A positive and negative electrode material fluidized sintering furnace

Abstract

The present invention relates to the field of sintering of battery materials, and particularly to a fluidized sintering furnace for positive and negative electrode materials, which includes a furnace body. A channel-type furnace chamber is arranged inside the furnace body. A heating unit for providing the temperature required for material sintering is arranged in the channel-type furnace chamber. An inlet is arranged at one end of the channel-type furnace chamber, and a discharge port is arranged at the other end. A plurality of inlet pipes are arranged at the bottom of the channel-type furnace chamber from the inlet to the discharge port. The inlet pipes introduce pressurized gas into the channel-type furnace chamber. The material entering from the inlet is blown up by the pressurized gas and tumbles and floats towards the discharge port, realizing dynamic sintering. The above-mentioned fluidized sintering furnace for positive and negative electrode materials realizes the dynamic sintering method of tumbling of materials in the furnace body, with sufficient and efficient sintering, no need for pot loading and conveying mechanisms, simplifies the internal structure of the furnace, avoids component interference, and ensures the sintering efficiency and quality.

Description

Technical Field

[0001] The present invention relates to the field of sintering of battery materials, and particularly to a fluidized sintering furnace for positive and negative electrode materials. Background Art

[0002] When preparing the positive and negative electrode materials of existing lithium batteries, sodium batteries, etc., the raw materials need to be first loaded into a crucible, and then the crucible is placed in a kiln for sintering. Since the positive and negative electrode materials of the battery have high requirements for composition, and the incorporation of metals such as Zn, Cu, and Sn is prohibited, the requirements for the material of the loading crucible are also very high. In addition, during the sintering process, the crucible transfer and conveying mechanism is in a high temperature for a long time, and its service life will be greatly reduced, and the risk of impurity mixing is increased. In addition, when the materials placed in the crucible are sintered, there may be situations where the local temperature is insufficient or the temperature difference gradient is large, which easily causes problems such as incomplete sintering, uneven product composition and particle size, affecting the sintering quality and efficiency. Summary of the Invention

[0003] Based on the above problems, the purpose of the present invention is to provide a fluidized sintering furnace for positive and negative electrode materials, which realizes efficient sintering and transfer of materials, eliminates interference with the product composition during the sintering process, improves the sintering effect, and meets the requirements for the preparation of battery materials.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] A fluidized sintering furnace for positive and negative electrode materials, which includes a furnace body. A channel-type furnace chamber is arranged in the furnace body. A heating unit for providing the temperature required for material sintering is arranged in the channel-type furnace chamber. An inlet is arranged at one end of the channel-type furnace chamber, and a discharge port is arranged at the other end. A plurality of air inlet pipes are arranged at the bottom of the channel-type furnace chamber from the inlet to the discharge port. The air inlet pipes introduce pressurized gas into the channel-type furnace chamber. The materials entering from the inlet are blown up by the pressurized gas and flow towards the discharge port in a tumbling and floating manner, realizing dynamic sintering.

[0006] Optionally, a CVD spray pipe is arranged at the top of the channel-type furnace chamber. The CVD spray pipe sprays a solution into the channel-type furnace chamber. The solution is vaporized by high temperature and performs carbon coating on the tumbling and floating materials.

[0007] Optionally, the solution is any one of methanol, ethanol, acetone, hydrocarbon or carbon-hydrogen-oxygen compound.

[0008] Optionally, an air cavity is arranged in the furnace body and below the channel-type furnace chamber. Each air inlet pipe is communicated with the air cavity, and a preheating heating wire is arranged in the air cavity.

[0009] Optionally, the heating unit is a gas radiation tube or an electric heating tube.

[0010] Optionally, a blowing pipe is arranged at the inlet. The blowing pipe blows air into the channel-type furnace chamber, which is used to assist in feeding and feeding materials to the discharge port.

[0011] Optionally, the pressurized gas is nitrogen or oxygen.

[0012] Optionally, an exhaust port is provided at the top of the channel-type furnace chamber, the exhaust port is connected to a cyclone for gas-solid separation, an outer discharge pipe is provided at the top of the cyclone, and a discharge pipe is provided at the bottom of the cyclone.

[0013] Optionally, the discharge port is docked with a receiving bin, and a cooling unit is provided at the discharge port.

[0014] Optionally, the feed port is docked with the discharge port of the rotary kiln, and the material roughly processed by the rotary kiln freely falls into the feed port.

