Gray cast iron smelting equipment

Abstract

The invention relates to the field of gray cast iron production, aims to solve the problems of low production efficiency and poor effect of an existing gray cast iron smelting device, and particularly discloses gray cast iron smelting equipment which comprises a smelting furnace body, and an exhaust treatment assembly is arranged at the upper end of the smelting furnace body. The exhaust treatment assembly comprises an exhaust pipe vertically arranged at one end of the top of the smelting furnace body, a cooling pipe is arranged at the top of the exhaust pipe, and a ceramic filter plate is arranged between the cooling pipe and the exhaust pipe; and a gas stirring mechanism is arranged in the smelting furnace body. According to the gray cast iron smelting equipment, through cooperation of the exhaust treatment assembly, the gas stirring mechanism and the driving assembly, high-temperature waste gas exhausted from the smelting furnace body can be filtered and subjected to impurity removal and then is introduced into the smelting furnace body again, bubbles can be generated in the smelting furnace body, the bubbles can drive melt to flow, gas stirring is achieved, and the smelting efficiency is improved. And the heating uniformity can be improved.

Description

Technical Field

[0001] The invention relates to the field of grey cast iron production, and in particular to grey cast iron smelting equipment. Background Art

[0002] Gray cast iron belongs to iron-based alloys, specifically cast iron with flake graphite, which is named because its fracture surface is dark gray when broken. The main components of this cast iron are iron, carbon, silicon, manganese, sulfur, phosphorus, etc., among which carbon exists in the form of flake graphite in cast iron.

[0003] When processing gray cast iron, the raw materials need to be placed in a furnace for heating and smelting. Conventional smelting equipment is generally a cylindrical furnace, and the heating element is generally located at the bottom or periphery of the furnace. Since the furnace body has a certain diameter, the raw materials on the periphery are often heated better during heating, while the raw materials in the middle are heated less effectively. This will lead to uneven temperature and composition in the melt. In addition, during the smelting process, some inclusions and gases (such as oxides, nitrogen, hydrogen, etc.) will inevitably be produced in the melt. If they are not interfered with, they will remain in the melt. The presence of inclusions and gases will significantly reduce the purity and mechanical properties of the casting, affecting the quality of the final product.

[0004] Therefore, it is necessary to propose a gray cast iron smelting equipment to solve the above problems. Summary of the invention

[0005] The main purpose of the present invention is to provide a gray cast iron smelting equipment, which can effectively solve the problems in the background technology.

[0006] To achieve the above object, the technical solution adopted by the present invention is:

[0007] A grey cast iron smelting device comprises a furnace body, an exhaust gas treatment assembly is arranged at the upper end of the furnace body, the exhaust gas treatment assembly comprises an exhaust pipe vertically arranged at one end of the top of the furnace body, a cooling pipe is arranged at the top of the exhaust pipe, and a ceramic filter plate is arranged between the cooling pipe and the exhaust pipe;

[0008] The furnace body is provided with a gas stirring mechanism, and the gas stirring mechanism includes a processing box arranged on the top of the furnace body, a partition is provided in the processing box, a hollow vertical shaft is rotatably connected to the middle of the partition, and the lower end of the vertical shaft extends to the inner side of the furnace body, a cross bar is provided at the bottom of the vertical shaft, and a nozzle connected to the vertical shaft is provided at the bottom of the cross bar, a first piston cylinder is provided on the outer periphery of the top of the partition, a hollow first piston rod is movably connected to the inner side of the first piston cylinder, and the first piston rod is away from the first piston cylinder. An air outlet is arranged at the end, an air inlet is arranged at the end of the first piston cylinder away from the first piston rod, and a third one-way valve is arranged on the air inlet and the air outlet, a branch pipe is connected to one side of the cooling pipe, a drainage pipe is connected to the branch pipe and the air inlet, a hollow ring is rotatably arranged at the upper end of the vertical shaft, a through hole corresponding to the hollow ring is arranged on the side wall of the upper end of the vertical shaft, a fixed pipe is connected to the side of the hollow ring, one end of the fixed pipe away from the hollow ring is fixed to the top of the partition, and a hose is connected to the fixed pipe and the air outlet;

[0009] It also includes a driving assembly for driving the first piston rod to move back and forth, the driving assembly includes a connecting seat arranged on the side wall of the upper end of the vertical axis, a roller is rotatably arranged on the end of the connecting seat away from the vertical axis, a force block corresponding to the roller is fixedly arranged on the end of the first piston rod away from the first piston cylinder, a first spring is arranged between the force block and the side wall of the first piston cylinder, a reducer is arranged at the top end of the furnace body, a driven wheel corresponding to the reducer is arranged at the upper end of the vertical axis, and a driving wheel meshing with the driven wheel is arranged at the output end of the reducer.

