Metal smelting device and smelting method

Abstract

The invention relates to the technical field of waste metal smelting processing, in particular to a metal smelting device and a smelting method.The metal smelting device comprises a smelting equipment body, a first feeding pipe is fixedly installed at the top of the smelting equipment body, and a smashing mechanism is arranged on the first feeding pipe; the crushing mechanism comprises a crushing box body fixedly mounted at the top of the first feeding pipe, a second feeding pipe is fixedly mounted at the top of the crushing box body, a plurality of first motors are fixedly mounted on the surface of the crushing box body, and a plurality of crushing rollers connected with the first motors are movably mounted in the crushing box body. Through the arrangement of the crushing mechanism, waste metal fragments with different sizes can be crushed for multiple times until the sizes of the waste metal fragments are approximately similar, the situation that the sizes of the metal fragments are different is prevented, the smelting efficiency of the metal fragments can be improved after the metal fragments are crushed, and the situation that metal smelting is insufficient can also be avoided.

Description

Technical Field

[0001] The invention relates to a metal smelting device, in particular to a metal smelting device and a smelting method, and belongs to the technical field of waste metal smelting and processing. Background Art

[0002] Scrap metal refers to metal fragments and scraps discarded by the metallurgical industry and metal processing industry, as well as metal objects scrapped during equipment renewal, etc. It also includes metal packaging containers and scrapped vehicles recycled from urban garbage. Scrap metal is also a resource. Countries around the world have specialized units engaged in the recycling and utilization of scrap metal business. The recycled scrap metal is mainly used for smelting and conversion into recycled metal, and some is used to produce machinery and equipment or parts, tools and civil appliances.

[0003] Melting equipment refers to the equipment that melts metal ingots and some scrap metals and adds necessary alloy components, and then melts them into the required alloy through operations such as slagging and refining. According to the heating energy, smelting equipment can be divided into two types: fuel heating type and electric heating type. The fuel heating type uses the reaction heat energy generated when the fuel is burned to heat the equipment, while the electric heating type generates heat by energizing the resistance element or passing alternating current through the coil to generate an alternating magnetic field, and uses the induction current to heat the charge in the magnetic field.

[0004] In summary, when recycling waste metals, a smelting device is usually used to smelt the metals. However, the commonly used smelting devices do not have the function of crushing metal fragments, and can only smelt metal fragments. Due to the different volumes of metal fragments, smaller metal fragments can be easily smelted, while larger metal fragments are not easy to melt. After the fragments of different volumes are mixed and smelted, the metal fragments will not be fully smelted, and the smelting efficiency will also be reduced.

[0005] Therefore, it is urgent to improve to solve the above-mentioned problems. Summary of the invention

[0006] The object of the present invention is to provide a metal smelting device and a smelting method. By setting a crushing mechanism, waste metal fragments of different volumes can be crushed multiple times until the volumes of the waste metal fragments are roughly similar, thereby preventing the metal fragments from having different sizes. After the metal fragments are crushed, their smelting efficiency can be improved, and insufficient metal smelting can be avoided.

[0007] In order to achieve the above object, the main technical solutions adopted by the present invention include:

[0008] A metal smelting device comprises a smelting equipment body, a first feed pipe is fixedly installed on the top of the smelting equipment body, a crushing mechanism is arranged on the first feed pipe, the crushing mechanism comprises a crushing box fixedly installed on the top of the first feed pipe, a second feed pipe is fixedly installed on the top of the crushing box, a plurality of first motors are fixedly installed on the surface of the crushing box, a plurality of crushing rollers connected to the first motors are movably installed inside the crushing box, a screen fixedly installed on the crushing box is arranged below the crushing roller, discharge ports opened on the crushing box are arranged on both sides of the screen, and screw feeders are fixedly installed on both sides of the crushing box.

[0009] Preferably, the shape of the screen is set to be a triangle, and a plurality of guide plates with one end inclined toward the discharge port are symmetrically installed on the screen.

[0010] Preferably, a guide frame is fixedly installed on the discharge port and the output end of the screw conveyor, and the output end of the screw conveyor is obliquely installed on the second feed pipe.

[0011] Preferably, a fixing block is arranged on the top of the second feeding pipe, a hydraulic telescopic rod is fixedly mounted on the pulverizing box, and a sealing plate connected to the fixing block is fixedly mounted on the hydraulic telescopic rod.

