534results about "Tuyeres" patented technology

To provide a tuyere of a blast furnace and a blast furnace operation method using the tuyere, the tuyere being equipped with a pulverized coal blowing lance and a hydrogen-based reducing gas blowing lance, in which adhesion of pulverized coal to the inner surface of the tuyere is further suppressed and blockage can be prevented.SOLUTION: A tuyere of the blast furnace comprises a pulverized coal blowing lance for blowing pulverized coal into the tuyere and a hydrogen-based reducing gas blowing lance for blowing a hydrogen-based reducing gas into the tuyere. The tip of the pulverized coal blowing lance is located at a position 50 mm-100 mm from the tip of the tuyere, the tip of the hydrogen-based reducing gas blowing lance is located at a position 60 mm-120 mm from the tip of the tuyere, and the tip of the pulverized coal blowing lance is located further inside the furnace of the blast furnace than the tip of the hydrogen-based reducing gas blowing lance.SELECTED DRAWING: Figure 1

The invention relates to the technical field of blast furnace smelting, and discloses a method, device and equipment for determining the position of a blast furnace soft melting zone and a storage medium, and the method comprises the following steps: carrying out charge level scanning based on a material distribution starting signal and a material distribution ending signal of current material distribution to obtain a charge level coordinate and a charge discharging speed; determining a first boundary condition based on the furnace charge level coordinates and the blast furnace characteristics, and constructing an initial grid structure; the initial grid structure is updated based on the furnace charge level coordinates and the furnace charge discharging speed, and a target grid structure is obtained; enabling the blast furnace burden to react, obtaining the distribution condition of each grid unit in the target grid structure under the condition that a plurality of burden performance parameters of each grid node in the target grid structure converge, and generating a temperature field distribution diagram; and determining the position of the soft melting zone of the blast furnace based on the plurality of furnace charge performance parameters and the temperature field distribution diagram corresponding to each grid node in the target grid structure. According to the method, the accuracy of determining the position of the soft melting zone is improved, and dynamic changes in the blast furnace are reflected.

The invention relates to the technical field of blast-furnace tuyere mud removing equipment, and particularly discloses blast-furnace tuyere sleeve mud poking equipment which comprises a rack, power wheels are arranged at the four corners of the bottom of the rack, a bracket is arranged above the rack, and an impactor is movably arranged at one end of the bracket; the impacter is driven by a thrust cylinder arranged on the bracket to move, one end of the impacter is connected with a drill rod, and the other end of the impacter is communicated with an air inlet pipe. The rack is remotely controlled to move to the right front of a blast-furnace tuyere, the tail end of a drill rod which is arranged in the blast-furnace tuyere in advance is inserted into a punching and drilling connector at one end of the impactor, the thrust air cylinder is controlled to drive the piston shaft to push the guide device to move, supporting force is provided for propelling of the impactor and the drill rod, and meanwhile high-pressure gas is introduced into the impactor through the gas inlet pipe; and the drill rod reciprocates at a high speed to impact blocking mud in the tuyere of the blast furnace, so that the blocking mud is quickly broken through, the working efficiency is improved, and safety accidents possibly caused by manual operation are avoided.

The present invention discloses a method for injecting biomass fuel into a blast furnace, wherein the mixed fuel obtained by replacing part of the fossil fuel with biomass shaped fuel that has not been carbonized at high temperature is injected into the blast furnace from the tuyere of the blast furnace through an injection device to complete combustion and smelting reactions. The method of the present invention can reduce the use of fossil fuels, reduce carbon emissions and SO2 pollution without affecting smelting indicators. The implementation process does not require the introduction of carbonization equipment, eliminates the grinding and powder transportation process of pipeline fuel transportation, explosion-proof safety, and environmental protection links, saves a lot of investment and operating costs, has high safety and reliability, high economic utilization value, and can achieve economic and green smelting.

