290results about "Cooling 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 utility model discloses a blast furnace castable cooling wall, which relates to the technical field of blast furnace body cooling equipment and comprises a cooling wall base body, a cooling water pipe is arranged inside one side of the cooling wall base body, and a protective sleeve is sleeved on the side surface of the cooling water pipe extending out of the cooling wall base body; dovetail-shaped grooves are vertically formed in the side face of the other side of the cooling wall base body at intervals, anchoring parts are transversely arranged in the dovetail-shaped grooves at intervals, the anchoring parts in every two adjacent dovetail-shaped grooves are vertically arranged in a staggered mode, and a pouring layer is poured on one side of the dovetail-shaped grooves of the cooling wall base body; the blast furnace cooling wall has the beneficial effects that the part of the cooling water pipe pre-embedded in the cooling wall base body is protected by the protective sleeve, the casting technology of the blast furnace cooling wall hot surface after casting molding can adopt on-site integral casting construction, and the casting material is integrally cast on the hot surface of the cooling wall, so that the problems of falling and damage of refractory bricks, complex construction process and low construction cost in the past can be avoided. And the slag adhering capacity is high, the overall performance is good, and the device can adapt to large blast furnace body cooling working conditions.

The utility model discloses a hydrogen-rich gas fuel self-preheating injection blast furnace. The system at least comprises a blast furnace; a blowing pipe is arranged on the blast furnace; a heat exchange cooling wall is arranged on the inner side of the blast furnace above the injection pipe; a cooling water pipe is arranged on the side, close to the blast furnace shell, of the heat exchange cooling wall; a heat exchange coil pipe is arranged on the side, far away from the blast furnace shell, of the heat exchange cooling wall; the air inlet end of the heat exchange coil pipe is led out from the side wall of the blast furnace and is communicated with a hydrogen-rich gas fuel supply pipe; and the gas outlet end of the heat exchange coil pipe is led out from the side wall of the blast furnace and is communicated with a hydrogen-rich gas fuel gas inlet pipe of the injection pipe. The hydrogen-rich fuel gas firstly enters the blast furnace body, is preheated to a certain temperature by utilizing waste heat at the middle upper part of the blast furnace body, and then is uniformly injected into the blast furnace body from the injection pipe, so that the consumption of coke and pulverized coal per ton of iron of the blast furnace can be reduced. Meanwhile, the overall temperature of the cooling wall is reduced, and the service life of the heat exchange cooling wall is prolonged.

The invention discloses a blast furnace pulverized coal electromagnetic preheating system and process, and relates to the technical field of blast furnace ironmaking. The blast furnace pulverized coal electromagnetic preheating system comprises a pulverized coal bin, an injection tank and a mixer, a radial flow guide device is arranged at the inlet end in a rough preheating pipeline, and the radial flow guide device is used for separating materials according to the diameter and guiding the materials to move on the inner wall of the radial rough preheating pipeline; the intermediate heating device is used for forming a heating channel and heating materials moving along the middle of the coarse preheating pipeline, and a dispersing device is arranged at the outlet end of the coarse preheating pipeline and used for dispersing the materials with different particle sizes to different areas and conveying the materials into the fine preheating pipeline. According to the blast furnace pulverized coal electromagnetic preheating system and process, powder moisture is removed through coarse preheating, powder with different particle sizes is guided to be separated and move towards the inner wall of the coarse preheating pipeline, materials with different particle sizes are dispersed to different areas through fine preheating, and the powder reaches the temperature close to an ignition point.

