Improved structure of inner cylinder of rotary kiln for sintering lithium / sodium battery positive electrode material at temperature of more than 800 DEG C by gas flame-proof sintering
By adopting a high-temperature-resistant hole-punched metal cylinder and inner hook structure, combined with the flame-disconnected sintering of natural gas spray gun, the thermal expansion and pollution problems of the rotary kiln at above 800℃ are solved, and the high-temperature stable operation and product quality are achieved.
Patent Information
- Application Number
- CN202323473173.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-20
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2033-12-20
AI Technical Summary
When the existing rotary kiln is working above 800℃, the metal cylinder is contaminated by thermal expansion deformation, high temperature oxidation and shedding of the inner surface of the cylinder, and harmful substances in the exhaust gas after the flame of natural gas are burned, resulting in gas separation above 800℃. The inner cylinder structure of the rotary kiln with flame-sintered lithium battery/sodium electrode positive electrode material is difficult to achieve.
Use hole-punched metal cylinder, inner hook and fastener, connected by fastener, corrosion-resistant and wear-resistant lining block is installed on the inner hook, the material is resistant to high temperatures of more than 800℃, and is sintered by a natural gas spray gun to avoid harmful effects in the exhaust gas. Materials and high temperature oxidation and shedding.
It has achieved stable high-temperature operation above 800℃, avoided cylinder and exhaust pollution, improved product quality, solved the risk of high-temperature thermal expansion, and achieved quality improvement brought by spiral transmission.
Smart Images
Figure CN222187742U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to an inner cylinder structure of a rotary kiln, in particular to an inner cylinder structure of a rotary kiln for sintering lithium battery / sodium battery positive electrode materials at a temperature above 800°C by using gas flame separation. Background Art
[0002] The operating temperature of the rotary kiln used for sintering lithium battery / sodium battery positive electrode materials in the domestic market does not exceed 700℃. The reason is that the rotary kiln cylinder is made of metal material. When the metal material temperature exceeds 700℃, it will cause thermal expansion and deformation. The inner surface of the cylinder will oxidize and fall off at high temperature, which will pollute the positive electrode material. The magnetic metal content of the power battery must be less than 30 PPB and must be above 800℃ to resist strong alkaline corrosion with a pH value of 12.5-13.5. In addition, there is a key difficulty in replacing electricity with natural gas. It cannot use open flames and must be sintered with flame-muffled sintering. The reason is that the harmful substances in the exhaust gas after the open flame combustion of natural gas will pollute the positive electrode material. Therefore, the industry has not yet broken through the technical difficulties, that is, there is no rotary kiln for gas-fired flame-muffled sintering of battery positive electrode materials above 800℃. Utility Model Content
[0003] Purpose of the invention: The purpose of the utility model is to overcome the deficiencies in the prior art and to provide an improved structure of the inner cylinder of a rotary kiln for gas-fired flame-muffle sintering of lithium / sodium positive electrode materials at temperatures above 800°C with spiral transmission to effectively improve product quality.
[0004] Technical solution: In order to solve the above technical problems, the utility model discloses an improved structure of the inner cylinder of a rotary kiln for sintering lithium / sodium positive electrode materials at above 800°C by gas-fired flame-muffle, which comprises a perforated metal cylinder, on the inner wall of which are provided a plurality of rows of perforated metal inner hooks, which are fastened and connected by fasteners, and on the same row of perforated metal inner hooks, corrosion-resistant and wear-resistant lining blocks I and corrosion-resistant and wear-resistant lining blocks II are adjacently provided, the corrosion-resistant and wear-resistant lining block I comprises a wear-resistant lining block body I, on one side of the wear-resistant lining block body I is provided a concave-convex snap button I, and on the other side is provided a boss, the corrosion-resistant and wear-resistant lining block II comprises a wear-resistant lining block body II, on one side of the wear-resistant lining block body II is provided a concave-convex snap button II, and on the other side is provided a 45° material guide boss, the concave-convex snap button I and the concave-convex snap button II are matched with the perforated metal inner hooks, and the bosses on the same row of perforated metal inner hooks and the 45° material guide bosses form spiral bosses.
