Chromium-free steel ball casting medium-frequency electric furnace smelting system and production method thereof

Abstract

The invention relates to the field of steel ball machining equipment, in particular to a chromium-free steel ball casting medium-frequency electric furnace smelting system and a production method thereof. The medium-frequency electric furnace smelting system for chromium steel ball casting comprises a medium-frequency electric furnace, a condensation tank and a cold water tank, the medium-frequency electric furnace comprises a medium-frequency electric furnace body and a furnace body frame, the medium-frequency electric furnace body is located at the upper end of the furnace body frame, a heating cavity is formed in the medium-frequency electric furnace body, and an electromagnetic induction heating assembly is installed in the heating cavity; a refrigeration mechanism is mounted in the condensation tank; according to the chromium-free steel ball casting medium-frequency electric furnace smelting system, through the arrangement of the condensation tank, discharged waste gas can be subjected to a neutralization reaction to reach the environment-friendly standard to be discharged, meanwhile, the waste gas can be refrigerated, and harmful substances such as metal ash in the waste gas can be deposited in the condensation tank; in this way, waste gas can be purified and cooled, meanwhile, the cooling medium can be subjected to heat exchange refrigeration, cyclic utilization is achieved, and multiple purposes are achieved.

Description

Technical Field

[0001] The invention relates to the field of steel ball processing equipment, in particular to a chromium-free steel ball casting medium-frequency electric furnace smelting system and a production method thereof. Background Art

[0002] When steel balls act as grinding media in the process of metal refining and grinding, they will become powder and directly mix into the ground metal minerals with the long-term use of steel balls. The chromium element in steel balls is difficult to separate from some metals, so chromium-free steel balls are generally used.

[0003] During the production process, chromium-free steel balls are generally smelted and melted in a medium-frequency electric furnace. The structure of the medium-frequency electric furnace is as follows: it generally includes a furnace frame, which is used to perform electromagnetic induction heating on the materials put into it; wherein a heating chamber is formed at the middle position inside the furnace frame, and a yoke is installed on the inner wall of the heating chamber in a spiral ring shape, and an inductor is provided on the outer side of the yoke. After the inductor and the yoke are connected to the power supply, electromagnetic induction heating is performed, which is used to perform melting and heating operations on the steel ball raw materials placed in the heating chamber; at the same time, an insulating ring plate lined cooling pipe is arranged inside the furnace frame, which is used to cool the inside of the furnace frame when the furnace frame heats the materials;

[0004] However, this medium frequency electric furnace also has defects when casting and smelting chrome-free steel balls: First, in order to ensure the cooling effect of the cooling tube lined with the insulating ring plate, tap water is generally continuously introduced into the cooling tube lined with the insulating ring plate. The tap water needs to be continuously injected, so the water consumption is relatively large; Second, the heating chamber will produce high-temperature waste smoke when smelting the raw materials for the production of chrome-free steel balls. The waste smoke not only contains a large amount of metal dust, but also carries toxic substances produced during the high-temperature smelting of the raw materials. The waste smoke is directly discharged into the air, which will pollute the air environment and cause respiratory damage to the operators near the medium frequency electric furnace;

[0005] In view of the problems in the above-mentioned background technology, the present invention aims to provide a chromium-free steel ball casting medium-frequency electric furnace smelting system and a production method thereof. Summary of the invention

[0006] The object of the present invention is to provide a chromium-free steel ball casting medium-frequency electric furnace smelting system and a production method thereof, so as to solve the problems raised in the above-mentioned background technology.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A chromium-free steel ball casting medium-frequency electric furnace smelting system, the chromium-free steel ball casting medium-frequency electric furnace smelting system comprising:

[0009] A medium frequency electric furnace, a condensing tank and a cold water tank, wherein the medium frequency electric furnace comprises a medium frequency electric furnace body and a furnace frame, wherein the medium frequency electric furnace body is located at the upper end of the furnace frame, a heating cavity is formed inside the medium frequency electric furnace body, and an electromagnetic induction heating component is installed inside the heating cavity;