The invention relates to a tool for mounting a cooling wall of a blast furnace and a using method of the tool, and belongs to the technical field of blast furnace mounting equipment.The tool comprises a bottom plate fixedly provided with a fixing column extending in the vertical direction; the rotary sleeve is rotationally arranged on the fixed column in a sleeving manner; the locking assembly is mounted between the rotating sleeve and the fixed column, and the locking assembly is used for locking the rotating sleeve to the fixed column; the manual telescopic rod is provided with a fixed end and a telescopic end, the fixed end is hinged to the outer wall of the rotating sleeve, the telescopic end is used for abutting against the cooling wall to be installed, the manual telescopic rod is connected with a rotating driving part, and the rotating driving part is used for driving the manual telescopic rod to rotate in the vertical plane; according to the application method, the tool is used for assisting an operator in mounting the cooling wall on the inner wall of the blast furnace. Through the structure, the tool can assist an operator in quickly mounting the cooling wall on the inner wall of the blast furnace, and is simple in structure, convenient to use, very low in manufacturing cost and use cost and higher in use safety.

To provide a construction method of a cooling stave capable of bringing the cooling stave into close contact with an iron shell, and the cooling stave.SOLUTION: The method of installing the cooling stave includes a stave body provided with a cooling pipe through which a cooling fluid flows, a refractory layer formed of a refractory on one surface of the stave body, and a wall portion formed of a refractory on a peripheral edge portion of the refractory layer, and includes a fixing step (step S4) of fixing the stave to the shell of the blast furnace by pressing the wall portion against the shell in a deformable state of the refractory forming the wall portion.SELECTED DRAWING: Figure 1

The invention discloses an integral pouring method and structure of a blast furnace hearth for replacing a cooling wall. A lining body formed by integrally pouring a high-thermal-conductivity amorphous refractory material is directly arranged on the inner side of a furnace shell; a plurality of hole channels are formed in the furnace shell, cooling elements are arranged in the hole channels, one end of each cooling element is embedded into and penetrates through the lining body and is in close contact with the lining body, a cooling wall is omitted, air gap thermal resistance is avoided, the cooling elements are in direct contact with a high-thermal-conductivity refractory material, heat can be quickly and directly transmitted to a cooling system, and the cooling efficiency is greatly improved; a protective slag iron shell is easily formed on the hot surface of the hearth; the overall pouring structure is free of brick joints, and permeation erosion of molten iron and alkali metal is avoided; the high thermal conductivity ensures that the temperature field of the hearth lining is uniformly distributed, the thermal stress is small, and the ring crack risk of a traditional structure is fundamentally eradicated; if abnormal erosion occurs in a local area, online repair can be performed by adopting a press-in technology, so that the maintenance cost is low, and the service life of the first-generation blast furnace is prolonged.

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

The invention relates to the technical field of blast furnace water-cooled walls, in particular to a metallurgical compounded copper-steel bimetal blast furnace water-cooled copper wall, which comprises a cooling wall, a water channel, a water inlet pipe and the like, the cooling wall consists of a hot surface and a cold surface, the hot surface is made of copper material, the cold surface is made of steel material, and the water channel for circulating cooling liquid is arranged in the cooling wall. A water inlet pipe and a water outlet pipe which are communicated with the water channel are arranged on the cold face, the hot face made of copper and the cold face made of steel are composited through metallurgy, and the combination faces are completely composited. According to the method, 100% bonding of the bonding surfaces of the copper plate blank and the steel plate blank is achieved in a metallurgical compounding mode, the bonding strength is high, the bonding surfaces cannot be separated in the using process of a blast furnace, and the service life is prolonged; through the copper-steel double-metal compounding mode, the use amount of copper is reduced, the manufacturing cost is reduced, the overall strength of the product is improved, and the product is not prone to being cracked up and deformed in the transportation, hoisting and using processes.

