86results about How to "Reduce mining" patented technology

The invention relates to the technical field of concrete wall materials, and discloses a recycled concrete wall material and a preparation method thereof, the recycled concrete wall material comprises the following components by weight: 300-500 parts of recycled coarse aggregate, 200-400 parts of recycled fine aggregate, 150-300 parts of cement, 30-80 parts of fly ash, 3-8 parts of a water reducer, 5-15 parts of reinforced fiber, and 20-30 parts of a modified composition. Comprising the following steps: S1, raw material pretreatment, S2, mixing and stirring, S3, molding and curing, and S4, quality detection. The building waste is efficiently utilized, exploitation of natural aggregate is reduced, energy consumption and carbon emission in the production process are reduced, the landfill amount of the building waste and land occupation are reduced, the material strength and durability are good, the waterproof performance is improved, and the crack resistance and seismic resistance of the wall are enhanced.

The invention relates to the field of recycled concrete, and discloses a high-strength recycled concrete formula and a preparation method thereof, the high-strength recycled concrete formula comprises the following raw materials by weight: 180-240 parts of cement, 600-800 parts of hydrophobic modified recycled coarse aggregate, 180-280 parts of recycled fine aggregate, 400-600 parts of sand, 300-500 parts of fly ash, 60-120 parts of silica fume, and 20-30 parts of a water reducer, the modified waste rubber powder is prepared from, by weight, 25-35 parts of modified waste rubber powder, 10-40 parts of polyethylene wax, 2-4 parts of m-phenylenediamine and 12-16 parts of tetramethyl orthosilicate. In the invention, by using a large amount of recycled aggregate (coarse aggregate and fine aggregate), the exploitation of new natural resources is effectively reduced, the reutilization rate of building wastes is improved, and by optimizing the proportion and adding a plurality of modifiers (such as silica fume, fly ash, modified waste rubber powder and the like), the mechanical properties such as compression resistance, fracture resistance and the like of the concrete are remarkably improved; by adding the hydrophobic modified recycled coarse aggregate and the penetrant, the impermeability and durability of the concrete are enhanced, so that the performance and the application range of the recycled concrete are improved.

The invention relates to the field of sprayed concrete, in particular to green low-carbon high-performance sprayed concrete using active regenerated micro powder and a preparation method and a construction process of the green low-carbon high-performance sprayed concrete. The sprayed concrete is prepared from the following components in parts by weight: 300 to 350 parts of cement, 50 to 80 parts of active regenerated micro powder, 60 to 120 parts of early strength type mineral admixture, 20 to 40 parts of rubber powder, 10 to 20 parts of hydrophobic compacting agent, 700 to 800 parts of coarse aggregate and 800 to 900 parts of fine aggregate, the mixing amount of the water reducing agent is 0.8%-1.2% of the mass of the cementing material, and the mixing amount of the fluoride-free alkali-free accelerator is 6%-9% of the mass of the cementing material; wherein the active regenerated micro powder is composed of multi-component isomeric alcohol amine and regenerated micro powder, and the dosage of the multi-component isomeric alcohol amine is 0.1%-0.5% of the mass of the cementing material. The cement consumption of the sprayed concrete can be reduced, and the requirement for high performance of the sprayed concrete is met.

The invention relates to a synchronous grouting material based on muddy silt shield muck and a preparation method thereof, and the synchronous grouting material comprises the following raw materials in parts by weight: 13 to 16 parts of cement, 16 to 20 parts of slag, 142 to 147 parts of fine sand containing silt powder, 0.03 to 0.1 part of trimethylsilyl ethyl acetate, 0.07 to 0.17 part of disodium hydroxyethylphosphonate, 0.03 to 0.1 part of pentasodium amino trimethylene phosphonate and 63 to 67 parts of water. According to the invention, the fine sand containing mud powder is used as a main raw material to replace bentonite and fine sand in synchronous grouting in the prior art, and is combined with a specific cement additive, so that the compressive strength and the impermeability of the synchronous grouting material are effectively improved through the synergistic effect of the components, local materials can be used, and the outward transportation and disposal cost of a large amount of muck can be greatly reduced.

