A kind of suitable for ultra-high temperature sintering kiln furniture

Abstract

The utility model provides a kind of suitable for superhigh temperature sintering's sagger device, it is related to negative material preparation technical field, including the downwardly stacked several sagger bodies, the sagger body includes integrally-formed bottom wall and four side walls, left and right two The side wall is equipped with transverse gap one, front and rear two The side wall is equipped with longitudinal gap, The bottom wall is equipped with transverse gap two with transverse gap one alignment, The depth of transverse gap one is less than the depth of longitudinal gap, The transverse gap one and transverse gap two of upper and lower two sagger It is mutually buckled to form transverse airflow channel, The longitudinal gap of lower sagger is in abutment in the bottom wall of upper sagger and forms longitudinal airflow channel.The utility model can make hot airflow in sagger body from transverse airflow distribution, cold airflow is inhaled from longitudinal airflow channel, improve the convection heat exchange in sagger body, improve the heat exchange efficiency of lower sagger body, guarantee the heat dissipation consistency of multilayer sagger body.

Description

Technical Field

[0001] This utility model relates to the field of negative electrode material preparation technology, specifically a sagger device suitable for ultra-high temperature sintering. Background Technology

[0002] Lithium titanate, as a "zero-strain material," exhibits a volume strain of less than 1% during charge and discharge, thus demonstrating excellent cycle performance. Furthermore, its discharge voltage is relatively stable and does not decompose the electrolyte, thereby enhancing the overall safety performance of lithium batteries.

[0003] The preparation of lithium titanate anode materials requires the application of advanced engineering technologies such as dispersion grinding technology, spheroidization technology, heterogeneous mixing technology, and fully automated online monitoring solid-state sintering to process raw materials into lithium titanate anode materials with uniform size, shape, and product particles.

[0004] In the sintering process of lithium titanate anode material, the raw materials need to be placed in saggers for high-temperature sintering. In order to improve the space utilization of the sintering furnace and reduce sintering energy consumption, the stacked sagger process is adopted for sintering. However, in the stacked sagger process, the lower saggers have difficulty in heat dissipation, which causes the saggers in the same kiln to experience different thermal cycles, resulting in a temperature gradient between the saggers in the vertical direction. The anode material is extremely sensitive to temperature, resulting in large performance fluctuations in the same batch of products.

[0005] In existing technologies, a notch is usually set at the top of the side wall of the sagger. When using a double-layer sagger, the notch forms a channel for gas flow to improve the heat exchange efficiency of the lower sagger. However, the airflow channels of the sagger are at the same height, and the high-temperature airflow inside the sagger escapes outward from the four airflow channels, preventing the outside cold air from entering the sagger for effective heat exchange. Utility Model Content

[0006] (a) Technical problems to be solved

[0007] To address the shortcomings of existing technologies, this invention provides a sagger device suitable for ultra-high temperature sintering, solving the problems mentioned in the background section.

[0008] (II) Technical Solution

[0009] To achieve the above objectives, this utility model provides the following technical solution:

[0010] A sagger device suitable for ultra-high temperature sintering includes several sagger bodies stacked downwards. Each sagger body includes an integrally formed bottom wall and four side walls. The left and right side walls have a horizontal notch I, and the front and rear side walls have a vertical notch. The bottom wall has a horizontal notch II aligned with the horizontal notch I. The depth of the horizontal notch I is less than the depth of the vertical notch. The horizontal notches I and II of the upper and lower saggers interlock to form a horizontal airflow channel. The vertical notch of the lower sagger abuts against the bottom wall of the upper sagger to form a vertical airflow channel.

[0011] Preferably, the top wall of the second transverse notch is integrally formed with a wedge-shaped guide block, and the left and right sides of the wedge-shaped guide block are symmetrically provided with guide slopes. The outer side of the guide slope is flush with the top wall of the second transverse notch, and the guide slope gradually slopes downward from both sides to the middle. The middle part of the wedge-shaped guide block is flush with the lower side of the bottom wall.

[0012] Preferably, an arc-shaped transition portion is integrally formed between two adjacent sidewalls, the top of the arc-shaped transition portion is provided with a stacked bowl protrusion, and the outer side of the bottom wall is provided with a stacked bowl groove that matches the positioning protrusion. The stacked bowl protrusion is inserted into the stacked bowl groove in a convex-concave fit.

[0013] Preferably, the outer side of the arc-shaped transition portion is integrally formed with a thickened layer.

[0014] Preferably, the longitudinal notches of the front and rear sidewalls are staggered to the left and right.

[0015] (III) Beneficial Effects

[0016] This invention provides a sagger device suitable for ultra-high temperature sintering. It has the following beneficial effects:

[0017] 1. In this utility model, by controlling the depth of the transverse and longitudinal notches, the transverse and longitudinal airflow channels formed by the stacked sagger bodies are arranged in a staggered manner. The rising hot air will escape from the transverse airflow channel along the guide slope of the wedge-shaped guide block, so that the lower sagger has a slight negative pressure. Cold air can be drawn in from the lower longitudinal airflow channel to achieve convection in the sagger body, thereby enhancing the heat exchange efficiency of the lower sagger and making the heat dissipation efficiency between the stacked multi-layer sagger bodies more uniform, avoiding product performance differences in the saggers.

[0018] 2. In this utility model, the staggered arrangement of the longitudinal notches allows the cold airflow entering the sagger to be offset and swirled, which can fully exchange heat with the sagger body and further improve the heat exchange efficiency of the lower sagger. Attached Figure Description

[0019] Figure 1This is a schematic diagram of the structure of a sagger device suitable for ultra-high temperature sintering according to the present invention;

[0020] Figure 2 This is a schematic diagram of the structure of the sagger body in this utility model.