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 utility model relates to the technical field of slag runner water cooling, in particular to a blast furnace casting house slag runner water cooling device which comprises a plurality of water cooling plates used for cooling the two side portions and the bottom of a slag runner in a water cooling mode. The water cooling plate comprises a shell, a cooling channel which is arranged in the shell and enables cooling water to flow back and forth in the shell, a water inlet communicated with one end of the cooling channel, and a water outlet communicated with the other end of the cooling channel. The plurality of water cooling plates are spliced and fixed together through connecting structures; the water-cooling plate has the beneficial effects that in actual use, the shell is attached to the side part and the bottom of the slag runner, namely, the two side parts and the bottom of the slag runner are cooled, so that the cooling effect of the water-cooling plate on the slag runner is ensured; meanwhile, the multiple water cooling plates are spliced together to form a pouring frame, pouring can be directly carried out on the water cooling plates to form the slag runner, the slag runner and the water cooling plates are tightly combined, heat conduction between the slag runner and the water cooling plates is facilitated, and the cooling effect is improved.

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.

The present invention relates to a cooling wall water pipe sealing device and a sealing method, wherein the cooling wall water pipe sealing device includes a sealing ring, a second sealing body and a first sealing body; the rear end of the first sealing body is seal-welded to the pipe mouth of the cooling wall water inlet pipe, and the front end outer wall of the first sealing body is provided with an external thread section; the second sealing body includes a second sealing cylinder coaxially arranged with the first sealing cylinder, and a connecting cylinder sleeved and fixed on the outside of the second sealing cylinder, the sealing ring is located between the first sealing cylinder and the second sealing cylinder, and the two end faces of the sealing ring are in sealing contact with the first sealing cylinder and the second sealing cylinder respectively. The present invention improves the adaptability to the waveform of the corrugated pipe by clamping the sealing ring in the trough of the corrugated pipe, thereby improving the fit between the corrugated pipe and the sealing ring and ensuring the sealing effect; the end of the second sealing cylinder is connected to the cooling water supply pipe, which greatly improves the convenience of connection and ensures that the cooling water flows into the water inlet end of the corrugated pipe through the inner hole of the second sealing cylinder.

The tuyere medium sleeve with the protection enhancing function comprises a cylindrical body, and the front end and the rear end of the body are used for being connected with a small tuyere sleeve and a large tuyere sleeve correspondingly to form a hollow sleeve body used for clamping an air supply channel; a cooling cavity is formed in the body wall of the body, and a side grouting opening penetrating through the body wall is formed in the thickness direction of the body wall. A grouting channel penetrating from the rear end to the front end is formed in the length direction of the body wall, a grouting outlet is formed towards the surface of the outer wall of the tuyere small sleeve, and the grouting channel can be repeatedly drilled and dredged so that slurry can flow through the grouting channel many times and can be repeatedly used. According to the tuyere medium sleeve, the grouting channel from the rear end to the front end is designed, so that the grouting material can form a protection layer on the outer wall of the tuyere small sleeve, the protection effect of the tuyere small sleeve is enhanced, and the wear resistance and erosion resistance are improved. The grouting channel can be dredged by drilling, multiple grouting operations are allowed, the maintainability of the structure is improved, and the service life is prolonged.

The invention relates to a microchannel single-cavity tuyere small sleeve and a blast furnace comprising the microchannel single-cavity tuyere small sleeve, the microchannel single-cavity tuyere small sleeve comprises a small sleeve body, the small sleeve body is provided with a heat exchange cavity and a cooling cavity located on the periphery of the heat exchange cavity, and the heat exchange cavity penetrates through the small sleeve body in the length direction; the cooling cavity comprises a first cavity body and a second cavity body which are distributed in the length direction. The partition plate is arranged in the second cavity and surrounds the heat exchange cavity so as to divide the second cavity into a third cavity and a fourth cavity surrounding the radial outer side of the third cavity, and the sides, away from the first cavity, of the third cavity and the fourth cavity communicate with each other; and the at least one first cooling liquid pipe is arranged in the first cavity, the first end of the first cooling liquid pipe communicates with one of the third cavity and the fourth cavity, and the second end of the first cooling liquid pipe penetrates out of the side wall, away from the second cavity, of the first cavity. The temperature of the micro-channel single-cavity tuyere small sleeve is reduced, and damage caused by too high temperature is avoided.

