38 results about "Alum" patented technology

The invention belongs to the technical field of waste residue recycling, and provides a resourceful treatment method of a lithium-containing material. By means of leaching, metal (Al, K, Na, Cs, Rb, Li, Ca, Mg, Fe, Tl and other heavy metal) in the lithium-containing material can be leached out, and harmlessness of the lithium-containing material is achieved; the brine rich in metal salt is oxidized to remove iron and thallium, so that iron, thallium and other heavy metals in the brine can be fixed and removed in a hydroxide form; cooling crystallization is carried out, so that alkali metal ions and aluminum in the brine can be fixed and removed in the form of aluminum sulfate alum salt; the carbonate precipitation can fix and remove metal ions such as aluminum, calcium and magnesium in the brine in the form of carbonate; magnesium and calcium in the brine can be fixed and removed in the form of calcium-magnesium mud through impurity removal; after evaporation and concentration, recovery of lithium carbonate is realized, and recovery of sodium sulfate is realized through evaporation and crystallization. According to the resourceful treatment method, valuable metal in the lithium-containing material is recycled, and harmless treatment is achieved.

The invention discloses a method for efficiently recovering resources from brown corundum ash, which comprises the following steps: step 1, carrying out BCFA magnetic separation to remove iron, mixing and stirring according to a solid-to-liquid ratio of 1: 5, enabling the solution to flow through a magnetic rod, repeating for three times to remove most metal iron in the solution, and enriching fine-fraction ash powder by wind classification; according to the method, BCFA ash is mixed and stirred according to the solid-to-liquid ratio of 1: 5, the solution flows through a magnetic rod and is repeated for three times, most of metal iron in the solution is removed, iron is recycled in the solution, then gallium is adsorbed to the alkaline metal solution through alkaline resin, the gallium is separated from other metals, and the BCFA ash is obtained. And further separating to obtain metal aluminum when the metal aluminum has a precipitation effect when the pH value is 13, so that iron powder is obtained firstly, alum is recycled under an acidic condition, gallium white carbon black and aluminum are recycled under an alkaline condition, and multi-stage utilization of products is realized.

The invention relates to the technical field of chemical production, and provides a gypsum-based inorganic cementing material and a preparation method and application thereof.The gypsum-based inorganic cementing material is prepared from, by mass, 30%-50% of anhydrous gypsum, 20%-30% of semi-hydrated gypsum, 5%-10% of quick lime and 5%-30% of aluminum sulfate or alums, and the sum of the mass percentages of all the components is 100%. Calcium formate or calcium nitrate accounts for 5-10%, copperas accounts for 0-10%, and sodium metaaluminate accounts for 0-10%. According to the gypsum-based inorganic cementing material as well as the preparation method and the application thereof provided by the technical scheme, the core technical bottleneck of environmental problems caused by massive stockpiling of industrial byproduct gypsum and poor water resistance of products is effectively solved, and high-added-value resource utilization of the industrial byproduct gypsum is realized.

The invention provides a method for extracting rubidium and cesium from mixed salt or solution containing rubidium and cesium, which comprises the following steps: S1, providing a raw material, and purifying an ionic solution containing rubidium and cesium to obtain a solution containing rubidium and cesium; s2, aluminum sulfate and sulfuric acid are added into the solution containing rubidium and cesium for preferential crystallization of cesium, and a first batch of aluminum alum crystals and a first mother solution are obtained; s3, dissolving and purifying the first batch of alumen crystals to obtain high-purity cesium salt; s4, sequentially carrying out evaporation concentration and crystallization separation on the first mother liquor to obtain a second batch of alumen crystals and a second mother liquor; and S5, fusing and purifying the second batch of alumen crystals to obtain high-purity rubidium salt, and returning the second mother liquor to the step S1 for recycling, and the method has the effects of high extraction recovery rate and low cost.