[0010] Preferably, the third one-way valve located on the air inlet is configured so that gas can only enter the first piston cylinder from the air inlet;

[0011] The third one-way valve located on the gas outlet is configured so that the gas can only be discharged from the gas outlet to the hose.

[0012] Preferably, a fixed block is fixedly provided on the side wall of the first piston cylinder, and a guide rod parallel to the first piston rod and the first piston cylinder is fixedly provided on the side of the first piston rod close to the fixed block, and the end of the guide rod away from the force block is movably guided by the fixed block, and the first spring is located on the guide rod.

[0013] Preferably, the ceramic filter plate is circular and is fixed to the outer side of the upper end of the vertical axis.

[0014] Preferably, the exhaust pipe and the cooling pipe have adjacent ends that are both in a trumpet shape, a cooling box filled with cooling water is provided on one side of the processing box, the upper end of the cooling pipe extends to the inner side of the cooling box and is submerged in the cooling water, and an exhaust port is provided on one side of the upper end of the cooling box.

[0015] Preferably, the cooling pipe is provided with a first one-way valve located above the branch pipe, and the first one-way valve is configured so that gas can only pass from the cooling pipe into the cooling box.

[0016] Preferably, a second one-way valve is provided on the inner side of the lower end of the vertical shaft, and the second one-way valve is configured so that the gas can only be transported downward from the vertical shaft.

[0017] Preferably, a push plate with a "V"-shaped cross-section is vertically arranged on the side of the vertical shaft, and the opening of the push plate is arranged away from the axis of the vertical shaft, and a telescopic component is arranged between the push plate and the vertical shaft, and the telescopic component includes a second piston cylinder fixedly arranged on the side of the vertical shaft and connected to the vertical shaft, a second piston rod is movably connected to the inner side of the second piston cylinder, and one end of the second piston rod extends to the outer side of the second piston cylinder and is fixedly connected to the side wall of the push plate, and a second spring is arranged at one end of the second piston rod away from the push plate and one end of the inner cavity of the second piston cylinder close to the push plate.

[0018] Preferably, a hollow collecting box is provided at one end of the top of the furnace body, a vertical cylinder is vertically connected to the top of the collecting box, and the upper end of the vertical cylinder extends to the inner side of the processing box and corresponds to the bottom of the ceramic filter plate, and a flexible brush in contact with the bottom of the ceramic filter plate is provided at one end of the top of the vertical cylinder.

[0019] Preferably, the side of the force-bearing block close to the roller is arc-shaped.

[0020] Compared with the prior art, the present invention provides a gray cast iron smelting equipment, which has the following beneficial effects:

[0021] 1. The gray cast iron smelting equipment, through the cooperation of the exhaust treatment component, the gas stirring mechanism and the driving component, can filter and remove impurities in the high-temperature exhaust gas discharged from the furnace body and then pass it into the interior of the furnace body again, so that bubbles can be generated inside the furnace body. After the bubbles are generated, they move upward and burst. During this period, the bubbles can drive the melt to flow and realize gas stirring, which can increase the uniformity of heating and the contact area between the melt and the gas, and promote the deoxidation, decarburization, degassing and other reactions. These reactions are helpful to remove harmful impurities in the melt and improve the purity of the melt. Gas stirring can also speed up the mass transfer rate inside the melt and make the composition of the melt more uniform, which helps to reduce the component segregation and solidification defects in the melt and improve the quality of castings.

[0022] 2. The gray cast iron smelting equipment has a ceramic filter plate that rotates along with the vertical axis, and part of the ceramic filter plate corresponds to the exhaust pipe and the cooling pipe, thereby improving the utilization rate of the ceramic filter plate and avoiding local saturation. The setting of the collecting box, the vertical cylinder and the flexible brush facilitates the cleaning of the ceramic filter plate and reduces the possibility of blockage.

