A horizontal rotary refining furnace and a method for preparing an aluminum-titanium-boron master alloy

Abstract

The present invention discloses a horizontal rotary refining furnace and a method for preparing aluminum-titanium-boron master alloy using the refining furnace. The horizontal rotary refining furnace includes: a horizontal furnace body and a support frame. The horizontal furnace body is a closed cavity, and only one switchable valve is provided at the top as the feeding and discharging channel, reducing heat loss and better discharging the liquid slag on the surface. On the other hand, the present invention can achieve high-speed rotation of the melt in the furnace by providing a rotating shaft, so that the melt is dispersed evenly, and also avoids the problem of introducing impurities by using traditional carbon rod mechanical stirring, improving the product quality. The design of the surrounding support frame can avoid potential safety hazards caused by equipment failures of the melt in the furnace and provide a certain degree of protection for the staff. The horizontal rotary refining furnace of the present invention has a simple structure and convenient operation, and the method for preparing aluminum-titanium-boron master alloy using the refining furnace is suitable for industrial production.

Description

Technical Field

[0001] The present invention relates to the field of smelting furnace equipment, and particularly to a refining device and method suitable for producing aluminum-titanium-boron master alloy by the fluoride salt reaction method. Background Art

[0002] The smelting furnace uses a 200 - 2500 Hz intermediate frequency power supply for induction heating, with a power range of 20 - 2500 KW, and can also be called an intermediate frequency electric furnace according to its characteristics. When the traditional smelting furnace produces aluminum-titanium-boron master alloy, its overall stability is often poor. At the same time, the traditional smelting furnace has an open structure, and during the hot melting process, it is extremely easy to cause heat loss inside the smelting furnace. In the traditional fluoride salt reaction method for producing aluminum-titanium-boron master alloy, in order to make the reaction of fluoride salt more sufficient and uniform, mechanical stirring is often required with carbon rods or titanium rods. The carbon rods have a short service life during use and will introduce impurities, while the titanium rods have the disadvantage of being too costly. Mechanical stirring is also very difficult to make the distribution of the second-phase microscopic particles inside the melt uniform.

[0003] The existing technologies have the following deficiencies: In the traditional fluoride salt reaction method for producing aluminum-titanium-boron master alloy, mechanical stirring is often required with carbon rods or titanium rods. The carbon rods have a short service life during use and will introduce impurities, while the titanium rods have the disadvantage of being too costly. Mechanical stirring is also very difficult to make the distribution of the second-phase microscopic particles inside the melt uniform. And the traditional mechanical stirring needs to be carried out outdoors, which is easy to cause the melt to splash and poses a safety hazard to construction workers. Summary of the Invention

[0004] In order to solve the problems existing in the prior art, the present invention proposes a horizontal refining furnace and a method for preparing aluminum-titanium-boron master alloy using this refining furnace.

[0005] Specifically, a horizontal rotary refining furnace provided by the present invention includes a support frame and a furnace body. The furnace body is a closed cavity, which is horizontal, and a switchable valve is provided at its top, and a thermal resistance coil is provided inside. The support frame is in a concave shape, including a base and a pedestal. The furnace body is installed in the groove of the support frame through a rotating shaft and keeps a certain distance from the base of the support frame. The support frame surrounds the furnace body. One end of the rotating shaft passes through a bearing and is connected to the furnace body, and the other end is connected to a driving motor. The driving motor is embedded in the pedestal, and the furnace body rotates through the rotation of the bearing. The bearing is fixedly connected to the support frame.

[0006] Preferably, the bearing is fixed on the base of the support frame through a bearing seat. The bearing can also be fixedly connected to the pedestal of the support frame by welding 8 support columns.

[0007] Preferably, the 8 support columns all adopt a split structure, are fixed at both ends of the furnace body, are connected to the pedestal, and the support columns are spaced 90 degrees apart.

[0008] Preferably, the furnace wall of the furnace body is designed in three layers. The outermost layer is the outer wall of the furnace body, the middle layer is the heat insulation layer, and the innermost layer is the thermal insulation layer, which increases the heat preservation performance of the furnace body.

[0009] Preferably, the thermal resistance coil in the furnace body is connected to a frequency converter, and the frequency converter is installed outside the furnace body. The frequency converter can accelerate the melting speed of the metal in the furnace body.

[0010] Preferably, a thermocouple is provided at the inner side where the furnace body is connected to the rotating shaft for detecting the real-time temperature.

