560 results about "Ferrous metallurgy" patented technology

The utility model relates to the field of ferrous metallurgy, in particular to a contact type device for measuring the surface temperature of a continuous casting billet, which comprises two bottom plates, stabilizing frames are arranged on the outer walls of the tops of the bottom plates, supporting frames are arranged on the outer walls of the tops of the bottom plates, and lifting screw rods are rotatably connected between the inner walls of the supporting frames and the bottom plates. The outer wall of the lifting screw is in threaded connection with an adjusting structure, and a contact assembly is arranged at the top of the adjusting structure. The adjusting structure comprises a mounting frame, an adjusting groove formed in the center of one end of the outer wall of the top of the mounting frame, and an adjusting screw rotationally connected into the adjusting groove. The contact assembly comprises a telescopic pipe and a sliding protrusion welded to one end of the outer wall of the bottom of the telescopic pipe. The lifting screw rod rotates to drive the mounting frame to move up and down in the supporting frame, the adjusting screw rod drives the telescopic pipe to move left and right on the outer wall of the mounting frame, adjustment is convenient, the temperature detection position is convenient to adjust, and the temperature detection accuracy is guaranteed.

The invention belongs to the technical field of ferrous metallurgy, and particularly relates to a steel billet surface defect detection method which comprises the following steps: controlling the moving speed of a roller way to be synchronous with the reaction rate of flame cleaning, and performing continuous scanning type cleaning and removal on an oxide layer on the surface of a steel billet through a flame cleaning device; the flame cleaning device comprises a flame nozzle and an air source; and then the surface of the steel billet is detected after flame cleaning, surface defects are recognized, and the defects comprise cracks and air holes. The flame cleaning device is adopted to remove the oxide layer on the surface of the steel billet, so that the surface of the steel billet can be quickly and effectively cleaned, tedious pretreatment processes such as acid pickling and shot blasting are avoided, expensive chemicals and shot blasting equipment are avoided, the chemical treatment and equipment maintenance cost is saved, and the production cost is remarkably reduced. The speed and efficiency of billet surface defect detection are greatly improved, and the dead time and manual intervention of a production line are reduced.

The invention relates to the technical field of ferrous metallurgy, and discloses a non-deslagging converter steelmaking method which comprises the following steps: step 1, establishing a slag-steel interface stability analysis model, and analyzing the stability of a slag and molten steel interface under the action of a gravity field, oxygen blowing gas flow and temperature gradient, including slag density, molten steel density, interfacial tension and oxygen blowing flow rate, so as to obtain a slag-steel interface stability analysis model; calculating the amplitude and wavelength of an interface; and 2, based on the interface disturbance physical parameters obtained in the step 1, optimizing oxygen blowing process parameters of the top-blowing spray gun, adjusting the oxygen blowing angle of the spray gun to be in the range of 15-25 degrees, and controlling the oxygen flow rate to be in the range of 600-700 Nm < 3 > / h. By establishing a slag steel interface stability analysis model and adopting a multi-field coupling theory of a gravity field, an oxygen blowing gas flow and a temperature gradient, the amplitude, the wavelength and the disturbance growth rate of interface disturbance are quantitatively analyzed, accurate prediction and optimal control of dynamic behaviors of the slag steel interface are achieved, and the effect that the interface is kept stable in the steelmaking process is achieved.

The invention relates to a molten steel slag centrifugal granulation treatment and waste heat recovery system which is characterized in that a slag inlet is formed in the top of a centrifugal granulation bin, a rotating disc and a rotation driving motor are arranged in the centrifugal granulation bin, the rotating disc is arranged below the slag inlet, and the rotating disc is driven by the rotation driving motor; the low-melting-point eutectic metal self-flowing bed waste heat boiler is arranged below the centrifugal granulation bin, a self-flowing bed waste heat boiler heat exchange pipe is arranged in the low-melting-point eutectic metal self-flowing bed waste heat boiler, and low-melting-point eutectic metal is loaded in the self-flowing bed waste heat boiler heat exchange pipe. High-grade waste heat recovery of the high-temperature molten steel slag is achieved, the blank of heat energy recovery of a steel mill is filled up, and energy conservation, emission reduction and carbon reduction of the steel mill are greatly promoted. The two links of centrifugal granulation treatment and waste heat recovery are comprehensively and integrally designed, the structure is simpler and more compact, the efficiency is higher, operation is easy and convenient, the production implementation process is safe, and the device can be applied and popularized in ferrous metallurgy enterprises.