[0012] Preferably, a support frame is fixedly mounted on the smelting equipment body, a fan is fixedly mounted on the support frame, air ducts connected to the second feed pipe and the smelting equipment body are fixedly mounted on the top and bottom of the fan, a fixed plate is fixedly sleeved on one end of the fan, a filter box connected to the fan is arranged on the fixed plate, and a plurality of filters are fixedly mounted inside the filter box.

[0013] Preferably, support plates are fixedly mounted on both sides of the fixing plate, screw rods rotatably connected by threads are provided on the support plates, and a fixing frame is movably mounted on one end of the screw rods.

[0014] Preferably, two limiting slide rails are fixedly installed on the top of the fixed plate, and limiting blocks fixedly connected to the fixed frame are slidably installed on the limiting slide rails.

[0015] Preferably, a positioning block is fixedly mounted on the surface of the fixing plate, and a positioning plate used in conjunction with the positioning block is fixedly mounted on the top of the filter box.

[0016] Preferably, a plurality of stirring rollers are movably installed inside the smelting equipment body, and a second motor connected to the stirring rollers is fixedly installed on the surface of the smelting equipment body.

[0017] Preferably, a metal smelting device and a smelting method include the following steps:

[0018] S1. First, start the multiple first motors on the crushing box to make the first motors drive the multiple crushing rollers in the crushing box to rotate, and then put the waste metal fragments into the crushing box from the second feeding pipe. The waste metal fragments are crushed by the multiple crushing rollers to reduce their volume. The crushed metal fragments fall on the screen for screening. The qualified metal powder blocks pass through the screen and directly enter the smelting equipment through the first feeding pipe, while the unqualified metal powder blocks are screened by the screen and retained at the top:

[0019] S2, the screened metal powder blocks are discharged from the discharge port into the screw feeder, and then the screw feeder is started to feed the unqualified metal powder blocks back into the second feed pipe so that they are crushed again through multiple crushing rollers until all the metal powder blocks are crushed to the qualified state and fall into the smelting equipment body;

[0020] S3, after the waste metal powder blocks enter the smelting equipment body, the smelting equipment body is started to smelt the metal powder blocks, and then a plurality of second motors are started to drive the stirring rollers in the smelting equipment body to rotate, so that the stirring rollers stir the accumulated metal powder blocks, so that the metal powder blocks can be fully heated and smelted more fully;

[0021] S4. During the crushing and smelting process, the fan is started, and the fan extracts the dust generated by crushing in the crushing box and the waste gas generated by smelting in the smelting equipment through two air ducts, and then transports them to the filter box for multi-stage filtration treatment to prevent dust and waste gas from being discharged to the outside and polluting the environment.

[0022] The present invention has at least the following beneficial effects:

[0023] By setting the crushing mechanism, waste metal fragments of different volumes can be crushed multiple times. The waste metal fragments are put into the crushing box from the second feed pipe, and the volume of the waste metal fragments is reduced by the crushing of multiple crushing rollers. The crushed metal fragments fall on the screen for screening, and the qualified metal powder blocks pass through the screen directly through the first feed pipe into the smelting equipment body, while the unqualified metal powder blocks are screened and retained on the top by the screen. The screened metal powder blocks are discharged from the discharge port into the screw feeder, and then the screw feeder is started to re-feed the unqualified metal powder blocks into the second feed pipe so that they are crushed again by multiple crushing rollers until the volume of the waste metal fragments is roughly similar, so as to prevent the metal fragments from having different sizes. After the metal fragments are crushed, their smelting efficiency can be improved, and insufficient metal smelting can also be avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0025] Figure 1 It is a front view schematic diagram of the overall structure of the present invention;

[0026] Figure 2 It is a back view schematic diagram of the overall structure of the present invention;

[0027] Figure 3 It is a schematic diagram of the structure of the fixing block of the present invention;

[0028] Figure 4 It is a schematic diagram of the internal structure of the crushing box of the present invention;

[0029] Figure 5 It is a schematic diagram of the filter box structure of the present invention;

[0030] Figure 6 It is a schematic diagram of the internal structure of the smelting equipment body of the present invention.

