A high-efficiency reactor for phase transformation of refractory iron ore

Abstract

A high-efficiency reactor for phase transformation of refractory iron ore is disclosed. The reaction chamber and gas supply chamber are integrated into one structure, with the reaction chamber located directly above the gas supply chamber. The reaction chamber and gas supply chamber are separated by an air distribution plate with an elliptical arc cross-section. The reaction chamber adopts a horizontal oil tank-type structure with an elliptical cross-section, while the gas supply chamber has a crescent-shaped cross-section. The air distribution plate also has an elliptical arc cross-section. The reactor's length is divided into an inlet and an outlet, respectively. The reactor interior employs a multi-chamber structure with elliptical baffles. An arc-shaped notch is provided at the end of the baffle's major axis. The smooth curved reactor wall weakens the force exerted on the bulk material, further reducing the diffusion resistance of reducing gas, avoiding the formation of fluidization dead zones, improving bed fluidization, and facilitating smoother heat and mass transfer. This further enhances reaction efficiency, prevents coking of bulk material inside the reactor, and further improves the utilization rate of the reactor's internal space.

Description

Technical Field

[0001] This invention belongs to the field of mineral processing technology, and in particular relates to a high-efficiency reactor for the phase transformation of refractory iron ore. Background Technology

[0002] Currently, most of the iron ore resources in China are complex and difficult to process. Therefore, it is of great significance to strengthen the efficient development and utilization of complex and difficult-to-process iron ore resources.

[0003] Fluidization technology can effectively improve the contact and transport behavior between fluids and particles, significantly increasing the material and energy utilization and production efficiency of heterogeneous processes. As the medium for realizing fluidization technology, fluidized bed reactors have been widely used in the chemical industry. For example, patent application No. 202211531331.9 discloses a fluidized bed reactor, patent application No. 202210866473.4 discloses a photocatalytic fluidized bed reactor, and patent application No. 202221328849.8 discloses a methanol aromatization fluidized bed reactor.

[0004] In addition, fluidized bed reactors, as the core component of fluidized roasting equipment, have been applied to the efficient utilization of complex and difficult-to-process iron ore resources. For example, patent application No. 201510584190.0 discloses a graded suspension roasting device for complex and difficult-to-process iron ore; patent application No. 201710207721.3 discloses a multi-stage suspension magnetization roasting-magnetic separation system device and method for difficult-to-process iron ore; and patent application No. 201310329654.4 discloses a fluidized magnetic reduction roasting device.

[0005] To enhance the physicochemical reactions within the reactor, fluidized bed reactors are often modified. A common modification is to partition the shell side of the reactor to extend the residence time of the bulk material and promote the reaction. For example, patent application No. 202120756232.5 discloses a multi-stage fluidized bed solid particle steam generator, patent application No. 201820941003.9 discloses a horizontal multi-chamber fluidized bed, and patent application No. 201580068880.9 discloses a multi-stage fluidized bed flotation separator.

[0006] Traditional single-chamber fluidized bed reactors suffer from limited reaction space, insufficient residence time of bulk materials, and difficulty in achieving complete reaction. Furthermore, severe particle backmixing occurs within the single chamber, resulting in uneven and inadequate utilization of matter and energy.

[0007] While dividing the shell side of a single-chamber reactor with baffles can create a multi-chamber reactor, with the feed material added from one end and passing through each chamber sequentially to the other, thus extending the residence time and reducing backmixing, traditional multi-chamber reactors often employ a cuboid structure. This creates fluidization dead zones, where the reactor wall forces on the feed material are complex, and the diffusion resistance of reducing gas is high. This not only worsens bed fluidization but also restricts heat and mass transfer, leading to decreased reaction efficiency. Furthermore, the delayed heat and mass transfer can cause coking in the fluidization dead zones, further reducing the utilization of the reactor's internal reaction space. Therefore, addressing the fluidization dead zone problem is crucial for further improving reaction efficiency and reactor internal space utilization. Summary of the Invention

