All-oxygen-rich hydrogen melting reduction furnace system

Abstract

This invention discloses an all-oxygen-rich hydrogen-enriched melting reduction furnace system, relating to the field of industrial furnace energy-saving retrofit technology. It includes a furnace frame, a control cabinet mounted on one end of the upper surface of the furnace frame, a control panel mounted on the side of the furnace frame near the control cabinet, a combustion chamber mounted in the middle of the upper surface of the furnace frame, a melting chamber mounted below the combustion chamber, and an air intake device mounted on the side of the furnace frame near the melting chamber, connected to the melting chamber. The all-oxygen-rich hydrogen-enriched melting reduction furnace system also includes a uniform air intake guiding mechanism and a combustion mixing mechanism. By rotating the air guide ring to drive the nozzle to periodically sweep the furnace bottom, 360° coverage without dead angles is achieved, eliminating the problem of local hydrogen accumulation or shortage caused by traditional fixed injection. Simultaneously, in conjunction with the circumferential guide baffle forcing the airflow to spiral upwards, the gas residence time is extended by 30-50%, increasing the hydrogen utilization rate from the traditional 60% to over 85%, and significantly enhancing the reduction uniformity.

Description

Technical Field

[0001] This invention relates to the field of energy-saving retrofitting technology for industrial furnaces, specifically to an all-oxygen-rich hydrogen-rich melting reduction furnace system. Background Technology

[0002] The hydrogen-rich melting reduction furnace uses hydrogen (H2) as the core reducing agent. It targets the iron oxide (mainly Fe2O3, with a small amount of Fe2O3 and FeO) as the core component in iron ore. It achieves the extraction of iron elements and the generation of molten iron through a stepwise reduction reaction. Its complete mechanism can be divided into two major stages: reduction and melting.

[0003] 1) Reduction Reaction Stage: Following the gradual transformation of iron oxide from high to low valence, hydrogen reacts sequentially with iron oxides of different valence states: First, in the temperature range of 300-570℃, hydrogen reacts with hematite (Fe2O3) to produce magnetite (Fe2O3) and water vapor, the reaction equation being 3Fe2O3 + H2 → 2Fe2O3 + H2O↑; Second, as the furnace temperature rises to 570-900℃, magnetite is further reduced by hydrogen to flostenite (Fe2O3). X O, x is between 0.84 and 0.95 (non-stoichiometric oxide), the reaction formula is Fe3O4 + H2 → 3Fe X O + H₂O↑; Thirdly, when the temperature reaches above 900℃, flostenite, as a transition state oxide, undergoes a deep reduction reaction with hydrogen to produce metallic iron (Fe) and water vapor. The reaction formula is Fe... X O + H2 → xFe + H2O↑, thus completing the transformation of iron from oxide to elemental iron.

[0004] 2) Melting and Iron Formation Stage: The elemental iron generated by reduction exists in the form of solid iron particles. A sustained high temperature (≥1500℃) is required in the furnace to melt these solid iron particles and separate them from the gangue (mainly composed of SiO2, Al2O3, CaO, etc.) associated with the iron ore. The heat for this process is mainly supplied by injecting pulverized coal, natural gas, or other high-calorific-value fuels into the furnace. The fuels burn fully in an oxygen-rich environment, releasing a large amount of heat energy (e.g., the combustion reaction of pulverized coal is C + O2 → CO2 (heat-generating reaction), and the combustion reaction of natural gas is CH4 + 2O2 → CO2 + 2H2O + heat). This maintains the high-temperature environment in the furnace, ensuring that the solid iron particles melt into liquid iron. Furthermore, the high temperature promotes the formation of low-melting-point slag from the gangue (e.g., SiO2 reacts with CaO to form CaSiO3, with a melting point of approximately 1544℃). The slag has a lower density than molten iron (molten iron density is approximately 7.0-7.5 g / cm³). 3 The density of the slag is approximately 2.5-3.0 g / cm³. 3The molten iron floats on the surface of the slag and is eventually discharged through the furnace body's slag outlet and molten iron outlet, respectively, thus achieving the purification and collection of the molten iron and completing the entire ironmaking process.

