1670 results about "Phosphorus" patented technology

The invention discloses a process and system for recovering phosphorus and fluorine from ardealite leachate, which comprises the following steps: feeding the ardealite leachate into an induced crystallization reactor for induced crystallization, discharging generated large-particle fluorapatite crystals from a crystal discharge port at the bottom of the induced crystallization reactor, and collecting and recycling; aluminum hydroxide flocs and fine-particle fluorapatite crystals enter a cyclone separator along with the effluent, the fine-particle fluorapatite crystals are separated and then flow back to the induced crystallization reactor, the aluminum hydroxide flocs form precipitates in the flocculation sedimentation tank through flocculation to be removed, and the effluent of the flocculation sedimentation tank enters a multi-stage treatment system. According to the method disclosed by the invention, fluorine and phosphorus in the phosphogypsum leachate are recovered together, the recovered fluorapatite finished product is high in purity and can be recycled, and the amount of chemical sludge is also greatly reduced, so that the treatment cost of the sludge is reduced.

A double cold rolled non-oriented electrical steel sheet having a composition including: 0.0001%≤Carbon≤0.007%, 0.1%≤Manganese≤0.2%, 3.1%≤Silicon≤3.6%, 0.8%≤Aluminum≤1.1%, Phosphorus≤0.15%, Sulfur≤0.006%, Nitrogen≤0.09%, and can contain various optional elements. The remainder composition being iron and unavoidable impurities caused by processing, the microstructure is made of ferrite and has in area fraction, 80% to 100% recrystallized microstructure, 0% to 20% non-recrystallized microstructure wherein the average grain size of recrystallized microstructure is from 20 microns to 110 microns and having a percentage of eddy current losses in total iron losses, measured at 1 T and 400 Hz according to IEC 60404-2 standards, is from 35% to 45% when calculated in accordance of Bertotti method and simultaneously having a magnetic polarization at 5000 A / m (J50) from 1.64 T to 1.66 T.

A double cold rolled non-oriented electrical steel sheet having a composition including, expressed in percentage by weight: 0.0001%≤Carbon≤0.007%, 0.15%≤Manganese≤0.3%, 3.2%≤Silicon≤3.8%, 0.8%≤Aluminum≤1.1%, Phosphorus≤0.15%, Sulfur≤0.006%, Nitrogen≤0.09%, and can contain various optional elements. The remainder composition being iron and unavoidable impurities caused by processing, the microstructure is made of ferrite and has in area fraction, 80% to 100% recrystallized microstructure, 0% to 20% non-recrystallized microstructure wherein the average grain size of recrystallized microstructure is from 20 microns to 110 microns and having a percentage of eddy current losses in total iron losses, measured at 1 T and 400 Hz according to IEC 60404-2 standards, less than 30% when calculated in accordance of Bertotti method and simultaneously having a magnetic polarization at 5000 A / m (J50) from 1.66 T to 1.69 T.

A double cold rolled non-oriented electrical steel sheet having a composition including of the following elements, expressed in percentage by weight: 0.0001%≤Carbon≤0.007%, 0.1%≤Manganese≤0.3%, 3.1%≤Silicon≤3.8%, 0.6%≤Aluminum≤0.8%, Phosphorus≤0.15%, Sulfur≤0.006%, Nitrogen≤0.09%, and can contain various optional elements. The remainder composition is iron and unavoidable impurities caused by processing. The microstructure ferrite and has in area fraction, 80% to 100% recrystallized microstructure, 0% to 20% non-recrystallized microstructure wherein the average grain size of recrystallized microstructure is from 20 microns to 110 microns and having a percentage of eddy current losses in total iron losses, measured at 1 T and 400 Hz according to IEC 60404-2 standards, of 40 to 50% when calculated in accordance with Bertotti method and simultaneously having a magnetic polarization at 5000 A / m (J50) from 1.66T to 1.7T.