[0008] To address the problems existing in the prior art, this invention provides a high-efficiency reactor for the phase transformation of refractory iron ore. It adopts a horizontal oil tank-type structure with an elliptical cross-section for the reaction chamber, a crescent-shaped cross-section for the gas supply chamber, and an elliptical arc-shaped cross-section for the air distribution plate. The reactor's length is divided into an inlet and an outlet. The reactor interior utilizes a multi-chamber structure with elliptical baffles. An arc-shaped notch is provided at the end of the baffle's major axis. The smooth curved surface of the reactor wall weakens the force exerted on the bulk material, further reducing the diffusion resistance of the reducing gas, avoiding the formation of fluidization dead zones, improving bed fluidization, and facilitating smoother heat and mass transfer. This further enhances reaction efficiency, prevents coking of the bulk material inside the reactor, and further improves the utilization rate of the reactor's internal space.

[0009] To achieve the above objectives, the present invention adopts the following technical solution: a high-efficiency reactor for the phase transformation of refractory iron ore, comprising a reaction chamber and a gas supply chamber, wherein the reaction chamber and the gas supply chamber adopt an integrated structure; the reaction chamber is located directly above the gas supply chamber, and the reaction chamber and the gas supply chamber are separated by an air distribution plate, the cross-sectional shape of which is elliptical; the reaction chamber adopts a horizontal oil tank type structure, the cross-sectional shape of which is elliptical, and several baffles are arranged vertically and horizontally in the middle of the reaction chamber, and the baffles are distributed along the length direction of the reaction chamber; the baffles are elliptical in shape, and an arc-shaped notch is provided at the end of the major axis of the baffle; the gas supply chamber adopts a crescent-shaped structure, and several partitions are arranged in the middle of the gas supply chamber, the partitions dividing the middle of the gas supply chamber into several independent chambers, and the positions of the partitions correspond one-to-one with the baffles in the reaction chamber.

[0010] The reaction chamber is provided with an inlet and an outlet at both ends along its length. The inlet is located at the top of the reaction chamber, and the outlet is located at the side of the reaction chamber.

[0011] Each independent chamber in the air supply chamber is provided with an air inlet at the bottom.

[0012] The fluidized bed reactor is also equipped with a feeding system, a gas supply system, a product collection system, and a temperature control system.

[0013] The feeding system includes a silo, a screw feeder, a feeding pipeline, and a computer. The discharge port of the silo is connected to the inlet of the screw feeder, the discharge port of the screw feeder is connected to the inlet of the feeding pipeline, and the discharge port of the feeding pipeline is connected to an independent chamber in the reaction chamber through an inlet pipe. The control terminal of the screw feeder is electrically connected to the computer, and the computer controls the screw feeder to achieve quantitative feeding.

[0014] The gas supply system includes a gas storage tank, a gas supply pipeline, and a flow meter; the gas outlet of the gas storage tank is connected to the gas inlet of the gas supply pipeline, and the gas outlet of the gas supply pipeline is connected to an independent chamber in the gas supply room through the gas inlet pipe; the flow meter is installed on the gas supply pipeline.

[0015] The product collection system includes a receiving hopper, which is located directly below the discharge pipe.

[0016] The temperature control system includes a heater and a temperature control cabinet; the heater is installed on the inner wall of the top of the reaction chamber, and the heater is electrically connected to the temperature control cabinet. The temperature control cabinet controls the heater to realize the temperature monitoring and regulation in the reaction chamber.

