Decarburization heat treatment furnace and decarburization process

Abstract

The invention provides a decarburization heat treatment furnace and a decarburization process, and belongs to the technical field of cast iron heat treatment. Comprising a heat treatment furnace body, a mounting guide rail is arranged on the inner wall of the heat treatment furnace body, a mechanical arm is slidably mounted on the mounting guide rail, a material frame is arranged on one side of the mounting guide rail, a water storage tank is arranged on the inner wall of the inner side of the heat treatment furnace body, and a water injection pump is connected to one side of the water storage tank; by arranging the decarburization assembly, sinter generated by partial insufficient reaction with a decarburization agent can be polished and removed, carbon powder separated from the surface of cast iron by reaction with the decarburization agent is separated from the cast iron, so that the decarburization agent can be in full contact reaction with the white-core malleable cast iron, and the white-core malleable cast iron is completely decarburized; the mechanical property and weldability of the white-core malleable cast iron are improved, meanwhile, the scrapping waste of decarburized castings is reduced, and the production cost is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of cast iron heat treatment, in particular to a decarburization heat treatment furnace and a decarburization process. Background Art

[0002] Whiteheart malleable cast iron is a kind of malleable cast iron with silvery white cross section, thick decarburized powder on the outer edge, uneven surface and inner structure. The outer layer of cast iron is all ferrite, the core has pearlite and a small amount of flocculent graphite, and even residual free cementite. Whiteheart malleable cast iron has good mechanical properties and weldability.

[0003] In the prior art, a decarburizer is added to a sealed annealing furnace to carry out a heat treatment decarburization reaction on whitehearth malleable cast iron, thereby improving the decarburization degree of the whitehearth malleable cast iron and making it have stronger mechanical properties. However, when the decarburizer is directly added to the annealing furnace, the decarburizer cannot fully contact and react with the whitehearth malleable cast iron, which easily leads to incomplete decarburization and affects the mechanical properties and weldability of the whitehearth malleable cast iron. Insufficient contact and reaction between the decarburizer and the whitehearth malleable cast iron easily leads to the components in the decarburizer adhering to the surface of the heated whitehearth malleable cast iron, producing incomplete sintering products, resulting in the production of defective products, and inconvenient cleaning.

[0004] At the same time, some of the carbon powder released when whiteheart malleable cast iron reacts with the decarburizer will adhere to the surface of the whiteheart malleable cast iron, and the carbon powder needs to be manually blown away after the reaction is completed. The carbon powder scatters and splashes in the reactor, making it inconvenient to collect and clean it, and cleaning requires additional manpower and material resources. Therefore, the present application provides a decarburization heat treatment furnace and a decarburization process to meet the needs. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a decarburization heat treatment furnace and a decarburization process to solve the problem that the existing decarburizer cannot continue to fully contact and react with whiteheart malleable cast iron, which easily leads to incomplete decarburization, produces incomplete sintered materials, causes the production of defective products, and is inconvenient to clean. At the same time, the carbon powder released by the reaction of whiteheart malleable cast iron with the decarburizer will partially adhere to the surface of the whiteheart malleable cast iron, and the carbon powder needs to be manually blown off after the reaction is completed, which is inconvenient to collect and clean, and the cleaning requires additional manpower and material resources.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0007] A decarbonization heat treatment furnace comprises a heat treatment furnace body, an installation rail is provided on the inner wall of the heat treatment furnace body, a mechanical arm is slidably installed on the installation rail, a material rack is provided on one side of the installation rail, a water storage tank is provided on the inner wall of the inner side of the heat treatment furnace body, a water injection pump is connected to one side of the water storage tank, a temperature sensor is provided on the top of the inner wall of the box body, and also comprises a heating component, the heating component is provided on the inner wall of the heat treatment furnace body, the heating component is used to heat whiteheart malleable cast iron, a decarbonization component, the decarbonization component is provided on the inner wall of the heat treatment furnace body, the decarbonization component decarbonizes the heated whiteheart malleable cast iron, and a driving component, the driving component is installed on the inner wall of the heat treatment furnace body, the driving component is used to reciprocately scrape the decarbonization component to separate walnut sand and carbon powder, and at the same time stir and mix the walnut sand and carbon powder on one side of the filling port.

[0008] Optionally, an insulation board is provided on the inner wall of the heat treatment furnace body, the material rack is divided into a blank area and a finished product area, the water storage tank is installed on the side of the box door close to the heat treatment furnace body, the heating assembly is installed on the left side of the mounting guide rail, the decarbonization assembly is installed on the right side of the mounting guide rail, the driving assembly is installed at the bottom of the decarbonization assembly, and the temperature sensor is installed directly above the heating assembly.

[0009] Optionally, the heating assembly includes a heating furnace, which is installed on the bottom surface of the inner wall of the heat treatment furnace body, and a combustion nozzle is symmetrically installed on the inner side of the heating furnace, and the combustion nozzle runs through the heating furnace. The tail end of the combustion nozzle is connected to a gas pipeline, and the tail end of the gas pipeline is connected to a natural gas filling tank. Heat conduction boxes are symmetrically installed on both sides of the heating furnace, and the heat conduction boxes are interconnected with a water injection pump through a pipeline. Steam generators are connected between the heat conduction boxes through a pipeline, and the steam generator is interconnected with a drive assembly through a pipeline.

[0010] Optionally, a material placement rack is provided on the inner side of the heating furnace, an opening and closing sealing plate is provided on one side of the heating furnace, the combustion nozzle is installed at the center of the heating furnace, the heat conduction box is made of pure copper material, and the steam generator is installed below the heating furnace.

