10180 results about "Aluminium" patented technology

The invention relates to the field of image processing, in particular to a copper-aluminum dissimilar metal welding quality detection method based on image processing, and the method comprises the steps: obtaining a gray level image of a welding image of copper-aluminum dissimilar metal, constructing gray level co-occurrence matrixes according to a preset direction, and carrying out the clustering of the gray level co-occurrence matrixes in all directions, and obtaining a plurality of clusters; acquiring positions of pixel points in the gray level image corresponding to each cluster to construct a scatter diagram, acquiring a local area according to a preset radius of the pixel points so as to calculate an outlier index and an abnormal possibility of each pixel point in the scatter diagram, marking the pixel points as abnormal points when the abnormal possibility is greater than an abnormal threshold value, acquiring a connected domain formed by all the abnormal points, and performing clustering on the connected domain; and obtaining an abnormal area in the gray level image, and evaluating the copper-aluminum welding quality of the abnormal area in the welding image. According to the method, the abnormal textures in the welding area can be accurately recognized through construction of the gray-level co-occurrence matrix and clustering analysis, and the detection precision of the welding quality is improved.

An aluminum mullion and method for creation by an extrusion and castellation process for use in a construction section. The aluminum mullion may comprise a first end, a second end having a guide track; a height, and a mullion body positioned between the first end and the second end. The aluminum mullion may be extruded by pushing semi-molten aluminum through a steel die under high pressure to create a monolithic beam shape and then at least one portion of the mullion body is removed by the castellation process. Multiple portions of the mullion body may be removed along the height of the mullion as needed for construction requirements.

The invention provides a solid target system for simultaneously producing Ge-68 and PET nuclides under a high-power beam, and the system comprises an intermediate-energy cyclotron which is used for transmitting an intermediate-energy high-intensity proton beam; the cascade target is arranged beside the intermediate-energy cyclotron and comprises a shell, and a first aluminum target body, a second aluminum target body, a Ga4Ni alloy capsule target and a metal sealing target which are sequentially arranged along the emission direction of the intermediate-energy high-current proton beam, and the shell is filled with cooling water; the target film is erected between the intermediate energy cyclotron and the first aluminum target body; the helium cooling unit is erected between the target film and the first aluminum target body; and the control unit is used for controlling to start the helium cooling unit and the medium-energy cyclotron, so that the medium-energy high-intensity proton beam sequentially passes through the target film, the first aluminum target body, the shell and the cooling water, then enters the Ga4Ni alloy capsule target to produce Ge-68 nuclide, and then enters the metal sealing target to produce PET nuclide. The method has the beneficial effects that the melting of the target material can be reduced, the probability of direct chemical reaction of molten Ga and Nb is reduced, and the types of nuclide production are increased.

The invention discloses a large-size high-strength 2195 aluminum-lithium alloy forged ring and a preparation method thereof. The preparation method comprises the following steps: selecting a cast ingot with the size ratio of height to diameter of 3.5-4.2 as a forged ring raw material; a forging ring raw material is heated and subjected to heat preservation, upsetting and drawing-out are conducted on the forging ring raw material once in three directions on pressure equipment, double-drum rounding is conducted after each time of upsetting, four-direction pressing and eight-direction reversing are conducted after drawing-out, finally one time of axial upsetting is conducted, and punching is conducted after the last time of axial upsetting; broaching the forged ring raw material after punching, and performing radial ring rolling to obtain a ring blank; heating the ring blank, and immediately immersing the ring blank in water after heating; after solution treatment, axial cold pressing and radial cold bulging are carried out, the radial cold bulging is divided into three stages, the ring blank is rotated by a certain angle along a ring mandrel after radial cold bulging in each stage, and uniform deformation is guaranteed; the method has the advantages that anisotropy is reduced, the residual stress of the forged ring is small, and the percent of pass is high.

