Refractory brick lining structure of a dense adiabatic furnace for lithium battery baking kiln

Abstract

The utility model discloses a refractory brick lining structure of lithium battery calcination kiln dense heat insulating furnace relates to heat insulating furnace technical field. The utility model discloses corundum brick is provided with mullite brick at corundum brick back side, and corundum brick back side is provided with anti -cracking mechanism, and the anti -cracking mechanism includes the transition brick of setting in corundum brick back side, and the phosphate mortar layer of sticking in transition brick front side. The utility model discloses through setting up anti -cracking mechanism, including transition brick, phosphate mortar layer, light high alumina brick, high temperature resistance mortar layer and ceramic fiber blanket, forms multilayer buffer and transition structure, and the interlayer stress caused by the difference of thermal expansion coefficient is reduced significantly, prevents the brick body cracking or falling off under high temperature, and the connecting mechanism adopts high temperature resistance stainless steel anchor, positioning block and positioning groove, sealing plate and other components, realizes the accurate positioning and firm connection of working layer and heat insulating layer, and improves the mechanical strength and stability under high temperature of overall structure.

Description

Technical Field

[0001] This utility model belongs to the field of heat insulation furnace technology, and in particular relates to the refractory brick lining structure of a dense heat insulation furnace for lithium battery roasting kiln. Background Technology

[0002] The lithium battery roasting kiln is a key thermal equipment in the production process of lithium battery positive and negative electrode materials, and its furnace chamber needs to maintain a stable high-temperature environment for a long time. To ensure the thermal efficiency and operational safety of the kiln, the furnace body usually adopts a composite refractory brick lining structure consisting of a working layer, an insulation layer, and a protective layer. Among them, the working layer is in direct contact with the high-temperature atmosphere and must withstand heat load, chemical erosion, and material scouring; the insulation layer mainly serves to block heat flow and reduce heat loss; the protective layer is used to fix the refractory lining and ensure the integrity of the structure.

[0003] Currently, cement mortar is commonly used as the masonry material for interlayer connections in existing refractory brick lining structures. While this process is simple to construct and has low cost, it has revealed significant problems in actual operation: the working layer is exposed to high temperatures for extended periods, causing the mortar between the working layer and the insulation layer to crack, pulverize, or even detach under high temperatures, thus shortening the service life of the refractory brick lining structure. To address these issues, we have developed a refractory brick lining structure for a dense insulated furnace in a lithium battery calcining kiln. Utility Model Content

[0004] The purpose of this invention is to provide a refractory brick lining structure for a dense insulated furnace of a lithium battery roasting kiln. Through the cooperation of an anti-cracking mechanism and a connecting mechanism, the problem of short service life of the existing refractory brick lining structure is solved.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution.

[0006] This utility model relates to a refractory brick lining structure for a dense insulated furnace in a lithium battery calcining kiln, comprising corundum bricks, with mullite bricks disposed on the rear side of the corundum bricks; an anti-cracking mechanism is provided on the rear side of the corundum bricks, the anti-cracking mechanism comprising a transition brick disposed on the rear side of the corundum bricks, and a phosphate mortar layer bonded to the front side of the transition bricks; a connecting mechanism is provided on the front side of the mullite bricks, the connecting mechanism comprising a groove formed on the front side of the transition bricks, and a high-temperature resistant stainless steel anchor installed inside the rear side of the groove.

[0007] The present invention is further configured such that the anti-cracking mechanism includes a lightweight high-alumina brick fixedly connected to the front side of the mullite brick, and a slot opened on the rear side of the transition brick.

[0008] The present invention is further configured such that the anti-cracking mechanism includes a high-temperature resistant mortar layer bonded to the surface of the mullite brick, and a ceramic fiber blanket bonded to the surface of the high-temperature resistant mortar layer.