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

An embodiment of the present invention discloses an installation and construction method for blast furnace body cooling equipment, comprising the following steps: Step 1: When the blast furnace shell is installed to the lower part of the furnace body, a protective shed is installed at the maximum diameter position of the upper part of the furnace belly belt, and while the furnace shell continues to be installed above the furnace body, the four sections of cooling walls from the hearth to below the tuyere begin to be installed; Step 2: After the furnace shell is installed, all remaining cooling walls and throat steel bricks are installed. The cooling walls installed by the present invention are firmly installed, densely installed inside the furnace shell, can work continuously for a long time, work stably, can continuously cool the furnace shell of the blast furnace, and improve the service life of the blast furnace.

A method for the reduction of a metal oxide-containing material in which a reducing gas that is obtained using ammonia (NH3) is used. The reducing gas is supplied to a reduction reactor containing the metal oxide-containing material, and a top gas is discharged from the reduction reactor. At least one sub-quantity of the top gas is used as components in the preparation of the reducing gas, optionally after the top gas is prepared. A device for the reduction of the metal oxide-containing material that includes a reduction reactor, a top gas discharge line for discharging top gas, a supply line for an ammonia contribution, a preparation system for preparing the reducing gas, a supply line for the ammonia contribution leading into the preparation system, and a feed line for feeding the reducing gas and / or a precursor of the reducing gas to the reduction reactor.

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

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

This application discloses a device for treating blockages in cooling wall water pipes. The device includes: a first tee pipe having a fourth, fifth, and sixth pipe, wherein the fourth pipe is connected to the flow channel of the first pipe, the fifth pipe is connected to the flow channel of the third pipe, and the sixth pipe is located between the fourth and fifth pipes; a second tee pipe having a seventh, eighth, and ninth pipe, wherein the seventh pipe is connected to the sixth pipe, the ninth pipe is connected to the second pipe, and the ninth pipe is located between the seventh and eighth pipes; a first shut-off valve located on the eighth pipe for controlling the on / off state of the eighth pipe; and a second shut-off valve located on the ninth pipe for controlling the on / off state of the ninth pipe.

The utility model discloses a fully utilized inner hole structure of a blast-furnace tuyere small sleeve, relates to the technical field of blast-furnace tuyere small sleeves, and aims to solve the problems that the existing blast-furnace tuyere small sleeve is harsh in working environment, is easy to damage under the conditions of tuyere blockage, non-uniform airflow distribution at the upper part of a blast furnace or airflow fluctuation, and is not easy to damage. Meanwhile, molten iron makes direct contact with the copper wall of a small sleeve, heat flow drastically increases within an extremely short time, small sleeve melting loss can be caused, meanwhile, a necking lining is installed in the small sleeve, the size of the lining is not appropriate, the lining cannot be flush with the front section of the small sleeve, airflow entering a furnace is disordered, blast furnace inlet airflow is disordered, and the furnace condition is worsened. According to the technical scheme, the small sleeve is characterized by comprising a small sleeve body, a small sleeve air channel is formed in the center of the interior of the small sleeve body, a front air opening is reserved in the other end, located on the outer side of the small sleeve air channel, of the interior of the small sleeve body, and a surfacing layer is arranged on the outer side of the small sleeve body. And the effects of stable work, cost reduction and efficiency improvement are achieved.

A blast furnace control method according to the present invention involves: estimating a temperature distribution in a blast furnace by executing heat transfer analysis using a numerical model of a blast furnace including a solidified layer of pig iron remaining on a furnace bottom and a furnace body iron shell,; estimating a stress distribution in the blast furnace by executing stress analysis using the numerical model of the blast furnace and the estimated temperature distribution; determining an allowable range of the furnace wall temperature of the blast furnace such that the thermal stress applied to the furnace body iron shell is within an allowable range on the basis of the estimated stress distribution; and controlling the cooling capacity of the furnace wall of the blast furnace such that the furnace wall temperature of the blast furnace is within the determined allowable range.

