16results about How to "Optimize chemical composition" patented technology

The invention provides an amine low-water-content absorbent for capturing carbon dioxide and application of the amine low-water-content absorbent. The amine low-water absorbent comprises, by mass, 20%-50% of an absorbent main agent, 35%-70% of an auxiliary solvent and 2%-20% of water, and the range of a solvent effect factor delta of the amine low-water absorbent is 0.28-0.32. According to the method, the composition of the water-less absorbent is screened and optimized through a solvent effect factor formula, the amine water-less absorbent which is easy to desorb, low in regeneration energy consumption and low in viscosity characteristic is obtained, and wide application of the amine water-less absorbent in a carbon capture technology is promoted.

The invention discloses a fuel cell rapid activation method, and relates to the technical field of fuel cells, and the activation method comprises the steps of early-stage preparation, electrode pretreatment, activation reagent injection, activation treatment, post-treatment and evaluation and optimization. The method has the advantages that the electrochemical impedance spectrometer is used for state inspection of the electrode and other components in the electrode pretreatment stage, the reliability of the fuel cell to be detected is ensured, the surface of the electrode is deeply cleaned through the cleaning agent and the ultrasonic cleaning machine, dust, oil stains and impurities on the surface of the electrode can be effectively removed, and the detection accuracy is improved. Meanwhile, the microstructure and chemical composition of the surface of the electrode are improved by utilizing a plasma technology, and the catalytic activity and corrosion resistance of the electrode are improved, so that the activation efficiency and the operation stability of the fuel cell are improved, and potential abnormities can be found and treated in time by evaluating the performance in real time; and the fuel cell is ensured to operate in an optimal state.

The invention discloses novel high-strength and high-toughness hot work die steel and a preparation method thereof, and belongs to the technical field of material preparation. The steel comprises the following chemical components in percentage by mass: 0.25%-0.45% of C, 0.35%-0.65% of Si, 0.34%-0.56% of Mn, 0.72%-0.96% of Ni, 2.35%-2.89% of Cr, 2.28%-2.56% of Mo, 0.95%-1.25% of Co, 0.86%-1.26% of V, 0.25%-0.48% of Nb, less than or equal to 0.015% of P, less than or equal to 0.01% of S and the balance of Fe and inevitable impurities. On the basis of the universal hot work die steel, Co is added to improve the high-temperature strength and thermal stability of the die steel, the Cr element is reduced, the tempering resistance of the die steel is improved, and the Mo, V and Nb elements are beneficial to precipitation of secondary carbides in the tempering process so as to improve the obdurability. In the preparation process, film-shaped retained austenite which is distributed in a dispersed mode and is high in mechanical stability is introduced into the structure of the die steel through the quenching partition technology, so that the die steel material has high strength and meanwhile has high toughness, and the die steel material can be used in the working environment with complex working conditions.

The invention discloses a fluoride corrosion resistant photovoltaic panel self-cleaning coating which is prepared by reaction of the following raw materials: a component A, a component B and 10-20 parts of nano nickel oxide, the component A is organic silicon modified fluorocarbon resin, the component B is an organic silicon modified fluorocarbon resin curing agent, and the nano nickel oxide is an organic silicon modified fluorocarbon resin curing agent. The component B is prepared from the following components in parts by weight: 100 to 120 parts of hexamethylene diisocyanate tripolymer, 35 to 45 parts of monohydroxyl terminated polydimethylsiloxane and 30 to 35 parts of octafluoro-1, 6-hexanediol; all the parts represent parts by weight. The fluoride corrosion-resistant photovoltaic panel self-cleaning coating disclosed by the invention can effectively resist the corrosion effect of fluoride, and also needs to have an excellent self-cleaning function.

