768results about "Checking devices" patented technology

The invention discloses a method for predicting blast furnace TRT equipment maintenance time based on an LSTM model, and the method comprises the steps: constructing a sliding window adaptive algorithm based on vibration signal change characteristics, and dynamically adjusting the size of an input data sliding window of the LSTM model according to the fluctuation amplitude and change rate of a vibration signal; adopting an adaptive sliding window to obtain TRT equipment training data, and training the LSTM model; applying the trained LSTM model to the vibration signals acquired in real time, predicting the vibration trend of the TRT equipment in the future n days at the current point, and outputting a predicted value of the vibration signals in a future period of time; and according to the prediction result of the vibration signal, in combination with a preset threshold value of shutdown maintenance, judging the time when the TRT equipment reaches the threshold value, and further obtaining the remaining days of the TRT equipment away from the maintenance. According to the method, the future development trend of the TRT equipment vibration signal is accurately predicted, the maintenance plan is reasonably arranged, and the TRT equipment operation reliability and production efficiency are improved.

The present invention provides a method and apparatus for predicting the temperature of molten iron in blast furnace smelting, an electronic device, and a storage medium. The method comprises: acquiring original fuel parameters, blast parameters, coal gas blowing parameters, furnace top coal gas parameters, and slag iron parameters in a blast furnace smelting process; on the basis of the original fuel parameters, the blast parameters, and the coal gas blowing parameters, determining the furnace bosh coal gas amount, the furnace bosh coal gas component, and the theoretical coal gas combustion temperature at a tuyere rotation area; determining the direct reduction degree of iron ore on the basis of the furnace top coal gas parameters, the slag iron parameters, the furnace bosh coal gas amount, and the furnace bosh coal gas component; determining a gas-liquid heat exchange coefficient on the basis of the theoretical coal gas combustion temperature, the furnace bosh coal gas component, the slag iron parameters, and the coal gas component after direct direction; and on the basis of the gas-liquid heat exchange coefficient, the direct reduction degree of iron ore, the theoretical coal gas combustion temperature, and the slag iron parameters, performing iterative solution of the molten iron temperature and the coal gas temperature, so as to complete prediction of the temperature of molten iron in the blast furnace smelting. The accuracy of molten iron temperature prediction can be improved, and a good basis is provided for blast furnace smelting control, ensuring stable and smooth operation of a blast furnace.

The invention discloses an online monitoring management method and system for the complete cycle of carbon, iron and zinc separation of blast furnace bag-type dedusting ash, and relates to the technical field of dedusting control, the method comprises the following steps: dividing the complete cycle of the carbon, iron and zinc separation process of the blast furnace bag-type dedusting ash into a plurality of separation stages, and sequentially executing automatic monitoring of each separation stage, and according to the stage monitoring index set, carrying out separation state evaluation of the current stage, if a stage separation evaluation result is qualified, entering the next separation stage, and if the stage separation evaluation result is unqualified, carrying out separation compensation calculation, and carrying out carbon-iron-zinc separation regulation and control according to a separation compensation strategy. The technical problems that in the prior art, real-time regulation and control means are lacked, separation deviation is difficult to correct rapidly, and the blast furnace cloth bag dedusting ash carbon-iron-zinc separation efficiency and the resource recovery rate are affected are solved, and the technical effect that the blast furnace cloth bag dedusting ash carbon-iron-zinc separation efficiency and the resource recovery rate are improved through staged real-time monitoring and dynamic regulation and control is achieved.

A system for measuring a thickness of a cooling plate, said system comprises: a probe holder unit (10) designed to fit inside a coolant channel (18) of the cooling plate (12), the probe holder unit comprising a housing (30) extending along a length axis (L), an ultrasonic probe (32) being arranged in said housing to be able to transmit and receive ultrasonic waves from a sensor side; a rear housing part (36) being moveably arranged at the rear side, transversally to the length axis, and elastically biased away from the sensor side, thereby permitting the probe holder unit to adapt to the cooling channel size; a drive chain (14) to assist the progression of said probe holder unit (10) through the length of the coolant channel, said drive chain linked to first connecting means (48) at said first end of said housing. A cable assembly (60) comprising electric wires connects the ultrasound probe. An encoder arrangement (15) is configured to cooperate with the drive chain such as to measure a length of drive chain passing along it, the encoder arrangement comprising a first gear (76) meshing with said drive chain and coupled to an encoder.