The invention discloses a neodymium iron boron magnet with a protective film and a manufacturing method thereof, and the manufacturing method specifically comprises the following steps: S1, pretreating a plurality of raw materials to ensure the purity and cleanliness of the raw materials; s2, the pretreated materials are mixed in proportion and smelted to prepare uniform neodymium-iron-boron alloy; s3, the smelted alloy is crushed, and particle powder meeting the requirement is prepared through jet mill equipment; s4, the powder is put into a mold, forming orientation is conducted through a magnetic field press, and the maximum residual magnetism is obtained; s5, performing high-temperature sintering on the molded magnet to improve the density and the magnetic performance of the molded magnet; s6, the sintered magnet is machined, and the needed size and shape are obtained; s7, carrying out pretreatment on the surface of the magnet, and carrying out aftertreatment after chemical nickel plating to ensure the quality of a plating layer; according to the method, the surface of the neodymium-iron-boron magnet is coated with a high-phosphorus chemical nickel layer in a plating mode, the magnet can be effectively prevented from being corroded by the external environment, and the service life of the magnet is prolonged.

A non-oriented electrical steel sheet having a composition including of the following elements, expressed in percentage by weight: 0.0001%≤Carbon≤0.007%, 0.21%≤Manganese≤0.7%, 3%≤Silicon≤3.6%, 0.7%≤Aluminum≤1.3%, Phosphorus≤0.15%, Sulfur≤0.006%, Nitrogen≤0.09%, with 3.85%≤Si+Al+Mn≤5.5%, and can contain various optional elements. The remainder composition being composed of iron and unavoidable impurities. The microstructure is ferrite and has in area fraction, 80% to 100% recrystallized microstructure, 0% to 20% non-recrystallized microstructure wherein the average grain size of recrystallized microstructure is from 20 microns to 110 microns and having a percentage of eddy current losses in total iron losses, measured at 1 T and 400 Hz according to IEC 60404-2 standards, from 35% to 45% and simultaneously having a magnetic polarization at 5000 A / m (J50) from 1.63T to 1.66T.

The invention relates to the technical field of sludge reduction and resource utilization, in particular to a method for resource utilization of sludge gasification slag. According to the method, municipal sludge gasification slag is smashed and then subjected to acid leaching, acid leaching liquid and acid leaching slag are obtained, iron in the acid leaching liquid is recycled, meanwhile, the acid leaching slag is subjected to alkaline leaching, under the strong alkaline condition, a calcium source is added into alkaline leaching liquid, then calcium phosphate sediment can be obtained, and iron in alkaline leaching separation liquid is recycled; a calcium ion solution can be generated in the processes of recovering iron in the pickle liquor and refining calcium phosphate, and the obtained calcium ion solution can be used as a calcium source for comprehensive utilization. The method disclosed by the invention can be used for realizing extraction and resource utilization of phosphorus, iron, aluminum and calcium in the sludge gasification slag, and has important significance on environmental protection and resource saving.

A kind of preparation method of high compaction lithium iron phosphate of multistage gradation, including step one: iron source, phosphorus source, lithium source, carbon source, dispersing agent, element dopant and solvent are dispersed according to proportion, slurry after dispersion is divided into A, B, C three slurry according to proportion, three slurry are grinded respectively, and then are respectively carried out spray drying;Step two: three spray materials are respectively pre-sintered at different temperatures, and pre-sintered material is respectively crushed;Step three: the material after pre-sintering is mixed to realize multistage particle gradation.Certain mass ratio of carbon source and pre-crushed material are dry mixed;Step four: after secondary sintering, crushing and magnetic removal process, the multistage gradation high compaction lithium iron phosphate positive material is obtained.The present application realizes particle gradation of once sintered material, secondary carbon coating and sintering strengthening by grading particle size design, and realizes the collaborative improvement of compaction density and specific capacity of lithium iron phosphate positive material.