[0021] In the figure: 1. Sagger body; 11. Bottom wall; 12. Side wall; 2. Arc-shaped transition section; 3. Stacked sagger protrusion; 4. Horizontal notch one; 5. Longitudinal notch; 6. Horizontal notch two; 7. Wedge-shaped guide block. Detailed Implementation

[0022] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0023] This utility model embodiment provides a sagger device suitable for ultra-high temperature sintering, such as... Figure 1-2 As shown, the invention includes several sagger bodies 1 stacked downwards. Each sagger body 1 includes an integrally formed bottom wall 11 and four side walls 12. The bottom wall 11 of the upper sagger body 1 is stacked on top of the side walls 12 of the lower sagger body. An arc-shaped transition portion 2 is integrally formed between two adjacent side walls 12. A thickened layer is integrally formed on the outer side of the arc-shaped transition portion 2. The thickened arc-shaped transition portion 2 can enhance the strength of the arc-shaped transition portion 2 and prevent damage to the transition area of ​​the side wall 12 caused by thermal vibration. A stacking protrusion 3 is provided at the top of the arc-shaped transition portion 2. A stacking groove is provided on the outer side of the bottom wall 11 to match the positioning protrusion 3. The stacking protrusion 3 is inserted into the stacking groove in a concave-convex fit, which facilitates the limiting of the stacking of multiple sagger bodies 1 and prevents the sagger from tipping over during the transmission process.

[0024] The left and right side walls 12 have transverse notches 4, and the front and rear side walls 12 have longitudinal notches 5. The bottom wall 11 has a transverse notch 6 aligned with the transverse notch 4. The depth of the transverse notch 4 is less than the depth of the longitudinal notch 5. The transverse notches 4 and 6 of the upper and lower saggers interlock to form a transverse airflow channel. The longitudinal notch 5 of the lower sagger abuts against the bottom wall 11 of the upper sagger to form a longitudinal airflow channel. The height of the longitudinal airflow channel formed by the stacked sagger bodies 1 is lower than that of the transverse airflow channel, allowing for a greater amount of hot airflow. The rising airflow escapes through the higher lateral airflow channel, creating a slight negative pressure inside the sagger body 1. It also draws in cold airflow through the lower longitudinal airflow channel, allowing it to exchange heat with the sagger body 1. This improves the heat exchange efficiency of the lower sagger body 1, reduces the heat dissipation difference between multiple saggers, and ensures consistent product performance. The longitudinal notches 5 of the two side walls 12 are staggered, and the cold airflow entering from the two side walls 12 is offset and collides, causing the cold air to collide and form a spiral turbulence inside the sagger body 1, fully exchanging heat with the sagger body 1 and further improving the heat exchange efficiency.

[0025] The top wall of the second transverse notch 6 is integrally formed with a wedge-shaped guide block 7. The left and right sides of the wedge-shaped guide block 7 are symmetrically provided with guide slopes. The outer side of the guide slope is flush with the top wall of the second transverse notch 6. The guide slope gradually slopes downward from both sides to the middle. The middle part of the wedge-shaped guide block 7 is flush with the lower side of the bottom wall 11. The hot airflow in the lower sagger body 1 rises and preferentially contacts the bottom wall 11 of the upper sagger body 1. It is discharged from the transverse airflow channels on both sides along the diversion of the slope of the wedge-shaped guide block 7. In addition, the part of the bottom wall 11 located at the second transverse notch 6 forms an I-shaped plane with the middle part of the wedge-shaped guide block 7. It can be driven at any angle in the roller sintering equipment without getting stuck on the roller, ensuring the smooth operation of the sintering process.

[0026] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A sagger device suitable for ultra-high temperature sintering, comprising a plurality of downwardly stacked sagger bodies, characterized in that: The sagger body includes an integrally formed bottom wall and four side walls. The left and right side walls have a horizontal notch I, and the front and rear side walls have a vertical notch. The bottom wall has a horizontal notch II aligned with the horizontal notch I. The depth of the horizontal notch I is less than the depth of the vertical notch. The horizontal notches I and II of the upper and lower saggers interlock to form a horizontal airflow channel. The vertical notch of the lower sagger abuts against the bottom wall of the upper sagger to form a vertical airflow channel.

2. The sagger device suitable for ultra-high temperature sintering according to claim 1, characterized in that: The top wall of the second transverse gap is integrally formed with a wedge-shaped guide block. The left and right sides of the wedge-shaped guide block are symmetrically provided with guide slopes. The outer side of the guide slope is flush with the top wall of the second transverse gap. The guide slope gradually slopes downward from both sides to the middle. The middle part of the wedge-shaped guide block is flush with the lower side of the bottom wall.

3. A sagger device suitable for ultra-high temperature sintering according to claim 2, characterized in that: An arc-shaped transition section is integrally formed between two adjacent sidewalls. A stacked bowl protrusion is provided at the top of the arc-shaped transition section, and a stacked bowl groove is provided on the outer side of the bottom wall to match the positioning protrusion. The stacked bowl protrusion is inserted into the stacked bowl groove in a convex-concave fit.

4. A sagger device suitable for ultra-high temperature sintering according to claim 3, characterized in that: The outer side of the arc-shaped transition section is integrally formed with a thickened layer.

5. A sagger device suitable for ultra-high temperature sintering according to claim 4, characterized in that: The longitudinal notches of the two side walls are staggered to the left and right.

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