[0005] Furthermore, the perforated metal inner hook includes a metal inner hook I and a metal inner hook II, which are connected via a perforated connecting edge, the metal inner hook I and the metal inner hook II are both V-shaped, and the perforated connecting edge is a long strip.
[0006] Furthermore, the perforated metal cylinder, the perforated metal inner hook and the fastener are all made of the same material, and their high temperature resistance exceeds 800°C.
[0007] A protrusion I is provided at one end of the wear-resistant lining block body I, and a groove I is provided at the other end.
[0008] A protrusion II is provided at one end of the wear-resistant lining block body II, and a groove II is provided at the other end.
[0009] The fasteners are screws or bolts.
[0010] Beneficial effects: Compared with the prior art, the utility model has the following significant advantages:
[0011] ①The perforated metal cylinder and the corrosion-resistant and wear-resistant lining are connected through the perforated metal inner hook, which is convenient to connect, light in weight and has a small rotation load;
[0012] ② The natural gas spray gun is used for flame sintering, and the perforated metal cylinder, perforated metal inner hook, and fasteners are all made of the same material. Their high temperature resistance exceeds 800°C. There are basically no harmful substances in the exhaust gas after natural gas combustion and high-temperature oxidation and shedding on the inner surface of the cylinder to pollute the positive electrode material, and the product quality is high;
[0013] ③ The corrosion-resistant wear-resistant lining block I includes a wear-resistant lining block body I, on one side of which a concave-convex snap buckle I is provided, and on the other side a boss is provided; the corrosion-resistant wear-resistant lining block II includes a wear-resistant lining block body II, on one side of which a concave-convex snap buckle II is provided, and on the other side a 45° material guide boss is provided; the boss on the same row of perforated metal inner hooks and the 45° material guide boss form a spiral boss with spiral transmission, which effectively improves product quality;
[0014] ④ The perforated metal cylinder and the perforated metal inner hook are screwed on the cylinder with wear-resistant lining blocks, which effectively solves the risk of high temperature thermal expansion caused by electric welding of the metal cylinder and the metal hook. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 This is a schematic diagram of the structure of the utility model Figure 1 ;
[0016] Figure 2 This is a schematic diagram of the structure of the utility model Figure 2 ;
[0017] Figure 3 yes Figure 2 A three-dimensional view of the corrosion-resistant and wear-resistant lining block I;
[0018] Figure 4 yes Figure 2 Front view of the middle corrosion-resistant and wear-resistant lining block Ⅰ;
[0019] Figure 5 yes Figure 2 A three-dimensional picture of the corrosion-resistant and wear-resistant lining block II;
[0020] Figure 6 yes Figure 2 Front view of the middle corrosion and wear resistant lining block II;
[0021] Figure 7 yes Figure 1 Schematic diagram of the connection structure between the middle corrosion-resistant wear-resistant lining block I and the punched metal inner hook;
[0022] Figure 8 It is a three-dimensional diagram of the punched metal inner hook in the utility model;
[0023] Fig. 9 It is a cross-sectional view of the main surface of the punched metal inner hook in the utility model;
[0024] Fig.10 It is a side sectional view of the punched metal inner hook in the utility model;
[0025] Fig.11 It is a three-dimensional diagram of the perforated metal cylinder in the utility model. DETAILED DESCRIPTION
[0026] The utility model is further described below in conjunction with the accompanying drawings and embodiments. Example 1
