16 results about "Green materials" patented technology

The invention relates to a static sintering method and system for preparing aluminum hydroxide by extracting an aluminum element from fly ash, and the static sintering method comprises the following steps: firstly, taking a raw material which is crushed to a process control fineness as a pre-powder material, carrying out raw material preparation and blank forming on the pre-powder material to obtain a blank, sintering the blank to obtain a clinker, and sintering the clinker to obtain the aluminum hydroxide. The clinker is dissolved out to obtain slurry, and then the slurry is subjected to slurry desilicication, carbon component reaction, hydrogen-aluminum separation and drying to prepare high-whiteness and high-purity aluminum hydroxide; wherein the raw materials comprise fly ash; the blanks are sintered into polygon prism-shaped blanks, the polygon prism-shaped blanks are stacked on a high-temperature-resistant kiln car in an industrial tunnel kiln, the blanks are roasted in the industrial tunnel kiln, and the roasting temperature ranges from 800 DEG C to 1100 DEG C. According to the invention, solid wastes such as fly ash, coal gangue, carbide slag and the like, pulverized coal and sodium carbonate are crushed into materials with the same fineness, high-whiteness and high-purity aluminum hydroxide can be obtained through an alkaline static sintering process, the recovery rate of aluminum in the solid wastes is about 90%, and harmless, resource and synergistic utilization of the solid wastes such as fly ash and the like is realized.

The utility model discloses a kind of green material automatic powder burying devices for special ceramic production, belong to the field of ceramic production.A kind of green material automatic powder burying devices for special ceramic production, including front and rear through work tank, transmission assembly is provided in work tank along passageway length direction, and the side wall of work tank is provided with spray head, crushing cylinder, and the cavity of work tank is communicated by guide channel, and at least one group of crushing rollers is provided in crushing cylinder, the axis of each group of crushing roller is triangularly arranged, and collision gap is formed between crushing roller and crushing cylinder;Storage box is fixedly connected with crushing cylinder by conveying component, and the cavity of storage box is communicated with spray head by conveying mechanism;The utility model effectively crushes the hard agglomerate powder formed under the vibration effect of conveying belt, avoids excessive powder jam, and improves the quality of recycled powder.

This invention relates to the field of green materials engineering technology, and discloses a low-VOC environmentally friendly pressure-sensitive adhesive for vehicle body stickers and its preparation method. The adhesive comprises deionized water, enzymatically hydrolyzed sodium lignin sulfonate powder, hydrogenated rosin glycerol ester, oxidized starch aqueous solution, ammonia, glucono-δ-lactone powder, and zirconium carbonate ammonium solution. During preparation, a microemulsion is formed by dispersing hydrogenated rosin glycerol ester using the amphiphilic properties of lignin under a shear field. After mixing with oxidized starch, latent acid, ammonia, and a crosslinking agent are added under laminar flow conditions. This invention utilizes the physicochemical coupling mechanism of ammonia volatilization and the thermal release of acid from glucono-δ-lactone to achieve synchronous homogeneous crosslinking at a thick coating depth, solving the problem of cohesive gradient defects. Simultaneously, it utilizes high-valence zirconium ions to construct a dynamic reversible coordination dissipation network, effectively dissipating peel tensile stress, avoiding cohesive-destructive residues, and eliminating the risk of VOCs and interfacial pinholes caused by small-molecule emulsifier residues, significantly improving heat resistance and tack performance.

This invention relates to the field of backfill technology, specifically to a green material for backfilling cofferdam boreholes and its preparation method. The green material for backfilling cofferdam boreholes comprises the following components by weight: 21-33 parts cement, 3.5-4.5 parts bentonite, 60-70 parts clay, 3-5 parts modified sawdust, 60-66 parts deionized water, and 2-6 parts modified fiber. The green material for backfilling cofferdam boreholes prepared by this invention has good hydration ability and strong compressive strength. Furthermore, through the combination of modified sawdust and modified fiber, a mechanical interlocking effect is formed between them, effectively improving the cohesiveness of the prepared backfill material.

The invention belongs to the technical field of solid waste treatment, and discloses a method for preparing foam microcrystalline glass by utilizing waste heat of hot blast furnace slag and co-treating chromium-containing sludge and a product, the method comprises the following steps: preparing raw materials according to mass percentage, and then grinding and mixing uniformly; performing compression molding on the mixed wet material to obtain a raw material; drying to obtain a green body; the preparation method comprises the following steps: preheating a high-temperature furnace to a target temperature of 1050-1200 DEG C, quickly putting a green body into the high-temperature furnace, sintering by utilizing waste heat of hot blast furnace slag, and reacting SiC with oxygen in air at high temperature to generate SiO2 and CO2 to form foam microcrystalline glass. According to the invention, through the combination of the process and the formula, the foam microcrystalline glass is prepared by fully utilizing the high-temperature waste heat of the hot blast furnace slag and the chromium-containing sludge, and the chromium-containing sludge is harmlessly treated by utilizing the waste heat, so that the prepared foam microcrystalline glass has relatively high performance, the additional value can be further improved, and the economic benefit is improved.