[0011] Optionally, the decarburization component includes a decarburization furnace, which is installed on the bottom surface of the inner wall of the heat treatment furnace body, and a mounting frame is symmetrically installed on the inner side of the decarburization furnace, on which a turntable is rotatably installed, and injection heads are installed on the turntable at equal angles, and the tail ends of the injection heads are connected to the mounting frame and the inner wall pipeline of the turntable, and the mounting frame is connected to a connecting pipe 1, and the tail end of the connecting pipe is connected to a sludge pump 1, and the sludge pump 1 is connected to a mixing box through a pipeline, and the pipeline is installed through the top surface of the mixing box, and the mixing box is installed on the outer wall of the decarburization furnace, and the top of the mixing box is connected to a decarburizer storage box through a pipeline, and the decarburizer storage box is installed on the outer wall of the decarburization furnace.

[0012] Optionally, a stirring rod is rotatably installed at the bottom of the inner wall of the mixing box, and the input shaft of the stirring rod is installed through the bottom of the mixing box; a separation box is connected to the bottom of the decarburization furnace, and the decarburization furnace and the separation box are interconnected through an internal slot; one side of the separation box is connected through a connecting pipe 2, and the tail end of the connecting pipe 2 is connected to a sludge pump 2, and the sludge pump 2 and the mixing box are interconnected through a connecting pipe 3; a mounting box is connected to the bottom of the separation box, a carbon scraping ring is nested on the inner side of the mounting box near the top, a magnetic column is nested on the inner side of the carbon scraping ring, and the magnetic column is installed through the bottom surface of the separation box, and the bottom of the magnetic column is connected to the driving assembly; one side of the mounting box is connected to a decarburization collection box, and the decarburization collection box is installed on the bottom surface of the inner wall of the heat treatment furnace body.

[0013] Optionally, a material placement rack is provided on the inner side of the decarbonization furnace, an opening and closing sealing plate is provided on one side of the decarbonization furnace, the connecting pipe one uses a one-to-two branch pipe, the driving direction of the sludge pump one is to drive and transport from the mixing box to the decarbonization furnace, a rubber scraper is provided on the inner side of the carbon scraping ring, the driving direction of the sludge pump two is to drive and transport from the separation box to the mixing box, the surface of the magnetic suction column is provided with adsorption scales, and the decarbonization collection box uses wear-resistant material.

[0014] Optionally, the driving assembly includes gear 1, which is installed on the input shaft of the stirring rod, and gear 1 is meshed with gear 2. Gear 2 is rotatably installed at the bottom of the mixing box, and a helical gear group is connected to the transmission shaft of gear 2. The other end of the helical gear group is meshed with the helical gear. The input end of the helical gear is connected to a crank wheel, and the input end of the crank wheel is connected to a crank piston. The end of the crank piston is connected to a steam engine module, and the steam engine module is interconnected with a steam generator through a pipeline. A connecting rod is rotatably installed on the end of the crank wheel, and the end of the connecting rod is rotatably connected to a magnetic column.

[0015] Optionally, the helical gear set uses wear-resistant material, the crank piston and crankwheel are coaxially installed, and the steam engine module is provided with a water separator.

[0016] The present application also provides a decarburization process for a decarburization heat treatment furnace, wherein the decarburization process steps are as follows:

[0017] S1, add water into the water tank, start the water injection pump, and the water enters the heat transfer box;

[0018] S2, the robotic arm grabs the cast iron blank on the material rack;

[0019] S3, the robot arm places the cast iron blank on the material placement rack of the heating furnace, opens the valve of the natural gas filling tank, ignites the combustion nozzle, closes the opening and closing sealing plate of the heating furnace, and the temperature sensor records the temperature;

[0020] S4. After the temperature is reached, the opening and closing sealing plate of the heating furnace is opened, and the mechanical arm clamps the heated cast iron out and places it on the material placement rack of the decarburization furnace;

[0021] S5. Close the opening and closing sealing plate of the decarburization furnace, and the operator adds decarburization agent into the decarburization agent storage tank;

[0022] S6, starting the sludge pump 1 and the sludge pump 2, so that the mixture of walnut sand and decarburizer contacts and reacts with the heated cast iron;

[0023] S7, sealing the decarburization furnace;

[0024] S8, heat treatment heating process: heating the cast iron in the heating furnace for 10 to 24 hours, and the temperature after heating is 950°C to 1100°C; insulation process: maintaining the heated temperature inside the decarburization furnace for 50 to 85 hours; cooling process: reducing the temperature inside the decarburization furnace to below 650°C;

[0025] S9, the product is released.

[0026] Compared with the prior art, the present invention has at least the following beneficial effects:

[0027] In the above scheme, a decarburization component is provided, and a sludge pump extracts the walnut sand and decarburizer mixture in the mixing box, and then sprays it out from the injection head to contact the heated cast iron surface, and generates a contact force in the opposite direction at the injection head to rotate the turntable, so that the walnut sand and decarburizer mixture can be evenly sprayed on the heated cast iron surface through the injection head, and the decarburizer contacts the heated cast iron, so that the cast iron quickly undergoes a decarburization reaction. At the same time, after the walnut sand is sprayed out from the injection head, the high-pressure fast-flow particles of the walnut sand contact and tumble and collide with the heated cast iron in the decarburization furnace, so that the sintered products produced by the local insufficient reaction can be polished and removed, and the carbon powder released from the cast iron surface by the reaction of the cast iron surface with the decarburizer is separated from the cast iron under the impact force of the walnut sand contacting the cast iron surface, so that the decarburizer can fully contact and react with the whiteheart malleable cast iron, and the whiteheart malleable cast iron is completely decarburized, thereby improving the mechanical properties and weldability of the whiteheart malleable cast iron, while reducing the scrapping waste of decarburized castings and reducing production costs.