[0023] 3. The gray cast iron smelting equipment facilitates the cooling of the high-temperature gas after filtration by setting a cooling box and an exhaust port, thereby avoiding the impact of high-temperature gas discharge on the environment and facilitating subsequent deep waste gas treatment.

[0024] 4. The gray cast iron smelting equipment can use the intermittent gas pressure entering the vertical axis as intermittent power through the cooperation of the set push plate, the second piston cylinder, the second piston rod, and the second spring to push the melt. The melt in the inner periphery of the furnace body can be continuously pushed toward the periphery, which is convenient for contact with the inner wall of the furnace body for heating, thereby improving the uniformity of heating. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0026] Figure 2 It is a partial cross-sectional structural schematic diagram of the furnace body and the processing box of the present invention;

[0027] Figure 3 It is a schematic diagram of the structure of the furnace body, the processing box and the cooling box of the present invention in a disassembled state;

[0028] Figure 4 It is a schematic diagram of the structure of the partition, ceramic filter plate, vertical shaft and cooling box of the present invention in a coordinated state;

[0029] Figure 5 The present invention Figure 4 A structural diagram from another perspective based on the above;

[0030] Figure 6 It is a schematic diagram of the structure of the roller and the force bearing block of the present invention in a matching state;

[0031] Figure 7 It is a schematic diagram of the structure of the collecting box and the vertical cylinder of the present invention;

[0032] Figure 8 It is a schematic cross-sectional structure diagram of the vertical axis of the present invention;

[0033] Fig. 9 It is a schematic diagram of the cross-sectional structure of the upper end of the vertical axis of the present invention;

[0034] Fig.10 The present invention Figure 8 Enlarged view of point A in the middle;

[0035] Fig.11 It is a schematic cross-sectional structure diagram of the first piston cylinder and the first piston rod of the present invention;

[0036] Fig.12 It is a schematic diagram of the cross-sectional structure of the cooling box of the present invention;

[0037] Fig.13It is a schematic diagram of the structure of the support of the present invention.

[0038] In the figure: 1, furnace body; 2, treatment box; 3, cooling box; 4, bracket; 5, cylinder; 6, turning shaft; 7, pulling rod; 8, pushing plate; 9, cross bar; 10, vertical shaft; 11, heating element; 12, material inlet; 13, partition; 14, ceramic filter plate; 15, collecting box; 16, vertical cylinder; 17, driven wheel; 18, reducer; 19, driving wheel; 20, cooling pipe; 21, first one-way valve; 22, branch pipe; 23, drainage pipe; 24, exhaust pipe; 25 , the first piston cylinder; 26, the first piston rod; 27, the connecting seat; 28, the roller; 29, the force block; 30, the fixed block; 31, the guide rod; 32, the first spring; 33, the fixed tube; 34, the hose; 35, the hollow ring; 36, the flexible brush; 37, the second one-way valve; 38, the nozzle; 39, the through hole; 40, the second piston cylinder; 41, the second piston rod; 42, the second spring; 43, the air inlet; 44, the third one-way valve; 45, the exhaust port; 46, the air outlet. DETAILED DESCRIPTION

[0039] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0040] like Figure 1-Figure 5 , Fig.12As shown, a gray cast iron smelting equipment includes a furnace body 1, a heating element 11 is arranged on the periphery of the furnace body 1, the heating element 11 is a resistance heating body, a material port 12 is arranged on the side of the upper end of the furnace body 1, and an exhaust gas treatment component is arranged on the upper end of the furnace body 1, and the exhaust gas treatment component includes an exhaust pipe 24 vertically arranged at one end of the top of the furnace body 1, a cooling pipe 20 is arranged on the top of the exhaust pipe 24, and the exhaust pipe 24 and the cooling pipe 20 are close to each other. A ceramic filter plate 14 is arranged between the cooling pipe 20 and the exhaust pipe 24, and the ceramic filter plate 14 is circular and fixed to the outer side of the upper end of the vertical axis 10. The ceramic filter plate 14 is resistant to high temperature and corrosion and can work in extreme environments. The porous structure of the ceramic filter plate makes it have a high The filtration efficiency is high and can capture tiny particles in the exhaust gas. The ceramic filter plate 14 rotates with the vertical axis 10. Parts of the ceramic filter plate 14 correspond to the exhaust pipe 24 and the cooling pipe 20, thereby improving the utilization rate of the ceramic filter plate 14 and avoiding local saturation. A cooling box 3 filled with cooling water is provided on one side of the treatment box 2. The upper end of the cooling pipe 20 extends to the inner side of the cooling box 3 and is submerged by the cooling water. An exhaust port 45 is provided on one side of the upper end of the cooling box 3. A first one-way valve 21 located above the branch pipe 22 is provided on the cooling pipe 20, and the first one-way valve 21 is configured so that the gas can only pass from the cooling pipe 20 into the cooling box 3. The cooling box 3 and the exhaust port 45 facilitate the cooling of the high-temperature gas after filtration, avoiding the discharge of high-temperature gas affecting the environment, and facilitating the subsequent deep exhaust gas treatment.

