Nickel-chromium-iron alloy material and preparation process thereof

Abstract

The invention provides a nickel-chromium-iron alloy material and a preparation process thereof, and relates to the technical field of preparation devices.The nickel-chromium-iron alloy material is characterized in that a smelting assembly is located above a tank body and used for smelting alloy raw materials, and a preheating assembly is installed on a water tank and used for conducting heat in tail gas generated by the smelting assembly into a conveying assembly; and the preheating assembly is arranged in the tank body and used for preheating the alloy raw materials in the conveying assembly, the conveying assembly conveys the alloy raw materials into the smelting assembly to be smelted, and a stirring assembly is arranged in the tank body and used for stirring the smelted alloy raw materials. The preheating assembly is arranged, heat carried by tail gas in the smelting process is used for heating circulating water, then the heat is transferred to raw materials in the conveying pipeline through the preheating pipe, recycling of waste heat of the tail gas is achieved, energy consumption is effectively reduced, after the preheated raw materials enter the smelting assembly, the smelting time can be shortened, and the smelting efficiency is improved. And the smelting efficiency is improved, so that the overall production energy consumption and cost are reduced.

Description

Technical Field

[0001] This invention relates to the field of preparation equipment technology, and in particular to nickel-chromium-iron alloy materials and their preparation process. Background Technology

[0002] Nickel-chromium-iron alloys are widely used in aerospace, machinery manufacturing, chemical equipment, electronic components, and many other fields due to their excellent high-temperature resistance, corrosion resistance, and good mechanical strength. With the continuous development of industrial technology, the market is placing higher demands on the purity, compositional uniformity, and production efficiency of nickel-chromium-iron alloy materials.

[0003] However, existing nickel-chromium-iron alloy material preparation equipment still has shortcomings in practical applications: a large amount of high-temperature exhaust gas is generated during the smelting process, and existing equipment mostly directly discharges the exhaust gas into the environment. The large amount of heat carried by the exhaust gas is not effectively recovered, resulting in serious energy waste and increasing production energy consumption and costs.

[0004] In view of the shortcomings of the existing technology, there is an urgent need for a nickel-chromium-iron alloy material preparation device with energy recovery and utilization capabilities to meet the actual needs of industrial production. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing nickel-chromium-iron alloy materials and their preparation process.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a nickel-chromium-iron alloy material and its preparation process, comprising a tank body, the outer surface of which is provided with support legs, a support frame installed on the tank body, a ladder installed on the support frame, a support frame for assembling a smelting assembly and a water tank installed on the ladder, the smelting assembly located above the tank body for smelting alloy raw materials, a preheating assembly installed on the water tank for transferring heat from the exhaust gas generated by the smelting assembly to the conveying assembly for preheating the alloy raw materials in the conveying assembly, the conveying assembly conveying the alloy raw materials to the smelting assembly for smelting, a stirring assembly installed inside the tank body for stirring the smelted alloy raw materials, and a control panel installed on the outer surface of the tank body for controlling the electronic components of the entire device.

[0007] Preferably, the stirring assembly includes a motor, the motor is mounted on the lid of the tank, the output shaft of the motor is fixedly connected to a rotating rod via a coupling, the interior of the tank is connected to a mounting frame via a connecting bracket, the mounting frame is provided with a linkage component for the motor to drive several stirring components, and the bottom of the rotating rod is provided with an adjustable angle adjustment component.

[0008] Preferably, the linkage includes a first gear fixed on the rotating rod, and several shafts rotatably pass through the inner part of the mounting frame on the outer circumference of the first gear. Each shaft is equipped with a second gear that meshes with the first gear at one end inside the mounting frame.

[0009] Preferably, the stirring component consists of several stirring blades. Each shaft has several stirring blades on its outer circumferential surface at one end outside the mounting frame. When the motor drives the rotating rod to rotate, the rotating rod drives the first gear to mesh with several second gears. The several second gears drive several shafts to rotate, so that the stirring blades on the several shafts can rotate independently, increasing the rotation range.

[0010] Preferably, the adjusting component includes a connecting plate connected to one end of a rotating rod through the mounting frame. Several rocker arms are rotatably connected to the connecting plate via the rotating rod. A stirring rod is tunably connected to one end of each rocker arm via bolts and nuts. A slip ring is slidably connected to the rotating rod. The slip ring is hinged to the other end of the rocker arm. Limiting holes are provided on both the slip ring and the rotating rod. Limiting pins for controlling the sliding position of the slip ring on the rotating rod are provided in the limiting holes.