The invention relates to the technical field of aluminum-based thin film preparation, and discloses an aluminum-based thin film uniform deposition system based on magnetron sputtering. The system comprises a substrate state detection module, a magnetic field dynamic regulation and control module, a sputtering power regulation module, a deposition process monitoring module and a central control terminal. The substrate state detection module collects and transmits surface flatness data of the substrate in real time, and the central control terminal carries out visual display. The magnetic field dynamic regulation and control module obtains magnetic field intensity correction through a magnetic field gradient algorithm according to the deviation value of the real-time flatness parameter and the standard parameter and sends the magnetic field intensity correction to the sputtering power regulation module. And the sputtering power adjusting module adjusts the sputtering rate of the target material accordingly. The deposition process monitoring module tracks the adjusting process, evaluates the dynamic response performance, generates a stable or fluctuation signal and sends the stable or fluctuation signal to the central control terminal, and the central control terminal triggers sound-light alarm when receiving the fluctuation signal. The system can improve the deposition uniformity and process stability of the aluminum-based thin film.

The invention belongs to the technical field of superconducting material processing, and discloses a preparation method of a copper-clad aluminum slot wire WIC superconducting wire, and the method comprises the steps: obtaining a to-be-processed workpiece which comprises a copper-clad aluminum rod and a copper matrix round wire; the copper-clad aluminum rod is sequentially subjected to drawing, annealing, rolling and forming, and the copper-clad aluminum groove wire is prepared; the copper-clad aluminum slot wire and the copper matrix round wire are respectively cleaned and coated with a soldering flux, and then are simultaneously immersed into a tin bath filled with tin liquor to be matched with an inlaying mold to carry out inlaying welding for at least 1000m, so that the copper-clad aluminum slot wire WIC wire is obtained; and surface layer and deep layer welding defect characterization is carried out on the obtained copper-clad aluminum slot wire WIC, and it is ensured that the number of the surface layer and the number of the deep layer welding defects of the copper-clad aluminum slot wire WIC are both zero. According to the method, inlay welding is carried out in the mode that copper-clad aluminum is matched with dip soldering, and the problems that in the traditional technology, the labor cost is high, the welding quality is not stable, and the productivity is insufficient can be solved at the same time.

The invention provides an anti-corrosion ceramic sagger and a preparation method thereof.The anti-corrosion ceramic sagger comprises an aggregate layer and a matrix layer, and the aggregate layer is prepared from, by mass, 30-50 parts of yttrium-stabilized zirconia, 20-30 parts of silicon carbide and 15-25 parts of magnesium aluminate spinel; the matrix layer is prepared from the following raw materials in parts by mass: 40 to 50 parts of mullite micro powder, 30 to 40 parts of cordierite micro powder and 10 to 20 parts of binding agent. According to the anti-corrosion ceramic sagger and the preparation method thereof, by optimizing the raw material ratio and the preparation process, the corrosion depth is smaller than or equal to 0.19 mm after the sagger is soaked in the molten salt environment at 900 DEG C for 72 h, the service life is prolonged by 6-8 times compared with that of a traditional corundum sagger, and the anti-corrosion ceramic sagger has wide application prospects.

The invention relates to the technical field of high-purity quartz sand preparation, in particular to a process for producing high-purity quartz sand from quartz ore with high iron and aluminum content, which comprises the processes of coarse crushing, screening, acid leaching, roasting and water quenching, fine crushing, screening, magnetic separation, acid scrubbing, flotation, acid pickling, chlorination purification, magnetic separation and the like. And metal impurities and non-metal impurities in the ore are systematically removed. And through rough crushing and screening, ore with high impurity content is screened out in advance, and interference of impurities to subsequent procedures is reduced. And it is ensured that in the subsequent fine crushing and flotation process, the content of impurities in the quartz ore is small, it is avoided that due to excessive impurities, the subsequent treatment difficulty is increased, and the production efficiency is improved. And then the links of acid leaching, roasting water quenching, flotation, acid pickling, chlorination purification and the like are carried out, so that common impurities in the ore can be effectively removed. Through multiple acid treatment and high-temperature chlorination purification, it is ensured that impurities are converted into volatile compounds and thoroughly removed, and the purity of the quartz sand is remarkably improved.

