69 results about "Argon flow" patented technology

The invention provides an argon flow and micro-positive pressure linkage control method for an electroslag furnace. The method comprises the steps that the oxygen content and micro-positive pressure signals in the furnace are collected; the future furnace condition is predicted through the deep belief network model; optimizing initial parameters of the fuzzy PID controller in an off-line manner by using a particle swarm algorithm; on the basis of the real-time signal and the prediction result, adaptively adjusting controller parameters on line; and finally, an argon flow and dust removal valve opening control instruction is output in a linkage mode. According to the method, future furnace conditions are predicted through the deep belief network model, the control advancement is realized, and the problem of large lag of the system is solved; offline parameter optimization is carried out on the fuzzy PID controller through a particle swarm algorithm, and excellent initial performance adapting to different working conditions is provided for the fuzzy PID controller; the parameters of the controller are adaptively adjusted through online fuzzy reasoning, so that the system has robustness for coping with a dynamic process; finally, accurate and stable linkage control of the oxygen content in the furnace and the micro-positive pressure is achieved through linkage calculation of the argon flow and a dust removal valve opening instruction.

The invention provides a crystal pulling method for improving the BMD defect density in monocrystalline silicon and a monocrystalline silicon rod, and belongs to the technical field of monocrystalline silicon crystal pulling, and particularly relates to the following steps: stabilizing the oxygen content in a crystal in a relatively high interval by cooperatively regulating and controlling the argon flow, the furnace pressure, the crucible rotating speed, the crystal rod rotating speed and the pulling speed, providing a sufficient oxygen source for generation of BMD defects, and improving the BMD defect density in the monocrystalline silicon on the basis of stabilizing the oxygen content in the crystal in a relatively high interval. In the equal-diameter process, temperature compensation is carried out on a crystal bar through a preset temperature compensation device, diffusion and precipitation of oxygen atoms are effectively promoted to form BMD crystal nucleuses, the BMD body defect density and the axial distribution uniformity are remarkably improved, the specification lower limit of the BMD density is promoted to be improved to 1.0 E + 11 ea / cm < 3 > or above, the internal gettering capacity of a silicon wafer is finally enhanced, and the service life of the silicon wafer is prolonged. And a reliable guarantee is provided for improving the performance and yield of the device.

The application discloses a low-ash-consumption converter smelting method, adopts single-slag smelting, controls the converter scrap steel ratio in 8% to 26%, controls the top blowing oxygen supply flow in 3.0 to 4.0 Nm 3 / (min·t), controls the bottom blowing argon flow in 0.03 to 0.10 Nm 3 / (min·t); the smelting process is improved by the cooperation of the gun position and the charging; the solid waste slag is added in the converter blowing process, the content of CaO in the slag is controlled in 45% to 55%, and the content of MgO is controlled in 5.5% to 7.5%; meanwhile, the dust removal pressure ball is added to improve the activity of FeO in the slag, and the terminal carbon content of the converter is controlled to be less than or equal to 0.05%. By adding the solid waste slag in the smelting process, the slag needed to oxidize a large amount of iron elements to generate FeO is reduced, so that the total iron content of the slag is reduced; by adding the synthetic slag, the liquidity of the slag is ensured, and the carbon-oxygen reaction is promoted; the total iron content of the low-carbon steel converter terminal slag is stably controlled to be less than 14.5%, the metal yield is provided; the lime addition amount can be reduced, the lime addition amount is controlled to be less than or equal to 10 kg / t, and the cost is reduced.

The invention relates to the field of semiconductor materials, in particular to a crystal pulling thermal field control method, a crystal pulling thermal field system and application. The crystal pulling thermal field control method comprises the following steps: in an equal-diameter growth stage of czochralski silicon, when the curing rate of a silicon rod is less than or equal to 30%, controlling the argon flow to be 90-120SLPM, and controlling the furnace pressure to be 800-1000Pa. According to the crystal pulling thermal field control method, in the initial stage of equal-diameter growth where the oxygen segregation effect is most sensitive, argon flow and furnace pressure are cooperatively controlled in a specific'low flow-low pressure 'window, and a process environment beneficial to oxygen volatilization instead of entering crystals is actively created. The segregation and doping of oxygen atoms to a solid-liquid interface are effectively inhibited from the aspect of dynamics, and the method is the most critical step for realizing the overall low oxygen content of the silicon rod, especially reducing the oxygen content of the head and improving the axial uniformity.

