4931 results about "Heating furnace" patented technology

The invention relates to the technical field of control, and particularly discloses a multivariable energy efficiency optimization control system for a heating furnace, which is used for solving the problems of local overheating, non-uniform temperature and difficulty in accurate positioning and compensation of heat loss in the operation of the existing cracking heating furnace. Comprising a parameter detection module, a multivariable coupling modeling and simulation module, an optimization control module and an execution and feedback module. According to the method, dynamic digital twinning is constructed through multi-modal online sensing and data assimilation, a Pareto frontier solution is generated based on model prediction control and improved NSGA-II parallel optimization, and the weight is adaptively adjusted; and when the hot spot / cold spot is triggered, a quadric surface fitting compensation strategy is implemented and issued for execution, so that high-precision simulation prediction, precise closed-loop control and real-time online energy efficiency optimization are realized.

The invention discloses a self-correction optimization method and system for heat transfer boundary conditions of a water jacket heater, and particularly relates to the technical field of condition optimization control. The method comprises the following steps: constructing a thermal fatigue deformation trend estimation model by collecting a furnace wall surface temperature sequence, furnace wall surface heat flux distribution information and a furnace wall thermal stress response curve of a furnace body structure component, and generating a geometric parameter drift vector; performing structure equivalent mapping analysis on the geometric parameter drift vector, and extracting contact thermal resistance change information; performing furnace wall heat flow field reconstruction on the geometric parameter drift vector to obtain a dynamic correction vector; and the contact thermal resistance change information and the heat flow correction vector are comprehensively analyzed, a time-varying boundary condition inversion model is constructed, and a multi-parameter coupling boundary correction set is output and used for updating the boundary conditions in the water jacket heating furnace heat transfer simulation model, so that identification and self-adaptive correction of the boundary conditions are realized, and the heat transfer control precision and the heat efficiency are improved.

The invention discloses a forging method for improving plasticity of a large invar alloy steel ingot and invar alloy, and the forging method comprises the following steps: smelting molten steel by adopting an electric furnace, and casting to obtain the large invar alloy steel ingot with the weight of 15-25t; the cold-state invar alloy steel ingot is heated to 1000-1200 DEG C for heat preservation, and the heat preservation time is controlled to be longer than or equal to 10 h; the heated invar alloy steel ingot is subjected to three-heating-number upsetting and drawing-out, upsetting is conducted according to the rolling reduction of 15-50% of the total height of the invar alloy steel ingot in each heating number, the invar alloy steel ingot is drawn out to the height of the original invar alloy steel ingot after upsetting, and the invar alloy steel ingot is returned to a heating furnace to be heated and subjected to heat preservation after upsetting and drawing-out in each heating number; the final forging temperature of the last heating number is greater than or equal to 750 DEG C; and the invar alloy steel ingot subjected to heating and heat preservation in the last heating number is forged to the specified size, and then the invar alloy steel ingot is slowly cooled to the room temperature in air to obtain an invar alloy steel forging stock. The thermoplasticity of the large invar alloy steel ingot is improved, and the technical problem that the large invar alloy steel ingot is prone to cracking during forging is solved.

The invention relates to the technical field of magnesium-aluminum alloy heat treatment, and discloses a high-strength and high-conductivity magnesium-aluminum alloy heat treatment method which comprises the following steps: step 1, surface cleaning treatment: carrying out surface cleaning treatment on a magnesium-aluminum alloy workpiece to remove oil stains, impurities and an oxide layer on the surface; secondly, preheating treatment is conducted, specifically, the cleaned magnesium-aluminum alloy workpiece is put into a heating furnace, the temperature is slowly increased to 200 DEG C at the temperature increasing speed of 10 DEG C / min, and heat preservation is conducted for 1-2 hours at the temperature; thirdly, the temperature is rapidly increased to the solid solution temperature, and after preheating treatment is completed. Precipitated phase distribution is optimized through two-stage aging treatment, a precipitated phase is preliminarily formed through low-temperature short-time aging, then the precipitated phase is uniformly grown through high-temperature long-time aging, local aggregation is avoided, meanwhile, solution treatment and quenching cooling are optimized, uniform dissolution of solute atoms is ensured, the alloy strength and hardness are improved, and the service life of the alloy is prolonged. And the fatigue resistance and the crack propagation resistance are remarkably improved through uniform precipitated phase distribution.