[0010] An insulating ring plate lined cooling pipe is arranged inside the medium frequency electric furnace body, and a water inlet nozzle and a drain nozzle are respectively arranged at the upper end of the insulating ring plate lined cooling pipe. One end of the water inlet nozzle is connected to the water inlet pipe, and a water pump is installed on the water inlet pipe, and the other end of the water inlet pipe is connected to the inside of the cold water tank; one end of the drain nozzle is connected to the drain pipe, and one end of the drain pipe is connected to the upper end of the condensing tank;

[0011] An exhaust nozzle is also installed at one side of the upper end of the heating chamber, one end of the exhaust nozzle is connected to the exhaust pipe, one end of the exhaust pipe is connected to the heat exchange tank, the outlet end of the heat exchange tank is connected to the fan, and the outlet end of the fan is connected to the lower end of the condensation tank; a refrigeration mechanism is installed inside the condensation tank.

[0012] As a further solution of the present invention: the electromagnetic induction heating component includes a yoke and an inductor, the inner wall of the heating chamber is equipped with a yoke in a spiral ring shape, the outer side of the yoke is provided with an inductor, the outer side of the inductor is arranged with a mica board, and the mica board is connected and fixed to the outer wall of the furnace frame by a locking assembly.

[0013] As a further solution of the present invention: the locking assembly includes an insulating block and a yoke fixing bolt, one end of the yoke fixing bolt is provided with an insulating block, and the insulating block is pressed tightly against the outside of the mica board; the other end of the yoke fixing bolt passes through the inner wall of the furnace body frame and the end part is locked and fixed by a nut.

[0014] As a further solution of the present invention: a heat exchange tube is installed inside the heat exchange tank, and the heat exchange tube is distributed in an overlapping Π shape inside the heat exchange tank. One end of the heat exchange tube is connected to one end of the exhaust pipe, and the other end of the heat exchange tube is connected to the inlet position of the fan; at the same time, an air inlet and an air outlet are respectively opened on both sides of the upper end of the heat exchange tank.

[0015] As a further solution of the present invention: an exhaust port is opened in the middle position of the upper end of the condensation tank, and the refrigeration mechanism is located at the exhaust port; a heat dissipation material layer is filled in the middle position of the interior of the condensation tank, and the exhaust pipe is connected to the air distribution pipe on the part extending into the interior of the condensation tank, and the air distribution pipe is located at the lower end of the heat dissipation material layer, and the air distribution nozzles are installed on the air distribution pipe in a linear arrangement; the drain pipe is connected to the water distribution pipe on the part extending into the interior of the condensation tank, and the water distribution pipe is located at the upper end of the heat dissipation material layer, and the water distribution nozzles are installed on the water distribution pipe in a linear arrangement.

[0016] As a further solution of the present invention: the refrigeration mechanism includes a reduction gear box, fan blades and a servo motor, the servo motor is located outside the condensation tank, the output end of the servo motor is provided with an output shaft, one end of the output shaft extends into the reduction gear box, the reduction gear box is mounted and fixed on a bracket, and the bracket is arranged at the upper end of the condensation tank; the upper end of the reduction gear box is provided with a rotating shaft, the top end of the rotating shaft is installed with fan blades, and the fan blades are located at the exhaust port.

[0017] As a further solution of the present invention: a second bevel gear is provided on the portion of the output shaft extending into the reduction box, a first bevel gear is installed on the portion of the lower end of the rotating shaft located inside the reduction box, and the outer side of the first bevel gear is meshed with the outer side of the second bevel gear.

[0018] The production method of the above-mentioned chromium-free steel ball casting medium-frequency electric furnace smelting system comprises the following steps:

[0019] S1. When melting steel balls, after the steel balls are put into the heating chamber, a high-voltage DC power supply is connected to the electromagnetic induction heating assembly to realize electromagnetic induction heating of the steel balls put into the heating chamber to melt the steel balls; during the melting process, the insulating ring plate lined cooling pipe is used to heat the medium frequency furnace to melt the steel balls and realize water cooling of the high-temperature medium frequency furnace body;

