A furnace end structure of a graphitization furnace
By adopting an integral refractory castable block structure and a tensioning mechanism at the furnace end of the graphitization furnace, the problems of displacement and cracking of the furnace head and tail of the Atchison graphitization furnace were solved, resulting in lower power consumption and better ventilation, and improving the performance and lifespan of the graphite electrodes.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- GUIYANG ALUMINUM MAGNESIUM DESIGN & RESEARCH INSTITUTE CO LTD
- Filing Date
- 2024-02-23
- Publication Date
- 2026-05-26
AI Technical Summary
The furnace head and tail walls of traditional Atchison graphitization furnaces are prone to displacement, deformation and cracking, resulting in poor contact of the conductive walls, high heat generation and high power consumption, which affects the performance and life of graphite electrodes and may also lead to material leakage and cross-contamination.
The structure adopts an integral refractory cast-in-place block structure, combined with a tensioning mechanism and aluminosilicate refractory fiber, to form symmetrical cast-in-place block components, which enhances structural stability and contact tightness, reduces deformation and cracks, and improves ventilation through heat dissipation holes and mortise and tenon structure.
It effectively prevents displacement and deformation of the furnace end wall, reduces heat generation and power consumption, ensures the life and performance of graphite electrodes, reduces the risk of material leakage, enhances ventilation, and ensures good contact of the conductive wall.
Smart Images
Figure CN118026161B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to a furnace end structure of a graphitization furnace, belonging to the technical field of graphitization furnace structure. Background Technology
[0002] Currently, the graphitization process for specialty carbon products, small-sized graphite electrodes, electrode connectors, and lithium battery anode materials is generally achieved using an Atchison graphitization furnace. The furnace ends (furnace head and furnace tail) of an Atchison graphitization furnace consist of graphitic carbon "conductive walls" and refractory material walls. The product is placed inside the furnace core, and current flows through the "conductive walls" at the furnace head and tail, the furnace core, and the surrounding positive and negative electrode busbars to form a circuit. The product reaches high temperatures and is graphitized during the energization process in the furnace. Traditional furnace head (tail) walls are constructed from several small refractory bricks. During production, factors such as the lateral pressure of the packing and high-temperature expansion can cause displacement, deformation, and cracks, leading to material leakage and cross-contamination. Simultaneously, the "conductive wall" is composed of several graphite blocks and high-power graphite electrodes (ultra-high-power graphite electrodes). Displacement and cracks in the furnace head (tail) walls can affect the performance of the tie rod springs, resulting in poor contact at the joints of the "conductive wall," leading to excessive contact resistance and heat generation. This not only causes excessive heat loss and high power consumption per ton of product but also causes the graphite electrodes to overheat and oxidize, affecting their performance and lifespan, and ultimately disrupting normal production. Summary of the Invention
[0003] To solve the above-mentioned technical problems, the present invention provides a furnace end structure for a graphitization furnace. This furnace end structure can effectively prevent displacement, deformation and cracking of the furnace end wall, reduce the high heat generation and high power consumption caused by poor contact between graphite products in the "conductive wall", ensure the life and performance of graphite electrodes, reduce the occurrence of material leakage and cross-contamination caused by deformation and cracks in the furnace head and tail walls, and enhance the ventilation effect at the bottom of the furnace head and tail.
[0004] The present invention is achieved through the following technical solutions.
[0005] The present invention provides a furnace end structure for a graphitization furnace, including a furnace body foundation; a casting block component is installed at the end of the furnace body foundation via a settling platform, the casting block component is composed of a left casting block and a right casting block symmetrically spliced together and fixed by a tensioning mechanism, the splice of the left casting block and the right casting block has refractory fiber; the bottom of the left casting block and the right casting block has multiple heat dissipation through holes along the axial direction of the furnace body foundation.
[0006] A conductive wall is installed on the cast-in-place block component along the central axis of the furnace foundation.
[0007] The bottom of the left and right casting blocks has a bottom through hole perpendicular to the axial direction of the furnace foundation, and the bottom through hole is lower than the heat dissipation through hole.
[0008] The heat dissipation holes are evenly distributed along the direction perpendicular to the extension of the bottom through hole.
[0009] The top surfaces of the left and right casting blocks have through holes perpendicular to the axial direction of the furnace foundation.
[0010] The left and right casting blocks have mortise and tenon structures on their sides for connecting with the furnace side walls on both sides of the furnace foundation.
[0011] The tensioning mechanism is installed through the cast-in-place block component in a left-right direction perpendicular to the axial direction of the furnace body foundation.
[0012] The left and right casting blocks are symmetrical.
[0013] The top through hole is an open concave hole.
[0014] The refractory fiber is aluminum silicate refractory fiber.
[0015] The beneficial effects of this invention are: convenient construction and installation, low implementation cost, effective prevention of displacement, deformation and cracking of the furnace end wall, reduction of high heat generation and high power consumption caused by poor contact between graphite products in the "conductive wall", ensuring the life and performance of graphite electrodes, reducing the occurrence of material leakage and cross-contamination caused by deformation and cracks in the furnace head and tail walls, enhancing the ventilation effect at the bottom of the furnace head and tail, ensuring tight contact between the "conductive wall" and other masonry, good wall integrity, and no maintenance costs. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of one embodiment of the present invention;
[0017] Figure 2 yes Figure 1 Top view;
[0018] Figure 3 yes Figure 1 Structural schematic diagram of the cast-in-place block component;
[0019] Figure 4 yes Figure 3 Side view;
[0020] Figure 5 yes Figure 3 Top view.