The invention belongs to the technical field of crude oil electric heating furnaces, and relates to a crude oil electric heating furnace control system and a crude oil electric heating furnace. Temperature feature vectors of multiple independent heating sections are collected, a dynamic weight matrix used for representing the thermal inertia unbalance degree is generated, and temperature control compensation gains are generated through real-time analysis in combination with crude oil viscosity-temperature data; performing adaptive adjustment by combining corresponding element values of the dynamic weight matrix to output a segmented power regulation instruction, preferentially calling redundant power of the main and auxiliary coils for cooperative heating, starting adjacent segment compensation heating when the main and auxiliary power is insufficient, and setting heat balance constraint and deviation monitoring termination conditions at the same time; local over-coking is avoided while the power resource utilization rate of the crude oil electric heating furnace is remarkably improved, the viscosity is rapidly converged to a steady-state range through closed-loop feedback of viscosity data after heating and iterative optimization of a regulation instruction, and the stability of long-term operation of the system and the achievement speed of a control target are remarkably improved.

The invention discloses an automatic feeding and discharging device of a continuous heating furnace, and relates to the technical field of industrial heat treatment equipment. An automatic feeding and discharging device of a continuous heating furnace comprises two first transmission rollers rotationally connected to a feeding port and a discharging port of a furnace body, and further comprises a conveying mesh belt connected to the two first transmission rollers in a sleeving mode; the first motor is fixedly connected to one side of the furnace body; through cooperative operation of the conveying net belt and the conveying belt with the jacking columns, dynamic adjustment of the jacking frequency and precise synchronous control are combined, the contact area of a workpiece and the conveying belt is effectively reduced, bottom thermal compensation is achieved through the heat conduction jacking columns, and meanwhile through integrated control of an automatic adjustment system and the waste heat recovery device, the waste heat recovery efficiency is improved. The problems that traditional equipment is uneven in heating, high in energy consumption and frequent in maintenance are solved, and the device has the advantages that the workpiece heating uniformity is improved, the service life of the device is prolonged, energy consumption is reduced, and intelligent dynamic regulation and control are achieved.

The invention relates to the technical field of capacitor films. The invention discloses a preparation process of a multilayer polypropylene capacitance film, which comprises the following steps: S1, raw material preparation: preparing basic resin, a nano ceramic filler, a nucleating agent and an antioxidant into multilayer raw materials respectively; s2, fusing multiple layers of raw materials by an independent screw extruder, and compounding by a co-extrusion die head to form a film blank; and S3, carrying out air ring gradient cooling on the film blank. And S4, longitudinally and transversely stretching the film blank. And S5, performing heat setting in a segmented heating furnace, and performing corona treatment to improve surface energy. And S6, segmentally curing the moisture-proof coating by using an infrared oven. The multilayer heterostructure is adopted, the comprehensive performance of the capacitor film is improved through material matching, the dielectric constant, the breakdown strength and the moisture resistance are enhanced, and the problem of considering the dielectric property and the mechanical property is solved. The innovative process guarantees stable performance, is compatible with an existing production line, can realize large-scale production, meets the requirements of fields such as new energy and the like, and provides a feasible scheme for localization of high-performance capacitor films.