[0027] like Figure 1 , Figure 7 , Figure 8 , Fig. 9 , Fig.10 and Fig.11As shown, the utility model discloses an improved structure of the inner cylinder of a rotary kiln for sintering lithium / sodium positive electrode materials at a temperature above 800°C by gas-fired flame-muffle, which comprises a perforated metal cylinder 1, wherein a plurality of rows of perforated metal inner hooks 2 are arranged on the inner wall of the perforated metal cylinder 1, and the perforated metal cylinder 1, the perforated metal inner hooks 2 and the fasteners are all made of the same material, and their high temperature resistance exceeds 800°C, and the perforated metal inner hooks 2 comprise metal inner hooks Ⅰ2.1 and metal inner hooks Ⅱ2.2, which are connected by a perforated connecting edge 2.3, wherein the metal inner hooks Ⅰ2.1 and the metal inner hooks Ⅱ2.2 are both V-shaped, and the perforated connecting edge 2.3 is a long strip. On the same row of perforated metal inner hooks 2, an anti-corrosion and wear-resistant lining block I3 and an anti-corrosion and wear-resistant lining block II4 are adjacently arranged, the anti-corrosion and wear-resistant lining block I3 includes a wear-resistant lining block body I3.1, one side of the wear-resistant lining block body I3.1 is provided with a concave-convex snap button I3.2, and the other side is provided with a boss 3.3, the anti-corrosion and wear-resistant lining block II4 includes a wear-resistant lining block body II4.1, one side of the wear-resistant lining block body II4.1 is provided with a concave-convex snap button II4.2, and the other side is provided with a 45° material guide boss 4.3, the concave-convex snap button I3.2 and the concave-convex snap button II4.2 are matched with the perforated metal inner hooks 2, and the boss 3.3 and the 45° material guide boss 4.3 on the same row of perforated metal inner hooks 2 form a spiral boss. Example 2
[0028] like Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 8 , Fig. 9 , Fig.10 and Fig.11As shown, the utility model discloses an improved structure of the inner cylinder of a rotary kiln for sintering lithium / sodium positive electrode materials at a temperature above 800°C by gas-fired flame-muffle, which comprises a perforated metal cylinder 1, on the inner wall of which a plurality of rows of perforated metal inner hooks 2 are arranged, which are fastened and connected by fasteners, and the fasteners are screws or bolts, and the perforated metal cylinder 1, the perforated metal inner hooks 2 and the fasteners are all made of the same material, and their high temperature resistance temperature exceeds 800°C, and the perforated metal inner hooks 2 comprise metal inner hooks Ⅰ2.1 and metal inner hooks Ⅱ2.2, which are connected by a perforated connecting edge 2.3, and the metal inner hooks Ⅰ2.1 and metal inner hooks Ⅱ2.2 are both V-shaped, and the perforated connecting edge 2.3 is a long strip, and corrosion-resistant wear-resistant lining blocks Ⅰ3 and corrosion-resistant wear-resistant lining blocks Ⅱ4 are adjacently arranged on the same row of perforated metal inner hooks 2 The corrosion-resistant wear-resistant lining block I3 includes a wear-resistant lining block body I3.1, a concave-convex snap buckle I3.2 is provided on one side of the wear-resistant lining block body I3.1, a boss 3.3 is provided on the other side, a protrusion I3.4 is provided at one end of the wear-resistant lining block body I3.1, and a groove I3.5 is provided at the other end, the corrosion-resistant wear-resistant lining block II4 includes a wear-resistant lining block body II4.1, a concave-convex snap buckle II4.2 is provided on one side of the wear-resistant lining block body II4.1, and a 45° material guide boss 4.3 is provided on the other side, a protrusion II4.4 is provided at one end of the wear-resistant lining block body II4.1, and a groove II4.5 is provided at the other end, the concave-convex snap buckle I3.2 and the concave-convex snap buckle II4.2 are matched with the perforated metal inner hook 2, and the boss 3.3 and the 45° material guide boss 4.3 on the same row of perforated metal inner hooks 2 form a spiral boss.