The invention discloses a novel solid-waste-based cementing material and a preparation method thereof, and relates to the field of industrial solid waste recycling and building material preparation. The novel solid waste-based cementing material mainly comprises the following raw materials: fly ash, blast furnace slag, carbide slag, mirabilite and calcium sulfate. The novel solid-waste-based cementing material is prepared from the raw materials through the processes of grinding, screening, uniform mixing, forming and curing. The geopolymer material is prepared by taking the solid waste fly ash and the blast furnace slag as raw materials and taking the carbide slag, the mirabilite and the calcium sulfate as excitants, the preparation process is simple, the prepared geopolymer building block is good in performance, a large amount of industrial solid waste can be consumed, environmental pollution caused by solid waste stacking can be relieved, and the environment friendliness is achieved. And mining of natural ore resources such as silicon and aluminum can be reduced, low-cost green production is achieved, and the method has wide market application prospects.

The invention discloses lightweight aggregate based on ardealite and multi-source solid waste as well as a preparation method and a utilization method of the lightweight aggregate, and aims to solve the problems of low utilization rate of the ardealite and the multi-source solid waste, high energy consumption and high carbon emission of a utilization scheme, insufficient long-term water stability of a recycled product and the like in the prior art. The phosphogypsum and the multi-source solid waste are gelatinized by using the alkali activator, so that the solid waste generates viscosity to form a polymerized gel material, and the gelatinization process is realized by using the activity of the industrial solid waste, so that the lightweight aggregate with high strength and good performance is obtained. And meanwhile, the lightweight aggregate is classified in a cascade manner according to different strength grades of the lightweight aggregate, so that the practicability of the recycled product is improved.

The invention relates to a preparation method of a modified waste concrete recycled aggregate, which comprises the following steps: crushing waste concrete, screening the crushed waste concrete with a proper particle size to serve as a raw material of the recycled aggregate, washing with a shaking sieve to remove part of edges and corners about to fall off, and carrying out gelation reaction by using modified solutions such as nano silicon dioxide and water-soluble silicate to obtain the modified waste concrete recycled aggregate. According to the invention, fine pores on the surfaces of concrete particles are blocked and repaired, so that the structure is complete and compact, the mechanical strength of the aggregate is enhanced, the porosity and the water absorption rate are reduced, and the water absorption and the mechanical strength are further reduced through phenolic resin coating. The modified waste concrete recycled aggregate is mixed with cement, zeolite powder and the like, the mixture is pressed into a blank, and the artificial stone with excellent mechanical properties and low water absorption is obtained after carbonization curing. The method provided by the invention has good application prospects and environmental protection significance.

The invention relates to a manufacturing method of a roadbed material based on high-water-content tailing soil, and belongs to the field of road engineering and environmental geotechnical engineering. The roadbed material comprises high-water-content tailing soil, lime, cement and water; the preparation method comprises the following steps: crushing the high-water-content tailing soil, and measuring the initial water content of the high-water-content tailing soil; the method comprises the following steps: fully mixing high-water-content tailing soil with lime in different mass ratios, carrying out a lime precipitation test, crushing the tailing soil subjected to lime reaction, fully mixing the crushed tailing soil with cement and water in different mass ratios, carrying out a compaction test, and measuring the optimal water content and the maximum dry density under different cement dosages; according to the optimal water content and the maximum dry density, a California bearing ratio test is carried out, and the optimal cement mixing amount is preferably selected; and producing the high-water-content tailing soil roadbed material. According to the method, the quicklime is adopted for carrying out precipitation pretreatment on the high-water-content tailing soil, and compared with a drying method in a laboratory, the feasibility in large-scale industrial production is higher.

The invention provides a construction method of a multi-element solid waste-based cementing material roadbed filler, and relates to the technical field of road engineering, and the construction method comprises the following steps: S1, selecting raw materials: fly ash, slag powder, carbide slag powder, desulfurized gypsum powder, gasified slag powder, coal gangue powder, steel slag powder, tailing powder, coal cinder powder, building solid waste powder and municipal waste powder; s2, raw material pretreatment; s3, preparing a composite exciting agent: preparing sodium sulfate, calcium hydroxide, calcium chloride, calcium sulfate, sodium silicate and sodium hydroxide; s4, preparing a composite exciting agent solution; s5, preparing a multi-element solid waste-based cementing material: uniformly mixing the raw materials pretreated in the step S2 with the composite activator prepared in the step S4 according to a ratio; s6, roadbed laying, wherein a sodium bentonite waterproof blanket is laid on the bottom layer of the roadbed and then laid; s7, geogrids are laid; s8, maintenance is conducted; through fine selection and proportioning of the raw materials, efficient resource utilization of various industrial solid wastes is realized.

