the like, the cementing material is prepared from nano TiO2 / KH-550 composite modified metakaolin, slag and silica fume-coal gangue powder-HAP composite powder; the aggregate comprises modified limestone macadam (soaked and dried by a sodium dihydrogen phosphate solution) and river sand; the composite exciting agent comprises water glass, sodium hydroxide, sodium pyrophosphate, propylene glycol and the like; the function regulator comprises superfine fly ash, a naphthalene water reducer, HPMC (Hydroxy Propyl Methyl Cellulose) and boric acid. Through the synergistic effect of the components, the sulfate corrosion resistance, the mechanical property and the environmental adaptation performance of the concrete are improved, and the concrete is suitable for engineering construction under the service environment of high-concentration sulfate and the like.

This invention relates to the field of novel low-carbon composite cement and solid waste resource utilization technology, specifically to a red mud-based low-carbon composite cement and its preparation method. The raw materials for this red mud-based low-carbon composite cement include red mud, auxiliary cementitious materials, gypsum-based solid waste, alkali activator, retarder, and interface reinforcing agent. It possesses compressive strength comparable to or even higher than 425 or 525 cement, with a red mud content ≥30wt% and an alkali activator content as low as 3wt%–8wt%. This not only achieves large-scale resource utilization of red mud but also significantly reduces production costs. Simultaneously, the cement hydration products have a good shielding effect against radioactivity, ensuring that the radioactivity of the hardened cement still meets national standards even with the large-scale incorporation of red mud. Moreover, the preparation method of this cement is simple, requiring neither red mud dealkalization nor high-temperature calcination, truly achieving low-carbon, low-energy-consumption, and low-cost green and environmentally friendly cement production.

The invention relates to the technical field of geopolymer concrete preparation, in particular to a geopolymer concrete material as well as a preparation method and application thereof. The geopolymer concrete material comprises modified metakaolin, slag, modified glass beads, an exciting agent solution and a mixed modifier. The preparation method of the modified glass beads comprises the following steps: soaking glass beads in a composite acid solution, washing the glass beads with water until the glass beads are neutral, drying the glass beads, and soaking the glass beads in an ethanol solution of 3-aminopropyltriethoxysilane with the concentration of 5wt% to obtain pretreated glass beads; dispersing the pretreated microbeads in a 1 wt% dopamine hydrochloride solution, carrying out an oscillating reaction for 1.5-2 h, carrying out centrifugation, then carrying out cleaning with ethanol, and carrying out vacuum drying so as to obtain dried microbeads; molybdenum disulfide and the dried microbeads are mixed and then added into absolute ethyl alcohol, precipitate is collected after ultrasonic dispersion, the precipitate is dried, and the modified glass microbeads are obtained.

The invention relates to a multi-component composite modified geopolymer material and a preparation method thereof, and aims to solve the problems of high brittleness, easiness in cracking and poor durability of a traditional geopolymer. According to the material, industrial solid wastes (carbonized steel slag, volcanic ash and the like) are used as main matrixes, a macroscopic anti-cracking framework is constructed through red copper fibers, micropores are nanofilled with CVD silicon oxide substrate graphene, and polyamide resin flexibly buffers stress, so that a cross-scale reinforcing system is formed. The preparation method adopts a solid phase premixing-liquid phase excitation-gradient compounding process, and functional components are doped in sections, so that the dispersity and constructability are guaranteed. The technical effects are obvious: the breaking strength is reached, the splitting tensile strength is obviously improved, the mass loss rate is obviously reduced after freezing and thawing for 100 times, and the shrinkage crack self-limit is within 50 [mu] m. The carbon emission of the material is greatly reduced, the high-durability standard is met, and the material is suitable for severe environmental engineering.

The utility model discloses a quantitative blanking vertical mill with an anti-clogging function, which relates to the technical field of vertical mills and comprises a support, a tank is arranged at the top of the support, a first motor is mounted at the bottom of the tank, an output end of the first motor is connected with a millstone, a grinding roller is arranged in the tank, and the millstone is connected with an output end of the first motor. Through the arrangement of a second motor, a supporting frame, a feeding port, a smashing roller, a discharging port, a piston pump, a feeding pipe and a discharging pipe, materials enter the supporting frame through the feeding port, the second motor is started, and after the second motor is started, the second motor drives the smashing roller to rotate, so that the materials can be smashed, and blockage of the materials is prevented; the second motor can drive the connecting rod to rotate synchronously when rotating, the pushing rod arranged outside the connecting rod in a sleeving mode can push the piston rod to move in a reciprocating mode, the materials enter the tank body through the discharging pipe, and therefore the purpose of quantitative discharging is achieved.

The invention discloses green low-carbon cement which comprises the following components in parts by weight: 95-100 parts of cement raw material, 2-4 parts of desulfurized gypsum and 2-8 parts of composite modifier, wherein the cement raw material comprises limestone, clay, carbide slag, iron ore powder and coal gangue; the composite modifier comprises fullerene and a carbon nano tube. According to the invention, the composite modifier based on fullerene and carbon nanotubes is introduced into the calcining stage of the cement raw material, so that the calcining temperature can be effectively reduced and the calcining efficiency can be improved while the early and later strength of the cement is ensured; and various industrial wastes such as industrial solid waste coal gangue and carbide slag can be fully utilized, so that the method has remarkable economic and environmental benefits.

The present disclosure, in various embodiments, discloses hydrothermal methods, hydrothermally modified materials and dried hydrothermally modified materials. Certain dried hydrothermally modified materials can readily releases ionic species such as alkali metal ions (K+, Na+), silicate salts, and alkaline earth metal ions (Mg2+, Ca2+). Some dried hydrothermally modified materials can readily release aluminum ions and / or silicon, such as in the form of soluble silicates. Such processes and materials are useful, for example in economically preparing potassium releasing fertilizers.