Metal smelting furnace

Abstract

The utility model relates to the technical field of metal smelting, and provides a metal smelting furnace which comprises a smelting furnace body and a circulating flue. A furnace cavity is formed in the smelting furnace body, a smoke outlet is formed in the top of the furnace cavity, a positioning frame is erected at the bottom of the furnace cavity, a smoke outlet is formed in the positioning frame, and a feeding assembly is installed at the top of the positioning frame. The circulating flue comprises an air draft structure, a smoke exhaust pipe, a connecting pipe and a smoke outlet pipe, the air draft structure is fixed to the smelting furnace body, an air draft fan is arranged in the air draft structure, the air draft structure is arranged between the smoke exhaust pipe and one end of the connecting pipe, the smoke exhaust pipe extends and is inserted into the smoke outlet, a heat insulation gap is formed in the connecting pipe, the other end of the connecting pipe communicates with the smoke outlet pipe, and the heat insulation gap is communicated with the smoke outlet pipe. The smoke outlet pipe extends and is inserted into the smoke outlet; the smelting furnace solves the problem that smoke dust and waste gas generated by an existing smelting furnace pollute the environment, and has the advantages of being simple in structure and low in manufacturing cost.

Description

Technical Field

[0001] This utility model relates to the field of metal smelting technology, and more specifically, to a metal smelting furnace. Background Technology

[0002] A smelting furnace is a device that melts metal ingots and some scrap metal, adds necessary alloying components, and then smelts them into the desired alloy through operations such as slag removal and refining. Metal smelting furnaces are key equipment in metallurgy, machinery manufacturing, and other fields, and their performance directly affects smelting efficiency, energy consumption, and the quality of metal products. In the prior art, such as the metal smelting furnace disclosed in publication number CN207865960U, the furnace includes: a furnace body with an installation port on its surface, a combustion device installed inside the furnace body, two circular holes on the installation port of the furnace body, a motor installed in one of the circular holes, and a control module installed on the motor; and an inner liner installed on the upper surface of the furnace body, located at the top of the combustion device, with short rods symmetrically installed at both ends of the inner liner, the two short rods being inserted into the two circular holes respectively, and the short rods being connected to the motor. Although the aforementioned smelting furnace operates by heating and shaking simultaneously, which makes the material heat more evenly and greatly improves processing efficiency, it generates a lot of smoke and waste gas during the smelting process. Furthermore, the furnace is not good at absorbing this smoke and waste gas, which not only pollutes the environment but also harms the health of workers. Utility Model Content

[0003] Therefore, in order to solve the problem of environmental pollution caused by smoke and exhaust gas generated by existing smelting furnaces, this utility model provides a metal smelting furnace, the specific technical solution of which is as follows:

[0004] A metal smelting furnace includes a furnace body and a circulating flue. A furnace cavity is formed within the furnace body, with a flue outlet at the top and a positioning frame at the bottom. A flue outlet is formed on the positioning frame, and a feeding assembly is installed on the top of the positioning frame. The circulating flue includes an exhaust structure, a flue pipe, a connecting pipe, and a flue outlet pipe. The exhaust structure is fixed to the furnace body and contains an exhaust fan. The exhaust structure is positioned between one end of the flue pipe and one end of the connecting pipe. The flue pipe extends and is inserted into the flue outlet. A heat insulation gap is formed within the connecting pipe, and the other end of the connecting pipe communicates with the flue outlet pipe, which extends and is inserted into the flue outlet pipe.

[0005] The aforementioned metal smelting furnace, with its upper and lower exhaust and outlet ports, facilitates the entry, exit, and circulation of smoke and waste gas within the furnace cavity, reducing the average temperature and radiative heat transfer. The addition of a feeding assembly facilitates the loading and unloading of the metal to be smelted. The ventilation structure generates negative pressure to extract smoke and waste gas generated inside the furnace cavity, removing those accumulated at the top and controlling the internal pressure. The positioning frame facilitates the installation of the feeding assembly and the placement of the exhaust port, allowing the extracted smoke and waste gas to re-enter the furnace cavity from the bottom after traveling a certain path, thus solving the environmental pollution problem caused by smoke and waste gas from existing smelting furnaces.

[0006] Furthermore, the smelting furnace body includes a furnace body and a furnace door, the furnace cavity is formed inside the furnace body, a combustion device is installed between the furnace body and the furnace cavity, a feed inlet communicating with the furnace cavity is opened on one side of the furnace body, and the furnace door is hinged to the furnace body and used to seal the feed inlet.