[0017] The beneficial effects of this invention are:

[0018] The present invention relates to a high-efficiency reactor for the phase transformation of refractory iron ore, which adopts a horizontal oil tank-type structure. The reaction chamber has an elliptical cross-section, the gas supply chamber has a crescent-shaped cross-section, and the air distribution plate has an elliptical arc cross-section. The two ends along the length of the reactor are respectively designated as the feed end and the discharge end. The reactor interior adopts a multi-chamber structure, and the baffles are elliptical in shape with an arc-shaped notch at the end of the major axis of the baffle. The smooth curved surface of the reactor wall weakens the force exerted on the bulk material, further reduces the diffusion resistance of the reducing gas, avoids the generation of fluidization dead zones, improves bed fluidization, and facilitates smoother heat and mass transfer, further improving reaction efficiency, preventing coking of bulk material inside the reactor, and further improving the utilization rate of the reactor's internal space. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of a high-efficiency reactor for the phase transformation of refractory iron ore according to the present invention (when connected to a feeding system, a gas supply system, a product collection system and a temperature control system);

[0020] Figure 2 This is a schematic diagram (perspective view) of the structure of a high-efficiency reactor for phase transformation of refractory iron ore according to the present invention;

[0021] In the diagram, 1—reaction chamber, 2—gas supply chamber, 3—feed inlet, 4—discharge outlet, 5—silo, 6—screw feeder, 7—feeding pipeline, 8—computer, 9—gas storage tank, 10—gas supply pipeline, 11—flow meter, 12—feeding hopper, 13—heater, 14—temperature control cabinet. Detailed Implementation

[0022] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0023] like Figure 1 , 2 As shown, a high-efficiency reactor for phase transformation of refractory iron ore includes a reaction chamber 1 and a gas supply chamber 2, which are integrated into one unit. The reaction chamber 1 is located directly above the gas supply chamber 2, and the two chambers are separated by an air distribution plate with an elliptical cross-section. The reaction chamber 1 has a horizontal oil tank-type structure with an elliptical cross-section. Several baffles are distributed inside the reaction chamber 1 in an alternating manner, and these baffles are distributed along the length of the reaction chamber 1. The baffles are elliptical in shape, with an arc-shaped notch at the end of the major axis of the ellipse. The gas supply chamber 2 has a crescent-shaped structure, and several partitions are distributed inside the gas supply chamber 2, dividing the interior of the gas supply chamber 2 into several independent chambers. The positions of the partitions correspond one-to-one with the positions of the baffles in the reaction chamber 1. In this embodiment, there are four independent chambers in the air supply chamber 2. The four chambers are named chamber I, chamber II, chamber III and chamber IV along the length of the air supply chamber 2. Chambers I and III are used to implement the function of loosening air, and chambers II and IV are used to implement the function of fluidizing air.

[0024] The reaction chamber 1 is provided with a feed inlet 3 and a discharge outlet 4 at both ends along its length. The feed inlet 3 is located at the top of the reaction chamber 1, and the discharge outlet 4 is located at the side of the reaction chamber 1.

[0025] Each independent chamber in the air supply chamber 2 is provided with an air inlet at the bottom.

[0026] The fluidized bed reactor is also equipped with a feeding system, a gas supply system, a product collection system, and a temperature control system.

[0027] The feeding system includes a hopper 5, a screw feeder 6, a feeding pipe 7, and a computer 8. The discharge port of the hopper 5 is connected to the inlet of the screw feeder 6, the outlet of the screw feeder 6 is connected to the inlet of the feeding pipe 7, and the outlet of the feeding pipe 7 is connected to an independent chamber in the reaction chamber 1 through an inlet pipe 3. The control terminal of the screw feeder 6 is electrically connected to the computer 8, and the computer 8 controls the screw feeder 6 to achieve quantitative feeding.

[0028] The gas supply system includes a gas storage tank 9, a gas supply pipeline 10, and a flow meter 11; the gas outlet of the gas storage tank 9 is connected to the gas inlet of the gas supply pipeline 10, and the gas outlet of the gas supply pipeline 10 is connected to an independent chamber in the gas supply chamber 2 through the gas inlet; the flow meter 11 is installed on the gas supply pipeline 10.

[0029] The product collection system includes a receiving hopper 12, which is located directly below the discharge port 4.