The invention relates to the technical field of waste battery regeneration, and discloses a method for preparing copper powder by stripping high-purity copper foil from a negative electrode of a lithium iron phosphate battery, which comprises the following steps of: pressing copper foil into a copper block; smelting to obtain purified molten copper; performing closed centrifugal atomization to obtain copper powder; and performing low-temperature nitrogen drying, screening, demagnetizing and packaging to obtain the high-quality copper powder. By means of the method, the high-quality copper powder with the small particle size and the high apparent density can be obtained, and a high-value method is provided for recycling of the waste battery negative electrode copper foil.

The invention discloses a color-adjustable red mud-regenerated mixture environment-friendly sound barrier and a preparation method thereof. A regenerated mixture is used as a basic material, an alkali activator is added to excite potential gelation activity of red mud, a foaming agent is added to form a porous structure, and a proper amount of cement is matched to form the environment-friendly sound barrier. According to the recycled mixture, screening treatment of coarse and fine aggregates can be avoided, so that the production cost is reduced; based on the characteristic that the red mud is red, the color of the sound barrier can be changed between red and gray by adjusting the mixing amount of the red mud, and visual fatigue of a driver is helped to be relieved; acid gas components in the tail gas can be absorbed and neutralized by utilizing residual alkalinity of the red mud and the alkali activator, so that the pollution to the environment is reduced. According to the sound barrier prepared by the method, recycling of waste resources can be realized, energy consumption and carbon emission in the production and use processes of the sound barrier are reduced, the recycling level of wastes is improved, and environmental protection and sustainable development in the field of sound barriers are promoted.

The utility model relates to the technical field of highway construction, and discloses a stone washing and mud removing device for pavement construction, which comprises a table top, a spring piece II is fixedly connected to the bottom of the table top, a vibration filter plate I is fixedly connected to the outer wall of the spring piece II, and a spring piece I is fixedly connected to the outer wall of the vibration filter plate I; the outer wall of the first spring piece is fixedly connected with a second vibration filter plate, the top of the first vibration filter plate is fixedly connected with a bidirectional motor, the output end of the bidirectional motor is fixedly connected with a rotating disc, the outer wall of the rotating disc is fixedly connected with a deflection wheel, and the outer wall of the deflection wheel is fixedly connected with a connecting piece. According to the stone cleaning device, through the structures such as the vibration filter plate and the spring piece, soil and impurities attached to the surfaces of stones can be more effectively loosened and removed, so that the more thorough cleaning effect is achieved, the cleaning efficiency is improved, the problem that deep cleaning cannot be conducted only through a high-pressure water gun is solved, and the cleaning effect is improved.

The invention relates to a tin slag recovery system, and relates to the technical field of semiconductor waste recovery, the tin slag recovery system comprises a cleaning assembly, a precipitation assembly, a water backflow assembly and a tin slag cleaning assembly, the cleaning assembly can clean slag-containing articles with water to form slag-containing water, the precipitation assembly is used for receiving the slag-containing water flowing out of the cleaning assembly, and the water backflow assembly is used for backflow of the slag-containing water. The tin slag cleaning assembly is used for cleaning the slag-containing water and precipitating and layering the slag-containing water to form bottom sediment and upper-layer clear water, the water backflow assembly is connected with the cleaning assembly and the precipitation assembly so as to guide the upper-layer clear water to flow back into the cleaning assembly, and the tin slag cleaning assembly is used for cleaning the sediment in the precipitation assembly. According to the method, the requirement for new tin resources can be reduced through recycling, resource saving and reutilization are achieved, exploitation of natural resources can be reduced, and resource consumption is reduced.