The embodiment of the invention provides a molten iron blending control system and method after blast furnace reblowing. The system comprises a molten iron monitoring subsystem, an iron blending control subsystem, an intelligent scheduling subsystem and a central processing unit. The central processing unit receives slag content associated data detected by the molten iron monitoring subsystem, monitoring parameters collected by the iron blending control subsystem and production associated information collected by the intelligent scheduling subsystem and inputs the slag content associated data into a slag content monitoring model so as to obtain slag content information through a machine learning algorithm. And first early warning information is generated according to the slag content information and the control reference data. And the iron blending speed and the iron blending angle in the iron blending process parameters can be calculated according to the monitoring parameters, the slag content information and the control reference data. And according to the production associated information and the iron exchange process parameters, an optimal iron exchange plan is generated by using an operational research algorithm. According to the system, the operation safety and the production efficiency can be improved through cooperation of a plurality of subsystems.

A blast furnace operation method according to one aspect of the present disclosure comprises: a parameter estimation step for estimating blast parameters and a pulverized coal ratio in a second operation, such that the amount molten iron produced, the molten iron temperature, and the furnace top gas temperature in the second operation match those in a reference operation; a change information acquisition step for acquiring information on a temporal change in one or both of the molten iron temperature and the amount of molten iron produced when performing the second operation based on the blast parameters and the pulverized coal ratio estimated in the parameter estimation step with a delay of a predetermined time after switching from the reference operation to the first operation; a repeating step for performing the change information acquisition step a plurality of times while changing the predetermined time; and an optimum delay time acquisition step for determining, as an optimum delay time, a predetermined time such that the temporal change in the molten iron temperature or the amount of molten iron produced is the smallest, on the basis of the information acquired in the repeating step. After switching from the reference operation to the first operation, the second operation based on the blast parameters and the pulverized coal ratio estimated in the parameter estimation step is started with a delay of the optimum delay time.

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 discloses a method for increasing the gas temperature at the top of a hydrogen-rich carbon circulating oxygen blast furnace. A combustion heat storage device for burning decarbonized coal gas is installed at the throat steel brick of the hydrogen-rich carbon circulating oxygen blast furnace. The combustion tube of the combustion heat storage device adopts high-speed airflow jet heating technology. The decarbonized coal gas and compressed air flow and mix in a certain proportion in the combustion tube, and are ignited and burned by an electronic spark device on the inner tube wall to form a stable heat source. 85-94% of the mixed gas is burned in the tube, and the rest is completely burned in the heat storage tube. A large amount of excess coal gas, flue gas and hot gas are ejected at a high speed of 110-250m / s, so that strong convection heat transfer is generated in the hydrogen-rich carbon circulating oxygen blast furnace, and due to the strong stirring of a large amount of gas, the mixing temperature of the low-temperature coal gas at the top of the hydrogen-rich carbon circulating oxygen blast furnace is uniform.

An information processing device (20) is provided with a control unit that: acquires observation data obtained for each observation time by observing, through use of a sensor (30), the surface layer of a deposited raw material (12) that is sequentially conveyed; uses the acquired observation data to calculate an index related to the particle diameter of each particle included in the deposited raw material (12) for each observation time; acquires measurement data obtained for each measurement time corresponding to each observation time by measuring the state of the deposited raw material (12); corrects the calculated index of the observation time corresponding to each measurement time by using the acquired measurement data; and outputs an index for each corrected observation time.