The present application relates to a kind of multi-scene adaptive intelligent bottom argon blowing control method and system, comprising: the ladle reaches working position after determining gas permeability, receives the signal of sitting ladle, starts blowing argon, infrared thermal imager is opened to monitor picture and determine molten steel surface, fills complete all ladle liquid level area;Intelligent link all refining equipment PLC, according to different stages of metallurgical purpose, determine the bottom blowing stirring power, calculate the bottom blowing gas pressure, bottom blowing gas flow, the naked area of molten steel in continuous video stream, naked edge slag layer height and other related parameters are tracked and calculated in real time, further optimize bottom blowing control;Flow data instruction is issued to bottom blowing PLC, control the pressure and flow size of bottom blowing gas.The present application automatically receives argon blowing state molten steel video image continuously according to the need of on-site production, uses intelligent bottom blowing control to automatically distribute argon flow and pressure, ensure that each furnace reaches better bottom blowing stirring effect, give on-site production guidance, reduce production labor intensity.

The invention provides a tundish argon control system which comprises a control device, a first pipeline control valve, a mass flow meter and a second pipeline control valve, and a purging branch is formed by connecting the mass flow meter and the second pipeline control valve in series. The control device switches a control mode according to a tundish car position signal: a main pipeline control valve is opened when a tundish car starting signal is received, a main pipeline is closed and a purging branch is started after a casting position is reached, and the argon flow is accurately controlled by adjusting the opening degree of a branch control valve. The argon supply opportunity is advanced to inhibit molten steel oxidation, and the argon flow control precision is improved.

The invention discloses a high-performance N-type skutterudite thermoelectric material barrier layer with a composite structure and a preparation method thereof, and belongs to the technical field of thermoelectric conversion. The preparation method comprises the following steps that a Mo target is installed at a radio frequency target position, a W target is installed at a direct current target position, a skutterudite wafer substrate is fixed to a substrate, and the substrate is heated and vacuumized; and the argon flow is set and introduced, bias voltage is started, radio frequency and direct current power supplies are synchronously started to pre-sputter the target material, then radio frequency sputtering of the Mo connecting layer and direct current sputtering of the W barrier layer are sequentially carried out, and the W-Mo composite barrier layer is prepared. The method is used for solving the technical problems that due to the limitation of the high melting point of refractory metal W, a compact tungsten barrier layer is difficult to prepare through a common sintering process, the diffusion capacity of barrier elements is reduced, mismatch of thermal expansion coefficients of the metal W and a skutterudite matrix is large, and the barrier layer is prone to failure in a thermal cycle service environment.

The invention provides a crucible feeding method in monocrystalline silicon preparation and application, and relates to the technical field of semiconductor material manufacturing. Specifically, when the charging amount of the granular silicon in the crucible is less than or equal to 200kg, firstly, a small material is charged into the bottom of the crucible, then the granular silicon is charged into the middle of the upper part of the small material, then the space between the granular silicon and the wall of the crucible is filled with blocky silicon, and finally, the blocky silicon is flatly laid on the upper part of the granular silicon; when the charging amount of the granular silicon in the crucible is greater than 200kg, firstly charging a small material into the bottom of the crucible, then paving the granular silicon on the upper part of the small material, and finally paving the small material on the upper part of the granular silicon; in addition, the argon flow in the re-feeding stage is controlled to be higher than the argon flow in the initial charging stage. According to the invention, the sputtering phenomenon in the process of initially charging the granular silicon can be effectively reduced, the sputtering of the granular silicon is obviously reduced by measures of improving the charging mode, optimizing the heating process, controlling the melt state and the like, and the quality of monocrystalline silicon is improved.

This invention discloses a method and system for preventing electrode breakage in refining furnaces using quantitative bottom blowing of hot slag with low current, belonging to the field of metallurgical technology. The method includes: pouring circulating hot slag at a temperature not lower than 1450℃ into the ladle to soften the crusted slag layer; quantitatively adjusting the bottom blowing argon flow rate, extracting the argon pore opening diameter using a visual sensor and establishing a calculation model to maintain liquid level stability; switching the electrode raising and lowering to manual mode, setting a low arc-starting current of 10000 amperes, and using a laser reference to control the three-phase electrode flatness error within ±5mm; acquiring electrical and acoustic signals at a period of not less than 100 milliseconds to construct a multi-dimensional model to determine successful arc ignition; after stabilization, increasing the power at a preset slope and switching back to automatic mode. Through hot slag modification, quantitative bottom blowing, low-current arc ignition, and multi-dimensional monitoring, the risk of electrode breakage in the early stages of arc ignition is significantly reduced, improving the safety and stability of the refining process.