[0011] When excessive material in the conical bottom of the tank can cause blockage, the angle of the stirring rod can be adjusted to increase the flow rate near the bottom conical bottom. Initial adjustment of the stirring rod angle is made using bolts and nuts. Simultaneously, the limit pin is removed, and a sliding ring is slid across the outer surface of the rotating rod. This causes the sliding ring to move one end of the rocker arm, which in turn rotates the other end of the rocker arm via the rotating rod, thus adjusting the stirring rod angle. Once adjustment is complete, the limit pin is reinserted into the appropriate position in the limit hole. Preferably, the stirring rod is also provided with a buckle for engaging the scraper. When the stirring rod is adjusted to the inner wall of the tank, the scraper will be engaged with the inner wall of the tank by means of the buckle to scrape off the residue on the inner wall of the tank.

[0012] Preferably, the smelting assembly includes a heating frame on the mounting frame, an anti-clogging component on the top of the heating frame, two sets of high-frequency heaters on both the top and bottom of the heating frame for heating the alloy material, a tail gas discharge pipe on one side of the heating frame for discharging the tail gas of the smelting alloy material, and a feeding pipe at the bottom of the heating frame connected to the feed port on the tank cover for introducing the smelted alloy material into the tank for stirring.

[0013] Preferably, the anti-clogging component includes a hopper. The top of the heating frame is fitted with the hopper, and symmetrical grooves are provided on both sides of the bottom of the hopper. A sliding plate is slidably connected to the inner wall of the groove, and a reserved hole is provided on the sliding plate. A mounting plate is connected to the bottom of the sliding plate by a spring. A push rod is mounted on the mounting plate below the reserved hole. A push rod is rotatably mounted on the mounting plate, and a protrusion is fixedly connected to the push rod. When the alloy raw material clogs the filter screen at the bottom of the hopper, the push rod is pushed, causing the push rod to move the sliding plate and the push rod to below the filter screen. Then, the push rod is rotated, causing the push rod to drive the protrusion to squeeze the sliding plate, separating the sliding plate and the mounting plate. At this time, the spring is stretched. Then, the push rod drives the protrusion to stop squeezing the sliding plate. The spring's rebound force causes the mounting plate to drive the push rod to extend out of the reserved hole and insert into the filter screen to clear the material. This operation is repeated, rotating the push rod to repeatedly insert the push rod into the filter screen to clear the material and prevent the hopper from becoming clogged.

[0014] Preferably, the conveying assembly includes a conveying channel and a conveying auger, a conveying pipe is installed above the hopper, a conveying auger is installed inside the conveying pipe, and a feed funnel is connected to the outer surface of the conveying pipe for feeding alloy materials.

[0015] Preferably, the preheating assembly includes a first pipe and a second pipe. The first pipe and the second pipe are respectively installed on both sides of the exhaust pipe. A water pump is installed on the first pipe. The water pump draws water from the water tank into the first pipe through the water inlet pipe. Several heat exchange components are inserted inside the exhaust pipe. The heat exchange components include an inner pipe, an outer pipe, and a branch pipe. The branch pipe is connected to the first pipe to introduce water into the inner pipe. The inner pipe is placed inside the outer pipe and is open from top to bottom. The outer pipe is inserted into the exhaust pipe. A transfer pool is provided on the exhaust pipe. The opening of the outer pipe is located in the transfer pool. Several conduits are provided on the transfer pool to guide water into the second pipe. One end of the second pipe is connected to a preheating pipe. The end of the preheating pipe away from the second pipe is spirally wound around the outer surface of the conveying pipe and then connected to the water tank. When it is necessary to preheat the alloy material in the conveying pipeline, the water pump is started. The water pump introduces water from the water tank into Pipe No. 1 through the inlet pipe. Pipe No. 1 introduces water into several branch pipes. The water in the branch pipes is introduced into the inner pipe and then flows into the outer pipe. As the water passes through the outer pipe, it carries away the heat transferred to the outer pipe by the exhaust gas. The heated water flows from the outer pipe into the transfer pool, and then from the transfer pool into Pipe No. 2 through the conduit. Finally, it flows from Pipe No. 2 into the preheating pipe. The preheating pipe heats the conveying pipeline with the heated water and preheats the alloy material.