The invention relates to the technical field of natural gas extraction, and discloses a gas lift pressurization mixed transportation and CNG recovery system which comprises an integrated compressor skid, a high-pressure dehydration skid and a gas generator set, the integrated compressor skid is provided with a first inlet, a first outlet, a second outlet and a third outlet, the first inlet is communicated with an external transportation pipeline through a gas inlet pipeline, and the second outlet is communicated with a second transportation pipeline through a gas outlet pipeline; the first outlet is communicated with the output pipeline through a pressurization mixed transportation pipeline, the pressurization mixed transportation pipeline is located at the downstream of the gas inlet pipeline, the second outlet is communicated with the output pipeline through a gas lift pipeline, and the gas lift pipeline is located at the upstream of the gas inlet pipeline; the high-pressure dewatering skid is provided with a recycled moisture inlet and a dewatering and sewage discharging outlet, the recycled moisture inlet is communicated with the third outlet through a CNG recycled moisture pipeline, and the dewatering and sewage discharging outlet is communicated with the gas inlet pipeline through a dewatering and sewage discharging mixed conveying pipeline; the gas generator set is electrically connected to the integrated compressor sledge and the high-pressure dewatering sledge so as to provide electric energy for the integrated compressor sledge and the high-pressure dewatering sledge.

The invention discloses a lightweight aggregate fiber reinforced precast concrete material doped with gold tailing sand and a preparation method. The concrete material is prepared from the following components in parts by weight: 200 to 300 parts of cement, 100 to 150 parts of fly ash, 150 to 200 parts of gold tailing sand, 75 to 100 parts of waste glass powder, 75 to 100 parts of steel slag, 1 to 4 parts of template agent, 5 to 10 parts of fiber, 10 to 15 parts of additive and 100 to 150 parts of water, wherein the template agent is put into water to prepare a template agent solution, the gold tailing sand, the waste glass powder and the steel slag are mixed and added into the template agent solution, the mixture is rolled in a granulator to prepare lightweight aggregate pellets, and the lightweight aggregate pellets are carbonized for use. The special lightweight aggregate and proportion are adopted, so that the concrete has the characteristics of the lightweight aggregate, is convenient to construct and transport, can be applied to building projects with strict requirements on the self weight of the structure, and reduces the production cost of the concrete to a certain extent by using wastes as part of raw materials.

The invention relates to the field of rare earth smelting wastewater treatment, and discloses a rare earth smelting salt-containing wastewater directional calcium removal and chlorine recovery recycling process which comprises the following steps: S1, standing salt-containing wastewater to obtain supernate; s2, slowly dropwise adding sulfuric acid into the supernate, standing, and filtering to remove calcium sulfate to obtain a calcium-removed solution; s3, the calcium removal solution enters a first-stage electrodialysis system to remove part of chloride ions, and diluted hydrochloric acid is obtained; and S4, filtering the deacidified desalinized solution, feeding the filtered deacidified desalinized solution into a second-stage electrodialysis system to further remove chloride ions, returning the chlorine-containing solution to the first-stage electrodialysis system, and removing chlorine to obtain a purified solution. By adopting a method of coupling directional calcium removal with electrodialysis, efficient directional recovery of calcium ions and chloride ions is realized, and high-purity calcium sulfate and diluted hydrochloric acid are successfully obtained. The process not only solves the problems of difficult treatment, high cost, high energy consumption, poor recycling effect and the like in the traditional smelting wastewater treatment, but also remarkably improves the resource utilization efficiency.

The invention relates to the technical field of mine water treatment, and discloses a mine water advanced treatment system and a mine water treatment method thereof.The mine water advanced treatment system comprises a pretreatment module, a primary treatment module, a secondary treatment module, an advanced treatment module and a disinfection and reuse module; the pretreatment module is used for removing large-size impurities and balancing water quality and water quantity; the primary treatment module is used for enabling suspended matters and part of organic matters in mine water to form flocs and removing the flocs in a precipitation manner; the secondary treatment module is used for removing macromolecular organic matters, colloidal substances, bacteria and viruses; and the deep treatment module is used for efficiently removing soluble salts, small molecular organic matters and various ions. According to the advanced treatment system for the mine water, the process of combining pretreatment, primary enhanced treatment and secondary advanced treatment is adopted, suspended solids, organic matters and heavy metal ion pollutants in the mine water can be effectively removed, the treatment effect is stable, and the quality of effluent reaches the reuse or discharge standard.

