61results about "Blast furnace components" patented technology

A blast furnace lining has an upper stack portion, an intermediate bosh portion, and a hearth portion, and can have a bottom pad portion. At least part of the hearth portion has an outer layer of a first refractory material having a thermal conductivity of at least about 16 W / m-k and an inner layer of a second refractory material having an iron erosion index of less than 1% and a thermal conductivity of at least about 8 W / m-K. Also provided are a blast furnace lined with the blast furnace lining, and a method for lining a blast furnace.

This invention belongs to the field of blast furnace ironmaking technology and discloses an operation method for discharging low-temperature slag and iron from the taphole, including: S1, detecting the temperature of the molten iron discharged from the taphole; when the temperature of the molten iron is lower than a first preset temperature, using a taphole opener to open a closed portion of the taphole; S2, removing the taphole opener, simultaneously introducing an oxygen-burning pipe and a compressed air blowing pipe into the taphole, introducing oxygen into the oxygen-burning pipe and igniting the oxygen pipe until the taphole is fully open; S3, shutting off the oxygen supply and removing the oxygen-burning pipe; S4, adding combustion-supporting powder into the compressed air blowing pipe and introducing compressed air; S5, gradually pushing the compressed air blowing pipe into the taphole until the length of the compressed air blowing pipe outside the taphole is equal to the safe length; S6, replacing with a spare compressed air blowing pipe and introducing it into the taphole, repeating S4 and S5 until all slag and iron are discharged from the taphole. This operation method can effectively discharge low-temperature slag and iron at a relatively low production cost and has good safety.

A method for removing deposits from the walls of a smelting furnace and a method for operating a smelting furnace are proposed. The method for removing deposits from the walls of a smelting furnace, in which the upper surface of the charge loaded into the smelting furnace is lowered to the lower part of the deposits, the deposits are exposed, and water is sprayed on the exposed deposits to remove the deposits. The method is preferably adjusted in such a way that the spraying is performed intermittently with intervals between the spraying and the spraying, the spraying time, the interval time, the spraying flow rate, and the total spraying amount per spraying are adjusted to maintain a predetermined furnace heat level, and the removal of the deposits is performed. The method for operating a smelting furnace includes a deposit removal process in which the charge loaded into the smelting furnace is reduced to the lower part of the deposits during operation or during a blowdown period, and the deposits on the walls are removed by the above-mentioned method for removing deposits from the walls of a smelting furnace.

The utility model discloses a coal gas pressure stabilizing control device for a blast furnace coal injection and pulverizing system. A waste gas pipeline is provided with a waste gas fan, a waste gas electric regulating valve, a waste gas flowmeter and a waste gas pressure transmitter; a coal mill inlet temperature thermal resistor and a coal mill inlet pressure transmitter are arranged on the outlet pipeline; a coal gas pressure transmitter, a coal gas flowmeter and a coal gas electric control valve are arranged on the coal gas pipeline, and an outlet temperature thermocouple and an outlet pressure transmitter are further arranged on the outlet pipeline; a waste gas carbon monoxide detector and a waste gas oxygen content detector are arranged on the waste gas pipeline; and a gas pneumatic quick switching valve, a gas electric blind plate valve, a gas electric butterfly valve and a carbon monoxide heat conduction type gas analyzer are arranged on the gas pipeline, and the number of the gas electric control valves is larger than or equal to two. According to the utility model, the gas regulating valve or the bypass pipeline three-valve group is additionally arranged, so that a monitoring instrument is perfected, and the gas flow and pressure are accurately controlled.

The application relates to a burden structure, which comprises: 3.94-37.07% of full-secret fine powder sinter, 2.63-55.89% of common sinter, and 40-60% of acid pellet; the full-secret fine powder sinter comprises: 54-55% of TFe, 16.11-17.11% of CaO, 2.95-3.35% of SiO2, 1.0-1.5% of Al2O3, and 1.07-2.07% of MgO; the full-secret fine powder sinter has a reduction disintegration index, and the proportion of the particle size greater than 6.3 mm is 94-95%; when the burden structure is used for smelting, the proportion of the acid pellet can be greater than 40%, and the furnace-in grade can be greater than 60%; the burden structure has good low-temperature disintegration, reduction degree and molten drop performance when smelting; and the burden structure breaks the limitation that alkali pellet must be used for developing high-proportion pellet blast furnace smelting technology.