The invention relates to an ironmaking system and method for coupling solid oxide electrolysis and blast furnace waste heat utilization, the system comprises a solid oxide electrolysis system, a hot air system, a heat exchange network and a blast furnace body, the solid oxide electrolysis system generates hydrogen and oxygen through electrolyzed water under coupling driving of an external power supply and blast furnace waste heat; the hot air system is used for continuously conveying high-temperature hot air to a blast furnace by taking blast furnace gas as fuel; according to the heat exchange system, waste heat generated by a blast furnace is used for heating fuel at an inlet of a solid oxide electrolytic tank and hydrogen at an inlet of the blast furnace; the blast furnace body is used for reducing ore to smelt pig iron. Waste heat in the blast furnace ironmaking process is recycled through the heat exchange network, inlet water of a solid oxide electrolysis system and blast furnace inlet hydrogen are heated, power consumption in the electrolytic hydrogen production process is effectively reduced, and meanwhile the device has important significance on deep energy conservation and carbon reduction of the blast furnace hydrogen-rich metallurgy technology.

The invention relates to a tuyere small sleeve and a blast furnace. The tuyere small sleeve comprises a sleeve main body which comprises an inner sleeve and an outer sleeve, and an annular mounting cavity is defined by the inner sleeve and the outer sleeve; the multiple partition plates are arranged at the front end of the mounting cavity at intervals around the peripheral side of the inner sleeve, all the partition plates extend in the radial direction, cooling channels are defined by the adjacent partition plates, the outer wall of the inner sleeve and the inner wall of the outer sleeve, and all the cooling channels communicate with the mounting cavity; the baffles are arranged between the inner sleeve and the outer sleeve in a sleeving mode and connected with the partition plates, the baffles divide the cooling channels into first flow channels, connecting flow channels and second flow channels which communicate with one another, and cooling liquid flows into the second flow channels from the first flow channels through the connecting flow channels. The partition plates can support the inner sleeve and the outer sleeve in the installation cavity, the structural strength is improved, meanwhile, cooling liquid can make contact with the partition plates, the outer wall of the inner sleeve and the inner wall of the outer sleeve in the cooling channel, the heat exchange effect is improved, abrasion and melting loss of the tuyere small sleeve caused by high temperature are reduced as much as possible, and the service life of the tuyere small sleeve is prolonged.

The invention relates to a tuyere small sleeve and a blast furnace. The tuyere small sleeve comprises an inner sleeve and an outer sleeve, wherein the inner sleeve is provided with an air supply hole penetrating in the axial direction; the outer sleeve is arranged on the inner sleeve in a sleeving mode, the two axial ends of the outer sleeve and the inner sleeve are connected in a sealed mode, an annular installation cavity is defined by the inner sleeve and the outer sleeve, and the installation cavity is arranged on the outer side of the air supply hole in a sleeving mode; the reinforcing columns are arranged in the mounting cavity in the radial direction, a gap exists between every two adjacent reinforcing columns, and the two ends of each reinforcing column are connected with the outer wall of the inner sleeve and the inner wall of the outer sleeve respectively. Thus, the reinforcing columns can support the inner sleeve and the outer sleeve, the structural strength of the tuyere small sleeve is improved, the reinforcing columns can make contact with cooling liquid, the contact area of the tuyere small sleeve and the cooling liquid is increased, and therefore the heat exchange area is increased, abrasion and melting loss of the tuyere small sleeve caused by high temperature are reduced as much as possible, and the service life of the tuyere small sleeve is prolonged. Moreover, the tuyere small sleeve is simple in structure, convenient to form, low in cost and convenient for low-cost batch production.