[0015] In summary, the beneficial effects of the present invention are that the positive and negative material fluidized sintering furnace realizes a dynamic sintering method in which the material tumbles in the furnace body, the sintering is sufficient and efficient, there is no need for a charging pot and a conveying mechanism, the structure inside the furnace is simplified, component interference is avoided, and the sintering efficiency and quality are ensured. Description of the Drawings

[0016] Figure 1 is a schematic structural diagram of the positive and negative material fluidized sintering furnace provided by the embodiment of the present invention.

[0017] In the figure:

[0018] 1, furnace body; 2, channel-type furnace chamber; 3, heating unit; 4, feed port; 5, discharge port; ⑥, intake pipe; 7, pressurized gas; 8, CVD nozzle; 9, gas chamber; 10, preheating heating wire; 11, blowing pipe; 12, exhaust port; 13, cyclone; 14, outer discharge pipe; 15, discharge pipe; 16, cooling unit; 17, rotary kiln. Detailed Embodiments

[0019] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, in which the same or similar reference numerals denote the same or similar components or components with the same or similar functions from beginning to end. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0020] In the description of the present invention, unless otherwise clearly defined and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, a mechanical connection, an electrical connection, or can be indirectly connected through an intermediate medium, and can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] In the description of the present invention, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the first feature and the second feature being in direct contact, or may include the first feature and the second feature not being in direct contact but being in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature. The first feature being "below", "beneath" and "underneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the first feature has a lower horizontal height than the second feature. The technical solution of the present invention will be further described below in conjunction with the accompanying drawings and through specific embodiments.

[0022] Please refer to Figure 1 As shown, the present preferred embodiment provides a positive and negative electrode material fluidized sintering furnace, including a furnace body 1. A channel-type furnace chamber 2 is arranged inside the furnace body 1. A heating unit 3 for providing the temperature required for material sintering is arranged in the channel-type furnace chamber 2. An inlet 4 is arranged at one end of the channel-type furnace chamber 2, and a discharge port 5 is arranged at the other end. A plurality of inlet pipes 6 are arranged at the bottom of the channel-type furnace chamber 2 from the inlet 4 to the discharge port 5. The inlet pipes 6 introduce pressurized gas 7 into the channel-type furnace chamber 2. The material entering from the inlet 4 is blown up by the pressurized gas 7 and tumbles and floats towards the discharge port 5, realizing dynamic sintering.

[0023] It can be seen that in view of the powdery battery material, adopting the form of blowing and conveying the material can make the material tumble and float. On the one hand, it improves the contact area of each material and ensures sufficient sintering. On the other hand, there is no need for the process of loading into pots, improving the overall efficiency and providing a new idea for material conveying in the sintering process.

[0024] Particularly, a CVD spray nozzle 8 is arranged at the top of the channel-type furnace chamber 2. The CVD spray nozzle 8 sprays a solution into the channel-type furnace chamber 2. The solution is vaporized by high temperature and performs carbon coating on the tumbling and floating material. Preferably, the solution is methanol, ethanol, acetone, hydrocarbon or carbon hydrooxide, etc., meeting the requirements for carbon coating. It should be noted that the sprayed liquid can also achieve counterflow with the pressurized gas 7, stabilizing the material to tumble in the middle area of the channel-type furnace chamber 2 and conveying the material orderly.

[0025] Particularly, an air chamber 9 is arranged inside the furnace body 1 and below the channel-type furnace chamber 2. Each inlet pipe 6 is communicated with the air chamber 9. A preheating heating wire 10 is arranged in the air chamber 9, and selective preheating can be carried out according to regional needs. Generally, preheating heating wires 10 need to be arranged near the inlet 4, and no preheating heating wires 10 are required at the discharge port 5.

[0026] Among them, the heating unit 3 here is preferably a gas radiation tube or an electric heating tube, meeting the environmental temperature requirements inside the channel-type furnace chamber 2.

[0027] The pressurized gas 7 here is preferably nitrogen or oxygen, meeting the requirements of the environmental atmosphere in the channel furnace 2.

[0028] Furthermore, a blowing pipe 11 is provided at the feed inlet 4. The blowing pipe 11 blows air into the channel furnace 2 to assist in feeding and conveying materials to the discharge port 5, preventing blockage at the feed inlet 4 and ensuring orderly material conveyance during the sintering process.

[0029] Particularly, the discharge port 5 is connected to a receiving bin, and a cooling unit 16 is provided at the discharge port 5. After most of the materials are sintered, since the bottom end of the channel furnace 2 is not provided with an inlet pipe 6, they will freely fall into the discharge port 5 to complete the discharging.