[0005] However, existing hydrogen-rich reduction furnaces typically introduce hydrogen directly above the furnace bottom. This leads to localized accumulation of hydrogen within the furnace, resulting in uneven hydrogen distribution and inconsistent reduction reaction rates across different areas. In areas with high local hydrogen concentrations, the reaction may become overly vigorous, easily leading to over-reduction and the generation of unwanted byproducts. Furthermore, due to its rapid diffusion, hydrogen entering the reduction furnace will quickly escape to the outlet without proper guidance. While this may minimize the difference in hydrogen concentration near the upper and lower layers of iron-bearing charge, the utilization rate of hydrogen is too low. In areas with low hydrogen concentrations, the iron ore cannot fully contact the hydrogen, resulting in incomplete reduction and ultimately reduced overall reaction efficiency and iron yield.

[0006] Furthermore, within the combustion chamber of the furnace, materials are typically placed in the chamber for static combustion. However, as the materials accumulate, the gaps between particles are compressed, especially for materials with high density and fine particles, easily forming a "dense layer." External oxygen struggles to diffuse into the material, resulting in an "oxygen-deficient environment." Simultaneously, if the material particles vary greatly in size (e.g., a mixture of large lumps and fine powder), the large lumps will compress the fine powder, creating localized "dead zones." Large lumps transfer heat slowly, making it difficult to reach the ignition point; fine powder may be compacted due to excessive density, lacking both oxygen and heat. Even if heat is generated from surface combustion, it is difficult to transfer to deeper layers through heat conduction or radiation (especially for materials with low thermal conductivity), resulting in insufficient internal temperature to initiate or maintain the combustion reaction.

[0007] Therefore, an all-oxygen-rich hydrogen-rich melting reduction furnace system was proposed to solve the above problems. Summary of the Invention

[0008] In view of this, the technical problem to be solved by the present invention is to propose an all-oxygen-rich hydrogen-rich melting reduction furnace system to solve the problems mentioned in the background art.

[0009] To achieve the above objectives, the present invention provides the following technical solution: an all-oxygen-rich hydrogen-rich melting reduction furnace system, comprising a furnace frame, a control cabinet installed at one end of the upper surface of the furnace frame, a control panel installed on the side of the furnace frame near the control cabinet, a combustion chamber installed in the middle of the upper surface of the furnace frame, a melting chamber installed below the combustion chamber, an air intake device installed on the side of the furnace frame near the melting chamber, the air intake device communicating with the melting chamber, and the all-oxygen-rich hydrogen-rich melting reduction furnace system further comprising a uniform air intake guiding mechanism and a combustion mixing mechanism;

[0010] The uniform air intake guide mechanism is located in the middle of the combustion chamber, and the uniform air intake guide mechanism is used for the full reduction of the reduction furnace;

[0011] The combustion mixing mechanism is located at the upper end of the combustion chamber and is used for the complete combustion reaction of materials.

[0012] Preferably, the uniform air intake guiding mechanism includes an air guide ring, which is installed on the upper surface of the inner wall of the melting chamber, and a support plate is uniformly fixedly installed on the circumference of the upper surface of the air guide ring.

[0013] Preferably, a connecting plate is fixedly installed at the end of the support plate away from the gas guide ring, the outer surface of the connecting plate is rotatably installed on the inner wall of the melting chamber, and a flow guide channel is opened in the middle of the connecting plate.

[0014] Preferably, a flow guide baffle is uniformly fixedly installed on the circumference of the upper surface of the connecting plate, a filter screen is fixedly installed on the middle circumference of the flow guide baffle, and a filter screen is installed on the flow guide baffle near the filter screen.

[0015] Preferably, the combustion mixing mechanism includes an arc-shaped guide plate, the bottom of which is fixedly mounted on the upper surface of the flow guide plate, and the arc-shaped guide plate is uniformly provided with heat flow holes, and the arc-shaped guide plate is configured as a cone.

