607results about "Checking devices" patented technology

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 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 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.

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 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.

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.

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.

Provided are a method and a device for measuring the molten material level in a blast furnace, which can accurately measure the molten material level in the blast furnace regardless of the operating conditions of the blast furnace. 【Solution means】The method for measuring the molten material level in a blast furnace according to the present invention includes: a measurement step of measuring the vibration frequency distribution in the height direction of the furnace body using a plurality of vibration meters arranged at predetermined intervals along the height direction of the furnace body of the blast furnace; a vibration intensity calculation step of calculating the vibration intensity in the frequency range derived from the blast using Fourier transform of the vibration frequency distribution; a numerical analysis step of calculating the maximum vibration intensity distribution in the lower part of the blast furnace including the furnace body steel skin, the in-furnace filling layer, the hearth bricks, and the solidified layer of the in-furnace molten material using a numerical analysis model with the molten material level and the blast volume in the blast furnace as variables; and a molten material level calculation step of calculating the molten material level at which the difference between the vibration intensity calculated in the vibration intensity calculation step and the maximum vibration intensity distribution calculated in the numerical analysis step is minimized, and setting the calculated molten material level as the position of the molten material level in the blast furnace.

This invention discloses a blast furnace ironmaking process monitoring method based on RBNCVA. First, a stacked denoising autoencoder (SDAE) is used to model historical blast furnace fault data, extracting robust wide nonlinear features. This feature helps to handle the complex nonlinearity of the blast furnace ironmaking process and is resistant to interference from noise and outliers. Then, a canonical variate analysis (CVA) method is used to analyze the relationship between past and future feature vectors to address the dynamic nature of the blast furnace. Finally, statistics are calculated using a probability density function obtained using kernel density estimation. This method reduces the false alarm rate in the blast furnace ironmaking monitoring process and significantly improves the fault detection rate and fault sensitivity.

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 utility model provides a collimating mirror positioning structure of a laser detection device, which comprises a laser emission mechanism, a laser transmission line and a collimating mirror, and is characterized in that the laser transmission line and the collimating mirror are fixed through a laser gun barrel; the collimating mirror penetrates through the laser gun barrel, extends out of the laser gun barrel and is fixed at the front end of the laser gun barrel through a collimating mirror positioning structure; the collimating lens positioning structure comprises a notch limiting ring and a positioning cap, the positioning cap is fixedly connected with the front end of the laser gun barrel through threads, and the interior of the positioning cap is used for accommodating the collimating mirror; the cross section of the notch limiting ring is roughly in a C shape, and the notch limiting ring is used for being laterally clamped on a laser transmission line in a sleeving mode. The notch limiting ring is clamped on the laser transmission line and sleeved with the laser gun barrel, and the flange at the tail end of the notch limiting ring abuts against a front end opening of the laser gun barrel, so that the stop collimating mirror is retracted into the laser gun barrel. Through the structure, the collimating mirror can be fixed at a corresponding position at the front end of the gun barrel.

The present invention provides an operation method and system for reducing taphole jamming. The operation method for reducing taphole jamming includes the following steps: S1: Control the drill jumbo to reach the corresponding position of the taphole, and align the drill bit of the drill jumbo with the center of the mud sleeve to initially drill and position the taphole passage; S2: Control the traveling motor to drill the drill bit of the drill jumbo towards the hearth direction, and at the same time control the high-pressure inert gas to purge the taphole passage; S3: Monitor the drilling depth and drilling speed of the drill bit of the drill jumbo, and the amount of broken taphole gun mud chips blown out from the taphole passage. By controlling the drilling of the drill bit and regulating the atomized water, the present invention reduces the probability of taphole jamming, reduces the taphole opening time, ensures the effective iron discharge time of the taphole, improves the on-time rate and one-shot drilling rate of the taphole, reduces the number of times of blowing oxygen at the taphole, reduces the labor intensity of workers, facilitates the timely discharge of slag and iron, and creates conditions for the long-term stable and smooth operation of the blast furnace.