This application discloses a blast furnace blower power generation system, including a blower, a blast furnace, a first venting tower, a power generation unit, and a second venting tower. The blower supplies cold air; the blast furnace is connected to the blower, and at least one first valve is provided between the blast furnace and the blower to regulate the flow rate of the cold air flowing into the blast furnace; the first venting tower is connected to the blower, and at least one second valve is provided between the first venting tower and the blower to regulate the flow rate of the cold air flowing into the first venting tower; the power generation unit is connected to the blower, and at least one third valve is provided between the power generation unit and the blower to regulate the flow rate of the cold air flowing into the power generation unit; the second venting tower is connected to the outlet of the power generation unit, and at least one fourth valve is provided between the second venting tower and the power generation unit to regulate the flow rate of the air flowing into the second venting tower. This solves the technical problem of large energy loss in existing blast furnace systems.

This invention relates to the field of blast furnace ironmaking technology, and more particularly to a hydraulic mud gun machine with a stable support structure. It includes a base, a drive assembly mounted on the base, a hydraulic cylinder mounted on the drive assembly, a mud storage cylinder fixedly connected to the hydraulic cylinder, and a main mud discharge pipe fixedly connected to the mud storage cylinder; circumferentially distributed sliding plates, all slidably connected to the main mud discharge pipe, and each circumferentially distributed sliding plate slidably connected to a connecting rod; and a blocking ring fixedly connected to the circumferentially distributed connecting rod, with a guide plate fixedly connected to the blocking ring. This invention uses the blocking ring, guide plate, and connecting rod to form a pre-positioned component. When the pre-positioned component is placed inside the blast furnace, and the mud comes into contact with it, the component and the mud are compressed against each other. The mud flows out from the gap between the blocking ring and the main mud discharge pipe, ensuring uniform contact between the mud and the taphole, creating a more stable contact and forming a reliable "mud bag," thus reducing the possibility of the taphole opening spontaneously.

The present application relates to the technical field of blast furnace smelting operation, and a method for preventing collapse of a blast furnace. The method is aimed at determining the possibility of collapse of the blast furnace by accurately predicting the change trend of the operation parameters of the blast furnace. On this basis, the collapse mechanism of the blast furnace is scientifically utilized, the existing conditions of the blast furnace are reasonably utilized, the best operation opportunity is grasped, the coke is reasonably placed at a reasonable position, the possibility of central collapse is eliminated, the air volume is timely controlled, the air flow distribution is adjusted, the energy distribution is optimized, the edge stagnation space is digested, the fast and slow changes of the material speed are waited, the central coke amount is timely adjusted, and then the air is added, so as to fundamentally eliminate the collapse. The use of the method can greatly reduce the smelting cost, eliminate the adverse effects of the collapse on the furnace body and the air supply system (especially the tuyere), avoid other derivative adverse effects caused by the suspended material after the collapse, and avoid the influence of the collapse on the production capacity and product quality.

The utility model relates to blast furnace pig iron field, concretely is a kind of blast furnace pulverized coal injection pressure relief system.A kind of blast furnace pulverized coal injection pressure relief system, including injection tank (1) and coal powder bin (2), coal powder bin (2) is located in the side of injection tank (1), still include first pressure relief branch pipe (31), second pressure relief branch pipe (32), bypass pipe (33), main pressure relief pipeline (34), pressure relief cut-off valve (41), regulating valve (42), big pressure relief valve (43), micro pressure relief valve (44), pressure sensor (5) and controller (6), the air inlet of first pressure relief branch pipe (31) is connected the top 1# gas delivery end of injection tank (1), pressure relief cut-off valve (41) and regulating valve (42) are sequentially connected on first pressure relief branch pipe (31), big pressure relief valve (43) is connected in parallel by bypass pipe (33) and regulating valve (42);The air inlet of second pressure relief branch pipe (32) is connected the top 2# gas delivery end of injection tank (1), micro pressure relief valve (44) is connected on second pressure relief branch pipe (32).The utility model is high in efficiency, long in life, protects environment.

