CN210036231U

CN210036231U - High-temperature sintering equipment for cathode material

Info

Publication number: CN210036231U
Application number: CN201920590160.4U
Authority: CN
Inventors: 韩阳; 郭志强; 王芸; 杜先东
Original assignee: Contemporary Amperex Technology Co Ltd
Current assignee: Contemporary Amperex Technology Co Ltd
Priority date: 2019-04-26
Filing date: 2019-04-26
Publication date: 2020-02-07
Anticipated expiration: 2029-04-26

Abstract

The utility model relates to a negative electrode material high temperature sintering equipment. The high-temperature sintering equipment for the cathode material comprises: the rotary furnace comprises a feeding end, a discharging end and a furnace chamber, wherein the feeding end and the discharging end are oppositely arranged, the furnace chamber penetrates through the feeding end and the discharging end, and the furnace chamber is provided with an air inlet arranged at the discharging end and an air outlet arranged at the feeding end; the gas supply device is connected with the discharge end and communicated with the furnace chamber, and protective gas is input into the furnace chamber through the gas inlet; and the negative pressure generating device is connected with the feeding end and communicated with the furnace chamber, and the negative pressure generating device exhausts air to the furnace chamber through the exhaust port so as to generate negative pressure in the furnace chamber and enable protective gas to flow from the air inlet to the exhaust port. The utility model discloses negative pole material high temperature sintering equipment can effectively reduce the flammable and explosive gas that negative pole material sintering process produced and explode or the possibility of revealing, improves sintering process security.

Description

High-temperature sintering equipment for cathode material

Technical Field

The utility model relates to a battery technology field especially relates to an anode material high temperature sintering equipment.

Background

With the development of science and technology, secondary batteries are widely used in the fields of mobile electronics, new energy electric vehicles, large-scale energy storage devices and the like. In order to increase the energy density of the secondary battery, it is necessary to start with both structural design of the secondary battery and development of new materials. The development of new materials is mainly to develop anode materials with higher capacity. The negative electrode material of the novel lithium battery needs to be subjected to high-temperature sintering treatment. Flammable and explosive gas can be generated in the sintering process, and the safety of the sintering process is influenced.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides an anode material high temperature sintering equipment. The high-temperature sintering equipment for the cathode material can effectively reduce the possibility of explosion or leakage of flammable and combustible gas generated in the sintering process of the cathode material, and improve the safety of the sintering process.

On the one hand, the embodiment of the utility model provides an anode material high temperature sintering equipment is provided, include:

the rotary furnace comprises a feeding end, a discharging end and a furnace chamber, wherein the feeding end and the discharging end are oppositely arranged, the furnace chamber penetrates through the feeding end and the discharging end, and the furnace chamber is provided with an air inlet arranged at the discharging end and an air outlet arranged at the feeding end; the gas supply device is connected with the discharge end and communicated with the furnace chamber, and protective gas is input into the furnace chamber through the gas inlet; and the negative pressure generating device is connected with the feeding end and communicated with the furnace chamber, and the negative pressure generating device exhausts air to the furnace chamber through the exhaust port so as to generate negative pressure in the furnace chamber and enable protective gas to flow from the air inlet to the exhaust port.

According to an aspect of the embodiments of the present invention, the gas supply device includes a first heater for heating the shielding gas.

According to the utility model discloses an aspect, negative pole material high temperature sintering equipment still includes filter equipment and heat tracing device, and filter equipment is connected with the feed end and is linked together through gas vent and furnace chamber, and heat tracing device is used for heat tracing filter equipment.

According to the utility model discloses an aspect, negative pole material high temperature sintering equipment still includes pressure monitor, and filter equipment's import and export all set up pressure monitor.

According to the utility model discloses in one aspect of the embodiment, negative pole material high temperature sintering equipment still includes feed line and cooling module, and feed line is connected with the feed end and is linked together with the furnace chamber, and cooling module sets up on the section that exposes of feed line and is used for cooling feed line.

According to the utility model discloses an aspect, negative pole material high temperature sintering equipment still includes seal assembly, feed end and discharge end all set up seal assembly, seal assembly includes the sleeve and sets up the sealing filler in the sleeve, form accommodation space between sleeve and the rotary kiln, sealing filler fills in accommodation space, the sleeve passes through sealing filler and rotary kiln sealing connection, gas supply device still includes sealed gas pipeline, through sealed gas pipeline to accommodation space input protective gas, with form gas-tightly between sleeve and rotary kiln.

According to the utility model discloses an aspect, gas supply device still includes the second heater, and the second heater sets up in sealed gas transmission pipeline and is used for heating the protective gas in the sealed gas transmission pipeline.