[0028] By setting up a decarbonization component and a driving component, the magnetic column is driven by the operation of the crank piston to reciprocate vertically through the slot at the bottom of the separation box to adsorb the carbon powder in the mixture of walnut sand and carbon powder inside the separation box. The carbon powder is adsorbed on the adsorption scale grooves on the surface of the magnetic column, reducing the probability of carbon powder scattering during the magnetic column process. When the magnetic column moves downward, the surface of the magnetic column contacts the carbon scraper ring near the inner top position of the installation box to scrape off the carbon powder adsorbed on the surface, and the carbon powder falls from the installation box into the decarbonization collection box, which is convenient for operators to clean and transport, saving extra manpower and material resources, and the remaining walnut sand in the mixture of walnut sand and carbon powder is extracted by the second mud pump and remixed with the decarbonizer to decarbonize the white heart malleable cast iron, saving the decarbonization cost, and the walnut sand can be recycled, which is more in line with the standards of low-carbon production. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings, which are incorporated herein and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, further serve to explain the principles of the invention and to enable those skilled in the relevant art to make and use the invention.

[0030] Figure 1 It is a schematic diagram of the three-dimensional structure of a decarburization heat treatment furnace;

[0031] Figure 2 It is a schematic diagram of the three-dimensional structure of a decarburization heat treatment furnace;

[0032] Figure 3 It is a schematic diagram of the three-dimensional structure of the heat treatment furnace body;

[0033] Figure 4 It is a three-dimensional structural diagram of the installation position relationship of the robot arm, heating furnace and decarburization furnace;

[0034] Figure 5 is a schematic diagram of the three-dimensional structure of the heating component;

[0035] Figure 6 It is a schematic diagram of the three-dimensional structure of the decarburization component;

[0036] Figure 7 for Figure 6 A in the figure is an enlarged schematic diagram of the three-dimensional structure;

[0037] Figure 8 for Figure 6 A schematic diagram of the three-dimensional structure is enlarged at B in FIG.

[0038] Fig. 9 It is a schematic diagram of the three-dimensional structure of the installation box, the carbon scraping ring and the magnetic column;

[0039] Fig.10 It is a schematic diagram of the assembly three-dimensional structure of the decarburization component and the drive component;

[0040] Fig.11 is a schematic diagram of the three-dimensional structure of the drive component;

[0041] Fig.12 It is a top view of the assembled three-dimensional structure of the decarburization component and the drive component;

[0042] Fig.13 It is a schematic diagram of the three-dimensional structure of the helical gear set.

[0043] Reference numerals:

[0044] 1. Heat treatment furnace body; 2. Mounting rail; 3. Mechanical arm; 4. Material rack; 5. Water storage tank; 6. Water injection pump; 7. Heating assembly; 71. Heating furnace; 72. Combustion nozzle; 73. Gas pipeline; 74. Natural gas filling tank; 75. Heat transfer box; 76. Steam generator; 8. Decarbonization assembly; 81. Decarbonization furnace; 82. Mounting rack; 83. Turntable; 84. Injection head; 85. Connecting pipe 1; 86. Sediment pump 1; 87. Mixing box; 88. Decarbonization Carbon agent storage box; 89, stirring rod; 810, separation box; 811, connecting pipe 2; 812, sediment pump 2; 813, connecting pipe 3; 814, installation box; 815, carbon scraper ring; 816, magnetic column; 817, decarbonization collection box; 9, drive assembly; 91, gear 1; 92, gear 2; 93, bevel gear set; 94, bevel gear; 95, crank; 96, crank piston; 97, steam engine module; 98, connecting rod; 10, temperature sensor.

[0045] As shown in the figure, in order to clearly implement the structure of the embodiment of the present invention, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the present invention to the specific structure, device and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments. DETAILED DESCRIPTION

[0046] The following is a detailed description of a decarburization heat treatment furnace and a decarburization process provided by the present invention in conjunction with the accompanying drawings and specific embodiments. At the same time, it is explained here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art may also adopt other alternatives to implement some known technologies; and the accompanying drawings are only for a more specific description of the embodiments, and are not intended to specifically limit the present invention.

[0047] It should be noted that the references to "one embodiment", "an embodiment", "an exemplary embodiment", "some embodiments" and the like in the specification indicate that the embodiments described may include specific features, structures or characteristics, but not every embodiment may include the specific features, structures or characteristics. In addition, when a specific feature, structure or characteristic is described in conjunction with an embodiment, it should be within the knowledge of a person skilled in the art to implement such feature, structure or characteristic in conjunction with other embodiments (whether or not explicitly described).

[0048] In general, a term can be understood, at least in part, from its use in context. For example, depending, at least in part, on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in the singular sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense. Additionally, the term "based on" can be understood as not necessarily intended to convey an exclusive set of factors, but can instead, depending, at least in part, on the context, allow for the presence of other factors that are not necessarily explicitly described.