The invention discloses a method for extracting metal salts and metals from polymetallic ores or polymetallic materials. The method comprises the following steps: 1) raw material pretreatment: crushing and grinding raw materials into particles; 2) full-wet dissolution extraction: leaching corresponding acid, a corresponding oxidant, a corresponding catalyst and water from the product obtained in the step 1) by using the required metal, stirring and heating to boiling until the required metal in the raw materials is dissolved in the liquid; (3) carrying out solid-liquid separation on the leached product in the previous step, and carrying out mother liquor cooling on the mother liquor subjected to the solid-liquid separation to separate metal elements which can be subjected to alum formation and metal elements which cannot be subjected to alum formation; and (4) sequentially separating out salts of metal elements capable of forming vitriol from the metals capable of forming vitriol according to a sequence from strong vitriol forming capability to weak vitriol forming capability of the metals. The problems that in the prior art, cost is high, and pollution to the environment is large are solved.

The present disclosure is directed to apparatus and method for more efficiently and effectively refining alum process residue into commercially useable compounds. Materials that contain aluminum or aluminum oxide are provided to a vessel where a chemical rection is controlled when a product is made. Materials that include aluminum can be provided to the vessel and acid can also be provided to the vessel to initiate a chemical reaction. Masses of respective materials provided to the vessel can be controlled according to a regimen for making a product. Temperatures of the vessel can be monitored and controlled while the reaction occurs. Activated carbon may be added to the vessel to help the product performance and stability. Once the product is formed, it is output from the vessel and cooled. The product can be subsequently processed using techniques such as grinding and screening when a final product is prepared.

The application discloses a short-process lithium extraction method of lithium clay ore, and belongs to the technical field of lithium extraction. 3+ The main component of the alunite formed in the form of alum is XAl3(SO4)2(OH)2 (X is Na or K). The alunite is insoluble in water and slightly soluble in sulfuric acid, has good crystallinity, and has less adsorption and entrainment of free ions, and almost no entrainment of lithium. The application fully utilizes the characteristics of the alunite, converts Al 3+ into alunite precipitation which is dissolved from the lithium ore by acid, reduces the Al / Li ratio of the leaching solution, and finally collects lithium in the form of lithium carbonate by using the calcium-magnesium resin to adsorb a small amount of calcium and magnesium ions.

The invention relates to the field of wind energy map data processing, in particular to an admixture for tower drum concrete and a preparation method and application thereof.The admixture is prepared from, by weight, 10-15 parts of silica fume, 15-30 parts of microbeads, 15-25 parts of superfine slag powder, 15-25 parts of fly ash, 5-7 parts of structural self-waterproofing agent and 1-3 parts of shrinkage reducing agent; the structural self-waterproofing agent is selected from at least one of xerogel, a modified expanding agent, fluosilicate, zeolite powder, sodium gluconate, sodium pyrophosphate and sodium dodecyl sulfate; the shrinkage reducing agent is a polyacrylate emulsion, the polyacrylate emulsion comprises an acrylate monomer and a modifier, and the modifier comprises at least one of polyethylene glycol, propylene glycol, nano silicon dioxide, glycerol, sodium silicate and alum. The problems of hydration heat control and appearance improvement can be solved at the same time.

The invention relates to the technical field of metallurgical solid waste treatment and comprehensive utilization of resources, in particular to a coprecipitation process for all-component high-value utilization of silicomanganese metallurgical fly ash, which comprises the following steps: washing the fly ash by using 20% + / -5% dilute sulfuric acid, adjusting the concentration of a sulfate solution to coprecipitate calcium magnesium alum, adding manganese powder for replacement, and crystallizing at high temperature to obtain manganese sulfate; potassium sulfate, sodium chloride and the like are byproducts. According to the technology, the high raw material recovery rate is achieved through the multi-stage countercurrent leaching and coupling selective precipitation technology, the purity of battery-grade manganese sulfate is larger than or equal to 99.5%, and meanwhile the low-aluminum requirement of the silicon fertilizer raw material is met. The process is efficient and environment-friendly, and the resource utilization rate and economic benefits are remarkably improved.