The invention relates to the technical field of non-ferrous metallurgy, and discloses a dissolution method of high-iron-monohydrate-boehmite type bauxite. The method comprises the following steps: (1) preparing mixed ore pulp from high-iron monohydrate bauxite, sodium aluminate circulating mother liquor and an additive; the additive is one or a mixture of more of organic alkali, carboxylic acid and amino acid; (2) the mixed ore pulp is subjected to ultrasonic treatment and then heated to 190-280 DEG C for a dissolution reaction, dissolution slurry and dissolution residues are obtained, the dissolution residues are subjected to magnetic separation and recovery, and iron ore concentrate is obtained; the power of the ultrasonic treatment is 200 to 300W, and the time of the ultrasonic treatment is 30 to 50 minutes. According to the method, the problem that iron minerals are difficult to separate due to silicon minerals in the dissolution process of the high-iron monohydrate bauxite is solved. The method is simple in process, low in production cost, low in equipment requirement and good in industrialization prospect.

The invention provides a refining method for increasing nitrogen in the vacuum process of a VD vacuum furnace, and relates to the technical field of ferrous metallurgy, the refining method comprises the following steps: S1, refining molten steel in an LF steel ladle by adopting nitrogen as bottom blowing gas; and S2, the molten steel obtained after LF ladle refining is placed in a VD vacuum furnace, nitrogen serves as bottom blowing gas, the nitrogen flow and the vacuum degree are adjusted in a multi-stage mode, and the nitrogen increasing operation is completed. A multi-stage adjustment mode is adopted, and the nitrogen content in the molten steel is controlled by controlling the nitrogen flow, the vacuum degree and the retention time.

The invention discloses a steel ladle tipping transport vehicle and a hot repair method, and belongs to the technical field of continuous casting of ferrous metallurgy. The steel ladle tipping transport vehicle comprises a vehicle body, a tipping saddle and a rotating arm oil cylinder, the front part of the tipping saddle is hinged to the vehicle body, so that the tipping saddle is convenient to overturn; the output end of the rotating arm oil cylinder is hinged to the middle of the tipping saddle to provide tipping force. The tipping saddle is provided with a clamping groove with an upward notch, and the notch is matched with steel ladle seats on the two sides of the steel ladle in shape, so that the tipping saddle and the steel ladle seats are clamped conveniently. In the specific use process, the clamping groove is connected with the steel ladle base in a clamped mode, the tipping saddle stably bears the steel ladle and drives the steel ladle to synchronously transport and roll over, the tumbler oil cylinder enables the steel ladle to roll over, the vehicle body bears the steel ladle to move between the hot repair station and the molten steel receiving span, transportation and hot repair operation of the steel ladle on the vehicle body are achieved, safety and reliability are achieved, use of a crown block is reduced, and working efficiency is improved. The technical problems that the molten steel receiving span temperature is high, the working environment is poor, the hoisting travel is long and the safety is low during hot repair of an existing steel ladle are solved.

The invention relates to a method for improving the liquid level calculation accuracy of a converter secondary model molten pool, and belongs to the technical field of ferrous metallurgy control methods. According to the technical scheme, before blowing is started, the liquid level height of a converter molten pool is calculated; after blowing is finished, a sublance TSO probe is adopted for measuring the liquid level height, and after data are uploaded, the secondary model conducts terminal point molten pool liquid level height data correction; calculating a difference value between the molten steel liquid level height at the blowing end point and the molten steel liquid level height at the model calculation end point, and performing model calculation updating in a normal range; if a normal range is exceeded, considering an abnormal factor, and not carrying out model feedback updating. The method has the beneficial effects that automatic steelmaking control fluctuation caused by molten pool liquid level fluctuation can be reduced, the method can be applied to the steelmaking process on a large scale, operation is easy and convenient, and the effect is stable; the molten pool liquid level calculation accuracy of the converter secondary steelmaking model can be effectively improved, the automatic steelmaking rate is effectively improved, and the product quality and the social and economic benefits are improved.