[0049] like Figure 1 , Figure 2 and Figure 4As shown, an embodiment of the present invention provides a decarbonization heat treatment furnace, including a heat treatment furnace body 1, a mounting guide rail 2 is arranged on the inner wall of the heat treatment furnace body 1, a mechanical arm 3 is slidably mounted on the mounting guide rail 2, a material rack 4 is arranged on one side of the mounting guide rail 2, a water storage tank 5 is arranged on the inner wall of the heat treatment furnace body 1, a water injection pump 6 is connected to one side of the water storage tank 5, a temperature sensor 10 is arranged on the top of the inner wall of the box body 1, and a heating component 7 is also included, and the heating component 7 is arranged on the inner wall of the heat treatment furnace body 1. The heating component 7 is used to heat the white hearth malleable cast iron, the decarburization component 8 is arranged on the inner wall of the heat treatment furnace body 1, and the decarburization component 8 decarburizes the heated white hearth malleable cast iron, the driving component 9 is installed on the inner wall of the heat treatment furnace body 1, and the driving component 9 is used to reciprocate and scrape the decarburization component 8 to separate the walnut sand and the carbon powder, and at the same time, stir and mix the walnut sand and the carbon powder on one side of the filling port, and the operator fills water into the water storage tank 5, starts the water injection pump 6, and makes the water Enter the heat conduction box 75, the robot arm 3 clamps the cast iron blank on the material rack 4, and the robot arm 3 places the cast iron blank on the material rack of the heating furnace 71, opens the valve of the natural gas filling tank 74, ignites the combustion nozzle 72, closes the opening and closing sealing plate of the heating furnace 71, and the temperature sensor 10 records the temperature inside the heat treatment furnace body 1. After the temperature is reached, the opening and closing sealing plate of the heating furnace 71 is opened, and the robot arm 3 clamps the heated cast iron and places it on the material rack of the decarburization furnace 81, and closes the opening and closing sealing plate of the decarburization furnace 81. The operator adds decarburizer into the decarburizer storage box 88, starts the sludge pump 1 86 and the sludge pump 2 812, and the mixture of walnut sand and decarburizer contacts and reacts with the heated cast iron. Heat treatment heating process: the cast iron in the heating furnace 71 is heated for 10 to 24 hours, and the temperature after heating is 950°C to 1100°C; insulation process: the heated temperature is maintained in the decarburizer 81 for 50 to 85 hours; cooling process: the temperature inside the decarburizer 81 is reduced to below 650°C, and the product is taken out of the furnace.

[0050] In this embodiment, an insulation board is provided on the inner wall of the heat treatment furnace body 1, the material rack 4 is divided into a blank area and a finished product area, the water storage tank 5 is installed on the side of the box door close to the heat treatment furnace body 1, the heating component 7 is installed on the left side of the mounting guide rail 2, the decarbonization component 8 is installed on the right side of the mounting guide rail 2, the driving component 9 is installed at the bottom of the decarbonization component 8, and the temperature sensor 10 is installed directly above the heating component 7.

[0051] As an implementation method in this embodiment, Figure 1 , Figure 4 and Figure 5As shown, the heating assembly 7 includes a heating furnace 71, which is installed on the bottom surface of the inner wall of the heat treatment furnace body 1. A combustion nozzle 72 is symmetrically installed on the inner side of the heating furnace 71, and the combustion nozzle 72 penetrates the heating furnace 71. The tail end of the combustion nozzle 72 is connected to a gas pipeline 73, and the tail end of the gas pipeline 73 is connected to a natural gas filling tank 74. Heat conduction boxes 75 are symmetrically installed on both sides of the heating furnace 71. The heat conduction boxes 75 are connected to the water injection pump 6 through pipelines. Steam generators 76 are connected between the heat conduction boxes 75 through pipelines. The steam generator 76 is connected to the driving assembly 9 through pipelines. The operator fills water into the water storage tank 5 and starts the water injection pump 6 to allow water to enter the heat conduction box 75. The mechanical arm 3 clamps the cast iron blank on the material rack 4, and the mechanical arm 3 casts the cast iron blank. The iron blank is placed on the material placement rack of the heating furnace 71, and the valve of the natural gas filling tank 74 is opened. The natural gas enters the combustion nozzle 72 through the gas pipeline 73. The operator ignites the natural gas from the nozzle position of the combustion nozzle 72, and closes the opening and closing sealing plate of the heating furnace 71. In the flame of the natural gas combustion of the combustion nozzles 72 on both sides, the outer flame part with the highest temperature continuously heats the cast iron blank, so that the cast iron blank can be quickly heated. At the same time, the internal temperature of the heating furnace 71 can also be quickly increased by the flame of the natural gas combustion. The heat conduction box 75 conducts heat by contacting with the heating furnace 71, so that the internal liquid water is heated and vaporized. The steam enters the steam generator 76 through the pipeline, and then enters the steam engine module 97 in the drive assembly 9 through the pipeline to drive the crank piston 96 to rotate.

[0052] In this embodiment, a material placement rack is provided on the inner side of the heating furnace 71, an opening and closing sealing plate is provided on one side of the heating furnace 71, the combustion nozzle 72 is installed at the center of the heating furnace 71, the heat conduction box 75 is made of pure copper material, and the steam generator 76 is installed below the heating furnace 71.

[0053] As an implementation method in this embodiment, Figure 1 , Figures 4 to 10 and Fig.12 As shown, the decarbonization component 8 includes a decarbonization furnace 81, which is installed on the bottom surface of the inner wall of the heat treatment furnace body 1, and a mounting frame 82 is symmetrically installed on the inner side of the decarbonization furnace 81, a turntable 83 is rotatably installed on the mounting frame 82, and injection heads 84 are installed at equal angles on the turntable 83, and the tail ends of the injection heads 84 are interconnected with the mounting frame 82 and the inner wall pipelines of the turntable 83, a connecting pipe 85 is connected to the mounting frame 82, and a sludge pump 86 is connected to the tail end of the connecting pipe 85, and the sludge pump 86 is connected to a mixing box 87 through a pipeline, and the pipeline is installed through the top surface of the mixing box 87, and the mixing box 87 is installed on the outer wall of the decarbonization furnace 81, and the top of the mixing box 87 is connected to a decarbonizer storage box 88 through a pipeline, and the decarbonizer storage box 88 is installed on the outer wall of the decarbonization furnace 81.

