950 results about "Hearth" patented technology

The invention relates to a boiler flue gas temperature dynamic compensation method based on CFD-reinforcement learning, and belongs to the technical field of boiler operation control. The method comprises the steps that boiler operation parameters and flue gas temperature data are collected in real time, a multi-scale coupling three-dimensional CFD model is constructed, a macroscopic gas-solid two-phase flow-combustion reaction-radiation heat transfer coupling algorithm and a microcosmic pulverized coal particle combustion dynamics algorithm are fused, and hearth and flue temperature distribution is simulated and output; building a CFD-reinforcement learning fusion agent based on a CFD model, taking similar working condition agent parameters as initial values, combining historical and virtual data staged training, and reinforcing the weight of a key temperature measurement point through a focusing regulation and control strategy; an echo state network-predictive control collaborative algorithm is adopted, real-time data are input to obtain an initial adjustment amount, and after security constraint optimization, a compensation execution mechanism is controlled to act. The flue gas temperature is accurately and dynamically compensated, the adaptability to complex working conditions is improved, and equipment safety and operation efficiency are both considered.

The invention relates to the technical field of solid waste incineration automatic control, and discloses a solid waste incineration equipment automatic control method and system.The method comprises the steps that real-time data of solid waste components in a hearth are collected, and an initial multi-dimensional parameter set is obtained through preprocessing; calculating a balance point of the heat value and the water content through fuzzy reasoning; when the balance point exceeds a threshold value, parameter interaction influence is predicted, and a multi-dimensional control vector is generated; performing data fusion and historical data matching in combination with real-time incineration process indexes to obtain an enhanced load distribution adjustment factor; carrying out weight comparison based on the adjustment factor and the balance point, judging a load balance influence index, and carrying out matching correction if the index exceeds a compatible threshold value; updating a load distribution scheme according to a correction result, and generating a final operation strategy; and a control instruction is sent through a feedback cycle mechanism and is continuously optimized, so that closed-loop control is realized. The device can adaptively treat dynamic changes of solid waste components, and the incineration efficiency and stability are improved.

The invention relates to the technical field of boiler temperature measurement, and discloses a boiler furnace temperature field measurement system based on multi-sensor fusion. According to a temperature acquisition module of the system, a plurality of groups of infrared temperature measurement sensors and thermocouple sensors are arranged in preset space grids of a boiler hearth, and real-time temperature data of each space grid are synchronously acquired; the data fusion module performs time alignment and space registration on the acquired data to generate a space-time synchronous original temperature data set; the noise suppression module performs multi-scale decomposition on an original data set based on wavelet transform, extracts a high-frequency noise component and performs adaptive filtering, and outputs a temperature data sequence after noise reduction; the temperature field reconstruction module reconstructs a hearth three-dimensional temperature field distribution model through a radial basis function interpolation algorithm according to the denoised data sequence; and the dynamic compensation module calculates the heat conduction lag compensation amount of the temperature field distribution model according to the flowing speed of the flue gas in the hearth and the working condition parameters of the combustor, and generates a compensated dynamic temperature field model.

The invention discloses a method and system for optimizing temperature uniformity of a hearth of a temperature isostatic pressing machine, and the method comprises the steps: arranging a plurality of layers of temperature measurement planes and a temperature monitoring network in the hearth, collecting all-region temperature data in real time, calculating three-dimensional temperature field distribution and uniformity indexes, generating a heater power regulation and control instruction in combination with the indexes, and controlling the temperature uniformity of the hearth of the temperature isostatic pressing machine. And dynamically adjusting the output power of the partitioned independent controllable heater array. According to the method, the whole area of a hearth is covered through multi-layer temperature measurement, temperature uniformity is evaluated through quantitative indexes, prospective power compensation is achieved with the help of a predictive control algorithm, control parameters are optimized through a thermodynamic simulation model, the problems that a traditional temperature isostatic pressing machine is incomplete in temperature monitoring and poor in heating regulation and control pertinence are solved, and the temperature isostatic pressing efficiency is improved. And the temperature uniformity of the hearth is greatly improved, the heating consistency of workpieces is guaranteed, and the device is suitable for a warm isostatic pressing machining scene of high-precision material forming.