The invention discloses a wear-resistant steel ball production process and surface treatment equipment thereof, and belongs to the technical field of wear-resistant balls, and the wear-resistant steel ball production process comprises the following steps: step 1, weighing raw materials, smelting the raw materials, and casting into a continuous casting billet; (2) the continuous casting billet obtained in the step (1) is placed in a steel rolling heating furnace to be heated to 1120-1250 DEG C, heat preservation and thorough burning are conducted, and then the continuous casting billet enters a continuous rolling unit to be rolled into a round steel bar; 3, the round steel bar is sent to a heating furnace to be heated to 1030 DEG C to 1100 DEG C, heat preservation is conducted, the round steel bar is taken out of the furnace after thorough burning, then the round steel bar is rolled into steel balls on a ball rolling machine, and the rolling temperature is 940 DEG C to 960 DEG C; 4, the steel balls with the waste heat enter a quenching water tank along a roller way to be subjected to water-cooling quenching, and the water entering temperature of the steel balls during quenching is 830-860 DEG C; and 5, tempering is conducted after quenching of the steel ball, the tempering temperature ranges from 160 DEG C to 200 DEG C, surface treatment is conducted after cooling, and finally the high-abrasion-resistance steel ball is obtained. The wear-resistant steel ball is high in production efficiency and high in quality; and the steel balls are uniform, high in core hardness, low in breakage rate and excellent in wear resistance.

The embodiment of the invention provides a method for solving surface scabbing of a prestressed PC (Poly Carbonate) rod, which comprises the following steps: after a square casting blank of the prestressed PC rod is output from a continuous casting machine, the square casting blank is fed into a spraying device for quenching, so that the surface temperature of the square casting blank is reduced to be below 500 DEG C; the quenched square casting blank is fed into a heating furnace to be subjected to temperature returning treatment; and the square casting blank subjected to temperature returning treatment is rolled. According to the technical scheme, the square casting blank is not naturally cooled off line like an existing cold conveying process, the square casting blank is quenched, the temperature of the square casting blank is rapidly cooled to the preset temperature, then rolling work is started through temperature returning, the whole process is conducted on line, the square casting blank does not need to be off line, and therefore production efficiency is greatly improved.

The invention discloses a preparation method of a precise seamless steel tube for a drill rod of a rotary drilling rig, and relates to the field of steel tubes. Comprising the following steps that raw materials are prepared and smelted, molten iron or high-purity waste steel with low phosphorus content, low sulfur content and low gas content is selected as a main raw material, and then the main raw material is subjected to external refining, component fine adjustment and continuous casting and blank treatment; hot piercing is carried out, specifically, the continuous casting round billet is loaded into an annular heating furnace, a multi-section heating system is adopted for heating, and then hot piercing treatment is carried out in a two-roller skew rolling piercing machine; hot rolling extension is conducted, specifically, the perforated tubular billet is rapidly fed into an online heating furnace, and then rolling is conducted on a multi-rack retained core rod or full-floating core rod continuous pipe rolling machine; and sizing / reducing, and rapidly heating. The steel pipe has rigidity, strength and humanity, the fatigue life of the steel pipe is prolonged, meanwhile, the surface smoothness of an inner hole is high, the dimensional tolerance of the inner diameter and the outer diameter is accurate, the wall thickness uniformity is high, the straightness is good, and in addition, the steel pipe also has high internal cleanliness and good wear resistance.

The invention relates to the technical field of metal powder manufacturing products, in particular to an automatic ring part production line and a process control method.Bar heating furnaces of the production line are arranged on the inner side and the outer side of a guide rail in two rows and multiple sets, a transfer manipulator is arranged on the guide rail, a ring forging press machine is arranged at the front end of the guide rail, and a movable workbench is arranged at the ring forging press machine; the ring rolling machine is arranged in front of the ring forging press machine, the center line of the ring rolling machine and the center line of the ring forging press machine are obliquely arranged, a carrying mechanical arm is arranged between the ring rolling machine and the ring forging press machine, the conveying roller way is arranged in front of the ring rolling machine, and the center line of the conveying roller way and the center line of the ring rolling machine are obliquely arranged. The center line of the conveying roller way is parallel to the center line of the ring forging press, and the swing manipulator is arranged in an included angle formed by the ring rolling machine and the conveying roller way. According to the production line and the control method, the production process is optimized, the production efficiency is improved, and the production cost is reduced.