[0007] Furthermore, a locking block is protruding on the furnace door, and a locking groove is formed on the locking block. A snap-fit ​​component is provided on the furnace body. The snap-fit ​​component includes a snap-fit ​​rod, a handle, and a rotating shaft that is rotatably assembled on the outer wall of the furnace body. One end of the snap-fit ​​rod is fixedly connected to the handle, and the other end of the snap-fit ​​rod is integrally formed with the rotating shaft. The snap-fit ​​rod is adapted to the locking groove.

[0008] Furthermore, the furnace cavity includes a melting chamber and an installation chamber arranged vertically, the positioning frame is mounted in the installation chamber, the flue pipe is fixed inside the positioning frame and extends to communicate with the flue outlet, and the feeding assembly is located in the melting chamber and is fixedly installed on the top of the positioning frame.

[0009] Furthermore, the feeding assembly includes a support frame, a swing table, and a limiting ring. The support frame is fixedly installed on the top of the positioning frame. The swing table is rotatably mounted on the support frame. The swing table has a placement groove for placing the metal to be melted. One end of the placement groove has an opening, and both sides of the opening have insertion blocks. The two ends of the limiting ring are slidably inserted into the insertion blocks on both sides.

[0010] Furthermore, the swing platform is provided with a swing handle; the top of the limiting turn is provided with a lifting handle.

[0011] Furthermore, the exhaust structure includes a cover and an exhaust fan installed inside the cover. The cover is detachably fixed to the top of the furnace body. An air inlet and an air outlet are respectively provided at the upper and lower ends of the cover. The air inlet is connected to the flue pipe, and the air outlet is connected to the connecting pipe.

[0012] Furthermore, the connecting pipe includes an inner cylinder and an outer cylinder coaxially disposed on the outer surface of the inner cylinder, the heat insulation gap is formed between the inner cylinder and the outer cylinder, and the outer wall of the inner cylinder and the inner wall of the outer cylinder are both covered with heat insulation layers.

[0013] Furthermore, the insulation layer is made of rubber and plastic insulation material.

[0014] Furthermore, the connecting pipe includes a first connecting pipe and a plurality of second connecting pipes. One end of the first connecting pipe is connected to the air outlet, and the other end of the first connecting pipe is connected to a plurality of second connecting pipes respectively. The second connecting pipes extend to connect with the smoke outlet pipe. The number of smoke outlet pipes corresponds one-to-one with the number of second connecting pipes. Each of the second connecting pipes is equipped with a control valve. Attached Figure Description

[0015] Figure 1 This is one of the structural schematic diagrams of a metal smelting furnace according to an embodiment of the present invention;

[0016] Figure 2 This is a second schematic diagram of the structure of the metal smelting furnace according to an embodiment of the present invention;

[0017] Figure 3 This is a cross-sectional view of the connecting pipe of the metal smelting furnace according to an embodiment of the present invention;

[0018] Figure 4 This is a schematic diagram of the structure of the placement component of the metal smelting furnace according to an embodiment of the present invention.

[0019] Explanation of reference numerals in the attached figures:

[0020] 1. Smelting furnace body; 11. Furnace body; 111. Furnace cavity; 112. Snap-fit ​​component; 12. Furnace door; 121. Locking block; 2. Circulating flue; 21. Exhaust structure; 22. Connecting pipe; 221. Inner cylinder; 222. Outer cylinder; 223. Insulation gap; 224. Insulation layer; 23. Exhaust pipe; 3. Positioning frame; 4. Feeding assembly; 41. Support frame; 42. Swinging table; 421. Placement slot; 422. Swing handle; 43. Limiting ring; 431. Lifting handle; 5. Control valve. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with its embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and do not limit its scope of protection.

[0022] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0024] In this utility model, "first" and "second" do not represent a specific quantity or order, but are merely used to distinguish names.

[0025] like Figures 1-3 As shown, a metal smelting furnace according to one embodiment of the present invention includes a smelting furnace body 1 and a circulating flue 2; a furnace cavity 111 is formed inside the smelting furnace body 1, a flue gas outlet is provided at the top of the furnace cavity 111, a positioning frame 3 is provided at the bottom of the furnace cavity 111, a flue gas outlet is provided on the positioning frame 3, and a feeding component 4 is installed on the top of the positioning frame 3; the circulating flue 2 includes an exhaust structure 21, a flue gas pipe, a connecting pipe 22 and a flue gas outlet pipe 23, the exhaust structure 21 is fixed on the smelting furnace body 1, an exhaust fan is provided inside the exhaust structure 21, the exhaust structure 21 is located between one end of the flue gas pipe and the connecting pipe 22, the flue gas pipe extends and is inserted into the flue gas outlet, a heat insulation gap 223 is formed inside the connecting pipe 22, the other end of the connecting pipe 22 is connected to the flue gas outlet pipe 23, and the flue gas outlet pipe 23 extends and is inserted into the flue gas outlet.