The invention belongs to the technical field of metallurgical materials, and particularly relates to a steel casting and a preparation method and application thereof. The preparation method of the steel casting comprises the following steps that preparation raw materials of the steel casting are smelted, and a melt is obtained; the melt, a deoxidizing agent and a refining agent are mixed for deoxidizing refining and pouring, and a blank casting is obtained; and the blank casting is subjected to heat treatment, and the steel casting is obtained. By optimizing the chemical components of the steel casting, improving the purity of the molten steel through the deoxidizing agent and the refining agent and optimizing the heat treatment method and control parameters, the low-temperature impact toughness of the steel casting cast by the medium-frequency induction furnace can be obviously improved, and the use safety of bridge construction under the extremely cold weather condition can be met; and the production cost of the steel casting is reduced, and resource consumption and environmental pollution are reduced.

The present invention relates to the field of roller casting technology, and more specifically to an anti-stripping roller material and a heat treatment process for a high-speed wire pre-finishing mill. The chemical components of the anti-stripping roller material for a high-speed wire pre-finishing mill include: C, Si, Mn, Cr, Ni, Mo, V, W, Nb, Fe and unavoidable impurities; the heat treatment process of the roller material includes annealing and quenching and tempering, wherein the quenching and tempering steps include: a first heating and heat preservation, a second heating and heat preservation, a third heating and heat preservation, spray quenching and high-temperature tempering. The present invention adopts a new material and a high-performance roller material prepared by a new material and a heat treatment process thereof, which solves the problems of short service life and frequent spalling of raw material rollers, improves production efficiency, reduces production costs, and has a good prospect for promotion and application.

This invention discloses a method for preparing rare-earth-containing guide materials for producing steel profiles. The chemical composition of the rare-earth-containing guide material, by weight percentage, is as follows: C 0.80–2.30%; Si 0.10–0.65%; Mn 0.85–2.50%; P ≤0.020%; S ≤0.025%; V ≤0.03%; Cr 0.65–1.35%; Mo 0.06–0.77%; RE content ≥0.0020%; and the remainder being Fe and unavoidable impurities. The preparation method includes steelmaking processes and ingot rolling processes. The purpose of this invention is to provide a method for preparing rare-earth-containing guide materials for producing steel profiles, and to smelt and prepare guide materials with good strength and toughness ratios and excellent wear resistance.

The invention relates to a hot-dip galvanized aluminum magnesium coated steel plate with a fine surface and a preparation method thereof, and belongs to the technical field of coating and plating. The coated steel plate comprises a steel substrate and a zinc-aluminum-magnesium coating attached to at least part of the surface of the steel substrate, and the zinc-aluminum-magnesium coating comprises the following chemical components in percentage by mass: 2-7% of Mg, 5-14% of Al, 0.05-1% of Si, 0.05-0.5% of Fe and Zn; the surface of the zinc-aluminum-magnesium coating contains alpha-Al dendritic crystals, and the average length of primary dendritic crystal arms of the alpha-Al dendritic crystals is smaller than or equal to 50 micrometers. By accurately controlling the contents of main elements such as Mg, Al, Si and Fe in the zinc-aluminum-magnesium coating and adding trace elements such as Sr, Zr, Ce, La, B, Ti, Ca and Y when necessary, the chemical composition of the coating can be optimized, so that the primary dendritic arm length of alpha-Al dendritic crystals in the forming process of the coating is obviously reduced, and the finally obtained steel plate has excellent properties such as fine surface, high flatness and high corrosion resistance.

The invention relates to the technical field of steel smelting, in particular to casting powder special for high-aluminum steel and application of the casting powder, and the casting powder contains BaO, Li2O, B2O3, CaO, SiO2, Al2O3, MgO, R2O and C; wherein the mass fraction of the BaO is 0.4%; the mass fraction of the Li2O is 2.5%; the mass fraction of the B2O3 is 0.6%; the mass fraction of the CaO is 20%; the mass fraction of the SiO2 is 38%; the mass fraction of Al2O3 is 3%; the mass fraction of MgO is 2%; the mass fraction of the R2O is 10%; the R2O is Na2O and / or K2O. According to the casting powder, by optimizing the chemical components of the casting powder and adjusting the physical properties of the casting powder, the casting powder has the low alkalinity of 0.5-0.6, the high F <-> content of 7%-8% in mass fraction of F <->, the low melting temperature, the melting point of 900-950 DEG C and the high viscosity, the viscosity of the casting powder is 0.30-0.40 Pa.s at the temperature of 1300 DEG C, and the casting powder can be used for casting powder casting. Through improvement of the performance, a series of problems caused by high aluminum content in the production process of the high-aluminum steel are solved, so that the casting powder can better meet the continuous casting requirement of the high-aluminum steel, and powerful technical support is provided for large-scale and high-quality production of the high-aluminum steel.