The invention discloses a KTP type sodium-rich phosphate positive electrode material and a preparation method and application thereof, the chemical formula of the phosphate positive electrode material is NaxV1-yTyPO4F1-zOz, 1 < x < = 2, 0 < y < = 1, and 0 < = z < = 1; the preparation method of the material comprises the following steps: adding a vanadium source, a T source, a phosphorus source and a fluorine source in a stoichiometric ratio into a reaction kettle containing a reaction solvent, adding an ammonium source to keep the pH value to be 6-10, maintaining the temperature to be 120-250 DEG C, and reacting for 2-24 hours; naturally cooling, and washing with clear water to obtain a (NH4) xV < 1-y > TyPO4F < 1-z > Oz precursor; the preparation method comprises the following steps: fully grinding an excessive sodium source and a (NH4) xV < 1-y > TyPO4F < 1-z > Oz precursor, carrying out Na < + > / NH4 < + > molten salt exchange in a tubular furnace at 60-400 DEG C for 1-48 hours, introducing inert gas during reaction, and washing an obtained product with a washing solvent after the reaction is finished to remove the excessive sodium source; and drying in a drying oven at 50-250 DEG C for 1-30 hours to obtain the KTP type sodium-rich phosphate positive electrode material. By utilizing the induction effect of KTP configuration on V-O or T-O bonds, the voltage of V and T transition metal related redox couple is increased, and the energy density is improved.

The invention provides a preparation method of grain size grading iron phosphate and high compaction type lithium iron phosphate. Removing impurities from the titanium dioxide byproduct ferrous sulfate, and filtering to obtain a purified ferrous sulfate base solution; the method comprises the following steps: reacting phosphoric acid with ammonia water to prepare ammonium phosphate solutions with different reaction pH values and phosphorus molar concentrations, respectively mixing the ammonium phosphate solutions with a certain amount of hydrogen peroxide, and sequentially adding an iron source, a first phosphorus salt solution, a second phosphorus salt solution and a third phosphorus salt solution into a tubular reactor for reaction to obtain iron phosphate slurry; and sequentially converting, filtering, washing, drying and calcining the completely reacted slurry to finally prepare the anhydrous iron phosphate. According to the invention, a mode of controlling solution nucleation and growth is adopted, nucleation and growth rates are controlled by preparing phosphorus salt solutions with different concentrations, size grading of precursor particles is directly realized in a synthesis reaction section, and slurry grading uniformity is further realized through aging crystal transformation. Lithium iron phosphate prepared from the iron phosphate precursor has high compaction density.

The invention discloses a non-autoclaved prestressed concrete pipe pile and a preparation method thereof, and relates to the field of fish culture. According to the autoclave-free prestressed concrete pipe pile and the pipe pile preparation method, through collaborative innovation of a material system and process design, comprehensive breakthrough is achieved in the aspects of mechanical properties, environmental protection benefits and environmental adaptability; in the aspect of technical performance, the hydration activity in a low-temperature environment is remarkably improved due to introduction of the phosphorus slag and the composite exciting agent in the cementing material, so that the compressive strength of the pipe pile in 28 days in the environment of-20 DEG C reaches 95% or above of a standard value (embodiment 3: 98.0 MPa), and meanwhile, the compactness of concrete is improved by 20% or above due to optimal grading of the nickel ore slag sand and the two-graded broken stone; after 300 times of freezing and thawing cycles, the mass loss is only 2.8% (embodiment 1), the chloride ion permeability coefficient is as low as 1.4 * 10 <-12 > m < 2 > / s, and the anti-permeability and durability are obviously superior to those of a traditional autoclaved pipe pile (contrast experiment: freezing and thawing loss rate reaches 46%).

The invention belongs to the technical field of vanadium enrichment mechanisms of phosphorus vanadium ores, and discloses a research method of a vanadium enrichment mechanism in a diagenetic stage of phosphorus vanadium ores, which comprises the following steps: S1, sample collection and treatment; s2, rock ore identification and mineral composition analysis; s3, analyzing the occurrence state and microcell morphology of vanadium; s4, performing geochemical analysis on the whole rock; s5, in-situ microcell geochemical analysis is carried out; s6, phosphorus nodule analysis; s7, comprehensive analysis and mineralization model establishment; according to the method, mineralogy, total rock geochemistry, micro-area surface scanning and other multi-scale and multi-means research methods are comprehensively utilized, and the vanadium occurrence state, the ore-forming fluid evolution and the phosphorus-vanadium coupling relation are finely described; in-situ microcell geochemical analysis is introduced into phosphorus nodule analysis, the internal structure, the growth sequence and element distribution of the phosphorus nodule are directly revealed, obvious frontier and systematicness are achieved, and reliable theoretical support is provided for accurate exploration of vanadium ore resources and green and efficient dressing and smelting process research and development.

