440 results about "Furnace temperature" patented technology

The invention relates to the technical field of boiler control, and discloses a gas-fired boiler starting control method and system. The method comprises the following steps: acquiring initial operation parameters such as hearth pressure, water inlet temperature, flue gas oxygen content and fuel valve opening of the gas-fired boiler, establishing a thermodynamic state model in a starting stage according to the initial operation parameters, and dividing dynamic response thresholds of different load intervals; and calculating a theoretical fuel supply rate of the combustor based on the model, generating and dynamically updating a fuel supply correction coefficient in combination with a threshold value, synchronously marking key nodes according to abnormal distribution of hearth temperature, and adjusting a spatial air distribution strategy of the combustor. And after the correction coefficient is subjected to multi-stage buffer smoothing, a fuel control instruction is output to an executing mechanism. And switching to steady state control after the boiler reaches the preset load. The method adapts to the characteristics of a power plant unit, so that the starting process is more stable, the damage to a heated surface and pollutant emission are reduced, and rapid grid connection is assisted.

The automatic soot blowing furnace comprises a furnace body, a conveying device is arranged outside the furnace body, the conveying device is used for conveying a cupel into the furnace body, and a furnace door capable of being automatically opened and closed is arranged on the furnace body; and an endoscopic camera is arranged in the furnace body and is used for monitoring a soot blowing end point. The device can control the cupel to automatically enter and exit from the hearth, frequent door opening and closing are not needed, the temperature in the furnace is stable, energy consumption loss is reduced, harmful gas emission is reduced, and cost reduction and efficiency improvement are facilitated; image data are acquired by adopting a light supplementing lamp and an endoscopic camera, so that the method is more reliable and accurate; and the cupel subjected to soot blowing is taken out in time through the material taking module, the loss of metal silver is reduced, and the extraction content is increased. Due to feeding and discharging of the cupel, automatic operation is achieved, the working efficiency is improved by 50%, and the cupel can be in butt joint with full-automatic equipment.

The invention provides an intelligent temperature control method and system for relieving stress of a glass annealing kiln. The method comprises the following steps: transmitting acoustic surface waves through a distributed sonic sensor to collect stress propagation data in glass, decoupling coupling characteristics of sound velocity and temperature, extracting a relaxation time constant, and generating a stress relaxation rate; performing time difference cross-correlation analysis to construct a stress propagation three-dimensional gradient field, establishing an incidence relation between the relaxation rate and the gradient field, and constructing a mapping strategy of the temperature set value and the relaxation rate according to the incidence relation; generating a dynamic temperature adjusting parameter and converting the dynamic temperature adjusting parameter into a heater power control signal; and dynamically adjusting a stress data feature extraction rule to match a real-time stress state according to the relevance between the gradient field update frequency and the temperature adjustment rate. According to the application, dynamic mutual optimization of the annealing stress elimination efficiency and the kiln temperature setting precision is realized, the glass residual stress is reduced, and the hidden danger of plate explosion is eliminated.

The invention is suitable for the technical field of automatic control, and provides an MPC heating furnace oxygen-enriched combustion control system parameter optimization method based on reinforcement learning, which comprises the following steps: step 1, production line data is acquired, and the acquisition of the production line data is mainly to acquire real data of an actual cement production control production line, including MV, OV and DV data; and step 2, obtaining a state space model, the obtaining of the state space model comprising establishing a model of converting a first-order transfer function into a state space, the MPC parameter adjustment is performed by using the prominent learning ability and adaptive ability of a reinforcement learning (RL) method, the dynamic adjustment according to the change of the system can be realized, and the control accuracy of the system is improved. And training the current oxygen-enriched combustion control algorithm according to the state information under the existing decision-making condition so as to output the expected furnace temperature, and evaluating the effectiveness of the control algorithm through the prepared evaluation standard.