[0016] Preferably, the nickel-chromium-iron alloy material is prepared using any one of the nickel-chromium-iron alloy material preparation processes described above, including Ni 72%, Cr 14-17%, Fe 6-10%, C≤0.15%, Mn≤1.0%, Si≤0.5%, and S≤0.015%.

[0017] Compared with the prior art, the advantages and positive effects of the present invention are as follows: 1. In this invention, by setting up a preheating component, the heat carried by the exhaust gas during the smelting process is used to heat the circulating water, and then the heat is transferred to the raw materials in the conveying pipeline through the preheating pipe, thereby realizing the recovery and reuse of the exhaust gas waste heat, effectively reducing energy consumption. After the preheated raw materials enter the smelting component, the smelting time can be shortened, the smelting efficiency can be improved, and the overall production energy consumption and cost can be reduced.

[0018] 2. In this invention, the stirring assembly adopts a linkage structure of a first gear plus multiple sets of second gears. When the motor drives the rotating rod to rotate, it can drive multiple shafts and stirring blades to rotate synchronously and independently, which greatly expands the stirring range, ensures that the alloy melt in the tank is fully mixed, and improves the uniformity of composition. At the same time, an adjustable stirring rod is set. Through the sliding ring and adjusting bolt and nut, the tilt angle of the stirring rod can be flexibly adjusted. This not only effectively solves the problem of accumulation and blockage in the conical area at the bottom of the tank, but also removes the residue on the inner wall of the tank by installing a scraper, avoiding the residual material from affecting the quality of subsequent products, and further ensuring the purity and performance of the alloy material.

[0019] 3. In this invention, the anti-clogging component at the bottom of the hopper works in conjunction with the push rod, protrusion, spring and top rod. When the filter screen becomes clogged, the push rod can be rotated repeatedly to drive the top rod to move up and down, thus automatically clearing the filter screen. This eliminates the need for frequent manual cleaning, reduces downtime, and significantly improves the continuity and stability of production. At the same time, the filter screen can filter impurities and large clumps in the raw materials, ensuring the smooth progress of the smelting process. Attached Figure Description

[0020] Figure 1 A three-dimensional structural schematic diagram of the nickel-chromium-iron alloy material and its preparation process proposed in this invention; Figure 2 This is a three-dimensional structural schematic diagram of the nickel-chromium-iron alloy material and its preparation process proposed in this invention from another perspective. Figure 3 This is a schematic diagram of the stirring assembly for the nickel-chromium-iron alloy material and its preparation process proposed in this invention. Figure 4 This invention proposes nickel-chromium-iron alloy materials and their preparation process. Figure 3 Enlarged view of point A in the middle; Figure 5 A schematic diagram of the preheating component for the nickel-chromium-iron alloy material and its preparation process proposed in this invention; Figure 6 A schematic diagram of the structure of the conveying assembly for the nickel-chromium-iron alloy material and its preparation process proposed in this invention; Figure 7A schematic diagram of the heat exchanger structure of the nickel-chromium-iron alloy material and its preparation process proposed in this invention; Figure 8 This is a schematic diagram of the anti-clogging component based on the nickel-chromium-iron alloy material and its preparation process proposed in this invention.

[0021] Legend: 1. Tank body; 11. Tank lid; 12. Feed inlet; 2. Support frame; 21. Ladder; 22. Support frame; 3. Support leg; 4. Mixing assembly; 41. Motor; 42. Mounting frame; 43. Rotating rod; 44. Gear No. 1; 45. Gear No. 2; 46. Shaft; 47. Mixing blade; 48. Connecting plate; 49. Rocker arm; 410. Mixing rod; 411. Slip ring; 412. Limiting hole; 413. Limiting pin; 5. Melting assembly; 51. Anti-clogging component; 511. Hopper; 512. Slide groove; 513. Slide plate; 51 4. Spring; 515. Top rod; 516. Push rod; 517. Protrusion; 52. High-frequency heater; 53. Heating frame; 54. Exhaust pipe; 55. Feed pipe; 6. Conveying assembly; 61. Conveying pipeline; 62. Conveying auger; 63. Feed hopper; 7. Preheating assembly; 71. Pipe No. 1; 72. Water pump; 73. Water inlet pipe; 74. Heat exchanger; 741. Outer pipe; 742. Inner pipe; 743. Branch pipe; 75. Transfer tank; 76. Guide pipe; 77. Pipe No. 2; 78. Preheating pipe; 8. Water tank; 9. Control panel. Detailed Implementation