[0030] The temperature control system includes a heater 13 and a temperature control cabinet 14. The heater 13 is installed on the top inner wall of the reaction chamber 1. The heater 13 is electrically connected to the temperature control cabinet 14. The temperature control cabinet 14 controls the heater 13 to realize temperature monitoring and regulation in the reaction chamber 1.

[0031] The following describes a single use of the present invention with reference to the accompanying drawings:

[0032] First, the iron ore is ground into iron ore powder, with 93% of the powder having a particle size of 0.8 mm or less. During feeding, the calibrated feed rate-motor speed equation is input into computer 18. Specifically, this equation is Gs = 1.608f - 1.44, where Gs is the feed rate (kg / h) and f is the motor speed (r / min). The feed rate is set to 80 kg / h. Subsequently, air is introduced into chambers I, II, III, and IV of the air supply chamber 2. The airflow rules for the four chambers are as follows: chambers I and III are used for loosening air, while chambers II and IV are used for fluidizing air, causing the iron ore powder to flow from chamber I. The material is moved to chamber IV until it is discharged from outlet 4, thus achieving material sealing. Then, heater 13 is started to maintain the temperature in reaction chamber 1 at 450℃~500℃. After the material discharge is stable, the air atmosphere is adjusted to a reducing atmosphere, and the gas flow rate of the four chambers remains unchanged. The iron ore powder completes the reduction reaction as it flows from chamber I to chamber IV. After continuous discharge for 15 minutes, screw feeder 16 is turned off, and the iron ore powder product that has completed the mineral phase transformation in hopper 12 is dried. Then, a sample is taken from the dried product and weighed. The sample is further ground, and the ground sample is finally subjected to magnetic separation test in a magnetic separator.

[0033] Example 1

[0034] The chemical composition analysis results of the iron ore are shown in Table 1, and the iron phase analysis results are shown in Table 2.

[0035] Table 1. Chemical composition analysis results of iron ore / % (Example 1)

[0036]

[0037] Table 2. Iron phase analysis results / % (Example 1)

[0038]

[0039]

[0040] As can be seen from Table 1, the main valuable element in iron ore is TFe, with a content of 37.65%; the main impurity components are SiO2 and Al2O3, with contents of 31.47% and 5.00%, respectively; and the harmful element is P, with a content of 0.72%.

[0041] As can be seen from Table 2, iron mainly exists in the form of hematite, with a content of 36.32% and an iron distribution rate of 96.47%.

[0042] First, the iron ore is ground into iron ore powder, with 93% of the powder having a particle size of 0.8 mm or less. During feeding, the calibrated feed rate-motor speed equation is input into computer 18. Specifically, the equation is Gs = 1.608f - 1.44, where Gs is the feed rate (kg / h) and f is the motor speed (r / min). The feed rate is set to 80 kg / h. Subsequently, air is introduced into chambers I, II, III, and IV of the air supply chamber 2, with air flow rates of 2 m³ / h for each chamber. 3 / h、5m 3 / h、2m 3 / h、5m 3 The flow rate is 1h, which causes the iron ore powder to flow from chamber I to chamber IV until it is discharged from outlet 4, thus achieving material sealing. After the discharge is stable, the air atmosphere is adjusted to a reducing atmosphere, while the gas flow rate in the four chambers remains unchanged. The reducing atmosphere contains N2, CO, and H2, with N2:CO:H2 = 3:1:2. The reducing atmosphere reacts with the iron ore powder at a reduction temperature of 500℃. After continuous discharge for 15 minutes, the screw feeder 16 is closed, and the iron ore powder product that has completed the mineral phase transformation in the docking hopper 12 is dried. Then, a sample is taken from the dried product and weighed. The sample is further ground. The proportion of particles with a diameter of 0.038 mm or less in the ground sample is 70%. Then, a magnetic separation test is carried out under a magnetic field strength of 85 kA / m. The test results are shown in Table 3.