The invention belongs to the technical field of blast furnace ironmaking, and particularly discloses a tuyere device for blowing coal gas, oxygen and pulverized coal, which comprises a tuyere body and a coal gas blowing pipe, a central channel is arranged in the tuyere body, an oxygen channel and an oxygen loop are arranged in the tuyere body, the oxygen channel is communicated with the oxygen loop, the oxygen loop is communicated with an annular through groove, and the annular through groove is communicated with the coal gas blowing pipe. An annular through groove is formed in the tuyere body, the annular through groove is communicated with the central channel, the tuyere body is provided with a concave spherical surface used for being in spherical fit with a coal gas blowing pipe, a coal powder gun used for spraying coal powder is inserted into the coal gas blowing pipe, and the coal powder spraying end of the coal powder gun extends to the position 20-50 mm in front of the annular through groove at the angle of 10-15 degrees. The problems that when a traditional tuyere device carries out injection operation, oxygen is not evenly distributed in a channel, so that the ironmaking efficiency is low, and a tuyere is damaged are solved. According to the invention, by arranging the oxygen annular channel and the annular through groove, oxygen can be uniformly distributed in a central channel in the tuyere, and is subjected to violent premixing and combustion reaction with high-temperature coal gas and pulverized coal before entering a blast furnace, so that high-efficiency production is realized.

The invention discloses a layered, zoned and differentiated CO2 injection system and method for a blast furnace, and belongs to the technical field of ferrous metallurgy low carbon. The system comprises a CO2 supply and distribution system, a tuyere area injection module, a furnace body middle-lower part injection module and a furnace body upper part injection module. And according to the temperature gradient and atmosphere layering characteristics in the blast furnace, a differential CO2 distribution proportion and a collaborative thermal compensation strategy are adopted. An oxygen-CH4 synergistic injection device is arranged in a tuyere area, and rapid conversion of CO2 is promoted by using a high-temperature strong reducing atmosphere; a biomass charcoal synergistic injection device and an angle-adjustable nozzle are arranged at the middle lower part of the furnace body, so that efficient gasification reaction is realized; and low-concentration CO2 mixed injection is adopted at the upper part of the furnace body, so that indirect reduction reaction is promoted. According to the invention, the CO2 conversion rate is 65-80%, the coke ratio is reduced by 15-25%, the consumption of CO2 per ton of iron is 260-90Nm < 3 >, the carbon emission is obviously reduced, and the ironmaking efficiency is improved.

The invention provides a blast furnace tuyere air volume distribution method and device, electronic equipment and a storage medium. The method comprises the steps that blast furnace operation data are obtained, any tuyere serves as a first tuyere, the initial air volume is obtained based on the total operation air volume and the tuyere number, and the initial air volume serves as the tuyere air volume of the first tuyere; obtaining a header pipe inlet pressure of the first tuyere according to the tuyere air volume of the first tuyere, the tuyere rotation area back pressure of the first tuyere and a preset mapping relation; taking the initial air volume as the air volume of the other air ports, traversing and calculating the main pipe inlet pressure of the other air ports, and adjusting the air volume of the other air ports based on the main pipe inlet pressure of the other air ports and the main pipe inlet pressure of the first air port, so that the difference between the main pipe inlet pressure of the other air ports and the main pipe inlet pressure of the first air port is smaller than a preset pressure threshold value; and the adjusted tuyere air volume of each other tuyere is used as the distribution air volume of each other tuyere, so that the technical problem of low calculation precision of tuyere air volume distribution at present is solved.

The blast furnace tuyere plugging process comprises the following steps: firstly, preparing mixed stemming by mixing water stemming with dry pulverized coal; twisting the mixed stemming into a cylinder; and finally, the stemming is fed into a tuyere small sleeve of the blast furnace and tightly pressed, and tuyere plugging is completed. The mixed stemming is prepared by mixing the following components in parts by mass: 5-10 parts of water stemming and 0.1 part of dry pulverized coal. The mixed stemming prepared by mixing dry pulverized coal is adopted, and the pulverized coal can absorb moisture in the stemming, so that the stemming is firmer, the blocked tuyere is not easy to blow open in a short time, and the purpose of recovering the furnace condition after the tuyere is blocked is achieved; after reblowing, oxygen in blast can burn and gasify pulverized coal, the pulverized coal can be automatically blown open after the tuyere is blocked for about 3-5 hours, and potential safety hazards caused by tuyere poking are avoided.

