Screw propulsion type electromagnetic induction heating furnace

Abstract

The utility model provides a spiral propulsion type electromagnetic induction heating furnace which comprises a heating pipe, a driving device and a spiral propulsion rod, the first end of the spiral propulsion rod is connected with the driving device, and the second end of the spiral propulsion rod extends into the heating pipe and is used for rotating relative to the heating pipe; an electromagnetic induction coil is arranged outside the heating pipe and used for heating the interior of the heating pipe. According to the utility model, the spiral pushing rod rotates in the heating pipe, so that a to-be-reduced metal oxide can continuously advance in the heating process, and the electromagnetic induction coil heats the interior of the heating pipe, thereby realizing continuous heating and reduction; meanwhile, due to the adoption of an electromagnetic induction heating mode, rapid heating and cooling can be achieved, and energy is further saved; by arranging the electromagnetic induction heating chambers with different temperatures, the temperature and time of the reduction reaction can be controlled in stages, so that the production requirements are better met.

Description

Technical Field

[0001] This application relates to the field of oxidation-reduction reaction equipment technology, and in particular to a spiral propulsion electromagnetic induction heating furnace. Background Technology

[0002] In nature, most metals exist in the form of metal oxides. Therefore, the reduction of metal oxides is an important step in metal smelting. However, in the reduction furnaces widely used in the market, the metal oxides to be reduced are generally heated, reduced, and cooled to solidify at fixed reaction sites. In this process, the reduction furnace needs to be frequently heated and cooled, wasting a lot of energy and failing to meet the requirements of energy conservation and emission reduction.

[0003] Patent CN 202120940583.1 proposes a self-heating gas-based vertical shaft furnace direct reduction device. Its feature is that the interior of the vertical shaft furnace is divided into a preheating section, a reduction section, a transition section, and a cooling section. The transition section consists of multiple parallel cavities, each of which is wound with an electromagnetic induction coil. However, this patent is similar to extending the reduction section of the vertical shaft furnace. After the reduction is completed, induction heating is applied to preheat the reducing gas. To a certain extent, some heat is carried to the upper part through the gas. However, the disadvantage is that the efficiency of gas-solid heat transfer is low. At the same time, the heat transfer is not synchronized with the reduction of iron oxides in the furnace charge. In particular, a large amount of hydrogen gas still escapes due to the low temperature of the upper part of the furnace charge, which affects the further improvement of the reducing gas and heat utilization rate.

[0004] Patent CN202323423890.0 discloses an induction cooker for heating and reducing oxide minerals, comprising a furnace body and an electromagnetic induction device. The furnace body is composed of several layers of refractory bricks, and the interior of the furnace body is a vacuum reduction chamber. A material inlet is located at the top of the furnace body, and a material outlet is located on the side or bottom of the furnace body. The electromagnetic induction device includes an electromagnetic coil mounted on the side wall of the furnace body and a control system connected to the electromagnetic coil. The electromagnetic coil is positioned between the several layers of refractory bricks. This application's hydrogen-based induction cooker for reducing oxide minerals is used in conjunction with electric furnace smelting and metallurgy. The induction cooker uses the principle of electromagnetic induction heating to heat the oxide minerals, and then introduces hydrogen gas to conduct a reduction reaction in a high-temperature, air-sealed environment, causing the oxide minerals to generate elemental metals. The metals are then discharged from the induction cooker at a high temperature and loaded into the electric furnace for smelting and metallurgical separation. However, this device cannot effectively control the temperature and time of the reduction reaction in stages, and its output is limited. Utility Model Content

[0005] This application is made in view of the above-mentioned problems, and its purpose is to provide a spiral propulsion electromagnetic induction heating furnace.

[0006] Specifically, the first aspect of this application provides a spiral propulsion electromagnetic induction heating furnace, including a heating tube, a driving device, and a spiral propulsion rod. The first end of the spiral propulsion rod is connected to the driving device, and the second end of the spiral propulsion rod extends into the interior of the heating tube for rotation relative to the heating tube. An electromagnetic induction coil is provided outside the heating tube for heating the interior of the heating tube.

[0007] Furthermore, the heating element, the driving device, and the spiral propulsion rod form a set of electromagnetic induction heating chambers; the spiral propulsion electromagnetic induction heating furnace includes several sets of electromagnetic induction heating chambers.

[0008] Furthermore, the spiral propulsion electromagnetic induction heating furnace includes a low-temperature electromagnetic induction heating chamber, a medium-temperature electromagnetic induction heating chamber, and a high-temperature electromagnetic induction heating chamber.

[0009] Furthermore, each of the low-temperature electromagnetic induction heating chamber, the medium-temperature electromagnetic induction heating chamber, and the high-temperature electromagnetic induction heating chamber shall be provided with at least one set of electromagnetic induction heating chambers.