[0043] Table 3. Results of Sorting Tests on Hydrogen-Based Mineral Phase Conversion Products / % (Example 1)

[0044]

[0045] As can be seen from Table 3, a magnetic iron concentrate product with a TFe grade of 59.86% and a recovery rate of 97.15% can be obtained.

[0046] Example 2

[0047] The chemical composition analysis results and iron phase analysis results of the iron ore are the same as those in Example 1. The difference from Example 1 is that the gas flow rate of the four chambers in gas supply chamber 2 is 1.5 m³ / s. 3 / h、5m 3 / h, 1.5m 3 / h、5m 3 / h. The test results of the magnetic separation test are shown in Table 4.

[0048] Table 4. Results of sorting test on hydrogen-based mineral phase conversion products / % (Example 2)

[0049]

[0050] As can be seen from Table 4, a magnetic iron concentrate product with a TFe grade of 60.95% and a recovery rate of 92.05% can be obtained.

[0051] Example 3

[0052] The chemical composition analysis results and iron phase analysis results of the iron ore are the same as those in Example 1. The difference from Example 1 is that the gas flow rate of the four chambers in gas supply chamber 2 is 1.5 m³ / s. 3 / h、4m 3 / h, 1.5m 3 / h、4m 3 / h. The test results of the magnetic separation test are shown in Table 5.

[0053] Table 5. Results of sorting tests on hydrogen-based mineral phase conversion products / % (Example 3)

[0054]

[0055] As can be seen from Table 5, a magnetic iron concentrate product with a TFe grade of 60.95% and a recovery rate of 92.10% can be obtained.

[0056] Example 4

[0057] The chemical composition analysis results of the iron ore are shown in Table 6, and the iron phase analysis results are shown in Table 7.

[0058] Table 6. Chemical composition analysis results of iron ore / % (Example 4)

[0059]

[0060] Table 7. Iron phase analysis results / % (Example 4)

[0061]

[0062] As can be seen from Table 6, the main valuable element in iron ore is TFe, with a content of 45.45%; the main impurity components are SiO2 and Al2O3, with contents of 13.44% and 5.80%, respectively; and the harmful element is P, with a content of 0.95%.

[0063] As can be seen from Table 7, iron mainly exists in the form of hematite, with a content of 45.04% and an iron distribution rate of 99.10%.

[0064] First, the iron ore is ground into iron ore powder, with 93% of the powder having a particle size of 0.8 mm or less. During feeding, the calibrated feed rate-motor speed equation is input into computer 18. Specifically, the equation is Gs = 1.608f - 1.44, where Gs is the feed rate (kg / h) and f is the motor speed (r / min). The feed rate is set to 80 kg / h. Subsequently, air is introduced into chambers I, II, III, and IV of the air supply chamber 2, with air flow rates of 1.5 m³ / h for each chamber. 3 / h、4m 3 / h, 1.5m 3 / h、4m 3 The flow rate is 1h, which causes the iron ore powder to flow from chamber I to chamber IV until it is discharged from outlet 4, thus achieving material sealing. After the discharge is stable, the air atmosphere is adjusted to a reducing atmosphere, while the gas flow rate in the four chambers remains unchanged. The reducing atmosphere contains N2, CO, and H2, with N2:CO:H2 = 3:1:2. The reducing atmosphere reacts with the iron ore powder at a reduction temperature of 500℃. After continuous discharge for 15 minutes, the screw feeder 16 is closed, and the iron ore powder product that has completed the mineral phase transformation in the docking hopper 12 is dried. Then, a sample is taken from the dried product and weighed. The sample is further ground. The proportion of particles with a diameter of 0.038 mm or less in the ground sample is 70%. Then, a magnetic separation test is carried out under a magnetic field strength of 85 kA / m. The test results are shown in Table 3.