The invention provides a low-temperature fast-fired ceramic green body, a high-strength ceramic tile and a preparation method of the high-strength ceramic tile. The ceramic green body is prepared from the following raw materials in parts by weight: 8-15 parts of ball clay, 1-8 parts of bentonite, 1-8 parts of black talc, 60-70 parts of vanadium-titanium slag, 8-15 parts of kaolin and 0.3-0.5 part of a green body dispergator. According to the invention, a large amount of vanadium-titanium slag is introduced into a ceramic blank formula, so that barren raw materials in the blank can be completely replaced, exhaustion of mineral resources is slowed down, the utilization rate of the vanadium-titanium slag is greatly improved, resource waste is avoided, and a low-aluminum blank formula system enhanced by metal oxide is formed; the sintering temperature of the green body can be greatly reduced, the water absorption rate of the product is reduced, the sintering period is shortened, and a low-temperature fast-firing ceramic production process is realized.

The invention discloses a tailor-welding method for 1500Mpa grade aluminum-silicon coating hot forming steel, which comprises the following steps of: splicing plate materials to be welded together, and fixing through a tool clamp; under the protective atmosphere, welding wires are fed into the splicing gaps of the to-be-welded plate materials in a front wire feeding mode, and laser tailored blank welding is conducted through a laser; in the laser tailored blank laser welding process of the laser device, a laser beam advances along a welding seam in a swinging mode, and the swinging mode is circular, infinite, linear, sinusoidal, equilateral triangle, oval or rhombic circulating swinging. And carrying out heat treatment on the welded plate and then quenching. In the laser filler wire tailor-welding process, different forms of laser stirring paths and different welding process parameters are set, the liquidity of a molten pool is effectively improved, the mixing effect of metal liquid is enhanced, and components and organizations of a welding seam are distributed more evenly; meanwhile, formation of welding air holes is reduced, crack sensitivity is reduced, and the quality and performance of a welded joint are improved.

The invention belongs to the technical field of architectural ceramics, and particularly discloses radiation refrigeration glaze, a preparation method thereof and a lightweight ceramic tile. The radiation refrigeration glaze comprises a basic glaze and radiation refrigeration powder, the radiation refrigeration powder comprises nano-porous alumina and metallic oxide doped magnesium aluminate spinel, and the metallic oxide is selected from at least one of iron sesquioxide, manganese dioxide, cobalt sesquioxide and copper oxide. According to the invention, nano-porous alumina and metallic oxide doped magnesium aluminate spinel are compounded as radiation refrigeration powder, and the radiation refrigeration powder is added into the cover glaze of the light ceramic tile, so that not only are good glaze quality and tile shape obtained, but also the sunlight reflectivity ratio of the glaze is improved, thereby achieving a good radiation refrigeration effect, and improving the service life of the light ceramic tile. The sunlight reflectivity reaches up to 88-94%, the glaze quality and the brick shape are good, and the surface flatness is + / -0.3 mm.

The invention relates to a modified chrome corundum ramming material and a preparation and construction process thereof, and belongs to the technical field of chrome corundum ramming materials. The ramming material comprises a material A, a material B and a material C, wherein the material A comprises chrome corundum aggregate, titanium dioxide coated aluminum oxide microspheres, calcium sulfide dehydrate and silicon carbide porous microspheres; the material B comprises chromium oxide-zirconium oxide composite nano powder, sodium thiosulfate pentahydrate, tricalcium phosphate and hexagonal boron nitride flaky crystals; and the material C comprises an aluminum dihydrogen phosphate-magnesium hydroxide compound, a calcium fluoride-aluminum oxide co-melt and a silane coupling agent. The preparation process comprises the steps of pretreatment of all the components, preparation of composite powder and layered preparation. The construction process comprises the steps of pretreatment, wet-process mixing, layered ramming, negative-pressure permeation, medium-temperature reaction, spraying curing, integral firing and the like. Generation of hexavalent chromium can be effectively inhibited, the thermal shock resistance, the mechanical strength and the heat-conducting property of the material are remarkably improved, and the material has the advantages of being good in environment friendliness, long in service life, excellent in construction performance and the like.