The invention belongs to the technical field of ferrous metallurgy, and relates to high-grade hydrogen transmission pipeline steel and a preparation method thereof.The high-grade hydrogen transmission pipeline steel is prepared from, by mass, 0.02%-0.04% of C, 0.20%-0.30% of Si, 1.20%-1.30% of Mn, smaller than or equal to 0.010% of P, smaller than or equal to 0.0010% of S, 0.015%-0.055% of Alt, smaller than or equal to 0.0020% of N, smaller than or equal to 0.0010% of O, smaller than or equal to 0.0001% of H, 0.90%-1.00% of Cr, 0.40%-0.50% of Mo, 0.020%-0.030% of Ti, 0.05%-0.07% of Nb, 0.40%-0.50% of Ni and the balance iron and inevitable impurities; various performance indexes, especially hydrogen induced crack resistance indexes, of the composite material are outstanding, CSR is equal to 0, CLR is equal to 0, CTR is equal to 0, slow tensile IRA and IEL are smaller than or equal to 20% in a solution A, KIH of a stepped compact tensile sample is larger than or equal to 100 MPa.m < 1 / 2 > in a 6.3 MPa pure hydrogen environment, and the fatigue life is larger than or equal to 500,000 times; according to the method, the technical problems in the research and development process of the steel material for the hydrogen conveying pipeline are solved, the technical scheme is relatively simple and easy to implement, the obtained product is high in performance stability and controllable in cost, and popularization and application in long-distance, large-scale and safe conveying pipeline construction of high-pressure hydrogen are facilitated.

The invention relates to the technical field of ferrous metallurgy, in particular to a production and manufacturing method of a low-cost high-elongation 600MPa-grade steel plate, which is characterized in that raw materials comprise the following chemical components in percentage by weight: 0.111 to 0.173 percent of C, 0.13 to 0.43 percent of Si, 1.325 to 1.565 percent of Mn, less than or equal to 0.018 percent of P, less than or equal to 0.008 percent of S, 0.020 to 0.060 percent of Alt, 0.0225 to 0.0435 percent of Nb, less than or equal to 0.0070 percent of N and the balance of Fe; the manufacturing method comprises the following steps of top-bottom combined blown converter, LF refining, VD vacuum refining, slab continuous casting, two-stage controlled rolling and subsection cooling.

The invention provides a method for measuring the width of a casting blank by an industrial CCD (Charge Coupled Device) based on AI (Artificial Intelligence), belongs to the technical field of casting blank width measurement, can overcome the problems of low measurement precision, easiness in environmental influence and the like in the prior art by combining an industrial CCD measurement technology with an AI model, and provides a casting blank width measurement method which is more accurate and stable. According to the method, the accuracy and efficiency of measurement can be improved, the dependence of manual operation can be reduced, and the error rate is reduced, so that the requirement of the ferrous metallurgy industry on high-precision measurement is met. In addition, the method is also suitable for other industrial fields requiring high-precision measurement, and has a wide application prospect.

The invention discloses a smelting process for regulating and controlling C-class and D-class inclusions of heavy rail steel through magnesium treatment, and belongs to the technical field of ferrous metallurgy. Smelting is carried out according to given components and a production process, the smelting process comprises the steps of converter smelting, LF refining, VD vacuum treatment, magnesium treatment and continuous casting, and the generation type and distribution of inclusions in the heavy rail steel are accurately regulated and controlled mainly by adding a proper amount of magnesium-containing cored wires in the last stage of smelting. Most inclusions in the heavy rail steel exist in the form of fine dispersed calcium-silicon-magnesium-aluminum-oxygen composite inclusions. According to the smelting process, large-size C-class and D-class inclusions with the size larger than 10 micrometers can be eliminated, intragranular acicular ferrite can be induced to be formed in the solidification process, grains are refined, the performance is improved, and the performance and quality of the heavy rail steel are improved.

The utility model discloses a coating roller system for improving the uniformity of a coating on the surface of oriented silicon steel, and relates to the technical field of ferrous metallurgy. Comprising an upper coating roller, a lower coating roller and a lifting device. The upper coating roller and the lower coating roller are the same in shape and size. The two roller necks and the roller are welded to form a cavity structure, and the surface of the roller is an arc-shaped body protruding outwards. And a rubber layer with the thickness of 20-25mm covers the surface of the roller. The rubber hardness of the upper coating roller and the rubber hardness of the lower coating roller are different, the surface of the rubber layer is provided with a miniature notch groove, the notch groove in the surface of the rubber layer is divided into a middle area and an end area, the size of the notch groove in the middle area is large, and the size of the notch groove in the end area is small. The service life of the coating roller is prolonged, and the coating uniformity of the coating roller on the surface of silicon steel is improved.