[0022] like Figure 1-8 As shown, this invention provides a nickel-chromium-iron alloy material and its preparation process, including a tank body 1. Support legs 3 are evenly distributed at the four corners of the bottom of the tank body 1 to provide stable support for the entire device. A support frame 2 is welded and fixed to the outside of the tank body 1. A ladder 21 is fixedly installed along the vertical frame of the support frame 2, facilitating workers to climb to higher positions for equipment maintenance or operation. A support frame 22 is horizontally welded to the top of the ladder 21. The support frame 22 is a rectangular frame structure, on which a smelting assembly 5 and a water tank 8 are fixedly mounted. The smelting assembly 5 is located directly above the tank body 1 and is specifically used for high-temperature smelting of the alloy raw materials. A preheating assembly 7 is installed on the water tank 8. The core function of the preheating assembly 7 is to recover the residual heat from the exhaust gas generated by the smelting assembly 5 and transfer this heat to the conveying assembly 6, achieving preheating of the alloy raw materials during the conveying process and improving subsequent smelting efficiency. The conveying assembly 6 is erected above the smelting assembly 5 and is responsible for accurately conveying the alloy raw materials to be smelted into the interior of the smelting assembly 5. The tank 1 is equipped with a stirring assembly 4, which is used to thoroughly stir the alloy material after melting to ensure that the alloy components are mixed evenly. A control panel 9 is fixedly installed on one side of the outer surface of the tank 1 by bolts. The control panel 9 integrates a main control chip and circuit module, and is electrically connected to all electronic components of the device, which can realize centralized control and parameter adjustment of the operating status of each component.

[0023] The stirring assembly 4 includes a motor 41, which is vertically fixed to the center of the top of the tank cover 11 of the tank body 1 by bolts. The output shaft of the motor 41 passes through a reserved mounting hole on the tank cover 11, and the lower end of the output shaft is fixedly connected to the upper end of the rotating rod 43 by a coupling, ensuring that the motor 41 can drive the rotating rod 43 to rotate synchronously after starting. In the upper middle part of the tank body 1, a ring-shaped connecting frame is fixedly connected to the mounting frame 42. The mounting frame 42 is a hollow circular frame structure, and a linkage component is set inside to transmit the driving force of the motor 41 to several stirring components. The linkage includes a first gear 44, which is fixedly mounted on the middle of the rotating rod 43 via a flat key. Several shafts 46 are evenly distributed inside the mounting frame 42, located on the outer circumference of the first gear 44. Both ends of the shafts 46 are rotatably connected to the frame wall of the mounting frame 42 via rolling bearings. A second gear 45 is fixedly mounted on one end of each shaft 46 inside the mounting frame 42 via a flat key. The second gear 45 meshes with the first gear 44, and the meshing surfaces are precision-polished to ensure smooth and uninterrupted transmission. The stirring component consists of several stirring blades 47. Several stirring blades 47 are evenly fixed to the outer circumference of one end of each shaft 46 outside the mounting frame 42 via welding. The stirring blades 47 are made of high-temperature and corrosion-resistant nickel-chromium alloy, and their surfaces are treated with anti-oxidation to extend their service life. The bottom of the rotating rod 43 is equipped with an adjustable adjustment component, which includes a connecting plate 48. The connecting plate 48 is fixed to the lower end of the rotating rod 43 through the mounting frame 42 by bolts. Several rocker arms 49 are hinged to the edge of the connecting plate 48 via a rotating rod. The rocker arms 49 can rotate freely around the rotating rod. One end of the rocker arm 49 is adjustablely connected to the stirring rod 410 by bolts and nuts. The tilt angle of the stirring rod 410 can be initially adjusted by tightening or loosening the bolts and nuts. A slip ring 411 is fitted on the rotating rod 43. The inner hole of the slip ring 411 is adapted to the outer circumferential surface of the rotating rod 43 and can slide freely along the axial direction of the rotating rod 43. The outer circumferential surface of the slip ring 411 is hinged to the other end of each rocker arm 49 via a hinge. Several limiting holes 412 are correspondingly provided on the slip ring 411 and the rotating rod 43. The limiting holes 412 are evenly distributed along the axial direction of the rotating rod 43. A limiting pin 413 is inserted into the limiting hole 412. The limiting pin 413 is made of high-strength steel and is used to fix the position of the slip ring 411 on the rotating rod 43, thereby locking the adjustment angle of the stirring rod 410. The stirring rod 410 is also provided with an elastic buckle. The scraper is detachably snapped onto the stirring rod 410 through the buckle. When the stirring rod 410 is adjusted to fit against the inner wall of the tank 1, the scraper can make close contact with the inner wall of the tank 1, which is convenient for scraping off residual alloy material.