[0041] like Figure 2-Figure 6 , Figure 8-Figure 9 , Fig.11As shown, a gas stirring mechanism is provided in the furnace body 1, and the gas stirring mechanism includes a processing box 2 arranged on the top of the furnace body 1, and a partition 13 is provided in the processing box 2. A hollow vertical shaft 10 is rotatably connected to the middle of the partition 13, and the lower end of the vertical shaft 10 extends to the inner side of the furnace body 1, and a cross bar 9 is provided at the bottom of the vertical shaft 10. A nozzle 38 connected to the vertical shaft 10 is provided at the bottom of the cross bar 9. A second one-way valve 37 is provided on the inner side of the lower end of the vertical shaft 10, and the second one-way valve 37 is configured so that gas can only be transported downward from the vertical shaft 10. The second one-way valve 37 is a high-temperature one-way valve, which is made of high-temperature resistant alloy materials such as alloy steel and stainless steel. A first piston cylinder 25 is evenly provided on the outer periphery of the top of the partition 13, and a hollow first piston rod 26 is movably connected to the inner side of the first piston cylinder 25, and a gas outlet is provided at the end of the first piston rod 26 away from the first piston cylinder 25. 46, an air inlet 43 is provided at one end of the first piston cylinder 25 away from the first piston rod 26, and a third one-way valve 44 is provided on both the air inlet 43 and the air outlet 46, the third one-way valve 44 located on the air inlet 43 is configured so that gas can only enter the first piston cylinder 25 from the air inlet 43, and the third one-way valve 44 located on the air outlet 46 is configured so that gas can only be discharged from the air outlet 46 to the hose 34, one side of the cooling pipe 20 is connected with a branch pipe 22, and a drainage pipe 23 is provided between the branch pipe 22 and the air inlet 43, a hollow ring 35 is rotatably provided at the upper end of the vertical shaft 10, a through hole 39 corresponding to the hollow ring 35 is provided on the side wall of the upper end of the vertical shaft 10, a fixed pipe 33 is provided on the side of the hollow ring 35, one end of the fixed pipe 33 away from the hollow ring 35 is fixed to the top of the partition 13, and a hose 34 is provided between the fixed pipe 33 and the air outlet 46;

[0042] like Figure 4-Figure 6As shown, it also includes a driving assembly for driving the first piston rod 26 to move back and forth, and the driving assembly includes a connecting seat 27 arranged on the side wall of the upper end of the vertical shaft 10, and the end of the connecting seat 27 away from the vertical shaft 10 is rotatably provided with a roller 28, and the end of the first piston rod 26 away from the first piston cylinder 25 is fixedly provided with a force block 29 corresponding to the roller 28, and the side of the force block 29 close to the roller 28 is arc-shaped, and the two are intermittently contacted and matched, and a first spring 32 is arranged between the force block 29 and the side wall of the first piston cylinder 25, and a fixed block 30 is fixedly provided on the side wall of the first piston cylinder 25, and the side of the first piston rod 26 close to the fixed block 30 A guide rod 31 parallel to the first piston rod 26 and the first piston cylinder 25 is fixedly provided, and one end of the guide rod 31 away from the force block 29 is movably guided by the fixed block 30, and the first spring 32 is located on the guide rod 31, so that the first piston rod 26 can be guided for displacement, and the first spring 32 can be easily fixed. A reducer 18 is provided at one end of the top of the furnace body 1, and a driven wheel 17 corresponding to the reducer 18 is provided at the upper end of the vertical shaft 10. A driving wheel 19 meshing with the driven wheel 17 is provided at the output end of the reducer 18, so that the reducer 18 drives the vertical shaft 10 to rotate through the meshing of the driven wheel 17 and the driving wheel 19;