According to the utility model discloses an aspect, negative pole material high temperature sintering equipment still includes the cooling tower, and the cooling tower is connected in order to receive and cool off discharge end exhaust material with the discharge end, and gas supply device includes the pressure control pipeline, and the pressure control pipeline is linked together with the inside cavity of cooling tower, and gas supply device passes through the pressure control pipeline and inputs protective gas to the inside cavity.

According to the utility model discloses an aspect, cathode material high temperature sintering equipment still includes oxygen concentration detector, and oxygen concentration detector is connected and is linked together through gas vent and furnace chamber with the feed end, detects the oxygen concentration of gas vent through oxygen concentration detector.

According to the utility model discloses in one aspect of the embodiment, negative pole material high temperature sintering equipment still includes the dustcoat, the medium supply device that is connected with the dustcoat and the medium output device that is connected with the dustcoat, the dustcoat set up in the rotary kiln periphery and with the rotary kiln between form annular cavity, through medium supply device to annular cavity input cooling medium, take out from cooling medium through medium output device from annular cavity.

The negative electrode material high-temperature sintering equipment provided by the utility model comprises a rotary furnace, a gas supply device and a negative pressure generating device. And uniformly mixing the cathode material with the high-temperature sintering equipment through a rotary furnace, and sintering the material to be sintered. The cathode material high-temperature sintering equipment conveys protective gas into the rotary furnace through the gas supply device so as to replace air, dust or harmful gas generated in the sintering process in the rotary furnace and protect materials to be sintered. The negative electrode material high-temperature sintering equipment enables the sintering process of the rotary furnace to be in a negative pressure state through the negative pressure generating device, and is beneficial to preventing harmful gas generated in the sintering process from escaping and leaking from the rotary furnace. Therefore, harmful gas generated in the sintering process of the high-temperature sintering equipment for the cathode material is not easy to explode in the rotary furnace or escape and leak from the rotary furnace, and the safety of the sintering process is effectively improved.

Drawings

Features, advantages and technical effects of exemplary embodiments of the present invention will be described below by referring to the accompanying drawings.

Fig. 1 is a schematic structural diagram of an apparatus for high-temperature sintering of an anode material according to an embodiment of the present invention;

fig. 2 is a schematic partial structural view of an apparatus for high-temperature sintering of an anode material according to an embodiment of the present invention;

fig. 3 is a schematic partial structural view of an apparatus for high-temperature sintering of an anode material according to another embodiment of the present invention;

fig. 4 is a flow chart of a high-temperature sintering method of the negative electrode material according to an embodiment of the present invention.

In the drawings, the drawings are not necessarily to scale.

Description of the labeling:

10. high-temperature sintering equipment for the cathode material; 11. a rotary kiln; 111. a feeding end; 112. a discharge end; 113. a furnace chamber; 113a, an air inlet; 113b, an exhaust port; 12. a gas supply device; 121. a first heater; 122. a second heater; 123. replacing the gas transmission pipeline; 124. sealing the gas transmission pipeline; 125. a pressure control line; 13. a negative pressure generating device; 14. a filtration device; 15. a heat tracing device; 16. a pressure monitor; 17. a feed line; 18. a cooling assembly; 181. a coolant inlet; 182. a coolant outlet; 19. a seal assembly; 191. a sleeve; 192. sealing and filling; 20. a cooling tower; 21. an oxygen concentration detector; 22. a housing; 23. a media supply; 24. a medium output device; 99. an accommodation space.

Detailed Description

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings and examples. The following detailed description of the embodiments and the accompanying drawings are provided to illustrate the principles of the invention, but are not intended to limit the scope of the invention, i.e., the invention is not limited to the described embodiments.

In the description of the present invention, it is to be noted that, unless otherwise specified, "a plurality" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", and the like, indicate orientations or positional relationships only for convenience in describing the present invention and to simplify the description, but do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The directional terms appearing in the following description are directions shown in the drawings and do not limit the specific structure of the present invention. In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood as the case may be, by those of ordinary skill in the art.

For a better understanding of the present invention, the following describes embodiments of the present invention in detail with reference to fig. 1 to 4.

The utility model discloses anode material high temperature sintering equipment 10 of embodiment can be used for producing the anode material.

Referring to fig. 1, the anode material high temperature sintering apparatus 10 of the present embodiment includes a rotary kiln 11, a gas supply device 12 connected to the rotary kiln 11, and a negative pressure generating device 13 connected to the rotary kiln 11.