[0054] As an implementation method in this embodiment, Figure 1 , Figures 4 to 10 and Fig.12 As shown, a stirring rod 89 is rotatably installed at the bottom of the inner wall of the mixing box 87, and the input shaft of the stirring rod 89 is installed through the bottom of the mixing box 87, a separation box 810 is connected to the bottom of the decarbonization furnace 81, and the decarbonization furnace 81 and the separation box 810 are interconnected through the internal slot, one side of the separation box 810 is connected through a connecting pipe 2 811, the tail end of the connecting pipe 2 811 is connected to a sediment pump 2 812, the sediment pump 2 812 and the mixing box 87 are connected to each other through a connecting pipe 3 813, a mounting box 814 is connected to the bottom of the separation box 810, a carbon scraping ring 815 is nested on the inner side of the mounting box 814 near the top, a magnetic column 816 is nested on the inner side of the carbon scraping ring 815, and the magnetic column 816 is installed through the bottom surface of the separation box 810, the bottom of the magnetic column 816 is connected to the driving assembly 9, one side of the mounting box 814 is connected to a decarbonization collection box 817, and the decarbonization collection box 817 is connected to the driving assembly 9. 17 is installed on the bottom surface of the inner wall of the heat treatment furnace body 1. The operator fills water into the water tank 5 and starts the water injection pump 6 to allow water to enter the heat conduction box 75. The mechanical arm 3 clamps the cast iron blank on the material rack 4, and the mechanical arm 3 places the cast iron blank on the material placement rack of the heating furnace 71. The valve of the natural gas filling tank 74 is opened, and the natural gas enters the combustion nozzle 72 through the gas pipeline 73. The operator ignites the natural gas from the nozzle position of the combustion nozzle 72, closes the opening and closing sealing plate of the heating furnace 71, and the natural gas combustion flames of the combustion nozzles 72 on both sides, the outer flame part with the highest temperature continuously heats the cast iron blank, so that the cast iron blank can be quickly heated. At the same time, the internal temperature of the heating furnace 71 can also be quickly increased by the flame of the natural gas combustion. The heat conduction box 75 conducts heat by contacting with the heating furnace 71, so that the internal liquid water is heated and vaporized, and the steam enters the steam generator 76 through the pipeline.

[0055] Then, it enters the steam engine module 97 in the driving assembly 9 through the pipeline, drives the crank piston 96 to rotate, and the temperature sensor 10 records the temperature inside the heat treatment furnace body 1. After the temperature is reached, the opening and closing sealing plate of the heating furnace 71 is opened, the mechanical arm 3 clamps the heated cast iron and places it on the material placement rack of the decarburization furnace 81, and closes the opening and closing sealing plate of the decarburization furnace 81. The operator adds a corresponding proportion of decarburizer to the decarburizer storage box 88, and adds walnut sand to the mixing box 87 at the same time, and starts the silt pump 1 86 and the silt pump 2 812. The silt pump 1 86 draws the walnut sand and decarburizer mixture in the mixing box 87 from the inner wall pipes of the upper and lower side mounting frames 82 of the decarburization furnace 81 through the connecting pipe 1 85, and sprays it from the injection head 84 to contact the heated cast iron surface, and generates a contact force in the opposite direction on the injection head 84, so that the turntable 83 rotates, so that the walnut sand and decarburizer mixture can be evenly sprayed on the heated cast iron surface through the injection head 84.

[0056] The decarburizer contacts the heated cast iron, which can cause the cast iron to undergo a rapid decarburization reaction. Since the walnut sand has good toughness and elasticity, it can be recycled, does not contain elements contained in the cast iron, will not react with the heated cast iron and the removed carbon powder to form new compounds, and will not damage the surface of the workpiece. After the walnut sand is ejected from the injection head 84, the high-pressure fast-flow particles of the walnut sand contact the heated cast iron in the decarburization furnace 81, roll and collide, and generate impact force on the surface of the cast iron, so that the carbon powder removed by the reaction of the cast iron surface with the decarburizer is removed when the walnut sand contacts the cast iron. Under the impact force of the iron surface, it detaches from the cast iron and falls to the bottom of the decarburization furnace 81, and together with the walnut sand that falls at the bottom of the decarburization furnace 81 after impacting the cast iron surface, it falls into the separation box 810 through the slot hole at the bottom of the decarburization furnace 81. Driven by the operation of the crank piston 96, the magnetic column 816 reciprocates vertically through the slot hole at the bottom of the separation box 810, and adsorbs the carbon powder in the mixture of walnut sand and carbon powder inside the separation box 810. The carbon powder is adsorbed on the adsorption scale grooves on the surface of the magnetic column 816, reducing the probability of carbon powder scattering during the magnetic column 816 process.

[0057] When the magnetic column 816 moves downward, the surface of the magnetic column 816 contacts the carbon scraping ring 815 near the inner top position of the installation box 814, scrapes off the carbon powder adsorbed on the surface, and the carbon powder falls from the installation box 814 into the decarbonization collection box 817. The operator handles it uniformly after the heat treatment is completed, and then the decarbonization furnace 81 is sealed. The remaining walnut sand in the separation box 810 is pumped by the mud pump 812 through the connecting pipe 2 811 and returned to the mixing box 87 through the connecting pipe 3 813. Driven by the driving component 9, it is stirred and mixed with the decarburizer again, and enters the decarburization furnace 81 to contact and impact the surface of the cast iron, so as to decarburize the cast iron. The heat treatment heating process: the cast iron in the heating furnace 71 is heated for 10 to 24 hours, and the temperature after heating is 950°C to 1100°C; the insulation process: the heated temperature is maintained in the decarburization furnace 81 for 50 to 85 hours; the cooling process: the temperature inside the decarburization furnace 81 is reduced to below 650°C, and the product is taken out of the furnace.

[0058] In this embodiment, a material placement rack is provided on the inner side of the decarbonization furnace 81, an opening and closing sealing plate is provided on one side of the decarbonization furnace 81, and the connecting pipe 85 uses a one-to-two branch pipe to improve the rationality of the connecting pipe 85 in transmitting the decarbonizer and walnut sand mixture. The driving direction of the sludge pump 86 is to drive and transport from the mixing box 87 to the decarbonization furnace 81, and a rubber scraper is provided on the inner side of the carbon scraper ring 815 to improve the scraping ability of the carbon scraper ring 815 to the carbon powder adsorbed on the surface of the magnetic column 816. The driving direction of the sludge pump 812 is to drive and transport from the separation box 810 to the mixing box 87. The surface of the magnetic column 816 is provided with adsorption scales to improve the adsorption effect of the magnetic column 816 on carbon powder. The decarbonization collection box 817 uses wear-resistant material to prevent the walnut sand from being sprayed and impacting the heated cast iron, causing damage to the decarbonization collection box 817.

