Metallurgical reaction device and metallurgical method

Abstract

The invention belongs to the technical field of metallurgical engineering, and discloses a metallurgical reaction device and a metallurgical method.The metallurgical reaction device comprises a material preparation mechanism and a blowing mechanism. The material preparation mechanism is used for mixing the first solid fuel and the second solid fuel according to a preset proportion to prepare mixed fuel; the blowing mechanism comprises a tuyere small sleeve, an air supply piece and a spray gun, the tuyere small sleeve is provided with a first flow channel, the first flow channel is communicated with an inner cavity of the furnace body, the air supply piece is provided with a second flow channel, the second flow channel is communicated with the first flow channel, and part of the spray gun is obliquely inserted into the air supply piece and the tuyere small sleeve; comprising a hydrogen-rich fuel injection pipe, a combustion-supporting gas injection pipe and a solid fuel injection pipe which are sequentially and coaxially arranged from inside to outside so as to inject hydrogen-rich fuel, combustion-supporting gas and mixed fuel into the first flow channel. The metallurgical reaction device can realize collaborative combustion of various fuels, effectively improve the combustion efficiency, improve the fluidity of slag, reduce the viscosity of the slag, and facilitate normal operation of a blast furnace and improvement of the quality of molten iron.

Description

Technical Field

[0001] The present invention relates to the technical field of metallurgical engineering, and particularly to a metallurgical reaction device and a metallurgical method. Background Art

[0002] In a blast furnace for ironmaking, oxygen-rich high-temperature gas is generally blown into the blast furnace from tuyeres through a blowing device. The high-temperature hot air reacts with fuels (coke, pulverized coal) in the furnace to generate CO, and CO reduces iron oxide in iron ore to generate iron. In order to promote the reduction reaction of fuels (coke, pulverized coal) and iron ore, when blowing oxygen-rich high-temperature gas at the tuyeres, gaseous, solid, and liquid fuels are blown simultaneously, so as to improve the smelting effect.

[0003] In the existing fuel injection technologies for metallurgical industrial blast furnaces / smelting reduction furnaces, the common ones are single-fuel or two-fuel injection methods. For example, traditional pulverized coal injection technology uses a single-sleeve lance to transport pulverized coal, and some use a double-sleeve lance to transport pulverized coal and combustion-supporting gas (such as oxygen) respectively. However, single-fuel or two-fuel injection is difficult to achieve the co-combustion of multiple fuels, the fuel combustion is insufficient, and the combustion efficiency is low. At the same time, the components in the slag are difficult to form a eutectic phase beneficial to reducing viscosity, the slag viscosity is high, which in turn affects the normal operation of the blast furnace and the quality of hot metal.

[0004] Therefore, there is an urgent need for a metallurgical reaction device and a metallurgical method to solve the above problems. Summary of the Invention

[0005] An object of the present invention is to provide a metallurgical reaction device, which can achieve the co-combustion of multiple fuels, effectively improve the combustion efficiency of fuels, and improve the fluidity of slag, reduce the slag viscosity, and is beneficial to the normal operation of the blast furnace and the improvement of hot metal quality.

[0006] To achieve this purpose, the present invention adopts the following technical solutions:

[0007] A metallurgical reaction device, comprising:

[0008] A material preparation mechanism, configured to mix a first solid fuel and a second solid fuel in a preset ratio and make a mixed fuel;

[0009] The injection mechanism includes a tuyere sleeve, a blast supply member, and a lance. The tuyere sleeve is arranged on the blast furnace body and has a first flow channel, and the first flow channel can communicate with the inner cavity of the furnace body. The blast supply member is arranged upstream of the tuyere sleeve and has a second flow channel, and the second flow channel is connected to the first flow channel. A part of the lance is obliquely inserted into the blast supply member and the tuyere sleeve, and the injection port of the lance is located in the first flow channel. The lance includes a hydrogen-rich fuel injection pipe, a combustion-supporting gas injection pipe, and a solid fuel injection pipe that are coaxially arranged in sequence from inside to outside. The hydrogen-rich fuel injection pipe, the combustion-supporting gas injection pipe, and the solid fuel injection pipe can respectively inject hydrogen-rich fuel, combustion-supporting gas, and the mixed fuel into the first flow channel.