[0031] In the figure, 1, smelting equipment body; 2, first feed pipe; 3, crushing mechanism; 4, crushing box; 5, second feed pipe; 6, first motor; 7, crushing roller; 8, screen; 9, discharge port; 10, screw feeder; 11, guide plate; 12, guide frame; 13, fixed block; 14, hydraulic telescopic rod; 15, sealing plate; 16, support frame; 17, fan; 18, air duct; 19, fixed plate; 20, filter box; 21, support plate; 22, screw; 23, fixed frame; 24, limit slide rail; 25, limit block; 26, positioning block; 27, positioning plate; 28, stirring roller; 29, second motor. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0033] In this embodiment, Figure 1-Figure 6 As shown, this embodiment provides an embodiment of a metal smelting device and a smelting method.

[0034] A metal smelting device comprises a smelting equipment body 1, a first feed pipe 2 is fixedly installed on the top of the smelting equipment body 1, a crushing mechanism 3 is arranged on the first feed pipe 2, the crushing mechanism 3 comprises a crushing box 4 fixedly installed on the top of the first feed pipe 2, a second feed pipe 5 is fixedly installed on the top of the crushing box 4, a plurality of first motors 6 are fixedly installed on the surface of the crushing box 4, a plurality of crushing rollers 7 connected to the first motors 6 are movably installed inside the crushing box 4, a screen 8 fixedly installed on the crushing box 4 is arranged below the crushing roller 7, discharge ports 9 opened on the crushing box 4 are arranged on both sides of the screen 8, and screw feeders 10 are fixedly installed on both sides of the crushing box 4. Through the setting of the crushing mechanism 3, waste metal fragments of different volumes can be crushed multiple times. The waste metal fragments are put into the crushing box 4 from the second feeding pipe 5, and the volume of the waste metal fragments is reduced by the crushing of multiple crushing rollers 7. The crushed metal fragments fall on the screen 8 for screening, and the qualified metal powder blocks pass through the screen 8 and directly enter the smelting equipment body 1 through the first feeding pipe 2, while the unqualified metal powder blocks are screened and retained at the top by the screen 8. The screened metal powder blocks are discharged from the discharge port 9 into the screw feeder 10, and then the screw feeder 10 is started to re-feed the unqualified metal powder blocks into the second feeding pipe 5 so that they are crushed again through multiple crushing rollers 7 until the volume of the waste metal fragments is roughly similar, so as to prevent the metal fragments from having different sizes. After the metal fragments are crushed, their smelting efficiency can be improved, and insufficient metal smelting can also be avoided.

[0035] In this embodiment, Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, the shape of the screen 8 is set to be triangular, and a plurality of guide plates 11 with one end inclined toward the discharge port 9 are symmetrically installed on the screen 8. A guide frame 12 is fixedly installed on the discharge port 9 and the output end of the screw feeder 10. The output end of the screw feeder 10 is obliquely installed on the second feed pipe 5. A fixing block 13 is arranged on the top of the second feed pipe 5. A hydraulic telescopic rod 14 is fixedly installed on the crushing box 4, and a sealing plate 15 connected to the fixing block 13 is fixedly installed on the hydraulic telescopic rod 14. By setting the screen 8 and the guide plate 11, the screen 8 is set to a triangle, so that the screened metal fragments can be easily rolled to both sides, avoiding accumulation in the middle of the screen 8 to affect the screening. At the same time, when rolling to both sides, it is also convenient to pass through the discharge port 9 to be discharged into the screw feeder 10. The setting of the guide plate 11 can make the metal fragments roll more concentratedly to the position of the discharge port 9, so that it is easier to enter the screw feeder 10. By setting the guide frame 12, it can be discharged from the discharge port The discharged metal fragments are guided into the screw feeder 10, and the output end of the screw feeder 10 is tiltedly installed on the second feed pipe 5, so that the metal fragments transported in the screw feeder 10 can be easily discharged into the second feed pipe 5. Through the arrangement of the fixed block 13, the hydraulic telescopic rod 14 and the sealing plate 15, the sealing plate 15 can be sealed on the top of the second feed pipe 5 when the hydraulic telescopic rod 14 is contracted, which can prevent dust from floating out from the top of the second feed pipe 5 during the metal crushing process.