The invention provides an SNCR (selective non-catalytic reduction) intelligent denitration system based on a sound sensing technology, and relates to the technical field of flue gas denitration. The hearth temperature calculation module sequentially sounds and receives the multiple sound wave signal flows, multiple hearth path temperatures are obtained through calculation and uploaded to the central processing unit through the temperature field reconstruction module, and a hearth combustion temperature field graph is generated through calculation; the denitration strategy control module is used for matching and analyzing a denitration strategy according to the hearth combustion temperature field graph and determining target denitration control strategy parameters; and the feedback optimization module adopts the parameters to execute denitration control operation, and regulates and updates target denitration control strategy parameters according to the denitration effect. The technical problem that SNCR denitration control is difficult to accurately match with the optimal reaction zone due to low temperature measurement means precision and insufficient spatial resolution in the prior art is solved, the SNCR denitration efficiency is improved, and ammonia escape is reduced.

The invention provides a multi-interlayer energy-saving hearth used on a gas stove. In the prior art, a single-layer gas control basin or a welded double-layer gas control basin is used for improving the detection thermal efficiency, but the thermal insulation performance is poor, more heat is lost, and the thermal efficiency is reduced. The multi-interlayer energy-saving hearth comprises an outer hearth and an inner hearth, the outer hearth is in a big-end-up round sleeve shape, the outer hearth is arranged outside a burner of the gas stove in a sleeving mode, the bottom face of the outer hearth is placed on the stove face of the gas stove to be in a closed state, an outer hearth boss is machined on the upper portion of the interior of the outer hearth, and a plurality of outer hearth air inlet holes are evenly distributed in the lower face of the outer hearth along the circumference; the appearance of the inner chamber is in a basin shape with an inner chamber hole in the center, the inner chamber is arranged in the outer chamber, the periphery of the inner chamber is placed on the outer chamber boss, the inner chamber hole is close to the burner and is flanged upwards, and a gap between the inner chamber hole and the burner is used as an outer air supplement port for secondary air; and the pot rack consists of a pot rack ring and a plurality of pot rack legs and is arranged on the upper edge of the outer chamber. Through multi-aspect improvement, the thermal insulation performance and heat recovery are improved, the thermal efficiency is higher than that of various existing gas stoves, and the gas stove is easy to detach and wash.

The invention provides a method for detecting the furnace temperature uniformity of a roller hearth type heat treatment furnace. The method is applied to a roller hearth type heat treatment furnace system comprising a furnace body, a heating device, a temperature sensor array and a medical service big data management system. The method comprises the steps that a temperature sensor array containing 14 measuring points is arranged at a specific position of a furnace body, and a furnace temperature data recording black box is fixed to the lower right corner of the furnace body; controlling the heating device to heat to a target process temperature of 920 DEG C and keeping the temperature constant for 30 minutes; the temperature data of the whole furnace area is collected every five minutes; and calculating a reference temperature and an absolute deviation value set of each measurement point through a medical service big data system, and evaluating the temperature field uniformity of the furnace body. And when the deviation exceeds a threshold value, the system generates a correction parameter group containing a heating zone power compensation coefficient and a refractory material density gradient value, and executes power redistribution or thermal insulation layer enhancement operation. High-precision detection and dynamic optimization of the temperature field uniformity of the roller hearth type heat treatment furnace can be realized, and the stability of a heat treatment process and the consistency of product quality are improved.