[0024] The melting assembly 5 includes a heating frame 53, which is bolted to the support frame 22. An anti-blocking component 51 is installed on the top of the heating frame 53 to prevent blockage of the alloy raw materials during feeding. Two sets of high-frequency heaters 52 are fixedly installed on the upper and lower sides of the heating frame 53 via brackets. The two sets of high-frequency heaters 52 are symmetrically distributed, and their heating area can completely cover the internal space of the heating frame 53, quickly heating the alloy raw materials to a molten state. A tail gas exhaust pipe 54 is welded to the lower part of one side of the heating frame 53, connecting to the interior of the heating frame 53 to promptly discharge waste gas generated during the melting process. A feed pipe 55 is welded to the center of the bottom of the heating frame 53. The lower end of the feed pipe 55 passes through the feed inlet 12 on the tank cover 11 and extends to the upper interior of the tank body 1, ensuring that the molten alloy flows smoothly into the tank body 1. The anti-clogging component 51 includes a hopper 511, which is bolted to the top feed inlet of the heating frame 53. A filter screen is installed at the bottom of the hopper 511 to filter impurities and large clumps in the alloy raw materials. Symmetrical grooves 512 are formed on the inner walls of both sides of the bottom of the hopper 511. The grooves 512 are rectangular, and a sliding plate 513 is adapted to slide within them, allowing free movement along the length of the grooves. Several pre-drilled holes are formed on the sliding plate 513, their positions corresponding to the holes in the filter screen at the bottom of the hopper 511. The bottom of the sliding plate 513 is connected to the mounting plate via several evenly distributed springs 514. When the springs 514 are in their naturally extended state, the push rods 515 are located directly below the pre-drilled holes. Several push rods 515 are vertically welded to the mounting plate, their number and position corresponding to the pre-drilled holes. The upper end of each push rod 515 has a tapered structure for easy insertion into the mesh of the filter screen. A push rod 516 is mounted on the mounting plate via a pivot. A protrusion 517 is welded and fixed to the side of the push rod 516 near the slide plate 513. The protrusion 517 has an arc-shaped structure and can squeeze the slide plate 513 when the push rod 516 rotates.

[0025] The conveying assembly 6 includes a conveying pipe 61 and a conveying auger 62. The conveying pipe 61 is supported above the hopper 511 by several supports. The discharge end of the conveying pipe 61 is aligned with the inlet of the hopper 511 to ensure that the raw materials fall accurately into the hopper 511. The conveying auger 62 is installed inside the conveying pipe 61. Both ends of the conveying auger 62 are rotatably connected to the end plates of the conveying pipe 61 via rolling bearings. One end of the conveying auger 62 extends to the outside of the conveying pipe 61 and is connected to the output shaft of the drive motor via a coupling. After the drive motor starts, it can drive the conveying auger 62 to rotate at a uniform speed. A feed funnel 63 is welded and connected above the inlet end of the conveying pipe 61. The feed funnel 63 has a conical structure that is wider at the top and narrower at the bottom, which facilitates the addition of alloy raw materials into the device by the operator.

[0026] The preheating assembly 7 includes a first pipe 71 and a second pipe 77, which are fixedly installed on both sides of the exhaust pipe 54 using pipe clamps. A water pump 72 is fixedly mounted on the first pipe 71 via a flange. The inlet of the water pump 72 is connected to an inlet pipe 73 via a flange, and the other end of the inlet pipe 73 extends to the bottom of the water tank 8 to ensure that all water in the water tank 8 can be drawn. Several heat exchange components 74 are inserted inside the exhaust pipe 54. Each heat exchange component 74 includes an inner pipe 742, an outer pipe 741, and a branch pipe 743. The outer pipe 741 is vertically inserted into the exhaust pipe 54, with its upper end closed and its lower end open. The inner pipe 742 is coaxially sleeved inside the outer pipe 741, and both ends of the inner pipe 742 are open structures. The length of the inner pipe 742 is the same as the length of the outer pipe 741. One end of branch pipe 743 is connected to pipe 71 (number 1) via a tee connector, and the other end passes through the wall of exhaust pipe 54 and connects to the upper end of inner pipe 742, ensuring that water can smoothly enter inner pipe 742. A transfer tank 75 is welded and fixed to the outer bottom of exhaust pipe 54. The transfer tank 75 is a rectangular trough with an open top. The open end of outer pipe 741 extends into the interior of transfer tank 75, ensuring that all the water after heat exchange flows into transfer tank 75. Several conduits 76 are welded and connected to one side of transfer tank 75. The other end of conduits 76 is connected to pipe 77 (number 2) via a flange. One end of pipe 77 is connected to a preheating pipe 78 via a tee connector. The preheating pipe 78 is made of high-temperature resistant, highly thermally conductive copper. The end of preheating pipe 78 away from pipe 77 is tightly spirally wound around the outer surface of conveying pipe 61, and finally connected to water tank 8 via a pipe, forming a complete water circulation loop.