[0009] The present invention is further configured such that the connecting mechanism includes a sealing plate disposed inside the groove, a positioning block fixedly connected to the rear side of the corundum brick, and a positioning groove opened on the front side of the transition brick.

[0010] The present invention is further configured such that the connecting mechanism includes a limiting member sleeved on the surface of the high-temperature resistant stainless steel anchor and a nut threadedly connected to the surface of the high-temperature resistant stainless steel anchor.

[0011] The present invention is further configured such that the connecting mechanism includes an anchoring hole opened inside the rear side of the groove, and ceramic putty bonded to the surface of the high-temperature resistant stainless steel anchor.

[0012] The present invention has the following beneficial effects.

[0013] 1. This utility model, by setting up an anti-cracking mechanism, includes a transition brick, a phosphate mortar layer, a lightweight high-alumina brick, a high-temperature resistant mortar layer, and a ceramic fiber blanket, forming a multi-layer buffer and transition structure. This significantly reduces the interlayer stress caused by the difference in thermal expansion coefficients, preventing the bricks from cracking or falling off at high temperatures. The connection mechanism uses high-temperature resistant stainless steel anchors, positioning blocks and positioning grooves, sealing plates, and other components to achieve precise positioning and firm connection between the working layer and the insulation layer, thereby improving the mechanical strength and stability of the overall structure at high temperatures.

[0014] 2. This utility model uses mullite bricks and lightweight high-alumina bricks to form a high-efficiency heat insulation layer, combined with the flexible heat insulation properties of ceramic fiber blankets, to effectively reduce heat loss, improve energy utilization efficiency, and adapt to the high-temperature environment of lithium battery material calcination. Through the application of gradient thermal stress release structure and high-temperature bonding materials, the durability of refractory brick lining in high-temperature and corrosive environments is significantly improved, extending the service life of the kiln. The structure is reasonably designed, and the components are combined with slots, mortar layers and mechanical anchoring, making installation simple and reducing operating costs.

[0015] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0017] Figure 1 A three-dimensional view of the refractory brick lining structure of a dense insulated furnace for lithium battery calcination.

[0018] Figure 2 This is a cross-sectional view of the transition bricks in the refractory brick lining structure of a dense insulated furnace for lithium battery calcination.

[0019] Figure 3 This is a diagram showing the disassembly state of the transition bricks in the refractory brick lining structure of a dense insulated furnace for lithium battery calcination.

[0020] Figure 4 This is a cross-sectional view of the ceramic fiber blanket in the refractory brick lining structure of a dense insulated furnace for lithium battery calcination.

[0021] Figure 5 Refractory brick lining structure for dense insulated furnace of lithium battery calcining kiln Figure 3 A magnified view of A in the middle.

[0022] In the attached diagram: 1. Corundum brick; 2. Mullite brick; 3. Anti-cracking mechanism; 31. Transition brick; 32. Phosphate mortar layer; 33. Lightweight high-alumina brick; 34. Slot; 35. High-temperature resistant mortar layer; 36. Ceramic fiber blanket; 4. Connecting mechanism; 41. Groove; 42. High-temperature resistant stainless steel anchor; 43. Sealing plate; 44. Positioning block; 45. Positioning groove; 46. Limiting element; 47. Nut; 48. Anchoring hole; 49. Ceramic mortar. Detailed Implementation

[0023] The technical solutions of the present utility model will be described below with reference to the accompanying drawings. The described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0024] Example 1