[0011] Preferably, the rotating shaft is directly driven by a driving motor to rotate, so its rotation speed is stable, and automatic rotation and manual control rotation during the reaction process can be achieved. Preferably, the rotation speed of the driving motor can be adjusted through the motor control terminal.

[0012] Preferably, a switchable window is provided on one side of the base for connecting the feeding pipeline and the furnace body, and a pipeline for discharging materials is connected through the window, which facilitates the subsequent processing procedures.

[0013] Using the above horizontal rotary refining furnace to prepare the aluminum-titanium-boron master alloy, specifically including the following steps:

[0014] (1) Melting of aluminum ingots: Industrial pure aluminum with a purity of 99.7% is added to the furnace body through a valve, and the furnace body temperature is set to 730 - 800 °C until it is completely melted;

[0015] (2) Adding fluoride salts: Potassium hexafluorotitanate and potassium tetrafluoroborate are weighed according to the mass ratio of Ti and B of 5:1, uniformly mixed, and then added to the melting furnace in two batches for reaction;

[0016] (3) Alloying reaction: After each batch of feeding, the driving motor is started to drive the furnace body to rotate to make the reaction proceed fully. The rotation speed is 15 - 40 r / min, and the rotation time of the furnace body each time is 10 min;

[0017] (4) After all the fluoride salts are added and the reaction is complete, the driving motor is manually controlled to drive the furnace body to rotate so that the valve is located at the top of the furnace body. At this time, the valve is opened, and after connecting the discharging device, the furnace body is rotated to discharge the upper-layer by-products in the furnace;

[0018] (5) The molten liquid after the treatment in step (4) is the Al-5Ti-1B master alloy melt. The discharging device is connected again to rotate the furnace body, and the temperature is controlled by water cooling during discharging. The melt is introduced into an automatic wheel-type casting machine and pressed into lead screws to obtain the Al-5Ti-1B aluminum alloy grain refiner.

[0019] Compared with the prior art, the beneficial effects of the present invention:

[0020] (1)The horizontal rotary refining furnace of the present invention is for the production of aluminum-titanium-boron master alloy by the fluorosalt method. During the reaction process, potassium fluoroaluminate liquid is generated and floats on the surface of the melt. There is only a switchable valve at the top as the feeding and discharging channel, which reduces heat loss and can better discharge the liquid slag on the surface. On the other hand, by providing a rotating shaft, the present invention can achieve high-speed rotation of the melt in the furnace, thereby making the melt evenly dispersed and avoiding the problem of introducing impurities by using traditional carbon rod mechanical stirring, improving the product quality.

[0021] (2)Through the protective system provided with a base, using the base and the enclosed furnace body, heat loss during production is reduced, ensuring the overall heat melting effect. And with the support of the base and the support columns for the furnace body, the stable rotation of the furnace body can be ensured. At the same time, splashing of the liquid during the internal heating process of the furnace body can be avoided, protecting the staff.

[0022] (3)By setting a driving motor to drive the rotation of the furnace body, the present invention can effectively achieve the stratified discharging of by-products and products in the fluorosalt reaction method, improving the overall use effect and the overall applicability of the device. Description of the Drawings

[0023] Figure 1 It is a schematic diagram of the device of the present invention.

[0024] Figure 2 It is a schematic diagram of the usage state of the device in Example 5 and Example 6 of the present invention.

[0025] Figure 3 It is a comparison chart of the refinement effect of aluminum alloy between Example 6 and Comparative Example 1.

[0026] Reference numerals: 1 base, 2 support column, 3 furnace body, 4 frequency converter, 5 valve, 6 rotating shaft, 7 motor control end, 8 base, 9 thermocouple. Detailed Embodiments

[0027] To make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. The described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents the selected embodiments of the present invention.

[0028] For those technical details or conditions not specified in the examples, they shall be in accordance with the techniques or conditions described in the literature in this field or in accordance with the product specifications. For reagents or instruments whose manufacturers are not specified, they are all conventional products that can be purchased on the market.