The invention discloses a phosphorus-nitrogen-silicon synergistic flame retardant containing a POSS (Polyhedral Oligomeric Silsesquioxane) structure and a preparation method of the phosphorus-nitrogen-silicon synergistic flame retardant. The flame retardant integrates three elements of phosphorus, nitrogen and silicon, and can generate a better flame-retardant synergistic effect; meanwhile, the POSS structure and the phenyl structure in the flame retardant endow the flame retardant with good heat resistance and good compatibility with a matrix material polycarbonate (PC), and the flame retardant is suitable for high-temperature processing conditions. In addition, the preparation method of the flame retardant is simple in process, the yield reaches up to 85% or above, and industrial production is easy to achieve.

The invention discloses an enhanced metal-based composite water purifying agent and a preparation method thereof, belongs to the technical field of preparation of water purifying agents, and aims to solve the technical problem that the flocculation capacity and the stability of a composite water purifying agent in the prior art need to be further improved. The preparation method specifically comprises the following steps: preparing a water purifying agent skeleton dispersion liquid by using chitosan and sodium alginate; chitosan-sodium alginate is used as a porous framework, a polyphenol-multi-metal complex is loaded, a structure is enhanced through Ca < 2 + > crosslinking, then SiO2 is used for coating to improve acid and alkali resistance and stability, and finally PAC is introduced to realize rapid flocculation. In the preparation process, the organic framework, the metal complex and the inorganic coating layer are fully compounded through pH control and step-by-step dropwise adding, and the obtained composite water purifying agent can efficiently remove phosphorus, chromium and suspended solids in water and shows a remarkable synergistic purification effect and storage stability.

The invention relates to the technical field of inorganic compound preparation, and particularly discloses a method for preparing high-purity iron phosphate through low-temperature acidolysis of phosphated residues, which comprises the following steps: washing, drying and crushing the phosphated residues to obtain phosphated residue powder; carrying out low-temperature acidolysis reaction on the phosphated residue powder and inorganic acid in an aqueous medium at 60-90 DEG C to obtain an acidolysis solution; adding an oxidizing agent into the acidolysis solution, adjusting the pH value of the system to 2.5-4.5 at 65-85 DEG C, carrying out oxidation impurity removal, and filtering to obtain an iron-containing phosphate solution; and selectively supplementing an iron source according to the molar ratio of iron to phosphorus in the solution, adjusting the pH value to 1.0-3.0, and carrying out precipitation reaction at 65-75 DEG C to generate iron phosphate. According to the method, low-energy-consumption resource utilization of the phosphated residues is achieved by combining low-temperature acidolysis with oxidation impurity removal and component regulation and control, the product purity meets the battery-grade requirement, and the method is suitable for preparing the lithium battery positive electrode material precursor.

The invention relates to a dephosphorization material, a preparation method thereof and a dephosphorization method, belongs to the field of water treatment, and solves at least one of the problems of contradiction between adsorption capacity and structural stability, fast capacity fading, short service life, difficult recovery, higher cost and the like of the existing lanthanum-based dephosphorization material. The phosphorus removal material is a nano-porous carbon-supported lanthanum composite material, and comprises an amorphous nano-porous carbon matrix, an amorphous nano-porous carbon carrier, an amorphous nano-porous carbon carrier, and an amorphous nano-porous carbon carrier, and an active component embedded in situ in the nanoporous carbon matrix; wherein the active component comprises lanthanum oxide and / or lanthanum hydroxide. According to the invention, the adsorption capacity is high, the structure is stable, the attenuation of the adsorption capacity is delayed, the service life is prolonged, the cost is reduced, and the adsorbent can be recycled.

The invention provides a sulfide solid electrolyte and a preparation method of the sulfide solid electrolyte. The sulfide solid electrolyte is a phosphorus-free solid electrolyte, and has a chemical general formula as shown in a formula I: Li < 7-m > MS < 6-m-n > OnXm, wherein M comprises at least one of As, Sb and Bi, and X comprises at least one of F, Cl, Br and I and 1lt; mlt; mlt; 2, 0.5 < = nlt; and 3, the sulfur-oxygen ratio S / O in the formula I is greater than 1. The sulfide solid electrolyte has excellent ionic conductivity and air stability.