The invention belongs to the field of ferrous metallurgy, and relates to a rare earth microalloyed plateau weather-resistant high-performance structural steel plate and a preparation method thereof. The steel comprises the following components in percentage by weight: 0.03%-0.05% of C, 0.15%-0.25% of Si, 1.30%-1.60% of Mn, less than or equal to 0.013% of P, less than or equal to 0.005% of S, 0.020%-0.045% of Nb, 0.006%-0.020% of Ti, 0.5%-1.0% of Ni, 0.15%-0.20% of Cr, 0.10%-0.30% of Cu, 0.001%-0.003% of Zr, 0.001%-0.010% of RE and the balance of Fe and inevitable impurities. The preparation method comprises the steps of molten steel converter smelting, RH and LF refining, continuous casting, casting blank heating, rolling and the like. According to the high-performance structural steel plate, ReH is larger than or equal to 420 MPa, Rm is larger than or equal to 525 MPa, the ductility is larger than or equal to 30%, the yield ratio is smaller than or equal to 0.80, the longitudinal impact energy at the temperature of-60 DEG C is larger than or equal to 250 J, the comprehensive mechanical property is excellent, the relative corrosion rate is smaller than or equal to 50% compared with traditional Q355 carbon steel, and the high-performance structural steel plate has the advantages of being resistant to low-temperature freezing and thawing, resistant to corrosion and resistant to environment-sensitive fracture.

The invention belongs to the technical field of ferrous metallurgy, and particularly relates to a molten steel smelting method adopting fluoride-free refining slag in LF (ladle furnace) refining, which comprises the following steps: taking a slag sample from the LF refining slag refined by fluorine-containing refining slag, analyzing the components of the slag sample, calculating the metallurgical properties including melting point and viscosity of the slag sample by using FactSage software, and calculating the content of the fluoride-free refining slag according to the calculation result. The composition of the fluoride-free refining slag system replacing the fluorine-containing refining slag is obtained through phase diagram calculation; obtaining the molten steel oxygen content and temperature at the converter smelting end point, and determining the amount of slag needing to be added according to the molten steel oxygen content and temperature at the converter smelting end point; lime and synthetic refining slag are added in the converter tapping process for slagging to achieve first modification; and in the LF refining process, residual lime and synthetic refining slag are added for slagging to realize secondary modification, a slag system is adjusted to a required fluoride-free refining slag system composition, and LF refining is realized by adopting molten steel of fluoride-free refining slag for smelting.

The invention belongs to the technical field of ferrous metallurgy, and relates to a blowing oxygen lance nozzle for improving the steel scrap ratio of a converter and a blowing process. The main jet flow hole is formed in the bottom, the secondary combustion auxiliary holes are formed in the side wall, the secondary combustion auxiliary holes adopt the diverging pipe design mode, the secondary combustion oxygen flow outlet speed is reduced, interference to main oxygen jet flow caused by too high outlet speed is avoided, the secondary combustion efficiency is enhanced, meanwhile, the main oxygen jet flow is blown in through jetting gas in a rotational flow mode, and the secondary combustion efficiency is improved. The blowing stirring condition is improved, the stirring strength of the molten pool is enhanced, the heat and mass transfer process between the molten pool and the scrap steel is enhanced, the melting speed of the scrap steel is increased, and the uniform mixing time of the molten pool is shortened.

The invention belongs to the field of ferrous metallurgy, and particularly relates to a method for improving the quality of a continuous casting billet through ultrasonic waves. According to the method, a multi-directional focused ultrasonic field and solidification front edge dynamic regulation and control combined mode is adopted, and electromagnetic stirring phase difference control and cooperative control of a secondary cooling section (fan-shaped section) auxiliary ultrasonic vibrator are combined at the same time. Wherein the composite action mode of the longitudinal standing wave field and the transverse traveling wave field of the multidirectional focused ultrasonic wave field and the solidification front edge dynamic regulation and control mode act on the casting blank, so that the equiaxed crystal rate can be remarkably increased, and the combination of ultrasonic waves and electromagnetic stirring is beneficial to reducing the segregation degree of the casting blank; and the addition of nano aluminum oxide and magnesium oxide mixed particles in the casting powder is beneficial to improving sound wave conduction so as to reduce subcutaneous bubbles. The isometric crystal rate of the finally obtained continuous casting billet is increased to 30%-55%; the center segregation index of the finally obtained continuous casting billet is reduced to 1.05 or below; and the number of subcutaneous bubbles per square meter is less than 0.5.