[0025] Please see Figures 1-5This utility model relates to a refractory brick lining structure for a dense insulated furnace in a lithium battery calcination kiln. It includes corundum bricks 1, which serve as the working layer. As the working layer, corundum bricks 1 directly contact the high-temperature atmosphere and possess extremely high refractoriness, wear resistance, and chemical corrosion resistance, making them suitable for the high-temperature and corrosive environment during the calcination of lithium battery materials. Mullite bricks 2 are arranged behind the corundum bricks 1, serving as the main material of the insulation layer. Mullite bricks 2 exhibit good high-temperature stability, low thermal conductivity, and thermal shock resistance, effectively reducing heat transfer to the outside of the furnace and improving energy utilization efficiency. An anti-cracking mechanism 3 is provided behind the corundum bricks 1. The anti-cracking mechanism 3 includes a transition brick 31 located behind the corundum bricks 1. The transition brick 31 is situated between the working layer and the insulation layer, serving as a buffer and transition layer. To reduce stress concentration caused by differences in thermal expansion coefficients, a phosphate mortar layer 32 is bonded to the front side of the transition brick 31. The phosphate mortar layer 32 is bonded to the corundum brick 1. The phosphate mortar layer 32 is a high-temperature adhesive with good high-temperature bonding strength and corrosion resistance. It is used to bond the corundum brick 1 and the transition brick 31 to prevent interlayer delamination. A connecting mechanism 4 is provided on the front side of the mullite brick 2. The connecting mechanism 4 includes a groove 41 opened on the front side of the transition brick 31. The groove 41 accommodates anchors and sealing plates 43, providing mechanical connection space. A high-temperature resistant stainless steel anchor 42 is installed inside the rear side of the groove 41. The high-temperature resistant stainless steel anchor 42 is a core mechanical connector with excellent high-temperature strength and oxidation resistance. It is used to anchor the transition brick 31 and the insulation layer.

[0026] Example 2

[0027] Please see Figures 1-5Based on Embodiment 1, the anti-cracking mechanism 3 further includes a lightweight high-alumina brick 33 fixedly connected to the front side of the mullite brick 2. The lightweight high-alumina brick 33 and the mullite brick 2 serve as a heat insulation layer. The lightweight high-alumina brick 33 further enhances the heat insulation performance and reduces the overall structural weight. A slot 34 is opened on the rear side of the transition brick 31. The size of the slot 34 is adapted to the lightweight high-alumina brick 33. The slot 34 is used to position and fix the lightweight high-alumina brick 33, enhancing the structural integrity and stability. The anti-cracking mechanism 3 also includes a component bonded to the mullite brick 2. The surface of the high-temperature resistant mortar layer 35 is bonded to a ceramic fiber blanket 36. The ceramic fiber blanket 36 is in close contact with the transition brick 31. The high-temperature resistant mortar layer 35 is used to bond the mullite brick 2 and the ceramic fiber blanket 36. The ceramic fiber blanket 36 is a flexible thermal insulation material with good compression resilience and thermal insulation performance. It can absorb thermal stress and prevent the brick from cracking. The connecting mechanism 4 also includes a sealing plate 43 disposed inside the groove 41. The size of the groove 41 is adapted to the sealing plate 43. 3. A closed groove 41 protects the anchor and is fixedly connected to the positioning block 44 on the rear side of the corundum brick 1. A positioning groove 45 is opened on the front side of the transition brick 31. The size of the positioning groove 45 is adapted to the positioning block 44. The positioning block 44 and the positioning groove 45 accurately position the corundum brick 1 and the transition brick 31, ensuring masonry accuracy and structural alignment. The connecting mechanism 4 also includes a limiting member 46 sleeved on the surface of the high-temperature resistant stainless steel anchor 42 and a nut 47 threadedly connected to the surface of the high-temperature resistant stainless steel anchor 42. The limiting member 46 and the transition member The nuts 47 and 46 are in contact with each other, and the nut 47 and 46 are in contact with each other. The nut 47 and 46 fix the anchor and prevent it from loosening at high temperature. The connecting mechanism 4 also includes an anchor hole 48 opened inside the rear side of the groove 41. An anchor hole 48 is also opened on the front side of the lightweight high-alumina brick 33. Ceramic putty 49 is bonded to the surface of the high-temperature resistant stainless steel anchor 42. The anchor hole 48 is reserved for the anchor to pass through, ensuring a firm connection. The ceramic putty 49 fills the gap around the anchor and enhances the high-temperature stability of the brick.