The embodiment of the invention discloses an efficient SNCR control method, and relates to the technical field of SNCR denitration. The efficient SNCR control method is used for the SNCR denitration system of the boiler, a hearth of the boiler is divided into a plurality of subareas in the horizontal direction, multiple layers of spray guns are arranged in each subarea in the height direction of the hearth, and the method comprises the steps that the boiler load during operation, the boiler outlet smoke water content and the smoke temperature of each subarea of the layer where a temperature measuring device is located are obtained; according to the boiler load, the boiler outlet flue gas moisture content and the flue gas temperature of each subarea of the layer where the temperature measuring device is located, the flue gas temperature of each spray gun is calculated in real time through a pre-established three-dimensional temperature field calculation model; according to the flue gas temperature of each spray gun, the spray gun in the optimal denitration reaction temperature interval is selected in each subarea; and the spray gun selected in each zone is controlled to be put into operation. According to the invention, the problem of low NOx removal efficiency or high NH3 escape in different hearth areas can be solved.

The invention relates to the technical field of Isa furnace metal smelting processes, in particular to a numerical simulation method and system for reaction of pulverized coal at the upper part of a hearth of an Isa furnace and monitoring of flue gas components at an outlet, which are based on reasonable basic assumption and in combination with field parameters, construct a simulation equation and perform parameter coupling on a control equation in the simulation process. The physical quantity field distribution in the hearth in the metal smelting process of the Isa furnace can be subjected to accurate numerical simulation, the obtained data is matched with the actual production data, the corresponding production rule can be obtained, and the method has important guiding significance for controlling the coal consumption of the Isa furnace and the flue gas components at the outlet; besides, the numerical simulation method for monitoring the pulverized coal reaction at the upper part of the hearth of the Isa furnace and the flue gas components at the outlet and the corresponding data can be used as a basic support for intelligent feeding or other related parameter management and control in the metal smelting process, so that more accurate management and control in the smelting production link of the Isa furnace can be realized; and the effects of reducing cost and increasing efficiency are achieved.

The invention discloses reflow soldering equipment and process for SMT patch production. The reflow soldering equipment comprises a furnace body base, a conveying unit, a hearth and a sealing top cover. A conveying unit is horizontally laid on the furnace body base, the hearth is installed on the upper end face of the furnace body base in a sealed mode, and the interior of the hearth is evenly divided into three independent working areas which are the preheating area, the backflow area and the cooling area in sequence from left to right. A visual inspection chamber is installed at the position, located at the feeding end of the hearth, of the upper portion of the furnace body base. A heating device is arranged in each working area of the hearth; in the heating device of the backflow area, each microplate is slidably provided with a vertically arranged hot spray pipe, and the hot spray pipes can perform hot air pulse direct blowing on large-size surface-mounted elements on a PCB, directly heat pin welding spots, realize micro-swing attachment of the elements in cooperation with surface tension of solder paste, and eliminate mechanical stress when the chip mounter is placed.

The application discloses a movable furnace hearth with an accelerated heating function and belongs to the technical field of a blast furnace hearth. The movable furnace hearth comprises a furnace hearth body, a moving base, a movable wheel with adjustable start and stop, a ventilation seat, a height-adjustable heating and cleaning integrated assembly, a multi-section hollow pipeline, a winding mechanism and a hammering, piercing and fire spraying integrated assembly. The moving base is fixedly arranged at the bottom of the furnace hearth body. The movable wheel with adjustable start and stop is fixedly installed on the outer side of the moving base in a ring array distribution mode. The ventilation seat is welded on the outer wall of one side of the bottom of the furnace hearth body. The multi-section hollow pipeline is fixedly installed at the center position of the bottom of the inner cavity of the furnace hearth body. The height-adjustable heating and cleaning integrated assembly is fixedly installed on the top of the multi-section hollow pipeline. The winding mechanism is arranged on the top of the height-adjustable heating and cleaning integrated assembly. The application has the advantages of convenience in movement, uniform heating effect, fast heating speed, convenience in internal impurity crushing and cleaning and suitability for promotion and use.

