Atmosphere protection calcining furnace for silicon-oxygen negative electrode material
By employing an atmosphere release mechanism with multiple sets of individual tube groups arranged in a ring array in the atmosphere-protected calcining furnace for silicon-oxygen anode materials, the problems of uneven gas distribution and dead zone residues were solved, achieving consistency of the furnace atmosphere and stability of material properties.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2026-01-27
- Publication Date
- 2026-03-27
AI Technical Summary
Existing equipment has low gas replacement efficiency, and air is easily left in dead corners inside the furnace, resulting in uneven gas distribution and causing performance fluctuations within batches of silicon-oxygen anode materials.
A silicon-oxygen anode material atmosphere-protected calcination furnace was designed, employing an atmosphere release mechanism with multiple sets of individual tubes arranged in a ring array, including an input tube, a ring tube, a distribution tube, and individual tubes. High-temperature resistant fans and conical tubes are used to achieve uniform distribution and directional release of inert gas, ensuring the consistency of the atmosphere inside the furnace.
This achieved uniform diffusion of inert gas within the furnace, reduced residual air in dead zones, stabilized the calcination environment of the material, and reduced performance fluctuations within material batches.
Smart Images
Figure CN224051018U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to calcining furnace technical field especially relates to a silicon oxygen negative pole material atmosphere protection calcining furnace. BACKGROUND
[0002] The preparation of silicon oxygen negative pole usually takes silicon-based precursor (such as silicon powder, organic silicon compound) and oxide precursor (such as silicon dioxide, metal oxide) as raw material, after mixing, shaping, realizes the structure control and performance optimization of material through calcining process. The core role of calcining process includes: removing impurities and volatile matter, controlling crystal structure, improving particle morphology and porosity and interface modification.
[0003] The gas replacement efficiency of the existing equipment is low, air is easy to remain in the dead angle of the furnace, the gas distribution is uneven, and the atmosphere in different areas of the furnace is different, resulting in performance fluctuation within the material batch. UTILITY MODEL CONTENT
[0004] The utility model mainly provides a kind of silicon oxygen negative pole material atmosphere protection calcining furnace of inert gas distribution uniformity.
[0005] In order to realize the above-mentioned purpose, the utility model adopts the following technical scheme: a silicon oxygen negative pole material atmosphere protection calcining furnace, including chassis and electric control box, the middle part of the chassis is rotatably connected with furnace body heat insulation mechanism, the electric control box is fixedly connected on the outside of furnace body heat insulation mechanism, the inner chamber upper portion of furnace body heat insulation mechanism is fixedly installed with inner furnace mechanism, the inner chamber of furnace body heat insulation mechanism and located the outside of inner furnace mechanism is installed with electric heating element, the inner chamber upper portion of inner furnace mechanism is fixedly installed with atmosphere release mechanism, the atmosphere release mechanism includes input pipe, annular pipe, distribution pipe and single pipe group, multiple groups of single pipe group are annularly arrayed and located in the inner chamber of inner furnace mechanism, the single pipe group includes high-temperature resistant fan, cylindrical pipe and conical pipe, the input pipe is fixedly connected on the upper side of annular pipe, multiple groups of distribution pipe are welded on the lower side of annular pipe, the cylindrical pipe is screw-connected on the lower end of distribution pipe, the high-temperature resistant fan is installed on the upper end of cylindrical pipe, multiple groups of side holes are formed on the lower part of the outside of cylindrical pipe, the conical pipe is fixedly connected on the lower end of cylindrical pipe and the caliber gradually decreases.
[0006] The base frame provides a supporting foundation for the entire device, allowing the furnace insulation mechanism to rotate stably; the electrical control box controls the working status of the electric heating elements to achieve temperature regulation; the furnace insulation mechanism provides insulation and reduces heat loss; the inner furnace mechanism is the place where the silicon-oxygen anode material is calcined; the electric heating elements generate high temperatures to provide heat for calcination; the atmosphere release mechanism is responsible for the input, distribution, and release of inert gas to create a protective atmosphere; the input pipe is used to connect to an external inert gas source and guide the gas into the annular pipe; the annular pipe collects and distributes the inert gas, delivering the gas to each distribution pipe; the distribution pipe guides the gas in the annular pipe to the cylindrical pipe; in the individual pipe group, a high-temperature resistant fan drives the inert gas flow, accelerating the gas into the cylindrical pipe; the cylindrical pipe is the gas flow channel, and the side holes can assist in gas release; the tapered pipe, with its large upper opening and small lower opening, allows the inert gas to be released downwards along the inner wall of the inner furnace body at an accelerated rate, blowing away the gas near the silicon-oxygen anode material.