[0020] S2. After heat exchange, the heated solution flows from the inside of the cooling pipe lined with the insulating ring plate to the position of the drain nozzle and is discharged into the condenser; at the same time, the fan is started to drain and discharge the high-temperature exhaust gas generated during smelting in the heating chamber through the exhaust nozzle position, and the high-temperature exhaust gas enters the heat exchange tank through the exhaust pipe, and the first heat exchange and refrigeration is realized inside the heat exchange tank; then it is drained to the lower end position of the condenser through the exhaust pipe, and finally the high-temperature exhaust air is lifted inside the condenser;

[0021] At this time, starting the refrigeration mechanism installed inside the condensation tank can atomize and cool the high-temperature waste liquid entering the condensation tank through the drain pipe, and then fully contact and mix it with the waste gas rising from the exhaust pipe, so as to neutralize the discharged waste gas to meet environmental protection emission standards and cool the waste gas at the same time, so that harmful substances in the waste gas, such as metal ash, are deposited inside the condensation tank.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] Compared with the current medium frequency electric furnace for smelting chrome-free steel balls, the chrome-free steel ball casting medium frequency electric furnace smelting system has the following advantages:

[0024] First, a condensing tank is arranged outside the electric furnace body, and when the medium-frequency electric furnace is in operation for smelting, the heat exchange hot water discharged from the cooling pipe lined with the insulating ring plate inside the furnace body is atomized and transported to the inside of the condensing tank, and the high-temperature waste smoke generated at the furnace mouth is also transported to the inside of the condensing tank at the same time; by starting the refrigeration mechanism installed inside the condensing tank, the high-temperature waste liquid entering the condensing tank through the drain pipe can be atomized and cooled, and then fully contacted and mixed with the waste gas lifted from the exhaust pipe, so that the discharged waste gas can be neutralized to meet the environmental protection standard emission, and the waste gas can be cooled at the same time, so that harmful substances in the waste gas, such as metal ash, are deposited inside the condensing tank; in this way, the waste gas can be purified and cooled, and the cooling medium can be refrigerated and recycled, achieving multiple goals at one stroke;

[0025] 2. Installing a water retainer inside the condensation tank can prevent most of the solution from being drained away; at the same time, installing the servo motor that is connected to the power supply for outputting kinetic energy on the outside of the condensation tank can effectively prevent the rising water vapor at the upper end of the condensation tank from corroding the running servo motor and causing leakage, thereby shortening the service life of the servo motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention.

[0027] Figure 1 The present invention is a schematic structural diagram of a medium-frequency electric furnace smelting system for casting chromium-free steel balls according to an embodiment of the present invention.

[0028] Figure 2 This is a schematic diagram of the internal structure of a heat exchange tank of a medium-frequency electric furnace smelting system for casting chromium-free steel balls according to an embodiment of the present invention.

[0029] Figure 3 The present invention is a schematic structural diagram of a reduction gearbox in a medium-frequency electric furnace smelting system for casting chromium-free steel balls according to an embodiment of the present invention.

[0030] In the figure: 1-metal component, 2-short-circuit ring, 3-water inlet nozzle, 4-water inlet pipe, 5-refractory brick, 6-furnace frame, 7-epoxy plate, 8-water pump, 9-yoke fixing bolt, 10-mica plate, 11-inductor, 12-yoke, 13-insulating block, 14-exhaust nozzle, 15-drain nozzle, 16-drain pipe, 17-exhaust pipe, 18-heat exchange tank, 19-fan, 20-condensation tank, 21-exhaust port, 22-fan blade, 23-rotating shaft, 24-reduction gear box, 25-output shaft, 26-servo motor, 27-bracket, 28-water retainer, 29-water distribution pipe, 30-water distribution nozzle, 31-heat dissipation material layer, 32-air distribution pipe, 33-air distribution nozzle, 34-cold water tank, 35-heat exchange tube, 36-first bevel gear, 37-second bevel gear. DETAILED DESCRIPTION

[0031] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0032] Example

[0033] See also Figure 1 , a chromium-free steel ball casting medium-frequency electric furnace smelting system provided in an embodiment of the present invention, the chromium-free steel ball casting medium-frequency electric furnace smelting system comprises:

[0034] A medium frequency electric furnace, a condensing tank 20 and a cold water tank 34, wherein the medium frequency electric furnace comprises a medium frequency electric furnace body and a furnace frame 6, wherein the medium frequency electric furnace body is located at the upper end of the furnace frame 6, wherein a heating chamber is formed inside the medium frequency electric furnace body, wherein an electromagnetic induction heating component is installed inside the heating chamber; when melting steel balls, after the steel balls are put into the heating chamber, a high voltage DC power supply is connected to the electromagnetic induction heating component to realize electromagnetic induction heating of the steel balls put into the heating chamber, thereby melting the steel balls;

[0035] Among them, an insulating ring plate lined cooling pipe is arranged inside the medium frequency electric furnace body, and a water inlet nozzle 3 and a drain nozzle 15 are respectively arranged at the upper end of the insulating ring plate lined cooling pipe. One end of the water inlet nozzle 3 is connected to the water inlet pipe 4, and a water pump 8 is installed on the water inlet pipe 4, and the other end of the water inlet pipe 4 is connected to the inside of the cold water tank 34; one end of the drain nozzle 15 is connected to the drain pipe 16, and one end of the drain pipe 16 is connected to the upper end of the condensation tank 20;

[0036] The insulating ring plate lining cooling pipe is used to achieve water cooling of the high-temperature medium-frequency electric furnace body when the medium-frequency electric furnace heats and melts steel balls; the heating solution after heat exchange flows from the inside of the insulating ring plate lining cooling pipe to the position of the drain nozzle 15 for discharge, and then flows through the connected drain pipe 16 to the inside of the condensation tank 20; after the heating solution enters the condensation tank 20, it falls into the cold water tank 34 for temporary storage after refrigeration and cooling, and then the water pump 8 is started to create water pressure in the water inlet pipe 4, which is used to transport the cooled solution in the cold water tank 34 through the position of the water inlet nozzle 3 to the inside of the insulating ring plate lining cooling pipe for circulation, so as to achieve a circulating heat exchange and refrigeration effect for the heating solution;

[0037] An exhaust nozzle 14 is also installed at one side of the upper end of the heating chamber, one end of the exhaust nozzle 14 is connected to an exhaust pipe 17, one end of the exhaust pipe 17 is connected to a heat exchange tank 18, the outlet end of the heat exchange tank 18 is connected to a fan 19, and the outlet end of the fan 19 is connected to the lower end of the condensation tank 20; a refrigeration mechanism is installed inside the condensation tank 20;

[0038] When the steel ball is put into the heating chamber, a high-voltage DC power supply is connected to the electromagnetic induction heating component to realize electromagnetic induction heating of the steel ball put into the heating chamber, and the steel ball is melted; the fan 19 is started, and the fan 19 creates a vacuum negative pressure inside the exhaust pipe 17, and then the high-temperature exhaust gas generated during the melting inside the heating chamber is drained out through the exhaust nozzle 14, and the high-temperature exhaust gas enters the heat exchange tank 18 through the exhaust pipe 17, and the first heat exchange and refrigeration is realized inside the heat exchange tank 18; then it is drained to the lower end position inside the condensation tank 20 through the exhaust pipe 17, and finally the high-temperature exhaust air is lifted inside the condensation tank 20;

[0039] The refrigeration mechanism installed inside the condensation tank 20 can atomize and cool the high-temperature waste liquid entering the condensation tank 20 through the drain pipe 16, and then fully contact and mix it with the waste gas lifted from the exhaust pipe 17, so that the discharged waste gas can be neutralized to meet the environmental protection standard, and the waste gas can be cooled at the same time, so that harmful substances in the waste gas, such as metal ash, can be deposited inside the condensation tank 20; in this way, the waste gas can be purified and cooled while the cooling medium can be cooled by heat exchange, achieving multiple goals at one stroke;

[0040] See also Figure 1In one embodiment of the present invention, the electromagnetic induction heating assembly inside the heating chamber includes a yoke 12 and an inductor 11. The yoke 12 is installed on the inner wall of the heating chamber in a spiral ring shape. The inductor 11 is arranged on the outer side of the yoke 12. The inductor 11 and the yoke 12 are connected to a power supply to perform electromagnetic induction heating, so as to heat the material placed in the heating chamber. A mica board 10 is arranged on the outer side of the inductor 11, and the mica board 10 is connected and fixed to the outer wall of the furnace frame 7 by a locking assembly.