This invention discloses a method for producing high-nitrogen steel with nitrogen enhancement, comprising: Step 1, converter smelting: using bottom blowing mode with nitrogen blowing throughout the process; Step 2, refining LF furnace: the LF furnace is bottom-blown with nitrogen before the third power supply and bottom-blown with argon after the third power supply. Slag formation, deoxidation, and alloying are performed during the refining LF furnace process, and the composition of the molten steel is controlled and tested; Step 3, refining RH furnace: nitrogen is used as the vacuum treatment driving gas, and the nitrogen content is controlled by adjusting the high and low vacuum times. After RH furnace vacuum breaking, calcium treatment is performed, carbonized rice husks are added to cover the molten steel surface, and argon flow is adjusted for soft blowing. Samples are taken to confirm the nitrogen content; Step 4, continuous casting: continuous casting is performed using a continuous casting machine. This application achieves precise control and stable maintenance of the nitrogen content in high-nitrogen steel by using nitrogen blowing throughout the converter process, nitrogen enhancement in the refining LF furnace before the third power supply, and nitrogen enhancement in the refining RH furnace, thus meeting the quality requirements of high-nitrogen steel. The production process is simple, which is beneficial for improving production efficiency and reducing production costs.

This invention relates to a method for preparing a hole transport layer in a perovskite solar cell and its application. The method requires no annealing throughout and specifically includes: S1. Using a nickel target, a first nickel oxide layer is prepared on a substrate surface by magnetron reactive sputtering at a pressure of 0.2–0.4 Pa and an argon gas flow rate of 200–600 sccm, wherein the argon to oxygen flow rate ratio is 20–30%; S2. Using a nickel oxide ceramic target, a second nickel oxide layer is obtained by magnetron physical sputtering at a pressure of 0.3–0.5 Pa and an argon gas flow rate of 200–600 sccm, wherein the oxygen to argon flow rate ratio is 1.5–5%. The technical problem to be solved is how to provide a method for preparing a hole transport layer that combines nickel reactive sputtering with nickel oxide ceramic target physical sputtering using magnetron sputtering equipment, requiring no annealing throughout the process, significantly reducing preparation costs, and forming a film structure more conducive to hole transport.

The invention relates to a novel method for realizing helical carbon growth by using an electro-deposition nickel catalyst, which comprises the following steps: (1) cutting a copper foil into a required size, and sequentially carrying out ultrasonic cleaning in ethanol and acetone to obtain a sample; (2) carrying out electro-deposition on the sample in a nickel plating electrolyte; (3) placing the Cu foil sample plated with the Ni film on a quartz boat, placing the quartz boat at the central position of a horizontal tube furnace, and introducing argon before heating; and (4) raising the furnace temperature, after the temperature is stable, introducing acetylene as a carbon source, maintaining the argon flow, reacting for several minutes, generating a carbon micro / nano coil on the surface of the Ni catalyst, stopping supply of acetylene after deposition is finished, and naturally cooling the sample to room temperature under the condition of continuously introducing Ar atmosphere so as to avoid oxidation. According to the method disclosed by the invention, extensible, repeatable and high-yield synthesis of the carbon micro / nano coil is realized, and a new technical approach is provided for high-performance electromagnetic wave absorption and preparation of a multifunctional composite material.

The invention relates to a preparation method of a copper seed layer, and the preparation method comprises self-ionization plasma sputtering, and when the copper seed layer is deposited, the argon flow is 1sccm to 10sccm, the direct current sputtering power is 10kW to 20kW, the radio frequency bias power is 150W to 250W, and the initial temperature is 20 DEG C to 30 DEG C. The preparation method provided by the invention is carried out under the condition of relatively low initial temperature, so that damage and stress accumulation of high temperature to silicon dioxide are avoided; the method is carried out under the condition of high direct-current sputtering power, sputtering particle energy can be balanced, and compact deposition of Cu atoms is promoted. Due to the arrangement of radio frequency bias power, Ar atom bombardment can be enhanced, Cu atoms are migrated to low-energy crystal lattice sites, and surface protrusions are reduced; plasma can be stabilized by setting the argon flow, and uniform deposition of the copper seed layer is ensured. Therefore, according to the preparation method provided by the invention, the TSV electroplating quality can be improved, and the SIP interconnection reliability is improved.

