Titanium material hot straightening cooling device and hot straightening cooling process

Abstract

The present application belongs to the technical field of anode material preparation, and particularly relates to a titanium material hot calibrating cooling device and a hot calibrating cooling process. The device comprises a hot calibrating furnace, a cooling chamber, a moving mechanism and an electric control system. The moving mechanism comprises a linear track, a moving base and a winch. The hot calibrating furnace and the cooling chamber are arranged above the linear track. The moving base is slidingly installed on the linear track and located on the side of the hot calibrating furnace away from the cooling chamber. The winch is arranged on the side of the cooling chamber away from the hot calibrating furnace. The winch is connected to the moving base through a rope. Lifting doors are arranged on the two sides of the hot calibrating furnace perpendicular to the linear track and on the two sides of the cooling chamber perpendicular to the linear track. The temperature of the heating furnace wire of the hot calibrating furnace does not need to be reduced. The lifting doors are controlled to rise and fall and the winch is controlled to work through the electric control system. The rapid switching of the calibrated products can be realized. Time and electric energy are saved. The continuity, efficiency and rapidity of the calibration work are ensured.

Description

Technical Field

[0001] This invention belongs to the field of anode material preparation technology, specifically relating to a titanium material thermal straightening and cooling device and thermal straightening and cooling process. Background Technology

[0002] Coated titanium electrodes, also known as metal anodes, are a new type of high-efficiency anode material developed in the late 1960s. They consist of a titanium substrate coated with an enamel-electrocatalytic-semiconductor coating, resulting in an anode with excellent corrosion resistance and conductivity. The greatest advantages of titanium as an anode substrate are its excellent chemical durability and machinability.

[0003] In the preparation of titanium anodes, the cut and shaped titanium material undergoes surface sandblasting to increase the roughness of the titanium substrate and improve the adhesion between the anode coating and the titanium substrate. However, the extremely high sandblasting pressure can cause severe deformation of the titanium substrate, affecting the processing and application of the anode material. Therefore, a thermal straightening process is indispensable in the preparation of titanium anode materials.

[0004] In recent years, with the rapid development of the market, the requirements for the quality of titanium-based active coating anodes have become increasingly stringent. These requirements demand not only excellent performance but also a perfect appearance, such as a flatness of ≤0.2mm, and timely delivery of the anode materials. However, the production process of anode materials is extremely complex, involving various stages such as material slitting, sandblasting, hot straightening, acid etching, and coating. Each stage significantly impacts electrode performance, especially the hot straightening stage, which has a tremendous destructive effect on the microstructure and structure of the titanium substrate. Different microstructures of the titanium substrate (such as grain size and impurity content) result in different anode properties. Furthermore, the hot straightening stage is the most time-consuming, generally taking ≥14 days, accounting for approximately 2 / 3 of the entire anode material production cycle, with the cooling stage alone taking more than 12 days. Therefore, there is an urgent need to provide a titanium material hot straightening and cooling device and process that can both ensure excellent performance of the anode material and shorten its production cycle. Summary of the Invention

[0005] To address the problems existing in the prior art, the present invention provides a hot-forming and cooling device and a hot-forming and cooling process for titanium materials, and specifically discloses the following technical solutions:

[0006] A titanium material hot-calibration cooling device includes a hot-calibration furnace, a cooling chamber, a moving mechanism, and an electrical control system. The moving mechanism includes a linear track, a moving base, and a winch. The hot-calibration furnace and the cooling chamber are spaced apart above the linear track. The moving base is slidably mounted on the linear track and located on the side of the hot-calibration furnace away from the cooling chamber. The winch is located on the side of the cooling chamber away from the hot-calibration furnace and is connected to the moving base via a rope. Lifting doors are provided on both sides of the hot-calibration furnace perpendicular to the linear track and on both sides of the cooling chamber perpendicular to the linear track. Heating wires are installed inside the hot-calibration furnace. A liquid nitrogen inlet is provided at the bottom of the cooling chamber on the side closest to the hot-calibration furnace. The liquid nitrogen inlet is connected to a liquid nitrogen storage tank via a liquid nitrogen input pipe. A flow controller is provided on the liquid nitrogen input pipe. A nitrogen exhaust port is provided at the top of the cooling chamber on the side away from the hot-calibration furnace. The winch, the lifting doors, the heating wires, and the flow controller are all electrically connected to the electrical control system.