[0043] The above-mentioned exhaust treatment component cooperates with the gas stirring mechanism and the driving component, and the high-temperature exhaust gas discharged from the furnace body 1 can be filtered and impurities removed before being introduced into the furnace body 1 again, and bubbles can be generated inside the furnace body 1. After the bubbles are generated, they move upward and burst. During this period, the bubbles can drive the melt to flow, realize gas stirring, increase the uniformity of heating, and increase the contact area between the melt and the gas, so as to promote the deoxidation, decarburization, degassing and other reactions. These reactions are helpful to remove harmful impurities in the melt and improve the purity of the melt. Gas stirring can also speed up the mass transfer rate inside the melt, making the composition of the melt more uniform, which helps to reduce the component segregation and solidification defects in the melt and improve the quality of the casting;

[0044] like Figure 2-Figure 5 , Figure 8 , Fig.10As shown, in order to further achieve uniform heating, a push plate 8 with a "V"-shaped cross section is vertically arranged on the side of the vertical shaft 10, and the opening of the push plate 8 is arranged away from the axis of the vertical shaft 10. This shape and arrangement can push as much melt as possible to move outward when displacing outward, and can reduce the push on the melt when displacing inward and resetting. A telescopic component is arranged between the push plate 8 and the vertical shaft 10, and the telescopic component includes a second piston cylinder 40 fixedly arranged on the side of the vertical shaft 10 and connected to the vertical shaft 10, and a second piston rod 41 is movably connected to the inner side of the second piston cylinder 40, and the second piston One end of the rod 41 extends to the outside of the second piston cylinder 40 and is fixedly connected to the side wall of the push plate 8. A second spring 42 is provided at one end of the second piston rod 41 away from the push plate 8 and at one end of the inner cavity of the second piston cylinder 40 close to the push plate 8. The push plate 8, the second piston cylinder 40, the second piston rod 41 and the second spring 42 cooperate with each other to utilize the intermittent gas pressure entering the vertical shaft 10 as intermittent power to push the melt, and the melt in the inner periphery of the furnace body 1 can be continuously pushed toward the periphery, so as to facilitate contact with the inner wall of the furnace body 1 for heating, thereby improving the uniformity of heating.

[0045] In addition, if Figure 2-Figure 4 , Figure 7 As shown, a hollow collecting box 15 is provided at one end of the top of the furnace body 1, and a vertical cylinder 16 is vertically connected to the top of the collecting box 15. The upper end of the vertical cylinder 16 extends to the inner side of the processing box 2 and corresponds to the bottom of the ceramic filter plate 14. A flexible brush 36 in contact with the bottom of the ceramic filter plate 14 is provided at one end of the top of the vertical cylinder 16. The arrangement of the collecting box 15, the vertical cylinder 16 and the flexible brush 36 facilitates the cleaning of the ceramic filter plate 14 and reduces the possibility of clogging.

[0046] like Figure 1 , Fig.13 As shown, the furnace body 1 is arranged on the bracket 4, and a turning shaft 6 is rotatably arranged on the upper end of the bracket 4, and one end of the turning shaft 6 is fixedly connected to the side wall of the furnace body 1, wherein a cylinder 5 is arranged on one side of the bracket 4, and a pulling rod 7 is fixedly arranged on the end of the turning shaft 6 corresponding to the cylinder 5, and the end of the pulling rod 7 away from the turning shaft 6 is movably connected to the output end of the cylinder 5, so that the furnace body 1 is driven to rotate when the cylinder 5 is extended or retracted.

[0047] It should be noted that the vertical shaft 10, the cross bar 9, the push plate 8, the second piston rod 41, the second piston cylinder 40, the second spring 42 and other structures located in the furnace body 1 are all made of high-temperature resistant alloy materials.

