380results about "Checking devices" patented technology

The invention discloses a blast furnace working condition knowledge graph construction method and device, and belongs to the field of blast furnace ironmaking intelligent control. The method comprises the following steps: fusing multi-source data, integrating sensor real-time data, process parameters, operation logs and expert rules, and enhancing abnormal working condition data generation capability by using a time sequence generative adversarial network; a three-layer dynamic body structure with the core abnormal furnace condition as the center is constructed, and a dynamic edge weight updating mechanism is designed; extracting multi-region spatial-temporal characteristics of the blast furnace by adopting a spatial-temporal diagram convolutional network, and generating an interpretable knowledge triple in combination with a causal discovery algorithm FGES; and realizing real-time updating of the knowledge graph based on a streaming graph learning framework, generating a regulation and control instruction through multi-agent reinforcement learning, and issuing the regulation and control instruction to a blast furnace control system through a digital twin interface. The method can clearly represent the symptom incidence relation of the abnormal furnace condition of the blast furnace, rapidly position the abnormal source and generate the regulation and control strategy, and has important practical significance for improving the intelligent level of blast furnace ironmaking.

The invention relates to the technical field of blast furnace clay gun control, and discloses a blast furnace stokehole clay gun control system. The system comprises a data acquisition module, a state feature extraction module, a multi-dimensional difference analysis module, a risk area positioning module and a self-adaptive control strategy generation module. The data acquisition module acquires a clay gun pressure waveform, an iron notch temperature sequence and a stemming flow pulse in real time; the state feature extraction module extracts operation state features based on the operation data; the multi-dimensional difference analysis module performs multi-dimensional difference analysis on the state characteristics and a preset theoretical state to generate a state difference coefficient matrix; a risk area positioning module positions an operation risk area based on the matrix; and the adaptive control strategy generation module generates an adaptive control strategy according to the risk area. The system realizes comprehensive acquisition of multiple parameters of mud gun operation, accurate state analysis, accurate risk positioning and self-adaptive control, improves the mud gun operation stability, ensures continuous operation in front of a blast furnace, and adapts to modern blast furnace production requirements.

A production method of pig iron using a blast furnace with a tuyere includes: charging a first layer containing an iron ore material and a second layer containing coke alternately in the blast furnace; and reducing and melting the iron ore material in the charged first layer while injecting an auxiliary reductant into the blast furnace by hot air blown from the tuyere, in which: an aggregate for letting through the hot air to a central portion of the blast furnace is blended into the first layer; and the aggregate contains a reduced iron molded product obtained through compression molding of reduced iron.

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 discloses an intelligent blast furnace condition trend early warning system and method. The system comprises a data acquisition module, a dynamic detection module, a quality association module and a feedback control module. The data acquisition module generates original feature signals of time-space correlation; the preprocessing module receives the original characteristic signals and filters noise interference through a Gaussian process regression algorithm; the prediction module generates associated characteristics of gas flow distribution and charge level form, and then captures a long-period trend component in the standardized data flow through a time convolutional network; the feedback module receives the furnace condition evolution probability signal and generates virtual blast furnace state data based on a gas-solid two-phase flow and heat transfer coupled physical field simulation model; and the early warning module generates a grading early warning instruction according to the degree of the parameter calibration signal crossing the preset threshold. According to the intelligent blast furnace condition trend early warning system and method, the problem that early warning lags due to the fact that a traditional blast furnace condition early warning method depends on a single parameter, a static model and artificial experience can be solved.

The utility model discloses a blast furnace top coke charging smelting material layer thickness adjusting mechanism based on reduction of heat loss, and belongs to the field of blast furnace smelting equipment. The problems that a feeding port is prone to being blocked, and the smelting effect and the smelting efficiency are affected are solved. Materials are conveyed into the shell through the feeding pipe, at the moment, the rotating rod rotates to stir the materials in the shell, in the material stirring and mixing process, caked materials are dispersed through the cutting plate, the discharging efficiency is effectively improved, the materials are prevented from blocking the feeding port, the materials are preliminarily dispersed through the rotating rod and the cutting plate, and the material mixing efficiency is improved. And the dispersed materials fall into the base, the vibrating plate is driven to vibrate while the rotating rod rotates, the materials on the vibrating plate are evenly distributed through vibration, accumulation of the raw materials is further avoided, and the smelting efficiency and the smelting effect are effectively improved.