[0036] In this embodiment, Figure 1 and Figure 5As shown, a support frame 16 is fixedly installed on the smelting equipment body 1, and a fan 17 is fixedly installed on the support frame 16. The top and bottom of the fan 17 are fixedly installed with air ducts 18 connected to the second feed pipe 5 and the smelting equipment body 1. A fixed plate 19 is fixedly sleeved on one end of the fan 17, and a filter box 20 connected to the fan 17 is arranged on the fixed plate 19. A plurality of filter screens are fixedly installed inside the filter box 20. Support plates 21 are fixedly installed on both sides of the fixed plate 19, and a screw 22 rotatably connected by a thread is arranged on the support plate 21. A fixed frame 23 is movably installed at one end of the screw 22, and two limit slide rails 24 are fixedly installed on the top of the fixed plate 19. A limit block 25 fixedly connected to the fixed frame 23 is slidably installed on the limit slide rail 24. Through the arrangement of the support frame 16, the fan 17, the air duct 18, the fixed plate 19 and the filter box 20, the dust and waste gas generated in the crushing and smelting process can be extracted and filtered to prevent the dust and waste gas from being discharged to the outside and polluting the environment. During the crushing and smelting process, the fan 17 is started, and the fan 17 respectively extracts the dust generated by the crushing in the crushing box 4 and the waste gas generated by the smelting in the smelting equipment body 1 through the two air ducts 18, and then transports them to the filter box 20 for multi-stage filtering. Through the arrangement of the support plate 21, the screw 22 and the fixed frame 23, the screw 22 is rotated by relying on the support plate 21, the screw 22 and the fixed frame 23. The threads between the plates 21 drive the fixed frame 23 to move until the two fixed frames 23 are both against the filter box 20 to clamp it, and the filter box 20 is fixed on the fixed plate 19 and connected to the fan 17. At the same time, the screw 22 is rotated in the opposite direction to drive the fixed frame 23 away from the filter box 20, and then the filter box 20 can be removed for cleaning. Through the setting of the limiting slide rail 24 and the limiting block 25, the limiting block 25 connected to the fixed frame 23 slides on the limiting slide rail 24, which can limit the moving fixed frame 23 to prevent deviation so that it can accurately clamp the filter box 20.

[0037] In this embodiment, Figure 1 , Figure 5 and Figure 6 As shown, a positioning block 26 is fixedly installed on the surface of the fixed plate 19, a positioning plate 27 used in conjunction with the positioning block 26 is fixedly installed on the top of the filter box 20, a plurality of stirring rollers 28 are movably installed inside the smelting equipment body 1, and a second motor 29 connected to the stirring rollers 28 is fixedly installed on the surface of the smelting equipment body 1. Through the arrangement of the positioning block 26 and the positioning plate 27, the filter box 20 can be positioned when it is installed, so that the two fixed frames 23 can clamp and fix the filter box 20 more easily, and through the arrangement of the stirring rollers 28 and the second motor 29, the metal powder blocks accumulated in the smelting equipment body 1 can be stirred, so that the metal powder blocks can be fully heated and the smelting is more sufficient.

[0038] In this embodiment, if Figure 1-Figure 6As shown, the working process of a metal smelting device and smelting method provided in this embodiment is as follows:

[0039] Step 1, first start the multiple first motors 6 on the crushing box 4, so that the first motors 6 drive the multiple crushing rollers 7 in the crushing box 4 to rotate, and then put the waste metal fragments from the second feeding pipe 5 into the crushing box 4, the waste metal fragments are crushed by the multiple crushing rollers 7 to reduce their volume, and the crushed metal fragments fall on the screen 8 for screening, and the qualified metal powder blocks pass through the screen 8 directly through the first feeding pipe 2 into the smelting equipment body 1, while the unqualified metal powder blocks are screened by the screen 8 and retained at the top:

[0040] Step 2: The screened metal powder blocks are discharged from the discharge port 9 into the screw feeder 10, and then the screw feeder 10 is started to feed the unqualified metal powder blocks back into the second feed pipe 5 so that they are crushed again through multiple crushing rollers 7 until all the metal powder blocks are crushed to the qualified state and fall into the smelting equipment body 1;

[0041] Step 3: After the waste metal powder blocks enter the smelting equipment body 1, the smelting equipment body 1 is started to smelt the metal powder blocks, and then the plurality of second motors 29 are started to drive the stirring rollers 28 in the smelting equipment body 1 to rotate, so that the stirring rollers 28 stir the accumulated metal powder blocks, so that the metal powder blocks can be fully heated and smelted more fully;

[0042] Step 4, during the crushing and smelting process, the fan 17 is started, and the fan 17 extracts the dust generated by crushing in the crushing box 4 and the exhaust gas generated by smelting in the smelting equipment body 1 through two air ducts 18, and then transports them to the filter box 20 for multi-stage filtration treatment to prevent the dust and exhaust gas from being discharged to the outside and polluting the environment.