The rotary kiln 11 of the present embodiment includes a feed end 111 and a discharge end 112 disposed opposite to each other, and a furnace chamber 113 penetrating the feed end 111 and the discharge end 112. The furnace chamber 113 has an inlet 113a disposed at the discharge end 112 and an outlet 113b disposed at the feed end 111. The rotary kiln 11 may be pivotally supported on the mounting platform by a feed end 111 and a discharge end 112. The rotary furnace 11 is driven to rotate by a driving device so as to uniformly mix and crush the material to be sintered, which is added into the furnace chamber 113. The material to be sintered is then sintered by the rotary kiln 11. The material to be sintered can generate tiny dust and flammable and explosive gas in the sintering process.

The gas supply 12 of this embodiment is connected to the discharge end 112 and communicates with the furnace chamber 113. The gas supply device 12 supplies the shielding gas into the chamber 113 through the gas inlet 113 a. Like this, the protective gas can replace rotary furnace 11 with the gas and the dust in rotary furnace 11, thereby on the one hand, in sintering process, protective gas can protect and treat the sintering material, reduce and treat that sintering material and air contact produce the possibility of adverse reaction, and on the other hand, protective gas can in time drive the flammable and explosive gas that produces in the sintering process from rotary furnace 11 fast, reduces the possibility that flammable and explosive gas explodes in rotary furnace 11, improves sintering process's security. Alternatively, the protective gas may be nitrogen or an inert gas. Preferably, the protective gas is nitrogen. In one example, the gas supply 12 of the present embodiment includes a gas source and a replacement gas line 123. The air source is connected with the rotary kiln 11 through a replacement air pipeline 123 and is communicated with the furnace chamber 113 through the replacement air pipeline 123.

The negative pressure generating device 13 of this embodiment is connected to the feeding end 111 and communicates with the furnace chamber 113. The negative pressure generator 13 evacuates the cavity 113 through the exhaust port 113b to generate a negative pressure in the cavity 113 and to flow the shielding gas from the inlet port 113a to the exhaust port 113 b. Therefore, the negative pressure generating device 13 is used for keeping the negative pressure state in the furnace chamber 113, on one hand, the escape of flammable and combustible gas from the rotary furnace 11 to the outside of the rotary furnace 11 can be reduced, and the safety and the environmental protection performance in the sintering process are effectively improved; on the other hand, it is advantageous to increase the diffusion rate of the shielding gas from the discharge end 112 to the feed end 111 so that the shielding gas can replace air, dust, or flammable and combustible gas in the rotary kiln 11 more quickly. In one example, the negative pressure generating device 13 of the present embodiment includes a vacuum pump and a connection pipe. The evacuation pump is connected to the rotary kiln 11 through a connecting pipe and is communicated with the kiln chamber 113 through a connecting pipe. Optionally, the negative pressure generating device 13 of this embodiment can maintain a negative pressure state of 0Pa to-200 Pa in the cavity 113.

The high-temperature sintering equipment 10 for the negative electrode material of the embodiment of the utility model comprises a rotary furnace 11, a gas supply device 12 and a negative pressure generating device 13. The anode material high-temperature sintering equipment 10 uniformly mixes and sinters the materials to be sintered through a rotary furnace 11. The anode material high-temperature sintering equipment 10 conveys protective gas into the rotary furnace 11 through the gas supply device 12 so as to replace air, dust or harmful gas generated in the sintering process in the rotary furnace 11 and protect materials to be sintered. The negative electrode material high-temperature sintering equipment 10 enables the sintering process of the rotary furnace 11 to be in a negative pressure state through the negative pressure generating device 13, so that the harmful gas generated in the sintering process can be prevented from escaping and leaking from the rotary furnace 11. Therefore, harmful gas generated by the anode material high-temperature sintering equipment 10 in the sintering process is not easy to explode in the rotary furnace 11 or escape and leak from the rotary furnace 11, the safety and the environmental protection performance in the sintering process are effectively improved, and the product quality of the sintered material is improved.

Referring to fig. 1, the gas supply device 12 of the present embodiment further includes a first heater 121. The first heater 121 is used for heating the shielding gas, and the shielding gas can be heated to a temperature higher than 400 ℃, so that the shielding gas input into the furnace chamber 113 is prevented from influencing the reaction process of the materials to be sintered due to low temperature, and the materials contained in the materials to be sintered are prevented from being condensed to influence the reaction process of the materials to be sintered. In one example, the gas supply device 12 of the present embodiment includes a replacement gas piping 123 communicating with the cavity 113 of the rotary kiln 11. The first heater 121 is disposed in the replacement gas transmission line 123. In one example, the first heater 121 includes a heating wire. The heating wire can be wound around the outside of the replacement gas pipe 123, and heats the replacement gas pipe 123 after being energized. In another example, the first heater 121 includes a hot oil supply unit and a jacket. The sleeve pipe has the chamber that holds fluid and with hold oil inlet and the oil-out that the chamber is linked together. The sleeve can be sleeved outside the replacement gas transmission pipeline 123, and the replacement gas transmission pipeline 123 is heated by circulating hot oil.