[0026] The aforementioned metal smelting furnace, with its upper and lower exhaust and outlet ports, facilitates the entry, exit, and circulation of smoke and waste gas within the furnace cavity 111, reducing the average temperature and radiative heat transfer within the furnace cavity 111. The feeding assembly 4 facilitates the loading and unloading of the metal to be smelted. The exhaust structure 21 generates negative pressure to extract smoke and waste gas generated inside the furnace cavity 111, removing smoke and waste gas accumulated in the top area of ​​the furnace cavity 111 and controlling the internal air pressure. The positioning frame 3 facilitates the installation of the feeding assembly 4 and the placement of the exhaust port, allowing the extracted smoke and waste gas to re-enter the furnace cavity 111 from the bottom after traveling a certain path, thus solving the problem of environmental pollution caused by smoke and waste gas generated by existing smelting furnaces.

[0027] like Figure 1 and Figure 2 As shown, in one embodiment, the smelting furnace body 1 includes a furnace body 11 and a furnace door 12. A furnace cavity 111 is formed inside the furnace body 11. A combustion device is installed between the furnace body 11 and the furnace cavity 111. A feed inlet communicating with the furnace cavity 111 is opened on one side of the furnace body 11. The furnace door 12 is hinged to the furnace body 11 and used to seal the feed inlet. This can prevent heat loss and improve the thermal efficiency of the boiler. The sealing performance of the furnace door 12 has an important impact on the combustion process.

[0028] like Figure 1 and Figure 2 As shown, in one embodiment, a locking block 121 protrudes from the furnace door 12, and a locking groove is formed on the locking block 121. A snap-fit ​​component 112 is provided on the furnace body 11. The snap-fit ​​component 112 includes a snap-fit ​​rod, a handle, and a rotating shaft that is rotatably mounted on the outer wall of the furnace body 11. One end of the snap-fit ​​rod is fixedly connected to the handle, and the other end of the snap-fit ​​rod is integrally formed with the rotating shaft. The snap-fit ​​rod is adapted to the locking groove. Locking the furnace door 12 can effectively prevent the furnace door 12 from being accidentally opened during the operation of the smelting furnace, and can also prevent the smelting furnace from operating in an unsafe state, avoiding injury or accidents caused by accidental start-up or improper operation of the smelting furnace.

[0029] In one embodiment, the furnace cavity 111 includes a melting chamber and an installation chamber arranged vertically. The positioning frame 3 is mounted in the installation chamber. The flue pipe 23 is fixed inside the positioning frame 3 and extends to communicate with the flue outlet. The feeding assembly 4 is located in the melting chamber and is fixedly installed on the top of the positioning frame 3.

[0030] like Figure 2 and Figure 4 As shown, in one embodiment, the feeding assembly 4 includes a support frame 41, a swing table 42, and a limiting ring 43. The support frame 41 is fixedly installed on the top of the positioning frame 3. The swing table 42 is rotatably mounted on the support frame 41. The swing table 42 has a placement groove 421 for placing the metal to be melted. One end of the placement groove 421 has an opening, and there are insertion blocks on both sides of the opening. The two ends of the limiting ring 43 are slidably inserted into the insertion blocks on both sides. The sliding of the limiting ring 43 on the insertion blocks allows it to move up and down, thereby enabling the opening of the placement groove 421 to open and close repeatedly, facilitating the feeding operation of the metal to be melted.

[0031] like Figure 4 As shown, in one embodiment, the swing table 42 is provided with a swing handle 422; the top of the limiting ring 43 is provided with a lifting handle 431.

[0032] In one embodiment, the exhaust structure 21 includes a cover and an exhaust fan installed inside the cover. The cover is detachably fixed to the top of the furnace body 11. An air inlet and an air outlet are respectively provided at the upper and lower ends of the cover. The air inlet is connected to the flue pipe, and the air outlet is connected to the connecting pipe 22.

[0033] like Figure 3 As shown, in one embodiment, the connecting pipe 22 includes an inner cylinder 221 and an outer cylinder 222 coaxially disposed on the outer surface of the inner cylinder 221. A heat insulation gap 223 is formed between the inner cylinder 221 and the outer cylinder 222. A heat insulation layer 224 is laid on the outer wall of the inner cylinder 221 and the inner wall of the outer cylinder 222.

[0034] Preferably, the insulation layer 224 is made of rubber and plastic insulation material. The insulation layer 224 can reduce the temperature of the part of the connecting pipe 22 that comes into contact with the outside environment, thereby avoiding burns caused by high temperature and the combustion of adjacent flammable materials, and reducing safety hazards.