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 invention relates to the technical field of ferrous metallurgy, in particular to a high-strength extremely-low-temperature welding material wire rod and a manufacturing method and application thereof.The manufacturing method comprises the steps that molten steel smelting is conducted according to chemical components and percentages of the high-strength extremely-low-temperature welding material wire rod, a square billet is manufactured in a forging and rolling mode after die casting, the square billet is heated and subjected to heat preservation for 4.5-6 h, and then the square billet is rolled into a first-diameter wire rod; cooling after rolling, uncoiling a wire rod, reducing the diameter from a first diameter to a second diameter through three times of drawing, annealing, reducing the diameter from the second diameter to a third diameter through three times of drawing after annealing, and finally performing finish drawing to a fourth diameter. The high-manganese steel liquid hydrogen storage tank welding material can be used for producing the high-manganese steel liquid hydrogen storage tank welding material, is matched with high-manganese steel welding and is good in forming, the content of Mn in formed weld metal is 24-28 wt%, the situation that due to large-range diffusion of the manganese element, the structure and performance near a fusion line are greatly different is avoided, and the extremely-low-temperature service mechanical performance of the weld metal is guaranteed.

The invention provides a method for improving the reduction performance of pyrolytic carbon in biological sludge and application of the pyrolytic carbon in reduction of steel dust and sludge, and aims at solving the problems of high energy consumption and high carbon emission of a traditional reducing agent in the steel industry and promoting efficient utilization of biomass resources in the field of steel and iron metallurgy. The method comprises the following steps: extracting biological sludge carbon through a toluene solvent to remove oil, and deashing through a sulfuric acid solution, so that the adsorption capacity and catalytic performance of the biological sludge carbon are enhanced, and the reduction efficiency of the biological sludge carbon in the ferrous metallurgy process is improved. The biological sludge carbon subjected to dust removal and oil removal treatment has the specific surface area of 159 m < 2 > / g, the pore volume of 0.14 cm < 3 > / g and the average pore size of 3.4 nm, the specific surface area is remarkably increased, the metallization ratio after the reduction reaction is also greatly improved, and the effectiveness of the method in the aspect of improving the reduction performance of the biological sludge carbon is proved. The carbon emission of the iron and steel industry can be reduced, and powerful support is provided for sustainable development of the iron and steel industry.

The invention belongs to the field of ferrous metallurgy, and discloses an RH refining oxygen blowing decarburization method which comprises the following steps: dynamically adjusting the oxygen blowing flow and the oxygen blowing lance position according to the ratio of the content of carbon to the content of oxygen in RH incoming steel; the oxygen blowing amount is determined according to the initial values of the carbon and oxygen contents in the RH entering steel and the target values of the carbon and oxygen contents after decarburization is finished; a gradient lifting gas flow system is adopted in the RH decarburization process, the oxygen blowing opportunity of RH decarburization and the vacuum pressure in the oxygen blowing process are controlled, and when RH decarburization is finished, molten steel is controlled to be low in oxygen activity. According to different RH entering molten steel components, the oxygen blowing flow and the oxygen blowing lance position are dynamically adjusted, the gradient gas flow increasing system is adopted, the RH decarburization oxygen blowing opportunity, the oxygen blowing process vacuum pressure and decarburization ending molten steel oxygen activity control are combined, the oxygen utilization rate can be effectively increased, the decarburization period is shortened, and the decarburization efficiency is improved. The problem of molten steel recarburization caused by molten steel splashing due to too violent carbon-oxygen reaction is solved, RH efficient decarburization is achieved, the steel ladle top slag oxidability is reduced, and the molten steel cleanliness is improved.