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 belongs to the technical field of electric furnace temperature monitoring, and particularly discloses a distributed optical fiber temperature measurement calibration and early warning method avoiding interference of an electric furnace cooling pipe. The influence of the cooling pipe on the temperature sensing point is quantified according to the heat flux density ratio between the temperature sensing point and the cooling pipe, and the interfered temperature sensing point is screened based on the influence; the fitting temperature of the interfered temperature sensing point is corrected based on heat conduction loss or flow deviation of the cooling pipe; identifying peak temperature sensing points, and removing temperature sensing points with the gradient of the peripheral thermal field lower than a peak threshold in the heat affected area of the cooling pipe; performing early warning judgment based on the temperature rise rate of the peak temperature sensing point and a dynamic early warning threshold value; noise data in early warning judgment is eliminated based on the simulated heating rate; and finally, a temperature change curve of each temperature sensing point is smoothed based on the heat flow conservation constraint of the thermal field. According to the method, accurate monitoring of the electric furnace temperature under the influence of the electric furnace cooling pipe is achieved, and powerful support is provided for efficient production and safe operation of the electric furnace.

The invention relates to the technical field of acoustic measurement, in particular to a hearth temperature field intelligent visualization system based on an acoustic sensing technology. Comprising an array type sound sensing data acquisition unit; a working condition adaptive inversion unit; a three-dimensional temperature field intelligent visualization unit; and a working condition early warning and interaction unit. The method comprises the following steps: receiving sound wave data, working condition parameters and a corrected temperature field, extracting sound wave frequency-amplitude features, working condition mean values and fluctuation features in a branched manner, and dynamically distributing attention weights according to feature credibility to obtain fusion features; fusion features are input into an inversion model to obtain a current temperature field, the actually measured temperature of the thermocouple is used as a reference to calculate errors, regularization coefficients which are negatively correlated with the errors and the number of iterations are adopted to optimize, the errors are disassembled to adjust related parameters, working condition changes can be adapted without manual intervention, and system automation and long-term operation reliability are improved.

The invention relates to the technical field of furnace temperature control, and discloses a furnace temperature intelligent control device and method, and the device comprises a multi-source sensing temperature field construction module, a thermal state process inversion module, a target temperature field mapping generation module, a multi-target dynamic optimization module, a control instruction resolving mapping module, and a rolling execution optimization module. Interpolating the multi-source heterogeneous sensing data to obtain a three-dimensional thermal temperature field; performing inversion on the three-dimensional thermal temperature field to obtain a current material reaction process state; mapping to a preset process knowledge graph to obtain a target temperature reference and a distribution rule so as to construct target temperature field distribution; solving by combining thermodynamics-heat transfer constraints of the furnace to obtain a global optimal dynamic transition trajectory; mapping the global optimal dynamic transition trajectory to obtain an accurate energy input instruction set; fusing newly acquired real-time data to update three-dimensional temperature field distribution, and reconstructing a track to obtain an updated control strategy; according to the invention, the accuracy of intelligent control of the temperature of the furnace can be improved.

The invention provides an all-hydrogen bell type annealing furnace temperature-atmosphere-time dynamic matching method based on an NSGA-II algorithm, and belongs to the field of metallurgical treatment and intelligent manufacturing control. A multi-objective optimization model with maximization of surface quality and minimization of energy consumption and annealing time as objectives is constructed, a control system of a temperature curve, hydrogen concentration and time distribution is established, and constraint conditions such as thermal stress, safety concentration and temperature are applied. An NSGA-II algorithm is combined with a simulated binary crossover, variation and elitism strategy, Pareto optimal solution search is realized based on an energy consumption model and a surface quality evaluation function, and a dynamic annealing path module which can be directly applied to a PLC / DCS system is generated by using a clustering algorithm. According to the method, mathematical modeling and intelligent optimization are used for replacing test sampling, the surface quality can be remarkably improved, the energy consumption is reduced, the process adjusting efficiency is improved, and the method is suitable for the full-hydrogen cover annealing process with the high-precision and high-consistency requirements.