The invention relates to the technical field of acid-making tail gas treatment and leaching systems of zinc hydrometallurgy, and discloses a zinc hydrometallurgy acid-making tail gas desulfurized liquid recycling method which comprises the following steps: performing two-stage absorption desulfurization on acid-making tail gas by using a sodium hydroxide solution to generate sodium nitrite absorption liquid; carrying out aeration oxidation on the sodium nitrite absorption liquid to obtain oxidized liquid mainly containing sodium sulfate; the oxidized liquid is sent to a leaching process to wash zinc-containing filter residues; and finally, returning the slag washing liquid to the alum precipitation process, so that sodium ions in the slag washing liquid are utilized as a alum precipitation agent. The two-stage sodium hydroxide desulfurization process is adopted, the desulfurization efficiency is high, meanwhile, the sodium nitrite absorption liquid generated through desulfurization is completely oxidized and reused in the production process, external discharge of the wastewater is thoroughly eliminated, zero discharge of the desulfurized liquid is achieved from the source, and the pressure of tail-end sewage treatment of enterprises and the environmental protection risk are greatly relieved.

The present application relates to the technical field of coagulant aid, and discloses a tailing dewatering coagulant aid as well as a preparation method and application thereof.The tailing dewatering coagulant aid comprises the following components in parts by weight: corn cob extract 90-110 parts; polyacrylamide 9-11 parts; acetaldehyde 3-5 parts; ethylene oxide 3-5 parts; potassium hydroxide 1-3 parts; methanol 1-3 parts; magnesium chloride 1-3 parts; yeast 0.5-1 part; alum 1-3 parts; activated carbon 3-5 parts; and water 50-60 parts.The present application uses corn cob of natural plant corn as the main raw material, and uses the coagulant aid with corn cob extract as the main component to capture the suspended particles in the coal mine tailing slurry, so that the turbidity removal rate is high; the formed coagulum has a large volume, fast settling and high coagulation efficiency; the unit coagulant aid demand usage amount increases limitedly, but the unit demand amount of inorganic substances and organic compounds in the coagulant aid is greatly reduced, and the present application is more environmentally friendly and safe.

A method is described for controlling the amount of aluminium in a sulphate-based aluminium containing matrix, the method comprising adding ammonium sulphate in stochiometric ratio of from about 0.1: 1 to greater than 1: 1 to the aluminium sulphate concentration of the sulphate-based aluminium containing matrix to form ammonia alum, and separating the ammonia alum.

The embodiment of the present application provides a method for recovering copper and aluminum from copper-coated aluminum processing waste, and relates to the technical field of hydrometallurgy. The method comprises the following steps: using an electrolytic cell provided with an anion exchange membrane, the anion exchange membrane separates the electrolytic cell into an anode area and a cathode area; placing the copper-coated aluminum processing waste as an anode in the anode area and a cathode in the cathode area; filling the anode area with an anolyte containing sulfuric acid and an alkali metal sulfate, the alkali metal being potassium, rubidium or cesium; filling the cathode area with a catholyte containing sulfuric acid and copper sulfate; electrolyzing under power, depositing metallic copper at the cathode, generating alum precipitate in the anode area, and recovering the metallic copper and the alum precipitate respectively. The method for recovering copper and aluminum from copper-coated aluminum processing waste in the embodiment of the present application electrolyzes the copper-coated aluminum processing waste by electrolysis, the copper in the waste is preferentially dissolved, the exposed aluminum is synchronously dissolved and immediately combined with alkali metal ions and sulfate radicals in situ to generate alum precipitate, thereby realizing efficient and complete separation of copper and aluminum components.

The invention relates to the technical field of food processing, and discloses alum-free composite vermicelli and a preparation method thereof.The composite vermicelli is prepared from, by mass, 75-95 parts of sweet potato powder, 10-20 parts of potato powder, 3-5 parts of corn starch, 2-4 parts of polysaccharide composition, 0.03-0.05 part of vegetable gum composition, 0.05-0.1 part of composite salt, 0.2-0.3 part of protein and water. The preparation process without addition of alum is adopted, the situation that ingestion of aluminum elements in traditional vermicelli is harmless to human health is avoided, the composite vermicelli prepared from multiple raw materials adopts the two-stage water adding gelatinization and aging treatment process, the proportion is scientific, the elasticity and toughness of the vermicelli are improved, the good taste is kept, the vermicelli is more smooth, boil-proof and not prone to breakage, and the vermicelli is suitable for being eaten by people. The dried bean curd is rich in nutrition, tough and chewy in taste, suitable for large-scale industrial production and capable of meeting the requirements of consumers for healthy food.