The utility model relates to the technical field of heating furnaces, in particular to an alloy vacuum furnace which comprises a furnace body and a heating mechanism arranged in the furnace body, the heating mechanism comprises a plurality of annular heating pieces, the annular heating pieces are divided into top heating pieces, bottom heating pieces and a plurality of middle heating pieces, the bottom heating pieces are fixedly connected with the inner wall of the furnace body, and the middle heating pieces are fixedly connected with the furnace body. The top heating piece and the middle heating piece move in the height direction of the furnace body through a vertical adjusting mechanism, the vertical adjusting mechanism comprises a screw rod and a connecting block, the connecting block is fixedly arranged on the periphery of the top heating piece, the screw rod is arranged in the height direction of the furnace body, and the upper end of the screw rod is in threaded connection with the connecting block; the lower end of the screw penetrates through the furnace body and is fixedly connected with an output shaft of a transmission motor arranged at the bottom of the furnace body. According to the alloy vacuum furnace, by adjusting the heating piece, the heating range of the heating piece is matched with the height of alloy contained in the crucible, heat energy of the heating piece is concentrated to heat the alloy, and the heat energy utilization rate is increased.

The invention relates to the technical field of annealing furnaces, in particular to an annealing furnace heating system which comprises a furnace body, an air blower arranged at the top of the furnace body and used for exhausting and sucking air and a heating bin used for heating air in the furnace body. The top of the furnace body is further provided with an air compression mechanism used for making air in the furnace body circularly flow, the air compression mechanism communicates with the interior of the heating bin through a pipeline, the bottom in the heating bin is connected with an air outlet pipe, and the end, away from the heating bin, of the air outlet pipe is connected to the top end in the heating bin. And the compression pipe is connected with a plurality of air inlet pipes which are transversely arranged side by side at the bottom of the furnace body, and the other end of the compression pipe communicates with the input end of the air compression mechanism. The heating system of the annealing furnace is improved, so that hot air in the annealing furnace is uniformly distributed, a workpiece is uniformly annealed, and the physical performance of the annealed workpiece is improved.

The utility model relates to an organic carbon element carbon monitoring system and an automatic standard solution dropwise adding device thereof, and belongs to the technical field of carbon detection. The organic carbon element carbon monitoring system comprises a heating furnace and a control system, an optical channel is located in the heating furnace, a sampling filter membrane is arranged in the optical channel, and a detector is arranged at an outlet of the optical channel; the device for automatically dropwise adding the standard solution comprises a first branch pipe, a quantitative pipeline and a carrier liquid supply pipeline, wherein the first branch pipe is used for extending into a heating furnace; the quantitative pipeline is used for providing quantitative standard solution; the carrier liquid supply pipeline is used for providing carrier liquid; the input end of the first branch pipe is communicated with the output end of the standard solution quantitative pipeline; the output end of the carrier liquid supply pipeline is communicated with the input end of the standard solution quantification pipeline, and the carrier liquid supply pipeline is used for driving a quantitative standard solution to a reaction area of the organic carbon element carbon monitoring system. According to the device, the measurement of carbonate carbon in the ambient air particulate matters is realized. The automatic titration calibration device avoids the influence of manual operation, has an automatic titration calibration function and is good in repeatability.

The application relates to a method for smelting high-manganese steel in a converter, and belongs to the technical field of steelmaking. The technical problem to be solved by the application is that the manganese content of end-point molten steel produced by a converter in the prior art is low. The technical solution provided by the application for solving the above technical problem is that carbon balls and high-carbon ferromanganese are added in stages according to oxygen supply amount in the smelting process of the converter, when the oxygen supply amount is within 0-10% and 10-80%, 30% and 70% of manganese alloy are respectively added; and when the oxygen supply amount is within 0-10%, 10-50%, 50-80% and 80-100%, 20%, 40%, 30% and 10% of carbonaceous raw materials are respectively added. Compared with the current process for producing high-manganese steel in a converter, the application reduces the investment of alloy heating furnaces and other equipment, meets the production requirements of more varieties of high-manganese steel, improves the metal yield of manganese, shortens the production cycle, and reduces the production cost of high-manganese steel.