This invention belongs to the field of semiconductor optoelectronic device manufacturing technology and discloses a multi-stage annealing process for ITO thin films, including the following steps: Step 1: Under high vacuum protection, the furnace temperature is raised from room temperature to a first temperature T1 and held for a first time; Step 2: The furnace temperature is raised to a higher second temperature T2 and held for a second time, without the need for oxygen introduction during the second holding stage; Step 3: While maintaining the second temperature T2, a third holding stage is performed, and oxygen is introduced during the third holding stage; Step 4: A controllable cooling process is performed, which includes at least a slow cooling stage under the oxygen atmosphere and a rapid cooling stage under an inert gas or extremely low oxygen concentration atmosphere. This invention achieves precise staged control of the ITO thin film crystallization process, oxygen vacancy filling, and interfacial reactions by precisely controlling the oxygen partial pressure and cooling rate at different temperature stages.

The invention discloses a constant-temperature soldering furnace calibration device and method. The calibration device comprises a multi-channel temperature recorder and a plurality of temperature sensors arranged in a furnace groove. The cold end of each temperature sensor is connected with the multi-channel temperature recorder; the number and the distribution positions of the temperature sensors are determined by the shape, the size and the tin melting amount of the furnace groove. The multiple temperature sensors are arranged in the furnace groove at the same time, multi-point simultaneous measurement of the furnace temperature is achieved, and the temperature measurement efficiency is greatly improved; a multi-point simultaneous measurement mode is adopted, a temperature sensor does not need to be moved, and the problem that temperature uniformity of soldering tin is affected by movement of a temperature measurement probe during single-point temperature measurement is avoided; by means of the constant-temperature soldering furnace calibration device, periodical calibration can be conducted before the soldering furnace is used, synchronous monitoring can be conducted when the soldering furnace is used, the local temperature sudden change situation can be found in time, and welding quality reduction or device damage is avoided.

This invention relates to the field of industrial frequency furnace control technology, specifically to an industrial frequency furnace temperature control cabinet and a furnace temperature control method. A data acquisition module collects real-time data on the industrial frequency power supply input voltage and furnace load current. A disturbance prediction module predicts the trend of grid voltage fluctuations or load impedance changes based on a real-time data analysis model. A control unit communicates with the data acquisition module and the disturbance prediction module, generating a thyristor trigger signal based on the output of an adaptive dual-loop controller. Based on real-time data or predicted trends, the control unit identifies whether the current disturbance source is a grid-side disturbance or a load-side disturbance. When a grid-side disturbance is identified, the adaptive dual-loop controller is adjusted to increase the regulation weight of the voltage loop, allowing the voltage loop to dominate the generation of the thyristor trigger signal to compensate for voltage fluctuations. This invention achieves precise decoupling and rapid response to dual disturbances, while simultaneously improving the long-term reliability of the system.

The invention relates to a pilot-scale simulation coiling furnace. The pilot-scale simulation coiling furnace comprises a furnace body, a stirring fan system, an electric exhaust fan system, a water cooling system, an intelligent control unit and a detection unit, and the intelligent control unit takes an intelligent digital regulator as a core and adopts a PID (Proportion Integration Differentiation) self-tuning algorithm to realize accurate control of the furnace temperature, so that a rolled piece can be stably cooled at a settable average rate of 0.2-1.0 DEG C / min in a range of 100-900 DEG C. And the water cooling system cools a motor and a bearing of the stirring fan system through circulating cooling water, so that the service life of equipment is effectively prolonged. The industrial coiling cooling working condition can be accurately simulated, the reliability and reproducibility of experimental data are improved, the automation degree is high, operation is stable, and a powerful platform support is provided for optimization of a pilot plant test material cooling process.