[0010] Optionally, the time when the hydrogen-rich fuel is ejected from the outlet of the hydrogen-rich fuel injection pipe is the same as the time when the combustion-supporting gas is ejected from the outlet of the combustion-supporting gas injection pipe, and the time when the mixed fuel is ejected from the solid fuel injection pipe is greater than the ejection time of the hydrogen-rich fuel and the ejection time of the combustion-supporting gas.

[0011] Optionally, the inclination angle between the lance and the horizontal direction is 15°-30°.

[0012] Optionally, the material preparation mechanism includes a mixing component and a grinding component. The mixing component is used to mix the first solid fuel and the second solid fuel in a preset ratio, and the grinding component is arranged downstream of the mixing component and is used to co-grind the mixed first solid fuel and the second solid fuel to a preset specific surface area.

[0013] Optionally, the first solid fuel is iron ore, the second solid fuel is bituminous coal, and the preset ratio is 1:2-1:4; and / or,

[0014] The preset specific surface area ≥ 450m 2 / kg.

[0015] Optionally, the material preparation mechanism further includes an air classifier, which is connected between the grinding component and the solid fuel injection pipe of the lance and is used to separate particles with a particle size smaller than a preset particle size from the ground first solid fuel and the second solid fuel to prepare the mixed fuel.

[0016] Optionally, the preset particle size < 10μm.

[0017] Optionally, it further includes a temperature feedback mechanism, which is installed on the cover plate of the blowpipe peephole of the blast furnace, and the temperature feedback mechanism is used to measure the internal temperature of the blast furnace.

[0018] Optionally, the solid fuel injection pipe is made of a high-temperature resistant ceramic matrix composite material; and / or,

[0019] The combustion-supporting gas injection pipe is made of a steel pipe with a silicon nitride coating; and / or,

[0020] The hydrogen-rich fuel injection pipe is made of a Hastelloy C276 pipe.

[0021] Another object of the present invention is to provide a metallurgical method, which uses the above-mentioned metallurgical reaction device. The metallurgical method includes the following steps:

[0022] S1. Provide a first solid fuel and a second solid fuel, and prepare a mixed fuel through a material preparation mechanism;

[0023] S2. Feed the mixed fuel, the combustion-supporting gas, and the hydrogen-rich fuel into the solid fuel injection pipe, the combustion-supporting gas injection pipe, and the hydrogen-rich fuel injection pipe respectively, and spray them into the blast furnace through a spray gun.

[0024] Advantages of the present invention:

[0025] In the metallurgical reaction device provided by the present invention, the material preparation mechanism is used to mix the first solid fuel and the second solid fuel in a preset ratio and make a mixed fuel, thereby solving the defect that it is difficult to form a eutectic phase when the first solid fuel and the second solid fuel are separately processed in the traditional technology. The mixed fuel forms a eutectic phase with a low melting point during the combustion process, which can significantly improve the fluidity of the slag, and then reduce the slag viscosity, which is beneficial to the normal operation of the blast furnace and the improvement of the quality of molten iron. On the other hand, a spray gun structure with three-layer sleeves is adopted to realize the stratified injection and co-combustion of "mixed fuel, combustion-supporting gas, and hydrogen-rich fuel", making the mixing of the fuel more uniform and the combustion more complete, thereby effectively improving the combustion efficiency. Description of the drawings

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required to be used in the description of the embodiments of the present invention. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the content of the embodiments of the present invention and these drawings.

[0027] Figure 1 It is a schematic structural diagram of the spray gun provided by the embodiment of the present invention;

[0028] Figure 2 It is a schematic structural diagram of the metallurgical reaction device provided by the embodiment of the present invention.