The invention relates to the technical field of metal material hot working, and discloses a hot-rolled coiled plate production process which comprises the following steps: preparing a reaction type protective agent, the high-temperature-resistant coating is prepared from the following raw materials in parts by weight: 20 to 40 parts of tetraethoxysilane, 5 to 15 parts of triethyl phosphate, 1 to 5 parts of triethyl borate, 0.5 to 2.0 parts of cerous nitrate (III) hexahydrate, 0.1 to 1.0 part of lithium acetate and 0.01 to 0.05 part of vanadyl acetylacetonate (IV). Coating the surface of a hot-rolled plate blank with the protective agent; the coated plate blank is heated in a heating furnace, so that the protective agent forms a molten-state protective layer in situ; carrying out hot rolling on the plate blank with the molten protective layer; and cooling and coiling the hot-rolled steel strip. In the whole heating and hot rolling process, the molten protective layer isolates the contact between the steel and the oxidizing atmosphere, so that the generation of oxide scales is fundamentally inhibited, the production process is simplified, and the metal yield is increased.

The utility model discloses a seawater concentration bromine extraction system based on deep waste heat recovery and new energy driving, and belongs to the technical field of salt chemical industry and new energy. On the basis of an existing seawater concentration bromine extraction system, a new energy mode is adopted for process heating, and heat exchange jackets are arranged on the outer walls of a sulfur combustion furnace 1 and a high-temperature SO2 flue 3; low-temperature air is sequentially fed into a heat exchange sleeve 26 and a heat exchange sleeve 20 through an air feeder 21 and exchanges heat with high-temperature and high-corrosion flue gas in a flue and higher-temperature flue gas in a sulfur combustion furnace, then the low-temperature air is fed into a miniature high-temperature waste heat hot water boiler 10, water is fed into a heating furnace, and cooled flue gas is subjected to circulating heat exchange through the air feeder 21. High-temperature water of the miniature high-temperature waste heat hot water boiler 10 is fed into the flash tank 23 and generates flash steam, and after the temperature of outlet water is reduced, the outlet water returns to the flash tank 23 for circulating heat exchange. Flash steam of the flash tank 23 is mixed with steam produced by the high-temperature heat pump steam producing device 37 and the new energy electric heating steam furnace 38, and then the mixture is sent to the liquid chlorine water bath 51 and the like for process heating.

The invention discloses a hot melting forming device and method for a synthetic quartz glass cylinder, through modular structural design, the synergistic effect of positioning, exhausting, pressing and forming is achieved, and the hot melting forming device for the synthetic quartz glass cylinder specifically comprises a graphite pressure head connecting rod, a graphite pressure head, a graphite center rod and a forming mold. According to the hot-melting forming method for the synthetic quartz glass cylinder, the device is adopted, a synthetic quartz glass ingot is pretreated, a low-impurity demolding material is laid during assembling, gradient heating is conducted on three temperature areas of a heating furnace, pressurization is conducted after softening, and then differential cooling is conducted, so that efficient preparation of the high-purity synthetic quartz glass cylinder is achieved; and the purity of the finished product meets the strict requirements of high-precision processes such as semiconductor wafer processing and thin film deposition on the material purity. According to the invention, the large-diameter and ultra-long synthetic quartz glass cylinder can be stably produced, the requirement of large-size development of semiconductor equipment is met, and the blank in the field of large-size high-purity quartz glass cylinder preparation in the prior art is filled.

The invention discloses a heating furnace group control system and method based on the Internet of Things, and relates to the technical field of industrial Internet of Things heating furnace control. The adaptive edge calculation module fuses algorithm processing data and reduces response delay; the dynamic thermal efficiency optimization module predicts and improves thermal efficiency; the digital twinborn decision support module realizes fault prediction; the collaborative energy scheduling module optimizes multi-furnace operation; the block chain security management module guarantees data security; and the cognitive interaction interface module realizes multi-modal interaction, and the system also comprises extension modules such as a multi-scale combustion optimization module and the like, so that accurate control and intelligent management are realized. According to the invention, accurate acquisition and real-time processing of multi-dimensional data of the heating furnace group are realized, the heat efficiency is improved, and energy consumption and emission are reduced; the system has the capabilities of fault prediction, cooperative scheduling and data security guarantee; and the man-machine interaction experience is improved, the production efficiency is improved, and intelligent upgrading of industrial heating is promoted.