The invention belongs to the technical field of blast furnace gas treatment, and relates to a method for controlling zero emission of gas in a single blast furnace, which comprises the following steps: step 1, carrying out comprehensive adjustment according to original gas balance, and maintaining gas supply and demand balance; 2, by means of interval regulation and control of the gas holder, dynamic storage of the gas holder and pressure stabilization of a pipe network are achieved; step 3, effectively controlling a switch valve group of tail end diffusion to ensure that the tail end diffusion is safe and controllable; and 4, emergency treatment is conducted in the abnormal production state, special measures are made for blast furnace air reduction, gas flow abnormity and gas temperature abnormity, system safety is guaranteed preferentially, and the zero-emission target is dynamically maintained. According to the method, efficient utilization and zero emission of the blast furnace gas are achieved through multi-link cooperative regulation and control, environmental pollution is reduced, and production economy is improved.

This invention relates to a control system for preventing molten iron overflow during ladle discharge. The system includes a furnace platform with a molten iron trough and two sets of rails passing beneath the furnace platform. A swing chute is located below the outlet of the molten iron trough. Ladle cars are mounted on the two sets of rails, each carrying a molten iron ladle. Each set of rails has a molten iron discharge station located below the swing chute. A ladle car position sensor is installed beside each discharge station on the rails to detect whether the ladle car is in position. A rail weighing scale is installed at each discharge station, and a radar level gauge is installed above the discharge station to detect the liquid level in the molten iron ladle. This invention provides a control system for preventing molten iron overflow during ladle discharge, achieving accurate control of the discharge amount. It can remind workers to switch discharge lines in a timely manner and can automatically switch lines if workers do not make adjustments, reducing the risk of excessive molten iron overflow damaging the ladle and ladle car, and ensuring safe production.

The utility model discloses a blast furnace gas pipeline with a U-shaped water seal accumulated water detection device, and relates to the technical field of metallurgical equipment safety monitoring. The device comprises a U-shaped water seal provided with a gas inlet and a gas outlet, the gas inlet is connected with a gas inlet pipeline, the gas outlet is connected with a gas outlet pipeline, a water outlet is formed in the bottom of the U-shaped water seal, and the water outlet is connected with a water outlet pipeline; a gas pressure detector is arranged on the gas inlet pipeline, and a water level detector is arranged on the water outlet pipeline; the signal output end of the gas pressure detector and the signal output end of the water level detector are connected with the input port of a PLC, and the output port of the PLC is connected with an audible and visual alarm and a computer. According to the utility model, on-line real-time monitoring of the accumulated water condition of the U-shaped water seal of the blast furnace gas can be realized, the excessive accumulated water condition of the U-shaped water seal can be found in time, drainage operation is arranged, the problem of unsmooth circulation of the blast furnace gas is effectively prevented, and potential safety hazards are reduced.

The utility model relates to the technical field of water temperature monitoring, in particular to a blast furnace cooling wall water temperature monitoring device. According to the technical scheme, the temperature probe comprises a pipe ring, a temperature probe and a ball body, the pipe ring is provided with a positioning seat and a base, the base is provided with a sleeve, the bottom end of the sleeve is provided with a ball sleeve, the ball body is rotatably arranged in the ball sleeve, the ball body is provided with a shaft rod, the shaft rod penetrates through the ball sleeve and is rotatably arranged on the positioning seat, and the shaft rod is provided with a rotating shaft. A positioning assembly is arranged at the end of the shaft rod, the temperature probe is inserted and positioned on the sleeve through a base, and the bottom end of the temperature probe penetrates through the ball body. According to the utility model, through cooperation of the structures, the temperature probe can be dismounted without cutting off all pipelines, and the maintenance convenience of the temperature measurement monitoring device is improved.

The utility model discloses a blast furnace top coal gas sampling and intelligent temperature control device, characterized by cross temperature measuring device cantilever insertion type detector as the basis, through the addition of coal gas sampling channel, the addition of blast furnace top water spraying supply channel, the addition of multi-point blast furnace top water spraying (spraying) nozzle and coal gas sampling port, the cross temperature measuring, blast furnace top water spraying, coal gas sampling and other multiple devices with different functions on the blast furnace top coal gas sealing cover are integrated into a set of device, and intelligent temperature control system and blast furnace condition intelligent auxiliary analysis system realize intelligent and automatic operation. Its advantages are that it can reduce equipment investment and later operation and maintenance cost, reduce too many equipment openings on the coal gas sealing cover, reduce construction engineering quantity, obtain blast furnace internal coal gas distribution curve and improve blast furnace operation. It is suitable for popularization in new construction and transformation projects of various steel enterprises.