[0043] In summary, in this embodiment, according to a metal smelting device and a smelting method of this embodiment, by setting the screen 8 and the guide plate 11, the screen 8 is set to a triangle, so that the screened metal fragments can be easily rolled to both sides, avoiding accumulation in the middle of the screen 8 to affect the screening, and at the same time, when rolling to both sides, it is also convenient to pass through the discharge port 9 to be discharged into the screw feeder 10, and the setting of the guide plate 11 can make the metal fragments roll more concentratedly to the position of the discharge port 9, so that it is easier to enter the screw feeder 10, and through the setting of the guide frame 12, the metal fragments discharged from the discharge port 9 can be guided to be discharged into the screw feeder 10, and the screw The output end of the screw conveyor 10 is installed obliquely on the second feed pipe 5, so that the metal fragments transported in the screw conveyor 10 can be easily discharged into the second feed pipe 5. Through the arrangement of the fixed block 13, the hydraulic telescopic rod 14 and the sealing plate 15, the sealing plate 15 can be sealed on the top of the second feed pipe 5 when the hydraulic telescopic rod 14 is contracted, which can prevent dust from floating outward from the top of the second feed pipe 5 during the metal crushing process. Through the arrangement of the support frame 16, the fan 17, the air duct 18, the fixed plate 19 and the filter box 20, the dust and waste gas generated in the crushing and smelting process can be extracted and filtered to avoid the dust and waste gas being discharged to the outside to pollute the environment. During the process, the fan 17 is started, and the fan 17 extracts the dust generated by the crushing in the crushing box 4 and the exhaust gas generated by the smelting in the smelting equipment body 1 through the two air ducts 18, and then transports them to the filter box 20 for multi-stage filtering. Through the arrangement of the support plate 21, the screw 22 and the fixed frame 23, the screw 22 is rotated to drive the fixed frame 23 to move by relying on the thread between the screw and the support plate 21 until the two fixed frames 23 are both close to the filter box 20 to clamp it, and the filter box 20 is fixed on the fixed plate 19 and connected to the fan 17. At the same time, the screw 22 is rotated in the opposite direction to drive the fixed frame 23 away from the filter box 20, and then the filter box 20 can be taken out The filter box 20 can be cleaned by cleaning the filter box 20. By setting the limiting slide rail 24 and the limiting block 25, the limiting block 25 connected to the fixed frame 23 slides on the limiting slide rail 24, which can limit the moving fixed frame 23 to prevent deviation so that it can accurately clamp the filter box 20. By setting the positioning block 26 and the positioning plate 27, it can play a positioning role when installing the filter box 20, so that the two fixed frames 23 can clamp and fix the filter box 20 more easily. By setting the stirring roller 28 and the second motor 29, the metal powder blocks accumulated in the smelting equipment body 1 can be stirred, so that the metal powder blocks can be fully heated and the smelting can be more sufficient.

[0044] For example, certain words are used in the specification and claims to refer to specific components. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. This specification and claims do not use differences in names as a way to distinguish components, but use differences in the functions of components as the criteria for distinction. For example, "including" mentioned throughout the specification and claims is an open term, so it should be interpreted as "including but not limited to". "Approximately" means that within an acceptable error range, those skilled in the art can solve technical problems within a certain error range and basically achieve technical effects.

[0045] It should be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a product or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such product or system. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the product or system including the elements.

[0046] The above description shows and describes several preferred embodiments of the present invention, but as mentioned above, it should be understood that the present invention is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the invention concept described herein through the above teachings or the technology or knowledge of the relevant field. Changes and variations made by those skilled in the art do not depart from the spirit and scope of the present invention, and should be within the scope of protection of the claims attached to the present invention.

Claims

1. A metal smelting device, comprising a smelting equipment body (1), a first feed pipe (2) being fixedly mounted on the top of the smelting equipment body (1), characterized in that: The first feed pipe (2) is provided with a pulverizing mechanism (3), the pulverizing mechanism (3) comprising a pulverizing box (4) fixedly mounted on the top of the first feed pipe (2), a second feed pipe (5) fixedly mounted on the top of the pulverizing box (4), a plurality of first motors (6) fixedly mounted on the surface of the pulverizing box (4), a plurality of crushing rollers (7) connected to the first motors (6) movably mounted inside the pulverizing box (4), a screen (8) fixedly mounted on the pulverizing box (4) is provided below the crushing rollers (7), discharge ports (9) opened on the pulverizing box (4) are provided on both sides of the screen (8), and screw feeders (10) are fixedly mounted on both sides of the pulverizing box (4).