[0029] As Figure 1 shown, a horizontal rotary refining furnace includes a support frame and a furnace body 3. The furnace body 3 is horizontal and is a sealed cavity. A switchable valve 5 is provided at its top end, and a thermal resistance coil (not shown in the figure) is provided inside; the support frame is in a concave shape and includes a base 8 and a pedestal 1; the furnace body 3 is installed in the groove of the support frame through a rotating shaft 6 and is kept at a certain distance from the base 8 of the support frame, and the support frame surrounds the furnace body 3; one end of the rotating shaft 6 penetrates through a bearing and is connected to the furnace body 3, and the other end is connected to a driving motor (not shown in the figure). The driving motor is embedded in the pedestal 1, and the furnace body 3 rotates through the rotation of the bearing; the bearing is fixedly connected to the support frame. The rotating shaft 6 is directly driven by the driving motor to rotate, so its rotation speed is stable, and automatic rotation and manual control rotation during the reaction process can be realized. Preferably, the rotation speed of the driving motor can be adjusted through the motor control end 7. The support frame surrounds the furnace body 3, on the one hand, playing a role of fixing and supporting, and on the other hand, effectively avoiding danger to construction personnel due to failures.

[0030] As Figure 1 shown, the bearing is fixedly connected to the pedestal 1 of the support frame by welding 8 support columns 2. Among them, the 8 support columns 2 all adopt a split structure, are fixed at both ends of the furnace body 3, are connected to the pedestal 1, and are connected to the rotating shafts 6 at both ends of the furnace body 3, and the support columns 2 are spaced 90 degrees apart. The bearing can also be fixed on the base 8 of the support frame through a bearing seat.

[0031] Preferably, the furnace wall of the furnace body 3 is designed in three layers. The outermost layer is the outer wall of the furnace body, the middle layer is the heat insulation layer, and the innermost layer is the heat preservation layer, increasing the heat preservation property of the furnace body 3.

[0032] The thermal resistance coil in the furnace body 3 is connected to a frequency converter 4, and the frequency converter 4 is installed outside the furnace body 3. The frequency converter 4 can accelerate the melting speed of the metal in the furnace body 3.

[0033] A thermocouple 9 is provided at the inner side where the furnace body 3 is connected to the rotating shaft 6 for detecting the real-time temperature.

[0034] Examples 1 to 6 are preferred examples for preparing the Al-5Ti-1B master alloy refiner using the horizontal rotary refining furnace of the present invention.

[0035] When the horizontal rotary refining furnace is in use, first, industrial pure aluminum is conveyed into the furnace body for melting treatment. At the same time, the frequency converter 4 is turned on to accelerate the melting speed inside the furnace body. The valve 5 at the top of the furnace body is opened to add aluminum ingots. After the industrial pure aluminum is completely melted, the real-time temperature is monitored through the thermocouple 9. When the temperature rises to the set temperature, the frequency converter 4 is turned off to stop the temperature rise inside the furnace. The valve 5 is opened again to add pre-mixed potassium hexafluorotitanate (K2TiF6) and potassium tetrafluoroborate (KBF4). Then, the driving motor is turned on to drive the furnace body to rotate at a speed of 15 - 40 r / min. After the melt in the furnace has completely reacted, the driving motor is manually controlled to rotate the valve 5 back to the top of the furnace body. Then, the valve 5 is opened, and the discharging device is installed. The discharging is controlled by the rotation of the furnace body to discharge the by-products and products in sequence.

[0036] The equipment of the present invention is for the production of aluminum-titanium-boron master alloy by the fluoride salt method. During the reaction process, potassium hexafluoroaluminate liquid will be generated and float on the surface of the melt. The top valve is used as the discharging port instead of being set at both ends of the furnace body in order to better discharge the liquid slag on the surface layer. If the discharging port is set at both ends or the bottom of the furnace body, the liquid slag cannot be completely discharged, which will affect the product quality. Example 1

[0037] (1) 100 kg of industrial pure aluminum with a purity of 99.7% is added into the furnace body 3 through the valve 5. The temperature of the furnace body 3 is set at 730 °C until the aluminum is completely melted.

[0038] (2) 26 kg of potassium hexafluorotitanate and 12 kg of potassium tetrafluoroborate are evenly mixed and added to the melting furnace in two batches for reaction; the two batches of feeding can be equal or unequal, and are adjusted according to needs.

[0039] (3) After each batch of feeding, the driving motor is controlled to drive the furnace body 3 to rotate to make the reaction proceed fully at a speed of 15 r / min, and the rotation time of the furnace body each time is 10 min.