This invention discloses a polycrystalline silicon reduction heat energy utilization system and method. The system includes a reduction furnace body, a base, a heat exchange jacket, an internal coil in the base, an external heat exchange jacket for the return water pipe, and a flash tank assembly. The internal coil in the base has a double-layer structure and is connected by a vertical pipe. The heat exchange jacket is divided into several arc-shaped jackets with parallel branch pipes equipped with solenoid valves. The jacket is equipped with vibrating plates and flow guides. The return water pipe is fitted with a heat exchange jacket with a flow guide plate. The drain pipe and return water pipe are respectively connected to different flash tanks. The method utilizes an infrared temperature sensor linked with a solenoid valve to achieve zoned temperature measurement and flow initiation. Through temperature-controlled vibration coordination, gradient heat exchange and water collection, and tiered flash evaporation for energy supply, heat energy from different parts is recovered and multi-level steam is generated according to the temperature gradient to meet diverse steam demand. This invention constructs a multi-dimensional heat energy recovery system, achieving efficient heat energy recovery and tiered adaptive energy supply, accurately controlling the furnace temperature, improving production continuity and stability, and has significant energy-saving and practical value.

The application provides a heat treatment method for reducing the hardness of GH4080A alloy, comprising the following steps: S1: selecting GH4080A alloy to be reduced in hardness, and sampling and testing the actual hardness thereof; S2: starting a continuous solid solution heat treatment furnace, setting the furnace temperature to 900-1000 DEG C, setting the holding time to 30-60 min, and adding the GH4080A alloy in step S1 into the continuous solid solution heat treatment furnace for treatment; S3: the GH4080A alloy in step S2 enters the furnace from the furnace head of the continuous solid solution heat treatment furnace, and after the holding time, the GH4080A alloy is discharged from the furnace tail through a cooling liquid, and the heat treatment is completed. Sampling is conducted on the cooled steel material for hardness testing. According to the application, the hardness of the GH4080A alloy is reduced without affecting the grain size of the GH4080A alloy, and the application has high commercial value and popularization value.

The application discloses a production method of ferrite stainless steel for mine equipment, which comprises the following steps: S1, feeding ferrite stainless steel slab after continuous casting into a holding pit for heat preservation treatment, and performing hot dressing when the surface temperature of the ferrite stainless steel slab in the holding pit is reduced to 400-450 DEG C; S2, feeding the ferrite stainless steel slab after the hot dressing into a hot rolling heating furnace for heating, controlling the furnace temperature of the hot rolling heating furnace at 1180-1210 DEG C, and controlling the furnace time at 180-220 min; S3, coarsely rolling the ferrite stainless steel slab discharged from the furnace to 28-35 mm by a furnace and roll mill, and then finely rolling to 3.0-6 mm; S4, coiling the rolled material by a coiling machine, and controlling the final coiling temperature at 650-700 DEG C; S5, performing full-hydrogen bell furnace annealing treatment on the hot-rolled black coil; S6, performing homogenizing heat treatment on the steel coil after the annealing treatment; and S7, shearing and packaging.

This invention provides a jacketed heat exchange device and a spheroidizing furnace for preparing silica powder. The jacketed heat exchange device includes a jacket body with a heat exchange medium inlet and a heat exchange medium outlet. The heat exchange medium outlet is located at the upper part of the jacket body. An exhaust device is also provided at the upper part of the jacket body. The exhaust device includes an exhaust bend, one end of which is inserted into the jacket body and extends upward to the top surface of the internal cavity of the jacket body. The exhaust bend can fully exhaust the gas between the heat exchange medium outlet and the top surface of the jacket body, thereby improving the overall heat exchange effect of the jacketed heat exchange device and reducing safety hazards. The spheroidizing furnace equipped with this jacketed heat exchange device can precisely control the furnace temperature during silica powder preparation, reducing the problem of uneven silica particle formation caused by temperature fluctuations, significantly improving product quality consistency and production efficiency, reducing the defect rate, and increasing economic benefits.