2. A metal smelting device according to claim 1, characterized in that: The shape of the screen (8) is set to be triangular, and a plurality of guide plates (11) with one end inclined toward the discharge port (9) are symmetrically mounted on the screen (8).

3. A metal smelting device according to claim 1, characterized in that: A flow guide frame (12) is fixedly mounted on the discharge port (9) and the output end of the screw conveyor (10), and the output end of the screw conveyor (10) is obliquely mounted on the second feed pipe (5).

4. A metal smelting device according to claim 1, characterized in that: A fixing block (13) is arranged on the top of the second feeding pipe (5), a hydraulic telescopic rod (14) is fixedly mounted on the pulverizing box (4), and a sealing plate (15) connected to the fixing block (13) is fixedly mounted on the hydraulic telescopic rod (14).

5. A metal smelting device according to claim 1, characterized in that: A support frame (16) is fixedly mounted on the smelting equipment body (1), a fan (17) is fixedly mounted on the support frame (16), a duct (18) connected to the second feed pipe (5) and the smelting equipment body (1) is fixedly mounted on the top and bottom of the fan (17), a fixed plate (19) is fixedly sleeved on one end of the fan (17), a filter box (20) connected to the fan (17) is arranged on the fixed plate (19), and a plurality of filter screens are fixedly mounted inside the filter box (20).

6. A metal smelting device according to claim 5, characterized in that: Support plates (21) are fixedly mounted on both sides of the fixing plate (19), a screw rod (22) rotatably connected via a thread is provided on the supporting plate (21), and a fixing frame (23) is movably mounted on one end of the screw rod (22).

7. A metal smelting device according to claim 6, characterized in that: Two limiting slide rails (24) are fixedly mounted on the top of the fixed plate (19), and limiting blocks (25) fixedly connected to the fixed frame (23) are slidably mounted on the limiting slide rails (24).

8. A metal smelting device according to claim 7, characterized in that: A positioning block (26) is fixedly mounted on the surface of the fixing plate (19), and a positioning plate (27) used in conjunction with the positioning block (26) is fixedly mounted on the top of the filter box (20).

9. A metal smelting device according to claim 1, characterized in that: A plurality of stirring rollers (28) are movably mounted inside the smelting equipment body (1), and a second motor (29) connected to the stirring rollers (28) is fixedly mounted on the surface of the smelting equipment body (1).

10. A metal smelting device and smelting method according to claim 1, characterized in that: The following steps are involved: S1. First, the plurality of first motors (6) on the crushing box (4) are started, so that the first motors (6) drive the plurality of crushing rollers (7) in the crushing box (4) to rotate, and then the waste metal fragments are fed into the crushing box (4) from the second feeding pipe (5). The waste metal fragments are crushed by the plurality of crushing rollers (7) to reduce their volume. The crushed metal fragments fall on the screen (8) for screening. The qualified metal powder blocks pass through the screen (8) and directly enter the smelting equipment body (1) through the first feeding pipe (2), while the unqualified metal powder blocks are screened by the screen (8) and retained at the top: S2, the screened metal powder blocks are discharged from the discharge port (9) into the screw feeder (10), and then the screw feeder (10) is started to feed the unqualified metal powder blocks back into the second feed pipe (5) so that they are crushed again through multiple crushing rollers (7) until all the metal powder blocks are crushed to the qualified state and fall into the smelting equipment body (1); S3, after the waste metal powder blocks enter the smelting equipment body (1), the smelting equipment body (1) is started to smelt the metal powder blocks, and then a plurality of second motors (29) are started to drive the stirring rollers (28) in the smelting equipment body (1) to rotate, so that the stirring rollers (28) stir the accumulated metal powder blocks, so that the metal powder blocks can be fully heated and smelted more fully; S4. During the crushing and smelting process, the fan (17) is started, and the fan (17) respectively extracts the dust generated by crushing in the crushing box (4) and the waste gas generated by smelting in the smelting equipment body (1) through two air ducts (18), and then transports them to the filter box (20) for multi-stage filtering to prevent the dust and waste gas from being discharged to the outside and polluting the environment.

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