The invention relates to the technical field of oil extraction and water reduction, in particular to an oil extraction and water reduction combined multi-source heating system which comprises an oil storage and water reduction separator, a liquid inlet is formed in one side of the top of the oil storage and water reduction separator, an exhaust port is formed in the middle of the top of the oil storage and water reduction separator, and a water outlet and an oil outlet are formed in one side of the bottom of the oil storage and water reduction separator. The oil storage and water reduction separator is used for receiving produced liquid with high water content in an oil well, removing a water phase and a gas phase through physical separation, outputting an intermediate oil phase with low water content to the heating furnace, and conveying the separated high-temperature water phase to the multi-source heat pump unit for heat recovery. Compared with the prior art, the oil storage and water reduction separator is arranged to be matched with the waste heat recovery multi-source heat exchange unit, most of water phases in produced liquid are rapidly removed, the follow-up treatment burden is relieved, the conveying efficiency is improved, multi-source cooperative energy supply is achieved, dependence on traditional fossil energy is reduced, and the energy utilization efficiency is improved; the environment-friendly property and the sustainability are good.

The invention discloses a surrounding furnace tea cooking device which can utilize a first heating body to radiate heat outwards to cook tea or cook a hot pot or bake food and the like, and can also utilize a hot air assembly to heat and utilize an atomization humidification assembly to humidify and reduce dryness. The air blower can accelerate flowing of air in the water tank, the pressure intensity in the water tank is increased, mist is blown out in the circumferential direction, the temperature of air on the circumferential side is increased, mist outlet is even, the coverage range is large, all users sitting on the periphery of the surrounding furnace table can be covered, and meanwhile flowing of air in the heat dissipation cavity can be accelerated through the air blower, and heat dissipation is conducted on the heating furnace assembly. No extra heat dissipation structure is needed, and the practicability is improved.

The invention relates to a high-temperature heating furnace temperature measurement system based on a temperature emissivity inversion algorithm, and belongs to the technical field of metallurgical industry temperature measurement. The system comprises a spectrum detection system, a master control upper computer and a temperature adjusting system, the spectrum detection system is used for acquiring a plurality of wavelengths and corresponding gray values of a melt in the heating furnace; the temperature adjusting system is used for adjusting the temperature of the heating furnace; the master control upper computer is used for receiving the wavelengths and the corresponding gray values obtained by the spectrum detection system to obtain the spectral radiation brightness corresponding to the wavelengths; obtaining the temperature of the melt in the heating furnace by using a free energy minimization temperature emissivity inversion method based on each wavelength and the corresponding spectral radiance; and the temperature adjusting system is controlled to adjust the temperature of the heating furnace based on the temperature of the melt in the heating furnace. Real-time and accurate temperature measurement of melts with different emissivity is realized, the production cost is reduced, and the temperature measurement precision is high.

The invention discloses a method for preparing tantalum carbide powder by carburization based on a double-effect synergistic effect of molten salt activation and catalytic decomposition, which comprises the following steps: mixing molten salt powder A and tantalum powder to obtain mixed powder, heating the mixed powder to 600-1200 DEG C for activating treatment to obtain activated tantalum powder, separately placing molten salt powder B and the activated tantalum powder in a heating furnace, heating the heating furnace to 100-200 DEG C, heating the heating furnace to 100-200 DEG C, and heating the heating furnace to 100-200 DEG C to obtain the tantalum carbide powder. The heating furnace is heated to enable the molten salt powder B to be converted into molten salt, then carbon source gas firstly flows through the molten salt to form active gas, the active gas makes contact with the activated tantalum powder to react, and the tantalum carbide powder is obtained. On one hand, the tantalum powder is subjected to surface activation treatment through the molten salt, and the reaction activity of the tantalum powder is improved; the molten salt medium assists in organic gas decomposition, the thermal decomposition efficiency of the organic gas is improved, the production energy consumption is effectively reduced under the cooperation of the molten salt auxiliary gas decomposition and the molten salt activation tantalum powder process, and the product purity and uniformity are improved.