The invention discloses a slag crust supplementing method and device, electronic equipment, a medium and a program product, the slag crust supplementing method is applied to a blast furnace, and the blast furnace comprises a furnace body, a cooling layer and a slag crust layer; the slag crust supplementing method comprises the following steps: acquiring temperature data in a blast furnace; determining a slag crust missing area of the cooling layer based on the temperature data; and the slag crust raw materials are supplemented to the slag crust missing area, so that a slag crust layer is formed in the slag crust missing area. According to the slag crust supplementing method, the temperature data in the blast furnace are obtained, the slag crust missing area of the cooling layer is determined based on the temperature data, the slag crust raw materials are actively supplemented to the slag crust missing area, the slag crust layer is formed in the slag crust missing area, and the mode that in the prior art, the slag crust layer is naturally formed passively depending on molten slag in the furnace is replaced; the protection layer can be rebuilt actively and quickly, so that the dry burning time of the cooling layer in an unprotected state is remarkably shortened, and the cooling layer is effectively prevented from being damaged due to overheating.

The invention relates to a blast furnace bottom flat steel rapid leveling construction method, which comprises the following steps that a plurality of support units are welded on a furnace bottom plate, each support unit comprises a plurality of support angle steels, and the plurality of support angle steels are arranged in a positive and negative staggered manner; the multiple flat steel meshes are installed on the multiple supporting units respectively, each flat steel mesh comprises multiple pieces of flat steel, the multiple pieces of flat steel are sequentially installed on the supporting units, and the length of each piece of flat steel and the distance between every two adjacent supporting angle steel in each supporting unit keep the corresponding modulus; the length of the flat steel and the distance between every two adjacent pieces of supporting angle steel in each supporting unit are set to keep the corresponding modulus, it is ensured that the flat steel connector always falls in the center line area of the supporting angle steel, the area is high in supporting rigidity and uniform in stress, welding misalignment is avoided from the structure root, meanwhile, the vibration resistance of the connector after welding is greatly improved, and the product quality is improved. And the ramming desoldering problem is thoroughly solved.

The present application relates to a kind of blast furnace residual iron furnace residual iron mouth position determination method, comprising: the determination of furnace residual iron mouth elevation position and the determination of furnace residual iron mouth circumferential position and the like steps.The blast furnace residual iron furnace residual iron mouth position determination method provided by the present application, by the erosion rate of furnace refractory, blast furnace refractory thermal conductivity coefficient and blast furnace running time model, determine the thinnest part of refractory, i.e.elevation (i.e.latitude), by circumferential position model, again in combination with the convenience of residual iron and furnace cooling wall temperature detection, determine specific cooling wall (i.e.latitude), compared with prior art, it is a more scientific method.

A computer system (100), a computer-implemented method and a computer program product for training a reinforcement learning model (130) to provide operational instructions for blast furnace thermal control are provided. A domain-adaptive machine learning model (110) generates a first domain-invariant dataset (22) from historical operational data (21) obtained as multivariate time series and reflecting thermal states of respective blast furnaces (BF1 to BFn) of a plurality of domains. A transient model (121) of a generic blast furnace process is used to generate artificial operational data (24a) as multivariate time series reflecting thermal states of a generic blast furnace (BFg) for specific thermal control actions (26a). A generative deep learning network (122) generates a second domain-invariant dataset (23a) by transferring features learned from the historical operational data 21 to the artificial operational data (24a). A reinforcement learning model (130) determines (1400) a reward (131) for specific thermal control actions (26a) by processing the combined first and second domain-invariant datasets (22, 23a) in view of a given objective function. In accordance with the reward (131), the second domain-invariant dataset is regenerated based on modified parameters (123-2) and the determination of the reward is repeated to learn optimized operational instructions for optimized thermal control actions to be applied to respective operational states of one or more blast furnaces.

