A preheating and drying integrated smelting device and method for electric smelting of magnesium

Abstract

The application relates to the technical field of smelting devices, in particular to a preheating and drying integrated smelting device and method for electric smelting of magnesium, which comprises an electric arc furnace and a pipeline installed on the electric arc furnace, and further comprises: a base fixed to the surface of one side of the electric arc furnace; a discharging group installed on the base; a processing group installed on the discharging group; and an air guide group arranged in the processing group and comprising an air pipe and a storage rack fixed to the surface of the air pipe; the application directly transfers the heat of flue gas to the material through the air guide group, can preheat the material, effectively improves the initial temperature of the material, reduces the temperature difference between the inside and outside of the material, thereby speeds up the subsequent smelting speed, in the process, the excess moisture in the material can be evaporated through preheating, the material dryness is improved, so that the subsequent smelting reaction can be stably carried out, and the problem that the temperature difference between the inside and outside of the material is large when the electric arc furnace is used at present, and the smelting operation efficiency is easily affected is solved.

Description

Technical Field

[0001] This invention relates to the field of smelting equipment technology, specifically to an integrated preheating and drying smelting equipment and method for smelting fused magnesium. Background Technology

[0002] Fused magnesium is made from carefully selected natural magnesite or high-purity light-burned magnesium particles. It is smelted in an electric arc furnace until it reaches a molten state, and then cooled and crystallized. After cooling and crystallization, it is made into refractory raw materials used in industries such as steel, cement, and glass.

[0003] Currently, in some electric arc furnaces, when materials are put into the furnace, the outer layer of the material is directly heated, and the heat is transferred from the outer layer to the inner layer step by step. Therefore, it takes a long time to achieve overall melting, which can easily affect the overall melting efficiency. In addition, the high-temperature flue gas generated during the melting process releases its internal heat directly into the external environment, which not only wastes energy but also easily causes thermal pollution to the surrounding environment. Summary of the Invention

[0004] The purpose of this invention is to provide an integrated preheating and drying smelting device for fused magnesium smelting. This device directly transfers the heat from the flue gas to the material through a guide air assembly, preheating the material and effectively increasing its initial temperature. This reduces the temperature difference between the inside and outside of the material, thereby accelerating the subsequent smelting process. During this process, preheating evaporates excess moisture from the material, increasing its dryness and ensuring a stable smelting reaction. This invention solves the problem that in some electric arc furnaces, the large temperature difference between the inside and outside of the material can negatively impact smelting efficiency.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an integrated preheating and drying smelting apparatus for fused magnesium, comprising an electric arc furnace and pipes installed on the electric arc furnace, and further comprising: The base is fixed to the surface of one side of the electric arc furnace; The material feeding assembly is installed on the base. The processing unit is installed on the unloading unit; An air guide assembly is installed in the processing group. The air guide assembly includes an air duct and a shelf fixed to the surface of the air duct. The air duct and the shelf are connected. The smoke extraction unit is installed on the treatment unit; A movable assembly is mounted on an air guide assembly, the movable assembly including a connecting part disposed on the air guide assembly and an extension part mounted on the connecting part.

[0006] Preferably, the feeding group includes: Hollow frame, fixed to the top of the base; The baffle is bolted to the surface of the hollow frame; An L-shaped plate is fixed to the surface of the baffle, and the surface of the L-shaped plate is in contact with the inner wall of the hollow frame.

[0007] Preferably, the processing group includes: A material collection frame is fixed to the top of a hollow frame, and the material collection frame is connected to the hollow frame; The feed hopper is fixed to the surface of the collection frame; Top plate, fixed to the top of the aggregate frame; The cover plate is bolted to the top of the feed hopper.

[0008] Preferably, the bottom of the shelf has a through hole, the shelf has a spiral hollow design, the air duct is fixed inside the material collection frame, and one end of the pipe is fixed through the material collection frame and connected to the air duct.

[0009] Preferably, the smoke exhaust system includes: The packaging frame is fixed to the top of the top plate; The smoke outlet pipe is connected to the top of the straight pipe; A straight pipe is connected between the top plate and the enclosure frame, and the straight pipe is coaxially arranged with the air duct.

[0010] Preferably, the connecting portion includes: A smooth rod slides through the air duct, the smooth rod sliding through the bottom and top of the enclosure frame; A perforated plate is fixed to the top of the light rod, and the bottom of the perforated plate is attached to the bottom of the inner wall of the wrapping frame; A limiting plate is fixed to the surface of the light rod, and the limiting plate is slidably connected to the surface of the straight tube.

[0011] Preferably, a guide is fixed to the inner wall of the package frame, and the guide slides through the perforated plate.