The invention relates to the technical field of iron phosphate preparation, in particular to a preparation method of low-impurity iron phosphate with a high iron-phosphorus ratio, which at least comprises the following steps: preparing an iron source solution and a phosphorus source solution; mixing an oxidizing agent and a phosphorus source solution as a phosphorus source mixed solution; adding the phosphorus source mixed solution into the iron source solution, and controlling the molar ratio of iron to phosphorus to be 1: (1.1-1.3) to prepare slurry; dividing the slurry into two parts, respectively adding an impurity removal agent, and then carrying out segmented aging at 90 DEG C to prepare crystallized slurry; and filtering, washing, drying and calcining the crystallized slurry to obtain a target product iron phosphate finished product. The impurity removal agent is selected from one or more of ferrous sulfate, ferrous chloride, ferrous nitrate and ferrous oxalate. Seed crystals are formed through segmented aging crystal transformation to promote crystal growth, and autonomous grain size distribution is achieved; an impurity removing agent is added in the aging stage, impurities are reduced by using the same ion effect, the iron-phosphorus ratio is increased, and the compaction density and the electrical property of the prepared lithium iron phosphate are remarkably improved.

A non-oriented electrical steel sheet having a composition of the following elements, expressed in percentage by weight: 0.0001%≤Carbon≤0.007%, 0.09%≤Manganese≤0.15%, 2.5%≤Silicon≤3%, 0.1% ≤ Aluminum≤0.5%, Phosphorus≤0.15%, Sulfur≤0.006%, Nitrogen≤0.09%, and can contain various optional elements, the remainder composition being composed of iron and unavoidable impurities caused by processing, the microstructure of the steel sheet being made of ferrite and including in area fraction, 80% to 100% recrystallized microstructure, 0% to 20% non-recrystallized microstructure wherein the average grain size of recrystallized microstructure is from 20 microns to 110 microns and having a percentage of eddy current losses in total iron losses, measured at 1 T and 400 Hz according to IEC 60404-2 standards, from 35% to 45% when calculated in accordance of Bertotti method.

The invention discloses a method for determining the content of phosphorus in activated carbon for wine, and relates to the field of detection of food processing assistants.The method comprises the steps that phosphorus standard solutions and phosphorus determination reagents are mixed to prepare phosphorus standard solutions with different concentrations, and phosphorus standard series working solutions are prepared; extracting phosphorus in the activated carbon by using aqua regia, preparing a to-be-detected solution by using the same method as the standard solution, and respectively determining absorbance of the phosphorus standard series working solution and the to-be-detected solution by using a spectrophotometer; and quantifying by adopting an external standard method, and calculating the phosphorus content in the activated carbon sample for filtering the wine. The method provided by the invention can realize accurate qualitative and quantitative analysis of the phosphorus content in the activated carbon for filtered liquor, effectively solves the problem that no standard method for detecting the phosphorus content in the activated carbon for filtered liquor exists in the liquor industry on the premise of meeting the analysis accuracy, and is simple and convenient, low in detection cost, good in repeatability of the analysis method and high in stability.

The invention discloses a method for regulating and controlling the content of available phosphorus in soil based on organic carbon-inorganic carbon, and belongs to the technical field of cultivated land conservation. The preparation method comprises the following steps: firstly, carrying out carbonization treatment on straws to obtain straw biochar; uniformly mixing the basalt powder, the straw biochar and the soil to form mixed soil, and planting crops for cultivation. After the soil is cultivated by the method, the contents of organic carbon and inorganic carbon in the soil are increased, so that the content of available phosphorus is regulated and controlled; and the crop growth condition is good.