An ignitor cap for a thermal lance including a proximal end adapted to receive the thermal lance, a distal end, a housing having a sidewall extending from the proximal end to the distal end and defining a passageway, and primary fuel and secondary fuel disposed within the passageway. At least a portion of the primary fuel is in contact with the secondary fuel and / or the distal end is substantially sealed and the proximal end includes at least one opening such that, when the thermal lance is received in the proximal end of the ignitor cap, gas flows axially through the primary fuel and the secondary fuel, and is then redirected by the sealed distal end back through the primary fuel and the secondary fuel and out through the at least one opening and along an exterior surface of the thermal lance. Also, thermal lances including such an ignitor cap.

The refractory for a melting furnace wall according to an embodiment of the present invention comprises: 70-85 wt% Al2O3; 3-15 wt% SiC; and 5-15 wt% C.

This invention relates to the field of hydraulic mud gun technology, specifically to a novel hydraulic mud gun with visualized mud output and its working principle. It includes an adjustment structure, a mud gun structure, and a display structure positioned between the adjustment structure and the mud gun structure. The adjustment structure includes two sets of base frames, a fixed base and a deflection base mounted on the top base frame, a deflection arm mounted on the deflection base, and a support arm fixed to the end of the deflection arm. The top of the fixed base is fixedly connected to a mounting plate in the display structure. The mud gun structure includes a mud gun tube and a connecting arm fixed to the outer wall of the mud gun tube. An external power device is precisely matched with a drive rod via a single-sided trunnion to ensure stable power transmission. The outer thread of the drive rod engages with two sets of positioning block threads with opposite rotation directions, precisely converting the rotation of the drive rod into the axial relative movement of the positioning blocks, thereby driving the deflection arm, support arm, and connecting plate in linkage to achieve precise adjustment of the mud gun tube's posture.

To provide a novel hydrogen heating apparatus for blast furnace, a hydrogen heating method for blast furnace and a blast furnace operation method in which a generation amount of CO2 can be suppressed even if hydrogen-based gas is used as reducing gas.SOLUTION: A hydrogen heating apparatus for blast furnace 11 comprises: a sealed container 15 into which hydrogen-based gas is introduced; a heat generator 14 which is provided inside sealed container 15, and generates heat by storage and emission of hydrogen; and a temperature adjustment part which adjusts the temperature of the heat generator 14; where the heat generator 14 has one or more laminates 14a that consist of a support body 61 which is formed of at least any one of a porous body, a hydrogen permeable membrane, and a proton conductor, and a multilayer film 62 supported by the support body 61, the multilayer film 62 has: a first layer which is formed of hydrogen storage metal or hydrogen storage alloy, and has the thickness of less than 1000 nm; and a second layer which is formed of hydrogen storage metal, hydrogen storage alloy or ceramics different from the first layer, and has the thickness of less than 1000 nm, and hydrogen-based gas is heated to a predetermined temperature by heating by heat generator 14.SELECTED DRAWING: Figure 5

The application relates to the technical field of oxygen lances, and provides an iron hole oxygen lance for blowing in a blast furnace, which comprises a lance body and an inner pipe, the inner pipe is arranged in the lance body, the lance body is connected with a first gas supply pipe, the first gas supply pipe is provided with a first control valve and a second control valve, the inner pipe is connected with a second gas supply pipe, the second gas supply pipe is provided with a third control valve, a communication pipe is arranged between the first gas supply pipe and the second gas supply pipe, the communication pipe is located between the first control valve and the second control valve, the communication pipe is provided with a fourth control valve, a thermocouple monitoring device is arranged on the outer side of the inner pipe, and the thermocouple monitoring device is located on the inner side of the lance body. The oxygen lance provided by the application adopts a sleeve structure, one-way compressed air directly enters the inside of the lance body and is used for cooling the inner pipe, one-way compressed air enters the inside of the second gas supply pipe through the communication pipe, the compressed air and oxygen are mixed and then enter the inside of the inner pipe, so that the use amount of oxygen is reduced, and cost is saved.

A system for processing coke oven gas (COG), in particular coke oven gas produced by a steel plant, the system being configured to receive a coke oven gas stream. The innovative system comprises a compression unit (100) configured to receive the coke oven gas stream, compress the coke oven gas stream and discharge a compressed coke oven gas stream; a separation unit (200) configured to receive the compressed coke oven gas stream, perform a hydrogen (=H2) separation and discharge a hydrogen stream and a gas stream comprising methane (=CH4) and other unreacted components of the coke oven gas stream; a pyrolysis unit (300) configured to receive the gas stream comprising methane and other unreacted components of the coke oven gas stream and perform a pyrolysis of the stream comprising methane and other unreacted components of the coke oven gas stream to discharge a solid carbon (=C) and a gas stream comprising hydrogen and other unreacted components of the coke oven gas stream.