[0048] Working principle: when in use, the gray cast iron raw material will gradually turn into a melt when heated inside the furnace body 1, and then the reducer 18 will be controlled to drive the driving wheel 19 to rotate, and the driving wheel 19 will drive the vertical shaft 10 to rotate slowly through the driven wheel 17, and the vertical shaft 10 will drive the cross bar 9 and the push plate 8 to rotate synchronously. The cross bar 9 and the push plate 8 can play a certain stirring role. When the vertical shaft 10 rotates, it will also drive the upper ceramic filter plate 14 and the connecting seat 27 to rotate. The high-temperature exhaust gas generated in the furnace body 1 will be discharged through the exhaust pipe 24, and enter the cooling pipe 20 after being filtered by the ceramic filter plate 14. The exhaust gas will enter the first piston cylinder 25, and the remaining exhaust gas will enter the cooling water in the cooling box 3 for cooling after passing through the first one-way valve 21. At the same time, the cooling water can also play a certain role in removing impurities. Finally, the gas is discharged to the outside through the exhaust port 45 or to a special exhaust gas treatment equipment for deeper treatment. During this period, the connecting seat 27 drives the roller 28 to rotate. When the roller 28 rotates, it will touch the force block 29. Then, the force block 29 is compressed to drive the first piston rod 26 to move, the first spring 32 is compressed, and the guide rod 31 cooperates with the fixed block 30 for guidance. The first piston cylinder 25 and the first The gas in the first piston rod 26 is pressed into the hose 34 through the gas outlet 46, then enters the hollow ring 35 through the fixed tube 33, and enters the interior of the vertical shaft 10 through the through hole 39. The gas pressure can drive the second piston rod 41 to move. The second piston rod 41 compresses the second spring 42 and drives the push plate 8 to move toward the periphery. At the same time, the gas entering the vertical shaft 10 can enter the cross bar 9, and finally blown out through the nozzle 38 and bubbles float in the furnace body 1. While the push plate 8 and the cross bar 9 are stirred, the bubbles are further stirred, and the push plate 8 can reciprocate to push the melt, which is beneficial to the melting of the melt. The heating of the body is uniform and the product quality is improved. When the roller 28 is separated from the force-bearing block 29, the first piston rod 26 is reset under the air pressure and the reverse force of the first spring 32, waiting to contact the roller 28 again in the future, and this cycle is repeated. When the ceramic filter plate 14 rotates, it is relatively displaced with the flexible brush 36. The flexible brush 36 cleans the bottom of the ceramic filter plate 14. Impurity particles fall into the collection box 15 through the vertical cylinder 16 for collection. After use, the cylinder 5 can be controlled to drive the pulling rod 7, and the pulling rod 7 drives the furnace body 1 to tilt through the flip shaft 6 to achieve discharge.

[0049] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A grey cast iron smelting device, comprising a furnace body (1), characterized in that: An exhaust gas treatment component is arranged at the upper end of the furnace body (1), and the exhaust gas treatment component comprises an exhaust pipe (24) vertically arranged at one end of the top of the furnace body (1), a cooling pipe (20) is arranged at the top of the exhaust pipe (24), and a ceramic filter plate (14) is arranged between the cooling pipe (20) and the exhaust pipe (24); A gas stirring mechanism is provided in the furnace body (1), and the gas stirring mechanism includes a processing box (2) arranged on the top of the furnace body (1), and a partition (13) is provided in the processing box (2). A hollow vertical shaft (10) is rotatably connected to the middle of the partition (13), and the lower end of the vertical shaft (10) extends to the inner side of the furnace body (1), and a cross bar (9) is provided at the bottom of the vertical shaft (10). A nozzle (38) connected to the vertical shaft (10) is provided at the bottom of the cross bar (9). A first piston cylinder (25) is provided on the outer periphery of the top of the partition (13), and a hollow first piston rod (26) is movably connected to the inner side of the first piston cylinder (25), and an air outlet (46) is provided at the end of the first piston rod (26) away from the first piston cylinder (25). An air inlet (43) is provided at one end of the first piston cylinder (25) away from the first piston rod (26), and a third one-way valve (44) is provided on both the air inlet (43) and the air outlet (46); a branch pipe (22) is connected to one side of the cooling pipe (20); a drainage pipe (23) is provided between the branch pipe (22) and the air inlet (43); a hollow ring (35) is rotatably provided at the upper end of the vertical shaft (10); a through hole (39) corresponding to the hollow ring (35) is provided on the side wall of the upper end of the vertical shaft (10); a fixed pipe (33) is provided on the side of the hollow ring (35); an end of the fixed pipe (33) away from the hollow ring (35) is fixed to the top of the partition (13), and a hose (34) is provided between the fixed pipe (33) and the air outlet (46); The invention also comprises a driving assembly for driving the first piston rod (26) to move back and forth, the driving assembly comprising a connecting seat (27) arranged on the side wall of the upper end of the vertical shaft (10), a roller (28) being rotatably arranged at one end of the connecting seat (27) away from the vertical shaft (10), a force block (29) corresponding to the roller (28) being fixedly arranged at one end of the first piston rod (26) away from the first piston cylinder (25), a first spring (32) being arranged between the force block (29) and the side wall of the first piston cylinder (25), a reducer (18) being arranged at one end of the top of the furnace body (1), a driven wheel (17) corresponding to the reducer (18) being arranged at the upper end of the vertical shaft (10), and a driving wheel (19) meshing with the driven wheel (17) being arranged at the output end of the reducer (18).