[0012] Preferably, the extension includes: The positioning block is fixed to the surface of the guide rod; The crossbar is fixed to the surface of the positioning block; The pivot is rotatably connected to the surface of the crossbar.

[0013] Preferably, a lifting plate is fixed to the bottom of the light rod, the lifting plate is set at the bottom of the air duct, and a blocking block is fixed to the top of the lifting plate, the outer diameter of the blocking block being equal to the inner diameter of the air duct.

[0014] The preheating and drying integrated smelting method for fused magnesium using the aforementioned apparatus is as follows: S1: The flue gas generated by electric arc furnace smelting is injected into the air duct through a pipeline; S2: The material is fed into the collection frame through the feed hopper, and the storage rack supports the material; S3: The flue gas is discharged through the bottom of the air duct and the through hole, and preheats and dries the material; S4: The flue gas enters the packaging frame, and the connecting part is lifted as a whole by the extension part due to the air pressure. The material moves under the force, and the lifting plate and the block seal the bottom of the air duct. The flue gas continues to be blown directly onto the material through the through hole.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention discharges flue gas from the pipeline through a guide fan assembly, and the heat from the flue gas is directly transferred to the material through the guide fan assembly. This preheating process effectively increases the initial temperature of the material, reduces the temperature difference between the inside and outside of the material, thereby accelerating the subsequent melting speed and improving the efficiency of the melting operation. In this process, preheating can evaporate excess moisture in the material, increasing the dryness of the material so that the subsequent melting reaction can proceed stably. This solves the problem that in some electric arc furnaces, the large temperature difference between the inside and outside of the material can easily affect the efficiency of the melting operation. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional structural diagram of the electric arc furnace, pipes, and base in this invention; Figure 3 This is a three-dimensional structural diagram of the material collection frame cut open according to the present invention; Figure 4 This is a three-dimensional structural diagram of the present invention with the hollow frame and feed hopper cut open and the baffle and L-shaped plate removed; Figure 5 This is a three-dimensional structural diagram of the air guiding group, smoke exhaust group, and moving group in this invention; Figure 6 This is a three-dimensional structural diagram of the invention, showing the air duct, shelf, and packaging frame cut apart. Figure 7 This is a three-dimensional structural diagram of the present invention, showing the material collection frame, the feed hopper, and the packaging frame cut open and the partial extensions disassembled.

[0017] In the diagram: 100, electric arc furnace; 200, pipe; 300, base; 400, feeding assembly; 410, hollow frame; 420, baffle; 430, L-shaped plate; 500, processing assembly; 510, collecting frame; 520, feeding hopper; 530, top plate; 600, air guide assembly; 610, air duct; 620, shelf; 630, through hole; 700, smoke exhaust assembly; 710, wrapping frame; 720, straight pipe; 730, smoke outlet pipe; 800, moving assembly; 810, connecting part; 811, smooth rod; 812, hollow plate; 813, limiting plate; 814, guide component; 820, extension part; 821, positioning block; 822, cross frame; 823, rotating shaft; 830, lifting plate; 840, blocking block. Detailed Implementation

[0018] 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.

[0019] Please see Figures 1-7An integrated preheating and drying smelting apparatus for fused magnesium includes an electric arc furnace 100 and a flue 200 for exhausting smoke. The flue 200 is installed on the electric arc furnace 100. A base 300 is fixed to one side of the electric arc furnace 100, and a feeding assembly 400 is installed on the base 300. The feeding assembly 400 includes a hollow frame 410 fixed to the top of the base 300, a baffle 420 bolted to the surface of the hollow frame 410, and an L-shaped plate 430 fixed to the surface of the baffle 420. The surface of the L-shaped plate 430 fits against the inner wall of the hollow frame 410. When the operator installs the baffle 420 on the surface of the hollow frame 410, the L-shaped plate 430 can block the upper part of the inner wall of the hollow frame 410. The processing unit 500 includes a collection frame 510 fixed to the top of the hollow frame 410, a feed hopper 520 fixed to the surface of the collection frame 510, and a top plate 530 fixed to the top of the collection frame 510. A cover plate is bolted to the top of the feed hopper 520. The collection frame 510 is connected to the hollow frame 410. Material enters the interior of the collection frame 510 through the feed hopper 520 for preheating and drying. At this time, the cover plate seals the feed hopper 520, the baffle 420 is removed, and the L-shaped plate 430 is moved out, allowing the material in the collection frame 510 to fall into the hollow frame 410 for workers to remove and input into the electric arc furnace 100 for smelting. The processing unit 500 is equipped with a guide air group 6. 00, the air guide assembly 600 includes an air duct 610 fixed inside the collection frame 510, a shelf 620 fixed to the surface of the air duct 610, and a through hole 630 at the bottom of the shelf 620. The shelf 620 has a spiral hollow design. The air duct 610 is connected to the shelf 620. One end of the pipe 200 is fixedly inserted through the collection frame 510 and connected to the air duct 610. The flue gas generated during melting is injected into the air duct 610 through the pipe 200. The flue gas enters the pipe 200, and the heat is transferred to the shelf 620. The material enters the collection frame 510, and the shelf 620 can support the material. At this time, the heat is transferred from the shelf 620 to the material to preheat the material. At the same time, the flue gas passes through the air duct 620. The flue gas is discharged through the through hole 630 and the bottom of the duct 610. After being blown downwards, it is discharged upwards. During this process, the heated flue gas flows and rises through the shelf 620 and passes between the materials to preheat them. While the materials are preheated, the internal moisture evaporates. The processing group 500 is equipped with a smoke exhaust group 700. The smoke exhaust group 700 includes a wrapping frame 710 fixed to the top of the top plate 530, a smoke outlet pipe 730 connected to the top of the straight pipe 720, and a straight pipe 720 connected between the top plate 530 and the wrapping frame 710. The straight pipe 720 is coaxially arranged with the duct 610. The flue gas is injected into the wrapping frame 710 through the straight pipe 720 and then discharged through the smoke outlet pipe 730.