A carbon dioxide recovery system includes: an iron-making facility; a gas turbine that drives a turbine with a combustion gas generated by combusting a first gas discharged from the iron-making facility; a heat exchanger that exchanges heat between a second gas discharged from the turbine of the gas turbine and a heat medium; and a carbon dioxide recovery device that recovers carbon dioxide from the second gas that has exchanged heat with the heat medium. The carbon dioxide recovery device includes: an absorption tower that causes carbon dioxide to be absorbed in an absorption liquid by bringing the second gas and the absorption liquid into contact, a regeneration tower that heats the absorption liquid to release the carbon dioxide, and a reboiler that heats the absorption liquid by exchanging heat between the absorption liquid and the heat medium that has exchanged heat with the second gas in the heat exchanger.

The utility model relates to the technical field of anti -blocking device, concretely is a blast furnace coal injection branch pipe anti -blocking device, including the connecting pipe and motor, the inner side wall top fixed connection of connecting pipe has the fixed plate, the outer side wall bottom of fixed plate is connected with the rotation lever through the sealed bearing rotation, the left end fixed connection of rotation lever has the rotary seat, the even fixed connection of rotary seat's outer side wall has the dispersing rod. The utility model drives the driving bevel gear, driven bevel gear and rotation lever to rotate through motor work, and rotation lever drives rotary seat and dispersing rod fast rotation, can scatter the caked coal powder when the coal powder enters the coal injection branch pipe, simultaneously, and the rotation lever drives the connecting rod and the scraper lever to rotate when rotating, can repeatedly scrape the coal powder of coal injection branch pipe inner wall, prevent the coal powder accumulation, avoid causing the blockage, and the hot air that the electric heating tube blows down can dry the coal powder with the help of the blower fan cooperation, further reduce the risk that the coal powder caking blocks, reduce the time that the pipeline dredges to stop operation, improved work efficiency.

A method of operating an industrial installation comprising a source of blast furnace gas, a coke dry quenching unit and a sorption-enhanced water-gas shift reactor, the method comprising the ordered steps of: (a) feeding a stream of blast furnace gas from the source of blast furnace gas to a cooling chamber of the coke dry quenching unit to quench coking reaction; (b) collecting a stream of enriched blast furnace gas exiting the cooling chamber; and (c) feeding the collected stream of enriched blast furnace gas to the sorption-enhanced water gas shift reactor thereby producing a CO2- rich stream and a H2-rich stream.

This utility model discloses a blast furnace front scrap iron feeding device, including a forklift and a baffle. The forklift has two forks, and the baffle includes a main plate and a base plate. The base plate is inclined towards the back of the main plate. Two tubular arms are provided on the back of the main plate, each corresponding to one of the forklift's two forks. The forklift's forks are inserted into the corresponding tubular arms. Side plates are fixed to both sides of the baffle, and the two side plates and the baffle form a U-shaped body with an opening. The opening and the tubular arms are located on opposite sides of the baffle. This utility model blast furnace front scrap iron feeding device, by setting the baffle and using the forklift to feed scrap iron, saves time and labor, has high feeding efficiency, saves labor costs, and avoids the safety hazards caused by manual operation in high-temperature environments. Furthermore, the forklift is easy to use, eliminating the need for a separate, accurate, and dedicated feeding device, greatly saving equipment costs.

The utility model relates to a blast furnace coal powder injection jar belongs to coal powder injection technical field, solve the technical problem that the gas direction is inconvenient to adjust when the coal powder injection at present, the blast furnace coal powder injection jar includes jar body, injection pipe, injection head and adjusting part, jar body is used for carrying out injection to coal powder, one end of injection pipe is linked with gas source, and the other end of injection pipe is linked with jar body, and the gas is passed into jar body, injection head is installed in the one end of injection pipe close to jar body, and injection head is located in jar body, adjusting part is rotatably installed in injection head, and adjusting part has the passage for the gas through between injection head, adjusting part rotates to adjust the passage position, and then to adjust the air direction through injection head. Therefore, the blast furnace coal powder injection jar changes the air direction of injection head to jar body, thereby realizing the coverage of the air direction to the larger range in jar body, to better satisfy the injection of coal powder in different positions.