[0027] Working Principle: When using this nickel-chromium-iron alloy material preparation device, the operator first turns on the power of the entire device through the control panel 9. Then, the operator sets parameters such as the speed of motor 41, the heating power of high-frequency heater 52, the operating power of water pump 72, and the rotation speed of conveying auger 62 through the control panel 9. After the drive motor corresponding to conveying auger 62 starts, it drives the conveying auger 62 to rotate at a constant speed in the conveying pipe 61. The operator pours the mixed raw materials of nickel-chromium-iron alloy into the feed funnel 63. The raw materials slide down the inner wall of the feed funnel 63 into the conveying pipe 61, and are smoothly conveyed towards the hopper 511 under the spiral pushing action of the conveying auger 62. At the same time, the control panel 9 controls the water pump 72 to start. The water pump 72 draws cold water from the water tank 8 through the water inlet pipe 73, pressurizes the cold water, and introduces it into pipe 71. The cold water in pipe 71 flows into the corresponding inner pipe 742 through several branch pipes 743, and then flows into the interior of the outer pipe 741 from the lower end of the inner pipe 742.

[0028] During the raw material conveying process, the high-frequency heater 52 of the melting assembly 5 is preheated in advance. When the raw material is conveyed to the hopper 511, the filter screen at the bottom of the hopper 511 will screen the raw material, intercepting impurities and large clumps. Raw materials that meet the particle size requirements will smoothly enter the heating frame 53. At this time, the high-frequency heater 52 releases a high-frequency electromagnetic field, causing an eddy current effect inside the raw material, which will then rapidly heat up to the molten state, completing the melting process. The high-temperature exhaust gas generated during the melting process is discharged to the outside through the exhaust gas discharge pipe 54. When the exhaust gas flows in the exhaust gas discharge pipe 54, it will come into full contact with the outer wall of the inserted outer pipe 741, transferring heat to the outer pipe 741. The cold water in the outer pipe 741 absorbs the heat and its temperature rises, turning into hot water.

[0029] The heated hot water flows out from the lower opening of the outer pipe 741 and falls into the transfer pool 75. The transfer pool 75 collects and buffers the hot water. The hot water then flows through several conduits 76 into the second pipe 77, and from the second pipe 77 into the preheating pipe 78. Because the preheating pipe 78 is tightly spirally wound around the outer surface of the conveying pipe 61, the hot water flowing inside the preheating pipe 78 transfers heat to the conveying pipe 61 through the pipe wall, thus preheating the raw materials being conveyed in the pipe. This ensures that the raw materials have a certain temperature before entering the heating frame 53, effectively shortening the subsequent melting time and reducing energy consumption. After heat exchange, the temperature of the hot water decreases, and it eventually flows back to the water tank 8 through the pipe, achieving water resource recycling.

[0030] If the filter screen at the bottom of hopper 511 becomes clogged due to raw material accumulation, the operator can manually push the push rod 516. The push rod 516 drives the sliding plate 513 to slide along the groove 512, causing the top rod 515 to move to the corresponding clogged position below the filter screen. Then, rotating the push rod 516 causes the protrusion 517 on the push rod 516 to press against the sliding plate 513, creating relative displacement between the sliding plate 513 and the mounting plate. At this time, the spring 514 is stretched and stores elastic potential energy. Next, rotating the push rod 516 in the opposite direction causes the protrusion 517 to release its pressure on the sliding plate 513. The spring 514, under the action of elastic rebound force, quickly contracts, causing the mounting plate to move upward. The top rod 515 then passes through the pre-drilled hole on the sliding plate 513 and inserts into the mesh of the filter screen, pushing away the clogged raw material. Repeating this operation of the push rod 516 and the top rod 515 repeatedly inserting and retracting from the filter screen achieves efficient unblocking of the clogged position, ensuring a continuous and stable flow of raw material into the heating frame 53.