[0030] Particularly, an exhaust port 12 is provided at the top of the channel furnace 2. After the remaining part of the materials are sintered, they will flow towards the exhaust port 12 along with the air flow. A cyclone 13 for gas-solid separation is connected to the exhaust port 12. An external discharge pipe 14 is provided at the top of the cyclone 13, and a discharge pipe 15 is provided at the bottom of the cyclone 13 to collect the remaining part of the materials.

[0031] In addition, the feed inlet 4 is connected to the discharge port of the rotary kiln 17. The materials roughly processed by the rotary kiln 17 freely fall into the feed inlet 4, enabling the direct connection of this sintering furnace to the rotary kiln 17. Compared with the original process where materials from the rotary kiln 17 need to go through cooling and potting processes to enter the sintering furnace, it has high production efficiency, small equipment footprint, high energy utilization rate, and low energy consumption.

[0032] It can be seen that the above positive and negative material fluidized sintering furnace realizes a dynamic sintering method in which the materials tumble in the furnace body, with sufficient and efficient sintering, no need for potting and conveying mechanisms, simplifies the internal structure of the furnace, avoids composition interference, and ensures sintering efficiency and quality.

[0033] The above embodiments only illustrate the basic principles and characteristics of the present invention. The present invention is not limited by the above embodiments. Without departing from the spirit and scope of the present invention, there are various changes and modifications to the present invention, and these changes and modifications all fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. A positive and negative electrode material fluidized sintering furnace, characterized in that, It includes a furnace body (1), a channel-type furnace chamber (2) is arranged inside the furnace body (1), a heating unit (3) for providing the temperature required for material sintering is arranged in the channel-type furnace chamber (2), a feed inlet (4) is arranged at one end of the channel-type furnace chamber (2), the feed inlet (4) is docked with the discharge outlet of a rotary kiln (17), and the material roughly processed by the rotary kiln (17) freely falls into the feed inlet (4) without a loading pot and a conveying mechanism. A discharge outlet (5) is arranged at the other end of the channel-type furnace chamber (2). A plurality of air inlet pipes (6) are arranged at the bottom of the channel-type furnace chamber (2) from the feed inlet (4) to the discharge outlet (5). The air inlet pipes (6) introduce pressurized gas (7) into the channel-type furnace chamber (2). The material entering from the feed inlet (4) is blown up by the pressurized gas (7) and flows towards the discharge outlet (5) in a rolling and floating manner to achieve dynamic sintering.

2. The positive and negative electrode material fluidized sintering furnace according to claim 1, characterized in that, A CVD spray pipe (8) is arranged at the top of the channel-type furnace chamber (2). The CVD spray pipe (8) sprays a solution into the channel-type furnace chamber (2). The solution is vaporized by high temperature and carbon-coats the rolling and floating material.

3. The positive and negative electrode material fluidized sintering furnace according to claim 2, characterized in that, The solution is any one of methanol, ethanol, acetone, hydrocarbon or carbon-hydrogen-oxygen compound.

4. The positive and negative electrode material fluidized sintering furnace according to claim 1, characterized in that, An air cavity (9) is arranged inside the furnace body (1) and below the channel-type furnace chamber (2). Each of the air inlet pipes (6) is communicated with the air cavity (9), and a preheating heating wire (10) is arranged in the air cavity (9).

5. The anode and cathode material fluidized sintering furnace according to claim 1, characterized in that, The heating unit (3) is a gas radiation tube or an electric heating tube.

6. The positive and negative electrode material fluidized sintering furnace according to claim 1, characterized in that A blowing pipe (11) is arranged at the feed inlet (4). The blowing pipe (11) blows air into the channel-type furnace chamber (2) to assist in feeding and feeding the material towards the discharge outlet (5).

7. The positive and negative electrode material fluidized sintering furnace according to claim 1, characterized in that, The pressurized gas (7) is nitrogen or oxygen.

8. The positive and negative electrode material fluidized sintering furnace according to claim 1, characterized in that, An exhaust port (12) is arranged at the top of the channel-type furnace chamber (2). The exhaust port (12) is connected to a cyclone (13) for gas-solid separation. An outer discharge pipe (14) is arranged at the top of the cyclone (13), and a discharge pipe (15) is arranged at the bottom of the cyclone (13).

9. The positive and negative electrode material fluidized sintering furnace according to claim 1, characterized in that, The discharge outlet (5) is docked with a storage bin, and a cooling unit (16) is arranged at the discharge outlet (5).

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