The invention discloses a method for topping Yunyan 87. The method comprises the steps that tobacco plant transplanting is completed from April 25 to May 5, and classified jointing and topping are carried out according to different growth vigor (early blossoming, poor growth vigor, general growth vigor, good growth vigor and good growth vigor) of tobacco plants. The method specifically comprises the following steps: in early flowering and topping, a method of'topping without leaf removal 'is adopted, the pitch is lengthened by 5cm, 16 leaves are reserved, and the plant height is controlled to be 80-85cm after topping; the growth vigor is poor, 18 leaves, 20 leaves, 22 leaves and 24 leaves are reserved on common tobacco plants, good tobacco plants and good tobacco plants respectively, and the plant heights are controlled to be 90-95 cm, 100-105 cm, 110-115 cm and 120-125 cm. Tests prove that the method remarkably improves the tobacco leaf yield and economic benefits, the average output value per mu and the first-class tobacco proportion are greatly improved, and the method is superior to a traditional topping method. The method can effectively solve the problems of unreasonable group structure and low tobacco yield and quality in the low-latitude and high-altitude tobacco area.

The invention discloses a preparation method of an anti-bird droppings photovoltaic panel self-cleaning coating. The invention relates to a high-temperature-resistant coating, which is prepared from the following raw materials in a solvent through reaction: 45 to 60 parts of octamethylcyclotetrasiloxane, 90 to 120 parts of tetramethyltri-3-trifluoropropyl cyclotetrasiloxane, 10 to 12 parts of tetramethyldihydroxydisiloxane, 1 to 3 parts of heptadecafluorodecyl trimethoxysilane, 70 to 80 parts of octa (3-hydroxy-3-methylbutyl dimethyl siloxane), 2 to 5 parts of silicon dioxide aerogel and 18 to 20 parts of nano titanium dioxide. 1.5 to 3 parts of tetramethylammonium hydroxide and 45 to 60 parts of monohydroxyl-terminated polydimethylsiloxane. The coating has excellent bird droppings resistance, pollutants such as bird droppings and the like can be removed from the surface under the action of self gravity through wind blowing or rainfall washing, and the surface of the photovoltaic panel is kept clean for a long time.

The invention relates to a method for manufacturing a GH696 alloy high-performance cold-drawn material, and belongs to the technical field of metal processing. The GH696 alloy is an aging strengthening type high-temperature alloy and is mainly used for manufacturing fasteners, and a traditional production process of the GH696 alloy is difficult to meet the requirement that the tensile strength is larger than 1600 MPa in some special industries. Therefore, the invention provides a manufacturing method combining cold drawing deformation and heat treatment so as to improve the tensile strength of the alloy, and the specific manufacturing method comprises the following steps: firstly preparing a GH696 alloy bar, carrying out cold drawing after turning treatment, then carrying out aging heat treatment in a heat treatment furnace, and finally improving the material quality through straightening and polishing procedures. Experimental results show that the tensile strength of the cold-drawn material produced by the method is obviously superior to that of the cold-drawn material produced by a traditional method, and the problem of insufficient tensile strength in the prior art is solved. The manufacturing method provided by the invention provides effective technical support for popularization of the GH696 alloy in the high-strength application field.