The invention relates to a purification device and a high-purity aluminum purification method using the purification device. The purification device comprises a smelting chamber shell, a smelting chamber inner cavity, a smelting container arranged at the bottom of the smelting chamber inner cavity, a magnetic field module and a directional solidification module, wherein the magnetic field module and the directional solidification module are arranged in the gap position between the smelting chamber shell and the smelting chamber inner cavity. The magnetic field module comprises a first magnetic field and a second magnetic field; the first magnetic field comprises a centrifugal magnetic field area arranged on the periphery of the side wall of an inner cavity of the smelting chamber. The second magnetic field comprises axial magnetic field areas symmetrically arranged between the top of the inner cavity of the smelting chamber and the bottom of the inner cavity of the smelting chamber; the directional solidification module comprises a cooling part arranged at the bottom of the smelting container and a heating part arranged along the peripheral side of the top of the smelting chamber shell; according to the purification device and the purification method using the purification device, the removal rate of heavy impurities is preferably as high as 85% or above, the removal rate of light impurities is preferably as high as 75% or above, and continuous production of 6N high-purity aluminum is achieved.

The present disclosure discloses a multilayer annular pore nickel-cobalt-aluminum precursor and a preparation method and a positive electrode material thereof. The precursor D50 is 8 to 20 μm. It may be seen from a section diagram that there is a plurality of layers of annular pores in a secondary spherical particle structure, and a average porosity value of the section with a single particle or a plurality of particles is 6% to 14%. A co-precipitation reaction of nickel-cobalt mixed salt solution, alkali-aluminum solution, a complexing agent, and a precipitating agent is performed, a pH value and a concentration of aluminum solution at each stage are strictly controlled, and then working procedures of solid-liquid separating, washing, drying, mixing, sieving, and demagnetizing are performed to obtain the multilayer annular pore nickel-cobalt-aluminum precursor.

A thermal module structure includes an aluminum base having an upper and a lower surface, at least one L-shaped copper heat pipe, a first aluminum fin assembly, a second aluminum fin assembly, and at least one copper embedding layer. The copper heat pipe includes a heat absorption section fitted on the aluminum base, and a heat dissipation section connected to the second aluminum fin assembly. The copper embedding layers are provided on the aluminum base at areas corresponding to the first aluminum fin assembly and the heat absorption section of the copper heat pipe, and on a bottom surface of the first aluminum fin assembly that is to be connected to the aluminum base. Thus, the first aluminum fin assembly and the copper heat pipe can be directly welded to the aluminum base via the copper embedding layers without the need of electroless nickel plating.

The invention discloses a method for evaluating the mineralization potential of porphyry copper-(gold-molybdenum) ore. The evaluation method comprises the following steps: determining candidate rock masses with relatively high mineralization potential according to an oxygen fugacity value of magma zircon and / or a magma water content value of hornblende in a rock sample in an evaluation area; the aluminum saturation index ASI of the candidate rock mass is measured and calculated, the distribution coefficient and the distribution coefficient ratio of Cu, Au and Mo between fluid and melt are determined according to the ASI, simulation calculation is conducted through a Rayleigh fractionation model according to the distribution coefficient and / or the distribution coefficient ratio, and the content ratio of Au to Cu to Mo to Cu of the candidate ore body is obtained. According to the method, the mineralization potential of the porphyry copper ore and the enrichment degree and grade of Cu, Au and Mo of potential ore bodies can be rapidly and accurately evaluated.

The invention belongs to the technical field of desiliconized fly ash, and particularly relates to a high-alumina-silica-ratio material capable of replacing bauxite as well as a preparation method and application of the high-alumina-silica-ratio material. The preparation method comprises the following steps: S1, crushing coal gangue, and grinding the crushed coal gangue until the particle size is less than 40 meshes to obtain a ground material; s2, mixing the ground material and a catalyst according to a weight ratio of 100: (1-2), roasting, and cooling to obtain activated coal gangue; the catalyst comprises sodium carbonate, calcium oxide and aluminum oxide in a weight ratio of 1: (0.3-0.5): (1.4-1.6); s3, mixing a sodium hydroxide solution, the activated coal gangue and a surfactant, and reacting at 50-90 DEG C for 1-6 hours to obtain desiliconized slurry; and S4, filtering the desiliconized slurry, collecting a solid phase, washing with water, and drying to obtain desiliconized fly ash, namely the high alumina-silica ratio material capable of replacing bauxite. The method is high in desiliconization rate.