[0041] Specifically, the locking assembly includes an insulating block 13 and a yoke fixing bolt 9, one end of the yoke fixing bolt 9 is provided with an insulating block 13, and the insulating block 13 is pressed and fitted on the outside of the mica board 10; the other end of the yoke fixing bolt 9 passes through the inner wall of the furnace frame 7, and the end portion is locked and fixed by a nut;

[0042] In the embodiment of the present invention, when the locking assembly is used to achieve compression and fixation at the outer position of the yoke 12, after the insulating block 13 is aligned and fitted to the outer side of the mica board 10, the yoke fixing bolt 9 is rotated to cause the rotating yoke fixing bolt 9 to move and push the insulating block 13 to slide and move, and after the outer side of the mica board 10 is compressed, the yoke fixing bolt 9 is locked and fixed to the outer side of the furnace frame 6 by a nut at the other end of the yoke fixing bolt 9;

[0043] See also Figure 1 In one embodiment of the present invention, refractory bricks 5 are symmetrically installed on both sides of the lower end of the heating chamber, and the installed refractory bricks 5 are used to improve the thermal insulation and fireproof performance of the entire heating chamber; an epoxy plate 7 is provided at the bottom of the heating chamber, and the epoxy plate 7 can not only improve the fireproof and heat insulation performance of the entire heating chamber, but also play an insulating role, which is used to avoid leakage when the yoke 12 and the inductor 11 are electromagnetically heated after power is turned on;

[0044] See also Figure 1 In one embodiment of the present invention, a furnace mouth is formed at the upper end of the heating chamber, a metal component 1 is arranged outside the furnace mouth, and a short-circuit ring 2 is provided between the metal component 1 and the outer wall of the furnace frame 6; the metal component 1, the short-circuit ring 2 and the furnace frame 6 are locked and fixed by furnace mouth fixing bolts;

[0045] The metal component 1 is arranged at the upper end of the induction furnace to enhance the overall strength of the furnace mouth; at the same time, a short-circuit ring 2 is arranged between the metal component 1 and the outer wall of the furnace frame 6. The arranged short-circuit ring 2 is a circle wound by a copper tube and is placed between the metal component 1 and the inductor 11. The function of the short-circuit ring 2 is to consume the magnetic field at the end of the inductor 11 and return part of the magnetic field, thereby blocking the magnetic field from heating the metal component 1;

[0046] See also Figure 2In one embodiment of the present invention, a heat exchange tube 35 is installed inside the heat exchange tank 18. The heat exchange tube 35 is distributed in an overlapping Π shape inside the heat exchange tank 18. One end of the heat exchange tube 35 is connected to one end of the exhaust pipe 17, and the other end of the heat exchange tube 35 is connected to the inlet position of the fan 19. At the same time, an air inlet and an air outlet are respectively opened on both sides of the upper end of the heat exchange tank 18;

[0047] After the exhaust gas enters the heat exchange tank 18 through the exhaust pipe 17, it then circulates back and forth inside the heat exchange tube 35 installed inside the heat exchange tank 18; during the circulation process, the external natural wind passes through the inside of the heat exchange tank 18 and exchanges heat with the heat exchange tube 35, thereby achieving the initial heat exchange and cooling of the hot air circulating inside the heat exchange tube 35;

[0048] See also Figure 1 In one embodiment of the present invention, an exhaust port 21 is provided at the middle position of the upper end of the condensing tank 20, and the refrigeration mechanism is located at the exhaust port 21; a heat dissipation material layer 31 is filled at the middle position inside the condensing tank 20, and the exhaust pipe 17 is connected to an air distribution pipe 32 on the part extending into the interior of the condensing tank 20, and the air distribution pipe 32 is located at the lower end of the heat dissipation material layer 31, and air distribution nozzles 33 are installed on the air distribution pipe 32 in a linear arrangement; the drain pipe 16 is connected to a water distribution pipe 29 on the part extending into the interior of the condensing tank 20, and the water distribution pipe 29 is located at the upper end of the heat dissipation material layer 31, and water distribution nozzles 30 are installed on the water distribution pipe 29 in a linear arrangement;