The invention provides a method for opening a new furnace by using high-silicon molten iron in a 120-ton dry dedusting converter, belongs to the technical field of steel smelting, and solves the problem that the difficulty of opening the new furnace by using the high-silicon molten iron in the existing dry dedusting converter is large. The method comprises the following steps: converter loading: loading molten iron and scrap steel into a 120-ton top-bottom combined blown converter; oxygen supply by the converter: igniting and supplying oxygen after the converter is loaded; the auxiliary materials are added for the first time after ignition, the auxiliary materials are added for the second time, the active lime is added in batches, and then the limestone and the active lime are added in batches; and converter end point control. According to the method, the converter quantity, the scrap steel quantity and the molten iron quantity are reasonably controlled, the complexity and uncertainty in the production process can be reduced, the stable molten pool depth of the converter in the smelting process can be ensured by accurately controlling the charging quantity, and therefore the production efficiency and the product quality are improved, the production cost is reduced, energy consumption is optimized, and the economic benefit is increased. Unnecessary energy consumption and waste generation are reduced, and environmental protection and sustainable development are facilitated.

The invention discloses a preparation method for eliminating black filament defects on the surface of a 5-series aluminum alloy plate strip, and relates to the technical field of aluminum alloy processing, in particular to the preparation method for eliminating the black filament defects on the surface of the 5-series aluminum alloy plate strip. The invention aims to solve the problem of black filament defect in the existing 5-series aluminum alloy plate strip rolling process. The method comprises the following steps: 1, weighing: weighing smelting raw materials in proportion; the weighed smelting raw materials are partially smelted, and aluminum alloy melt is obtained; 2, casting; 3, heating with uniform fire, and cooling to room temperature along with the furnace; 4, sawing head and tail casting head areas and cold shut areas, and milling large surface and end surface surface oxide skin; 5, placing the flat cast ingot in a heating furnace, keeping the constant temperature at 470 DEG C, and keeping the temperature until the flat cast ingot is discharged from the furnace for hot rough rolling; sixthly, hot finish rolling is conducted, and a hot-rolled coiled material blank is obtained; and seventhly, the hot-rolled coiled material blank is subjected to thinning rolling through a cold-rolling mill, and the 5-series aluminum alloy coiled material blank without the black wire defect on the surface is obtained. The method is used for eliminating the black filament defect on the surface of the 5-series aluminum alloy plate strip.

The application discloses a growth promoter for improving the seedling emergence rate of cotton in saline-alkali soil, and the salt resistance of cotton seed germination is improved by using rapeseed euricin regulator and GABA permeation regulator; the stable agent formed by strong acid materials such as urea phosphate can quickly reduce the pH value and saline-alkali of the soil tillage layer; meanwhile, the urea phosphate, amino acid, fulvic acid and auxiliary materials provide certain nutrient substances for seedling crops; the cooperation among raw materials fundamentally improves the salt tolerance of cotton seedling, not only improves the seedling emergence rate of cotton, but also can quickly reduce the pH value of saline-alkali soil in Xinjiang after dissolving water, improves the chemical composition of soil, reduces the salt content and alkalinity of soil, creates a good environment for crop growth, and after application, the soil salt content is below 20 g / kg, the pH value is below 7.5, the seedling emergence rate of cotton is above 70%, which is more than 30% higher than that of the control, and the yield of cotton in saline-alkali soil in Xinjiang is significantly increased, thereby providing technical support for rural revitalization.

The invention relates to the technical field of constructional engineering materials, in particular to sludge-based premixed mortar and a preparation method thereof. The invention relates to sludge-based premixed mortar, which is prepared from the following raw materials in parts by mass: 200 to 250 parts of cement, 500 to 550 parts of sludge-based admixture, 400 to 450 parts of fine aggregate, 12 to 15 parts of modified fiber filler, 5 to 6 parts of exciting agent, 8 to 12 parts of efficient water reducing agent and 120 to 150 parts of water. According to the sludge-based ready-mixed mortar, waste resources are recycled, meanwhile, the comprehensive performance of the mortar is improved, the production cost is reduced, and the sludge-based ready-mixed mortar has obvious environmental protection benefits and conforms to the development trend of green building materials.