[0035] In one embodiment, the connecting pipe 22 includes a first connecting pipe and a plurality of second connecting pipes. One end of the first connecting pipe is connected to the gas outlet, and the other end of the first connecting pipe is connected to a plurality of second connecting pipes. The second connecting pipes extend to connect with the smoke outlet pipe 23, and the number of smoke outlet pipes 23 corresponds one-to-one with the number of second connecting pipes. Each second connecting pipe is equipped with a control valve 5. The control valve 5 precisely controls the proportion of recirculated flue gas, thereby achieving fine adjustment of the smelting process, reducing the risk of flameout, and improving combustion stability.

[0036] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0037] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A metal smelting furnace, characterized in that include: The furnace body has a furnace cavity formed inside it. A flue gas outlet is provided at the top of the furnace cavity. A positioning frame is provided at the bottom of the furnace cavity. A flue gas outlet is provided on the positioning frame. A feeding assembly is installed on the top of the positioning frame. The circulating flue includes an exhaust structure, an exhaust pipe, a connecting pipe, and an outlet pipe. The exhaust structure is fixed to the smelting furnace body and contains an exhaust fan. The exhaust structure is located between one end of the exhaust pipe and one end of the connecting pipe. The exhaust pipe extends and is inserted into the exhaust port. A heat insulation gap is formed inside the connecting pipe. The other end of the connecting pipe is connected to the outlet pipe, which extends and is inserted into the outlet.

2. The metal smelting furnace according to claim 1, characterized in that, The smelting furnace body includes a furnace body and a furnace door. The furnace cavity is formed inside the furnace body. A combustion device is installed between the furnace body and the furnace cavity. A feed inlet communicating with the furnace cavity is opened on one side of the furnace body. The furnace door is hinged to the furnace body and is used to seal the feed inlet.

3. The metal smelting furnace according to claim 2, characterized in that, The furnace door is provided with a locking block, and the locking block is provided with a locking groove. The furnace body is provided with a snap-fit ​​component, which includes a snap-fit ​​rod, a handle, and a rotating shaft that is rotatably mounted on the outer wall of the furnace body. One end of the snap-fit ​​rod is fixedly connected to the handle, and the other end of the snap-fit ​​rod is integrally formed with the rotating shaft. The snap-fit ​​rod is adapted to the locking groove.

4. The metal smelting furnace according to claim 1, characterized in that, The furnace cavity includes a melting chamber and an installation chamber arranged vertically. The positioning frame is mounted in the installation chamber. The flue pipe is fixed inside the positioning frame and extends to communicate with the flue outlet. The feeding assembly is located in the melting chamber and is fixedly installed on the top of the positioning frame.

5. The metal smelting furnace according to claim 4, characterized in that, The feeding assembly includes a support frame, a swing table, and a limiting ring. The support frame is fixedly installed on the top of the positioning frame. The swing table is rotatably mounted on the support frame. The swing table has a placement groove for placing the metal to be melted. One end of the placement groove has an opening, and there are insertion blocks on both sides of the opening. The two ends of the limiting ring are slidably inserted into the insertion blocks on both sides.

6. The metal smelting furnace according to claim 5, characterized in that, The swing platform is equipped with a swing handle; the top of the limiting turnout is equipped with a lifting handle.

7. The metal smelting furnace according to claim 2, characterized in that, The exhaust structure includes a cover and an exhaust fan installed inside the cover. The cover is detachably fixed to the top of the furnace body. An air inlet and an air outlet are respectively provided at the upper and lower ends of the cover. The air inlet is connected to the flue pipe, and the air outlet is connected to the connecting pipe.

8. The metal smelting furnace according to claim 1, characterized in that, The connecting pipe includes an inner cylinder and an outer cylinder coaxially disposed on the outer surface of the inner cylinder. The heat insulation gap is formed between the inner cylinder and the outer cylinder. Both the outer wall of the inner cylinder and the inner wall of the outer cylinder are covered with heat insulation layers.

9. The metal smelting furnace according to claim 8, characterized in that, The insulation layer is made of rubber and plastic insulation material.

10. The metal smelting furnace according to claim 7, characterized in that, The connecting pipe includes a first connecting pipe and a plurality of second connecting pipes. One end of the first connecting pipe is connected to the air outlet, and the other end of the first connecting pipe is connected to a plurality of second connecting pipes. The second connecting pipes extend to connect with the smoke outlet pipe. The number of smoke outlet pipes corresponds one-to-one with the number of second connecting pipes. Each of the second connecting pipes is equipped with a control valve.

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