[0049] In the embodiment of the present invention, after the hot solution discharged through the drain pipe 16 enters the interior of the condensation tank 20, it is sprayed out through the water distribution nozzle 30 installed on the water distribution pipe 29, and falls into the heat dissipation material layer 31 by the gravity of the solution itself, and penetrates into the heat dissipation material layer 31 to achieve primary refrigeration; at this time, the refrigeration mechanism is started, and the operation of the refrigeration mechanism causes an upward vacuum negative pressure inside the condensation tank 20, thereby causing the hot air to flow. During the flow of the hot air, the atomized solution can be cooled for a second time, and because the air can flow quickly, the inside of the condensation tank 20 can be quickly released to improve the refrigeration effect;

[0050] In addition, the exhaust gas entering the condensation tank 20 through the exhaust pipe 17 is sprayed out through the air distribution nozzle 33 installed on the air distribution pipe 32, and is lifted inside the condensation tank 20. During the lifting process of the exhaust gas, the filled heat dissipation material layer 31 is used to filter and intercept the exhaust gas to achieve physical purification. At the same time, the solution dripping through the heat dissipation material layer 31 can be neutralized with the exhaust gas to achieve chemical purification; thereby ensuring the purification effect of the exhaust gas and meeting the environmental protection standards for later emissions;

[0051] Specifically, the refrigeration mechanism includes a reduction box 24, a fan blade 22 and a servo motor 26. The servo motor 26 is located outside the condensing tank 20. The output end of the servo motor 26 is provided with an output shaft 25. One end of the output shaft 25 extends into the reduction box 24. The reduction box 24 is fixed on a bracket 27. The bracket 27 is arranged at the upper end of the condensing tank 20. The upper end of the reduction box 24 is provided with a rotating shaft 23. The top of the rotating shaft 23 is provided with a fan blade 22. The fan blade 22 is located at the exhaust port 21. In addition, a water retainer 28 is also provided on the part between the water distribution pipe 29 and the bracket 27 inside the condensing tank 20.

[0052] In the embodiment of the present invention, when the refrigeration mechanism is started to quickly dissipate heat from the upper end of the condensing tank 20, the servo motor 26 is started, and the servo motor 26 outputs kinetic energy to drive the output shaft 25 to rotate. When the output shaft 25 rotates, the fan blade 22 installed at the top of the rotating shaft 23 is driven to rotate by the reduction gear box 24, so as to quickly exhaust and dissipate heat from the exhaust port 21; the water retainer 28 is provided to prevent most of the solution from being drained out; and the servo motor 26 connected to the power supply for outputting kinetic energy is installed on the outside of the condensing tank 20, which can effectively prevent the water vapor at the upper end of the condensing tank 20 from corroding the running servo motor 26 and causing leakage, thereby shortening the service life of the servo motor 26;

[0053] See also Figure 3 In the embodiment of the present invention, the output shaft 25 is provided with a second bevel gear 37 on the portion extending into the reduction box 24, and the first bevel gear 36 is installed on the portion of the lower end of the rotating shaft 23 located inside the reduction box 24, and the outer side of the first bevel gear 36 is meshed with the outer side of the second bevel gear 37;

[0054] In the embodiment of the present invention, when the servo motor 26 outputs kinetic energy to drive the output shaft 25 to rotate, the second bevel gear 37 installed on the output shaft 25 is driven to rotate. Since the outer side of the second bevel gear 37 is meshed with the outer side of the first bevel gear 36, when the second bevel gear 37 rotates, the first bevel gear 36 is driven to rotate, and then the rotating shaft 23 installed at the axial center position of the first bevel gear 36 is driven to rotate;

[0055] The production method of the above-mentioned chromium-free steel ball casting medium-frequency electric furnace smelting system comprises the following steps:

[0056] S1. When melting steel balls, after the steel balls are put into the heating chamber, a high-voltage DC power supply is connected to the electromagnetic induction heating assembly to realize electromagnetic induction heating of the steel balls put into the heating chamber to melt the steel balls; during the melting process, the insulating ring plate lined cooling pipe is used to heat the medium frequency furnace to melt the steel balls and realize water cooling of the high-temperature medium frequency furnace body;

[0057] S2, the heated solution after heat exchange flows from the inside of the cooling pipe lined with the insulating ring plate to the position of the drain nozzle 15 and is discharged into the condenser 20; at the same time, the fan 19 is started, and the fan 19 creates a vacuum negative pressure inside the exhaust pipe 17, and then the high-temperature exhaust gas generated during smelting inside the heating chamber is drained and discharged through the exhaust nozzle 14 position, and the high-temperature exhaust gas enters the heat exchange tank 18 through the exhaust pipe 17, and the first heat exchange and refrigeration is realized inside the heat exchange tank 18; then it is drained to the lower end position inside the condenser 20 through the exhaust pipe 17, and finally the high-temperature exhaust air is lifted inside the condenser 20;

[0058] At this time, the refrigeration mechanism installed inside the condensation tank 20 is started to atomize and cool the high-temperature waste liquid entering the condensation tank 20 through the drain pipe 16, and then fully contact and mix it with the waste gas lifted from the exhaust pipe 17, so as to neutralize the discharged waste gas to meet the environmental protection standard, and at the same time, the waste gas can be cooled, so that harmful substances in the waste gas, such as metal ash, are deposited inside the condensation tank 20;

[0059] In the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0060] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A chromium-free steel ball casting medium frequency electric furnace smelting system, comprising: A medium frequency electric furnace, a condenser tank (20) and a cold water tank (34); characterized in that: The medium frequency electric furnace comprises a medium frequency electric furnace body and a furnace frame (6), the medium frequency electric furnace body is located at the upper end of the furnace frame (6), a heating cavity is formed inside the medium frequency electric furnace body, and an electromagnetic induction heating component is installed inside the heating cavity; An insulating ring plate lined cooling pipe is arranged inside the medium frequency electric furnace body, and a water inlet nozzle (3) and a water drain nozzle (15) are respectively arranged at the upper end of the insulating ring plate lined cooling pipe. One end of the water inlet nozzle (3) is connected to a water inlet pipe (4), a water pump (8) is installed on the water inlet pipe (4), and the other end of the water inlet pipe (4) is connected to the inside of a cold water tank (34); one end of the water drain nozzle (15) is connected to a drain pipe (16), and one end of the drain pipe (16) is connected to the upper end of the inside of a condensing tank (20); An exhaust nozzle (14) is installed at one side of the upper end of the heating chamber, one end of the exhaust nozzle (14) is connected to an exhaust pipe (17), one end of the exhaust pipe (17) is connected to a heat exchange tank (18), the outlet end of the heat exchange tank (18) is connected to a fan (19), and the outlet end of the fan (19) is connected to the lower end of the interior of a condensation tank (20); A refrigeration mechanism is installed inside the condensation tank (20).

2. The chromium-free steel ball casting medium frequency electric furnace smelting system according to claim 1 is characterized in that: The electromagnetic induction heating component comprises a magnetic yoke (12) and an inductor (11); the magnetic yoke (12) is installed on the inner wall of the heating chamber in a spiral ring-shaped distribution; the inductor (11) is arranged on the outer side of the magnetic yoke (12); a mica plate (10) is arranged on the outer side of the inductor (11); the mica plate (10) is connected and fixed to the outer wall of the furnace frame (7) by a locking component.

3. The chromium-free steel ball casting medium frequency electric furnace smelting system according to claim 2 is characterized in that: The locking assembly comprises an insulating block (13) and a yoke fixing bolt (9); one end of the yoke fixing bolt (9) is provided with an insulating block (13), and the insulating block (13) is pressed tightly against the outside of the mica board (10); the other end of the yoke fixing bolt (9) passes through the inner wall of the furnace frame (6), and the end portion is locked and fixed by a nut.