[0040] (4) After all the fluoride salts are added and the reaction is completed, the driving motor is manually controlled to drive the furnace body 3 to rotate so that the valve 5 is located at the top of the furnace body 3. At this time, the valve 5 is opened, and after connecting the discharging device, the furnace body 3 is rotated to discharge the upper-layer by-products in the furnace.

[0041] (5) The molten liquid after the treatment in step (4) is the Al-5Ti-1B master alloy melt. Therefore, by connecting the discharging device and the subsequent casting machine and rotating the furnace body for discharging, the temperature is controlled by water cooling during discharging and introduced into the automatic wheel-type casting machine, and pressed into lead screws to obtain an Al-5Ti-1B aluminum alloy grain refiner with a uniform secondary particle distribution and good refinement effect. Example 2

[0042] (1) Add 100 kg of industrial pure aluminum with a purity of 99.7% to the furnace body 3 through the valve 5. Set the temperature of the furnace body 3 to 750 °C until the aluminum is completely melted;

[0043] (2) After uniformly mixing 26 kg of potassium hexafluorotitanate and 12 kg of potassium tetrafluoroborate, add them to the melting furnace in two batches for reaction; the two batches of feeding can be equal or unequal, and can be adjusted according to needs;

[0044] (3) After each batch of feeding, control the driving motor to drive the furnace body 3 to rotate to make the reaction proceed fully. The rotation speed is 20 r / min, and the rotation time of the furnace body each time is 10 min;

[0045] (4) After all the fluorine salts are added and the reaction is complete, manually control the driving motor to drive the furnace body 3 to rotate so that the valve 5 is located at the top of the furnace body 3. At this time, open the valve 5, connect the discharging device, and then rotate the furnace body 3 to discharge the upper-layer by-products in the furnace;

[0046] (5) The molten liquid after the treatment in step (4) is the Al-5Ti-1B master alloy melt. Therefore, connect the discharging device and the subsequent casting machine and rotate the furnace body for discharging. During discharging, control the temperature through water cooling and introduce it into the automatic wheel-type casting machine, and press it into a lead screw to obtain an Al-5Ti-1B aluminum alloy grain refiner with a uniform secondary particle distribution and good refinement effect. Example 3

[0047] (1) Add 100 kg of industrial pure aluminum with a purity of 99.7% to the furnace body 3 through the valve 5. Set the temperature of the furnace body 3 to 780 °C until the aluminum is completely melted;

[0048] (2) After uniformly mixing 26 kg of potassium hexafluorotitanate and 12 kg of potassium tetrafluoroborate, add them to the melting furnace in two batches for reaction; the two batches of feeding can be equal or unequal, and can be adjusted according to needs;

[0049] (3) After each batch of feeding, control the driving motor to drive the furnace body 3 to rotate to make the reaction proceed fully. The rotation speed is 25 r / min, and the rotation time of the furnace body each time is 10 min;

[0050] (4) After all the fluorine salts are added and the reaction is complete, manually control the driving motor to drive the furnace body 3 to rotate so that the valve 5 is located at the top of the furnace body 3. At this time, open the valve 5, connect the discharging device, and then rotate the furnace body 3 to discharge the upper-layer by-products in the furnace;

[0051] (5) The molten liquid after the treatment in step (4) is the Al-5Ti-1B master alloy melt. Therefore, the discharging is carried out by connecting the discharging device and the subsequent casting machine and rotating the furnace body. During discharging, temperature control is carried out through water cooling and it is introduced into the automatic wheel type casting machine, and pressed into a lead screw to obtain the Al-5Ti-1B aluminum alloy grain refiner with uniform secondary particle distribution and good refinement effect. Example 4

[0052] (1) 100 kg of industrial pure aluminum with a purity of 99.7% is added to the furnace body 3 through the valve 5, and the temperature of the furnace body 3 is set at 800 °C until the aluminum is completely melted.

[0053] (2) After uniformly mixing 26 kg of potassium fluotitanate and 12 kg of potassium fluoroborate, they are added to the melting furnace in two batches for reaction; the two batches of feeding can be equal or unequal, and are adjusted according to needs.

[0054] (3) After each batch of feeding, the furnace body 3 is rotated by controlling the driving motor to make the reaction proceed fully. The rotation speed is 30 r / min, and the rotation time of the furnace body each time is 10 min.

[0055] (4) After all the fluorides are added and the reaction is complete, the furnace body 3 is rotated by manually controlling the driving motor to make the valve 5 located at the top of the furnace body 3. At this time, the valve 5 is opened, and after connecting the discharging device, the furnace body 3 is rotated to discharge the upper by-products in the furnace.