The invention belongs to the technical field of cooling equipment, and discloses a blast furnace rapid cooling structure which is technically characterized by comprising a furnace shell, a water cooling wall is fixedly mounted on the inner side of the furnace shell, a cooling pipe is arranged in the water cooling wall, cooling plates are fixedly mounted at different heights of the surface of the furnace shell, and cooling cavities are formed in the cooling plates; a bearing seat is slidably mounted in the cooling cavity in the vertical direction, a heat dissipation net plate is fixedly mounted on the surface of the bearing seat, ventilation holes are formed in the surface of the cooling plate, a positioning assembly is arranged on the surface of the furnace shell, and a heat dissipation mechanism matched with the ventilation holes is arranged on the surface of the cooling plate. The heat dissipation mechanism comprises a sealing assembly and a ventilation assembly, the ventilation assembly and the sealing assembly are arranged to be matched with each other, the opening and closing states of the ventilation holes can be automatically switched, then evaporation of water attached to the surface of the cooling cavity can be accelerated, and the heat dissipation and cooling speed of the cooling plate and the water cooling wall is further increased.

The utility model discloses a cooling wall assembly for a blast furnace bosh, and relates to the technical field of chemistry. A cooling wall assembly for a blast furnace bosh comprises a cooling wall, a limiting device is arranged on the cooling wall and comprises a sliding seat, a hanging ring and a limiting block, a limiting block groove is formed in the outer wall of one side of the cooling wall, the outer wall of the rear end of the sliding seat is slidably connected with the interior of the limiting block groove, and the outer wall of the limiting block is slidably connected with the interior of the limiting block groove. Two fixing bolt grooves are formed in the outer wall of the end, close to the sliding base, of the cooling wall, fixing bolts in the limiting devices are screwed to rotate so that the other ends of the fixing bolts can be disengaged from the interiors of the fixing bolt grooves, then limiting blocks are pulled to be taken down, the hanging rings and the sliding base can be taken down from the cooling wall by pulling the hanging rings, and therefore the hanging rings are convenient to disassemble; and the dismounting efficiency of the lifting ring is effectively improved, and meanwhile, the dismounting difficulty is reduced, so that the working efficiency of workers is improved while the workload of the workers is reduced.

The invention relates to the technical field of replacement of iron-making blast furnace shells in the metallurgical industry, and provides a construction method for replacing a furnace shell at a hearth part of a large iron-making blast furnace, which comprises the following steps: S1, preparing a hearth state; s2, temperature control; s3, load calculation; s4, mounting a supporting column; s5, ring beam design; s6, cutting and separating the old furnace shell; s7, settlement detection and dismantling condition confirmation; s8, mounting and welding a new furnace shell; s9, a temporary support dismantling sequence is determined; a stable bottom bearing base is formed by retaining a dead iron layer or a slag iron shell to directly bear the vertical load of a hearth lining and residual materials, only the steel pipe supporting columns need to be fixedly arranged on the furnace bottom plate at intervals, and the total steel consumption is reduced; and the local load is converted into the internal force of the whole frame through accurate positioning of the column tops, steel pipe diagonal bracing between the columns, formation of a space rigid frame system and conversion of the local load into the internal force of the whole frame, the column bottoms and the furnace bottom plate only need to be fully welded, stiffening ribs are arranged, the welding workload is reduced, and the problem of residual stress concentration of the frame is avoided.