The invention belongs to the technical field of ferrous metallurgy, and particularly relates to a uniform slag adding device for a remelting electroslag furnace, which comprises a feeding device, the feeding device comprises a moving trolley, the top of the moving trolley is fixedly connected with a storage bin, the middle of the moving trolley is fixedly connected with a conveying pipe, and the conveying pipe intermittently rotates through a first rotating column; the expansion air bag gradually expands to exert pressure on the materials, a bridging structure formed by adhesion between the materials can be effectively damaged, meanwhile, the expansion air bag always keeps a certain expansion state within the interval period of the two times of inflation actions, the materials are continuously extruded, and therefore the materials can be continuously inflated. The continuous extrusion can prevent the materials from forming bridging again during the inflation interval, so that the bridging phenomenon is more effectively solved, smooth flowing of the materials is guaranteed, the problems of blockage and the like caused by bridging are avoided, the whole material conveying continuity is guaranteed, and the situation that feeding is uneven due to the bridging phenomenon is avoided.

The utility model belongs to the technical field of ferrous metallurgy, and relates to a crane beam deashing device which is matched with a crane device for use, the crane device comprises a crane girder, a crane arranged on the crane girder and walking wheels used for walking of the crane, and the walking wheels are installed on a track. The pulse bag type dust collector and the multi-stage centrifugal fan are installed on the crane, the pulse bag type dust collector is connected with vacuum suction nozzles through a pipeline arranged on a girder of the crane, and the vacuum suction nozzles are arranged on the two sides of walking wheels; the bottom of the pulse bag type dust collector is further connected with an ash conveying pipeline quick-change connector and a nitrogen pipe quick-change connector through gate valves. According to the utility model, the vacuum suction nozzles are arranged on the two sides of the walking wheels, and the dust removal equipment is arranged on the crane girder, so that the accumulated dust of the crane girder is reduced, the labor intensity of workers is reduced, the accumulated dust of the crane girder is automatically cleaned, and the safety risk is eliminated.

The invention discloses a method for compositely stirring and melting iron materials, and belongs to the field of electric furnace metallurgy in ferrous metallurgy. Specifically, firstly, a bottom blowing stirring device of the electric furnace is arranged, and the mounting angle of a stirring head base body and a lower base plate is changed; meanwhile, a furnace wall oxygen lance or a burner or a carbon spraying gun side blowing device of the electric furnace is arranged, and the installation angles of the water cooling base body and the rear base plate in the horizontal direction are changed, so that the molten steel and the slag form rotating circulation. Aiming at solid iron materials, the shape and the number of the charging articulated chutes are changed, so that the direction of adding the solid iron materials into molten steel is changed to impact a molten pool, and the molten steel and slag form rotating circulation. When the electrodes of the electric furnace are heated, an electromagnetic field of direct current or alternating current generates Lorentz force, so that molten steel and slag in a molten pool form rotating circulation. And finally, the rotating directions of four kinds of circulation formed by bottom blowing, side blowing, solid iron material flow and electromagnetic stirring are kept consistent, and under the heating action of electrodes, composite stirring and solid iron material melting are strengthened, so that the problem of iron material bonding is solved.

The invention belongs to the technical field of ferrous metallurgy, and particularly relates to a method for determining dissolution kinetics of solute in metallurgical slag based on molecular dynamics simulation, compared with a traditional experimental method, molecular dynamics simulation does not need a large number of thermal state experiments and complex detection modes, and large-scale simulation calculation can be rapidly completed on a computer. And meanwhile, various different conditions can be simulated in a short time, and superior processes and slag systems can be quickly screened out. According to the method, the reaction which is difficult to observe clearly can be visualized, the atomic trajectory behavior of the dissolution behavior, the dynamic change, the dispersion process of the solute and the like are provided, rich and accurate information is provided for research on dissolution kinetics, and the dissolution rule and the structure evolution mechanism of the solute in the high-temperature melt can be revealed. In addition, the method is high in safety, and danger possibly brought by a high-temperature experiment is avoided.

The invention discloses a process for extracting high-purity vanadium pentoxide from ammonium polyvanadate, and belongs to the technical field of nonferrous metallurgy. According to the process, efficient purification of vanadium pentoxide is achieved through the steps of sodium hydroxide dissolution, pH adjustment, gradient impurity removal, precise filtration, freezing-unfreezing circulation, high-purity water washing, centrifugal dewatering, two-stage firing and the like. In the process, the gradient impurity removal technology effectively reduces the content of impurities such as iron, sodium and the like, the precision filtration system ensures low residue of the impurities, the freezing-unfreezing circulation step further improves the crystal purity, and the two-stage firing process realizes directional conversion of the alpha-V2O5 crystal form. The purity of the obtained vanadium pentoxide product reaches up to 99.99% or above, the Na < + > content is smaller than or equal to 2 ppm, the Fe residue is smaller than or equal to 5 ppm, the alpha-V2O5 crystal form proportion is larger than or equal to 98%, the problems that in a traditional process, deep impurity removal is difficult, the product purity is insufficient, and crystal form conversion is incomplete are remarkably solved, and an effective technical approach is provided for preparing high-purity vanadium pentoxide.