[0010] Furthermore, the heating element is provided with an inlet and an outlet; the outlet of the low-temperature electromagnetic induction heating chamber is connected to the inlet of the medium-temperature electromagnetic induction heating chamber, and the outlet of the medium-temperature electromagnetic induction heating chamber is connected to the inlet of the high-temperature electromagnetic induction heating chamber; and / or

[0011] The heating element is provided with a temperature control and exhaust hole that is directly opposite the discharge port.

[0012] Furthermore, the drive device includes an electric motor and an electric gearbox, the electric motor being connected to the electric gearbox, and the electric gearbox being connected to the helical push rod.

[0013] Furthermore, the helical propeller is connected to the heating element via a bearing.

[0014] Furthermore, the heating tube is covered with an electromagnetically conductive ceramic tube, and the electromagnetic induction coil is wound around the electromagnetically conductive ceramic tube.

[0015] Furthermore, the outer side of the electromagnetic thermally conductive ceramic tube is covered with high-temperature resistant heat-insulating cotton, and the electromagnetic induction coil is wound on the high-temperature resistant heat-insulating cotton.

[0016] Furthermore, it also includes an electromagnetic induction cabinet for connecting to an electromagnetic induction coil.

[0017] This utility model has the following beneficial effects:

[0018] This utility model discloses a spiral-propelled electromagnetic induction heating furnace, comprising a heating tube, a driving device, and a spiral propeller. The spiral propeller is connected to the driving device. Through rotation within the heating tube, the metal oxide to be reduced continuously advances during the heating process. The electromagnetic induction coil heats the interior of the heating tube, thus achieving continuous heating and reduction. This design not only improves heating efficiency but also makes the reduction reaction more uniform, improving product quality. Furthermore, the use of electromagnetic induction heating allows for rapid heating and cooling, further saving energy. In addition, by setting electromagnetic induction heating chambers at different temperatures, the temperature and time of the reduction reaction can be controlled in stages, better meeting production needs. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this drawing or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this drawing. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of a spiral propulsion electromagnetic induction heating furnace.

[0021] Figure 2 This is a schematic diagram of the structure of a low-temperature electromagnetic induction heating chamber.

[0022] Explanation of reference numerals: 1. Heating element; 2. Electric motor; 3. Screw propeller; 4. Electromagnetic induction coil; 5. Low-temperature electromagnetic induction heating chamber; 6. Medium-temperature electromagnetic induction heating chamber; 7. High-temperature electromagnetic induction heating chamber; 8. Feed inlet; 9. Discharge outlet; 10. Electric gearbox; 11. Bearing; 12. High-temperature resistant insulation cotton; 13. Electromagnetic induction cabinet; 14. Temperature-controlled exhaust port; 15. Spiral blade; 16. Electromagnetic thermally conductive ceramic tube.

[0023] The purpose, features, and advantages of this accompanying drawing will be further explained in conjunction with the embodiments and with reference to the accompanying drawing. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this application clearer, the following description and illustration are provided in conjunction with embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application. All other embodiments obtained by those skilled in the art based on the embodiments provided in this application without inventive effort are within the scope of protection of this application.

[0025] Obviously, the following description is merely some examples or embodiments of this application. Those skilled in the art can apply this application to other similar scenarios without any inventive effort. Furthermore, it is understood that although the effort involved in such development may be complex and lengthy, for those skilled in the art related to the content disclosed in this application, any changes to design, manufacturing, or production based on the technical content disclosed in this application are merely conventional technical means and should not be construed as insufficient disclosure of the content of this application.

[0026] See Figures 1 to 2 A spiral propulsion electromagnetic induction heating furnace includes a heating tube 1, a driving device, and a spiral propulsion rod 3. The first end of the spiral propulsion rod 3 is connected to the driving device, and the second end of the spiral propulsion rod 3 extends into the interior of the heating tube 1 for rotation relative to the heating tube 1. An electromagnetic induction coil 4 is provided outside the heating tube 1 for heating the interior of the heating tube 1.

[0027] The heating element 1 is a high-temperature electromagnetic induction heat-conducting cylinder, which can be round or square. The spiral propulsion rod 3 is made of high-temperature and corrosion-resistant material. An electromagnetic induction heating coil is wound around the heating element 1, and the cylinder is heated by opening the electromagnetic induction heating cabinet. Inside the cylinder, a high-temperature resistant spiral propulsion rod is equipped with spiral blades 15, which can rotate and propel various oxide minerals and non-metallic materials forward within the cylinder to react and form elemental products under specific high-temperature conditions.

