432results about "Tuyeres" patented technology

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 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 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.

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 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.

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 utility model provides a device for preventing a blast furnace tuyere blowpipe from sinking. The device for preventing the blast furnace tuyere blowpipe from sinking comprises a tuyere large sleeve, a tuyere medium sleeve, a tuyere small sleeve, a supporting boss, a mounting plate and a moving assembly, the tuyere medium sleeve is arranged at the rear end of the tuyere large sleeve, the tuyere small sleeve is arranged at the rear end of the tuyere medium sleeve, the supporting boss is arranged in the tuyere small sleeve, and the mounting plate is arranged in the tuyere small sleeve. The outer diameter of the supporting boss is matched with the inner diameter of the small tuyere sleeve, and the inner diameter of the supporting boss is matched with the outer diameter of a tuyere blowpipe. According to the device for preventing the blast furnace tuyere blowpipe from sinking, the tuyere blowpipe is not easy to sink when the blast furnace is in damping down due to the arrangement of each structure, so that the maintenance and repair period of workers on the blast furnace is prolonged, and the cost of the workers is reduced.

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.

The present invention relates to a tuyere blowing device and a method for designing a tuyere blowing system to prevent backfire, and belongs to the technical field of blast furnace blowing. The tuyere blowing device includes a gun body and a gun head, and the gun body and the gun head are connected as a whole by welding. The method includes obtaining the composition of the blowing gas, calculating the critical backfire speed of the blowing gas, obtaining the blowing amount of the blowing gas, selecting the number of tuyere blowing, and calculating the blowing speed of the blowing gas. The present invention changes the structure of the tuyere blowing device so that the blowing gas can increase the blowing speed; through the correct matching of the blowing gas with the blowing amount and the blowing speed, the blowing gas can be evenly and stably blown, and the backfire of the blowing gas and the burning of the blowing device can be prevented, thereby extending the life of the blowing device, making the blast furnace stable and smooth, achieving carbon reduction and consumption reduction of the blast furnace, and achieving the expected goal of the gas injection.

The operation method of a blast furnace improves the ventilation of the lower part of the blast furnace by tuyere injection of fine ore. The operation method of the blast furnace (1) of the invention is characterized in that coal is pulverized as fine coal, and an iron ore having a pulverized ignition loss of 9 mass% or more and 12 mass% or less is pulverized as fine ore, the injection rate of the fine coal is 150 kg / tp or more, the injection rate of the fine ore is 2.5 kg / tp or more and 50.0 kg / tp or less, and the fine coal and the fine ore are injected from the tuyere (2). It is preferable that the iron ore and the coal are pulverized together.

The invention relates to the technical field of blast furnace equipment, in particular to a sleeve-in-sleeve type tuyere small sleeve with a built-in valve sleeve, which comprises a small sleeve body, the front end of the small sleeve body is provided with an inner cooling chamber and an outer cooling chamber, and the rear end of the small sleeve body is provided with a public water inlet chamber and a public water return chamber; and each cooling chamber is communicated with the public water inlet chamber and the public water return chamber through a built-in valve. The public water inlet chamber and the public water return chamber are additionally arranged at the rear end of the small sleeve body, the public water inlet chamber and the public water return chamber are arranged at the positions connected with the middle sleeve, water exists in the public water inlet chamber and the public water return chamber for a long time, and the cooling effect of the rear end of the small sleeve cannot be affected due to the fact that the front end of the small sleeve body is damaged.

The utility model discloses a dismounting and mounting device for quickly dismounting and mounting middle and small sleeves of a blast furnace tuyere, which comprises a traveling vehicle body, a hydraulic-pneumatic hammer, a translation hydraulic cylinder and a tilting hydraulic cylinder, the hydraulic-pneumatic hammer, the translation hydraulic cylinder and the tilting hydraulic cylinder are assembled on the vehicle body, an anchor hook is assembled at the hammerhead end of the hydraulic-pneumatic hammer, a sliding seat is arranged between the hydraulic-pneumatic hammer and the vehicle body, and one end of the hydraulic-pneumatic hammer is rotatably connected with the sliding seat. The other end of the hydraulic-pneumatic hammer is rotationally connected with the other end of the sliding seat through a tilting hydraulic cylinder so as to drive the hydraulic-pneumatic hammer to tilt up and down and adjust the extension angle of the anchor hook, and the anchor hook extends and retracts by driving the sliding seat to advance and retreat, and the hook part is driven to hook the front end of a small sleeve in a tuyere or abut against the rear end of the small sleeve in the tuyere in a matched manner; therefore, the middle sleeve and the small sleeve of the tuyere can be quickly disassembled and assembled, the damping-down time of a blast furnace is shortened, the labor intensity of workers is effectively reduced, and the production efficiency is improved. The anchor hook can be used for correspondingly pulling out or propping against the middle sleeve and the small sleeve of the tuyere and synchronously driving the hook part to hit the front end or the rear end of the middle sleeve and the small sleeve of the tuyere.