[0021] In the figure: 11-furnace body foundation, 12-furnace body side wall, 13-tensioning mechanism, 14-conductive wall, 2-cast block component, 21-left cast block, 22-right cast block, 23-refractory fiber, 24-heat dissipation through hole, 25-top through hole, 26-bottom through hole, 27-mortise and tenon structure. Detailed Implementation
[0022] The technical solution of the present invention is further described below, but the scope of protection is not limited to what is described.
[0023] The first embodiment of the present invention relates to, for example Figures 1 to 5 The furnace end structure of a graphitization furnace shown includes a furnace body foundation 11; a casting block component 2 is installed at the end of the furnace body foundation 11 via a settling platform. The casting block component 2 is composed of a left casting block 21 and a right casting block 22 symmetrically spliced together and fixed by a tensioning mechanism 13. Refractory fibers 23 are present at the splice of the left casting block 21 and the right casting block 22; multiple heat dissipation holes 24 are opened at the bottom of the left casting block 21 and the right casting block 22 along the axial direction of the furnace body foundation 11.
[0024] Therefore, this embodiment replaces the original method of piecing together refractory bricks with a monolithic cast refractory block structure, and the furnace head and tail are divided into two symmetrical structures, which are assembled together by a tensioning mechanism 13 consisting of tie rods and spring assemblies.
[0025] The second embodiment of the present invention is largely the same as the first embodiment, except that a conductive wall 14 is installed on the cast block component 2 along the central axis of the furnace body foundation 11.
[0026] Furthermore, the bottom of the left casting block 21 and the right casting block 22 are provided with bottom through holes 26 perpendicular to the axial direction of the furnace body foundation 11, and the bottom through holes 26 are lower than the heat dissipation through holes 24.
[0027] Furthermore, the heat dissipation through holes 24 are evenly distributed along the extension direction perpendicular to the bottom through hole 26. The bottom through hole 26 is mainly used for the pull rod of the tensioning mechanism 13 to pass through.
[0028] Furthermore, the tensioning mechanism 13 is installed through the cast block component 2 in a left-right direction perpendicular to the axis of the furnace body foundation 11.
[0029] The third embodiment of the present invention is largely the same as the first embodiment, except that the top surfaces of the left casting block 21 and the right casting block 22 are provided with top through holes 25 perpendicular to the axial direction of the furnace body foundation 11.
[0030] Furthermore, the left casting block 21 and the right casting block 22 have mortise and tenon structures 27 on their sides for connecting with the furnace body side walls 12 on both sides of the furnace body foundation 11.
[0031] Furthermore, the left casting block 21 and the right casting block 22 are symmetrical.
[0032] Furthermore, the top through hole 25 is an open concave hole.
[0033] Furthermore, refractory fiber 23 is aluminosilicate refractory fiber. Generally, during assembly, an expansion joint of several widths is provided between the two symmetrical structures, and the expansion joint is filled with aluminosilicate refractory fiber.
[0034] The main installation method of the present invention is as follows: before the furnace is built, two pre-made symmetrical integral cast blocks, the furnace head and furnace tail, are hoisted into the pit foundation respectively. A certain thickness of aluminum silicate fiber blanket is filled between the two cast blocks. Then, they are pre-fixed by the furnace end column and the tensioning device. After the furnace is built, the material is loaded and the furnace is dried, a certain pre-tightening force is applied before the furnace is started.
Claims
1. A furnace end structure for a graphitization furnace, comprising a furnace body foundation (11), characterized in that: The furnace body foundation (11) has a casting block component (2) installed at the end of the base via a platform. The casting block component (2) is composed of a left casting block (21) and a right casting block (22) symmetrically spliced together and fixed by a tensioning mechanism (13). There are refractory fibers (23) at the splice of the left casting block (21) and the right casting block (22). The bottom of the left casting block (21) and the right casting block (22) has multiple heat dissipation holes (24) along the axial direction of the furnace body foundation (11). The cast block component (2) has a conductive wall (14) installed along the central axis of the furnace body foundation (11). The bottom of the left casting block (21) and the right casting block (22) are provided with bottom through holes (26) perpendicular to the furnace body foundation (11) axially, and the bottom through holes (26) are lower than the heat dissipation through holes (24). The heat dissipation holes (24) are evenly distributed along the extension direction perpendicular to the bottom through hole (26).
2. The furnace end structure of the graphitization furnace as described in claim 1, characterized in that: The top surfaces of the left casting block (21) and the right casting block (22) are provided with top through holes (25) perpendicular to the axial direction of the furnace foundation (11).
3. The furnace end structure of the graphitization furnace as described in claim 1, characterized in that: The left casting block (21) and the right casting block (22) have mortise and tenon structures (27) on their sides for connecting the furnace body side walls (12) on both sides of the furnace body foundation (11).
4. The furnace end structure of the graphitization furnace as described in claim 1, characterized in that: The tensioning mechanism (13) is installed through the cast block component (2) in a left-right direction perpendicular to the axis of the furnace body foundation (11).
5. The furnace end structure of the graphitization furnace as described in claim 1, characterized in that: The left casting block (21) and the right casting block (22) are symmetrical.
6. The furnace end structure of the graphitization furnace as described in claim 2, characterized in that: The top through hole (25) is an open concave hole.
7. The furnace end structure of the graphitization furnace as described in claim 1, characterized in that: The refractory fiber (23) is aluminum silicate refractory fiber.