[0020] The operator connects the exhaust pipe 730 to the flue gas treatment equipment, allowing the preheated flue gas to be purified and treated, thus preventing direct discharge of flue gas and its impact on environmental quality. A movable assembly 800 is installed on the air guide assembly 600. The movable assembly 800 includes a connecting part 810 and an extension part 820 installed on the connecting part 810. The connecting part 810 includes a smooth rod 811 that slides through the air duct 610. The top of the smooth rod 811 slides through the bottom of the enclosure frame 710 and through the top plate 530. A perforated plate 812 is fixed to the top of the smooth rod 811. Under gravity, the bottom of the perforated plate 812 adheres to the bottom of the inner wall of the enclosure frame 710. Plate 812 can block the straight pipe 720. After that, the flue gas can be discharged through the straight pipe 720. The perforated plate 812 can be lifted by air pressure, thereby driving the light rod 811 to be lifted by the perforated plate 812. The surface of the light rod 811 is fixed with a limit plate 813. The limit plate 813 is slidably connected to the surface of the straight pipe 720. The limit plate 813 can limit the movement range of the light rod 811. The inner wall of the wrapping frame 710 is fixed with a guide 814. The guide 814 slides through the perforated plate 812. The guide 814 can guide the movement of the perforated plate 812. The extension 820 includes a positioning block 821 fixed to the surface of the light rod 811, a crossbeam 822 fixed to the surface of the positioning block 821, and a rotating shaft 823 rotatably connected to the surface of the crossbeam 822.

[0021] When the bare rod 811 moves up and down, the extension 820 can move up and down as a whole. During this process, the extension 820 can squeeze the material to make it move, so as to adjust the state of the material and improve the preheating effect of the flue gas on the material. At the same time, the rotating shaft 823 can contact the material and rotate, thereby increasing the smoothness of the movement of the extension 820. A lifting plate 830 is fixed at the bottom of the bare rod 811. The lifting plate 830 is set at the bottom of the air duct 610. When the connecting part 810 is raised, it can pass through... The lifting plate 830 is raised by the light rod 811. The lifting plate 830 blocks the bottom of the air duct 610 so that the flue gas can be blown onto the material through the through hole 630. A blocking block 840 is fixed on the top of the lifting plate 830. The outer diameter of the blocking block 840 is equal to the inner diameter of the air duct 610. When the lifting plate 830 blocks the bottom of the air duct 610, the blocking block 840 fills the bottom of the air duct 610, which can improve the sealing effect of the bottom of the air duct 610 so that the flue gas can be discharged better through the through hole 630.

[0022] Working principle: The flue gas generated by the electric arc furnace 100 is injected into the air duct 610 through the pipe 200. The material enters the collection frame 510 through the feed hopper 520. The material moves downward inside the collection frame 510 through the shelf 620 and is laid on the shelf 620. The flue gas is discharged through the bottom of the air duct 610 and the through hole 630. The flue gas blows directly onto the material, and the heat in the flue gas preheats the material. The shelf 620 absorbs the heat in the flue gas and transfers it to the material. This improves the preheating effect on materials. When materials are heated, their internal moisture evaporates, and flue gas enters the wrapping frame 710 through the straight pipe 720. The perforated plate 812 is lifted under air pressure and the extension part 820 is lifted as a whole through the light rod 811. The extension part 820 moves up and down, causing the material to move and its state to be adjusted so that it can be better preheated by the flue gas. The flue gas is discharged through the flue pipe 730 and input into the flue gas treatment equipment for purification and discharge.