[0007] Preferably, the inner furnace mechanism includes a top plate, an inner furnace body, and a bottom plate. The cavity portion of the inner furnace body extends through the middle of the bottom plate, and the top plate is fitted to the upper opening of the inner furnace body. The opening on the top plate is used to insert silicon-oxygen anode material, and its extension can be closed to ensure the airtightness of the inner furnace body. The inner furnace body is the space for calcining the silicon-oxygen anode material, and its extension can be used to pour out the material after calcination. The bottom plate provides support and fixation for the inner furnace body.
[0008] Preferably, the cylindrical tube is fixedly connected through the middle of the top plate, and the annular tube is located above the top plate. The cylindrical tube penetrating the top plate facilitates the delivery of inert gas into the inner furnace body; the annular tube being located above the top plate facilitates connection with the input pipe and also facilitates the distribution of gas to each cylindrical tube.
[0009] Preferably, the furnace insulation mechanism includes an outer shell, a third insulation layer, a second insulation layer, and a first insulation layer. The electric heating element is fixedly installed inside the first insulation layer and electrically connected to the electrical control box via a wire. The outer shell wraps around each insulation layer, providing protection and support. The third, second, and first insulation layers sequentially wrap around the outside of the electric heating element, working together to achieve heat insulation and reduce heat transfer. The first insulation layer is made of lightweight refractory brick material with low thermal conductivity, providing both insulation and some fire resistance. The second insulation layer is made of expanded perlite, which is low in cost and used for auxiliary insulation. The third insulation layer is made of rock wool or mineral wool, which has strong corrosion resistance and is often used inside the shell.
[0010] Preferably, the second heat insulation layer is located outside the first heat insulation layer, the third heat insulation layer is located outside the second heat insulation layer, and the outer shell is located outside the third heat insulation layer. This layered structure effectively blocks heat transfer. The first heat insulation layer is close to the electric heating element, directly reducing heat diffusion outward. The second heat insulation layer helps to enhance the heat insulation effect. The third heat insulation layer further blocks heat and protects the outer shell. The outer shell, in turn, fixes and protects the internal layers.
[0011] Preferably, the base plate is fixedly connected to the upper end of the outer shell, and the extension of the inner furnace body abuts against the upper edge of the outer shell. The fixed connection between the base plate and the outer shell enhances the stability of the connection between the inner furnace mechanism and the furnace body insulation mechanism; the abutment of the extension of the inner furnace body against the upper edge of the outer shell facilitates material pouring out and also ensures the stability of the inner furnace body's position to a certain extent.
[0012] Compared with the prior art, the advantages and positive effects of this utility model are as follows:
[0013] 1. In this invention, multiple sets of individual tube groups are arranged in a ring array within the inner cavity of the furnace mechanism. Inert gas is evenly distributed to each distribution tube via the ring tubes, and then released through the side holes of the cylindrical tubes and directionally discharged through the conical tubes, allowing the gas to diffuse evenly within the furnace. This structural design ensures the consistency of the atmosphere in different areas of the furnace, reduces the performance fluctuations within material batches caused by uneven gas distribution, and provides a stable atmospheric environment for material calcination.
[0014] 2. In this invention, efficient gas replacement is achieved through an atmosphere release mechanism. An inert gas source is connected to the input pipe, and the gas flows through an annular pipe and a distribution pipe into a cylindrical pipe. A high-temperature fan accelerates the gas flow, and the conical pipe causes the inert gas to be released rapidly downwards along the inner wall of the furnace, quickly blowing away gas near the silicon-oxygen anode material and reducing residual air in dead zones. Simultaneously, during calcination, the furnace pressure can be maintained by adjusting the amount of inert gas released, further preventing air infiltration and solving the problems of low gas replacement efficiency and residual air in dead zones in existing equipment. Attached Figure Description
[0015] Figure 1 This utility model provides a structural schematic diagram of a silicon-oxygen anode material atmosphere-protected calcining furnace;
[0016] Figure 2 This utility model provides a schematic diagram of the internal structure of a silicon-oxygen anode material atmosphere-protected calcining furnace.