[0056] (5) The molten liquid after the treatment in step (4) is the Al-5Ti-1B master alloy melt. Therefore, the discharging is carried out by connecting the discharging device and the subsequent casting machine and rotating the furnace body. During discharging, temperature control is carried out through water cooling and it is introduced into the automatic wheel type casting machine, and pressed into a lead screw to obtain the Al-5Ti-1B aluminum alloy grain refiner with uniform secondary particle distribution and good refinement effect. Example 5

[0057] (1) 100 kg of industrial pure aluminum with a purity of 99.7% is added to the furnace body 3 through the valve 5, and the temperature of the furnace body 3 is set at 750 °C until the aluminum is completely melted.

[0058] (2) After uniformly mixing 26 kg of potassium fluotitanate and 12 kg of potassium fluoroborate, they are added to the melting furnace in two batches for reaction.

[0059] (3) After each batch of feeding, the furnace body 3 is rotated by controlling the driving motor to make the reaction proceed fully. The rotation speed is 35 r / min, and the rotation time of the furnace body each time is 10 min.

[0060] After all the fluorides are added and the reaction is complete, manually control the drive motor to rotate the furnace body 3 so that the valve 5 is located at the top of the furnace body 3. At this time, open the valve 5, connect the discharging device, and then rotate the furnace body 3 to discharge the upper by-products in the furnace.

[0061] (5)The molten liquid after the treatment in step (4) is the Al-5Ti-1B master alloy melt. Therefore, connect the discharging device and the subsequent casting machine and rotate the furnace body to discharge the material. During discharging, control the temperature through water cooling and introduce it into the automatic wheel casting machine, and press it into a lead screw to obtain the Al-5Ti-1B aluminum alloy grain refiner with uniform secondary particle distribution and good refinement effect. Example 6

[0062] (1)Add 100 kg of industrial pure aluminum with a purity of 99.7% to the furnace body 3 through the valve 5, and set the temperature of the furnace body 3 to 750 °C until the aluminum is completely melted.

[0063] (2)Mix 26 kg of potassium fluotitanate and 12 kg of potassium fluoroborate evenly, and add them to the furnace in two equal batches for reaction.

[0064] (3)After each batch of feeding, control the drive motor to drive the furnace body 3 to rotate to make the reaction proceed fully. The rotation speed is 40 r / min, and the rotation time of the furnace body each time is 10 min.

[0065] (4)After all the fluorides are added and the reaction is complete, manually control the drive motor to rotate the furnace body 3 so that the valve 5 is located at the top of the furnace body 3. At this time, open the valve 5, connect the discharging device, and then rotate the furnace body 3 to discharge the upper by-products in the furnace.

[0066] (5)The molten liquid after the treatment in step (4) is the Al-5Ti-1B master alloy melt. Therefore, connect the discharging device and the subsequent casting machine and rotate the furnace body to discharge the material. During discharging, control the temperature with water cooling and introduce it into the automatic wheel casting machine, and press it into a lead screw to obtain the Al-5Ti-1B aluminum alloy grain refiner with uniform secondary particle distribution and good refinement effect.

[0067] Comparative Example 1

[0068] (1)Place 100 kg of industrial pure aluminum with a purity of 99.7% in an intermediate frequency furnace and heat it to 730 - 800 °C until the aluminum is completely melted.

[0069] (2)Mix 26 kg of potassium fluotitanate and 12 kg of potassium fluoroborate evenly, and add them to the furnace in two equal batches for reaction.

[0070] (3)After each batch of feeding, mechanically stir with a carbon rod to make the reaction proceed fully. The rotation speed is 100 r / min, and the stirring time of the carbon rod each time is 10 min.

[0071] After all the fluorides are added and fully reacted, let it stand for 10 min, and pour the by-products on its surface by tilting the furnace body.

[0072] (5) The melt after the treatment in step (4) is the Al-5Ti-1B master alloy melt. It is discharged through the discharge port at the bottom of the furnace body. During discharging, the temperature is controlled by water cooling and introduced into an automatic wheel casting machine, and pressed into lead screws to obtain an Al-5Ti-1B aluminum alloy grain refiner with uniform secondary particle distribution and good refinement effect.