[0028] This utility model discloses a spiral-propelled electromagnetic induction heating furnace, comprising a heating tube 1, a driving device, and a spiral propulsion rod 3. The spiral propulsion rod 3 is connected to the driving device. By rotating within the heating tube 1, the metal oxide to be reduced continuously advances during the heating process. An electromagnetic induction coil 4 heats the interior of the heating tube 1, thus achieving continuous heating and reduction. This design not only improves heating efficiency but also makes the reduction reaction more uniform, improving product quality. Furthermore, the use of electromagnetic induction heating allows for rapid heating and cooling, further saving energy. In addition, by setting electromagnetic induction heating chambers at different temperatures, the temperature and time of the reduction reaction can be controlled in stages, better meeting production needs.

[0029] In this embodiment, the heating tube 1, the driving device, and the spiral propulsion rod 3 form a set of electromagnetic induction heating chambers; the spiral propulsion electromagnetic induction heating furnace includes several sets of electromagnetic induction heating chambers. By setting several sets of electromagnetic induction heating chambers, this invention can be used for high-temperature roasting and reduction reactions of metallic and non-metallic materials at different temperatures and heating times.

[0030] In this embodiment, the spiral propulsion electromagnetic induction heating furnace includes a low-temperature electromagnetic induction heating chamber 5, a medium-temperature electromagnetic induction heating chamber 6, and a high-temperature electromagnetic induction heating chamber 7. The low-temperature electromagnetic induction heating chamber 5, the medium-temperature electromagnetic induction heating chamber 6, and the high-temperature electromagnetic induction heating chamber 7 are used for different stages of the heating and reduction reaction, respectively. Precise temperature and time control can be achieved based on the reduction characteristics of different metal oxides, thereby optimizing reduction efficiency and improving product quality.

[0031] In this embodiment, at least one set of electromagnetic induction heating chambers is provided for each of the low-temperature electromagnetic induction heating chamber 5, the medium-temperature electromagnetic induction heating chamber 6, and the high-temperature electromagnetic induction heating chamber 7. This design not only improves the flexibility of the heating furnace, enabling it to adapt to production needs of different scales, but also ensures the continuity and stability of the heating and reduction process.

[0032] In this embodiment, the heating tube 1 is provided with an inlet 8 and an outlet 9. The outlet 9 of the low-temperature electromagnetic induction heating chamber 5 is connected to the inlet 8 of the medium-temperature electromagnetic induction heating chamber 6, and the outlet 9 of the medium-temperature electromagnetic induction heating chamber 6 is connected to the inlet 8 of the high-temperature electromagnetic induction heating chamber 7. The heating tube 1 is provided with a temperature-controlled exhaust hole 14 directly opposite the outlet 9. The spiral propeller 3 rotates and pushes the material from the inlet 8 to the outlet 9, entering the next electromagnetic induction heating chamber. This design allows the metal oxide to be reduced to flow continuously between different electromagnetic induction heating chambers, thereby achieving continuous heating and reduction, greatly improving production efficiency.

[0033] In this embodiment, the driving device includes an electric motor 2 and an electric gearbox 10. The electric motor 2 is connected to the electric gearbox 10, and the electric gearbox 10 is connected to the helical propeller 3. Driven by the electric motor 2 and the electric gearbox 10, the helical propeller 3 can rotate inside the heating tube 1, thereby propelling the metal oxide to be reduced forward. This design is not only simple in structure and easy to maintain, but also provides a stable driving force, ensuring the continuity and stability of the heating reduction process.

[0034] In this embodiment, the helical propeller 3 and the heating element 1 are connected by a bearing 11. This design not only reduces the friction between the helical propeller 3 and the heating element 1, extending the service life of the equipment, but also ensures the stability and reliability of the helical propeller 3 during rotation.

[0035] In this embodiment, the heating tube 1 is covered with an electromagnetically conductive ceramic tube 16, and the electromagnetically conductive ceramic tube 16 is covered with high-temperature resistant insulation cotton 12. The electromagnetic induction coil 4 is wound around the high-temperature resistant insulation cotton 12. This design not only improves the heat preservation performance of the heating furnace and reduces heat loss, but also protects the electromagnetic induction coil 4 and extends its service life.

[0036] In this embodiment, an electromagnetic induction cabinet 13 is also included, which is used to connect to the electromagnetic induction coil 4. The electromagnetic induction cabinet 13 can control the energization and de-energization of the electromagnetic induction coil 4, thereby controlling the heating and stopping of the heating furnace. This design not only improves the automation level of the heating furnace and reduces the difficulty of operation, but also ensures the accuracy and stability of the heating process.

[0037] This utility model's spiral electromagnetic induction heating furnace can be used for preheating and reducing various oxide minerals and for high-temperature roasting and reduction of various metallic and non-metallic materials, and has the following characteristics:

[0038] 1. The spiral electromagnetic induction heating furnace can reduce metallurgical oxide minerals by stacking the reaction time of the oxide materials. It uses a spiral propulsion method to dry the mixture at low temperature in the upper section. The moisture in the mixture falls from the lower outlet of the upper section into the middle section of the medium temperature reaction section for spiral propulsion reaction. Then, it falls from the lower outlet of the medium temperature reaction section into the high temperature reaction section. The product is then pushed out from the lower outlet of the high temperature reaction section.