[0017] Figure 3 This utility model provides a schematic diagram of the internal furnace mechanism in an atmosphere-protected calcining furnace for silicon-oxygen anode materials.
[0018] Figure 4 This invention provides a schematic diagram of the atmosphere release mechanism in an atmosphere-protected calcining furnace for silicon-oxygen anode materials.
[0019] Legend: 1, chassis; 2, furnace body heat insulation mechanism; 21, shell; 22, third heat insulation layer; 23, second heat insulation layer; 24, first heat insulation layer; 3, electric control box; 4, atmosphere release mechanism; 41, input pipe; 42, annular pipe; 43, distribution pipe; 44, high-temperature-resistant fan; 45, cylindrical pipe; 46, side hole; 47, conical pipe; 5, inner furnace mechanism; 51, top plate; 52, inner furnace body; 53, bottom plate; 6, electric heating element. DETAILED DESCRIPTION
[0020] In order to enable the above-mentioned purposes, features and advantages of the present application to be more clearly understood, the present application will be further described below with reference to the drawings and embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.
[0021] In the following description, many specific details are set forth in order to provide a thorough understanding of the present application, but the present application can also be practiced without the specific details described herein, and therefore, the present application is not limited to the specific embodiments disclosed in the following description.
[0022] Please refer to Figures 1-4 The present application provides a technical solution: a silicon-oxygen negative electrode material atmosphere protection calcining furnace, comprising a chassis 1 and an electric control box 3, a furnace body heat insulation mechanism 2 is rotatably connected to the middle part of the chassis 1, the electric control box 3 is fixedly connected to the outer side of the furnace body heat insulation mechanism 2, an inner furnace mechanism 5 is fixedly installed on the upper part of the inner cavity of the furnace body heat insulation mechanism 2, an electric heating element 6 is installed in the inner cavity of the furnace body heat insulation mechanism 2 and located on the outer side of the inner furnace mechanism 5, an atmosphere release mechanism 4 is fixedly installed on the upper part of the inner cavity of the inner furnace mechanism 5, the atmosphere release mechanism 4 comprises an input pipe 41, an annular pipe 42, a distribution pipe 43 and a single pipe group, a plurality of single pipe groups are arranged in an annular array and located in the inner cavity of the inner furnace mechanism 5, the single pipe group comprises a high-temperature-resistant fan 44, a cylindrical pipe 45 and a conical pipe 47, the input pipe 41 is fixedly connected to the upper side of the annular pipe 42, a plurality of distribution pipes 43 are welded to the lower side of the annular pipe 42, the cylindrical pipe 45 is threadedly connected to the lower end of the distribution pipe 43, the high-temperature-resistant fan 44 is installed on the upper end of the cylindrical pipe 45, a plurality of side holes 46 are formed on the lower part of the outer side of the cylindrical pipe 45, and the conical pipe 47 is fixedly connected to the lower end of the cylindrical pipe 45 and gradually decreases in diameter.
[0023] The base frame 1 provides a supporting base for the whole device, so that the furnace body heat insulation mechanism 2 can be stably rotated; the electric control box 3 is used to control the working state of the electric heating element 6, so as to realize temperature regulation; the furnace body heat insulation mechanism 2 plays a role of heat insulation and heat preservation, and reduces heat loss; the inner furnace mechanism 5 is a place for calcining silicon-oxygen negative electrode material; the electric heating element 6 works to generate high temperature and provide heat for calcination; the atmosphere releasing mechanism 4 is responsible for input, distribution and release of inert gas, and creates a protective atmosphere; the input pipe 41 is used to connect an inert gas source and guide the gas into the annular pipe 42; the annular pipe 42 plays a role of collecting and distributing inert gas, and delivers the gas to each distribution pipe 43; the distribution pipe 43 guides the gas in the annular pipe 42 to the cylindrical pipe 45; in the single pipe group, the high-temperature-resistant fan 44 pushes the inert gas to flow and accelerates the gas to enter the cylindrical pipe 45; the cylindrical pipe 45 is a passage for gas flow, and the side hole 46 can assist the release of the gas; the conical pipe 47 has a large upper opening and a small lower opening, so that the inert gas can be accelerated to release along the inner wall of the inner furnace body 52 downward, and the gas near the silicon-oxygen negative electrode material can be blown away.