[0073] The quality of the aluminum-titanium-boron master alloy prepared by this experimental device is good. Among them, in Example 5 and Example 6, high-quality products can be obtained under high-speed rotation, such as Figure 2 As shown, under the observation of a scanning electron microscope, the microscopic particles TiB2 inside the refiner are evenly distributed, and the equivalent diameter of the Al3Ti particles is about 25 μm.

[0074] An experiment on the refinement effect verification was carried out by comparing the refiner prepared by the traditional carbon rod stirring process in Example 6 with Comparative Example 1, and the Figure 3 results shown were obtained. The left figure is the refinement effect prepared in Example 6, and the right figure is the refinement effect of the refiner prepared by the traditional carbon rod stirring process (Comparative Example 1). It can be seen that the refinement effect of the product of the present invention is better than that of the mechanical stirring method, and the influence of impurities introduced by the carbon rod and air is eliminated.

[0075] The above is only the preferred implementation mode of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions falling within the idea of the present invention belong to the protection scope of the present invention. It should be pointed out that for those of ordinary skill in the art, several improvements and retouches made without departing from the principle of the present invention should also be regarded as within the protection scope of the present invention.

Claims

1. A preparation method of an aluminum-titanium-boron alloy grain refiner, characterized in that, Prepared by a horizontal rotary refining furnace, the horizontal rotary refining furnace includes a support frame and a furnace body (3). The furnace body (3) is a closed cavity, horizontal in shape, with a switchable valve (5) provided at its top and a thermal resistance coil inside. The support frame is concave in shape, including a base (8) and a pedestal (1). The furnace body (3) is installed in the groove of the support frame through a rotating shaft (6) and keeps a certain distance from the base (8) of the support frame. The support frame surrounds the furnace body. One end of the rotating shaft (6) penetrates through a bearing and is connected to the furnace body (3), and the other end is connected to a driving motor. The driving motor is embedded in the pedestal (1). The furnace body (3) rotates through the rotation of the bearing. The bearing is fixedly connected to the support frame. Specifically, it includes the following steps: (1) Melting of aluminum ingots: Commercially pure aluminum with a purity of 99.7% is added to the furnace body through the valve. The temperature of the furnace body is set to 730 - 800 °C until it is completely melted. (2) Adding fluoride salts: Potassium hexafluorotitanate and potassium tetrafluoroborate are weighed according to the mass ratio of Ti and B of 5:1, evenly mixed, and then added to the melting furnace in two batches for reaction. (3) Alloying reaction: After each batch of feeding, the driving motor is started to drive the furnace body to rotate to make the reaction proceed fully. The rotation speed is 15 - 40 r / min, and the rotation time of the furnace body each time is 10 min. (4) After all the fluoride salts are added and the reaction is sufficient, the driving motor is manually controlled to drive the furnace body to rotate so that the valve is at the top of the furnace body. At this time, the valve is opened, and after connecting the discharging device, the furnace body is rotated to discharge the upper by-products in the furnace. (5) The molten liquid after the treatment in step (4) is the Al-5Ti-1B master alloy melt. The discharging device is connected again to rotate the furnace body. During discharging, the temperature is controlled by water cooling. The Al-5Ti-1B master alloy melt is introduced into an automatic wheel-type casting machine and pressed into lead screws to obtain the Al-5Ti-1B aluminum alloy grain refiner.

2. The preparation method of an aluminum-titanium-boron alloy grain refiner according to claim 1, characterized in that, The bearing is fixed on the base (8) of the support frame through a bearing seat.

3. The preparation method of an aluminum-titanium-boron alloy grain refiner according to claim 1, characterized in that, The bearing is fixedly connected to the pedestal (1) of the support frame by welding 8 support columns (2).

4. The preparation method of an aluminum-titanium-boron alloy grain refiner according to claim 3, characterized in that The 8 support columns (2) all adopt a split structure, are fixed at both ends of the furnace body (3), and are connected to the pedestal (1). The support columns (2) are spaced 90 degrees apart.

5. The preparation method of an aluminum-titanium-boron alloy refiner according to claim 1, characterized in that, The thermal resistance coil inside the furnace body is connected to a frequency converter (4), and the frequency converter (4) is installed outside the furnace body.

6. The preparation method of an aluminum-titanium-boron alloy grain refiner according to claim 1, characterized in that, A thermocouple is provided at the inner side where the furnace body is connected to the rotating shaft (6) for detecting the real-time temperature.

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