The utility model provides an anti-splashing auxiliary material adding guide device for a vacuum melting furnace, which belongs to the technical field of vacuum melting furnaces and comprises an auxiliary material storage bin fixed in an inner cavity of a furnace body, a blanking port extending to a hearth is arranged at the bottom of the auxiliary material storage bin, an inner cavity of the blanking port is provided with an auxiliary material adding channel extending to a position above a crucible, and the auxiliary material adding channel is communicated with the auxiliary material storage bin. The auxiliary material adding channel is arranged on the inner wall of the discharging opening in a sliding mode through a follow-up sealing assembly, the outer wall of the discharging end of the auxiliary material adding channel is connected with a splash-proof top block used for covering the top of the crucible in a sleeved mode, and the auxiliary material adding channel is a pipe-shaped piece. In the process, the multi-stage telescopic cover gradually covers the top of the crucible opening along with the splash-proof top baffle, it is guaranteed that the top of the crucible can be completely covered in the whole process, and splashing in the auxiliary material feeding process is avoided.

The utility model discloses a zinc impregnation furnace with a multipoint temperature acquisition wireless transmission and temperature control device, which is characterized in that a plurality of independently controlled heating devices are arranged in a hearth of the zinc impregnation furnace along the length direction, a furnace core is provided with a plurality of heating sections, a multipoint temperature measuring thermocouple is arranged in the furnace core, and each temperature measuring point corresponds to one heating section; the multi-point temperature measuring thermocouple is connected with the wireless transmitter, a wireless receiver, a signal distributor, a PIC controller and a heating device controller are arranged in the control cabinet, a temperature display instrument is arranged on the control cabinet, the wireless receiver is connected with the signal distributor, the signal distributor is connected with the PIC controller and the heating device controller, and the heating device controller is electrically connected with the heating device. The plurality of temperature measuring points are arranged in the furnace core, the temperature measuring points are used for measuring the temperature of the heating section, and the heating device controller is used for timely controlling and adjusting the working state of the heating device according to the measured temperature, so that the temperature in the furnace core is uniform, and the zinc impregnation quality of a workpiece is improved.

The application discloses a double-hearth two-stage heating vacuum distillation furnace, which comprises an evaporation furnace and a condensation furnace which are communicated through a gas passage, wherein the evaporation furnace comprises an evaporation furnace body and at least one top heating mechanism which is detachably arranged on the top of the evaporation furnace body; and the condensation furnace comprises a condensation furnace body, a side heating structure and a furnace cover, wherein the condensation furnace body is divided into a temperature control condensation chamber and a plurality of layers of multistage condensation chambers, and the gas passage can be combined or replaced according to the required reaction conditions of different materials. The vacuum distillation furnace can collect different metals through the gradient change of the temperature of the two hearths, reduces the process of secondary distillation of volatile matters after the furnace is stopped, can complete the processing of diversified raw materials, improves the work efficiency and reduces the processing cost; the modular top heating mode directly radiates heat to the materials, improves the heat utilization rate, can realize the working mode of stopping the furnace without stopping the work, helps to improve the work efficiency, and is convenient for completing the furnace cleaning, maintenance and solid material taking and placing.

The invention provides a top-spraying feeding type high-temperature activation furnace and a control method thereof.The activation furnace comprises a vertical furnace body, and a fuel nozzle, a first combustion-supporting air nozzle, a cooling liquid nozzle and a cold air nozzle are sequentially arranged on a first section, a second section, a third section and a fourth section in a hearth of the vertical furnace body from top to bottom; a reduction gasification area, a peroxidation combustion area, a primary cooling area and a secondary cooling area are sequentially defined in the hearth so as to control the temperature in different areas; the fuel nozzles are arranged in pairs and arranged around the center circle of the hearth in a symmetrical tangent circle opposite spraying mode so that opposite flow can generate turbulent disturbance in the center area of the hearth to establish a first swirling flow field, and a feeding nozzle is arranged on the furnace top of the vertical furnace body to be communicated with the hearth and spray materials towards the first swirling flow field to form top combustion. Therefore, the high-temperature activation treatment of the livestock and poultry excrement is realized.