The invention belongs to the technical field of preparation of phosphorus removal agents, and particularly relates to a composite phosphorus removal agent and a preparation method and application thereof. The composite phosphorus removal agent comprises a honeycomb carrier and microspheres, the microspheres are loaded on the honeycomb carrier; the microspheres are prepared from the following raw materials: polyvinylidene fluoride particles, graphene oxide, ZrOCl2 and phosphorus-accumulating bacteria. The composite phosphorus removal agent comprises a honeycomb carrier, microspheres and microcapsules, wherein the microspheres and the microcapsules are loaded on the honeycomb carrier; capturing phosphate radicals in a water body by the microspheres and carrying out biological phosphorus removal and adsorption phosphorus removal; the honeycomb carrier also has the effect of adsorbing phosphate; and the two synergistically remove phosphate in the water body, so that the phosphorus removal effect of the phosphorus removal agent is improved, and the burden of the water body is not increased.

The invention discloses a moss ecological brick and a preparation method thereof, and relates to the technical field of ecological restoration, the moss ecological brick comprises a moss gametophyte matrix and a brick body, the brick body comprises the following raw materials: a tailing composite material, metakaolin, an acid activator and water, and the tailing composite material comprises phosphate tailings and iron tailings. The phosphate tailings and the iron tailings can provide necessary phosphorus elements, other trace elements and the like for the growth of the moss, and the acid activator in the brick body not only can provide a weak acid environment to facilitate the good growth of the moss, but also can solve the problem of saltpetering of the brick body in the environment; the growth of the moss can effectively relieve sulfate erosion of the acid-activated material, and a good curing environment is provided for the acid-activated concrete brick body. Therefore, in the moss ecological brick provided by the invention, the acid-activated concrete brick body can supplement and promote the growth of moss.

The application discloses a kind of synchronous denitrification and phosphorus removal light materials and its preparation and application method, belong to environmental functional materials and sewage treatment technical field.The application is obtained by fully melting and dispersing sulfur and iron-based component, and the iron-based component is a mixture of pyrite and calcium-magnesium carbonate.The molten mixture is foamed to form a synchronous denitrification and phosphorus removal light material.The synchronous denitrification and phosphorus removal light material has high porosity, large specific surface area, light weight and high reactivity.The light material is used as a microbial carrier and an electron donor for biochemical reactions, and is applied to fixed bed, fluidized bed and other reactors for sewage treatment.The light material has good microbial adhesion performance, high denitrification rate and good phosphorus removal effect.

The invention relates to a process for preparing a phosphor copper rod by using a phosphonate-amide composite purifying agent as a quenching aid, and belongs to the technical field of non-ferrous metallurgy. Phosphorus pentoxide and sodium carbonate are mixed and decocted into fused salt, the fused salt is cooled and ground and then added into a corundum crucible together with scrap copper to be rapidly heated, compressed air is blown in, and slagging-off is conducted after heat preservation and standing; blowing mixed gas into the melt for reduction refining; adding calcium boride into the melt for refining; the refined copper liquid is subjected to continuous casting and continuous rolling; rapidly immersing the phosphorus copper rod subjected to continuous casting and rolling into a quenching aid solution, and carrying out quenching treatment; and the quenched phosphor copper rod is blow-dried and dried, and the high-conductivity phosphor copper rod is obtained. The high-purity phosphorus copper rod prepared by the method is excellent in key indexes of copper content, phosphorus content and conductivity, and meets the expected requirements of high purity and high conductivity.

The present invention provides a method for preparing high-stability two-dimensional black phosphorus. First, a phosphorus source and an iodine source are introduced into a reaction system for preliminary preheating and activation. After being fully activated in the raw material area of ​​the reaction system, they are slowly transferred to the crystal growth area of ​​the reaction system. The phosphorus source and the transport agent flow through the liquid to the catalyst and are fully converted in the intermediate formation area. The converted intermediate slowly moves to the crystal nucleation growth area to begin crystal nucleation and growth. After further sufficient reaction, the crystal nucleation growth point continues to extend and grow, and finally the black phosphorus crystal slowly nucleates and grows in blocks. After the crystal growth is completely cooled to room temperature, the unconverted raw materials are reused until they are finally converted into black phosphorus crystals and tail gas. The tail gas is absorbed and converted into other by-products. The use of high-temperature and high-pressure resistant pipelines can achieve efficient transportation of gaseous phosphorus, thereby extending the growth time of black phosphorus crystals and improving the growth efficiency of black phosphorus crystals.