A steel sheet has a chemical composition including in wt % C: 0.2-0.4%, Mn: 0.8-2.0%, Si: 0.1-0.5%, Al: 0.01-0.1%, Ti: 0.01-0.1%, B: 0.0005-0.005%, P≤0.040%, Ca≤0.01%, S≤0.006%, N≤0.01%. The steel sheet includes from the bulk to the surface of the coated steel sheet a bulk and a skin layer occupying the outermost 10% of the thickness on either side of the bulk. The bulk includes an inclusion population in which the sum of clustering indexes of MnS and TiN / Ti(C,N) inclusions is less than or equal to 300 μm / mm2. This allows to manufacture hot pressed parts having a tensile strength equal to or greater than 1300 MPa and a bending anisotropy equal to or lower than 7°.

A method of adsorption includes contacting a nanocomposite with a solution including one or more pollutants. The nanocomposite is a graphite-phase carbon nitride copper oxide and magnesium aluminum oxide (g-C3N4@CuO / MgAl2O4) material and includes a graphite-phase carbon nitride (g-C3N4) in an amount of 5 to 15 percent by weight (wt. %), copper oxide in an amount of 3 to 7 wt. %, and magnesium aluminum oxide (MgAl2O4) in an amount of 80 to 90 wt. % based on a total weight of the g-C3N4@CuO / MgAl2O4 material. The method further includes adsorbing the one or more pollutants on the nanocomposite.

The invention relates to a slag performance regulation and control method for large-proportion collaborative smelting of multi-source lead-based solid waste in flash lead smelting, belongs to the technical field of non-ferrous metal smelting, and mainly solves the problem of collaborative regulation and control of the viscosity performance of slag by factors such as ZnO content, Al2O3 content, CaO / SiO2 mass ratio, alkalinity and the like of FeOx-CaO-SiO2-ZnO-PbO-Al2O3 system slag so as to realize low-carbon and safe smooth smelting. The method comprises the following steps: (1) reasonably controlling the contents of elements such as Zn and Al in a mixed material fed into a furnace and the addition amount of a CaO flux and a SiO2 flux, and starting smelting; (2) in the flash smelting process, the content of ZnO in the slag is controlled to be lower than 25 wt%, the content of Al2O3 in the slag is controlled to be lower than 6 wt%, the mass ratio interval of CaO / SiO2 is 0.30-0.50, the alkalinity interval is 1.8-2.3, and flash smelting and slag-lead separation are completed; and (3) normally discharging slag and lead. According to the method, in the production practice of flash lead smelting, the problem that slag and lead are difficult to separate due to collaborative smelting of large-proportion and multiple types of high-zinc and high-aluminum solid wastes can be solved, the safe, energy-saving and efficient lead smelting process is guaranteed, and the production capacity of the flash lead smelting furnace for treating the multi-source lead-based solid wastes is improved.

The invention provides a coating for casting an alloy steel lost foam as well as a preparation method and application of the coating. The coating comprises the following raw materials in parts by weight: 79-89 parts of aggregate, 3-7 parts of a binder, 4-7 parts of a suspending agent, 1.5-3 parts of a surfactant, 1.5-2.5 parts of a defoaming agent and 1-1.5 parts of a preservative, the aggregate is prepared from the following components in percentage by mass: 78 to 82 weight percent of bauxite, 12 to 15 weight percent of mica and 3 to 10 weight percent of quartz powder; the binder is prepared from the following components in percentage by mass: 42 to 50 weight percent of anhydrous aluminum dihydrogen phosphate, 18 to 25 weight percent of white carbon black, 12 to 17 weight percent of ethylene glycol and 8 to 28 weight percent of magnesium oxide; the coating for casting the alloy steel evanescent mode keeps good suspension property, high-temperature air permeability, coating property, high-temperature crack resistance and shedding property of the coating, the surface of a casting is smooth and free of burnt-on sand, less harmful gas is volatilized during firing, and harmful gas generated by burning of a white mold can be absorbed.