This invention provides a method for preparing high-modulus modified thin bamboo veneer and laminates. The method improves the material's modulus, toughness, and bonding properties while retaining the bamboo veneer. A green and environmentally friendly eutectic solvent, a compound solution of choline chloride, glycerol, and aluminum chloride hexahydrate, is used to impregnate the ultrasonically treated bamboo veneer sheets. Under specific temperature and time conditions, some lignin in the main components is removed, and the waxy layer and SiO2 on the bamboo veneer surface react chemically with the solvent components to form new silicides, significantly increasing the modulus. The waxy layer, which affects bonding, dissolves or is removed, resulting in a viscous lamination on the surface. The porosity of the main cells in the inner layer increases, facilitating subsequent bonding or other impregnation treatments, thus enabling controllable board structure and properties. The high-strength and tough modified bamboo veneer unit prepared by this invention does not require de-greening treatment, improving bamboo utilization.

The application provides a method for preparing building ceramics by using full barren material and the building ceramics, and the method comprises the following steps: mixing green mineral raw materials according to a predetermined green body formula to obtain mixed raw materials, wherein the green mineral raw materials are full barren materials; after wet ball milling, the mixed raw materials are treated to obtain a green material mud group; after adding aluminum dihydrogen phosphate solution into the green material mud group, the green material mud group is extruded to obtain a mud material, and the mud material is sent into a roller press to prepare a ceramic green body; and the ceramic green body is treated to obtain the building ceramics. By using the full barren material as the ceramic raw material, the clay is not needed, the strength of the ceramic green body is improved by adding the aluminum dihydrogen phosphate solution, the extrusion molding and the roller press treatment are used to obtain the molded ceramic green body, and the problems that the strength of the ceramic green body is reduced and the ceramic green body is difficult to be molded due to the reduction of the amount of clay are solved.

The invention discloses a method for preparing a graphene material by taking CO2 as a carbon source, which comprises the following steps: 1) separating, purifying and carbonizing a cultivated diatom colony to obtain a carbon-based precursor; loading the carbon-based precursor in a transition metal matrix to obtain a transition metal loaded carbon-based precursor; and (2) by taking the transition metal loaded carbon-based precursor as a cathode and cooperating with a conductive anode, inserting the cathode and the anode into a CO2 adsorbent, carrying out electrochemical reaction under the actions of CO2 atmosphere, high temperature and electric field to obtain a graphene crude product, and washing, carrying out suction filtration and drying to obtain the graphene material. According to the method, eutrophicated algae and captured CO2 are taken as raw materials, and an electrochemical process based on high temperature and electric field conditions is combined, so that the synergistic advantages of biological carbon sequestration and electrochemical conversion are fully exerted, the utilization efficiency of CO2 is remarkably improved, and formation of a graphene product with rich morphology and relatively large specific surface area is promoted; the related raw materials are low in cost, the process is simple, and a green material synthesis path with low energy consumption and high atom economy is constructed.

The invention discloses a magnesite enhanced ceramsite proppant preparation method and equipment, and relates to the technical field of ceramsite proppants, the magnesite enhanced ceramsite proppant preparation equipment comprises a support, a first granulation disc and a second granulation disc are obliquely and rotatably connected to the support, and the second granulation disc is located under the first granulation disc; a vortex-shaped sieve tray synchronously rotating with the first granulation tray is arranged between the first granulation tray and the second granulation tray, a plurality of sieve holes are uniformly formed in the vortex-shaped sieve tray, a discharge port is formed in the inner side of the vortex-shaped sieve tray, and a material collecting tray is arranged at the position, corresponding to the discharge port, between the vortex-shaped sieve tray and the second granulation tray; a mother nucleus forming device fixedly connected with the support is arranged above the first granulation disc and comprises a charging barrel, and the inner side of the charging barrel is rotationally connected with a rotating shaft. According to the preparation method and equipment of the magnesite enhanced ceramsite proppant, relatively high strength can be obtained while low apparent density can be maintained, and meanwhile, the blank forming efficiency can be improved.

This invention discloses a green renovation construction method for ancient buildings based on the concept of coexistence of old and new, including the following steps: construction and evaluation of a digital twin model of the building's full information; selective structural repair and reinforcement based on the principles of reversibility and minimal intervention; modular implantation and integration of adaptive functional systems; selection of regional ecological building materials and integration of old and new materials; deployment and operation and maintenance of an intelligent health monitoring and early warning system for the entire building life cycle. This invention, by disclosing a highly detailed and systematic construction method for the renovation of ancient buildings, innovatively proposes a complete set of technical processes and management logic that runs through the entire process of "evaluation-repair-renovation-operation and maintenance," and fully describes a comprehensive construction method centered on "repair, restoration, and reinforcement," integrating modern digital technology, green material technology, and intelligent monitoring technology, which has high promotional value.