This invention discloses a method and system for optimizing and controlling the combustion state of hydrogen-rich gas in the blast furnace swirl zone, relating to the field of blast furnace smelting technology. This invention constructs a basic correlation mechanism model by monitoring physical, chemical, and furnace condition field correlation data in the swirl zone, combined with hydrogen-rich combustion kinetic equations and fluid dynamic characteristics. The mechanism model is then corrected in real time using an LSTM network to generate a hybrid prediction model combining mechanism and data. A multi-objective optimization function is set, targeting combustion efficiency, temperature field uniformity, and furnace condition adaptability, and solved using the NSGA-III algorithm to obtain a dynamic prediction model for hydrogen-rich combustion. Based on a graded control strategy, and combined with a PID algorithm, the deviation between predicted and measured values ​​is compared, and the control parameters are dynamically corrected in stages to achieve precise optimization of the hydrogen-rich combustion state in the blast furnace swirl zone. This method and system effectively solve problems such as low combustion efficiency, uneven temperature distribution, and unstable furnace conditions in the original process by optimizing and controlling the injection pipe and injected gas, and has broad application value.

Title: Process and apparatus for separating waste gas from a ferrous metal production unit. An apparatus for separating waste gas from a ferrous metal production unit comprises a first adsorption unit (4) for separating the waste gas by pressure-switching adsorption to produce a gas (5) depleted in carbon monoxide and hydrogen and enriched in CO2 relative to the waste gas and a first gas (7) enriched in carbon monoxide and hydrogen and depleted in CO2 relative to the waste gas, a partial condensation and / or distillation separation unit (CC), means for sending the CO2-enriched gas to the partial condensation and / or distillation separation unit (CC) to produce a CO2-rich fluid (14), a second adsorption unit (6),means for sending at least a portion of the CO-enriched gas to separate by temperature-toggle adsorption in the second adsorption unit (6) to form a gas (23) enriched in CO2 relative to the first CO-enriched gas at a first pressure and a second gas (15) enriched in CO and hydrogen relative to the first CO-enriched gas, the second gas containing nitrogen, a separation unit (CB) by partial condensation and / or washing and / or distillation, means for sending at least a portion of the second gas (15) enriched in CO and hydrogen to the separation unit (CB) to be separated there to produce a gas (17) depleted in nitrogen and enriched in CO relative to the second gas. Abstract figure: Figure 3,

The application discloses a mud gun mechanism and relates to the technical field of ore smelting furnaces.The mud gun mechanism comprises a barrel, an extension cylinder, a piston assembly and a mud blocking structure; one end of the barrel is a mud outlet, the other end is used for mounting the mud blocking structure, and the piston assembly is slidably connected in the barrel; the cylinder body of the extension cylinder is connected with the barrel through the mud blocking structure, the piston rod of the extension cylinder is arranged in the mud blocking structure and is connected with the piston assembly; the mud blocking structure is tightly combined with the outer circumferential surface of the piston rod of the extension cylinder through a sealing sleeve, so that no mud can enter the extension cylinder from the piston rod to contaminate the hydraulic oil, and the mud entering the extension cylinder can be effectively prevented.

The invention belongs to the technical field of blast furnace ironmaking, and particularly discloses a blast furnace condition graded recovery control system which comprises a data acquisition and monitoring module, a data analysis module, an execution module, a dynamic regulation and control feedback module and an emergency processing module. The blast furnace monitoring system is used for monitoring and collecting blast furnace parameters in real time, judging the blast furnace condition grade, adjusting the blast furnace parameters, monitoring the blast furnace condition state after parameter adjustment and conducting early warning on abnormal working conditions. Aiming at the problems of low recovery efficiency and long recovery period of the current furnace condition, the method realizes rapid identification and efficient recovery of the furnace condition fluctuation by carrying out accurate grading judgment on the furnace condition and matching a differentiated and refined parameter adjustment strategy, and solves the problem that the furnace condition fluctuation is difficult to recover when the furnace condition fluctuation treatment is carried out in the blast furnace smelting process. As parameter adjustment depends on artificial experience, the furnace condition recovery efficiency is low, the period is long, and the stable operation of the blast furnace is influenced.