The invention discloses a production method of a peritectic steel continuous casting sheet billet. The technical problem that when an existing sheet billet continuous casting machine is used for producing the peritectic steel continuous casting sheet billet with the w [Al] in the steel being 0.022%-0.042%, the corner crack occurrence rate of the continuous casting sheet billet is high is mainly solved. According to the technical scheme, the production method of the peritectic steel continuous casting sheet billet comprises the steps that (1) a top-bottom combined blowing converter is adopted for smelting, argon is blown from the bottom in the whole smelting process, and the argon flow is 0.05-0.10 Nm < 3 > / (min.t); (2) controlling the smelting end point of the converter; 3) immediately tapping after the converter blowing is finished; 4) transporting molten steel in the steel ladle to an argon blowing station, and uniformly stirring the molten steel; (5) transporting the molten steel in the steel ladle to an LF furnace to carry out molten steel temperature regulation and control and component regulation and control; and 6) carrying out slab continuous casting on the molten steel to obtain a continuous casting slab. The corner crack occurrence rate of the peritectic steel continuous casting sheet billet produced through the method is smaller than or equal to 0.41%.

The invention relates to the technical field of metal material production, in particular to a hot rolling method for improving the impact stability of low alloy steel and medium and wide strip steel. The method comprises the following steps: 1) smelting and refining: adding a titanium alloy after deoxidation, controlling the argon flow to stabilize the Ti element yield, deeply desulfurizing by adopting high-alkalinity and high-reducibility slag, and controlling [S] to be less than or equal to 0.005%; 2) continuous casting: controlling [N] to be less than 50ppm by adopting protective casting; and (3) rolling and cooling are conducted, specifically, the finish rolling temperature and the laminar cooling rate are controlled, and the coiling temperature is accurately controlled by regulating and controlling side spraying, air sweeping and cooling strategies. The method systematically solves the technical problems of unstable impact performance and generation of bainite and other abnormal structures caused by component fluctuation and inaccurate process control of the aluminum-containing low alloy steel. And the prepared medium-wide strip steel is uniform in full coil performance, the longitudinal impact energy at 0 DEG C is stable and is not lower than 100J, and the product quality is remarkably improved.

The present application belongs to the technical field of argon arc welding control, and particularly relates to a manual tungsten argon arc welding external control device and a control method. The control device and the control method are characterized by the welding circuit on-off module for controlling the on-off of the welding circuit, the argon on-off module for controlling the on-off of the argon, the delay closing module for controlling the on-off of the argon flow, the delay on module for controlling the on-off of the welding circuit, the DC-DC power module for supplying power to each component, the high-frequency coupler and the high-frequency arc starting module for realizing high-frequency arc starting, and the switch module for controlling the switch of the device. The control device can control the arc starting, argon and electricity required in the manual tungsten argon arc welding process, and can solve the problem that the welding machine position needs to be frequently moved in the manual tungsten argon arc welding with large distance and frequent change of the welding field. The ordinary direct current welding machine with the step-down output external characteristic can have the manual tungsten argon arc welding function, so as to improve the welding quality, safety, save argon, improve the utilization rate of the welding equipment and the like.

The application discloses a method for preventing steel penetration between plate surfaces of a submerged nozzle quick-change mechanism, 1) under the premise of stable refractory material quality, the nozzle baking method is changed, rapid baking is adopted during baking, the total baking time is controlled to be 1.5-2.5 h, the temperature reaches the range of 1000-1100 DEG C, and the nozzle temperature before use is ensured to be greater than or equal to 950 DEG C; 2) argon is used for sealing between plates of the submerged nozzle quick-change mechanism in a tundish, and the argon flow is controlled to be 10 L / min; 3) a heat insulation steel plate is installed at the lower part of the submerged nozzle quick-change mechanism, 4) the inspection and maintenance of the submerged nozzle quick-change mechanism are well done, all threads and machining holes of a main frame are inspected, and compressed air is used for cleaning; the main frame cooling channel is inspected by using compressed air, and if the channel is blocked, the channel is required to be thoroughly cleaned; 5) the compression force of the spring must be tested after the quick-change mechanism is taken offline each time.