This utility model relates to the field of industrial boiler temperature measurement technology, specifically disclosing an infrared imaging furnace temperature detection device, including a thermometer body, a display panel, and a microphone array module. The display panel is rotatably mounted on the top of the thermometer body via a hinge, and the microphone array module is fixedly mounted on the front of the display panel. The upper half of the protective frame is closed to prevent impacts from above, while the lower half is open for easy disassembly and assembly of the lens module. The air vent, through an air curtain, reduces dust and smoke contamination of the lens at the source. The cleaning scraper, made of polytetrafluoroethylene, driven by a micro-drive motor and other components, can scrape away dust and impurities from the lens surface without scratching it, ensuring lens cleanliness and guaranteeing imaging and temperature measurement accuracy. The protective frame, cleaning scraper, and other structures also optimize and protect key components such as the lens with IP65 dustproof and waterproof design from different angles, further enhancing the overall reliability and durability of the device.

This invention provides a feedforward control system for improving the control accuracy of a heating furnace, comprising: a temperature sampling device that periodically collects the temperature of the heating furnace at preset time intervals; a feedforward temperature determination device for determining a feedforward temperature based on the temperature at the previous moment and the actual temperature; a furnace temperature control device for processing the feedforward temperature using a furnace temperature PID control method to obtain a furnace temperature control quantity; and a gas supply device for adjusting the gas supply to the heating furnace according to the furnace temperature control quantity, so as to adjust the temperature of the heating furnace towards a preset target temperature. This invention solves the problem of significantly reducing temperature overshoot without sacrificing the heating furnace temperature adjustment speed.

The application discloses a kind of AISI 410 stainless steel with good low-temperature toughness and manufacturing process, belong to martensitic stainless steel technical field, including the following steps: steel billet selection;Open billet;After the steel billet of open billet is placed in heating furnace and is heated in steps: furnace temperature is less than or equal to 280 DEG C, is heated to 603-608 DEG C when isothermal 2.5-3.2h, subsequent continues to heat to 1095-1100 DEG C, isothermal 2.5-3.2h;Finally heat to 1190-1210 DEG C and keep warm;Forging;Heat treatment quenching stage: heat to 1000-1015 DEG C, keep warm more than or equal to 5 h after, with furnace cooling to 963-970 DEG C, immerse in preheated 60-75 DEG C medium A and carry out quenching, when workpiece surface to 250-300 DEG C, transfer into mineral oil and cool to 45-55 DEG C.The application can significantly improve the low-temperature toughness of AISI 410 stainless steel, and ensure that material is high strength.

This invention relates to a forging method for improving the grain size of austenitic stainless steel pipes with nozzles. The method involves taking an electroslag ingot with a diameter of Φ1000–1200 mm, holding it at 1180±10℃ for 9–12 hours, and then drawing it to form a billet. After returning the billet to the furnace, the temperature is raised to 1200±10℃ and held for 7–8 hours. The billet is then upset with a flat upsetting cap, drawn into a flat square shape, and marked to form a flat square billet. This flat square billet is held at 1180±10℃ for 3–4 hours, drawn to lengthen both ends, and staggered to form a billet with a staggered nozzle. This staggered nozzle billet is held at 1150–1180±10℃ for 3–4 hours and then drawn, completing the forging process in one firing. This four-firing forging method for pipes with nozzles achieves a grain size ≥4 in the forging body, significantly improving the overall grain size of the austenitic stainless steel pipe with nozzle.

The invention relates to the technical field, in particular to a crystal transition and crucible transition coordinated regulation and control system based on oxygen and carbon content feedback, and belongs to the technical field of single crystal growth. Aiming at the defects of lack of multi-parameter linkage, regulation and control non-stage pertinence and no effect verification in the prior art, the system comprises five modules, namely an oxygen-carbon time sequence data acquisition module, an oxygen-carbon feature extraction module, a steering coordinated regulation and control module, a rotating speed parameter correction module and a regulation and control effect verification module. The system integrates oxygen and carbon content, growth stage identification and in-furnace temperature and pressure parameters, extracts oxygen and carbon dynamic characteristics in stages, cooperatively regulates and controls the rotation direction, time sequence and rotation speed difference of crystal rotation and crucible rotation, and verifies the regulation and control effect through uniformity comparison. According to the invention, deep synergy of oxygen-carbon feedback and mechanism regulation and control is realized, the regulation and control pertinence and accuracy are improved, the single crystal growth environment is stabilized, the cultivation of a single crystal material with high lattice regularity is assisted, and the requirements of the high-tech field on a core base material are met.