[0016] Preferably, a concave flow guide is rotatably installed on the inner wall of the combustion chamber near the upper part of the arc-shaped guide plate. Triangular scrapers are symmetrically fixed on the inner side of the lower surface of the concave flow guide, and the bottom of the triangular scrapers is slidably installed on the upper surface of the arc-shaped guide plate. Conical grooves are respectively opened on the upper and lower surfaces of the concave flow guide.

[0017] Preferably, a drive shaft is provided in the conical groove in the middle of the concave guide shield. One end of the drive shaft is fixedly installed on the upper surface of the middle part of the arc-shaped guide plate, and the other end of the drive shaft is rotatably installed in the middle of the upper end of the combustion chamber.

[0018] Preferably, the melting chamber and combustion chamber are made of ultra-microporous high-purity carbon bricks and special ceramic composite materials, and the gas guide ring is made of non-oxide advanced ceramic or metal ceramic composite materials.

[0019] Preferably, the melting chamber and the combustion chamber are fixedly installed by bolts through a flange with a built-in high-temperature resistant sealing gasket.

[0020] Compared with the prior art, the all-oxygen-rich hydrogen-rich melting reduction furnace system provided by the present invention has the following beneficial effects:

[0021] 1. The gas distribution design solves the problem of hydrogen distribution; by driving the nozzle to periodically sweep the furnace bottom through the rotating gas guide ring, 360° coverage without dead angles is achieved, eliminating the problem of local hydrogen accumulation or shortage caused by traditional fixed injection. At the same time, in conjunction with the circumferential guide baffle to force the airflow to spiral upward, the gas residence time is extended by 30-50%, and the hydrogen utilization rate is increased from the traditional 60% to more than 85%, and the reduction uniformity is significantly enhanced.

[0022] 2. The dynamic combustion system overcomes the problem of material accumulation. This solution innovatively uses a 55-65° inclined conical guide shroud to achieve material impact dispersion, combined with a rotating arc-shaped guide plate and a triangular scraper for real-time cleaning, breaking up clumps and ensuring the uniformity of the material layer. The hot flow hole design allows high-temperature airflow to penetrate deep into the material, solving the problems of "oxygen deficiency in the dense layer" and "insufficient internal temperature" caused by static combustion.

[0023] 3. Extreme operating conditions and material technology ensure long-term operation; this solution uses ultra-microporous high-purity carbon bricks and special ceramic composite materials in the melting and combustion chambers. The micropores buffer thermal stress and withstand the 50°C high-temperature molten pool of the gas inlet device; rotating parts use non-oxide ceramics / cermets to resist the corrosion of reducing atmosphere. Combined with a double-sealing flange structure, a pressure drop rate of less than 0.1% is achieved, enabling the furnace lining to exceed fifteen years of service life.

[0024] 4. Energy recycling and intelligent control enable green smelting; this solution reduces the concentration of coal gas dust to 5g / Nm³ through a graded filtration system with filter screens and sieves. 3 Below, 85% of the purified coal gas is reused through CO2 adsorption; the waste heat from the flue gas is utilized in stages to generate electricity at temperatures above 1000℃ and to preheat ore at 500-800℃, driving a comprehensive energy utilization rate of over 85%. AI model early warning + acoustic monitoring enables ±1mm level furnace lining erosion detection, and fault shutdowns are controlled within hours.

[0025] 5. Strong adaptability to industrial application; rotary hydrogen injection supports a molten pool penetration depth of 1.5m and is compatible with 10mm pellets in the combustion mixing mechanism; the conical dispersion mechanism is suitable for easily agglomerated fuels such as pulverized coal and biomass, and precise process control, such as constant temperature of 50±20℃ for the air intake device and a hydrogen-oxygen ratio of 2:1, ensures a 100% qualified rate of molten iron, providing a reliable technical path for the large-scale application of hydrogen metallurgy. Attached Figure Description

[0026] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0027] Figure 2 This is an auxiliary schematic diagram of the three-dimensional structure of the present invention;

[0028] Figure 3 This is a schematic diagram showing the structural connection relationship between the uniform air intake guide mechanism and the combustion mixing mechanism of the present invention;

[0029] Figure 4 For the present invention Figure 3 Enlarged view of point A in the middle;

[0030] Figure 5 This is an auxiliary schematic diagram showing the connection relationship of the combustion mixing mechanism structure of the present invention;

[0031] Figure 6 For the present invention Figure 5 Enlarged view at point B in the middle;

[0032] Figure 7 For the present invention Figure 5 Enlarged view of point C in the middle.