The present application relates to a kind of vanadium electrolyte based on acidic vanadium-rich liquid and its preparation method.The technical scheme is: in acidic vanadium-rich liquid, ammonium sulfate or ammonia is added, low-temperature ammonium alum crystallization is carried out to remove aluminum, and clear liquid is obtained after solid-liquid separation;After adding reducing agent to the clear liquid, the pH value is adjusted to 0.5-1.5, and the original liquid is obtained;The original liquid is extracted with saponified organic phosphonic acid extractant, and the loaded organic phase is washed with dilute acid and then back-extracted with sulfuric acid;The back-extracted liquid obtained by back-extraction is deoiled to obtain vanadium electrolyte.The present application has low preparation cost, is environment-friendly, has low extraction pH value and wide technical adaptability, the prepared vanadium electrolyte product has high concentration and high battery efficiency, effectively realizes the separation of impurities and the enrichment of vanadium in acidic vanadium-rich liquid.

The application discloses a kind of based on non-complex state manganese oxidation technology's reclaimed water preparation method, it is related to reclaimed water preparation technical field, including following material: phosphate buffer, potassium permanganate, ferrous sulfide, modified chitosan, modified polyaspartic acid, glutamic acid diacetic acid tetrasodium;The application maintains water quality alkaline environment by adding phosphate buffer, greatly inhibits the risk of toxic gas generated by ferrous sulfide hydrolysis, guarantees the safety of preparation process;The modified chitosan added, by electric neutralization and adsorption bridging, small precipitate is quickly flocculated into sedimentable alum flower, realizes mud-water separation;By adding modified polyaspartic acid, can prevent the scale formed by precipitation in irrigation pipeline or equipment, and glutamic acid diacetic acid tetrasodium synergistic effect, jointly ensure the chemical stability of reclaimed water in storage and conveying process, protect irrigation system, water quality long-term stability.

This invention discloses a method for producing high-purity cesium phosphate using mother liquor after lithium extraction from lepidolite. The method utilizes the waste liquid generated after lithium extraction from lepidolite as raw material, and adds auxiliary materials such as acidifying reagents and aluminum precipitation and desulfurization reagents. Through processes including precipitation of sodium-potassium mixed salt, acidification precipitation of alum, recrystallization purification, aluminum precipitation and desulfurization, concentration crystallization, and centrifugal drying, high-purity cesium phosphate is produced with a product purity exceeding 99.9%. This method has a wide availability of raw materials, high energy utilization rate, simple and feasible process, low equipment investment, low cost, short production cycle, high efficiency, and does not generate new waste, making it environmentally friendly. It effectively realizes the comprehensive reuse of lithium precipitation mother liquor, improves the economic value of lepidolite, reduces the production cost of lithium extraction from ore, saves cesium resources, and reduces waste liquid pollution. It can be widely applied to the industrial production of lithium extraction from lepidolite.

The invention relates to a method for pressure reduction leaching of zinc leaching residues, and belongs to the technical field of zinc hydrometallurgy. According to the technical scheme, the method comprises the steps that S1, acid liquor is added into a mixed material of zinc leaching residues and zinc concentrate for first pressure leaching, compressed air is introduced into the acid liquor and the mixed material, so that hydrogen sulfide gas is prevented from being generated, and the content of Fe < 3 + > in first leaching liquor is controlled; and S2, acid liquor is added into the first pressurized underflow to be subjected to second pressurized leaching, oxygen is introduced into the acid liquor and the first pressurized leaching underflow, and the temperature and final acidification are controlled to prevent lead-iron-vitriol from being generated. When Fe < 3 + > is reduced, the amount of sulfuric acid in the system is not increased, the reaction time is short, the energy consumption is low, the leaching rate of zinc, iron and copper is high, and the lead-silver-sulfur slag rate is low.