A method for reducing a material containing metal oxides, wherein a reducing gas obtained by utilizing ammonia (NH3) and a carbon-containing gas is used. In the production of the reducing gas, a first gas stream containing ammonia is subjected to ammonia cracking, thereby producing a cracked gas stream. A second gas stream containing carbon is reformed, thereby producing a reformed gas stream. At least a portion of the cracked gas stream and at least a portion of the reformed gas stream are combined. The heat generated during the reforming process is provided to the ammonia cracking. An apparatus (10) for reducing a material containing metal oxides includes: a reduction unit (30), a reducing gas input line (40) leading to the reduction unit (30), a first gas stream line (50) for ammonia-containing gas, a second gas stream line (70) for carbon-containing gas, an ammonia cracking unit (60), a reforming unit (80), a cracked gas stream line (61), a reformed gas stream line (81), and a combined gas stream line (90). A first gas flow line (50) leads into the ammonia cracking unit (60), and a second gas flow line (70) leads into the reforming unit (80). A cracked gas flow line (61) extends from the ammonia cracking unit (60), and a reformed gas flow line (81) extends from the reforming unit (80). The cracked gas flow line (61) and the reformed gas flow line (81) are connected to a combined gas flow line (90). A heating device (100) is provided to supply the heat generated during the reforming process in the reforming unit (80) to the ammonia cracking unit (60).

This utility model belongs to the field of blast furnace oxygen supply technology, specifically relating to an oxygen supply system. The oxygen supply system includes: a pressure swing adsorption (PSA) oxygen generator station; a cryogenic oxygen generator station; a first connecting pipe, one end of which is connected to the PSA oxygen generator station and the other end of which is connected to the blast furnace; and a second connecting pipe, one end of which is connected to the cryogenic oxygen generator station and the other end of which is connected to the first connecting pipe.

This invention provides a hydrogen production method and system that utilizes an efficient electrochemical pathway. [Solution] A method for producing hydrogen is provided, comprising introducing metal blast furnace effluent gas or basic oxygen converter (BOF) effluent gas or a mixture thereof into an electrochemical (EC) reactor, wherein the EC reactor is equipped with a mixed conductive membrane. In one embodiment, the method comprises introducing vapor into the EC reactor on one side of the membrane, with the effluent gas on the opposite side of the membrane, and the effluent gas and vapor being separated by the membrane and not in contact with each other.

The application provides a method and system for smelting by gasification co-production of reducing gas and biomass char, belonging to the field of blast furnace smelting. The method comprises: capturing carbon dioxide from blast furnace gas to obtain carbon dioxide gas and upgraded gas; carrying out gasification reaction of biomass raw material and carbon dioxide gas to obtain crude synthesis gas and biomass char; carrying out tar cracking and reforming of the crude synthesis gas to obtain refined synthesis gas; mixing and heating the refined synthesis gas and the upgraded gas to obtain high-temperature reducing gas; delivering the high-temperature reducing gas to a blast furnace tuyere for hydrogen-rich gas injection; and mixing and pulverizing the biomass char and blast furnace injection coal, and using the mixture for blast furnace injection. The carbon-neutral biomass resources and the carbon dioxide obtained by the carbon capture unit are efficiently converted into high-quality reducing gas, which is used for hydrogen-rich injection of the blast furnace, thereby reducing fuel consumption of the blast furnace smelting system, realizing recycling of carbon dioxide resources, and achieving the effect of reducing carbon dioxide emission.

The application discloses a kind of blast furnace humidity automatic regulating method, device, equipment and storage medium.The method is executed by the blast furnace equipment with first humidification steam pipeline and second humidification steam pipeline, comprising: obtaining preset humidity information, and judging whether the current target blast furnace exists furnace changing operation;According to the blast pressure difference and current atmospheric humidity, determine the current air humidity adjustment value, and obtain the adjustment dead zone width according to the current air humidity adjustment value;According to the current atmospheric humidity, target blast humidity and current blast humidity, obtain air humidity difference value;According to the size relationship of air humidity difference value and adjustment dead zone width, the opening of first humidification steam pipeline and / or second humidification steam pipeline is adjusted, to automatically regulate the blast furnace humidity.Through the technical scheme of the application, the automatic regulation of blast furnace humidity can be realized, and the control precision and regulation speed of blast furnace humidity are improved.