The utility model provides a blast air supplement system of a blast furnace. The blast air supplement system comprises a blast furnace blower; the blast furnace blower supplies air to the blast furnace hot blast stove through an air blowing pipeline, and the blast furnace hot blast stove supplies hot air to the blast furnace; the side face of the air blowing pipeline is connected with an air supplementing pipeline, one end of the air supplementing pipeline is communicated with the air blowing pipeline, and the other end of the air supplementing pipeline is communicated with a standby air source. The standby air source is a standby air blower or a compressed air storage tank. A check valve, a flow meter, a flow regulating valve and a stop valve are arranged on the air supplementing pipeline, and the check valve prevents gas in the air supplementing pipeline from flowing back towards the standby air source. According to the blast furnace blast air supplementing system, air is supplemented for the blast furnace hot blast stove through the air supplementing pipeline, the air supplementing pipeline is connected with the standby air source, the purpose of supplementing air for the blast furnace hot blast stove can be achieved, redundant air sources in a factory can be fully utilized, and the blast furnace blast air supplementing system is environmentally friendly, saves cost, and is simple in structure and easy to operate.

The utility model relates to the technical field of metal printer wind fields, and particularly discloses an air inlet wind direction adjusting structure and a double-blowing wind field, comprising: an air guide component comprising an air frame, an air guide plate I arranged in the air frame, and an air guide plate II arranged below the air guide plate I in the air frame, longitudinal strip plates penetrating through the first air guide plate and the second air guide plate are vertically fixed into the air frame at equal intervals, and strip-shaped grooves are formed in the positions, corresponding to the longitudinal strip plates, of the surfaces of the second air guide plate and the longitudinal strip plates. The angle of the first air deflector and the angle of the second air deflector are synchronously adjusted through the adjusting assembly, controllability of the air direction is achieved, and the requirements of different air directions are met; the blocking assembly can block other spaces in the air frame, so that air can only be exhausted from the space between the first air guide plate and the second air guide plate, scattering of the air is reduced, the flow speed of the air is increased, and the pointing accuracy of the air is improved. And the upper and lower independent wind field structures increase the air flow in the chamber, so that the metal dust can be better brought out.

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.

An injection regulation and control device includes blast furnace tuyeres for introducing rich oxygen or pure oxygen to form tuyere raceways. Temperature-adjusting injection openings are evenly formed in the circumferential direction of a blast furnace and inject a hydrocarbon component-containing injection object to the blast furnace. The temperature-adjusting injection openings are located, in an axial direction, within a height range where a soft melting dripping zone is located and are not lower than the positions of the blast furnace tuyeres. The hydrocarbon component-containing injection objects are enabled to undergo a thermal cracking reaction by utilizing the temperature in the vicinity of the tuyere raceways to form a hydrocarbon thermal cracking heat absorption area. Gas products generated by the thermal cracking reaction of the hydrocarbon component-containing injection objects increase the blast furnace gas volume. Redundant heat in a lower high-temperature area is carried to the upper part of the blast furnace.

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 double-peak countercurrent double-cavity tuyere comprises a tuyere small sleeve body, a first front cavity water chamber is formed in the right end of the tuyere small sleeve body, and a second front cavity water chamber is formed in the position, located on the outer side of the first front cavity water chamber, of the right end of the tuyere small sleeve body. Through the arrangement of the flow guide partition plate, the interior of the flow guide box can be divided into two groups of different water chambers, the time required for cooling water to flow through the interior of the flow guide box is effectively prolonged, meanwhile, through the arrangement of the flow guide partition plate, the multiple groups of communicated water chambers are formed between the flow guide box and the tuyere small sleeve body due to the spiral shape of the flow guide partition plate, and the cooling effect is improved. And cooling water flowing through the first flow guide holes in the flow guide box can be effectively and spirally guided, the time for cooling the tuyere small sleeve body in the flowing process of the cooling water is further prolonged, and therefore the cooling effect on the tuyere small sleeve body is greatly improved.