The invention provides an iterative optimization method and system for the optimal hearth target temperature of a sintering ignition furnace and a storage medium, and the method comprises the steps: obtaining real-time working condition data in a stable operation state, judging an ignition state through an ignition effect prediction model, taking the current hearth temperature as a starting point, carrying out the iterative optimization in a gradual cooling mode when the state is normal, and obtaining the optimal hearth target temperature of the sintering ignition furnace. The state is evaluated again after the target temperature is slightly reduced and stable operation is carried out every time, iteration is continued if the ignition state is kept normal, stopping is immediately carried out if underburning is detected, the previous normal temperature is determined as the critical lowest safety temperature, and finally the optimal target temperature considering energy conservation and quality is obtained by increasing the safety margin. And long-term operation parameters are set. The intelligent closed-loop optimization of the sintering ignition process is realized, the energy consumption is obviously reduced on the premise of ensuring the sintering quality, the optimal balance of the quality and the energy consumption is realized, and the intelligent closed-loop optimization method has the capabilities of automatic triggering, automatic iteration, automatic judgment and automatic setting.

The purpose of the present invention is to propose a method for flattening annealing a grain-oriented electromagnetic steel sheet and a method for producing a grain-oriented electromagnetic steel sheet in which slip between a grain-oriented electromagnetic steel sheet and hearth rolls is suppressed in flattening annealing. In this method for flattening annealing a grain-oriented electromagnetic steel sheet, one or more ceramic hearth rolls are arranged as hearth rolls for transporting the grain-oriented electromagnetic steel sheet in an annealing furnace, and when controlling an optimum forward slip rate in the ceramic hearth rolls, the optimum forward slip rate is determined by subtracting the hearth roll thermal elongation rate from the steel sheet thermal elongation rate or by subtracting the hearth roll thermal elongation rate from the steel sheet thermal elongation rate and adding a drive droop deceleration rate. The method for producing a grain-oriented electromagnetic steel sheet includes a flattening annealing step in which the optimum forward slip rate of the hearth rolls is controlled so that the slip rate between the hearth rolls and the grain-oriented electromagnetic steel sheet is equal to or less than a predetermined threshold value.

The invention relates to the technical field of vacuum brazing furnace temperature control, and discloses a vacuum brazing uniform heating and cooling system with multi-temperature-zone cooperative control. According to the system, a temperature deviation trend spectrum is generated by matching a multi-zone actual temperature curve with a workpiece target temperature curve, multi-temperature-zone energy dynamic rebalance is started accordingly, and a preliminary power scheduling atlas and collaborative cooling trigger nodes are generated. And then heat flow disturbance compensation amount caused by heat radiation of the hearth is calculated and integrated with the atlas and the nodes to form a unified final process control atlas, and the atlas comprises heating correction and cooling scheduling instructions at the same time. Predictive regulation and control of the furnace temperature change trend and active compensation of temperature interval thermal disturbance can be achieved, the heating process and the cooling process are highly coordinated, and the temperature uniformity and the process consistency of a large or complex workpiece in the brazing process are improved.

The invention discloses a hearth flue gas velocity field measurement method and system based on a multi-layer sonic sensor, and the method comprises the steps: obtaining the sound wave propagation time when a sound wave reaches other sonic sensors after the sound wave is transmitted each time according to the multi-layer sonic sensor; different two-dimensional plane temperature fields are formed based on sound wave propagation time obtained by the same-layer sound wave sensors; according to different two-dimensional plane temperature fields, performing estimation by combining a correlation analysis method and a linear interpolation method to obtain three-dimensional hearth temperature field distribution; constructing a solving equation based on the three-dimensional hearth temperature field distribution, the acoustic wave propagation time and propagation path from the lower acoustic wave sensor to the upper acoustic wave sensor, and a preset flue gas velocity field; and solving the solving equation, outputting unknown parameters in the flue gas velocity field, and reconstructing full-field velocity distribution according to a preset flue gas velocity field formula. According to the method, no hardware cost is increased, the velocity field in the vertical direction of the hearth smoke is accurately measured, and key data support is provided for combustion optimization and intelligent monitoring of a power plant.