[0007] Furthermore, the hot-calibration furnace is equipped with a plurality of first temperature probes, and the cooling chamber is equipped with a plurality of second temperature probes. Both the first and second temperature probes are electrically connected to the electrical control system.

[0008] Furthermore, several fans are installed at the top of the interior of the heat calibration furnace.

[0009] Furthermore, the furnace wall of the heat-calibrating furnace includes, from the inside out, an asbestos layer, a refractory mud layer, and a stainless steel layer, with the heating wires disposed on one side of the asbestos layer inside the furnace.

[0010] Furthermore, the nitrogen outlet is connected to a nitrogen collector via a nitrogen discharge pipe.

[0011] A thermal alignment and cooling process based on any of the above-mentioned titanium material thermal alignment and cooling devices includes the following steps:

[0012] S1. Place the product to be heated and calibrated on the mobile base;

[0013] S2. After placement, open the lifting door on the side of the hot straightening furnace away from the cooling chamber, and drive the moving base into the hot straightening furnace through the winch, then close the lifting door on the side of the hot straightening furnace away from the cooling chamber.

[0014] S3. Start the heating wires in the hot-calibration furnace and heat it to 600℃ at a rate of 5℃ / min, and hold it at that temperature for 4 hours;

[0015] S4. Turn off the heating coils and simultaneously open the two lifting doors on the side of the cooling chamber and the hot calibration furnace that are close to each other. Move the calibrated product into the cooling chamber and close the lifting door of the cooling chamber.

[0016] S5. Open the liquid nitrogen inlet. Liquid nitrogen enters the cooling chamber at a certain rate. The product cools down to 450-500℃ within 8-10 hours. Adjust the liquid nitrogen flow rate through the flow controller. The product continues to cool down to 300-350℃ within 4-5 hours. Continue to adjust the liquid nitrogen flow rate. The product cools down to 200-250℃ within 2-3 hours. Continue to adjust the liquid nitrogen flow rate to ensure that the product cools down to below 100℃ within 1 hour.

[0017] S6. Open the lifting door on the side of the cooling chamber away from the hot calibration furnace and remove the cooled product from the cooling chamber.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] (1) The titanium material hot-calibration cooling device provided by the present invention can perform batch-cycle hot calibration of products. Compared with traditional hot calibration, the heating wire temperature of the hot calibration furnace in the present invention does not need to be reduced. The lifting and lowering of the lifting door and the operation of the winch can be controlled by the electric control system to realize the rapid switching of calibration products, saving time and energy, and ensuring the continuity, efficiency and speed of calibration work.

[0020] (2) The titanium material hot-straightening cooling device provided by the present invention adopts liquid nitrogen gradient cooling, which not only ensures that the microstructure and properties of the titanium substrate are not affected, but also ensures the continuous gradient cooling rate of the titanium material, shortens the time required for hot-straightening cooling, and also reduces the thickness of the oxide scale on the surface of the straightened product to a certain extent, thus reducing the pressure on subsequent acid treatment. Attached Figure Description

[0021] Figure 1 This is a front view of the present invention.

[0022] Figure 2 This is a top view of the present invention.

[0023] 1-Hot calibrating furnace, 2-Cooling chamber, 3-Linear track, 4-Moving base, 5-Windmill, 6-Lifting door, 7-Liquid nitrogen inlet, 8-Nitrogen outlet. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] Reference Figure 1-2A titanium material hot-setting and cooling device includes a hot-setting furnace 1, a cooling chamber 2, a moving mechanism, and an electrical control system. The moving mechanism includes a linear track 3, a moving base 4, and a winch 5. The hot-setting furnace 1 and the cooling chamber 2 are spaced apart above the linear track 3. The moving base 4 is slidably mounted on the linear track 3 and located on the side of the hot-setting furnace 1 away from the cooling chamber 2. The winch 5 is located on the side of the cooling chamber 2 away from the hot-setting furnace 1. The winch 5 is connected to the moving base 4 via a rope. The hot-setting furnace 1 is perpendicular to the linear track 3. Lifting doors 6 are provided on both sides of the cooling chamber 2 and on both sides perpendicular to the linear track 3. Heating wires are provided inside the hot-calibrating furnace 1. A liquid nitrogen inlet 7 is provided at the bottom of the side of the cooling chamber 2 closest to the hot-calibrating furnace 1. The liquid nitrogen inlet 7 is connected to the liquid nitrogen storage tank through a liquid nitrogen input pipe. A flow controller is provided on the liquid nitrogen input pipe. A nitrogen outlet 8 is provided at the top of the side of the cooling chamber 2 away from the hot-calibrating furnace 1. The winch 5, the lifting doors 6, the heating wires, and the flow controller are all electrically connected to the electrical control system.