[0029] In the figure:

[0030] 1. Material preparation mechanism; 11. Mixing component; 12. Grinding component; 13. Air classifier;

[0031] 2. Injection mechanism; 21. Tuyere sleeve; 211. First flow channel; 22. Air supply part; 221. Second flow channel; 23. Spray gun; 231. Hydrogen-rich fuel injection pipe; 232. Combustion-supporting gas injection pipe; 233. Solid fuel injection pipe. Specific embodiments

[0032] The technical solutions of the present invention will be further described below with reference to the accompanying drawings and through specific embodiments.

[0033] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. The components of the embodiments of the present invention usually described and illustrated in the drawings here can be arranged and designed in various different configurations.

[0034] Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0035] It should be noted that: Similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0036] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present invention is usually placed during use. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation of the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive distinction and cannot be construed as indicating or implying relative importance. In the description of the present invention, unless otherwise specified, the meaning of "plurality" is two or more.

[0037] In the description of the present invention, it should also be noted that unless otherwise clearly specified and defined, the terms "arrangement" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] In the present invention, unless otherwise clearly specified and defined, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature. The first feature being "below", "under" and "beneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the first feature has a lower horizontal height than the second feature.

[0039] In the description of the present invention, the term "and / or" is merely a relationship describing associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist simultaneously, and B exists alone. Additionally, in the present invention, the character " / " generally represents an "or" relationship between the associated objects before and after.

[0040] The embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation of the present invention.

[0041] Embodiment 1

[0042] As Figure 1 and Figure 2 shown, this embodiment provides a metallurgical reaction device, which can be used in the fuel injection technology of blast furnaces / smelting reduction furnaces in the metallurgical industry. Specifically, the metallurgical reaction device includes a material preparation mechanism 1 and a blowing mechanism 2.

[0043] In this embodiment, the material preparation mechanism 1 is used to mix the first solid fuel and the second solid fuel in a preset ratio and make a mixed fuel.

[0044] It can be understood that the first solid fuel is iron ore (FeO x ), and the second solid fuel is bituminous coal (CaO / MgO). In this embodiment, by constructing a blend system of iron ore fines and pulverized coal, FeO in the mixed fuel xThe components form a low-melting eutectic phase with CaO / MgO in coal ash, and the melting point is reduced by 150 - 200 °C, which can significantly improve the fluidity of the slag. The slag viscosity is reduced from 2.5 - 3.0 Pa·s to 1.8 - 2.2 Pa·s at 1500 °C, which is beneficial to the normal operation of the blast furnace and the improvement of hot metal quality.

[0045] Specifically, referring to Figure 2 , the material preparation mechanism 1 includes a mixing component 11, a grinding component 12, and an air classifier 13 arranged in sequence. The mixing component 11 is used to mix the first solid fuel and the second solid fuel in a preset ratio. In this embodiment, iron ore (TFe≥62%) and bituminous coal (volatile matter 25 - 35%) are mixed in a ratio of 1:2 - 1:4. Next, through the grinding component 12, the mixed first solid fuel and second solid fuel are co-ground to a preset specific surface area, making the material particles finer and increasing the reaction activity. Preferably, the preset specific surface area ≥ 450 m 2 / kg. Finally, through the air classifier 13 connected between the grinding component 12 and the solid fuel injection pipe 233 of the spray gun 23, particles with a particle size smaller than the preset particle size (preset particle size < 10 μm, proportion < 5%) are separated from the ground first solid fuel and second solid fuel to prepare a mixed fuel. Using the air classifier 13 to separate ultrafine particles can avoid the influence of ultrafine particles on the injection mechanism 2.

[0046] Furthermore, when mixing the materials, adding 0.5% - 1.2% of the organosilicon modifier can improve the fluidity, making the mixed material have the characteristics of self-fluidization and facilitating injection. Of course, in other embodiments, the organosilicon modifier can be a polysiloxane-based modifier, which also has good surface activity and lubricating properties and can improve the fluidity of the mixed material.