The invention relates to the technical field of high-temperature experimental equipment, in particular to a monitoring system for a high-temperature corrosion test of a tubular furnace. Comprising the following steps: a heating unit is mounted in a ceramic fiber hearth to perform high-temperature heating on a tubular furnace; the image acquisition unit is provided with an observation window for forming a gradient heat resistance mechanism, and penetrates into a hearth to record a surface image of an object to be detected in the furnace at high temperature in real time; the cooling unit comprises a circulating water pipeline which penetrates into the image acquisition unit to reduce the temperature and improve the image acquisition definition; the main control unit is connected with the heating unit and the temperature acquisition unit so as to regulate and control the test environment temperature; and extracting local features of the corrosion morphology based on the recorded surface image of the to-be-detected object, and matching the local features with a pre-established database to obtain a matching result. Through innovative structural design and intelligent control of the image acquisition unit and the cooling unit, visualization of the corrosion process, monitoring precision and analysis automation are realized.

The invention discloses a gas furnace fly ash co-processing method and system, and belongs to the technical field of solid waste disposal. The method comprises the following steps: S1, grinding raw coal and water to obtain coal water slurry; s2, mixing the coal water slurry and the fly ash to obtain mixed slurry; wherein the water content of the mixed slurry does not exceed 55%, and the wet basis heat value is greater than 2800kcal / kg, so that the mixed slurry can realize self-sustaining combustion after being fed into the furnace; s3, the mixed slurry enters a hearth to be combusted; and S4, high-temperature flue gas generated by combustion enters the next procedure for heat exchange. According to the fly ash co-processing method, on one hand, heat generated by combustion of the coal water slurry can be utilized for heat tracing of the fly ash, so that combustion of the fly ash is achieved, and extra energy consumption is not needed; and on the other hand, the fine fly ash and the coal water slurry are mixed to obtain slurry with certain viscosity, so that the fine fly ash can be effectively prevented from being carried by the airflow and quickly passing through the hearth, the retention time of the fly ash in the hearth is prolonged, and the fly ash is combusted more sufficiently.

The invention provides a blast furnace hearth erosion detection method, equipment and a device thereof.The blast furnace hearth erosion detection method comprises the steps that temperature data of a blast furnace thermocouple and parameter data of a blast furnace hearth are obtained, and the wave velocity of ultrasonic waves in the blast furnace hearth in the blast furnace erosion state is calculated according to the temperature data and the parameter data; according to the rotation time and the wave velocity of the ultrasonic waves in the blast furnace hearth, the measured carbon brick residual thickness of the blast furnace hearth is obtained through calculation; obtaining a theoretical carbon brick residual thickness based on a heat flux conservation principle and temperature data inversion; the carbon brick residual thickness and the theoretical carbon brick residual thickness are measured through ultrasonic waves and analyzed to obtain a residual thickness difference value, and the blast furnace hearth condition is judged according to the residual thickness difference value. According to the embodiment of the invention, the erosion degree of the carbon brick is accurately reflected by measuring the residual thickness of the carbon brick and the theoretical residual thickness of the carbon brick, so that measures beneficial to the safety of the hearth are guided, the burning-through risk of the hearth is reduced, a scientific theoretical basis is provided for prolonging the service life of a blast furnace, and the method has a wide application prospect.

The invention relates to the technical field of direct-current combustors. The direct-current burner comprises a nozzle body arranged at the corresponding corner of a boiler hearth, a spray head arranged at an air outlet of the nozzle body and a blade window separation mechanism, an elbow is arranged in the middle of the nozzle body, primary inertial concentration is carried out when pulverized coal airflow passes through, and the concentration a of the fire-facing side is improved; the blade window separation mechanism is arranged in the spray head, and secondary adjustable concentration is carried out when pulverized coal airflow passes through the blade window separation mechanism. When the boiler is in a low-load operation state, the elbow can enable coarse particle pulverized coal with the particle size larger than 50 micrometers to be enriched in a wall-attached mode, high-concentration wall-attached flow with the thickness larger than or equal to 50 mm is formed, and the concentration is 80%-100% higher than that of main flow; the stable combustion of the boiler in a rated load range of 15%-100% can be realized through the adjustment of the control piece; and when the load is low (less than or equal to 30% of rated load), the smoke temperature at the outlet of the hearth is increased by 30-50 DEG C, the ignition condition is improved, the smoke temperature at the inlet of the SCR denitration system is maintained to be more than or equal to 300 DEG C, and the NOx emission concentration is controlled to be below 50mg / m.