The invention discloses a multistage coating oxygen-mediated annealing preparation method based on RAFM steel / titanium nitride, and belongs to the technical field of coating preparation. The method comprises the steps that a TiN coating is deposited on the surface of a low-activation ferrite / martensitic steel matrix through magnetron sputtering, a pure titanium target material is used, the nitrogen-argon flow ratio is 1: 13-1: 18, the background vacuum degree is 4-6 * 10 <-5 > Pa, the deposition time is 60-90 min, and extra active heating is not applied to the matrix in the deposition process; placing the deposition coating sample in a quartz tube for packaging, wherein the gas pressure in the tube provides a trace oxygen atmosphere; and then annealing treatment is conducted at the temperature of 800-1000 DEG C, and heat preservation is conducted for 90-120 Through oxygen-mediated element diffusion and reaction, a multi-stage composite structure sequentially comprising an inner oxide layer, an Fe inner enrichment layer, a TiN layer, an Fe outer enrichment layer and an outer oxide layer from a matrix to the outside is formed in the TiN coating in situ. The method is simple in process, a transition layer does not need to be additionally deposited, and the prepared multi-stage coating is well combined with a matrix interface, has excellent thermal shock resistance and can bear more than 30 times of thermal shock cycles.

The invention relates to a method for improving the accuracy of a steel sample obtained by molten steel inspection and analysis in a steelmaking production process, and belongs to the technical field. According to the technical scheme, the method is operated according to the following steps that firstly, the steel ladle bottom blowing argon flow is adjusted, slag on the surface of molten steel in a steel ladle slightly moves, and the exposed diameter of the surface of the molten steel in the steel ladle is smaller than or equal to 100 mm; 2, the sampler is inserted into the position 200-400 mm below the liquid level of the molten steel and stays for 3-5 seconds, and the sampler is withdrawn; 3, putting the steel sample in the sampler into an air cooler for cooling, and then putting the steel sample into a water cooler for cooling to room temperature; and 4, the cooled steel sample is conveyed to a test center through an air conveying system to be tested. The method has the beneficial effects that the quality of the steel sample is improved by controlling the temperature of molten steel, the bottom blowing stirring strength of the steel ladle, the insertion depth and time of the sampler and the cooling mode of the steel sample, and the test result of the steel sample can be quickly and accurately reported.

The invention belongs to the technical field of chemical vapor deposition, and particularly discloses a preparation method of iron-based tungstate based on chemical vapor deposition, which comprises the following steps: S1, precursor pretreatment: mixing FeCl2 and WO3 in proportion; s2, substrate pretreatment: cleaning a mica sheet, blow-drying the mica sheet with nitrogen, and then fixing the mica sheet in a chemical vapor deposition reaction chamber; s3, reaction chamber atmosphere replacement: argon is introduced for purging; s4, heating and reacting: adjusting the argon flow and the hydrogen flow, heating to 550-700 DEG C, and reacting for 5-20 minutes at a constant temperature; and S5, cooling and collecting: keeping the argon atmosphere, cooling to room temperature, and obtaining the FeWO4 nanosheet on the mica substrate. According to the preparation method of the iron-based tungstate based on the chemical vapor deposition, introduction of impurities in the synthesis process is avoided, and synthesis of high-crystallinity FeWO4 and accurate design of the FeWO4 nanosheet morphology are achieved.

This invention discloses a method for preparing a B4C-reinforced CoCrFeNiTi high-entropy alloy composite coating. The method includes the following steps: spraying and remelting unmixed B4C CoCrFeNiTi powder onto a 45 steel substrate; adjusting the argon flow rate and power during laser cladding and remelting until no black material accumulation areas are found at the edge and bottom of the molten pool, and simultaneously achieving a pot-bottom shaped interface between the coating and the substrate with a melting depth of 380-400 μm, thus obtaining laser cladding and remelting parameters; preparing a mixed powder by proportionally configuring Ni-B4C powder and CoCrFeNiTi powder, wherein B4C powder accounts for 4-8% of the mixed powder mass; plasma spraying the mixed powder onto the pretreated 45 steel substrate; and remelting the mixture according to the aforementioned laser cladding and remelting parameters to obtain the B4C-reinforced CoCrFeNiTi high-entropy alloy composite coating. In this invention, the hardness of the remelted layer is not less than 751 HV, and the wear volume is not greater than 0.874 × 10⁻⁶. 6 μm 3 .