[0047] Continuing to refer to Figure 1 and Figure 2 , the injection mechanism 2 includes a tuyere sleeve 21, a air supply member 22, and a spray gun 23. The tuyere sleeve 21 is arranged on the blast furnace body and has a first flow channel 211, and the first flow channel 211 can communicate with the inner cavity of the furnace body. The air supply member 22 is arranged upstream of the tuyere sleeve 21 and has a second flow channel 221, and the second flow channel 221 is connected to the first flow channel 211. A part of the spray gun 23 is inserted obliquely into the air supply member 22 and the tuyere sleeve 21, and the injection port of the spray gun 23 is located in the first flow channel 211. The air supply member 22 supplies air into the furnace body through the second flow channel 221 and the first flow channel 211.

[0048] The spray gun 23 includes a hydrogen-rich fuel injection pipe 231, a combustion-supporting gas injection pipe 232, and a solid fuel injection pipe 233 that are coaxially arranged from inside to outside in sequence. The hydrogen-rich fuel injection pipe 231, the combustion-supporting gas injection pipe 232, and the solid fuel injection pipe 233 can respectively inject hydrogen-rich fuel, combustion-supporting gas, and mixed fuel into the first flow channel 211. In this embodiment, the hydrogen-rich fuel is LNG (premixed with 5% CO2), and the combustion-supporting gas is pure oxygen. This embodiment adopts the spray gun 23 structure with three-layer sleeves to achieve the stratified injection and collaborative combustion of "mixed fuel, combustion-supporting gas, and hydrogen-rich fuel", making the mixing of the fuel more uniform and the combustion more complete, thereby effectively improving the combustion efficiency.

[0049] Specifically, the time when the hydrogen-rich fuel sprays out from the outlet of the hydrogen-rich fuel injection pipe 231 is the same as the time when the combustion-supporting gas sprays out from the outlet of the combustion-supporting gas injection pipe 232, and the time when the mixed fuel sprays out from the solid fuel injection pipe 233 is greater than the spraying time of the hydrogen-rich fuel and the combustion-supporting gas. That is to say, the spray gun 23 can achieve the gradient stratified injection of solid, gas, and combustion-supporting gas, forming a three-stage combustion system of "gas fuel preheating → solid fuel main combustion → combustion-supporting gas strengthening". Namely: The first stage of combustion: Near the outlet of the spray gun, LNG first contacts pure oxygen and starts to burn. Since LNG is premixed with 5% CO2, the combustion speed is controlled, forming a relatively stable initial combustion area. At this time, the pulverized coal also begins to be affected by the high-temperature environment, gradually preheats and starts to burn partially. The second stage of combustion: As the fuel rises, the combustion of the pulverized coal gradually intensifies under the action of high temperature and sufficient oxygen. At the same time, the heat generated by the combustion of LNG further promotes the combustion of the pulverized coal, forming a more intense combustion stage. The spray gun inclination angle is set to 15° - 30°, making the fuel form a spiral upward combustion trajectory, increasing the contact area between the fuel and the air, and improving the combustion efficiency. The third stage of combustion: In a specific area inside the blast furnace, the remaining fuel continues to burn until it is completely burned.

[0050] Specifically, in this embodiment, the solid fuel injection pipe 233 is made of a high-temperature resistant ceramic matrix composite material. This material has excellent high-temperature resistance and wear resistance, and can withstand the erosion caused by the high-speed flow of pulverized coal. The flow rate of the pulverized coal is controlled at 8 - 12 m / s to ensure that the pulverized coal can stably enter the blast furnace. The combustion-supporting gas injection pipe 232 is made of a steel pipe with a silicon nitride coating. The silicon nitride coating has good corrosion resistance and can prevent the corrosion of the pipeline by pure oxygen. The pure oxygen delivery pressure is 0.8 - 1.2 MPa, providing sufficient oxygen for the combustion of pulverized coal. The hydrogen-rich fuel injection pipe 231 is made of Hastelloy C276 pipe. This alloy has good high-temperature resistance and corrosion resistance, ensuring the safe delivery and stable combustion of LNG. At the same time, due to the use of special materials such as high-temperature resistant ceramic matrix composite materials, steel pipes with silicon nitride coatings, and Hastelloy C276 pipes, the high-temperature resistance, wear resistance, and corrosion resistance of the spray gun 23 are improved. The service life of the spray gun 23 is extended from 1.5 - 2 months to 3 - 4 months, reducing the replacement frequency of the spray gun 23 and lowering the production cost.