The present disclosure discloses method for ironmaking in blast furnace with hydrogen enriched and carbon recycling, including increasing a proportion of oxygen blown through tuyeres to an ultra-high level of 35% to 50% with an oxygen enrichment in a traditional blast furnace as a reference; removing CO2 from top gas by using an amine scrubbing method, and then injecting it into the blast furnace with hydrogen enriched and carbon recycling; a distance between the inlet of gas for heating furnace body and the gas injection ports of the composite tuyere device is L1, and a distance between the inlet of gas for heating furnace body and the top of furnace is L2, where L1: L2 is 6.5: 8.2, an angle between the inlet of gas for heating furnace body and a lower part of outer wall of the furnace body is β, where β is in a range of 112° to 130°, the temperature of the high-temperature upgraded gas entering the blast furnace is 950°C when entering from the furnace body and 1200°C when entering through the tuyeres, using sintered ore with a basicity R = 1.75 ± 0.05, and checking charges according to a requirement for slag to contain more than 15% Al2O3 and to have a binary basicity B2 = CaO / SiO2 = 1.02-1.10; doping decarbonized gas from the Oxyfurnace and coke oven gas into the recycling gas pipeline at the inlets of the composite tuyere device, with a combined amount thereof is 12% to 25% of the total amount of high-temperature upgraded gas introduced into the blast furnace with hydrogen enriched and carbon recycling.

The utility model relates to the field of metal smelting, and discloses a tuyere plugging tool which comprises a push rod and a plugging rake (1) fixedly connected to the top end of the push rod. The face, opposite to the push rod, of the blocking rake (1) is a plane, the blocking rake (1) is round, and the center of the round blocking rake (1) is located on the axis of the push rod. The push rod is formed by connecting a plurality of connecting rods (2) end to end. The tuyere plugging tool can quickly and reliably seal a tuyere, and can adapt to operation in a narrow space.

The utility model relates to the technical field of blast furnace tuyere small sleeve leakage detection, and particularly discloses a blast furnace tuyere small sleeve leakage detection device which comprises a tuyere small sleeve body, a small sleeve water inlet pipe, a small sleeve water outlet pipe, a glass round pipe, a front end cover, a rear end cover, a front nipple, a rear nipple and a laser. The front end cover and the rear end cover are locked through a plurality of sets of stay bolts, a front connector and a rear connector are formed on the opposite sides of the front end cover and the rear end cover respectively, the front connector is connected with a small sleeve water outlet pipe in the water incoming direction through a front nipple, and the rear connector is connected with a small sleeve water outlet pipe in the water removing direction through a rear nipple. And the laser is used for emitting laser into the glass circular tube along the radial direction of the glass circular tube. The air outlet small sleeve leakage detection device can quickly and visually detect whether the air outlet small sleeve body leaks or not.

A blast furnace blower device includes a body, a flow guidance structure and a cooling module. The body is hollow inside. The body includes an inlet area, an outlet nozzle area, and a fuel nozzle area. The fuel nozzle area is located between the outlet nozzle area and the inlet area, and a channel is formed from the inlet area to the outlet nozzle area. The flow guidance structure is deployed continuously or discontinuously along an inner wall of the body. The flow guidance structure is located between the fuel nozzle area and the outlet nozzle area. The flow guidance structure has a nozzle distance range along an axial direction of the body to the outlet nozzle area. The cooling module is located outside the body.