[0033] In the picture:

[0034] 1. Furnace frame; 11. Control cabinet; 12. Control panel; 13. Melting chamber; 14. Combustion chamber; 15. Air intake device;

[0035] 2. Uniform air intake guiding mechanism; 21. Air guide ring; 22. Support plate; 23. Connecting plate; 24. Flow guide baffle; 25. Filter screen; 26. Filter sieve; 27. Flow guide channel;

[0036] 3. Combustion mixing mechanism; 31. Arc-shaped guide plate; 32. Triangular scraper; 33. Concave guide shield; 34. Drive shaft. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0039] For an example, please refer to... Figures 1 to 7 As shown:

[0040] To address the problems mentioned in the technical solutions, this application provides an all-oxygen-rich hydrogen-rich melting reduction furnace system, including a furnace frame 1, a control cabinet 11 installed at one end of the upper surface of the furnace frame 1, a control panel 12 installed on the side of the furnace frame 1 near the control cabinet 11, a combustion chamber 14 installed in the middle of the upper surface of the furnace frame 1, a smelting chamber 13 installed below the combustion chamber 14, and an air intake device 15 installed on the side of the furnace frame 1 near the smelting chamber 13, the air intake device 15 being connected to the smelting chamber 13. The all-oxygen-rich hydrogen-rich melting reduction furnace system also includes a uniform air intake guide mechanism 2 and a combustion mixing mechanism 3.

[0041] The uniform air intake guide mechanism 2 is located in the middle of the combustion chamber 14. The uniform air intake guide mechanism 2 is used for the full reduction of the reduction furnace.

[0042] The combustion mixing mechanism 3 is located at the upper end of the combustion chamber 14, and the combustion mixing mechanism 3 is used for the complete combustion reaction of materials.

[0043] The melting chamber 13 and combustion chamber 14 are constructed using ultra-microporous high-purity carbon bricks and special ceramic composite materials. The gas guide ring 21 is made of non-oxide high-grade ceramic or cermet composite materials. The melting chamber 13 and combustion chamber 14 are fixedly installed by bolts through flanges with built-in high-temperature resistant gaskets. A cooling water system is installed on the furnace frame 1. The cooling water system uses a circulating water pump to connect external cooling water and the heat insulation layer inside the furnace for cooling the furnace body.

[0044] Specifically, the gas guide ring 21 is installed on the upper surface of the inner wall of the melting chamber 13, and the support plate 22 is evenly fixedly installed on the upper surface of the gas guide ring 21. A connecting plate 23 is fixedly installed at the end of the support plate 22 away from the gas guide ring 21. The outer surface of the connecting plate 23 is rotatably installed on the inner wall of the melting chamber 13, and a flow channel 27 is opened in the middle of the connecting plate 23.

[0045] The flow channel 27 in the middle of the connecting plate 23 can be connected to the combustion chamber 14. A rotatable gas guide ring 21 is set and is rotatably installed above the inner wall of the melting chamber 13. A high-temperature resistant nozzle is installed on the ring so that hydrogen can be evenly injected into the furnace bottom. By rotating the gas guide ring 21, the nozzle periodically sweeps the furnace bottom area, eliminating the "dead zone" caused by fixed injection. This achieves 360° coverage of hydrogen at the bottom of the molten pool without dead angles, thereby avoiding the problem of unreacted overflow due to localized excessive hydrogen concentration near the fixed nozzle and insufficient reduction due to excessively low hydrogen concentration at the far end. This makes the reduction reaction more uniform across the cross-section of the molten pool.

