Lithium-boron alloy heat treatment device

Abstract

The utility model discloses a lithium boron alloy heat treatment device, which relates to the technical field of lithium boron alloy, and comprises an industrial resistance furnace, a tank body and a control cabinet, the tank body is arranged in the industrial resistance furnace, a sealing cover is arranged at the top of the tank body, a heat insulation system and a heat transfer system are arranged in the tank body, and the control cabinet is connected with the industrial resistance furnace. Heating devices are distributed on the periphery of the tank body in the circumferential direction, a vacuum argon system is arranged above the sealing cover, and the heating devices and the vacuum argon system are electrically connected with a control cabinet. The device is safe, reliable, totally closed and pollution-free, the quality of the lithium-boron alloy is improved through automatic heat treatment, particles are heated more uniformly, oil gas is removed more thoroughly, and the heat stability of the lithium-boron alloy is greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to lithium boride alloy technical field, specifically is a lithium boride alloy heat treatment device. BACKGROUND

[0002] As a new generation of lithium battery negative electrode material, lithium boride alloy is more and more paid attention to because of its high voltage and specific capacity, excellent conductivity and thermal stability. Due to the huge difference between raw material battery-grade metal lithium and boron powder in melting point and density, the complex and changeable exothermic process in alloy reaction process, according to the difference of raw material ratio, reaction heat control and stirring condition atmosphere, the lithium boride alloy prepared often appears many defects such as inclusion, hole, segregation, and the uniformity and stability of the product are difficult to realize. In addition, the lithium boride alloy has a loose and porous skeleton lithium intercalation structure, and the chemical property is extremely active, and it is easy to react with nitrogen, oxygen and humid air, so it is extremely difficult to directly prepare uniform and stable lithium boride alloy.

[0003] For the above defects and problems of lithium boride alloy, there is no related device for heat treatment of lithium boride alloy ingot to improve its quality performance in the prior art. Therefore, a lithium boride alloy heat treatment device is needed to solve the above technical problems. INVENTION CONTENTS

[0004] Therefore, the utility model provides a lithium boride alloy heat treatment device, compared with traditional whole ingot heat treatment and slab heat treatment, the utility model is safe and reliable, fully enclosed and pollution-free, improves the lithium boride alloy quality through automatic heat treatment, the particle is heated more uniformly, and the oil gas removal is more thorough, greatly improves the thermal stability of lithium boride alloy.

[0005] In order to realize the above purpose, the utility model adopts the following technical scheme:

[0006] A lithium boride alloy heat treatment device, including industrial resistance furnace, jar body and control cabinet, the jar body is arranged in the inside of industrial resistance furnace, the top of jar body is provided with sealing cover, the inside of jar body is provided with heat insulation system and heat transfer system, the periphery of jar body is distributed with heating device, the top of sealing cover is provided with vacuum argon system, the heating device and vacuum argon system are electrically connected with control cabinet.

[0007] Further, the jar body is also provided with loading tray and loading rack, a plurality of loading trays are arranged on the loading rack, and heat transfer systems are arranged at the upper and lower ends of the loading rack.

[0008] Further, the loading tray and the loading rack are made of stainless steel, the loading tray is welded by stainless steel mesh, and the loading rack is welded by stainless steel rods.

[0009] Further, the heat insulation system comprises a vacuum ring and vacuum blocks, the vacuum ring is arranged at the joint of the tank body and the sealing cover, and the vacuum blocks are distributed below the sealing cover and above the heat transfer system.

[0010] Further, the vacuum argon system comprises a vacuum argon pipeline, a vacuum pipeline ball valve and a vacuum pump, the vacuum pipeline ball valve and the vacuum pump are installed on the vacuum argon pipeline, and the vacuum pipeline ball valve and the vacuum pump are electrically connected with the control cabinet.

[0011] Further, the heat transfer system is a purple copper plate coated with stainless steel and is divided into an upper heat transfer device and a lower heat transfer device, the upper heat transfer device is arranged above the charging rack and adopts multiple purple copper plates stacked and coated with stainless steel, and the lower heat transfer device is arranged below the charging rack and adopts a single purple copper plate coated with stainless steel.

[0012] Further, the industrial resistance furnace adopts stainless steel material, and the tank body, the sealing cover and the vacuum argon system are detachably connected.

[0013] The industrial resistance furnace has the advantages that:

[0014] The industrial resistance furnace is safe and reliable, fully closed and pollution-free, can directly prepare lithium boride alloy particles which are uniform and stable in performance, removes oil gas and impurities in the lithium boride alloy through the vacuum argon pipeline by adopting multiple vacuum argon environment conversion, makes the particle heating more uniform and the oil gas removal more complete, greatly improves the thermal stability of the lithium boride alloy, leaves a space for the particle material to escape oil gas through the charging disc and the charging rack, solves the problem that the oil gas cannot escape in time in the heat treatment link, causing the particle to turn black, the heat transfer system utilizes the high heat transfer coefficient of the purple copper plate, so that the temperature of the material is more uniform during the heat treatment process, and the heat treatment effect is better, and the heat insulation system does not use water resources, has the characteristics of clean production, energy saving and high efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, and obviously, the drawings in the following description are only embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative labor on the basis of the provided drawings.