The invention relates to the technical field of foundation construction, and provides a construction process for replacing and filling construction waste in a culvert foundation, which comprises the following steps: obtaining the construction waste, sorting, classifying and pretreating the construction waste, removing impurities in the construction waste, and obtaining regenerated filler with preset grading; excavating and treating a foundation pit; and layered filling and compaction are conducted, specifically, the regenerated filler is filled into the foundation pit in a layered mode, and compaction equipment is adopted for compaction after each layer of regenerated filler is filled. By means of the arrangement, harmful impurities in construction waste can be removed, the strength, quality and uniformity of regenerated filler can be guaranteed, the uniformity of the filler can be guaranteed through layered filling, the compactness and stability of the filler can be effectively controlled, gaps in the filler can be reduced through layered compaction, the compactness and bearing capacity of each layer of filler are guaranteed, and the construction efficiency is improved. Therefore, the overall stability and bearing capacity of the foundation are ensured.

The invention provides a sulfuric acid method titanium dioxide waste acid resource reutilization process, and belongs to the technical field of waste acid recovery. Sulfuric acid in the sulfuric acid waste liquid is effectively recovered and impurities in the sulfuric acid are separated through filtering, preheating, multi-stage concentration, flash evaporation and protective separation of the sulfuric acid waste liquid generated in the preparation of titanium dioxide, so that the purity of the sulfuric acid is ensured; by means of multi-stage preheating and recycling, especially MVR evaporation combined equipment, the energy utilization efficiency is greatly improved, energy consumption is reduced, and meanwhile the operation cost is reduced.

The invention relates to low-liquidity-loss full-replacement machine-made sand pumping concrete and a preparation method thereof. The low-liquidity-loss full-replacement machine-made sand pumping concrete comprises the following components in parts by mass (kg / m < 3 >): 330-400 parts of cement, 100-150 parts of granulated blast-furnace slag powder, 60-120 parts of fly ash, 700-900 parts of machine-made sand, 800-1000 parts of coarse aggregate, 5.6-14 parts of special functional agent, 5.9-10 parts of high-efficiency water reducing agent and 150-170 parts of water. A special functional agent prepared by mixing self-made polyaspartic acid and sodium hexametaphosphate according to the mass ratio of (7: 1)-(10: 1) is adopted, efficient chelation of amino and phosphate radicals on calcium ions in stone powder on the surface of the machine-made sand is achieved, and the high-quality pretreatment requirement of the machine-made sand is met; according to the concrete, the special functional agent is mixed with the high-efficiency water reducing agent, and the unique long-chain molecular structure of the concrete can gradually play a dispersion role in a concrete system, so that the time-dependent fluidity loss of the concrete is reduced, and the working performance of the machine-made sand concrete reaching a construction site is ensured.

The invention provides high-performance recycled asphalt pavement aggregate concrete and a preparation method thereof, and belongs to the field of road engineering materials. The defect that the mechanical property of the RAP concrete is reduced along with the increase of the substitution ratio is overcome, and particularly the problem that the 100% RAP concrete is insufficient in compression resistance and splitting tensile strength is solved; the mechanical property of the RAP concrete is optimized and improved by accurately matching the RAP substitution proportion, the silica fume mixing amount, the high-efficiency water reducing agent mixing amount and the preparation process.

The application discloses a kind of converter steel slag grading efficient resource utilization method, comprising the following steps: (1) converter steel slag pretreatment, liquid converter steel slag is sequentially crushed by rolling, hot stew under pressure, rod grinding and impurity removal process to obtain pretreated steel slag;(2) grading screening, pretreated steel slag is graded using a mobile five-layer vibrating screen;(3) product adaptation treatment, 16-63mm products are used as railway ballast;5-10mm, 10-15mm products are used as road asphalt surface layer aggregate;<8 mesh products are used as steel slag sand for rust removal (4) wastewater, dust treatment and metal, waste heat recovery treatment.The application greatly improves the processing efficiency, significantly enhances the stability of the product, has outstanding environmental performance, optimizes waste heat utilization and energy consumption, has high resource utilization rate and added value, and has significant social benefits.