[0059] As an implementation method in this embodiment, Figure 1 and Figures 11 to 13 As shown, the driving assembly 9 includes a gear 91, which is mounted on the input shaft of the stirring rod 89, and the gear 91 is meshed with the gear 2 92, and the gear 2 92 is rotatably mounted on the bottom of the mixing box 87. A bevel gear set 93 is connected to the transmission shaft of the gear 2 92, and the other end of the bevel gear set 93 is meshed with the bevel gear 94, and the input end of the bevel gear 94 is connected to a crank 95, and the input end of the crank 95 is connected to a crank piston 96, and the end of the crank piston 96 is connected to a steam engine module 97, and the steam engine module 97 is interconnected with the steam generator 76 through a pipeline, and a connecting rod 98 is rotatably mounted on the end of the crank 95, and the end of the connecting rod 98 is rotatably connected to a magnetic column 816. When in use, the internal temperature of the heating furnace 71 can also be quickly increased by the flame of natural gas combustion, and the heat conduction box 75 contacts the heating furnace 71 for heat conduction, so that the internal liquid water is heated and vaporized, and the steam passes through the pipe The steam enters the steam generator 76 through the pipeline and then enters the steam engine module 97. After the steam filters the water vapor, it drives the crank piston 96 to rotate, driving the crank wheel 95 to rotate. The connecting rod 98 connected to the end of the crank wheel 95 rotates accordingly, causing the magnetic column 816 connected to the end of the connecting rod 98 to rotate, so that the magnetic column 816 is limited in the vertical direction of the carbon scraper ring 815 and the mounting box 814, and performs vertical reciprocating motion to absorb the carbon powder in the separation box 810. At the same time, the bevel gear 94 fixedly connected to the end of the crank wheel 95 meshes and rotates with the bevel gear set 93, driving the gear 2 92 connected to one side of the bevel gear set 93 through the transmission shaft to rotate, and the gear 2 92 meshes and rotates with the gear 1 91, so that the stirring rod 89 connected to the gear 1 91 rotates, and the decarbonizing agent and walnut sand in the mixing box 87 are stirred and mixed, thereby improving the decarbonization efficiency.

[0060] In this embodiment, the bevel gear set 93 uses wear-resistant materials to improve the wear resistance of the bevel gear set 93 and increase its service life. The crank piston 96 and the crank wheel 95 are coaxially installed to improve transmission stability. The steam engine module 97 is provided with a water isolation pipe to prevent water vapor from affecting the driving efficiency when the steam engine module 97 is driven.

[0061] The present application also provides a decarburization process for a decarburization heat treatment furnace, wherein the decarburization process steps are as follows:

[0062] S1, add water into the water storage tank 5, start the water injection pump 6, and the water enters the heat transfer box 75;

[0063] S2, the robot arm 3 clamps the cast iron blank on the material rack 4;

[0064] S3, the robot arm 3 places the cast iron blank on the material placement rack of the heating furnace 71, opens the valve of the natural gas filling tank 74, ignites the combustion nozzle 72, closes the opening and closing sealing plate of the heating furnace 71, and the temperature sensor 10 records the temperature;

[0065] S4, after the temperature is reached, the opening and closing sealing plate of the heating furnace 71 is opened, and the robot arm 3 clamps the heated cast iron and places it on the material placement rack of the decarburization furnace 81;

[0066] S5, closing the opening and closing sealing plate of the decarbonization furnace 81, and the operator adds decarbonization agent into the decarbonization agent storage box 88;

[0067] S6, start the sediment pump 1 86 and the sediment pump 2 812, and the walnut sand and decarburizer mixture contacts and reacts with the heated cast iron;

[0068] S7, sealing the decarburization furnace 81;

[0069] S8, heat treatment heating process: heating the cast iron in the heating furnace 71 for 10 to 24 hours, and the temperature after heating is 950°C to 1100°C; heat preservation process: maintaining the heated temperature in the decarburization furnace 81 for 50 to 85 hours; cooling process: reducing the temperature inside the decarburization furnace 81 to below 650°C;

[0070] S9, the product is released.

[0071] The working principle provided by the present invention is as follows:

[0072] When in use, the operator fills water into the water tank 5, starts the water injection pump 6, allows water to enter the heat transfer box 75, the robot arm 3 clamps the cast iron blank on the material rack 4, and the robot arm 3 places the cast iron blank on the material placement rack of the heating furnace 71, opens the valve of the natural gas filling tank 74, and the natural gas enters the combustion nozzle 72 through the gas pipeline 73. The operator ignites the natural gas from the nozzle position of the combustion nozzle 72, closes the opening and closing sealing plate of the heating furnace 71, and the natural gas burning flames of the combustion nozzles 72 on both sides, the outer flame part with the highest temperature continuously heats the cast iron blank. Heating allows the cast iron blank to heat up quickly, and at the same time, the temperature inside the heating furnace 71 can also be quickly increased through the flame of natural gas combustion. The heat conduction box 75 conducts heat through contact with the heating furnace 71, causing the internal liquid water to heat up and vaporize. The steam enters the steam generator 76 through the pipeline. After the steam filters the water vapor, it drives the crank piston 96 to rotate. The temperature sensor 10 records the temperature inside the heat treatment furnace body 1. After the temperature is reached, the opening and closing seals of the heating furnace 71 are opened, and the robotic arm 3 clamps the heated cast iron and places it on the material placement rack of the decarburization furnace 81.