To determine whether a furnace condition is unstable or not.SOLUTION: In a method for determining a furnace condition of a blast furnace, a calculated tapping amount of a blast furnace is calculated in a predetermined cycle, and each time the calculated tapping amount is calculated, a coefficient of variation of the calculated tapping amount is calculated based on a plurality of calculated tapping amounts calculated in a predetermined period up to the present. When the increase in the coefficient of variation per unit time is equal to or greater than a predetermined threshold value, it is determined that the furnace condition is unstable. The threshold value may be N times (N is a positive integer) the standard deviation of the increase amount within the predetermined period, where the integer N may be 2.SELECTED DRAWING: Figure 2

The invention belongs to the technical field of blast furnace ironmaking, and particularly discloses a low-emission device for sulfur dioxide in flue gas of a gas heating furnace and a control method, the control method comprises the steps of controlling a blast furnace batching system and optimizing furnace burning parameters of the heating furnace, and the control of the blast furnace batching system comprises the steps of proportion of ore entering the furnace, optimization of blast parameters and control of tuyere return batching amount. Optimization of furnace burning parameters of the heating furnace comprises heat value reduction and control of furnace top gas. The problems that a special desulfurization device needs to be built in a matched mode in the existing tail-end flue gas desulfurization technology, the capital investment of enterprises is increased, and then the production cost is increased are solved. Through source control strategies in two aspects, the proportion of sintered ore to pellet ore is reasonably adjusted, the ore batch weight is dynamically adjusted according to the furnace condition, the blast parameters and the fuel ratio are optimized, meanwhile, the heat value of furnace burning gas is effectively controlled in a nitrogen mixing or flue gas blending mode, the ultra-low emission standard that sulfur dioxide at a gas heating furnace exhaust port is stably lower than 50 mg / Nm < 3 > is achieved, and the method is suitable for industrial production. And the pollution to the environment is greatly reduced.

The invention relates to the technical field of blast furnace tiled material layers, and particularly discloses a material distribution method for a blast furnace tiled material layer, which comprises the following steps: dividing furnace charge into large, medium and small particles according to particle diameters, filtering through different pore sieves, then distributing to a blast furnace through a material distribution chute according to a particle size sequence, and dividing a blast furnace material distribution layer into a plurality of areas, a laser radar is used for scanning to obtain sub-region height and wrinkle area information, a height difference value ratio mean value and a cloth wrinkle area ratio are calculated to obtain a cloth flatness coefficient, the cloth flatness coefficient is compared with a threshold value to generate a flatness analysis signal, the cloth flatness coefficient is monitored accordingly, a time-cloth flatness coefficient change curve is drawn, and a material layer fluctuation ratio is calculated. And if the fluctuation ratio of the material layer exceeds a threshold value, generating a tiling analysis signal, and finally, calculating the adjustment value of the rotation angle of the material distribution chute based on the signal and related parameters, so as to monitor and adjust the material distribution condition of the blast furnace, effectively improve the material distribution uniformity and stability of the blast furnace and guarantee stable production of the blast furnace.

The invention belongs to the technical field of metallurgy, and discloses a method for quickly reproducing after long-term damping-down reproducing of a blast furnace, which comprises the following reproducing steps: step 1, a hearth core active preheating step: before blast reproducing of a main tuyere of the blast furnace or at the initial stage of reproducing, introducing oxygen-containing gas into a hearth central area through at least one iron notch, the central area of the hearth is actively heated; and 2, a drainage channel pre-construction step: opening the other iron notch after the blast of the main tuyere of the blast furnace is recovered and before a large amount of liquid iron slag is formed, and enabling high-temperature coal gas to be sprayed outwards from the iron notch by utilizing the pressure of gas formed in the furnace so as to dredge the hearth, heat the iron notch area and pre-construct the iron slag drainage channel. The cold state problem of the center of the hearth is solved through active preheating, a smooth drainage channel is constructed in advance through high-pressure coal gas flow, an iron notch area is heated, and the fatal risk that a high-temperature liquid phase newly produced in the initial stage of re-production gathers in the front edge area of the tuyere is fundamentally avoided.

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.