The invention discloses a blast-furnace tuyere coal quantity balance intelligent regulation and control method, and the opening degree of a gas-solid two-phase flow regulating valve is precisely regulated and controlled according to preset conditions by obtaining the current pulverized coal concentration value, the coal injection quantity and the pressure difference value in a coal injection pipeline in real time. When the coal injection amount deviates from the preset range, the opening degree is reasonably increased or decreased, it is ensured that the coal injection amount of each coal injection pipeline is relatively balanced, and the coal amount uniformity is effectively improved. And when the current pulverized coal concentration value is not in the preset interval and the pressure difference value is larger than the preset value, the nitrogen control valve is started. During operation, the opening degree of the nitrogen control valve is accurately adjusted in three time periods, and the nitrogen flushing force is gradually increased in cooperation with operation of the gas-solid two-phase flow adjusting valve. Meanwhile, the coal injection control valve is closed when the nitrogen control valve is started, mutual interference between coal injection and nitrogen flushing is avoided, the flushing effect of nitrogen on the coal injection pipeline is greatly improved, the pipeline is guaranteed to be unblocked, the blocking risk is reduced, and the stability and operation efficiency of the blast furnace coal injection system are improved.

The invention belongs to the technical field of blast furnace smelting, and particularly discloses a hydrogen-rich carbon circulating oxygen blast furnace blow-in air supply system and method.The system comprises a blast furnace, an air inlet header pipe, a smoke header pipe and a plurality of hot blast stoves, each hot blast stove communicates with a nitrogen inlet pipe and a cold air inlet pipe, and each hot blast stove is provided with an air outlet pipe; each air outlet pipe is communicated with an air outlet header pipe, the air outlet header pipe is communicated with a communicating bustle pipe, the high way is communicated with a plurality of air inlet branch pipes, the bustle pipe is communicated with the air inlet branch pipes, the air outlet header pipe is communicated with an air mixing pipe, the bottom of each hot blast stove is communicated with a smoke exhaust pipe, and each smoke exhaust pipe is communicated with a smoke header pipe. The flue gas header pipe is communicated with a flue gas branch pipe I, the flue gas branch pipe I is communicated with the blast furnace, the flue gas branch pipe I is communicated with a flue gas branch pipe II, the upper end of each hot blast stove is communicated with a flue gas inlet pipe, each flue gas inlet pipe is communicated with the flue gas branch pipe II, and the flue gas branch pipe I is provided with a circulating fan. Efficient temperature control and oxygen reduction are achieved, waste heat recycling is achieved, and safe, energy-saving and low-carbon blow-in is achieved.

The utility model discloses blast furnace burden proportioning equipment with an optimized air supply convolution structure, which comprises a blast furnace body, the top of the blast furnace body is provided with a charging port, the inner bottom of the blast furnace body is provided with a hearth bottom, one side of the hearth bottom is provided with a blast nozzle, an air inlet pipe is fixedly mounted in the blast nozzle, and the blast nozzle is provided with a blast hole. An air supply pipe is installed in the air inlet pipe, a butt flange sealing gasket is installed at the right end of the air supply pipe, a right side flange of the butt flange sealing gasket is connected with a conical pipe, the right end of the conical pipe is connected with a necking pipe, and the right end of the necking pipe is connected with an air outlet. The diameter of the air supply pipe is smaller than that of the air inlet pipe, the diameter of the air inlet pipe is smaller than that of the blower nozzle, and the closer to the blower nozzle, the larger the diameter is, so that the air inlet area is increased accordingly, and the range and the length of the air port rotation area are enlarged by increasing the air inlet area. And the range of the rotary motion formed in the tuyere rotary area is larger.

A tuyere apparatus according to the present invention comprises: an outer circulation hole disposed on the outermost peripheral side inside a tuyere; and an inner circulation hole disposed on the inner peripheral side of the outer circulation hole. The inner circulation hole has two or more independent flow paths, the two or more independent flow paths being separated from the inner surface of the tuyere. A blast furnace operation method according to the present invention comprises, using the above-described blast furnace tuyere apparatus in a blast furnace: blowing a low oxygen concentration gas, a high oxygen concentration gas having an oxygen concentration higher than that of the low oxygen concentration gas, and a reduction material from the tuyere; blowing the low concentration oxygen gas from the outer circulation hole; blowing the high oxygen concentration gas and the reduction material from the inner circulation hole; and blowing the high oxygen concentration gas and the reduction material separately from the two or more independent flow paths.