[0046] Furthermore, such as Figure 4 As shown, a flow guide baffle 24 is uniformly fixedly installed on the circumference of the upper surface of the connecting plate 23, a filter screen 25 is fixedly installed on the circumference of the middle part of the flow guide baffle 24, and a filter screen 26 is installed on the flow guide baffle 24 near the filter screen 25.

[0047] A thick composite insulation layer is installed on the outer layer of the flow guide baffle to ensure sufficient insulation between the internal melting chamber and the outside. The innermost layer is made of heat-resistant high-temperature graphite material, with refractory bricks installed in the middle. The outer side of the refractory bricks is a cooling layer to cool the high temperature on the surface of the insulation layer. The cooling layer needs to be cooled by circulating water. The outermost layer is made of galvanized steel plate and other materials to prevent the internal insulation layer from being damaged by impact. This design, with its flow-guiding baffle 24, addresses the problem of traditional high-temperature coal gas containing unreacted H2 / CO, dust, and molten particles rising vertically, creating a "chimney effect" that leads to insufficient reaction of reducing gas before it enters the combustion chamber, resulting in low utilization. This design uses a circumferential vertical flow-guiding baffle 24 to create a swirling flow along the wall, extending the path and residence time by 30-50%, promoting secondary reaction between unreacted H2 / CO and the furnace charge, reducing gas "short-circuiting," improving reducing gas utilization, and achieving forced spiral ascent of the gas. Simultaneously, the swirling flow induces dust to settle in the furnace bottom area, forming a "protective dust layer" on the molten pool surface, suppressing molten pool splashing and heat loss. Furthermore, the distance between the control cabinet (11) and control panel (12) and the combustion and smelting chambers can be flexibly adjusted according to actual needs. It should be noted that, to better reflect the overall system integrity, the diagram shows that the reduction furnace body inevitably generates a large amount of heat radiation during operation. The issue of placing the control cabinet and related systems too close during operation poses a significant challenge to the hardware stability of the equipment; therefore, installation can be adjusted according to actual conditions.

[0048] Specifically, such as Figure 6 and Figure 7 As shown, the bottom of the arc-shaped guide plate 31 is fixedly installed on the upper surface of the flow guide plate 24. The arc-shaped guide plate 31 is uniformly provided with hot flow holes. The arc-shaped guide plate 31 is set to be conical. The inner wall of the combustion chamber 14 is rotatably installed near the upper part of the arc-shaped guide plate 31. The lower surface of the combustion mixing mechanism 3 is symmetrically fixedly installed with triangular scrapers 32. The bottom of the triangular scrapers 32 is slidably installed on the upper surface of the arc-shaped guide plate 31. The upper and lower surfaces of the concave flow guide plate 33 are respectively provided with conical grooves.

[0049] The conical groove has a cone surface inclination angle of 55-65 degrees. The cone surface inclination angle can guide the falling raw material to disperse radially, so that the falling raw material can be evenly scattered in the guide baffle 24. The filter residue is purified by the filtration of the filter screen 25 and the filter sieve 26. At the same time, the conical curved surface design can induce the airflow to form a centripetal vortex, prolonging the gas-raw material contact time.

[0050] Furthermore, a drive shaft 34 is provided in the concave groove in the middle of the concave guide shield 33. One end of the drive shaft 34 is fixedly installed on the upper surface of the middle part of the arc-shaped guide plate 31, and the other end of the drive shaft 34 is rotatably installed in the middle of the upper end of the combustion chamber 14.

[0051] The curved surface of the arc-shaped guide plate 31 can reduce material accumulation. At the same time, the rotation of the arc-shaped guide plate 31 and the fixation of the triangular scraper 32 can clean the surface of the arc-shaped guide plate 31. When combustion occurs inside the combustion chamber 14, the scraping of the raw material by the triangular scraper 32 can achieve uniform combustion of the raw material and reduce the occurrence of uneven combustion.