The invention discloses a method for measuring and adjusting heat flow intensity of a blast furnace. The method comprises the following steps: (1) monitoring to obtain inlet temperature Tin of a blast furnace cooling wall, outlet temperature Tout of the blast furnace cooling wall and flow velocity V of cooling water in a water outlet pipe of the blast furnace cooling wall; (2) utilizing the inlet temperature T < inlet >, the outlet temperature T < outlet > and the cooling water flow velocity V, and calculating through a formula to obtain the actual measurement of the heat flow intensity J of the blast furnace cooling wall; (3) comparing the calculated heat flow intensity J actual measurement of the blast furnace cooling wall with a heat flow intensity control standard J standard, and if the heat flow intensity J actual measurement of the blast furnace cooling wall is in a normal value range, continuing to keep; and if the blast furnace cooling wall heat flow intensity J actually exceeds the normal value range, adjusting the blast furnace cooling wall heat flow intensity J and returning the blast furnace cooling wall heat flow intensity J to the normal value range. The method can accurately judge the heat flow distribution condition in the blast furnace and the change of the cooling intensity of each part, provides effective operation guidance for blast furnace operators, and prolongs the service life of the blast furnace.

The invention relates to the technical field of blast furnace pulverized coal distribution devices, and discloses a uniform distributor for blast furnace pulverized coal injection, which comprises a shell, a feeding pipe is communicated with the lower end of the shell, a plurality of groups of distribution pipes are communicated with the upper part of the shell, and a guide mechanism for guiding and redistributing pulverized coal is arranged in the shell. A feeding amount sensing mechanism for sensing the feeding amount of pulverized coal is arranged in the shell, a feeding amount adjusting mechanism for adjusting the opening size of the feeding pipe in real time according to the feeding amount of the pulverized coal sensed by the feeding amount sensing mechanism is arranged on the inner side of the feeding pipe, and a vibration cleaning mechanism for cleaning the inner wall of the shell is arranged in the shell. According to the invention, airflow containing pulverized coal is guided and redistributed through the guide mechanism, the uniformity of the amount of pulverized coal in different distribution pipes is improved, the combustion uniformity of the blast furnace is improved, the feed quantity sensing mechanism drives the feed quantity adjusting mechanism to move to adjust the opening size of the feed pipe, the stability of the reducing atmosphere in the furnace is guaranteed, and the production efficiency is improved. The quality and yield of molten iron are improved, and stable operation of the blast furnace is guaranteed.

The invention provides a blast furnace tank matching method, device and equipment and a storage medium, and the method comprises the steps that the working state of each iron notch in a target blast furnace and the position information of each empty tank are monitored, and the empty tanks are tank cars not loaded with molten iron; if the working state of the iron notch is in the open state, tank matching duration is calculated according to the real-time molten iron flow speed of the iron notch, and the tank matching number of each iron receiving line under the iron notch is determined according to the working state of the iron notch; according to the position information, the required predicted duration from each empty can to each iron receiving line of the iron notch is determined; and screening the empty tanks according to the tank matching quantity and the tank matching duration of each iron receiving line and the predicted duration of each empty tank, and determining a target empty tank corresponding to each iron receiving line so as to complete the tank matching of the target blast furnace. Therefore, the molten iron tanks are dynamically allocated and scheduled in combination with the real-time molten iron flow speed of the blast furnace, so that the tank allocation plan is more reasonable and efficient, and the dynamic change of the actual production requirement of the blast furnace can be met in time.

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 relates to the technical field of blast furnace ironmaking, in particular to a method for achieving rapid blow-in of a blast furnace through microwaves. The method specifically comprises the following steps that S1, microwave generators and waveguide tubes are installed on an iron notch, a tuyere, a bosh, the lower portion of a furnace body and the upper portion of the furnace body of the blast furnace, and an inner cavity of the furnace body serves as a heating cavity; s2, thermocouples are installed at the upper portion, the tuyere and the iron notch of the blast furnace and used for measuring the temperature of materials in the blast furnace; s3, after oven baking leakage testing is finished, charging is conducted, coke is filled below a bosh, light-load materials are filled from the bosh to the lower portion of the oven body, and normal materials are filled above the middle of the oven body; s4, all microwave generators are started to heat materials in the furnace, and the temperature of furnace charge on the middle-upper portion of the furnace body is controlled to be smaller than the temperature of furnace charge from the lower portion of the furnace body to the hearth; s5, during heating, steam or nitrogen is introduced into the furnace top for cooling; and S6, after the furnace burden is heated to a preset state, the microwave generator is turned off, and air supply blow-in is carried out. The device has the advantages of high heating speed, high efficiency and no pollution.