[0039] 2. The spiral electromagnetic induction heating furnace includes a low-temperature preheating section, a medium-temperature reaction section, and a high-temperature reaction section. Preheating and drying are performed according to the moisture content of the material. The temperature of the preheating section can be freely adjusted. If the preheating reaction time is insufficient, an additional low-temperature electromagnetic induction heating chamber 5 can be added. If the material reaction time in the medium-temperature reaction section is insufficient, an additional medium-temperature electromagnetic induction heating chamber 6 can be added. If the material reaction time in the high-temperature reaction section is insufficient, an additional high-temperature electromagnetic induction heating chamber 7 can be added. Electromagnetic induction heating chambers can be added indefinitely according to the reaction temperature of each section of the heated material until the high-temperature reaction is complete. This solves the problem that existing spiral propulsion systems can only transport materials and cannot react them during transport.

[0040] It should be noted that this application is not limited to the above-described embodiments. The above embodiments are merely examples, and any embodiments with the same structure and effect as the technical concept within the scope of this application are included in the technical scope of this application. Furthermore, various modifications that can be conceived by those skilled in the art to the embodiments, and other ways of constructing by combining some of the constituent elements of the embodiments, without departing from the spirit of this application, are also included in the scope of this application.

Claims

1. A spiral propulsion electromagnetic induction heating furnace, characterized in that, It includes a heating tube (1), a driving device and a spiral propulsion rod (3). The first end of the spiral propulsion rod (3) is connected to the driving device, and the second end of the spiral propulsion rod (3) extends into the interior of the heating tube (1) for rotation relative to the heating tube (1). An electromagnetic induction coil (4) is provided outside the heating tube (1) for heating the interior of the heating tube (1).

2. The spiral propulsion electromagnetic induction heating furnace according to claim 1, characterized in that, The heating tube (1), the driving device and the spiral propulsion rod (3) form a set of electromagnetic induction heating chambers; the spiral propulsion electromagnetic induction heating furnace includes several sets of electromagnetic induction heating chambers.

3. The spiral propulsion electromagnetic induction heating furnace according to claim 2, characterized in that, The spiral propulsion electromagnetic induction heating furnace includes a low-temperature electromagnetic induction heating chamber (5), a medium-temperature electromagnetic induction heating chamber (6), and a high-temperature electromagnetic induction heating chamber (7).

4. The spiral propulsion electromagnetic induction heating furnace according to claim 3, characterized in that, Each of the low-temperature electromagnetic induction heating chamber (5), the medium-temperature electromagnetic induction heating chamber (6), and the high-temperature electromagnetic induction heating chamber (7) shall be provided with at least one set of electromagnetic induction heating chambers.

5. The spiral propulsion electromagnetic induction heating furnace according to claim 3, characterized in that, The heating element (1) is provided with an inlet (8) and an outlet (9). The outlet (9) of the low-temperature electromagnetic induction heating chamber (5) is connected to the inlet (8) of the medium-temperature electromagnetic induction heating chamber (6), and the outlet (9) of the medium-temperature electromagnetic induction heating chamber (6) is connected to the inlet (8) of the high-temperature electromagnetic induction heating chamber (7); and / or The heating tube (1) is provided with a temperature control exhaust hole (14) that is directly opposite the discharge port (9).

6. The spiral propulsion electromagnetic induction heating furnace according to claim 1, characterized in that, The drive unit includes an electric motor (2) and an electric gearbox (10), wherein the electric motor (2) is connected to the electric gearbox (10), and the electric gearbox (10) is connected to the helical propeller (3).

7. The spiral propulsion electromagnetic induction heating furnace according to claim 1, characterized in that, The spiral propeller (3) is connected to the heating tube (1) via a bearing (11).

8. The spiral propulsion electromagnetic induction heating furnace according to claim 1, characterized in that, The heating tube (1) is provided with an electromagnetic thermally conductive ceramic tube (16) on its outer side, and the electromagnetic induction coil (4) is wound around the electromagnetic thermally conductive ceramic tube (16).

9. The spiral propulsion electromagnetic induction heating furnace according to claim 8, characterized in that, The electromagnetic thermally conductive ceramic tube (16) is covered with high-temperature resistant heat insulation cotton (12) on the outside, and the electromagnetic induction coil (4) is wound on the high-temperature resistant heat insulation cotton (12).

10. The spiral propulsion electromagnetic induction heating furnace according to claim 1, characterized in that, It also includes an electromagnetic induction cabinet (13) for connecting to the electromagnetic induction coil (4).

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