The invention relates to the technical field of metal product preparation, and discloses a manufacturing process of a high-strength wear-resistant alloy cast iron pan, which comprises the following steps: respectively carrying out magnetic separation impurity removal on a basic raw material and titanium powder, then carrying out vacuum roasting, cooling and discharging to respectively obtain pre-treated pig iron, pre-treated carbon steel and pre-treated titanium powder; preheating an induction furnace, adding the pretreated pig iron, and raising the furnace temperature until the pretreated pig iron is completely molten; then adding the pretreated carbon steel and the reinforced alloy, starting electromagnetic stirring, then adding the pretreated titanium powder, and continuously stirring after adding to obtain a melt; a composite inoculant is added into the melt and stirred, then molten iron is poured into a heat preservation launder for pouring, demolding is conducted after heat preservation, and a pot blank is obtained; the pot bottom and the pot body of the pot blank are subjected to partitioned cooling, then overall cooling and vibration aging treatment are conducted, and then natural cooling is conducted to the room temperature; and after the cooled pan blank is ground and polished, the pan blank is coated with a composite ceramic coating, and the high-strength wear-resistant alloy cast iron pan is obtained.

The application provides a tab for improving the furnace temperature passing rate of an electric core and a battery comprising the tab. The application utilizes the electric conduction and non-heat conduction phenomenon of a crystal material, fully utilizes the heat insulation property of the crystal material, can improve the electric conductivity of the tab, insulates the path of the external heat absorption and conduction of the tab to the inside of the electric core, insulates the heat conducted to the inside of the electric core by the tab at the edge of the heat insulation coating of the tab, protects the separator at the tab from being continuously baked by the external heat source to cause the thermal contraction of the separator and further cause the short circuit of the positive and negative tabs, reduces the internal thermal disorder failure caused by the thermal contraction of the separator, and improves the passing rate of the electric core in the furnace temperature test.

The utility model discloses a kind of smelting furnaces based on spectral analysis on-line detection molten steel temperature, it is related to smelting furnace temperature detection technical field, its technical key points include furnace body, optical fiber pedestal and focal length adjusting cylinder, the top of furnace body is fixedly installed with lengthening cylinder, the top of lengthening cylinder is provided with lens mounting port, the inside of lens mounting port is provided with lens, the focal length adjusting cylinder includes the outer tube fixedly installed in the top of lengthening cylinder and the inner tube slidingly installed in the upper end of outer tube, the optical fiber pedestal is fixedly installed in the upper end of inner tube, the both sides of inner tube are fixedly connected with first connecting block, the outside of outer tube is fixedly connected with second connecting block, and the bottom of one of first connecting block is rotatably connected with screw rod, and the lower end of screw rod is threadedly connected with one of second connecting block. Technical effect is by setting focal length adjusting cylinder, the quick adjustment of lens focal length can be realized, and adjustment is more flexible.

The invention discloses a method for eliminating internal stress of a large-scale polycrystalline diamond block material. The method comprises the following steps that the block material is placed in a vacuum heat treatment furnace; carrying out vacuumizing and gas washing operation on the furnace chamber so as to remove residual active gas; introducing high-purity protective gas into the furnace and maintaining positive pressure; executing a stepped heating and heat preservation process: firstly, heating to a first heat preservation temperature T1 at a first heating rate and preserving heat, and then heating to a higher second heat preservation temperature T2 at a second heating rate and preserving heat; and after heat preservation is completed, the controlled cooling process is executed till the furnace temperature is reduced to the room temperature. A strategy of'stepped heating + long-time heat preservation 'is adopted, firstly, the stress of a part of a high-energy area is preliminarily relaxed at a low temperature T1, and cracking caused by stress concentration due to rapid heating is avoided; then, at a higher temperature T2, sufficient energy is provided for atomic diffusion and grain boundary slippage, and deep and uniform release of the internal stress is achieved. And the method is particularly suitable for large-scale blocks.