[0065] Table 8. Results of Sorting Tests on Hydrogen-Based Mineral Phase Conversion Products / % (Example 4)

[0066]

[0067] As can be seen from Table 8, a magnetic iron concentrate product with a TFe grade of 62.11% and a recovery rate of 81.25% can be obtained.

[0068] Example 5

[0069] The chemical composition analysis results and iron phase analysis results of the iron ore were the same as those in Example 4. The difference from Example 4 was that the feed rate was set to 100 kg / h. The test results of the magnetic separation experiment are shown in Table 9.

[0070] Table 9. Results of Sorting Tests on Hydrogen-Based Mineral Phase Conversion Products / % (Example 5)

[0071]

[0072] As can be seen from Table 9, a magnetic iron concentrate product with a TFe grade of 61.19% and a recovery rate of 80.71% can be obtained.

[0073] Example 6

[0074] The chemical composition analysis and iron phase analysis results of the iron ore were the same as those in Example 4. The difference from Example 4 was that the reduction temperature was 530℃ and the magnetic field strength during magnetic separation was 85.5 kA / m. The test results of the magnetic separation experiment are shown in Table 10.

[0075] Table 10. Results of Sorting Tests on Hydrogen-Based Mineral Phase Conversion Products / % (Example 6)

[0076]

[0077] As can be seen from Table 10, a magnetic iron concentrate product with a TFe grade of 63.06% and a recovery rate of 82.53% can be obtained.

[0078] Example 7

[0079] The chemical composition analysis results of the iron ore are shown in Table 11, and the iron phase analysis results are shown in Table 12.

[0080] Table 11. Chemical composition analysis results of ore / % (Example 7)

[0081]

[0082] Table 12. Iron phase analysis results / % (Example 7)

[0083]

[0084] As shown in Table 11, the main valuable element in iron ore is TFe, with a content of 33.63%; the main impurity component is SiO2, with a content of 40.78%; the contents of impurities Al2O3, CaO, and MgO are relatively low, with contents of 0.92%, 2.13%, and 1.88%, respectively; the harmful elements are P and S, with contents of 0.05% and 0.02%, respectively.

[0085] As can be seen from Table 12, iron mainly exists in the form of hematite (brown iron), with a content of 19.23% and an iron distribution rate of 62.79%. Among them, iron carbonate minerals have a relatively high iron content, with a distribution rate of 18.02%; followed by magnetite, with a distribution rate of 17.14%. Iron sulfide minerals and iron silicate minerals have relatively low iron content, with distribution rates of 1.01% and 1.04% respectively. This part of the iron is the most difficult to enrich and recover.

[0086] First, the iron ore is ground into iron ore powder, with 95% of the powder having a particle size of 0.8 mm or less. During feeding, the calibrated feed rate-motor speed equation is input into computer 18. Specifically, the equation is Gs = 1.608f - 1.44, where Gs is the feed rate (kg / h) and f is the motor speed (r / min). The feed rate is set to 80 kg / h. Subsequently, air is introduced into chambers I, II, III, and IV of the air supply chamber 2, with air flow rates of 1.5 m³ / h for each chamber. 3 / h、4m 3 / h, 1.5m 3 / h、4m 3 The flow rate is 1h, which causes the iron ore powder to flow from chamber I to chamber IV until it is discharged from outlet 4, thus achieving material sealing. After the discharge is stable, the air atmosphere is adjusted to a reducing atmosphere, while the gas flow rate in the four chambers remains unchanged. The reducing atmosphere contains N2, CO, and H2, with N2:CO:H2 = 3:1:2. The reducing atmosphere reacts with the iron ore powder at a reduction temperature of 500℃. After continuous discharge for 15 minutes, the screw feeder 16 is closed, and the iron ore powder product that has completed the mineral phase transformation in the docking hopper 12 is dried. Then, a sample is taken from the dried product and weighed. The sample is further ground. The proportion of particles with a diameter of 0.038 mm or less in the ground sample is 70%. Then, a magnetic separation test is carried out under a magnetic field strength of 85 kA / m. The test results are shown in Table 13.