The application discloses a novel oxygen-reducing hot field, wherein an upper heat preservation barrel is arranged on a middle heat preservation barrel, and the upper heat preservation barrel and the middle heat preservation barrel are coaxially arranged; the inner diameter of the upper heat preservation barrel is the same as that of the middle heat preservation barrel; when the top of a crucible is arranged in the upper heat preservation barrel, a gap between the inner wall of the upper heat preservation barrel and the outer sidewall of the crucible forms a second airflow path, and a gap between the inner wall of the middle heat preservation barrel and the outer sidewall of the crucible forms a first airflow path. The upper heat preservation barrel and the lower heat preservation barrel are coaxially arranged and have the same inner diameter, so that the width of the first airflow path and the second airflow path formed during the lifting of the crucible is kept consistent, the airflow path is not narrowed, the argon flow is not blocked, the gas in the cavities of the upper heat preservation barrel and the lower heat preservation barrel is continuously and efficiently exchanged, the oxygen impurities volatilized from the crystal pulling liquid surface can be timely and sufficiently removed, the oxygen impurity content in the monocrystalline silicon is obviously reduced, and the quality of the monocrystalline silicon is improved.

The invention discloses an argon flow self-adaptive adjusting method applied to a steel plant. Comprising the following steps: step 1, data acquisition and preprocessing; 2, establishing a refining process model; 3, the argon flow is initially set; and 4, monitoring in real time and adaptively adjusting the argon flow by using the refining process model, and further adjusting parameters and strategies of a control algorithm according to a monitoring result. According to the argon flow self-adaptive adjusting method, the molten steel state can be monitored in real time, and the argon flow is dynamically adjusted according to the real-time change of the molten steel, so that the refining efficiency is improved, the molten steel quality is optimized, and the energy consumption is reduced. In addition, the method further has the advantages of being high in self-adaptive capacity, easy and convenient to operate and easy to integrate into an existing refining control system.

The invention belongs to the technical field of continuous casting of cold forging steel, and particularly discloses a method for producing cold forging steel through continuous casting of small square billets, which comprises the following steps: controlling the argon blowing flow and time of molten steel in an argon blowing station, and controlling the addition amount of calcium carbide and aluminum iron alloy, the refining final temperature and the refining time in a refining furnace; the hole diameters of an upper nozzle and a submersed nozzle, the degree of superheat and the pulling speed of a starting furnace are controlled in a tundish, then the adding amount of a covering agent, the degree of superheat and the pulling speed of a continuous casting furnace are controlled in the casting process, electromagnetic stirring parameters are controlled in a crystallizer, and the specific water flow and the cooling speed are controlled in a secondary cooling area; the purity of molten steel is increased by strictly controlling the argon flow of an argon blowing station and the temperature of a refining furnace, then a proper amount of argon is blown in through a tundish and a water gap to reduce blockage, and finally the temperature and the cooling speed of a crystallizer and a secondary cooling area are strictly controlled. The problems that in the production process of a cold heading steel continuous casting machine, molten steel liquidity is poor, and cracks appear on the surface and inside of a steel billet are solved.

The present application relates to air separation device system control technical field, specifically disclose a kind of automatic constant load control method of air separation device, material balance module system air transparent guide vane tracks raw material air flow of purification system, editing module system controls air transparent guide vane constant purification system processing air volume;Editing module system controls oxygen production regulating valve to track actual oxygen flow;3) editing module system controls nitrogen production regulating valve to track the oxygen, nitrogen multiple of actual oxygen flow;Editing module system controls dirty nitrogen production regulating valve to track actual dirty nitrogen flow;Expansion air volume tracks oxygen production or processing air volume editing module control expander nozzle opening and bypass valve, adjust expansion air into upper column processing air volume and bypass air volume;Process argon flow regulating valve tracks process argon flow editing module system control;The present application does not independently unit configuration automatic load variation system with additional investment, realizes processing air volume and output balance prediction, material balance.