[0073] The opening and closing plates of the decarburizing furnace 81 are closed, and the operator adds a corresponding proportion of decarburizing agent into the decarburizing agent storage box 88, and adds walnut sand into the mixing box 87 at the same time, and starts the sludge pump 1 86 and the sludge pump 2 812. The sludge pump 1 86 draws the walnut sand and decarburizing agent mixture in the mixing box 87 from the inner wall pipes of the upper and lower mounting frames 82 of the decarburizing furnace 81 through the connecting pipe 1 85, and sprays it from the injection head 84 to contact the heated cast iron surface, generating a contact force in the opposite direction on the injection head 84, so that the turntable 83 rotates, so that the walnut sand and decarburizing agent mixture can be evenly sprayed on the heated cast iron surface through the injection head 84, and the decarburizing agent and the heated cast iron surface are evenly sprayed. Contact with iron can cause the cast iron to undergo a rapid decarburization reaction. Since walnut sand has good toughness and elasticity, it can be recycled and does not contain elements contained in cast iron. It will not react with the heated cast iron and the removed carbon powder to form new compounds and will not damage the surface of the workpiece. After the walnut sand is ejected from the injection head 84, the high-pressure fast-flow particles of the walnut sand contact and roll and collide with the heated cast iron in the decarburization furnace 81, generating an impact force on the surface of the cast iron, causing the carbon powder removed by the reaction of the cast iron surface with the decarburizer to separate from the cast iron under the impact of the walnut sand contacting the cast iron surface, and fall to the bottom of the decarburization furnace 81, and fall to the bottom of the decarburization furnace 81 together with the walnut sand that impacts the cast iron surface and falls to the bottom of the decarburization furnace 81.

[0074] It falls into the separation box 810 through the bottom slot of the decarbonization furnace 81, and the crank piston 96 rotates to drive the crank wheel 95 to rotate. The connecting rod 98 connected to the end of the crank wheel 95 rotates accordingly, causing the magnetic column 816 connected to the end of the connecting rod 98 to rotate, so that the magnetic column 816 is limited in the vertical direction of the carbon scraper ring 815 and the installation box 814, and the magnetic column 816 reciprocates vertically through the bottom slot of the separation box 810 to adsorb the carbon powder in the mixture of walnut sand and carbon powder inside the separation box 810. The carbon powder is adsorbed on the adsorption scale grooves on the surface of the magnetic column 816, reducing the probability of carbon powder scattering during the process of the magnetic column 816. When the magnetic column 816 moves downward, the surface of the magnetic column 816 contacts the carbon scraper ring 815 near the inner top position of the installation box 814, and the carbon powder adsorbed on the surface is scraped off.

[0075] Carbon powder falls from the installation box 814 into the decarbonization collection box 817. The operator handles it uniformly after the heat treatment is completed, and then the decarbonization furnace 81 is sealed. The remaining walnut sand in the separation box 810 is pumped by the mud pump 2 812 through the connecting pipe 2 811 and returned to the mixing box 87 through the connecting pipe 3 813. The bevel gear 94 connected to the end is driven by the crankshaft 95 to mesh and rotate with the bevel gear set 93, so that the gear 2 92 connected to one side of the bevel gear set 93 through the transmission shaft rotates, and the gear 2 92 and the gear 1 91 mesh and rotate with each other, so that the gear 1 91 and the gear 1 91 are mutually connected. The stirring rod 89 is connected to rotate to stir and mix the decarburizer and walnut sand in the mixing box 87 to improve the decarburization efficiency, and then stir and mix with the decarburizer again, and enter the decarburization furnace 81 to contact and impact the surface of the cast iron to decarburize the cast iron. The heat treatment heating process: the cast iron in the heating furnace 71 is heated for 10 to 24 hours, and the temperature after heating is 950°C to 1100°C; the insulation process: the heated temperature is maintained in the decarburization furnace 81 for 50 to 85 hours; the cooling process: the temperature inside the decarburization furnace 81 is reduced to below 650°C, and the product is taken out of the furnace.

[0076] The present invention covers any substitution, modification, equivalent method and scheme made on the essence and scope of the present invention. In order to make the public have a thorough understanding of the present invention, specific details are described in detail in the following preferred embodiments of the present invention, but those skilled in the art can fully understand the present invention without the description of these details. In addition, in order to avoid unnecessary confusion about the essence of the present invention, well-known methods, processes, procedures, components and circuits are not described in detail.

[0077] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A decarburization heat treatment furnace, characterized in that: It comprises a heat treatment furnace body, the inner wall of which is provided with a mounting rail, a mechanical arm is slidably mounted on the mounting rail, a material rack is arranged on one side of the mounting rail, a water storage tank is arranged on the inner wall of the heat treatment furnace body, a water injection pump is connected to one side of the water storage tank, and a temperature sensor is arranged on the top of the inner wall of the box body; It also includes a heating component, which is arranged on the inner wall of the heat treatment furnace body and is used to heat the white heart malleable cast iron; A decarburization component, which is arranged on the inner wall of the heat treatment furnace body and performs decarburization treatment on the heated whiteheart malleable cast iron; A driving assembly is installed on the inner wall of the heat treatment furnace body, and is used to scrape the decarburization assembly back and forth to separate the walnut sand and the carbon powder, and at the same time stir and mix the walnut sand and the carbon powder on one side of the filling port.

2. The decarburization heat treatment furnace according to claim 1, characterized in that: An insulation board is arranged on the inner wall of the heat treatment furnace body, the material rack is divided into a blank area and a finished product area, the water storage tank is installed on the side of the box door close to the heat treatment furnace body, the heating component is installed on the left side of the mounting guide rail, the decarbonization component is installed on the right side of the mounting guide rail, the driving component is installed at the bottom of the decarbonization component, and the temperature sensor is installed directly above the heating component.