[0051] Of course, in other embodiments, the material of the solid fuel injection pipe 233 can be considered to be a silicon carbide ceramic composite material, which also has excellent high-temperature resistance and wear resistance and can meet the requirements of pulverized coal transportation. The material of the combustion-supporting gas injection pipe 232 can be selected as a boron carbide coating, which has high hardness and good corrosion resistance and can replace the silicon nitride coating. The material of the hydrogen-rich fuel injection pipe 231 can be selected as Inconel alloy, which has good performance in high-temperature and corrosive environments and can be used as a substitute material for Hastelloy C276 pipe.

[0052] Furthermore, it is also necessary to control the injection parameters. The carrier gas for the mixed material is a N2-CO2 mixed gas (CO2 accounts for 15 - 25%) preheated to 300 °C. The preheated carrier gas helps to increase the temperature of the mixed material and promote the combustion reaction. The injection speed is 18 - 25 m / s, and the material concentration is 350 - 500 g / Nm 3 , ensuring that the mixed material can be evenly injected into the blast furnace. A swirler (swirl number SN = 0.6 - 0.8) is set at the front end of the tuyere, so that the mixed material forms a swirl when entering the blast furnace, enhancing the mixing effect.

[0053] Optionally, the metallurgical reaction device further includes a temperature feedback mechanism (not shown in the figure). The temperature feedback mechanism is installed on the viewing hole cover plate of the blast pipe of the blast furnace, and the temperature feedback mechanism is used to measure the internal temperature of the blast furnace. According to the temperature feedback of the temperature feedback mechanism, the fuel ratio of each layer is dynamically adjusted, with the LNG ratio being 10 - 30%, the pulverized coal being 60 - 85%, and the oxygen excess coefficient being 1.05 - 1.15. The inclination angle of the spray gun is set to 15° - 30°, so that the fuel forms a spiral upward combustion trajectory, increasing the contact area between the fuel and the air and improving the combustion efficiency.

[0054] Embodiment 2

[0055] This embodiment provides a metallurgical method, which uses the metallurgical reaction device provided in Embodiment 1 for blast furnace smelting. This metallurgical method includes the following steps:

[0056] S1. Provide a first solid fuel and a second solid fuel, and prepare a mixed fuel through the material preparation mechanism 1.

[0057] Specifically, step S1 specifically includes the following steps:

[0058] S11. Mix the first solid fuel and the second solid fuel in a preset ratio through the mixing component 11.

[0059] In this embodiment, iron ore (TFe≥62%) and bituminous coal (volatile matter 25-35%) are mixed in a ratio of 1:2 - 1:4.

[0060] S12. Co-grind the mixed first solid fuel and second solid fuel to a preset specific surface area through the grinding component 12. The preset specific surface area ≥ 450m 2 / kg.

[0061] S13. Separate the particles with a particle size smaller than the preset particle size (preset particle size < 10μm, proportion < 5%) from the ground first solid fuel and second solid fuel through the air classifier 13 to prepare and form a mixed fuel.

[0062] S2. Feed the mixed fuel, combustion-supporting gas, and hydrogen-rich fuel into the solid fuel injection pipe, combustion-supporting gas injection pipe, and hydrogen-rich fuel injection pipe respectively, and inject them into the blast furnace through the spray gun.