[0031] The molten alloy slowly falls into the tank 1 through the feed pipe 55. At this time, the control panel 9 starts the motor 41 of the stirring assembly 4. The motor 41 drives the rotating rod 43 to rotate at a constant speed. The first gear 44 on the rotating rod 43 rotates synchronously and drives several second gears 45 meshing with it to rotate. The second gears 45 drive the corresponding shaft 46 to rotate, and the stirring blades 47 on the shaft 46 rotate at high speed to fully stir the molten alloy in the tank 1, so that the components such as nickel, chromium, and iron are mixed evenly, ensuring the stability of the alloy material's performance.

[0032] When there is a risk of blockage at the conical bottom of tank 1 due to excessively rapid cooling of the molten alloy or material accumulation, workers can first adjust the angle of the stirring rod 410 by loosening or tightening bolts and nuts. Then, the limiting pin 413 is pulled out, and the slip ring 411 slides along the axial direction of the rotating rod 43. The slip ring 411 drives one end of the rocker arm 49 to move synchronously, while the other end of the rocker arm 49 rotates around the rotating rod, further fine-tuning the angle of the stirring rod 410. When the angle of the stirring rod 410 is adjusted to effectively promote the flow of material at the bottom, the limiting pin 413 is reinserted into the corresponding limiting hole 412 to fix the position of the slip ring 411, thereby locking the angle of the stirring rod 410, increasing the flow rate of the molten alloy near the conical bottom of tank 1, and preventing blockage.

[0033] If it is necessary to scrape off residual alloy material from the inner wall of tank 1, the operator can fix the scraper onto the stirring rod 410 using the elastic clips on the stirring rod 410, and then adjust the angle of the stirring rod 410 according to the above adjustment method to ensure that the scraper is in close contact with the inner wall of tank 1. During the rotation of the stirring blade 47 and the stirring rod 410, the scraper will slide synchronously along the inner wall of tank 1, scraping off the residual material adhering to the wall surface, ensuring full utilization of the material, and also preventing residual material from affecting the quality of subsequent batches of products.

[0034] Throughout the preparation process, staff can monitor the operating status of each component in real time through the control panel 9, and flexibly adjust relevant parameters according to the actual situation to ensure that the device is always in a stable and efficient operating state, and finally complete the continuous preparation of nickel-chromium-iron alloy materials.

Claims

1. A process for preparing nickel-chromium-iron alloy materials, characterized in that: The device includes a tank (1), with legs (3) on the outer surface of the tank (1), a support frame (2) installed on the tank body of the tank (1), a ladder (21) installed on the support frame (2), a support frame (22) for assembling a smelting assembly (5) and a water tank (8) installed on the ladder (21), the smelting assembly (5) located above the tank (1) for smelting alloy raw materials, a preheating assembly (7) installed on the water tank (8) for transferring the heat from the exhaust gas generated by the smelting assembly (5) to the conveying assembly (6) for preheating the alloy raw materials in the conveying assembly (6), the conveying assembly (6) for conveying the alloy raw materials to the smelting assembly (5) for smelting, a stirring assembly (4) installed inside the tank (1) for stirring the smelted alloy raw materials, and a control panel (9) installed on the outer surface of the tank (1) for controlling the electronic components of the entire device.

2. The preparation process of nickel-chromium-iron alloy material according to claim 1, characterized in that: The stirring assembly (4) includes a motor (41). The motor (41) is mounted on the lid (11) of the tank body (1). The output shaft of the motor (41) is fixedly connected to a rotating rod (43) via a coupling. The interior of the tank body (1) is connected to a mounting frame (42) via a connecting bracket. The interior of the mounting frame (42) is provided with a linkage component for the motor (41) to drive several stirring components. The bottom of the rotating rod (43) is provided with an adjustable angle adjustment component.

3. The preparation process of nickel-chromium-iron alloy material according to claim 2, characterized in that: The linkage includes a first gear (44) fixed on a rotating rod (43), and several shafts (46) rotatably pass through the inner part of the mounting frame (42) on the outer circumference of the first gear (44). Each shaft (46) is equipped with a second gear (45) at one end inside the mounting frame (42), which meshes with the first gear (44).