The invention provides an artificial stone and a manufacturing method thereof, and the artificial stone comprises the following components in parts by mass: 400-450 parts of a cementing material, 80-180 parts of an active material, 530-710 parts of aggregate, 80-100 parts of water, 10-20 parts of an additive and 0.05-0.1 part of a coating. The preparation method comprises the following steps: proportionally adding the cementing material, the active material and the aggregate into a stirrer, uniformly stirring and mixing, weighing the mixing water and the additive according to the corresponding parts by mass, adding into the prepared mixed powder, and mechanically stirring by using the stirrer according to the set time. The preparation method comprises the following steps: continuously and uniformly mixing the raw materials, injecting the mixture into a mold of a specification model after the raw materials are continuously and uniformly mixed and have good fluidity, carrying out self-leveling and vibration until no bubble overflows, carrying out mold removal after the mold removal strength is reached, putting the product into a pre-curing chamber for pre-curing, polishing the surface of the product after the pre-curing is completed, and finally spraying an inorganic glaze self-cleaning coating on the surface of the polished product to obtain the artificial stone. The artificial stone disclosed by the invention has the advantages of low production cost, simple production process, ultra-high performance, good decoration performance, strong antifouling ability and the like, is close to natural stone and can be customized, and the excellent surface antifouling and antibacterial ability can keep the decoration effect for a long time and improve the durability. The artificial stone disclosed by the invention is rich in size, shape, color and variety, can better meet the market demand, reduces the mining of natural stone, and protects the green ecological environment.

The invention discloses a recycled aggregate synergistically enhanced by a two-step mineralization method and a grain shape optimization method and a preparation method thereof, and relates to the technical field of recycled aggregates, the preparation method comprises the following steps: crushing and screening waste concrete to obtain recycled aggregate particles; soaking the recycled aggregate particles in a mixed solution of a nucleating agent and an organic substrate solution, and then transferring into a reaction kettle; uniformly spraying the bacillus pasteurii liquid on the recycled aggregate particles at one time, then maintaining for 5 hours, stirring in the maintaining process, introducing carbon dioxide gas into the reaction kettle, adjusting the temperature and the humidity, maintaining the set environmental conditions, and mineralizing and enhancing the recycled aggregate particles; and the mineralized and enhanced recycled aggregate particles and cement powder are poured into a disc granulator for particle shape optimization, and finally the synergistically enhanced recycled aggregate is obtained and has higher physical properties and self-strength.

A gas well lid powered by sound energy recovery comprises a well lid body which covers the surface of a road, a well lid inner container block is installed below the well lid body, a well lid inner container is installed in the well lid inner container block, a sound energy recovery module and a power module are installed in the well lid inner container block, and the sound energy recovery module is connected with the power module through a circuit. The sound energy recovery module converts mechanical vibration into electric charges through the piezoelectric effect, and then the electric charges are stored in the power module. Sound wave energy generated in urban traffic and pedestrian activities is utilized, dependence on traditional energy is reduced, and urban energy consumption is reduced by recovering sound energy, so that influences on mining of natural resources and the environment are reduced, and urban infrastructure equipment is more environmentally friendly and sustainable; the energy recovery system is integrated into the fuel gas well lid, extra space is not occupied, the energy recovery system and fuel gas equipment can work cooperatively, the layout of the fuel gas equipment is optimized, the space below the well lid is fully utilized, and the overall efficiency of urban infrastructure is improved.

The present invention discloses a method for recovering graphite powder from waste lithium batteries. The method for recovering graphite powder comprises the following steps: pre-treating waste lithium batteries to obtain battery cores, immersing the battery cores in water, stirring to separate graphite on the negative electrode copper foil current collector, obtaining a mixed slurry, filtering the positive electrode and performing subsequent treatment; adding a flocculant to the mixed slurry, standing it for suction filtration and separation to obtain a graphite material; acid-washing the graphite material, then washing it with water, and finally drying it to recover graphite powder. The present invention obtains graphite powder with a total metal impurity content of less than 0.1% and a carbon content of more than 99.5%, thereby improving the economic benefits of recycling lithium-ion batteries.