[0063] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation manners of the present invention. For those of ordinary skill in the art, other different forms of changes or variations can be made based on the above description. It is not necessary and impossible to list all the implementation manners here. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A metallurgical reaction device, characterized in that: include: A material preparation mechanism (1) is used to mix a first solid fuel and a second solid fuel in a preset ratio to form a mixed fuel; The spray mechanism (2) comprises a tuyere sleeve (21), an air supply member (22) and a spray gun (23), wherein the tuyere sleeve (21) is arranged on a blast furnace body and has a first flow channel (211), wherein the first flow channel (211) can be communicated with an inner cavity of the furnace body, the air supply member (22) is arranged upstream of the tuyere sleeve (21) and has a second flow channel (221), wherein the second flow channel (221) is communicated with the first flow channel (211), and a part of the spray gun (23) is obliquely inserted into the air supply member (22). and in the tuyere sleeve (21), the spray port of the spray gun (23) is located in the first flow channel (211), the spray gun (23) comprises a hydrogen-rich fuel spray pipe (231), a combustion-supporting gas spray pipe (232) and a solid fuel spray pipe (233) which are coaxially arranged in sequence from the inside to the outside, and the hydrogen-rich fuel spray pipe (231), the combustion-supporting gas spray pipe (232) and the solid fuel spray pipe (233) can respectively spray the hydrogen-rich fuel, the combustion-supporting gas and the mixed fuel into the first flow channel (211).

2. The metallurgical reaction device according to claim 1, characterized in that: The time when the hydrogen-rich fuel is ejected from the outlet of the hydrogen-rich fuel injection pipe (231) is the same as the time when the combustion-supporting gas is ejected from the outlet of the combustion-supporting gas injection pipe (232), and the time when the mixed fuel is ejected from the solid fuel injection pipe (233) is greater than the ejection time of the hydrogen-rich fuel and the ejection time of the combustion-supporting gas.

3. The metallurgical reaction device according to claim 1, characterized in that: The spray gun (23) has an inclination angle of 15°-30° with respect to the horizontal direction.

4. The metallurgical reaction device according to claim 1, characterized in that: The material preparation mechanism (1) comprises a mixing component (11) and a grinding component (12), wherein the mixing component (11) is used to mix the first solid fuel and the second solid fuel in a preset ratio, and the grinding component (12) is arranged downstream of the mixing component (11) and is used to grind the mixed first solid fuel and the second solid fuel together to a preset specific surface area.

5. The metallurgical reaction device according to claim 4, characterized in that: The first solid fuel is iron ore, the second solid fuel is bituminous coal, and the preset ratio is 1:2-1:4; and / or, The preset specific surface area is ≥450m 2 / kg.

6. The metallurgical reaction device according to claim 4, characterized in that: The material preparation mechanism (1) further comprises an airflow classifier (13), which is connected between the grinding assembly (12) and the solid fuel injection pipe (233) of the spray gun (23) and is used to separate particles having a particle size smaller than a preset particle size from the first solid fuel and the second solid fuel after grinding to prepare the mixed fuel.

7. The metallurgical reaction device according to claim 6, characterized in that: The preset particle size is less than 10 μm.

8. The metallurgical reaction device according to claim 1, characterized in that: It also includes a temperature feedback mechanism installed on the blowpipe peephole cover plate of the blast furnace, and the temperature feedback mechanism is used to measure the internal temperature of the blast furnace.

9. The metallurgical reaction device according to any one of claims 1 to 8, characterized in that: The solid fuel injection pipe (233) is made of a high temperature resistant ceramic-based composite material; and / or, The combustion-supporting gas injection pipe (232) is made of a silicon nitride coated steel pipe; and / or, The hydrogen-rich fuel injection pipe (231) is made of Hastelloy C276 pipe.

10. A metallurgical method, characterized in that Using the metallurgical reaction device according to any one of claims 1 to 9, the metallurgical method comprises the following steps: S1. providing a first solid fuel and a second solid fuel, and preparing a mixed fuel through a material preparation mechanism (1); S2, respectively introducing the mixed fuel, combustion-supporting gas and hydrogen-rich fuel into the solid fuel injection pipe (233), the combustion-supporting gas injection pipe (232) and the hydrogen-rich fuel injection pipe (231), and spraying them into the blast furnace through the spray gun (23).

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