[0016] Figure 1 It is a schematic view of the overall structure of the present application.

[0017] Figure 2 It is a front view of the charging rack of the present application.

[0018] Figure 3 It is a top view of the charging disc of the present application.

[0019] Figure 4 Figure 2 is a top view of the charging rack of the utility model;

[0020] In the figure, the following are:

[0021] 1-industrial resistance furnace; 2-sealing cover; 3-vacuum argon pipeline; 4-vacuum ring; 5-vacuum block; 6-tank body; 7-up heat transfer device; 8-down heat transfer device; 9-thermocouple; 10-charging rack; 11-charging tray. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0023] Please refer to the drawings Figures 1-4 The utility model provides a lithium boron alloy heat treatment device, including industrial resistance furnace 1, tank body 6 and control cabinet, the tank body 6 sets up in the inside of industrial resistance furnace 1, the top of tank body 6 is provided with sealing cover 2, the inside of tank body 6 is provided with heat insulation system and heat transfer system, the periphery of tank body 6 is distributed with heating device, the top of sealing cover 2 is provided with vacuum argon system, heating device and vacuum argon system are electrically connected with control cabinet, and the industrial resistance furnace 1 of program temperature control can realize automatic gradient temperature rise, and the industrial resistance furnace 1 has gradient temperature rise mechanism, fully reacts the unreacted B particles and free lithium in alloy under the condition of keeping alloy structure unchanged, successfully improves the purity and thermal stability of product, so that the performance of product has been greatly improved.

[0024] Preferably, the tank 6 is also provided with a charging tray 11 and a charging rack 10, the charging rack 10 is provided with a plurality of charging trays 11, and the upper and lower ends of the charging rack 10 are provided with a heat transfer system.

[0025] Preferably, the charging tray 11 and the charging rack 10 are made of stainless steel, the charging tray 11 is welded by stainless steel mesh, and the charging rack 10 is welded by stainless steel rods. After the charging tray 11 is filled with materials, it is placed in the charging rack 10, which is convenient for oil and gas extraction.

[0026] Preferably, the heat insulation system comprises a vacuum ring 4 arranged at the joint of the tank body 6 and the sealing cover 2 and a plurality of vacuum blocks 5 arranged below the sealing cover 2 and above the charging rack 10 and the heat transfer system, the upper part of the charging rack 10 and the heat transfer system being movable heat insulation blocks which can be removed during furnace loading, the vacuum blocks 5 are made by drawing insulation bricks to vacuum to form the vacuum blocks 5, and the vacuum ring 4 is made by drawing a sealing ring to vacuum to form the vacuum ring 4, so as to keep the temperature of the upper part of the industrial resistance furnace 1 within a safe range and prevent high temperature from damaging the rubber material of the vacuum ring 4, the heat insulation system does not use water resources, achieves the goal of clean production, and avoids the risk of material ignition or even explosion caused by water leakage.

[0027] Preferably, the vacuum argon system comprises a vacuum argon pipeline 3, a vacuum pipeline ball valve and a vacuum pump, the vacuum argon pipeline 3 is provided with the vacuum pipeline ball valve and the vacuum pump, and the vacuum pipeline ball valve and the vacuum pump are electrically connected with the control cabinet, so that the vacuum argon system can be automatically opened and closed, the automation degree of the whole device is improved, and the labor consumption is reduced.

[0028] Preferably, the heat transfer system is a purple copper plate coated with stainless steel and is divided into an upper heat transfer device 7 and a lower heat transfer device 8, the upper heat transfer device 7 is arranged above the charging rack and adopts a plurality of purple copper plates stacked and coated with stainless steel, and the lower heat transfer device 8 is arranged below the charging rack and adopts a single purple copper plate coated with stainless steel, the purple copper plate 8 has good heat transfer function, and the coating of the thin stainless steel plate on the outside can prevent the reaction between lithium vapor and the purple copper plate 8.

[0029] Preferably, the industrial resistance furnace 1 is made of stainless steel, and the tank body 6, the sealing cover 2 and the vacuum argon system are detachably connected, so that the parts can be replaced conveniently.

[0030] Preferably, the industrial resistance furnace 1 is provided with a thermocouple 9 inserted therein, so as to measure the temperature of the industrial resistance furnace 1 and ensure the gradient temperature rise of the industrial resistance furnace 1.