[0028] The working principle of this utility model is as follows: During installation, a high-temperature resistant mortar layer 35 is first applied to the surface of the mullite brick 2, and a ceramic fiber blanket 36 is then bonded to its surface to form a flexible heat-insulating buffer layer. Subsequently, a lightweight high-alumina brick 33 is inserted into the slot 34 on the rear side of the transition brick 31 for initial positioning. Next, a high-temperature resistant stainless steel anchor 42 is passed through the anchoring hole 48, and the gaps are filled with ceramic mortar 49 to firmly connect the transition brick 31 to the heat-insulating layer. During the installation of the working layer, the positioning block 44 on the rear side of the corundum brick 1 is inserted into the positioning groove 45 on the front side of the transition brick 31 to ensure precise alignment between the working layer and the transition layer. The sealing plate 43 in the groove 41 provides sealing protection for the anchoring structure. Finally, a phosphate mortar layer 32 is used to bond the corundum brick 1 and the transition brick 31 together to form a complete refractory brick lining structure.

[0029] During kiln operation, the working layer directly withstands high temperatures and chemical erosion. Heat is transferred step by step through the transition layer and insulation layer. The ceramic fiber blanket 36 and the mortar layer effectively absorb and release thermal stress, preventing structural cracking. The anchoring mechanism and positioning system ensure that each layer maintains a stable connection during thermal expansion and contraction, thereby improving the overall high-temperature performance and service life of the refractory brick lining.

[0030] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A refractory brick lining structure for a dense, adiabatic furnace of a lithium battery calcining kiln, comprising corundum bricks (1), characterized in that: A mullite brick (2) is provided on the rear side of the corundum brick (1); The corundum brick (1) is provided with a crack prevention mechanism (3) on the rear side. The crack prevention mechanism (3) includes a transition brick (31) provided on the rear side of the corundum brick (1) and a phosphate mortar layer (32) bonded to the front side of the transition brick (31). The mullite brick (2) is provided with a connecting mechanism (4) on the front side. The connecting mechanism (4) includes a groove (41) opened on the front side of the transition brick (31) and a high-temperature resistant stainless steel anchor (42) installed inside the rear side of the groove (41).

2. The refractory brick lining structure of the dense insulated furnace for lithium battery roasting kiln according to claim 1, characterized in that: The anti-cracking mechanism (3) also includes a lightweight high-alumina brick (33) fixedly connected to the front side of the mullite brick (2) and a slot (34) opened on the rear side of the transition brick (31).

3. The refractory brick lining structure of the dense insulated furnace for lithium battery roasting kiln according to claim 1, characterized in that: The anti-cracking mechanism (3) also includes a high-temperature resistant mortar layer (35) bonded to the surface of the mullite brick (2) and a ceramic fiber blanket (36) bonded to the surface of the high-temperature resistant mortar layer (35).

4. The refractory brick lining structure of the dense insulated furnace for lithium battery roasting kiln according to claim 1, characterized in that: The connecting mechanism (4) also includes a sealing plate (43) disposed inside the groove (41), a positioning block (44) fixedly connected to the rear side of the corundum brick (1), and a positioning groove (45) opened on the front side of the transition brick (31).

5. The refractory brick lining structure of the dense insulated furnace for lithium battery roasting kiln according to claim 1, characterized in that: The connecting mechanism (4) also includes a limiting member (46) sleeved on the surface of the high-temperature resistant stainless steel anchor (42) and a nut (47) threadedly connected to the surface of the high-temperature resistant stainless steel anchor (42).

6. The refractory brick lining structure of the dense insulated furnace for lithium battery roasting kiln according to claim 1, characterized in that: The connecting mechanism (4) also includes an anchoring hole (48) opened inside the rear side of the groove (41) and ceramic putty (49) bonded to the surface of the high temperature resistant stainless steel anchor (42).

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