4. The preparation process of nickel-chromium-iron alloy material according to claim 3, characterized in that: The stirring component consists of several stirring blades (47), and each shaft (46) has several stirring blades (47) on its outer circumferential surface at one end outside the mounting frame (42).

5. The preparation process of nickel-chromium-iron alloy material according to claim 4, characterized in that: The adjusting component includes a rotating rod (43) that passes through a connecting plate (48) connected to one end of a mounting frame (42). Several rocker arms (49) are rotatably connected to the connecting plate (48) by means of the rotating rod. One end of each rocker arm (49) is adjustablely connected to a stirring rod (410) by means of bolts and nuts. A slip ring (411) is slidably connected to the rotating rod (43). The slip ring (411) is hinged to the other end of the rocker arm (49). Limiting holes (412) are provided on both the slip ring (411) and the rotating rod (43). A limiting pin (413) is provided in the limiting hole (412) to control the sliding position of the slip ring (411) on the rotating rod (43).

6. The preparation process of nickel-chromium-iron alloy material according to claim 5, characterized in that: The stirring rod (410) is also provided with a buckle for engaging the scraper. When the stirring rod (410) is adjusted to fit against the inner wall of the tank (1), the scraper will be installed with the buckle to contact the inner wall of the tank (1) to scrape off the residue on the inner wall of the tank (1).

7. The preparation process of nickel-chromium-iron alloy material according to claim 6, characterized in that: The smelting assembly (5) includes a heating frame (53), the top of which is provided with an anti-blocking component (51). The heating frame (53) is provided with two sets of high-frequency heaters (52) at the top and bottom for heating the alloy material. The heating frame (53) is provided with a tail gas discharge pipe (54) on one side for discharging the tail gas of the smelting alloy material. The bottom of the heating frame (53) is connected to a feeding pipe (55), which is connected to the feed inlet (12) on the tank cover (11) for introducing the smelted alloy material into the tank (1) for stirring.

8. The preparation process of nickel-chromium-iron alloy material according to claim 7, characterized in that: The anti-clogging component (51) includes a hopper (511). The top of the heating frame (53) is fitted with the hopper (511). The bottom sides of the hopper (511) are symmetrically provided with grooves (512). The inner wall of the grooves (512) is slidably connected with a sliding plate (513). The sliding plate (513) is provided with a reserved hole. The bottom of the sliding plate (513) is connected to a mounting plate by a spring (514). A top rod (515) is installed on the mounting plate. Located below the reserved hole, the mounting plate is rotatably mounted with a push rod (516), and a protrusion (517) is fixedly connected to the push rod (516). The conveying assembly (6) includes a conveying pipe (61) and a conveying auger (62). The conveying pipe (61) is mounted above the hopper (511), and a conveying auger (62) is installed inside the conveying pipe (61). The outer surface of the conveying pipe (61) is connected to a feed funnel (63) for feeding alloy materials.

9. The preparation process of nickel-chromium-iron alloy material according to claim 8, characterized in that: The preheating component (7) includes a first pipe (71) and a second pipe (77). The exhaust pipe (54) has a first pipe (71) and a second pipe (77) installed on both sides respectively. A water pump (72) is installed on the first pipe (71). The water pump (72) draws water from the water tank (8) into the first pipe (71) through the inlet pipe (73). Several heat exchangers (74) are inserted inside the exhaust pipe (54). The heat exchangers (74) include an inner pipe (742), an outer pipe (741), and a branch pipe (743). The branch pipe (743) is connected to the first pipe (71) to introduce water into the inner pipe (742). Inside the outer tube (741), the inner tube (742) is placed inside the outer tube (741) and the inner tube (742) is open from top to bottom. The outer tube (741) is inserted into the exhaust pipe (54). The exhaust pipe (54) is equipped with a transfer pool (75). The opening of the outer tube (741) is located inside the transfer pool (75). The transfer pool (75) is equipped with several conduits (76) to guide water into the second pipe (77). One end of the second pipe (77) is connected to a preheating pipe (78). The end of the preheating pipe (78) away from the second pipe (77) is spirally wound around the outer surface of the conveying pipe (61) and then connected to the water tank (8).

10. A nickel-chromium-iron alloy material, characterized in that: The nickel-chromium-iron alloy material preparation process according to any one of claims 1-9 includes Ni 72%, Cr 14-17%, Fe 6-10%, C≤0.15%, Mn≤1.0%, Si≤0.5%, and S≤0.015%.

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