The utility model discloses an online monitoring device for the outer surface temperature of a blast furnace, including a blast furnace body, a mounting plug block and a mounting slot, and the mounting slot is provided at the upper end of a support base, a positioning splicing block and a positioning splicing slot are installed, a splicing plug block is fixedly connected to one side of the infrared thermometer, and a splicing slot is provided on the other side of the infrared thermometer. The online monitoring device for the outer surface temperature of a blast furnace can perform more comprehensive and uniform detection through annularly distributed temperature measuring probes, and the uniformity is better. In addition, the infrared thermometers can be conveniently inserted and spliced ​​through the splicing plug block and the splicing slot, and can be conveniently installed quickly and stably through the locking knob, the positioning splicing slot, the mounting plug block, the mounting slot and the positioning splicing block, so that independent disassembly and replacement can be conveniently performed. Moreover, the temperature measuring probe can be covered and protected through a protective lens, which plays a role of high temperature resistance, avoids being affected by high temperature, and is safer to use.

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 a control system for blast furnace top gas recovery. The control system comprises a period classification module, a threshold parameter acquisition module, a threshold parameter analysis module, a prediction parameter acquisition module and a prediction parameter analysis module. The method comprises the following steps: analyzing pressure data of monitoring points in a plurality of monitoring periods during gas recovery, and classifying the monitoring periods; calculating a threshold coefficient and an accident pressure threshold of the same type of cycle after classification; whether the accident pressure threshold needs to be adjusted and optimized or not is judged, and if yes, threshold optimization is carried out; analyzing the real-time change rate of the pressure value of the monitoring point and the historical pressure change curve of the same type of historical period to obtain a deviation degree value; comparing the deviation degree value with a deviation degree threshold value to generate a prediction signal; a prediction time value is obtained and analyzed, and whether a potential accident risk exists or not is judged; the flexibility of setting the pressure threshold is improved, and the method is more suitable for complex and changeable operation states in the blast furnace production process.

An intelligent blast furnace dust removal system relates to the technical field of environment-friendly dust removal and comprises a visual capture system and a DCS (distributed control system), the visual capture system is mounted at an iron outlet and a tank position swing chute of a blast furnace, and electric adjusting valves and pressure sensors are arranged at dust removal point pipelines and dust removal branch pipes of the blast furnace. The visual capturing system is electrically connected with an electric adjusting valve and a pressure sensor, the DCS system is electrically connected with the electric adjusting valve, the pressure sensor, the visual capturing system, a fan and a motor, and the DCS system is electrically connected with an upper computer. The system can accurately recognize and adapt to different working conditions, self-balance of the air volume of a pipe network and optimal air volume distribution are achieved, energy consumption is reduced, and dust removal efficiency is improved; meanwhile, the system operation strategy is continuously optimized through big data operation and deep learning, and the intelligent level is improved.

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.

To provide a state measuring system and a state measuring method in a blast furnace capable of measuring a state in the blast furnace so as to follow its change.SOLUTION: A state measuring system 1 in a blast furnace 100 includes: a first detector 10 and a second detector 20 arranged on both sides of a measurement target portion on a path 40 passing through the measurement target portion in the blast furnace 100; and a measuring device 30. The first detector 10 detects a cosmic ray particle flying along the path 40 before entering the measurement target portion as a flying particle. The second detector 20 detects the flying particle having passed through the measurement target portion as a transmitted particle. The measuring device 30 measures the time variation of a state of the measurement target portion on the basis of time variations of detection results of the flying particle and the transmitted particle.SELECTED DRAWING: Figure 2

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.

A method for determining the slag level of a blast furnace includes acquiring an image of a raceway (5) inside the blast furnace, the image being captured through a tuyere (2) by a camera (7) installed in front of the tuyere (2), the tuyere (2) being installed in a furnace wall (1) of the blast furnace, calculating an average brightness of the image, calculating a degree of raw ore dropping, which contributes to a reduction in the brightness of the image, based on the image, calculating a corrected average brightness by correcting the average brightness based on the degree of raw ore dropping, and determining the slag level based on the corrected average brightness.

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.