[0029] The utility model discloses a perforated metal cylinder and a corrosion-resistant wear-resistant liner connected by a perforated metal inner hook, which is convenient to connect, light in weight and small in rotational load; a natural gas spray gun is used for flame sintering, and the perforated metal cylinder, the perforated metal inner hook and the fasteners are made of the same material, and their high temperature resistance temperature exceeds 800°C, and there is basically no harmful substances in the tail gas after natural gas combustion and no high temperature oxidation and shedding on the inner surface of the cylinder to pollute the positive electrode material, and the product quality is high; the corrosion-resistant wear-resistant liner I includes a wear-resistant liner body I, and the wear-resistant liner body I is One side is provided with a concave and convex snap buckle I, and the other side is provided with a boss. The corrosion-resistant wear-resistant lining block II includes a wear-resistant lining block body II, one side of the wear-resistant lining block body II is provided with a concave and convex snap buckle II, and the other side is provided with a 45° material guide boss. The bosses and the 45° material guide bosses on the same row of perforated metal inner hooks form a spiral boss with spiral transmission, which effectively improves product quality; the perforated metal cylinder and the perforated metal inner hook are screwed on the cylinder to hang the wear-resistant lining block in reverse, which effectively solves the risk of high temperature thermal expansion caused by electric welding of the metal cylinder and the metal hook in the past.
[0030] The present invention provides a thought and method. There are many methods and ways to implement the technical solution. The above is only the preferred implementation mode of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention. All components not specified in this embodiment can be implemented by existing technologies.
Claims
1. Improved structure of the inner cylinder of the rotary kiln for gas-fired flame-muffle sintering of lithium / sodium positive electrode materials at temperatures above 800°C, characterized by: The invention comprises a perforated metal cylinder (1), wherein a plurality of rows of perforated metal inner hooks (2) are arranged on the inner wall of the perforated metal cylinder (1), and the rows of perforated metal inner hooks (2) are fastened and connected by fasteners, and an anti-corrosion wear-resistant lining block I (3) and an anti-corrosion wear-resistant lining block II (4) are adjacently arranged on the same row of perforated metal inner hooks (2), wherein the anti-corrosion wear-resistant lining block I (3) comprises a wear-resistant lining block body I (3.1), and a concave-convex female buckle I (3.2) is arranged on one side of the wear-resistant lining block body I (3.1), and a boss (3.3) is arranged on the other side. 3.3), the corrosion-resistant wear-resistant lining block II (4) comprises a wear-resistant lining block body II (4.1), a concave-convex snap button II (4.2) is provided on one side of the wear-resistant lining block body II (4.1), and a 45° material guide boss (4.3) is provided on the other side, the concave-convex snap button I (3.2) and the concave-convex snap button II (4.2) are matched with the punched metal inner hook (2), and the boss (3.3) and the 45° material guide boss (4.3) on the same row of the punched metal inner hook (2) form a spiral boss.
2. The improved structure of the inner cylinder of the rotary kiln for gas-fired flame-muffle sintering of lithium / sodium positive electrode materials at a temperature above 800°C according to claim 1, characterized in that: The perforated metal inner hook (2) comprises a metal inner hook I (2.1) and a metal inner hook II (2.2), which are connected via a perforated connecting edge (2.3); the metal inner hook I (2.1) and the metal inner hook II (2.2) are both V-shaped, and the perforated connecting edge (2.3) is in the shape of a long strip.
3. The improved structure of the inner cylinder of the rotary kiln for gas-fired flame-muffle sintering of lithium / sodium positive electrode materials at a temperature above 800°C according to claim 1, characterized in that: The perforated metal cylinder (1), the perforated metal inner hook (2) and the fastener are all made of the same material, and their high temperature resistance exceeds 800°C.
4. The improved structure of the inner cylinder of the rotary kiln for gas-fired flame-muffle sintering of lithium / sodium positive electrode materials at a temperature above 800°C according to claim 1, characterized in that: A protrusion I (3.4) is provided at one end of the wear-resistant lining body I (3.1), and a groove I (3.5) is provided at the other end.
5. The improved structure of the inner cylinder of the rotary kiln for gas-fired flame-muffle sintering of lithium / sodium positive electrode materials at a temperature above 800°C according to claim 1, characterized in that: A protrusion II (4.4) is provided at one end of the wear-resistant lining block body II (4.1), and a groove II (4.5) is provided at the other end.
6. The improved structure of the inner cylinder of the rotary kiln for gas-fired flame-muffle sintering of lithium / sodium positive electrode materials at a temperature above 800°C according to claim 1, characterized in that: The fasteners are screws or bolts.