The invention relates to the technical field of tunnel geotechnical engineering model similar materials, in particular to a similar material for simulating tunnel surrounding rock in a fault fracture zone and a preparation method. The similar materials comprise river sand, fly ash, bryozoatum and wood chips; the preparation method specifically comprises the following steps: determining the physical and mechanical parameter range of the similar material according to the actual physical and mechanical parameters, the similarity ratio and the like of the tunnel surrounding rock in the fault fracture zone; determining the weight ratio of the corresponding raw materials according to the physical and mechanical parameter range of the prototype material; uniformly stirring the selected river sand, fly ash, bryozoatum and sawdust to form a mixed material in a dry state; and adding water into the mixed material, stirring in a stirrer for 2 minutes, pouring the stirred similar material into a tray container, and storing in a humid and shady area. The preparation method of the similar material is simple, and the mechanical property adaptability is wide. Similar materials are green materials which are non-toxic and free of pungent smell. As a surrounding rock similar material similar to a soil body, soil can be filled and compacted again after fault model tests of each group of working conditions are carried out, and the similar material can be repeatedly used.

The utility model provides a kind of building green material carbon-planting board, it is related to carbon-planting board technical field, the utility model includes carbon-planting board body, the body of carbon-planting board side is provided with protective device, the protective device is shielded and protected to the side of carbon-planting board body by setting detachable metal material's protective plate, the utility model is shielded completely to the side of carbon-planting board body by setting protective plate, then when fire occurs, flame cannot directly burn to the shielded carbon-planting board body, effectively prevent carbon-planting board from burning, while protective plate can also be protected to extrusion of external force, and replace carbon-planting board body and bear most extrusion of external force, so that deformation occurs on protective plate, and the ductility and plasticity of metal material are better, and protective plate is detachable, and then it is convenient to overhaul and replace protective plate, ensure the stability of carbon-planting board body overall structure.

The invention belongs to the technical field of environmental groundwater remediation, and discloses an oxygen-releasing agent sustained-release material as well as a preparation method and application thereof. Comprising sustained-release particles and a coating layer wrapping the surfaces of the sustained-release particles. The slow-release particles comprise an oxygen release agent and an embedding agent, the embedding agent comprises clay minerals, silicon-aluminum industrial waste residues and a binder, and the coating layer is a water-soluble polymer material layer. The preparation method comprises the following steps: uniformly mixing the oxygen release agent, the clay mineral and the salic industrial waste residue in proportion, adding a binder aqueous solution, and stirring to obtain a wet blank; granulating the wet blank into granules, and drying and shaping to obtain sustained-release granules; the preparation method comprises the following steps: preparing a coating solution, putting the sustained-release particles into a coating machine, spraying the coating solution on the surfaces of the sustained-release particles by using a spray gun under the condition of continuous rotation, and drying and curing to obtain the oxygen-releasing agent sustained-release material. The slow-release material is reasonable in formula, wide in raw material source, low in cost, simple and feasible in preparation method and convenient to operate, and can be applied to remediation of polluted groundwater.

The application discloses a kind of full biodegradable starch foaming formula and preparation method, it is related to foaming material technical field, by composite modification starch, enzymatic fiber, nano reinforcing agent and composite foaming agent synergistic design, in combination with microwave auxiliary gradient hot-pressing forming process, realize the complete biodegradability of material in normal temperature natural environment and function integration.Product has high mechanical strength, antibacterial, high transparency and low water absorption cushioning performance, compared with traditional PLA material cost is greatly reduced, and no industrial compost facilities, from raw material to process whole process breaks through "performance-degradation-cost" restriction, realizes green material industrialization replacement.

This invention belongs to the field of polyurethane hot melt adhesive technology, and provides a heat-resistant biomass-based polyurethane hot melt adhesive and its preparation method. The biomass-based polyurethane hot melt adhesive comprises the following raw materials in parts by weight: 35-45 parts modified castor oil polyol, 22-28 parts L-lysine ethyl ester diisocyanate, 15-20 parts isophorone diisocyanate, 4-6 parts chain extender, 0.15-0.3 parts catalyst, 6-10 parts tackifying resin, 0.4-0.7 parts antioxidant, 4-8 parts modified halloysite nanotubes, and 1-2 parts molecular sieve. Furthermore, the preparation method of this biomass-based polyurethane hot melt adhesive is simple, easy to operate, and readily scalable. While maintaining the excellent performance characteristics of traditional petroleum-based polyurethane hot melt adhesives, it effectively improves the environmental friendliness and renewability of the material, better meeting the development needs of green materials.

A method for welding together at least two parts of green material, referred to as green parts, by means of co-sintering, comprising the following steps: - assembling the at least two green parts at a junction zone of said parts so as to form a green one-piece assembly, - de-binding the green one-piece assembly, and - sintering the one-piece assembly so as to obtain a dense one-piece assembly forming a final part, characterised in that the two green parts (10, 12) each have a composition of different powder, so as to produce a final part (1) having at least two parts with different grain sizes.