The invention discloses a heating furnace control method and system based on expert control and a storage medium, and the method comprises the following steps: constructing an expert knowledge employing a generative rule to represent combustion control knowledge, and the rule form is IFlt; a precondition gt; tHNt, THNt, THNt; performing conclusion operation gt; the preconditions comprise a furnace temperature error range, a furnace pressure state, a flue gas temperature and a reversing period parameter, and the conclusion operation comprises gas flow adjustment, air-fuel ratio correction, and setting of a flue valve opening degree or a burner reversing period; dynamic parameter prediction and optimization: calculating a predicted temperature value under the current working condition based on a furnace temperature prediction model; performing multi-target collaborative reasoning: searching a matching rule set in a heuristic manner, and combining a Hash algorithm to quickly position a control conclusion; the optimized air-fuel ratio, reversing period and furnace pressure parameters are issued to a PLC, and an execution mechanism is driven to adjust the frequency of a gas valve, the frequency of an air valve and the frequency of a smoke exhaust fan; and self-learning and knowledge base updating: dynamically correcting the rule weight according to the historical control effect.

The invention relates to the technical field of medium manganese steel, in particular to high-strength and high-toughness medium manganese steel and a preparation method thereof.The preparation method is characterized by comprising the steps that S1, smelting is conducted through an electric furnace according to the chemical component ratio of the medium manganese steel, then refining is conducted through a ladle refining furnace, then vacuum degassing treatment is conducted through a vacuum circulation degassing method, and then continuous casting is conducted to form a plate blank with the thickness being 200-300 mm; s2, the plate blank is heated to 1150-1250 DEG C in a walking beam furnace, heat preservation is conducted for 2-4 hours, and then a controlled rolling technology is adopted to machine the plate blank into a steel plate within the range of 4-20 mm; s3, after rolling is completed, the steel plate is treated through a composite cooling technology of ultra-fast cooling and laminar cooling; s4, the cooled steel plate is heated to 750-850 DEG C, heat preservation is conducted for 10-60 minutes, and a ferrite and austenite double-phase structure is formed; the comprehensive performance is greatly improved, and excellent strength, plasticity, low-temperature toughness and welding adaptability are shown.

The invention belongs to the technical field of ironmaking and steelmaking, and particularly discloses a direct reduction iron production process and system of variable feed gas. The production process comprises the following steps: under a basic working condition, a hydrogen-rich working condition or an all-hydrogen working condition, introducing high-temperature reducing gas into a shaft furnace to produce the direct reduced iron; the production system comprises a shaft furnace, a self-heating modification device, an upgrading device, a heating furnace and a preheating furnace, and is provided with three hydrogen supplementing points and two hydrogenation points. By changing the structure of the raw material gas, supplementing hydrogen at three positions or supplementing or adding hydrogen at at least one of two hydrogenation points, increasing the H2 content of the reducing gas at the inlet of the shaft furnace and the like, the carbon emission, the process energy consumption and the pellet reduction difficulty are reduced.

According to the high-quality high-speed wire rolling method for the low-alloy high-speed steel wire rod based on continuous casting forming, gradient heating is conducted through the step type heating furnace, preheating of a continuous casting blank is uniform, and phase change stress is reduced. The initial rolling temperature is set and controlled to be 1060-1100 DEG C, the finish rolling temperature is controlled to be 950-1050 DEG C, the spinning temperature is controlled to be 980-1030 DEG C, and the highest rolling speed is 25 m / s. And after rough rolling, induction heating temperature compensation is carried out to increase the surface temperature of the blank, the temperature is set to be 1000-1040 DEG C, the temperature compensation time is controlled to be 10-20 s, and surface cracks and head wind caused by too low temperature are prevented. And closing the cover plate after spinning, adopting heat collection, immediately entering a slow cooling tunnel furnace for furnace cooling after doffing, and discharging for annealing after 48 hours or longer. A continuous casting technology is used for replacing a traditional die casting technology, controlled rolling and controlled cooling in the rolling process are matched, composition segregation is remarkably reduced, the core quality is improved, carbides are effectively refined, the uniformity of products is guaranteed, the production efficiency is improved, the production cost is reduced, and the influence on the environment is reduced; and a new process and a new route are provided for producing the high-quality low-alloy high-speed steel wire rod.