The invention belongs to the technical field of aluminum plate machining, and particularly relates to an aluminum plate longitudinal cutting device which comprises a supporting table, and a discharging roller and a collecting roller are arranged at the top of the supporting table. By arranging the induction coil, the first permanent magnet, the second permanent magnet and the electromagnetic heating plate, the aluminum plate which is not longitudinally cut is heated, the hardness and brittleness of the aluminum plate can be reduced, longitudinal cutting is smoother, the quality of finished products is improved, deformation of the aluminum plate is reduced during longitudinal cutting, and the cutting precision and stability are ensured; by arranging a fixing plate, a shaking plate, piezoelectric ceramic pieces, springs and the like, the two piezoelectric ceramic pieces are placed in a cutting gap of an aluminum plate, when a longitudinal cutter is abraded, the cutting gap can be enlarged, the shaking amplitude of the piezoelectric ceramic pieces in the cutting gap is increased under pushing of the first spring, output current is increased, and the cutting effect of the aluminum plate is improved. And the state of the longitudinal cutter can be conveniently monitored in real time for subsequent detection operation.

The invention provides a pretreatment method for smelting separation of ionic rare earth ore, which comprises the following steps of: crushing rare earth enrichment, performing size mixing, performing acid dissolution, and then performing first solid-liquid separation to obtain first filter residue and pickle liquor; mixing and reacting the obtained pickle liquor with magnesium oxide slurry, and then carrying out second solid-liquid separation to obtain second filter residues and rare earth feed liquid; and extracting or precipitating the obtained rare earth feed liquid to obtain a rare earth carbonate product. According to the method, the rare earth enrichment is pretreated to separate and extract rare earth elements, the rare earth recovery rate reaches 97.3% or above, the rare earth loss is small, the obtained product can be directly used for smelting separation of rare earth products, the efficiency of the whole process for mining and utilizing the ionic rare earth ore is improved, and the economic benefit is increased. Meanwhile, magnesium and aluminum impurity elements are subjected to resource utilization and solid waste residue reduction, the process cost is reduced, and the economy of rare earth ore development is improved.

The invention relates to the technical field of heavy metal wastewater treatment, and discloses a preparation method of porous calcium-aluminum hydrotalcite and application of the porous calcium-aluminum hydrotalcite in wastewater lead removal. According to the specific scheme, an ionic liquid aqueous solution is used as a reaction solvent and a template agent, aluminum, calcium and sodium compounds are used as solutes, the porous aluminum-calcium hydrotalcite with uniform pore diameter and high adsorption capacity is synthesized, and the lead removal rate of the porous calcium-aluminum hydrotalcite can reach 98% or above. Compared with a traditional mode, the adopted preparation method is higher in efficiency, industrialization development of the porous material is facilitated, and a more excellent material can be provided for heavy metal removal.

The invention relates to the technical field of high-chromium and high-molybdenum ferritic stainless steel, in particular to a preparation method of a high-chromium and high-molybdenum aluminum-containing ferritic stainless steel hot / cold-rolled plate. In order to solve the problems that in the prior art, in order to avoid brittle phase precipitation, the hot rolling and finish rolling temperature is high, and aluminum oxide particles and large-size carbon / nitride particles are likely to be formed, the novel preparation method of the high-chromium and high-molybdenum aluminum-containing ferrite stainless steel hot / cold-rolled sheet is provided. Comprising the following steps of smelting, casting, forging, hot rolling, annealing, acid pickling, cold rolling and recrystallization annealing, and through the forging process in the preparation method, large-size TiN and Ti / Nb (C, N) particles can be prevented from being formed; through the warm rolling process, a nanoscale Laves phase is separated out, meanwhile, a large deformation structure is formed, a large number of deformation microstructures such as shear bands and deformation bands are obtained, the problem of grain coarsening is solved, and the plasticity, toughness and corrosion resistance of the material are improved.