The present invention provides a vertical furnace system and method for coordinating the treatment of iron-containing solid waste based on fuel and electric energy, wherein the system includes a gas pipe and a vertical smelting furnace, the vertical smelting furnace includes a fore furnace and a smelting furnace body, the smelting furnace body has a furnace body, a furnace belly and a furnace bottom arranged in sequence from top to bottom; a feeding port for adding materials to the furnace cavity of the smelting furnace body is provided on the upper side of the furnace body; an air enclosure pipe is provided around the furnace belly outside the furnace belly, and a plurality of tuyere connected to the inner cavity of the furnace belly is provided on the air enclosure pipe, plasma generators are installed in at least two tuyere, at least two tuyere are connected to the gas pipe, and the tuyere where the plasma generator is installed and the tuyere connected to the gas pipe are different tuyere; the furnace bottom is connected to the fore furnace. The power and furnace condition of the smelting furnace can be flexibly adjusted during the furnace opening and smelting process, and the system's requirements for the material structure in the furnace are reduced.

The utility model provides a blast furnace tuyere with a double-sealing structure function and a blast furnace. The blast furnace tuyere comprises a first air guide piece and a second air guide piece, the second air guide piece comprises a first flexible sealing piece, and the first flexible sealing piece is embedded between the inner wall of the first barrel and the outer wall of the second barrel in an interference mode; the third air guide piece comprises a second flexible sealing piece, and the second flexible sealing piece is embedded between the inner wall of the second barrel and the outer wall of the third barrel in an interference mode. The connecting gap of the tuyere is subjected to interference filling through the first flexible sealing piece and the second flexible sealing piece, even if the air guide piece deforms at a high temperature, the high sealing effect is achieved, and therefore the problem of blast furnace gas leakage is avoided. In addition, the replacement frequency of the elements can be greatly reduced, manpower and material resources are saved, and the operation efficiency is indirectly improved. Compared with a conventional blast furnace structure at the present stage, the blast furnace structure has the remarkable advantages of being simple in structure, low in cost, good in sealing effect, wide in application range, capable of reducing overhaul and replacement frequency and the like.

The present invention relates to an ironmaking system and method that couples solid oxide electrolysis with blast furnace waste heat utilization. The system comprises a solid oxide electrolysis system, a hot blast system, a heat exchange network, and a blast furnace body. The solid oxide electrolysis system, driven by the coupling of an external power source and blast furnace waste heat, produces hydrogen and oxygen by electrolyzing water. The hot blast system, fueled by blast furnace gas, continuously delivers high-temperature hot blast to the blast furnace. The heat exchange system uses the waste heat generated by the blast furnace to heat the fuel at the inlet of the solid oxide electrolysis cell and the hydrogen at the inlet of the blast furnace. The blast furnace body is used to reduce ore to smelt pig iron. By recycling waste heat from the blast furnace ironmaking process through the heat exchange network, heating the water at the inlet of the solid oxide electrolysis system and the hydrogen at the inlet of the blast furnace, the system effectively reduces the power consumption of the electrolytic hydrogen production process and is of great significance for the deep energy conservation and carbon reduction of blast furnace hydrogen-rich metallurgy technology.

The invention relates to the technical field of pulverized coal distributors, and discloses an intelligent uniform distribution blast furnace coal injection device which comprises a conical distribution chamber, the distribution chamber comprises a lower conical barrel and an upper conical cover detachably installed on the top of the lower conical barrel, and the bottom of the lower conical barrel fixedly communicates with a powder supply pipeline. According to the intelligent uniform distribution blast furnace coal injection device, uniform distribution and maintenance-free operation can be stably realized for a long time; by means of rotating airflow formed by the built-in flow guide element, pulverized coal is fully mixed and evenly distributed in the cavity and then shunted, the deviation of the amount of pulverized coal at the outlet of each branch pipe is extremely small, and the consistency of coal injection of all tuyeres is guaranteed. The method is crucial for stable operation of the blast furnace, fluctuation of the temperature and the reducing atmosphere in the furnace caused by uneven distribution can be reduced, the anti-blocking performance is greatly improved due to the unique design of the coarse particle settling tank, coarse particles and foreign matter are actively separated and collected and cannot enter an outlet pipeline, and the risk that an outlet pipe is blocked in the past is avoided.

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.