The invention relates to a method for identifying information of waste steel entering a converter, and belongs to the technical field of ferrous metallurgy. According to the technical scheme, the method comprises the steps that scrap steel is loaded into a scrap steel bucket batch by batch through a crown block by means of a suction magnetic disk crane, the type of the loaded scrap steel is recognized through a deep learning artificial intelligence model, and meanwhile the scrap steel adding time and the weighing weight are recorded; after the scrap steel loading operation is completed, recording the time when the ground vehicle is driven out as the loading ending time; an industrial camera is installed on a converter platform, before a crown block is hoisted to the converter platform, a converter starts a scrap steel adding operation signal, the number of a scrap steel hopper is recognized through the industrial camera, and meanwhile the scrap steel entering time is recorded. According to the method, the accuracy of the information of the steel scrap entering the converter is improved, accurate basic data are provided for automatic, modeling and intelligent production of the converter, the labor intensity of operators is effectively relieved, and a foundation is laid for intelligent transformation and high-quality development of converter smelting.

The invention discloses a production method for reducing flaw detection defects of wind power gear steel, and belongs to the technical field of ferrous metallurgy. According to the method, an electric furnace-LF-VD-continuous casting process route is adopted, the mass fraction of an aluminum element Al in molten steel is controlled to be not lower than 0.018% in the LF refining process, and the mass fraction of [Al] is controlled to be higher than 0.010% all the time in the VD vacuum treatment process. And after VD vacuum breaking, aluminum is supplemented in time, the mass fraction of Al is increased to 0.015%-0.020%, calcium treatment is reasonably carried out, and the mass fraction of Ca in molten steel is controlled to be 0.0006%-0.0009%. By accurately controlling the component change of the molten steel in the VD process, the formation of CaO-MgO-Al2O3-SiO2 inclusions with high SiO2 content is effectively inhibited, the large-size ultrasonic flaw detection defects in the wind power gear steel are remarkably reduced, and the internal quality of the steel is improved. The method is simple in process and remarkable in effect, and has a good industrial application prospect.

The utility model relates to the technical field of ferrous metallurgy, in particular to a continuous casting machine crystallizer inlet water filtering device which comprises a filter chamber, a filtering assembly, a reversing assembly, a water inlet pipe and a water outlet pipe. The water inlet pipe and the water outlet pipe are respectively connected with the filter chamber; the filter assembly comprises a filter screen supporting piece and at least two filter screens, the filter screens are connected with the filter screen supporting piece, and the filter screen supporting piece is connected with the inner side wall of the filter chamber; the reversing assembly comprises an upper partition plate, a lower partition plate and a reversing rod, the reversing rod penetrates through the filter screen supporting piece, namely, the filter assembly is located between the upper partition plate and the lower partition plate, and the water filtering channel is replaced under the condition that water supply is not interrupted through the separation and reversing effects of the reversing assembly. The water filtering device is simple in structure, water entering the crystallizer is filtered, the casting blank quality problem caused by blockage of a water seam and a nozzle of the crystallizer is avoided, water supply of the crystallizer does not need to be interrupted when the water filtering channel is replaced, and therefore production efficiency is improved.

The invention discloses a method for establishing a strip steel buckling phenomenon prediction model in a continuous annealing process, which relates to the technical field of ferrous metallurgy and comprises the following steps: acquiring parameters of a strip steel heating section and a soaking section in the continuous annealing process; the parameters comprise equipment parameters and process parameters; constructing a strip steel transverse temperature distribution model; constructing a strip steel yield stress model; constructing a strip steel tensile stress distribution model; constructing a strip steel transverse pressure stress distribution model; constructing a strip steel buckling wrinkle criterion; correcting a model coefficient based on field measured data; according to the method, the strip steel operation process of the heating section and the soaking section is divided into different research units and strip steel bar elements, the whole-process strip steel buckling phenomenon prediction in the continuous annealing process can be achieved, and the real condition of strip steel buckling under the thermal-mechanical coupling effect in the continuous annealing process can be reflected more accurately and more reliably.