The invention discloses an ardealite purification and innocent treatment method and application, and particularly relates to the technical field of ardealite treatment.The ardealite purification and innocent treatment method comprises the following steps that ardealite is screened in a classified mode through a double-layer vibrating screen, mechanical impurities with the particle size larger than 100 micrometers are removed, 5-100-micrometer undersize materials are collected and ground through an airflow mill till the specific surface area is larger than or equal to 200 m < 2 > / kg, and pretreated ardealite is obtained. A multi-stage purification system is realized through ultrasonic and ozone synergistic washing in combination with alum sludge modified zeolite adsorption and membrane separation interception, an impurity adsorption layer on the surface of ardealite can be effectively destroyed by an ultrasonic cavitation effect, organic pollutants can be effectively decomposed by ozone oxidation, and phosphorus, fluorine ions and iron-series impurities are accurately captured by an adsorbent, so that the purification efficiency is improved. Residual pollutants are deeply intercepted by a membrane system, finally, the removal rate of phosphorus and the removal rate of fluorine both exceed 95%, toxic and harmful impurities in the phosphogypsum are effectively removed, and purification and harmless treatment of the phosphogypsum are efficiently achieved.

This invention relates to the field of wastewater treatment technology, specifically a method and system for microwave-assisted treatment of electroplating wastewater and recovery of valuable metals. The method includes pretreatment based on specific characteristics, advanced treatment, and resource recovery. Pretreatment is used for acidic cleaning, cyanide-containing, chromium-containing, and copper-nickel-containing wastewater, employing microwave-Fenton, microwave, microwave-assisted, and microwave gas-liquid membrane processes respectively. Advanced treatment utilizes a multi-layer coupled reaction tower to achieve microwave radiation, catalytic ammonia nitrogen decomposition, and ZIF-8@cellulose adsorption. Resource recovery employs segmented acid washing desorption-electrowinning to recover copper and nickel, chromium alum crystallization, and calcination to produce ZnO. The system includes corresponding pretreatment, advanced treatment, and resource recovery units. This invention achieves high pollutant removal rates, copper and nickel recovery rates exceeding 98%, energy consumption per ton of water of 4.8 kW·h, and metal recovery revenue covering over 130% of treatment costs.

The present invention belongs to the field of iron alum slag reduction and comprehensive utilization of solid waste in the smelting and recycling industries, and specifically provides a molten salt conversion method for an iron alum phase, wherein an iron alum phase having a chemical formula of MFe3(SO4)2(OH)6 is mixed with molten salt and then subjected to molten salt roasting at a temperature of 200-450°C to convert the iron alum phase into M3Fe(SO4)3; wherein M is Na, K, NH4 + At least one of the following: the molten salt is in a molten salt state at the roasting temperature, and the molar ratio of the molten salt to the iron vitriol phase is greater than 5. The present invention also provides a method for utilizing slag containing an iron-vanadium phase, such as a typical iron vitriol slag. The method of the present invention can achieve gentle and highly selective conversion of the iron-vanadium phase.

The application provides a purification method of sodium tetrachloroaluminate. The method comprises the following steps: S1, adding byproducts of sodium tetrachloroaluminate in the production process of methyl dichlorophosphine into water in batches for dissolution; S2, configuring an aqueous solution of zirconium oxychloride octahydrate, adding the aqueous solution into the aqueous solution of sodium tetrachloroaluminate at a certain speed, continuously heating and stirring for a certain time after the addition is completed, cooling to room temperature after adding anionic polyacrylamide into the system when fine white gel-like alum flowers appear in the system, and gradually cooling to room temperature until white solid precipitates with larger particles appear in the system; S3, filtering the reaction liquid to obtain a first filtrate, and the filter cake is a zirconium complex of total phosphorus impurities; and S4, adding a composite composed of zeolite, hematite and activated carbon into the first filtrate, stirring at room temperature for a certain time, standing, filtering to obtain a second filtrate, and the total phosphorus content and zirconium ion content in the second filtrate can meet the requirements of subsequent preparation of polyaluminum chloride.