4. The chromium-free steel ball casting medium frequency electric furnace smelting system according to claim 1 is characterized in that: A heat exchange tube (35) is installed inside the heat exchange tank (18). The heat exchange tube (35) is distributed in an overlapping Π shape inside the heat exchange tank (18). One end of the heat exchange tube (35) is connected to one end of the exhaust pipe (17), and the other end of the heat exchange tube (35) is connected to the inlet position of the fan (19). At the same time, an air inlet and an air outlet are respectively opened on both sides of the upper end of the heat exchange tank (18).

5. The chromium-free steel ball casting medium frequency electric furnace smelting system according to claim 1 is characterized in that: An exhaust port (21) is provided at the middle position of the upper end of the condensing tank (20), and the refrigeration mechanism is located at the exhaust port (21); a heat dissipation material layer (31) is filled at the middle position inside the condensing tank (20); the exhaust pipe (17) extends into the part inside the condensing tank (20) and is connected to an air distribution pipe (32); the air distribution pipe (32) is located at the lower end of the heat dissipation material layer (31), and air distribution nozzles (33) are installed on the air distribution pipe (32) in a linear arrangement; the drain pipe (16) extends into the part inside the condensing tank (20) and is connected to a water distribution pipe (29); the water distribution pipe (29) is located at the upper end of the heat dissipation material layer (31), and water distribution nozzles (30) are installed on the water distribution pipe (29) in a linear arrangement.

6. The chromium-free steel ball casting medium frequency electric furnace smelting system according to claim 5 is characterized by: The refrigeration mechanism comprises a reduction box (24), a fan blade (22) and a servo motor (26); the servo motor (26) is located outside the condensing tank (20); an output shaft (25) is provided at the output end of the servo motor (26); one end of the output shaft (25) extends into the reduction box (24); the reduction box (24) is fixed on a bracket (27); the bracket (27) is arranged at the upper end of the condensing tank (20); a rotating shaft (23) is provided at the upper end of the reduction box (24); a fan blade (22) is installed at the top end of the rotating shaft (23); and the fan blade (22) is located at the exhaust port (21).

7. The chromium-free steel ball casting medium frequency electric furnace smelting system according to claim 6 is characterized by: The part of the output shaft (25) extending into the reduction box (24) is provided with a second bevel gear (37), and the part of the lower end of the rotating shaft (23) located inside the reduction box (24) is provided with a first bevel gear (36), and the outer side of the first bevel gear (36) is meshed with the outer side of the second bevel gear (37).

8. A method for producing a chromium-free steel ball casting medium frequency electric furnace smelting system as described in any of claims 1 to 7, characterized in that: The following steps are involved: S1. When melting steel balls, after the steel balls are put into the heating chamber, a high-voltage DC power supply is connected to the electromagnetic induction heating assembly to realize electromagnetic induction heating of the steel balls put into the heating chamber to melt the steel balls; during the melting process, the insulating ring plate lined cooling pipe is used to heat the medium frequency furnace to melt the steel balls and realize water cooling of the high-temperature medium frequency furnace body; S2, after heat exchange, the heated solution flows from the inside of the cooling pipe lined with the insulating ring plate to the position of the drain nozzle (15) and is discharged, and then enters the inside of the condenser (20); at the same time, the fan (19) is started to drain and discharge the high-temperature exhaust gas generated during smelting in the heating chamber through the exhaust nozzle (14), and the high-temperature exhaust gas enters the inside of the heat exchange tank (18) through the exhaust pipe (17), and the first heat exchange and refrigeration is realized in the heat exchange tank (18); then, it is drained to the lower end position of the inside of the condenser (20) through the exhaust pipe (17), and finally the high-temperature exhaust air is lifted in the inside of the condenser (20); At this time, the refrigeration mechanism installed inside the condensation tank (20) can be started to atomize and cool the high-temperature waste liquid entering the condensation tank (20) through the drain pipe (16), and then fully contact and mix it with the waste gas rising from the exhaust pipe (17), so as to neutralize the discharged waste gas to meet the environmental protection emission standards, and at the same time cool the waste gas, so that harmful substances in the waste gas, such as metal ash, are deposited inside the condensation tank (20).

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