[0023] It should be noted that, in this document, relational terms such as "first" and "second" are used only 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.

[0024] 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 alterations 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 preheating and drying integrated smelting apparatus for fused magnesium smelting, comprising an electric arc furnace (100) and pipes (200) installed on the electric arc furnace (100), characterized in that, Also includes: The base (300) is fixed to the surface of one side of the electric arc furnace (100); The feeding assembly (400) is mounted on the base (300); The processing unit (500) is installed on the unloading unit (400); An air guide assembly (600) is provided in the processing assembly (500). The air guide assembly (600) includes an air duct (610) and a shelf (620) fixed on the surface of the air duct (610). The air duct (610) and the shelf (620) are connected. The smoke exhaust unit (700) is installed on the treatment unit (500); A movable assembly (800) is mounted on an air guide assembly (600). The movable assembly (800) includes a connecting portion (810) disposed on the air guide assembly (600) and an extension portion (820) mounted on the connecting portion (810).

2. The integrated preheating and drying smelting apparatus for fused magnesium smelting according to claim 1, characterized in that: The feeding assembly (400) includes: A hollow frame (410) is fixed to the top of the base (300); A baffle (420) is bolted to the surface of the hollow frame (410); An L-shaped plate (430) is fixed to the surface of a baffle (420), and the surface of the L-shaped plate (430) is in contact with the inner wall of the hollow frame (410).

3. The integrated preheating and drying smelting apparatus for fused magnesium smelting according to claim 2, characterized in that, The processing group (500) includes: A material collection frame (510) is fixed to the top of a hollow frame (410), and the material collection frame (510) is connected to the hollow frame (410); The feed hopper (520) is fixed to the surface of the collection frame (510); Top plate (530) is fixed to the top of the collection frame (510); The cover plate is bolted to the top of the feed hopper (520).

4. The integrated preheating and drying smelting apparatus for fused magnesium smelting according to claim 3, characterized in that, The bottom of the shelf (620) is provided with a through hole (630). The shelf (620) has a spiral hollow design. The air duct (610) is fixed inside the collection frame (510). One end of the pipe (200) is fixed through the collection frame (510) and connected to the air duct (610).

5. The integrated preheating and drying smelting apparatus for fused magnesium smelting according to claim 4, characterized in that, The smoke exhaust assembly (700) includes: The packaging frame (710) is fixed to the top of the top plate (530); The smoke outlet pipe (730) is connected to the top of the straight pipe (720); A straight pipe (720) is connected between the top plate (530) and the enclosure frame (710), and the straight pipe (720) is coaxially arranged with the air duct (610).

6. The integrated preheating and drying smelting apparatus for fused magnesium smelting according to claim 5, characterized in that, The connecting part (810) includes: A light rod (811) slides through a duct (610), the light rod (811) sliding through the bottom and top plate (530) of the wrapping frame (710). A perforated plate (812) is fixed to the top of the light rod (811), and the bottom of the perforated plate (812) is attached to the bottom of the inner wall of the wrapping frame (710); A limiting plate (813) is fixed on the surface of the light rod (811), and the limiting plate (813) is slidably connected to the surface of the straight tube (720).

7. The integrated preheating and drying smelting apparatus for fused magnesium smelting according to claim 6, characterized in that: The inner wall of the package frame (710) is fixed with a guide (814), which slides through the hollow plate (812).

8. The integrated preheating and drying smelting apparatus for fused magnesium smelting according to claim 7, characterized in that, The extension (820) includes: The positioning block (821) is fixed to the surface of the guide rod (811); The crossbar (822) is fixed to the surface of the positioning block (821); The pivot (823) is rotatably connected to the surface of the crossbar (822).

9. The integrated preheating and drying smelting apparatus for fused magnesium smelting according to claim 8, characterized in that: A lifting plate (830) is fixed at the bottom of the light rod (811). The lifting plate (830) is set at the bottom of the air duct (610). A block (840) is fixed at the top of the lifting plate (830). The outer diameter of the block (840) is equal to the inner diameter of the air duct (610).

10. A preheating and drying integrated smelting method for fused magnesium smelting based on the apparatus of any one of claims 1-9, characterized in that, The method is as follows: S1: The flue gas generated by the electric arc furnace (100) is injected into the air duct (610) through the pipe (200); S2: The material is fed into the collection frame (510) through the feed hopper (520), and the shelf (620) supports the material; S3: The flue gas is discharged through the bottom of the duct (610) and the through hole (630) and preheats and dries the material; S4: The flue gas enters the packaging frame (710), and the connecting part (810) is driven by the air pressure to lift the extension part (820) as a whole. The material moves under force, and the lifting plate (830) and the block (840) seal the bottom of the air duct (610). The flue gas continues to be blown directly onto the material through the through hole (630).

Images