[0052] The specific implementation steps are as follows:

[0053] Phase 1: System Security Preparation

[0054] First, an airtightness verification was performed by introducing nitrogen gas at 0.5 MPa into the melting chamber 13 and combustion chamber 14 and maintaining the pressure for 30 minutes. If the pressure drop was less than 0.1%, green hydrogen with a purity ≥ 99.99% was switched on. Next, a gradient heating process was implemented, raising the furnace body of the melting chamber 13 and combustion chamber 14 to 800°C at a rate not exceeding 100°C / h via electric heating. Then, a hydrogen-oxygen mixed flame with a hydrogen-to-oxygen ratio of 2:1 in the combustion chamber 14 was ignited, and the temperature was continuously raised to 1250°C. Simultaneously, an 8 MPa closed-loop water cooling system was activated, and helium gas was used to protect the bearings of the rotating mechanism.

[0055] Iron ore, comprising over 85% of 310mm pellets in the combustion mixing mechanism, and flux, with an alkalinity of CaO / SiO2 = 1.2, enters the furnace through a hopper. During its descent, the raw material impacts a 55° angled SiC ceramic conical concave guide hood 33, achieving radial dispersion. Subsequently, the material is centrifugally spread using a porous metal-ceramic filter plate with a 35rpm rotating concave guide hood 33, ultimately forming a uniform material layer of 50±5cm. These steps effectively eliminate dead zones of material accumulation, controlling the permeability variation coefficient of the material layer to within 15% of the air intake device. The rotation of the concave guide hood 33 is achieved by a drive motor mounted on the upper surface of the combustion chamber 14, which, via a transmission shaft 34, drives the concave guide hood 33. The rotation of the concave guide hood 33, coupled with the sliding action of a triangular scraper 32 fixed at its bottom, ensures uniform material dispersion.

[0056] Furthermore, the rotating hydrogen injection ring, operating at a speed of 10-15 rpm (equivalent to the intake device) and a pressure of 0.8-1.2 MPa, penetrates 85% of the hydrogen-rich gas into the molten pool, with a penetration depth of not less than 1.5 m. The combustion chamber 14 supplies oxygen at 0.3 times the hydrogen flow rate, with a stoichiometric ratio of 0.9, thereby maintaining the furnace bottom temperature at 1550±20℃. The combustion chamber 14 is connected via a guide channel 27 in the middle of the connecting plate 23. A rotatable gas guide ring 21, mounted on the inner wall of the molten chamber 13, allows for uniform hydrogen injection into the furnace bottom via high-temperature resistant nozzles. The rotating gas guide ring 21 periodically sweeps the furnace bottom area, eliminating the "dead zone" caused by fixed injection, achieving 360° coverage of hydrogen at the bottom of the molten pool. This avoids the problems of localized excessive hydrogen concentration near the fixed nozzle leading to unreacted overflow and insufficient reduction at distant locations, resulting in a more uniform reduction reaction across the molten pool cross-section. Meanwhile, the baffle plate 24 forces the airflow to spiral upward, extending the gas residence time to 5-7 seconds. Through these operations, the hydrogen utilization rate can exceed 85%, and the molten pool temperature fluctuation can be controlled within ±20℃.

[0057] When the FeO content in the slag is detected to be less than 5%, the bottom slag opening of the melting chamber 13 is opened for water quenching and granulation treatment of the slag. Molten iron with a temperature not lower than 1480℃ flows into the torpedo ladle. For furnace gas treatment, it first passes through a 1mm filter screen 26 and undergoes pulse backflushing every 2 hours, then passes through a 0.2mm filter screen 25 and performs self-cleaning when the pressure difference exceeds 5kPa. After treatment, the dust concentration can be controlled below 5g / Nm³. Furthermore, 85% of the gas undergoes CO2 adsorption with an efficiency exceeding 90%, then is pressurized, reheated, and reused as reducing gas. Ultimately, the goal of 100% molten iron qualification rate and a gas circulation rate of not less than 85% is achieved.

[0058] Furthermore, when flue gas at temperatures exceeding 1000℃ drives a steam turbine to generate electricity, the conversion efficiency can reach 32%; waste heat at temperatures between 500-800℃ is used to preheat the ore to 300℃, reducing the ore's moisture content to below 0.5%; simultaneously, the helium gas used for cooling the rotating mechanism is cooled by a heat exchanger and then recycled. Through these energy recovery and utilization measures, the overall energy utilization rate can exceed 30%.