An air leakage adjusting device suitable for blast furnace belly pipes comprises a plurality of adjusting parts, the number of the adjusting parts is the same as that of the belly pipes, and all the adjusting parts are arranged under the belly pipes corresponding to the adjusting parts in position. The adjusting part is arranged on a blast furnace platform; the adjusting part comprises an impact mechanism and an adjusting mechanism; the adjusting mechanism comprises a supporting piece, a guiding piece and an adjusting piece. The supporting piece is arranged on a blast furnace platform; the guiding piece is arranged on the supporting piece, and the adjusting piece is arranged on the guiding piece. According to the utility model, the air leakage condition of the belly pipe can be found at the first time, and the belly pipe can be adjusted at the first time to reset.

The application provides a method for treating blast furnace tuyere coal gas leakage, comprising the following steps: taking the outside of the gap between a large tuyere sleeve and a second tuyere sleeve of a blast furnace tuyere as a polishing surface; polishing the polishing surface to form a rough surface and removing impurities on the rough surface; brushing several layers of epoxy resin on the rough surface, brushing the next layer of epoxy resin after the solidification of each layer of epoxy resin, and forming an adhesion layer after the solidification of each layer of epoxy resin. Compared with the prior art, the method in the scheme polishes and applies glue at the gap between the outside of the large tuyere sleeve and the second tuyere sleeve, forms multiple adhesion layers, blocks the gap, and prevents coal gas leakage.

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 utility model discloses an oven guide pipe device used in a blast furnace. The device is characterized in that a hot air ring pipe is horizontally arranged in the furnace and arranged between an air inlet and an iron notch, the top of the hot air ring pipe is connected with the air inlet through hot air input pipes, the hot air input pipes correspond to the air inlets one to one, a plurality of groups of flow guide pipes are arranged on the hot air ring pipe, and the inner diameter of each flow guide pipe is 0.1-0.3 of that of the hot air ring pipe; the flow guide pipe is connected with the side surface of the hot air ring pipe, a flow guide outlet of the flow guide pipe is arranged downwards, is aligned to the inner bottom of the furnace body, is close to the furnace body but is not contacted with the furnace body, the flow guide pipe is divided into an inner ring flow guide pipe and an outer ring flow guide pipe, the flow guide outlet of the inner ring flow guide pipe is arranged on the inner ring of the hot air ring pipe, and the flow guide outlet of the outer ring flow guide pipe is arranged on the outer ring of the hot air ring pipe; iron notch ventilation pipes extending outwards are arranged on the side faces of part of the outer ring flow guide pipes, and the iron notch ventilation pipes are aligned with the iron notches and correspond to the iron notches in a one-to-one mode. The utility model can improve the uniformity of the furnace baking effect and ensure the quality of the blast furnace.

The invention provides a blast-furnace tuyere accident water circulation cooling recovery device and a blast-furnace tuyere accident water circulation cooling recovery method. The blast furnace tuyere accident water circulation cooling recovery device comprises a first-stage sedimentation water tank, a second-stage sedimentation water tank and a third-stage sedimentation water tank, at least two water outlets are formed in the first-stage sedimentation water tank in the height direction, and all the water outlets of the first-stage sedimentation water tank are communicated with a main water inlet pipeline in the second-stage sedimentation water tank through branch pipelines; a pressurizing spray head is arranged on a water outlet of the main water inlet pipeline in the secondary sedimentation water tank, an impeller is arranged in the secondary sedimentation water tank and is positioned below the pressurizing spray head, and a precipitant spray head is arranged above the secondary sedimentation water tank; and drain outlets are formed in the bottoms of the first-stage sedimentation water tank, the second-stage sedimentation water tank and the third-stage sedimentation water tank. According to the blast-furnace tuyere accident water circulation cooling recovery device, rapid purification and self-recovery of accident water which is large in flow fluctuation and contains impurities are achieved, and the purposes of saving energy and recycling waste water are achieved.