The invention relates to the technical field of quality detection, and provides an aluminum product quality multi-scale detection method and system, and the method achieves the comprehensive detection and analysis of the multi-scale features of an aluminum product from the surface to the interior through the construction of a closed-loop detection system from data acquisition, feature association to feedback adjustment. According to the method, the defect mode of the aluminum product can be accurately identified, the defect reason can be accurately positioned, and the process parameters are effectively adjusted based on the defect mode, so that the quality of the aluminum product is remarkably improved, the production efficiency is improved, the production cost is reduced, the market competitiveness of the product is enhanced, and an innovative and efficient solution is provided for quality control in the aluminum product production process.

The invention relates to the technical field of automatic welding, in particular to an automatic welding control method and system for an aluminum-based wiring terminal, and the method comprises the steps: enabling a welding parameter to change from an initial welding parameter to A1 by utilizing a PID control algorithm; according to the change sensitivity of each controlled variable, the time interval of each controlled variable is obtained, and temporary welding parameters are screened out from the historical welding parameters; and after the PID control algorithm sequentially changes all the control quantities according to the time interval, a target welding parameter A2 is obtained according to the temporary welding parameters and the change sensitivity of the control quantities in the temporary welding parameters, the PID control algorithm is used for changing the welding parameters, so that the welding parameters are changed from A1 to A2, and the like, and the current welding process is completed. According to the method, the welding process is controlled relatively accurately and reliably, and the welding process at some moments before is prevented from severely influencing the subsequent welding process.

This water electrolysis electrode comprises a substrate and a catalyst portion. The catalyst portion includes Raney nickel particles and metal particles that contain nickel as a main component. The metal particles are in contact with the Raney nickel particles and include aluminum. The ratio of the total number of moles of aluminum to the total number of moles of nickel in the Raney nickel particles is greater than the ratio of the total number of moles of aluminum to the total number of moles of nickel in the metal particles.

The invention belongs to the technical field of filling of an aluminum goaf under coal, and particularly relates to a bag type filling synergistic mineralization carbon dioxide sequestration method for mining a red mud-based filling material based on an aluminum strip under coal. Comprising the following steps that S1, filling bags are arranged; s2, grouting the aluminum layer bottom plate; s3, CO2 is conveyed; s4, red mud slurry is injected; s5, grouting between coal and aluminum layers; according to the method, through aluminum layer bottom plate grouting and coal aluminum interlayer grouting, Ordovician limestone water is effectively prevented from protruding out, harmful substances are effectively prevented from permeating underground water, meanwhile, a sealing cover layer for CO2 injection is also used, and the mineralization amount of CO2 is effectively increased. The main components of the red mud slurry are red mud, fly ash and crushed coal gangue, solid waste accumulation and environmental pollution are effectively reduced while the filling cost is remarkably reduced, recycling is achieved, the red mud is sealed in a flexible filling bag in a goaf, and if necessary, valuable elements in the red mud can be used for filling the goaf. And the tea leaves can also be extracted.

The invention relates to the technical field of ultralow-sulfur peritectic steel smelting, and particularly discloses a method for producing an ultralow-sulfur peritectic steel continuous casting round billet through a full-scrap-steel electric arc furnace. According to the method for producing the ultra-low-sulfur peritectic steel continuous casting round billet through the full-scrap steel electric arc furnace, the corresponding conditions of burdening, electric arc furnace smelting, molten steel slagging and deoxidizing, LF refining, VD vacuum smelting and peritectic steel round billet continuous casting are controlled, a specific amount of low-sulfur scrap steel is selected, and the oxygen supply strength in the electric arc furnace smelting process is limited; the carbon content during tapping of an electric arc furnace is guaranteed in a carbon spraying mode, the adding opportunity of aluminum ingots, premelting refining slag, fluorite, lime and aluminum wires is limited in the molten steel slagging and deoxidizing process, the aluminum content of molten steel during LF refining is controlled, the top slag content of VD vacuum smelting is limited, a high-alkalinity low-sulfur carbon-free covering agent is added in the initial continuous casting stage of peritectic steel round billets, and the high-alkalinity low-sulfur carbon-free covering agent is added. The ultra-low-sulfur peritectic steel continuous casting round billet with excellent comprehensive performance is prepared, the surface is free of sunken and crack defects, and the defect rate is basically zero.