[0059] When shutting down the furnace, first stop feeding, then cool down to 1000℃ at a rate of 50℃ / h, and then purge with nitrogen to replace the hydrogen until the oxygen content is less than 0.1%, at which point stop purging. For maintenance, inject antioxidant grease into the magnetic actuator, and purge the filter plate bearings with argon gas to prevent oxidation.

[0060] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0061] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A full oxygen-rich hydrogen melting reduction furnace system, comprising a furnace frame (1), a control cabinet (11) installed at one end of the upper surface of the furnace frame (1), a control panel (12) installed on the side of the furnace frame (1) near the control cabinet (11), a combustion chamber (14) installed in the middle of the upper surface of the furnace frame (1), a smelting chamber (13) installed below the combustion chamber (14), and an air intake device (15) installed on the side of the furnace frame (1) near the smelting chamber (13), the air intake device (15) being connected to the smelting chamber (13), characterized in that, The full-oxygen hydrogen-rich smelting reduction furnace system device also comprises a uniform air inlet guiding mechanism (2) and a combustion mixing mechanism (3). The uniform air inlet guiding mechanism (2) is arranged in the middle of the combustion chamber (14), and is used for sufficient reduction of the reduction furnace; the uniform air inlet guiding mechanism (2) comprises a gas guiding ring (21) which is installed on the upper surface of the inner wall of the smelting chamber (13), and a supporting plate (22) is fixedly installed on the upper surface of the gas guiding ring (21) in a circumferential manner; the gas guiding ring (21) is rotated to periodically sweep the area of the furnace bottom by the spray head; The supporting plate (22) is fixedly installed with a connecting disc (23) at the end away from the gas guiding ring (21), and the connecting disc (23) is rotatably installed on the inner wall of the smelting chamber (13); a flow guiding channel (27) is formed in the middle of the connecting disc (23); A flow guiding baffle (24) is fixedly installed on the upper surface of the connecting disc (23) in a circumferential manner, and a filter screen (26) is installed above the filter screen (25) on the flow guiding baffle (24); The combustion mixing mechanism (3) is arranged at the upper end of the combustion chamber (14), and is used for sufficient combustion reaction of the material; the combustion mixing mechanism (3) comprises an arc-shaped guide plate (31) which is fixedly installed on the upper surface of the flow guiding baffle (24) at the bottom, and a plurality of hot flow holes are uniformly formed in the arc-shaped guide plate (31); and the arc-shaped guide plate (31) is arranged in a conical shape.

2. The full-oxygen hydrogen-rich smelting reduction furnace system apparatus of claim 1, wherein: A concave flow cover (33) is rotatably installed on the inner wall of the combustion chamber (14) above the arc-shaped guide plate (31), and a triangular scraper (32) is fixedly installed on the inner side of the lower surface of the concave flow cover (33) in a symmetrical manner; the triangular scraper (32) is slidably installed on the upper surface of the arc-shaped guide plate (31); and a conical groove is formed in the upper surface and the lower surface of the concave flow cover (33), respectively.

3. The full-oxygen hydrogen-rich smelting reduction furnace system apparatus of claim 2, wherein: A transmission shaft (34) is arranged in the conical groove in the middle of the concave flow cover (33), one end of the transmission shaft (34) is fixedly installed on the upper surface of the middle of the arc-shaped guide plate (31), and the other end of the transmission shaft (34) is rotatably installed at the upper end of the combustion chamber (14).

4. The full-oxygen hydrogen-rich smelting reduction furnace system apparatus of claim 1, wherein: The smelting chamber (13) and the combustion chamber (14) are made of ultra-microporous high-purity carbon bricks and special ceramic composite materials, and the gas guiding ring (21) is made of metal ceramic composite materials.

5. The full-oxygen hydrogen-rich smelting reduction furnace system apparatus of claim 1, wherein: The smelting chamber (13) and the combustion chamber (14) are fixedly installed by bolts through a flange and a built-in high-temperature-resistant sealing gasket.

Images