The application discloses a high-crystalline-water-content aluminum ammonium alum slag resourceful treatment method, which comprises the following steps: putting aluminum ammonium alum slag and silicon dioxide powder into a microwave reactor, wherein the aluminum ammonium alum slag is produced in a beryllium oxide smelting process, the main component of the aluminum ammonium alum slag is NH4Al(SO4)2·12H2O, and the water content of the aluminum ammonium alum slag is 40%-50%, and then performing microwave heating to obtain dried aluminum ammonium alum slag; and then performing high-temperature calcination to obtain a calcined sample which can be applied to the preparation of refractory materials. The method can realize efficient dehydration of the aluminum ammonium alum slag, effectively solve the problem of material puffing in the heating process and affect the treatment efficiency, greatly reduce the Be content of the leaching toxicity of the calcined product, has the advantages of good drying effect, short treatment process, full-component resource utilization, and meets the requirements of safe, efficient and green treatment of the aluminum ammonium alum slag.

The invention belongs to the technical field of extraction of lithium from lepidolite, and discloses an improved fluorine chemical extraction method of lithium from lepidolite. The method comprises the following steps: S1, crushing lepidolite and fluoride together; adding a solid material obtained after crushing into a sulfuric acid solution with the concentration of 50-90wt%, heating to 80-95 DEG C, and stirring to react for 1-3 hours to obtain viscous slurry; s2, the viscous slurry is introduced into a rotary kiln to be roasted for 1-6 h at the temperature of 800-900 DEG C; s3, crushing a solid material obtained after roasting, adding water for water leaching treatment, and filtering to obtain silicon slag and brine; s4, adding calcium oxide into the brine to adjust the pH value of the brine to 10-14, and filtering to realize primary impurity removal; adding water-soluble carbonate into the brine obtained after the first-time impurity removal, and filtering to realize second-time impurity removal, so as to obtain purified liquid; and S5, adding a lithium precipitation agent into the purified liquid to carry out lithium precipitation reaction, and filtering to obtain a lithium salt product. Roasting of the rotary kiln not only solves the problem of aluminum impurities in the water leaching process and eradicates the problem of treatment of the byproduct alum, but also reduces the problem of subsequent brine impurity removal, and further improves the lithium recovery rate.

The invention discloses a resource utilization method of potassium, aluminum, sulfur, rubidium and cesium, which can efficiently recover aluminum, potassium and rubidium sulfate resources and is used for producing lithium carbonate from lithium ores, and the method comprises the following steps: carrying out dehydration treatment and high-temperature roasting treatment on a byproduct alum to obtain a roasted material and acid gas; performing multi-stage absorption on the acid gas to prepare a first sulfuric acid solution and a second sulfuric acid solution; adding the roasted material into water, stirring and dissolving, and carrying out solid-liquid separation to obtain crude aluminum oxide and potassium sulfate enriched liquid; freezing and crystallizing the potassium sulfate enriched liquid, and separating out potassium sulfate crystals and crystallization mother liquor containing rubidium and cesium; mixing the crystallization mother liquor with the lithium precipitation mother liquor to obtain rubidium and cesium enriched liquor; extracting the rubidium-cesium enriched liquid to obtain a cesium-containing organic phase and a rubidium-containing water phase; the cesium-containing organic phase is subjected to reverse extraction, and a cesium sulfate solution and an inactivation extraction agent are obtained; extracting the rubidium-containing water phase to obtain a rubidium-containing organic phase and raffinate; and the rubidium-containing organic phase is subjected to reverse extraction, and a rubidium sulfate solution and an inactivation extraction agent are obtained.

The present application relates to a kind of methods for separating carbon-lead mixed concentrate by flotation, belonging to the technical field of mineral processing, carbon-lead mixed concentrate is ground after superfine, add water to the pulp concentration of 10-15%; Add sulfuric acid, iron chloride and alum in turn and aerate stirring, passivate the surface of galena in carbon-lead mixed concentrate;Add foaming agent (2# oil) to carry out carbon roughing to obtain carbon rough concentrate and roughing tailings, separate carbon rough concentrate and roughing tailings storage;Add foaming agent (2# oil) to roughing tailings to carry out two carbon roughing, and the tailings of scavenging are lead concentrate.The present application obtains lead concentrate, and the lead grade is greater than 65%, and the lead recovery rate is greater than 98%;Galena is passivated and flocculated agglomeration by using iron chloride and alum, and the separation of carbon-lead mixed concentrate does not need to add depressor to depress galena, which simplifies the reagent system of carbon-lead separation, and ideal separation effect is obtained.