Referring to fig. 1 and 2, the high-temperature sintering apparatus 10 for anode material of the present embodiment further includes a filtering device 14 and a heat tracing device 15. The filter assembly 14 is connected to the feed end 111 and is in communication with the chamber 113 through an exhaust port 113 b. The filtering device 14 is capable of filtering the exhaust discharged from the furnace chamber 113 to filter out powder contained in the exhaust, thereby purifying the exhaust. After being filtered by the filtering device 14, the gaseous substances contained in the exhaust form an exhaust gas and are discharged to a downstream exhaust gas treatment device. The powder filtered by the filtering device 14 can be returned to the furnace chamber 113 to continue to participate in the sintering reaction, thereby reducing the material waste and the production cost. The heat tracing device 15 is used for tracing the filter device 14, thereby keeping the filter device 14 in a high temperature state of more than 400 ℃, so as to prevent the filter device 14 from being blocked due to the condensation of the powder filtered by the filter device 14. In one embodiment, the filter device 14 includes a dust collector and a filter duct. The dust collector is communicated with the furnace chamber 113 of the rotary furnace 11 through a filtering pipeline. The interior of the dust remover is provided with a high-temperature resistant ceramic filter element. The heat tracing device 15 includes a heating wire or a heating oil pipe wound on the dust collector and/or the filtering pipe. In one embodiment, the filtering device 14 is disposed upstream of the negative pressure generating device 13 so that the filtering device 14 can filter the powder in advance when the air and the powder in the rotary kiln 11 are drawn out by the negative pressure generating device 13.

In one embodiment, referring to fig. 1, the apparatus 10 for high temperature sintering of anode material further comprises a pressure monitor 16. Both the inlet and outlet of the filter device 14 are provided with pressure monitors 16. The pressure monitor 16 is capable of monitoring the inlet and outlet pressures of the filter apparatus 14 in real time. When the filtering device 14 is blocked or the filtering performance of the filter element per se is reduced due to the powder condensation problem, the pressure difference value of the inlet and the outlet monitored by the pressure monitor 16 can quickly and accurately judge that the filtering device 14 breaks down, so that the filtering device 14 can be cleaned or the filter element can be replaced in time, and the production efficiency is improved.

Referring to fig. 1 and 2, the anode material high-temperature sintering apparatus 10 of the present embodiment further includes a feeding line 17 and a cooling assembly 18. Feed line 17 is connected to feed end 111 and communicates with furnace chamber 113 through exhaust port 113 b. A cooling assembly 18 is disposed on the exposed section of the feed line 17 and is used to cool the feed line 17. In the process of putting the materials to be sintered in the feeding pipeline 17, the feeding pipeline 17 is cooled by the cooling assembly 18, so that the heat in the rotary furnace 11 is not easily conducted to the feeding pipeline 17, the materials to be sintered in the feeding pipeline 17 are liquefied and bonded to the feeding pipeline 17, and the possibility of blockage of the feeding pipeline 17 is reduced. In one embodiment, the cooling assembly 18 includes an annular sleeve that is disposed about the exterior of the feed line 17. The annular sleeve has a receiving chamber for receiving a cooling medium and a cooling fluid inlet 181 and a cooling fluid outlet 182 connected to the receiving chamber. Optionally, the cooling medium is water.