3. The decarburization heat treatment furnace according to claim 2, characterized in that: The heating assembly includes a heating furnace, which is installed on the bottom surface of the inner wall of the heat treatment furnace body. Combustion nozzles are symmetrically installed on the inner side of the heating furnace, and the combustion nozzles penetrate the heating furnace. The tail end of the combustion nozzle is connected to a gas pipeline, and the tail end of the gas pipeline is connected to a natural gas filling tank. Heat conduction boxes are symmetrically installed on both sides of the heating furnace, and the heat conduction boxes are interconnected with water injection pumps through pipelines. Steam generators are connected between the heat conduction boxes through pipelines, and the steam generators are interconnected with the driving assembly through pipelines.

4. The decarburization heat treatment furnace according to claim 3, characterized in that: A material placement rack is provided on the inner side of the heating furnace, an opening and closing sealing plate is provided on one side of the heating furnace, the combustion nozzle is installed at the center of the heating furnace, the heat conduction box is made of pure copper material, and the steam generator is installed below the heating furnace.

5. The decarburization heat treatment furnace according to claim 4, characterized in that: The decarburization component includes a decarburization furnace, which is installed on the bottom surface of the inner wall of the heat treatment furnace body, and a mounting frame is symmetrically installed on the inner side of the decarburization furnace. A turntable is rotatably installed on the mounting frame, and injection heads are installed on the turntable at equal angles. The tail ends of the injection heads are connected to the mounting frame and the inner wall pipeline of the turntable, and a connecting pipe 1 is connected to the mounting frame, and a sludge pump 1 is connected to the tail end of the connecting pipe. The sludge pump 1 is connected to a mixing box through a pipeline, and the pipeline is installed through the top surface of the mixing box, and the mixing box is installed on the outer wall of the decarburization furnace, and the top of the mixing box is connected to a decarburizer storage box through a pipeline, and the decarburizer storage box is installed on the outer wall of the decarburization furnace.

6. The decarburization heat treatment furnace according to claim 5, characterized in that: A stirring rod is rotatably installed at the bottom of the inner wall of the mixing box, and the input shaft of the stirring rod is installed through the bottom of the mixing box; a separation box is connected to the bottom of the decarburization furnace, and the decarburization furnace and the separation box are interconnected through internal slots; one side of the separation box is connected through connecting pipe 2, and the tail end of the connecting pipe 2 is connected to sediment pump 2, and the sediment pump 2 and the mixing box are interconnected through connecting pipe 3; a mounting box is connected to the bottom of the separation box, and a carbon scraping ring is nested on the inner side of the mounting box near the top, and a magnetic column is nested on the inner side of the carbon scraping ring, and the magnetic column is installed through the bottom surface of the separation box, and the bottom of the magnetic column is connected to the driving assembly; one side of the mounting box is connected to a decarburization collection box, and the decarburization collection box is installed on the bottom surface of the inner wall of the heat treatment furnace body.

7. The decarburization heat treatment furnace according to claim 6, characterized in that: A material placement rack is provided on the inner side of the decarbonization furnace, an opening and closing sealing plate is provided on one side of the decarbonization furnace, the connecting pipe one uses a one-to-two branch pipe, the driving direction of the sludge pump one is to drive and transport from the mixing box to the decarbonization furnace, a rubber scraper is provided on the inner side of the carbon scraper ring, the driving direction of the sludge pump two is to drive and transport from the separation box to the mixing box, the surface of the magnetic suction column is provided with adsorption scales, and the decarbonization collection box uses wear-resistant materials.

8. The decarburization heat treatment furnace according to claim 7, characterized in that: The driving assembly includes gear 1, which is installed on the input shaft of the stirring rod. Gear 1 is meshed with gear 2, and gear 2 is rotatably installed at the bottom of the mixing box. A helical gear set is connected to the transmission shaft of gear 2, and the other end of the helical gear set is meshed with the helical gear. The input end of the helical gear is connected to a crankshaft, and the input end of the crankshaft is connected to a crank piston. The end of the crank piston is connected to a steam engine module, and the steam engine module is interconnected with a steam generator through a pipeline. A connecting rod is rotatably installed on the end of the crankshaft, and the end of the connecting rod is rotatably connected to a magnetic column.

9. The decarburization heat treatment furnace according to claim 8, characterized in that: The helical gear set is made of wear-resistant material, the crank piston and the crank wheel are coaxially installed, and the steam engine module is provided with a water separator.

10. The decarburization process of the decarburization heat treatment furnace according to claim 9, characterized in that: The decarburization process steps are as follows: S1, add water into the water tank, start the water injection pump, and the water enters the heat transfer box; S2, the robotic arm grabs the cast iron blank on the material rack; S3, the robot arm places the cast iron blank on the material placement rack of the heating furnace, opens the valve of the natural gas filling tank, ignites the combustion nozzle, closes the opening and closing sealing plate of the heating furnace, and the temperature sensor records the temperature; S4. After the temperature is reached, the opening and closing sealing plate of the heating furnace is opened, and the mechanical arm clamps the heated cast iron out and places it on the material placement rack of the decarburization furnace; S5. Close the opening and closing sealing plate of the decarburization furnace, and the operator adds decarburization agent into the decarburization agent storage box; S6, starting the sludge pump 1 and the sludge pump 2, so that the mixture of walnut sand and decarburizer contacts and reacts with the heated cast iron; S7, sealing the decarburization furnace; S8, heat treatment heating process: heating the cast iron in the heating furnace for 10 to 24 hours, and the temperature after heating is 950°C to 1100°C; insulation process: maintaining the heated temperature inside the decarburization furnace for 50 to 85 hours; cooling process: reducing the temperature inside the decarburization furnace to below 650°C; S9, the product is released.

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