[0026] In this embodiment, a preparation area is provided on the side of the hot calibration furnace 1 away from the cooling chamber 2. The movable base 4 is located in the preparation area before the device is put into operation. The interval between the preparation area and the hot calibration furnace 1 is 500mm-1000mm, and the interval between the hot calibration furnace 1 and the cooling chamber 2 is 500mm-1000mm.

[0027] In this embodiment, the hot-calibration furnace 1 is equipped with several first temperature probes, and the cooling chamber 2 is equipped with several second temperature probes. Both the first and second temperature probes are electrically connected to the electronic control system. The first and second temperature probes can monitor the temperatures in the hot-calibration furnace 1 and the cooling chamber 2 in real time, respectively. The electronic control system adjusts the heating elements and flow controller, thereby precisely controlling the heating rate in the hot-calibration furnace 1 and the cooling rate in the cooling chamber 2.

[0028] In this embodiment, several fans are installed at the top of the interior of the hot calibrating furnace 1 to ensure that heat is evenly distributed throughout the entire hot calibrating furnace 1.

[0029] In this embodiment, the furnace wall of the heat-calibrating furnace 1 includes, from the inside out, an asbestos layer, a refractory mud layer, and a stainless steel layer, and the heating wire is disposed on the side of the asbestos layer located inside the furnace.

[0030] In this embodiment, the nitrogen outlet 8 is connected to a nitrogen collector via a nitrogen discharge pipe for collecting and processing nitrogen.

[0031] A thermal alignment and cooling process based on any of the above-mentioned titanium material thermal alignment and cooling devices includes the following steps:

[0032] S1. Place the product to be heated and calibrated on the mobile base 4;

[0033] S2. After placement, open the lifting door 6 on the side of the hot straightening furnace 1 away from the cooling chamber 2, drive the moving base 4 into the hot straightening furnace 1 through the winch 5, and then close the lifting door 6 on the side of the hot straightening furnace 1 away from the cooling chamber 2.

[0034] S3. Start the heating wires in the hot calibration furnace 1 and heat it to 600℃ at a rate of 5℃ / min, and keep it at that temperature for 4 hours;

[0035] S4. Turn off the heating coils and simultaneously open the two lifting doors 6 on the side of the cooling chamber 2 and the hot straightening furnace 1 that are close to each other. Move the straightened product into the cooling chamber 2 and close the lifting door 6 of the cooling chamber 2.

[0036] S5. Open the liquid nitrogen inlet 7. Liquid nitrogen enters the cooling chamber 2 at a certain rate. The product cools down to 450-500℃ within 8-10 hours. Adjust the liquid nitrogen flow rate through the flow controller. The product continues to cool down to 300-350℃ within 4-5 hours. Continue to adjust the liquid nitrogen flow rate. The product cools down to 200-250℃ within 2-3 hours. Continue to adjust the liquid nitrogen flow rate to ensure that the product cools down to below 100℃ within 1 hour.

[0037] S6. Open the lifting door 6 on the side of the cooling chamber 2 away from the hot calibrating furnace 1, and remove the cooled product from the cooling chamber 2.

[0038] In this embodiment, in step S1, the method for placing the products to be heat-calibrated is as follows: the products to be heat-calibrated are neatly stacked in groups of 30 on the mobile base 4, and n stacks are placed. The number of n is determined by the size of the products and the size of the mobile base 4. Then, a stainless steel plate with the same size as the mobile base 4 and a weight of 3 tons is placed on the products to be heat-calibrated by means of an overhead crane. The products to be calibrated are then neatly stacked in groups of 30 on the stainless steel plate, and n stacks are placed. This process is repeated until the desired height is reached, and the final total height of the products to be heat-calibrated and the stainless steel plate is less than the height of the inner diameter of the heat-calibrating furnace 1.