The invention discloses a heating furnace operation data analysis and fault prediction method and system, and particularly relates to the technical field of fault prediction. The method comprises the following steps: analyzing correlation characteristics of nozzle state fluctuation and fuel non-uniform mixing through nozzle state parameters and fuel flow data of a heating furnace, and extracting a fuel distribution non-uniformity index; based on the hearth temperature field infrared thermal imaging data, the drift trajectory of the hot spot is identified, and a hot spot drift rate and direction prediction result is obtained; calculating a local overheating risk probability by combining a fuel distribution non-uniformity index, constructing a heating furnace risk grade map, identifying a high-risk region, matching an abnormal working condition type by combining a historical fault database, and generating a fault early warning instruction including hot drift path prediction; and according to the fault early warning instruction, the fuel injection pressure and the nozzle opening degree of the fault nozzle are adjusted in real time, effective identification and risk assessment of the hot spot drift trend are achieved, and the fault prediction precision and the response timeliness of the heating furnace are improved.

The invention provides a hollow pipe fitting forming device and method. The hollow pipe fitting forming device comprises a heating mechanism, a bulging quenching mold and an air source mechanism. The heating mechanism comprises a roller hearth furnace provided with a conveying roller way, a furnace body is sequentially provided with a feeding isolation chamber, a heating chamber and a discharging isolation chamber in the length direction, all the chambers are isolated from one another and communicated with a protective atmosphere system, and the chambers are used for introducing dry air or inert gas into the furnace body and maintaining the dew point temperature below-15 DEG C; hydrogen adsorption on the surface of the hollow pipe blank is effectively inhibited, and the hydrogen embrittlement risk is reduced. After a pipe blank is heated at a high temperature, austenitizing of a material structure is achieved, then the pipe blank is rapidly transferred to a bulging quenching die, gas expansion deformation occurs in a die cavity under the action of set air pressure, the hollow pipe fitting is formed by attaching the die wall, meanwhile, the hollow pipe fitting attached to the die cavity is synchronously cooled through a cooling assembly in the die, and quenching treatment is achieved. The material structure is converted into martensite, and the mechanical property of a formed part is improved.

A method for extracting iron from copper tailings belongs to the field of copper tailings recovery treatment, and comprises the following steps: step 1, collecting copper tailings and crushing; step 2, adding a reducing agent and an auxiliary agent into the copper tailing powder crushed in the step 1, and fully mixing; (3) feeding the mixed material obtained in the step (2) into a sealed kiln for sealed reduction; fourthly, after reduction operation in the third step is completed, the mixed material is taken out and smashed again; fifthly, the mixed materials smashed in the fourth step are subjected to magnetic separation, and iron powder is obtained; and 6, residual substances obtained after magnetic separation in the step 5 are recycled. Compared with a traditional melting smelting mode, the low-temperature reduction mode is low in temperature, so that generated iron powder and slag can be kept in a solid state in the reduction process, the ring forming problem easily occurring in sealed kiln melting reduction and the defect that a rotary hearth furnace is difficult to discharge are overcome, energy consumption is reduced, and production efficiency is improved.