2. A grey cast iron smelting equipment according to claim 1, characterized in that: The third one-way valve (44) located on the air inlet (43) is configured so that gas can only enter the first piston cylinder (25) from the air inlet (43); The third one-way valve (44) located on the gas outlet (46) is configured so that the gas can only be discharged from the gas outlet (46) to the hose (34).

3. The gray cast iron smelting equipment according to claim 1, characterized in that: A fixing block (30) is fixedly arranged on the side wall of the first piston cylinder (25); a guide rod (31) parallel to the first piston rod (26) and the first piston cylinder (25) is fixedly arranged on the side of the first piston rod (26) close to the fixing block (30); an end of the guide rod (31) away from the force-bearing block (29) is movably guided and matched with the fixing block (30); and a first spring (32) is located on the guide rod (31).

4. The gray cast iron smelting equipment according to claim 1, characterized in that: The ceramic filter plate (14) is circular and is fixed to the outer side of the upper end of the vertical shaft (10).

5. The gray cast iron smelting equipment according to claim 1, characterized in that: The exhaust pipe (24) and the cooling pipe (20) are both in a bell-mouth shape at their adjacent ends. A cooling box (3) filled with cooling water is provided on one side of the processing box (2). The upper end of the cooling pipe (20) extends to the inner side of the cooling box (3) and is submerged in the cooling water. An exhaust port (45) is provided on one side of the upper end of the cooling box (3).

6. A grey cast iron smelting equipment according to claim 5, characterized in that: The cooling pipe (20) is provided with a first one-way valve (21) located above the branch pipe (22), and the first one-way valve (21) is configured so that gas can only pass from the cooling pipe (20) into the cooling box (3).

7. The gray cast iron smelting equipment according to claim 1, characterized in that: A second one-way valve (37) is provided on the inner side of the lower end of the vertical shaft (10), and the second one-way valve (37) is configured so that gas can only be transported downward from the vertical shaft (10).

8. The gray cast iron smelting equipment according to claim 1, characterized in that: A push plate (8) having a V-shaped cross section is vertically arranged on the side of the vertical shaft (10), and the opening of the push plate (8) is arranged away from the axis of the vertical shaft (10). A telescopic component is arranged between the push plate (8) and the vertical shaft (10), and the telescopic component includes a second piston cylinder (40) fixedly arranged on the side of the vertical shaft (10) and connected to the vertical shaft (10), a second piston rod (41) is movably connected to the inner side of the second piston cylinder (40), and one end of the second piston rod (41) extends to the outer side of the second piston cylinder (40) and is fixedly connected to the side wall of the push plate (8), and a second spring (42) is arranged at one end of the second piston rod (41) away from the push plate (8) and one end of the inner cavity of the second piston cylinder (40) close to the push plate (8).

9. The gray cast iron smelting equipment according to claim 4, characterized in that: A hollow collecting box (15) is provided at one end of the top of the furnace body (1), and a vertical cylinder (16) is vertically connected to the top of the collecting box (15), and the upper end of the vertical cylinder (16) extends to the inner side of the processing box (2) and corresponds to the bottom of the ceramic filter plate (14), and a flexible brush (36) in contact with the bottom of the ceramic filter plate (14) is provided at one end of the top of the vertical cylinder (16).

10. The gray cast iron smelting equipment according to claim 1, characterized in that: The side of the force bearing block (29) close to the roller (28) is arc-shaped.

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