The invention belongs to the technical field of trichlorosilane purification, and discloses an adsorbent for adsorbing phosphorus impurities in trichlorosilane and a preparation method and application thereof.The preparation method comprises the steps that activated carbon is immersed in a solution containing ammonium metavanadate and oxalic acid, ultrasonic treatment and drying are conducted, and a vanadium oxide / carbon material mixture is obtained; calcining the vanadium oxide / carbon material mixture, and performing reduction treatment to obtain the oxygen vacancy-rich activated carbon loaded vanadium oxide adsorbent. The activated carbon loaded vanadium oxide adsorbent rich in oxygen vacancies is prepared by using a dipping-calcining-reducing method, and phosphorus impurities are adsorbed and removed by using the interaction of the activated carbon loaded vanadium oxide adsorbent and PCl3. The active carbon loaded vanadium oxide adsorbent rich in oxygen vacancies interacts with PCl3, so that trace PCl3 can be efficiently removed.

The invention relates to the technical field of wet-process phosphoric acid, and discloses a wet-process phosphoric acid grading and arsenic removal treatment method and system, and the system can be switched between a parallel grading treatment mode and a series depth treatment mode through flow control; in the parallel mode, the two arsenic removal reaction tanks operate independently to respectively treat different raw materials and produce desulfurized acid for industrial monoammonium and low-arsenic dilute phosphoric acid for high-phosphorus compound fertilizer, the low-arsenic dilute phosphoric acid is mixed and blended with untreated dilute acid and then concentrated, qualified products are obtained with the minimum treatment capacity, and the cost is remarkably reduced; in the series connection mode, raw materials sequentially flow through the two tanks to be deeply purified, and single high-quality phosphoric acid is produced; the two modes are both integrated with efficient filter pressing units, solid-liquid separation is carried out on arsenic-containing thick slurry generated by arsenic removal, and phosphorus resource recovery and arsenic pollution control are achieved; the device has production flexibility and deep purification capacity, perfectly meets the requirements of raw material fluctuation and multiple products, and thoroughly solves the problem of arsenic slag disposal.

The invention discloses a phosphorus slag ceramsite lightweight thermal insulation concrete structure preparation control system and method, and particularly relates to the technical field of building material preparation, and the method comprises the following steps: collecting ceramsite physical information, establishing a multi-dimensional parameter set, and setting a component mapping rule; ceramsite space configuration is completed according to mapping; the prepared ceramsite is subjected to surface pretreatment and mixed to form preformed concrete, and the preformed concrete is cured after performance evaluation; maintenance is controlled according to a multi-section temperature and humidity linkage path, and whether the next section is entered or not is judged by the trained machine learning model; when the conditions are not met, the control conditions are updated through optimization steps, and judgment is executed again until all the curing processes are completed; according to the invention, the performance matching configuration of the phosphorus slag ceramsite in the structure is realized, and the preformed concrete is maintained after the performance of the preformed concrete reaches the standard; and through path analysis and state judgment, the multi-section curing process is dynamically regulated and controlled, and the performance consistency and control precision of the concrete structure are improved.

The invention relates to the field of ecological environment and digital simulation, in particular to a phosphorus pollution risk evaluation method and system based on a migration and transformation mechanism. A phosphorus pollution risk evaluation method based on a migration and transformation mechanism comprises the following steps that S10, at a preset sampling point position of a preset drainage basin, various data are collected according to preset parameter types, and the parameter types comprise various parameter types needed by a preset mechanism model and a preset output coefficient model; sorting the collected data according to a collection time sequence, and establishing a space-time matching database; and S20: extracting parameter types in the database, defining a cross-medium migration relationship of phosphorus based on physical parameters, constructing a conversion relationship of a corresponding form in combination with parameters of chemical and biological types, and dividing factor types. According to the scheme, the problem of low evaluation accuracy caused by insufficient sensitivity of analysis results of a static evaluation method and a dynamic evaluation method based on a simplified model in phosphorus pollution risk evaluation is solved.