[0087] Table 13. Results of Sorting Tests on Hydrogen-Based Mineral Phase Conversion Products / % (Example 7)

[0088]

[0089] As can be seen from Table 13, after adopting the co-current hydrogen-based mineral phase conversion system and method of the present invention, a magnetic iron concentrate product with a TFe grade of 59.98% and a recovery rate of 95.24% can be obtained.

[0090] Example 8

[0091] The chemical composition analysis results and iron phase analysis results of the iron ore are the same as those of Example 7. The difference from Example 7 is that the feeding rate is set to 75 kg / h, the reduction temperature is 550℃, and the proportion of particles with a diameter of 0.038 mm or less in the ground sample is 80%. The test results of magnetic separation are shown in Table 14.

[0092] Table 14. Results of Sorting Tests on Hydrogen-Based Mineral Phase Conversion Products / % (Example 8)

[0093]

[0094] As can be seen from Table 14, a magnetic iron concentrate product with a TFe grade of 65.88% and a recovery rate of 97.06% can be obtained.

[0095] The solutions described in the embodiments are not intended to limit the scope of patent protection of this invention. All equivalent implementations or modifications that do not depart from the scope of this invention are included in the patent scope of this case.

Claims

1. A high efficiency reactor for mineralogical transformation of refractory iron ore characterized in that: The system includes a reaction chamber and a gas supply chamber, which are integrated into one unit. The reaction chamber is located directly above the gas supply chamber, and the two chambers are separated by an air distribution plate with an elliptical cross-section. The reaction chamber has a horizontal oil tank-type structure with an elliptical cross-section. Several staggered baffles are arranged within the reaction chamber, extending along its length. Each baffle is elliptical with an arc-shaped notch at its major axis. The gas supply chamber has a crescent-shaped structure with several partitions dividing it into independent chambers. The partitions correspond one-to-one with the baffles within the reaction chamber. The reaction chamber has an inlet and an outlet at its two ends along its length. The inlet is located at the top of the reaction chamber, and the outlet is located on the side. Each independent chamber within the gas supply chamber has an air inlet at its bottom.

2. The high-efficiency reactor for phase transformation of refractory iron ore according to claim 1, characterized in that: The fluidized bed reactor is also equipped with a feeding system, a gas supply system, a product collection system, and a temperature control system.

3. The high-efficiency reactor for phase transformation of refractory iron ore according to claim 2, characterized in that: The feeding system includes a silo, a screw feeder, a feeding pipeline, and a computer. The discharge port of the silo is connected to the inlet of the screw feeder, the discharge port of the screw feeder is connected to the inlet of the feeding pipeline, and the discharge port of the feeding pipeline is connected to an independent chamber in the reaction chamber through an inlet pipe. The control terminal of the screw feeder is electrically connected to the computer, and the computer controls the screw feeder to achieve quantitative feeding.

4. A high-efficiency reactor for phase transformation of refractory iron ore according to claim 2, characterized in that: The gas supply system includes a gas storage tank, a gas supply pipeline, and a flow meter; the gas outlet of the gas storage tank is connected to the gas inlet of the gas supply pipeline, and the gas outlet of the gas supply pipeline is connected to an independent chamber in the gas supply room through the gas inlet pipe; the flow meter is installed on the gas supply pipeline.

5. A high-efficiency reactor for phase transformation of refractory iron ore according to claim 2, characterized in that: The product collection system includes a receiving hopper, which is located directly below the discharge pipe.

6. A high-efficiency reactor for phase transformation of refractory iron ore according to claim 2, characterized in that: The temperature control system includes a heater and a temperature control cabinet; the heater is installed on the inner wall of the top of the reaction chamber, and the heater is electrically connected to the temperature control cabinet. The temperature control cabinet controls the heater to realize the temperature monitoring and regulation in the reaction chamber.

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