[0039] In this embodiment, after the products awaiting heat calibration in the preparation area enter the heat calibration furnace 1, the next batch of products awaiting heat calibration can be placed on the new movable base 4 in the preparation area. After the products in the heat calibration furnace 1 have completed heat calibration and been transferred to the cooling chamber 2, the next batch of products awaiting heat calibration can continue to be moved into the heat calibration furnace 1 for calibration. Similarly, after the products that have been cooled are moved out of the cooling chamber 2, the next batch of products that have completed heat calibration can continue to be moved into the cooling chamber 2 for cooling, and so on in a cycle.

[0040] The above description is merely a preferred embodiment of the present invention and does not constitute any limitation on the technical scope of the present invention. Therefore, any minor modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. A cooling device for hot straightening of a titanium material, characterized in that, The application relates to a heat-treatment and shaping furnace which comprises a heat-treatment and shaping furnace, a cooling chamber, a moving mechanism and an electric control system, wherein the moving mechanism comprises a linear track, a moving base and a winch, the heat-treatment and shaping furnace and the cooling chamber are arranged above the linear track, the moving base is slidably arranged on the linear track and located on the side of the heat-treatment and shaping furnace away from the cooling chamber, the winch is arranged on the side of the cooling chamber away from the heat-treatment and shaping furnace, the winch is connected with the moving base through a rope, lifting doors are arranged on the two sides of the heat-treatment and shaping furnace perpendicular to the linear track and on the two sides of the cooling chamber perpendicular to the linear track, heating furnace wires are arranged in the heat-treatment and shaping furnace, a liquid nitrogen feeding port is arranged at the bottom of the side of the cooling chamber close to the heat-treatment and shaping furnace, the liquid nitrogen feeding port is communicated with a liquid nitrogen storage tank through a liquid nitrogen input pipe, a flow controller is arranged on the liquid nitrogen input pipe, a nitrogen gas discharging port is arranged at the top of the side of the cooling chamber away from the heat-treatment and shaping furnace, and the winch, the lifting doors, the heating furnace wires and the flow controller are electrically connected with the electric control system.

2. The cooling device for thermal straightening of titanium materials according to claim 1, characterized in that A plurality of first temperature measuring probes are arranged in the heat-treatment and shaping furnace, a plurality of second temperature measuring probes are arranged in the cooling chamber, and the first temperature measuring probes and the second temperature measuring probes are electrically connected with the electric control system.

3. The cooling device for thermal straightening of titanium materials according to claim 1, characterized in that A plurality of fans are arranged at the top of the inside of the heat-treatment and shaping furnace.

4. The device according to claim 1, wherein The furnace wall of the heat-treatment and shaping furnace comprises, from inside to outside, an asbestos layer, a refractory clay layer and a stainless steel layer, and the heating furnace wires are arranged on one side of the asbestos layer in the furnace.

5. The device of claim 1, wherein the device is a cooling device for hot straightening of titanium materials. The nitrogen gas discharging port is communicated with a nitrogen gas collector through a nitrogen gas discharging pipe.

6. A thermal straightening cooling process based on the thermal straightening cooling device of any one of claims 1-5, characterized in that, The application further discloses a heat-treatment and shaping method. S1, placing a product to be heat-treated and shaped on the moving base; S2, after the product is placed, opening the lifting door on the side of the heat-treatment and shaping furnace away from the cooling chamber, driving the moving base into the heat-treatment and shaping furnace through the winch, and then closing the lifting door on the side of the heat-treatment and shaping furnace away from the cooling chamber; S3, starting the heating furnace wires in the heat-treatment and shaping furnace, heating at a rate of 5 DEG C / min to 600 DEG C, and keeping the temperature for 4h; S4, closing the heating furnace wires, opening the two lifting doors on the sides of the cooling chamber and the heat-treatment and shaping furnace close to each other, moving the product shaped to the cooling chamber, and closing the lifting door of the cooling chamber; S5, opening the liquid nitrogen feeding port, and entering liquid nitrogen into the cooling chamber at a certain rate, cooling the product to 450-500 DEG C within 8-10h, adjusting the liquid nitrogen flow rate through the flow controller, continuously cooling the product to 300-350 DEG C within 4-5h, continuously adjusting the liquid nitrogen flow rate, cooling the product to 200-250 DEG C within 2-3h, continuously adjusting the liquid nitrogen flow rate, and ensuring that the product is cooled to below 100 DEG C within 1h; S6, opening the lifting door on the side of the cooling chamber away from the heat-treatment and shaping furnace, and moving the cooled product out of the cooling chamber.

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