The invention relates to the technical field of blast furnace ironmaking, and particularly discloses an energy efficiency improvement and cost control method for a hydrogen-rich carbon circulating oxygen blast furnace system. Aiming at the problems of high decarburization energy consumption, insufficient equipment operation efficiency and high maintenance cost of the existing HyCROF system, five core measures of low-grade waste heat gradient utilization, regeneration gas cooling system transformation, decarburization compressor efficiency optimization, amine liquid system intelligent management and control and cost closed-loop early warning are cooperatively implemented; the system energy consumption is obviously reduced, and the operation cost is accurately controlled. According to the method, the cost of molten iron can be reduced by 40-50 yuan / ton, the cost difference between the method and a traditional blast furnace is greatly reduced, meanwhile, the system operation stability and the resource recycling rate are improved, key support is provided for commercialized popularization of the HyCROF technology, and the method is suitable for hydrogen-rich carbon circulating oxygen blast furnace systems of various scales.

The invention relates to the technical field of airflow regulation and control, and discloses a blast furnace pipeline airflow regulation and control device and a blast furnace pipeline airflow regulation and control method. When the average pressure of the furnace top exceeds the limit, the system recognizes the airflow form according to the spatial dispersion: if the spatial dispersion is smaller than a threshold value, it is judged that the blast furnace is in a normal state, and equipment does not need to act, so that material setting impact caused by mistaken pressure relief is avoided; if the spatial dispersion is larger than or equal to the threshold value, it is judged that the working condition is the real pipeline airflow working condition, and the anti-surge valve is driven to be opened to the target opening degree for pressure relief. And after fault processing is finished, the system calculates heat loss according to the energy conservation principle and executes fuel compensation. The method solves the problem that whether the airflow is real pipeline airflow or not cannot be judged in the prior art, and the safety and thermal system stability of blast furnace control are improved.

The application provides a blast furnace hearth bottom erosion discrimination method based on new installation and old thermocouple combination, which comprises the following steps: (1) constructing a grid node according to a blast furnace structure parameter; (2) discriminating a damaged thermocouple on the grid node, and arranging a new thermocouple in a corresponding area; (3) measuring temperature data of each temperature monitoring node of the new thermocouple and the old thermocouple, and calculating temperature data of the temperature monitoring node at the corresponding damaged thermocouple by using the temperature data of the new thermocouple; and (4) establishing an area grid according to the temperature data of the temperature monitoring node in step (3), so that a hearth bottom erosion condition model is obtained. The application comprehensively considers the existing thermocouple distribution and damage condition of the hearth, reasonably arranges the arrangement points of the new thermocouple, and provides an effective shortcut for improving the long service life level of the blast furnace and guiding the safety production.

The application discloses a judgment method of the tapping state of a blast furnace ladle, and belongs to the technical field of steel production. The method comprises the following steps: step one, building a liquid level automatic monitoring and early warning system; step two, performing Kalman filtering processing on the obtained liquid level data, performing real-time denoising and prediction, and judging the tapping state according to the processed liquid level data; and step three, performing early warning when the liquid level of the molten iron is too high and reaches the set filling amount warning point, and recording the alarm time under the conditions of the tapping start, the tapping end and the high liquid level at the same time of monitoring the tapping state. The application realizes automatic monitoring and automatic judgment of the tapping state, can monitor the liquid level in the ladle in real time and accurately, effectively solves the problems of time waste and low production efficiency caused by judgment errors and interference compared with the traditional manual judgment method, and improves the full ladle rate and use efficiency of the ladle.

This invention provides an energy-saving blast furnace gas temperature regulation device, applied at the blast furnace gas outlet. It includes a gravity dust collector, a radiator, a dust collection bag, and a turbine. The gravity dust collector is connected at one end to the blast furnace gas outlet and at the other end to the radiator, used for preliminary removal of large particulate impurities from the blast furnace gas. The radiator is connected at one end to the gravity dust collector and at the other end to the dust collection bag, used to control the temperature of the blast furnace gas and prevent damage to the dust collection bag. The dust collection bag is connected at one end to the radiator and at the other end to the turbine, used to remove impurities from the blast furnace gas, completing the purification process. The turbine, connected to the dust collection bag, converts the pressure and thermal energy of the blast furnace gas into rotational mechanical energy to drive a generator. This invention effectively regulates the temperature of the blast furnace gas, simultaneously treating the gas and enabling its recycling.