The application discloses a full-process intelligent refining system applied to an RH furnace and belonging to the technical field of steel metallurgy. The system comprises data acquisition, temperature control, intelligent argon blowing, vacuum control, decarburization control, alloy calculation, wire feeding control and intelligent control modules. The data acquisition module acquires refining data in real time and distributes the data to various functional modules; the temperature control module calculates oxygen blowing quantity and aluminum particle adding quantity by establishing a molten steel temperature rising model; the intelligent argon blowing module adjusts argon flow in real time based on image processing; the vacuum control module dynamically maintains a vacuum environment; the decarburization and alloy calculation modules accurately calculate oxygen blowing quantity and alloy adding quantity respectively; and the wire feeding control module dynamically sets wire feeding parameters. Through the collaborative work of various modules, the application realizes full-process intelligent and accurate control from ladle entry to exit, and effectively improves molten steel quality stability, production efficiency and resource utilization.

The utility model discloses a kind of flow guide structure and single crystal furnace applied to single crystal furnace hot field.The flow guide structure can include: flow guide cylinder and flow guide component, wherein, flow guide component includes first flow guide part and second flow guide part, first flow guide part extends from the outer periphery of the lower end opening of flow guide cylinder in the direction of radial away from the central axis of flow guide cylinder and simultaneously downwardly inclined relative to the lower end opening outer periphery of flow guide cylinder, second flow guide part extends from the extension end of first flow guide part in the direction of radial away from the central axis of flow guide cylinder and simultaneously upwardly inclined relative to first flow guide part.The flow guide structure can accelerate the argon flow rate passing through liquid surface, to take away more oxygen impurities, reduce the oxygen content of drawn single crystal silicon rod.

According to the metal powder production device for additive manufacturing, a horizontal partition plate is arranged in an inner cavity of a working barrel, a containing groove is formed in the top face of the partition plate, a protective baffle is arranged on the periphery of a driving motor, and the working end of the protective baffle extends upwards to be provided with a rotating shaft; the rotary atomizing disc is arranged above the partition plate, the center of the bottom face of the rotary atomizing disc is fixedly connected with the top end of the rotating shaft, a plurality of sets of filtering holes are formed in the top face, a hollow storage column is arranged in the center of the top face, a plurality of sets of discharging holes are formed in the outer wall of the storage column, and the two sets of transverse splitting rods are located below the discharging holes respectively and connected through longitudinal splitting rods. The outer ends of the two sets of transverse split rods are jointly connected with high-temperature smelters, and the arc-shaped baffles are arranged between the adjacent high-temperature smelters. The Laval nozzle is combined with the magnetic self-locking adjustable baffle, the direction and strength of argon flow can be controlled, secondary crushing of atomized primary liquid drops is achieved, needed particle size distribution is obtained, and low-pressure gas can be accelerated to a supersonic speed state within a short time.

The invention discloses a preparation method of an alloy casting blank, the alloy casting blank and a steel product. The method comprises the following steps: smelting molten steel in a converter to prepare converter molten steel; tapping the molten steel of the converter and transferring the molten steel of the converter to a steel ladle; in the tapping process, argon is blown from the bottom of a steel ladle, and the argon flow is 10-40 Nm / h; the temperature of the molten steel in the steel ladle is measured, the adding amount and adding batch of the alloy are calculated according to the temperature measuring result and the target components of the alloy casting blank so as to control the temperature of the molten steel after the alloy is added, and the temperature of the molten steel is controlled to be larger than or equal to the liquidus temperature of the target components of the alloy casting blank plus 10 DEG C; adding the alloy into the molten steel in the steel ladle according to the adding amount and the adding batch of the alloy; and the molten steel in the steel ladle is subjected to LF refining and continuous casting, and an alloy casting blank is obtained.

The application discloses a kind of based on metallurgical slag component and the dynamic adjustment method of electromagnetic stirring associated with cold rolling defects, according to historical data, construct with (CaO+MgO)‑(Al2O3+SiO2)‑FeO as the vertex ternary phase diagram, and mark the defect occurrence area of the refining finished slag in ternary phase diagram corresponding to the defective furnace, and with it as basis to judge the purity of molten steel, then according to the purity of molten steel dynamically adjusts argon flow and electromagnetic stirring process, to reduce molten steel inclusions, improve slab quality.