[0024] As shown in Figure 3 , the inner furnace mechanism 5 includes a top plate 51, an inner furnace body 52 and a bottom plate 53, the cavity part of the inner furnace body 52 penetrates through the middle part of the bottom plate 53, and the top plate 51 is attached and installed at the upper opening position of the inner furnace body 52. The opening on the top plate 51 is used to put in silicon-oxygen negative electrode material, and its extension part can be closed to ensure the sealing of the inner furnace body 52; the inner furnace body 52 is a space for accommodating silicon-oxygen negative electrode material for calcination, and its extension part can be used to pour out the material after calcination is completed; the bottom plate 53 plays a role of supporting and fixing the inner furnace body 52.
[0025] As shown in Figure 3 and Figure 4 , the cylindrical pipe 45 penetrates and is fixedly connected to the middle part of the top plate 51, and the annular pipe 42 is located above the top plate 51. The cylindrical pipe 45 penetrates the top plate 51, so as to conveniently deliver inert gas to the inside of the inner furnace body 52; the annular pipe 42 is located above the top plate 51, which is convenient for connecting with the input pipe 41 and simultaneously convenient for distributing the gas to each cylindrical pipe 45.
[0026] As shown in Figure 2 , the furnace body heat insulation mechanism 2 includes an outer shell 21, a third heat insulation layer 22, a second heat insulation layer 23 and a first heat insulation layer 24, and the electric heating element 6 is fixedly installed on the inner side of the first heat insulation layer 24 and is electrically connected with the electric control box 3 through a wire. The outer shell 21 wraps the heat insulation layers to play a role of protection and support; the third heat insulation layer 22, the second heat insulation layer 23 and the first heat insulation layer 24 are wrapped on the outer side of the electric heating element 6 in sequence, and together realize heat insulation and heat preservation to reduce heat transfer to the outside; the first heat insulation layer 24 is made of light-weight refractory brick material, has a small thermal conductivity coefficient, and has heat insulation and certain fire resistance; the second heat insulation layer 23 is made of expanded perlite product, has low cost and is used to assist heat insulation; the third heat insulation layer 22 is made of rock wool or mineral wool product, has strong corrosion resistance and is commonly used on the inner side of the shell.
[0027] As Figure 2 shown, the second heat insulation layer 23 is located outside the first heat insulation layer 24, the third heat insulation layer 22 is located outside the second heat insulation layer 23, and the outer shell 21 is located outside the third heat insulation layer 22. Such a layered structure can effectively block heat transfer. The first heat insulation layer 24 is close to the electric heating element 6, directly reducing the spread of heat outward. The second heat insulation layer 23 assists in enhancing the heat insulation effect. The third heat insulation layer 22 further blocks heat and protects the outer shell 21. The outer shell 21 then fixes and protects the internal layers.
[0028] As Figure 2 and Figure 3 shown, the bottom plate 53 is fixedly connected to the upper end of the outer shell 21, and the extension of the inner furnace body 52 abuts against the upper edge of the outer shell 21. The fixed connection of the bottom plate 53 and the outer shell 21 enhances the stability of the connection between the inner furnace mechanism 5 and the furnace body heat insulation mechanism 2. The abutment of the extension of the inner furnace body 52 against the upper edge of the outer shell 21 facilitates material pouring and ensures the position stability of the inner furnace body 52 to a certain extent.
[0029] The use method and working principle of the device are as follows: in use, the silicon-oxygen negative electrode material is poured into the inner furnace body 52 through the opening of the top plate 51, the input pipe 41 is externally connected to the inert gas source, the high-temperature-resistant fan 44 is controlled to work and rotate, the inert gas enters the annular pipe 42 through the input pipe 41, and under the action of the high-temperature-resistant fan 44, the inert gas enters the cylindrical pipe 45 from the multiple distribution pipes 43 respectively. The upper end of the conical pipe 47 is large, and the lower end is small. The inert gas accelerates along the inner wall of the inner furnace body 52 and is released downward, blowing away the gas near the silicon-oxygen negative electrode material. After a period of time, the extension of the closed top plate 51 is closed, and the electric heating element 6 is controlled to work by the electric control box 3 to generate high temperature, so as to calcine the silicon-oxygen negative electrode material in the inner furnace body 52. During the calcination process, the release amount of the inert gas source is reduced, and the loss amount of the inert gas is made up, so that the pressure in the inner furnace body 52 is in a relatively stable state, providing a stable atmospheric protection state for long-time calcination. The first heat insulation layer 24, the second heat insulation layer 23, and the third heat insulation layer 22 are wrapped outside the electric heating element 6 in turn, and the outer shell 21 wraps the three. The first heat insulation layer 24 is made of light-weight refractory brick material, has a small thermal conductivity, and has heat insulation and certain fire resistance. The second heat insulation layer 23 is made of expanded perlite product, has low cost, and is used for auxiliary heat insulation. The third heat insulation layer 22 is made of rock wool or mineral wool product, has strong corrosion resistance, and is commonly used inside the shell. After the calcination is completed, the electric heating element 6 stops working, the lid and the extension plug of the top plate 51 are opened, the handrails outside the outer shell 21 are pushed, the furnace body heat insulation mechanism 2 is rotated in the middle of the chassis 1, and the calcined material in the inner furnace body 52 is poured out from the extension.