The invention discloses a heat preservation method, device and equipment for a hearth after furnace shutdown and a medium, and belongs to the technical field of metallurgy. The method comprises the following steps: after the blast furnace is shut down, obtaining the thermal load and the carbon brick temperature of a hearth, and spraying a preset mass of a heat preservation agent into the hearth; according to the thermal load and the carbon brick temperature, the minimum cooling water amount of the cooling wall is determined, cooling water with the minimum cooling water amount is input into the cooling wall, and the minimum cooling water amount is smaller than the cooling water amount input into the cooling wall when the blast furnace is opened. According to the method, a heat preservation agent is adopted for conducting physical heat insulation on the hearth, heat loss caused by air flow to the hearth is reduced, meanwhile, under the condition that carbon bricks of the hearth are protected, the cooling water amount of a cooling wall is lowered as much as possible, heat of slag taken away by cooling water is reduced, and the heat loss of the hearth is reduced in two modes; the amount of coke additionally supplemented due to heat loss of the hearth during next blow-in of the blast furnace is reduced, and slag iron stored in the hearth can be conveniently discharged after blow-in, so that the blast furnace is quickly recovered.

A cooling method for super-large blast furnaces during maintenance shutdowns involves intermittently spraying water from cross-shaped temperature measuring holes and tuyere water guns inserted into the tuyere outlets after the furnace is shut down. The water spraying method is monitored and controlled in stages to effectively cool the remaining coke surface in the hearth. Throughout the process, the water volume is rationally controlled based on a series of collected parameters, including gas temperature, gas concentration, and coke surface temperature. The installed water guns and tuyere water guns have atomizing spraying functions, working in conjunction with pre-set top water guns to spray water onto the coke surface in the center of the hearth for cooling. This invention implements intermittent water spraying cooling by collecting multiple parameters. This invention not only achieves coke cooling, creating safe working conditions for furnace construction, but also avoids damage to the carbon bricks caused by excessive water contact with the cooling water. Furthermore, it creates favorable conditions for cleaning broken coke from the hearth before furnace restart.

The invention belongs to the technical field of blast furnace cooling, and particularly relates to a cooling water supply system of a blast furnace air supply device and a cooling method. One end of a hot water recovery pool is connected with a filter pump through a pipeline, the filter pump is connected with a fiber ball filter, and the fiber ball filter is connected with the hot water recovery pool through a pipeline; the other end of the hot water recycling pool is connected with a lifting pump through a pipeline, the lifting pump is connected with a cooling tower through a pipeline, the cooling tower is connected with a cooling water pool, and one end of the cooling water pool is connected with a high-pressure water pump. The pipeline filters are connected with a tuyere small sleeve of an air supply device, the tuyere small sleeve of the air supply device is connected with a hot water recovery pool through a pipeline, and an accident emergency water supply mechanism is additionally arranged at the water inlet end of the tuyere small sleeve of the air supply device. According to the system, cooling water is provided by the accident emergency water supply mechanism during double-path high-voltage power loss and diesel engine pump idling time, and the tuyere small sleeve is prevented from being burnt out and exploded through continuous water supply.

The utility model belongs to the technical field of blast furnace cooling devices, and relates to a novel cooling system on-line monitoring device which comprises a tuyere sleeve, a water inlet pipe and a water outlet pipe are respectively connected onto the tuyere sleeve, connecting flanges are arranged at the tail ends of the water inlet pipe and the water outlet pipe, and turbine flowmeters are arranged in the water inlet pipe and the water outlet pipe. A temperature display screen is arranged on the side wall of the tuyere sleeve and comprises a temperature sensing probe, one end of the temperature sensing probe is inserted into the tuyere sleeve, a bearing is arranged at the other end of the temperature sensing probe and connected with a rotary connecting block, the rotary connecting block is connected with a fixed connecting block, and a liquid crystal screen is arranged on the fixed connecting block. The blast furnace tuyere sleeve cooling efficiency monitoring device has the dual functions of monitoring the cooling water flow and the tuyere temperature in real time, accurately detects the flow speed of a pipeline through the built-in turbine flowmeter, and realizes dynamic visual monitoring of the cooling efficiency of key parts of the blast furnace tuyere sleeve in cooperation with the rotatable digital display screen.