This invention discloses a monitoring system and method for blast furnace hearth slag and iron storage. The system includes a raw material system, a slag and iron system, a processing system, and an early warning system. The method includes determining the chemical composition of the raw materials; establishing a charging procedure during the blast furnace charging process, recording the probe's action time and batch weight; determining the tapping speed and weight; determining the slag tapping speed and weight; performing chemical testing on the molten iron and slag; filtering and processing the data fed back from the raw material and slag and iron systems; and providing graded early warnings for the data in the processing system, issuing warnings to front-line operators, and providing furnace operation signals and raw material warning signals. This invention calculates the theoretical pig iron and theoretical pig slag production of the blast furnace and provides early warnings for the blast furnace raw material and slag and iron systems. This invention can effectively reflect the slag and iron storage in the hearth and is of great significance for guiding furnace operations.

This process control method includes: a response prediction step of finding a predicted value for a prospective molten-iron temperature by utilizing a physical model with which the state of the interior of a blast furnace can be calculated; and an operational-control-level determination step of, if the absolute value of the difference between the predicted value for the molten-iron temperature found in the response prediction step and a target value is greater than or equal to a prescribed threshold value, finding a deviation between the predicted value for the molten-iron temperature and the target value, to find a pulverized coal ratio and an operational-control level for blown-air moisture content such that an evaluation function having a term corresponding to the deviation and a term for decreasing a reducing-material ratio or the blown-air moisture content is minimized or maximized, and if the absolute value is less than the prescribed threshold value, combining, in accordance with intention, two among pulverized coal ratio, blown-air moisture content, and blown-air temperature, to find an operational-control level such that the predicted value is maintained.

Provided is a molten material height detection method that can easily identify a frequency at which a molten material height in a smelting furnace can be detected and can detect a molten material height by using a vibration intensity at the frequency. The molten material height detection method for detecting a molten material height in a smelting furnace includes measuring vibration at one or more positions of a furnace wall of a lower portion of the smelting furnace, calculating a vibration intensity at a frequency that is correlated with vibration generated by introduction of a gas into an inflow hole of the lower portion by analyzing a frequency of the vibration, and detecting the molten material height by using a corrected vibration intensity obtained by removing influence of blast volume of a gas introduced through the inflow hole from the vibration intensity at the frequency.

To reduce the measurement error of the thickness of a refractory material.SOLUTION: A thickness measurement method includes: an elastic wave output step of outputting elastic waves to a furnace wall; a reflection wave detection step of detecting reflection waves of the elastic waves reflected by the furnace wall; a frequency characteristic calculation step of executing frequency analysis on a signal based on the reflection waves and calculating frequency characteristics; and a thickness calculation step of, based on the calculated frequency characteristics and a correspondence between frequency characteristics and the thickness of a refractory material which have been previously associated, calculating the thickness of the refractory material. The correspondence between the frequency characteristics and the thickness of the refractory material is previously made by a correspondence step of associating the frequency characteristics with the thickness of the refractory material on the basis of the detected reflection waves detected upon forming the furnace wall.SELECTED DRAWING: Figure 1

The utility model discloses a main iron runner safety early warning device which comprises a working layer refractory material, a permanent layer refractory material and a ventilation prefabricated part, the working layer refractory material is formed on the inner side wall face of the permanent layer refractory material, a molten iron runner is arranged in the working layer refractory material, the first end of the ventilation prefabricated part is inserted into the working layer refractory material and extends towards the direction of the molten iron runner, and the second end of the ventilation prefabricated part is inserted into the permanent layer refractory material. The first end of the breathable prefabricated part is located at the lowest residual thickness position of the working layer refractory; a gas transmission channel is arranged in the breathable prefabricated part, one end of the gas transmission channel penetrates through the first end of the breathable prefabricated part, and the other end of the gas transmission channel penetrates through the second end of the breathable prefabricated part and is communicated with gas source fluid. By arranging the breathable prefabricated part, when the working layer refractory material is eroded to the minimum residual thickness, compressed air is continuously discharged, bubbles are generated in molten iron, the pressure monitoring meter is matched, the safety early warning effect can be rapidly achieved, and the utilization rate of the working layer refractory material is increased.

This invention belongs to the field of blast furnace operation and longevity technology, and relates to a combined cooling structure and cooling process for stabilizing the internal shape of a blast furnace belly. The combined cooling structure includes: a belly cooling wall, continuously arranged circumferentially along the inner side of the furnace shell, with its hot surface protruding inwards, such that the hot surfaces of multiple belly cooling walls together form a continuous inclined plane consistent with the designed belly angle α; a first cooling plate layer, continuously arranged circumferentially along the lower part of the belly cooling wall, and extending radially in the blast furnace to cover the lower end of the belly cooling wall; and a second cooling plate layer, composed of multiple second cooling plates arranged below the first cooling plate layer. This invention, through its innovative structural design of the hot surface of the belly cooling wall protruding inwards and the continuous arrangement of the first cooling plate layer forming a protective eave, solves the problem of internal shape instability caused by changes in refractory or slag thickness.