The invention discloses a coal ash full-amount resource utilization method and a coal ash full-amount resource utilization system for realizing valuable metal extraction. The method comprises the following steps: S1, adding high-alumina coal ash, carbide slag and a composite fluxing agent into a grinding machine, grinding, mixing and screening to obtain a raw material; s2, adding the raw material and water into a press, feeding an obtained formed blank into a roller kiln, carrying out high-temperature calcination, and crushing into fine-particle clinker by a crusher; s3, the fine particle clinker and a sodium carbonate solution are added into a leaching reactor, and an obtained leaching mixed material is fed into a first solid-liquid separation device to be separated into aluminum-rich leaching liquid and aluminum extraction residues; s4, the aluminum-rich leachate and calcium oxide are added into a desilication reactor, and obtained mixed material liquid is fed into a second solid-liquid separation device to be separated into desilication aluminum-rich leachate and aluminum extraction residues; and S5, adding the desiliconized aluminum-rich lixivium and carbon dioxide into a carbon component reactor, and feeding an obtained carbon component mixed material into a third solid-liquid separation device to be separated into aluminum hydroxide and waste liquid. The method can be used for extracting Al (OH) 3 from high-alumina fly ash, and has the advantages of low energy consumption and high purity.

The invention discloses an integrated well structure taking water from the lower portion and recharging the upper portion and a construction method, and aims to reduce the water level in a foundation pit, and solve the phenomenon of consolidation and sinking of a soil body by adopting a tube well dewatering and peripheral recharging well supplementing method. In order to effectively solve the problem of a working face on a construction site, a well wall structure is invented, water is taken from the lower portion, recharge is conducted on the upper portion, the water head pressure at the bottom of a foundation pit is effectively released, and the gushing phenomenon at the bottom of the pit is reduced. Meanwhile, the damage to the side wall enclosure structure of the foundation pit caused by water streaming can be reduced, the burial depth part of the aquifer is defined, construction precipitation is conducted in a targeted mode, exploitation of underground water resources is reduced, electric energy and water resources are saved in green and environment-friendly construction, and the construction cost is reduced. And peripheral building cracking, ground subsidence and underground pipeline fracture caused by stratum consolidation brought by rainfall are reduced, the construction working face is effectively reduced, mutual interference between different working procedures is reduced, and the space working face is saved.

The invention discloses an industrial waste residue eco-friendly water-permeable brick and a preparation method thereof, and relates to the technical field of water-permeable bricks. The eco-friendly water-permeable bricks include the following raw materials in parts by weight: industrial waste residue: 80-100 parts, cement: 10-12 parts, deionized water: 30-50 parts, filler: 10-12 parts, surfactant: 2-5 parts, binder: 5-10 parts. The present invention prepares a transparent colloidal solid by toluene 2,6-diisocyanate and PEG800, and then reacts the transparent colloidal solid with 1,2,4-tricarboxylic anhydride to prepare intermediate 1, and grafts intermediate 1 onto 3,3'5,5'-tetramethylbiphenyl bisphenol diglycidyl ether through a ring-opening reaction, and finally grafts organosilicon onto a modified resin to prepare a binder with strong adhesion. The eco-friendly water-permeable bricks prepared by the present invention have the characteristics of good compressive strength, high water permeability coefficient and good wear resistance.

The invention discloses a recycled concrete slope protection brick, and belongs to the technical field of slope protection bricks, the recycled concrete slope protection brick comprises a brick body, the brick body is formed by pressing and curing a recycled concrete raw material, a permeable vegetation structure is integrally formed on the brick body, the permeable vegetation structure comprises a first planting cavity and a second planting cavity, and a vegetation card is poured on one inner wall of the permeable vegetation structure; a receding groove is formed in the position, corresponding to the vegetation clamp, of the lower surface of the brick body, the lower end of the vegetation clamp extends into the receding groove, and the inner wall, opposite to the vegetation clamp, of the water-permeable vegetation structure is designed to be of a downwards-concave inclined face structure. The recycled coarse aggregate and the recycled fine aggregate which are prepared by crushing and screening construction waste are adopted as main raw materials, a large amount of construction solid waste can be consumed, natural gravel exploitation is reduced, energy consumption and environmental pollution are reduced, a large-volume water-permeable vegetation structure is integrated in the brick body, rapid infiltration of rainwater can be achieved, the elastic vegetation cards are embedded in the brick body, and the brick body can be recycled. When vegetation is planted, the vegetation can be automatically and elastically clamped, and the vegetation is prevented from being washed off by rainwater or water flow.