The invention relates to the technical field of floor slab concrete, and discloses aerated concrete applied to sound insulation and heat preservation of a floor slab and a preparation method of the aerated concrete aiming at the problems that an existing sound insulation floor slab containing the aerated concrete is poor in structural stability, namely the sound insulation effect and the long-term effect of mechanical properties are poor and the like. Comprising 30-40 parts of fly ash, 25-35 parts of sand, 15-20 parts of ardealite, 10-15 parts of quick lime, 5-8 parts of silicon-aluminum porous microspheres, 3-5 parts of slaked lime, 1-2 parts of Fe3O4-polypropylene fiber and 0.2-0.5 part of aluminum powder. The preparation method of the silicon-aluminum porous microspheres comprises the following steps: mixing a silicon source, an aluminum source and a surfactant, and uniformly stirring to obtain silicon-aluminum homogenate; and adding nano titanium dioxide, carrying out ultrasonic dispersion and freeze drying, transferring into a heating furnace, and heating and calcining to obtain the silicon-aluminum porous microspheres. The supporting and strengthening effects on pores are realized through gas production reaction and the like in the material, so that the structural strength and durability of the aerated concrete are improved.

The utility model discloses a high-temperature specific heat capacity tester which comprises a main control cabinet, a heating device, a connecting sleeve and a detection device, the heating device is fixedly installed on the detection device through the connecting sleeve, the detection device is fixedly installed on the main control cabinet, the heating device comprises an electric furnace, a test sample is hung in a heating hearth through a high-temperature-resistant wire to be heated, and the electric furnace is connected with the electric furnace. The detection device comprises an outer box body connected with the connecting sleeve, a constant-temperature heat insulation screen cover is installed in the outer box body, a temperature-controllable heat insulation screen cover is installed in the constant-temperature heat insulation screen cover through an insulation support, a heat measuring block is installed in the temperature-controllable heat insulation screen cover through an insulation support, and an electric heating tube and a thermocouple are arranged on the heat measuring block. A heating resistance wire is arranged on the side wall of the temperature-controllable heat insulation shield, a temperature difference thermopile is arranged between the heating resistance wire and the calorimetric block, and a copper pipe used for introducing constant-temperature hot water is wound on the side wall of the constant-temperature heat insulation shield. The high-temperature specific heat capacity tester disclosed by the utility model is high in measurement precision, simple to operate and small in size.

The invention relates to the technical field of aluminum alloy forging, in particular to a forging process capable of reducing reverse forging coarse grains of 6061 aluminum alloy, which comprises the following steps: acquiring a 6061 aluminum alloy ingot, homogenizing and annealing the 6061 aluminum alloy ingot at 480-520 DEG C for 12-16 hours, cooling to room temperature by water, performing ultrasonic flaw detection, performing turning surface treatment, and alternately forging and pressing in three directions, thereby obtaining the 6061 aluminum alloy. The method comprises the following steps: placing a fine-grain 6061 aluminum alloy forge piece in a graded heating furnace, completing sub-dynamic recrystallization, applying directional pressure stress of 50-80MPa to the 6061 aluminum alloy forge piece, analyzing grain boundary characteristic distribution by adopting an electron back scattering diffraction technology, and obtaining the grain boundary optimized 6061 aluminum alloy forge piece with a discontinuous coarse-grain structure through laser shock strengthening and stress relief annealing. According to the method, the problems that reverse forging coarse grains are caused by uneven strain distribution during forging and pressing, and fine grains and high-density nanoprecipitation cannot be effectively obtained and a grain boundary structure cannot be optimized due to the fact that follow-up forging, heat treatment and stress treatment parameters are difficult to accurately control can be solved.