The invention belongs to the technical field of blast furnace ironmaking, and discloses a hierarchical control method for blast furnace top water fetching and cooling. According to the method, in order to solve the problems that when the furnace top temperature abnormally rises, control is not stable, and the water amount is not easy to control, hierarchical control is achieved by dividing an operation scheme into three modes including an automatic mode, a self-selection mode and a self-definition mode. Wherein the automatic mode is used for daily furnace condition temperature abnormal rising, and water spraying guns are symmetrically opened in four stages according to the temperature rising speed; the self-selection mode is used for starting and supplementing a water gun according to a top temperature measurement point division mode for high-frequency temperature point abnormity; the user-defined mode allows an operator to freely select the water gun. According to the method, the furnace top temperature can be effectively controlled within a reasonable range, the timeliness and effectiveness of water fetching and cooling are enhanced, the lag problem caused by mistaken water fetching and local airflow is avoided, the influence on production in the furnace is reduced, and stable operation of a gas dust removal system is facilitated.

The invention discloses a blast furnace gas dry method bag type dust collector front temperature adjusting system and method, and the system comprises a gravity dust collector which is connected with a blast furnace through a blast furnace raw gas pipeline, and a gas outlet pipeline of the gravity dust collector is provided with a first four-way assembly and a second four-way assembly; a first air outlet of the first four-way assembly is connected with the cooling heat exchanger through a cooling heat exchanger air inlet pipeline, a second air outlet of the first four-way assembly is connected with the heating heat exchanger through a heating heat exchanger air inlet pipeline, and a third air outlet of the first four-way assembly is connected with a first air inlet of the second four-way assembly through a medium-temperature pipeline. A second air inlet of the second four-way assembly is connected with a cooling heat exchanger air outlet pipeline, a third air inlet of the second four-way assembly is connected with a heating heat exchanger air outlet pipeline, and an air outlet of the second four-way assembly is connected with a dry bag type dust collector air inlet pipeline; a first thermodetector is arranged on the blast furnace raw gas pipeline, and a second thermodetector is arranged on a gas outlet pipeline of the gravity dust collector; and a first regulating valve, a second regulating valve and a third regulating valve are respectively arranged on the cooling heat exchanger air inlet pipeline, the medium-temperature pipeline and the heating heat exchanger air inlet pipeline.

A method for detecting the height of a molten material with higher detection accuracy than conventional methods is provided. A molten material height detection method for detecting the molten material height in a blast furnace, which measures vibrations at one or more positions on the furnace wall in the lower part of the blast furnace, analyzes the vibration frequency to identify the vibration intensity of a frequency that is correlated with the vibration generated by introducing gas into an inlet in the lower part of the furnace, and detects the molten material height using a corrected vibration intensity that removes the influence of the amount of bosh gas generated by the introduction of gas from the vibration intensity of the identified frequency.

The invention relates to a water seal device for blast furnace gas diffusion, which belongs to the technical field of blast furnace gas diffusion protection and comprises a water seal tank, a gas inlet pipe, a gas outlet pipe, a rupture disk, a pressure detection component, an overflow component, a water replenishing component, a drainage component, a water level height detection component and a nitrogen purging component. The gas inlet pipe and the gas outlet pipe are communicated with the interior of the water-sealed tank, the rupture disk is arranged on the side of the water-sealed tank and used for relieving pressure, the overflow assembly is used for discharging redundant water in the water-sealed tank, the water supplementing assembly is used for adding water into the water-sealed tank, the pressure detection assembly is used for monitoring the pressure value in the water-sealed tank, and the drainage assembly is used for draining the water in the water-sealed tank. The water level height detection assembly is used for monitoring the height of the water level, and the nitrogen purging assembly is used for discharging blast furnace gas in the water-sealed tank. The water seal device provided by the invention not only can be used as a standby diffusing means to effectively prevent the pipe network from being damaged by overpressure, but also can be synchronously adjusted according to the pressure setting change of the electric diffusing device.