The application relates to the technical field of impurity removal and purification, in particular to a high-temperature impurity removal and purification method for graphite materials, which comprises the following steps: when high-temperature purification is carried out on the graphite materials by using a high-temperature purification furnace, the furnace temperature, the output power and the temperature and voltage of each induction coil at each moment in each monitoring period in each high-temperature purification process are obtained; the first evaluation value, the power fluctuation degree, the second evaluation value and the evaluation coefficient of each monitoring period are calculated; the bridging confidence of each monitoring period in each high-temperature purification process is determined; the bridging phenomenon occurring in each monitoring period in the present high-temperature purification process is evaluated, and the bridging phenomenon existing in the high-temperature purification furnace is eliminated, so that the high-temperature purification is carried out on the graphite materials. The application can accurately evaluate the bridging phenomenon occurring in the high-temperature purification furnace, and ensure the stable operation of the high-temperature purification process and the high-quality purification of the graphite materials.

The invention belongs to the field of metal heat treatment intelligent manufacturing, and particularly relates to a large component hardening and tempering process closed-loop control method based on batch end quenching data correction, which comprises the following steps: carrying out a Jominy end quenching test on a batch of steel to be treated to obtain an end quenching hardness curve; the equivalent end quenching distance of the key position of the component is determined through an equivalent conversion model, and the actually measured initial hardness is read; constructing a tempering model containing an initial hardness genetic factor; correcting the sensitivity coefficient of the model by using single-point tempering test data of the end-quenched sample; reversely calculating a target tempering parameter according to the target hardness, calculating a tempering set temperature in combination with the production takt, and sending the tempering set temperature to the PLC temperature control system; and furnace temperature feedback is collected in real time during tempering, and the heat preservation time is dynamically adjusted to keep the target tempering parameter constant. Accurate control based on the real hardenability of the raw materials is achieved by introducing the actually measured initial hardness, and the consistency of the performance of the quenched and tempered large component is remarkably improved.

The application relates to the technical field of single-crystal silicon heat field material preparation, and discloses a processing and manufacturing process and system of single-crystal silicon growth heat field graphite products. The process comprises the following steps: S1, preparation of a preform, S2, baking treatment, S3, index detection grading, S4, furnace loading zoning, S5, graphitization treatment, and S6, machining forming steps. Through accurate control of the preparation parameters of the preform, establishment of a multi-dimensional index detection grading standard and matching of the furnace loading zoning strategy of the Acheson furnace temperature field, the problems of poor performance uniformity and high impurity content of the graphite products in the traditional process are solved, and the purity, density and size stability of the single-crystal silicon growth heat field graphite are significantly improved. The system comprises a preform preparation unit, a grading detection unit, an intelligent furnace loading unit and a graphitization furnace body, automatic control is introduced, and the strict requirements of large-scale production of single-crystal silicon on heat field materials are met.

The present application relates to the technical field of graphitization furnace temperature monitoring, and particularly relates to a graphitization furnace working temperature measuring device and a measuring method. The method comprises: obtaining furnace core thermocouple data, gas inlet pressure and gas mass flow rate of a protection tube during the working process of the graphitization furnace; obtaining viscosity correction flow resistance at each moment according to the thermocouple data, gas inlet pressure and gas mass flow rate at each moment; if the gas inlet pressure in a local period at a moment satisfies the pressure steady state condition and the thermocouple data satisfies the temperature reference interval, then obtaining flow resistance instantaneous fluctuation value according to the difference between the viscosity correction flow resistance at each moment in the period in which the corresponding moment is located and the overall distribution; obtaining a crack jet characteristic index by combining the flow resistance instantaneous fluctuation value and the gas inlet pressure, and then taking corresponding response actions. The present application provides reliable protection for the integrity of the thermocouple protection tube of the core temperature measuring element of the graphitization furnace, and improves the intelligent level and operation safety of the graphitization production process.