[0031] The specific operation method of the utility model is as follows:

[0032] First, the need to keep the ambient air dry (dew point ≤-50℃), lithium boron alloy particles into the loading tray 11, the material height can not exceed the height of the loading tray 11, then put the loading tray 11 into the loading rack 10, the loading rack 10 is loaded into the tank body 6, the upper and lower ends of the loading rack 10 is pre-placed with a copper plate coated with stainless steel, heat conduction so that the lithium boron alloy particles are heated evenly, evenly distributed vacuum insulation block can ensure that the tank body 6 upper sealing ring temperature is kept within a safe range, to prevent high temperature damage to the rubber vacuum ring 4, second, cover the sealing cover 2, lock the screw, use the lifting equipment to put the tank body 6 into the furnace body of the industrial resistance furnace 1, connect the tank body 6 with the vacuum argon system, start the vacuum pump, open the vacuum pipeline ball valve, the gas in the tank body 6 is extracted, the vacuum degree reaches below 10Pa, then fill in argon, repeat the operation three times, three times, then start the heating device program, control the heating device gradient heating, while in the heating process, the argon gas is added, vacuum, argon gas operation and other operations, multiple vacuum argon environment conversion, can remove the oil gas and impurities in the lithium boron alloy through the vacuum argon pipeline 3. When the temperature rises to about 700 DEG C, the heating system reduces the heating power to make the furnace in the argon environment for a certain period of time. Finally, the tank body 6 is separated from the vacuum argon system, the lifting equipment is used to take out the tank body 6 from the furnace body of the industrial resistance furnace 1, and after natural cooling to room temperature, the tank body 6 is transferred to a dry room with a dew point below-45℃, the loading rack 10 is taken out, and the lithium boron alloy particles after heat treatment are poured into a clean and dry stainless steel tray to complete the preparation of lithium boron alloy; After heat treatment, the furnace body can also be directly cooled, which can save the lifting step, reduce the equipment cost and reduce the power consumption.

[0033] The lithium boron alloy heat treatment device can manufacture stable vacuum high-temperature environment, the loading tray 11 and the loading rack 10 can ensure that the lithium boron alloy particles are heated evenly and the oil gas has a volatile space, the control cabinet program controls the conversion mechanism and the gradient heating mechanism of the vacuum state and the argon state, the oil gas of the lithium boron alloy particles is removed, the unreacted B particles and free lithium in the lithium boron alloy particles are fully reacted, and the thermal stability performance of the lithium boron alloy is greatly improved.

[0034] The embodiments in the specification are described in a progressive manner, and each embodiment focuses on the difference from other embodiments. The same or similar parts of each embodiment can be referred to each other. For the device disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple, and the related parts can be referred to the method part.

[0035] The above description of disclosed embodiments enables one of ordinary skill in the art to make or use the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A lithium-boron alloy heat treatment apparatus, characterized by comprising: The application relates to an industrial resistance furnace (1), a tank body (6) and a control cabinet, the tank body (6) is arranged in the industrial resistance furnace (1), the top of the tank body (6) is provided with a sealing cover (2), the inside of the tank body (6) is provided with a heat insulation system and a heat transfer system, the periphery of the tank body (6) is circumferentially provided with heating devices, the upper side of the sealing cover (2) is provided with a vacuum argon system, and the heating devices and the vacuum argon system are electrically connected with the control cabinet.

2. The lithium-boron alloy heat treatment apparatus according to claim 1, wherein The tank body (6) is further provided with a charging tray (11) and a charging rack (10), a plurality of charging trays (11) are arranged on the charging rack (10), and the upper and lower ends of the charging rack (10) are provided with heat transfer systems.

3. The lithium-boron alloy heat treatment apparatus of claim 2, wherein, The charging tray (11) and the charging rack (10) are made of stainless steel, the charging tray (11) is welded by stainless steel meshes, and the charging rack (10) is welded by stainless steel rods.

4. The lithium-boron alloy heat treatment apparatus of claim 2, wherein, The heat insulation system comprises vacuum rings (4) and vacuum blocks (5), the vacuum rings (4) are arranged at the connecting positions of the tank body (6) and the sealing cover (2), and a plurality of vacuum blocks (5) are arranged below the sealing cover (2) and above the charging rack (10) and the heat transfer systems.

5. The lithium-boron alloy heat treatment apparatus of claim 1, wherein, The vacuum argon system comprises a vacuum argon pipeline (3), a vacuum pipeline ball valve and a vacuum pump, the vacuum argon pipeline (3) is provided with the vacuum pipeline ball valve and the vacuum pump, and the vacuum pipeline ball valve and the vacuum pump are electrically connected with the control cabinet.

6. The lithium-boron alloy heat treatment apparatus of claim 1, wherein, The heat transfer system is a purple copper plate coated with stainless steel and is divided into an upper heat transfer device (7) and a lower heat transfer device (8), the upper heat transfer device (7) is arranged above the charging rack and is made of stacked purple copper plates coated with stainless steel, and the lower heat transfer device (8) is arranged below the charging rack and is made of a single purple copper plate coated with stainless steel.

7. The lithium-boron alloy heat treatment apparatus of claim 1, wherein, The industrial resistance furnace (1) is made of stainless steel, and the tank body (6), the sealing cover (2) and the vacuum argon system are detachably connected.

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