[0030] The above merely describes preferred embodiments of the present application, and is not intended to limit the present application in other forms, and any skilled person in the art can modify or change the above disclosed technical content to equivalent embodiments applied to other fields with equivalent changes, but any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present application without departing from the technical scheme of the present application still falls within the protection scope of the present application.
Claims
1. A silicon-oxygen negative electrode material atmosphere protection calcining furnace comprising a chassis (1) and an electric control box (3), characterized in that: The middle part of the chassis (1) is rotatably connected with a furnace body heat insulation mechanism (2), the electric control box (3) is fixedly connected to the outer side of the furnace body heat insulation mechanism (2), the inner cavity upper part of the furnace body heat insulation mechanism (2) is fixedly installed with an inner furnace mechanism (5), the inner cavity of the furnace body heat insulation mechanism (2) and located outside the inner furnace mechanism (5) is installed with an electric heating element (6), the inner cavity upper part of the inner furnace mechanism (5) is fixedly installed with an atmosphere releasing mechanism (4), the atmosphere releasing mechanism (4) comprises an input pipe (41), an annular pipe (42), a distribution pipe (43) and a single pipe group, a plurality of groups of the single pipe group are annularly arranged in the inner cavity of the inner furnace mechanism (5), the single pipe group comprises a high-temperature-resistant fan (44), a cylindrical pipe (45) and a conical pipe (47), the input pipe (41) is fixedly connected to the upper side of the annular pipe (42), a plurality of groups of the distribution pipe (43) are welded to the lower side of the annular pipe (42), the cylindrical pipe (45) is threadedly connected to the lower end of the distribution pipe (43), the high-temperature-resistant fan (44) is installed on the upper end of the cylindrical pipe (45), a plurality of side holes (46) are formed in the lower part of the outer side of the cylindrical pipe (45), and the conical pipe (47) is fixedly connected to the lower end of the cylindrical pipe (45) and gradually decreases in diameter.
2. The silicon-oxygen negative electrode material atmosphere protection calcining furnace according to claim 1, characterized in that: The inner furnace mechanism (5) comprises a top plate (51), an inner furnace body (52) and a bottom plate (53), the cavity part of the inner furnace body (52) penetrates through the middle part of the bottom plate (53), and the top plate (51) is attached and installed above the opening position of the inner furnace body (52).
3. The silicon-oxygen negative electrode material atmosphere protection calcining furnace according to claim 2, characterized in that: The cylindrical pipe (45) penetrates and is fixedly connected to the middle part of the top plate (51), and the annular pipe (42) is located above the top plate (51).
4. The silicon-oxygen negative electrode material atmosphere protection calcining furnace according to claim 3, characterized in that: The furnace body heat insulation mechanism (2) comprises an outer shell (21), a third heat insulation layer (22), a second heat insulation layer (23) and a first heat insulation layer (24), the electric heating element (6) is fixedly installed on the inner side of the first heat insulation layer (24) and is electrically connected with the electric control box (3) through wires.
5. The silicon-oxygen negative electrode material atmosphere protection calcining furnace according to claim 4, characterized in that: The second heat insulation layer (23) is located on the outer side of the first heat insulation layer (24), the third heat insulation layer (22) is located on the outer side of the second heat insulation layer (23), and the outer shell (21) is located on the outer side of the third heat insulation layer (22).
6. The silicon-oxygen negative electrode material atmosphere protection calcining furnace according to claim 5, characterized in that: The bottom plate (53) is fixedly connected to the upper end of the outer shell (21), and the extension part of the inner furnace body (52) abuts against the upper edge of the outer shell (21).