The invention provides a blast furnace tap hole splashing detection method and equipment, and belongs to the technical field of metallurgy and image data processing. The blast furnace tap hole splashing detection method comprises the steps that historical image data of a blast furnace tap hole at the tapping moment are collected; labeling historical image data according to a splash detection category, and generating a splash clustering anchor frame corresponding to the labeled data in combination with a clustering algorithm; constructing a target detection model with an attention mechanism, and setting a loss function according to a splash detection category and a splash clustering anchor frame; training a target detection model by using the historical image data and the annotation data so as to learn spattering features corresponding to the spattering clustering anchor frame in combination with an attention mechanism until a loss function converges; acquiring current image data of the blast furnace tap hole in real time; and inputting the current image data into the target detection model, and outputting a splashing detection result corresponding to the splashing of the blast furnace tap hole. The problems that in the prior art, blast furnace tap hole splashing detection precision is low, missing detection exists, and the false alarm rate is high can be solved.

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.

Device for determining the topography of the burden surface in a shaft furnace (10) with a radar device (20) scanning the burden surface (18) with an antenna device (22, 35, 37, 43) which is arranged in the region of a furnace cover (13), wherein the antenna device is arranged on a rotation axis (24) inclined at an angle of inclination α with respect to a vertical axis (15) of the shaft furnace and is rotatable about the rotation axis by means of a drive device, characterized in that the antenna device is designed such that a main axis direction H of the radar radiation substantially coincides with the rotation axis and a beam opening angle β of the antenna device forms a radar fan (28) which enables the impact of the burden surface along a profile line p between the vertical axis (15) and a furnace wall (19) of the shaft furnace, wherein the antenna device is designed such is rotatable,that the radar fan (28) formed by the emitted radar radiation of the antenna device impinges on the burden surface along the profile line p and, when the antenna device rotates about the rotation axis by 360°, sweeps over the entire burden surface.

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.

The invention discloses an efficient and energy-saving furnace front water cooling plate cooling system. The furnace-front water-cooling plate cooling system is characterized by comprising a circulating water tank, a plurality of groups of water-cooling plates, a water return tank and a concentrated brine tank which are connected through pipelines. Through the application of the system, the peripheral temperature of the iron notch can be reduced to 70-90 DEG C from 100-120 DEG C, and the temperature reduction amplitude reaches 30%. The damage to peripheral equipment of the iron notch caused by high temperature can be greatly avoided; meanwhile, the temperature above the iron notch is reduced to about 120 DEG C from 200-300 DEG C, a steel structure above the iron notch can be well protected, deformation caused by high temperature is avoided, and the bearing capacity of the steel structure meets the weight requirement of tuyere equipment for replacing a mechanical forklift and a sleeve replacing machine. By the adoption of the cooling system, water resources can be utilized to the maximum extent, and the effects of energy conservation and emission reduction are achieved.

The invention relates to the technical field of blast furnace ironmaking, in particular to a leak detection method for rotational flow degassing of a blast furnace soft water cooling system, which comprises the following steps of: 1, testing the concentration of CO gas exhausted by a vertical rotational flow degassing tank in the blast furnace soft water cooling system; 2, when the concentration of CO gas exhausted by the vertical cyclone degassing tank is larger than 11%, a water return valve is closed firstly, then a water inlet valve is closed, and then the pressure in a pipeline between the water return valve and the water inlet valve is monitored; 3, the pipelines with internal leakage or external leakage are changed to be communicated with industrial water, the other pipelines are changed to be spanning pipes, the pipelines with internal leakage or external leakage are spanned, and soft water cooling is recovered; and 4, testing the concentration of the CO gas discharged by the vertical cyclone degassing tank in the blast furnace soft water cooling system again. Cooling water and blast furnace gas in a blast furnace soft water cooling system are separated by using the vertical cyclone degassing tank, so that the separation efficiency of the blast furnace gas is improved; the pipeline with internal leakage or external leakage is changed to be communicated with industrial water, so that the cooling efficiency of other branch pipes without water leakage in the cooling wall is ensured.