The invention discloses a reclaimed water preparation method based on a non-complexing state manganese oxidation technology, and relates to the technical field of reclaimed water preparation, the reclaimed water preparation method comprises the following materials: a phosphate buffer agent, potassium permanganate, ferrous sulfide, modified chitosan, modified polyaspartic acid, and tetrasodium glutamate diacetate; the alkaline environment of water is maintained by adding the phosphate buffer agent, the risk that hypertoxic gas is generated by hydrolysis of ferrous sulfide is greatly inhibited, and the safety of the preparation process is guaranteed; the added modified chitosan quickly flocculates tiny precipitates into settleable alumen ustum through charge neutralization and adsorption bridging, so that mud-water separation is realized; by adding the modified polyaspartic acid, scale can be prevented from being separated out and formed in an irrigation pipeline or equipment, and the modified polyaspartic acid and the tetrasodium glutamate diacetate have a synergistic effect, so that the chemical stability of the reclaimed water in the storage and transportation processes is jointly ensured, an irrigation system is protected, and the water quality is stable for a long time.

The application provides a composite phase change material and a preparation method and application thereof, and particularly relates to the technical field of functional materials. The composite phase change material comprises modified carbon nanotubes and double-temperature phase change materials loaded on the surface of the modified carbon nanotubes; the double-temperature phase change materials comprise paraffin and aluminum potassium sulfate dodecahydrate; the modified carbon nanotubes have C=O stretching vibration absorption peaks at 1698±2 cm ‑1 , C-O stretching vibration absorption peaks at 1310±2 cm ‑1 , and C-O-C stretching vibration absorption peaks at 1219±2 cm ‑1 and 1171±2 cm ‑1 . The modified CNTs form a through heat conduction network in the composite material, the heat conductivity is improved, the interface combination of paraffin and alum water is enhanced, the phase separation and alum dehydration are inhibited, and the dispersion stability, wide-temperature synergistic heat storage, heat conduction enhancement and cycle durability are improved.

The invention relates to the technical field of water purification, in particular to a water purifying agent and a preparation method thereof.The water purifying agent is prepared from, by weight, 50-60 parts of modified zeolite powder, 20-30 parts of activated carbon, 8-10 parts of alum, 3-5 parts of quartz sand and 0.1-0.5 part of potassium hydrogen persulfate. The modified zeolite powder is subjected to acid pickling reaming and surface functional modification, and a multistage pore channel and active site synergistic effect system is constructed. Inherent micropore channels of zeolite are dredged through acid pickling, and the ion exchange capacity is improved. Strong chelating groups are introduced through grafting of the phosphonic acid-based copolymer, so that obligate capture of heavy metal ions is realized. Amino groups are protonized to form a positive potential interface, so that anion pollutants such as phosphate are effectively adsorbed. And through a synergistic mechanism of physical adsorption, chemical chelation and electrostatic interaction, the removal spectrum of pollutants is obviously expanded.

The invention discloses a resourceful treatment method for aluminum ammonium alum slag with high crystal water content, which comprises the following steps: putting the aluminum ammonium alum slag with the main component of NH4Al (SO4) 212H2O, the water content of 40-50% and silicon dioxide micro powder generated in the beryllium oxide smelting process into a microwave reactor for microwave heating to obtain dried aluminum ammonium alum slag, and then roasting at high temperature to obtain the aluminum ammonium alum slag with high crystal water content. And roasting samples which can be applied to preparation of refractory materials are obtained. According to the method, efficient dehydration of the aluminum ammonium alum slag is achieved, the problem that the treatment efficiency is affected by material puffing in the heating process is effectively solved, meanwhile, the content of toxic Be leached from a roasted product is greatly reduced, and the method has the advantages of being good in drying effect, short in treatment process and capable of achieving full-component resource utilization and meets the requirement for safe, efficient and environment-friendly treatment of the aluminum ammonium alum slag.