The invention discloses asphalt concrete recycled material recycling equipment, which belongs to the technical field of asphalt concrete milling material processing and comprises feeding equipment, heating equipment and metering and stirring equipment. The heating equipment comprises a recycled material regeneration heating roller, a combustor and a low-temperature hearth, the feeding equipment is located at the input end of the recycled material regeneration heating roller, and the output end of the recycled material regeneration heating roller is communicated with the combustor through the low-temperature hearth. The feeding direction of the reclaimed material is opposite to the flame direction of the combustor, and the combustor and the reclaimed material regeneration heating roller are transited through the low-temperature hearth, so that direct contact between the reclaimed material and high-temperature flame is avoided. Low-temperature airflow is conveyed to the inner barrel through the backflow cavity, so that the outlet temperature of the low-temperature hearth is kept in a low-temperature state of about 600 DEG C. The recycled material is gradually heated in the recycled material regeneration heating roller, so that the recycled material and asphalt are prevented from being overheated and aged, the heating efficiency is higher, and the heat utilization is more sufficient.

The invention belongs to the technical field of forge piece heat treatment, and relates to a heat treatment method for stable control over the structure performance of Ti55531 titanium alloy. The method comprises the steps that the furnace temperature is increased to T beta-30-60 DEG C, after the temperature is reached, a forged piece obtained after rough machining is loaded into an effective area of a hearth, when the furnace temperature is recovered and stabilized to T beta-30-60 DEG C, the heat preservation time starts to be calculated, and the heat preservation time is calculated according to the sum of through heating time and solid solution heat preservation time; when the heat preservation time of the forge piece reaches the set solid solution heat preservation time, the solid solution procedure is completed, and the forge piece is discharged out of the furnace and air-cooled until the forge piece is thoroughly cooled to the room temperature; the furnace temperature is increased to 600-630 DEG C, the forge piece is loaded into an effective area of a hearth when the temperature is reached, and when the furnace temperature is recovered and stabilized to the set temperature of 600-630 DEG C, aging heat preservation is conducted; and when the heat preservation time of the forge piece reaches the set time, finishing the aging process, and discharging for air cooling to finish the heat treatment process.

The invention relates to a partitioned charging and discharging method for a roller hearth quenching furnace, belongs to the technical field of plate heat treatment, and solves the problem of low application efficiency of a roller hearth furnace in the prior art. A roller hearth type quenching furnace partitioned charging and discharging method comprises the steps that S1, virtual partitioning is conducted according to the physical partitioning size of a roller hearth furnace and the type of a plate to be produced; according to the sequence of the virtual partitions, plate material preparation is carried out in sequence, and the real length of each virtual partition is obtained through calibration; s2, after plate feeding is completed, driving motors of the roller hearth furnace and the charging roller bed operate at the same time, and the aluminum alloy plate is driven to enter the furnace to be heated; and S3, after the plates are fed into the furnace and heated through the roller hearth type quenching furnace, the plates in the multiple subareas are sequentially discharged out of the furnace according to the heating time needed by the plates in the subareas. Reasonable partition and sequential charging and discharging of the plates are achieved, and the use efficiency of the roller hearth furnace is improved.

The invention discloses a mounting method of an engineering blackbody element in an industrial heating furnace, which comprises the following steps: three positioning holes are symmetrically formed in an element mounting surface in a triangular shape, a semicircular diversion trench is formed between every two adjacent positioning holes, and the mounting surface is subjected to sand blasting treatment; manufacturing a positioning gasket according to the curvature of the inner wall of the hearth, wherein the positioning gasket is arranged between the element mounting surface and the inner wall of the hearth; coating or spraying a high-temperature-resistant permeation type adhesive on the element mounting surface and the inner wall of the hearth, adhering the element to the inner wall of the hearth, and screwing the element on the inner wall of the hearth by adopting a screw through a positioning hole and a positioning gasket; high-temperature-resistant fastening screws are evenly distributed on the periphery of the element and vertically screwed into refractory bricks or concrete base materials on the inner wall of a hearth to lock the position of the element. According to the method, the defects of traditional engineering black body element installation are overcome, high-strength, long-acting and stable connection between the engineering black body element and the inner wall of the hearth is achieved, the problem that the element is prone to displacement and falling off under the high-temperature working condition is effectively solved, and the continuous effectiveness of kiln energy-saving transformation is guaranteed.