Referring to fig. 2 and 3, the anode material high-temperature sintering apparatus 10 of the present embodiment further includes a sealing assembly 19. The feed end 111 and the discharge end 112 are each provided with a sealing assembly 19. The seal assembly 19 includes a sleeve 191 and a seal packing 192 disposed within the sleeve 191. An accommodating space 99 is formed between the sleeve 191 and the rotary kiln 11. The packing 192 is filled in the accommodating space 99. The feed end 111 and the discharge end 112 of the rotary furnace 11 are connected with the correspondingly arranged sleeves 191 in a sealing way through sealing packing 192. The feed end 111 and the sealing packing 192 and the discharge end 112 and the sealing packing 192 are in dynamic sealing fit. The gas supply 12 also includes a gas source and a sealed gas line 124. Protective gas is supplied into the accommodating space 99 through the seal gas pipe 124 to form a gas seal between the sleeve 191 and the rotary kiln 11. The sealing assembly 19 forms double sealing on the feeding end 111 and the discharging end 112 through a packing sealing and air sealing structure, so that the escape and leakage of harmful gas generated in the sintering process from the rotary furnace 11 to the external environment are effectively reduced. Because the interior of the rotary furnace 11 needs to be kept in a negative pressure state, the sealing assembly 19 forms a double sealing mode for the feeding end 111 and the discharging end 112 through a packing sealing and air sealing structure, so that the possibility that the combustible gas in the rotary furnace 11 explodes due to the fact that external oxygen enters the rotary furnace 11 and the oxygen concentration exceeds a safety value can be reduced, and the safety of the rotary furnace 11 in the operation process is improved. In one embodiment, the seal assembly 19 includes an end plate sealingly connected to the sleeve 191. The replacement gas pipeline 123, the connecting pipeline or the feeding pipeline 17 penetrates through the end plate to be communicated with the furnace chamber 113 of the rotary furnace 11 and is connected with the end plate in a sealing way.

In one embodiment, referring to FIG. 1, the gas supply 12 further includes a second heater 122. The second heater 122 is disposed on the sealed gas transmission pipeline 124 and is used for heating the protective gas in the sealed gas transmission pipeline 124, and the protective gas can be heated to a temperature higher than 400 ℃, so as to prevent the protective gas input into the furnace chamber 113 from affecting the reaction process of the material to be sintered due to low temperature, and prevent some materials contained in the material to be sintered from being condensed and affecting the reaction process of the material to be sintered.

Referring to fig. 2, the anode material high-temperature sintering apparatus 10 of the present embodiment further includes an oxygen concentration detector 21. Oxygen concentration detector 21 is connected to feed end 111 and is in communication with furnace chamber 113 through exhaust port 113 b. The oxygen concentration in the area of the exhaust port 113b of the rotary kiln 11 can be detected by the oxygen concentration detector 21. Thus, on one hand, the oxygen concentration detector 21 is used for monitoring the gas concentration value in the exhaust port 113b area of the rotary furnace 11 in real time, so that the possibility that the oxygen concentration exceeds the safety value due to the fact that external oxygen enters the rotary furnace 11, flammable and explosive gas in the rotary furnace 11 explodes can be reduced, and the safety of the rotary furnace 11 in the operation process is improved; on the other hand, in the event of a failure of the seal between the seal assembly 19 and the feed end 111 and between the seal assembly 19 and the discharge end 112, the oxygen concentration value in the region of the exhaust port 113b of the rotary kiln 11 increases. The oxygen concentration value in the area of the exhaust port 113b of the rotary kiln 11 is monitored in real time by the oxygen concentration detector 21, so that the sealing state between the sealing assembly 19 and the feed end 111 and between the sealing assembly 19 and the discharge end 112 can be monitored in real time, and the wear or aging of the sealing packing 192 can be fed back. When the sealing failure occurs between the sealing assembly 19 and the furnace body, the worn failure or the aged failure of the sealing filler 192 can be indirectly judged, and the sealing filler 192 needs to be replaced in time or external acting force is applied to the worn sealing filler 192 to deform the sealing filler 192 to compensate the abrasion loss, so that the sealing state between the sealing assembly 19 and the furnace body is recovered. Therefore, the utility model discloses anode material high temperature sintering equipment 10 can judge seal filler 192 wearing and tearing condition and encapsulated situation through oxygen concentration detector 21 in real time, accurately, and the testing process is simple and efficient, no longer needs artifical scene point to examine and detect seal filler 192 wearing and tearing condition and encapsulated situation, effectively reduces testing process intensity of labour.

Referring to fig. 1, the anode material high-temperature sintering apparatus 10 of the present embodiment further includes a cooling tower 20. The cooling tower 20 is coupled to the discharge end 112 to receive and cool material discharged from the discharge end 112. The gas supply 12 also includes a pressure control line 125. The pressure control line 125 communicates with the interior cavity of the cooling tower 20. The gas supply 12 feeds protective gas to the internal cavity via a pressure control line 125. After the rotary kiln 11 completes the sintering process, the sintering powder in the furnace chamber 113 enters the cooling tower 20. The cooling tower 20 cools the sintering powder in the tower to normal temperature and then conveys the sintering powder to downstream equipment under the action of pneumatic conveying. The pressure control is carried out by inputting protective gas into the tower, so that the negative pressure condition in the tower is prevented when the sintering powder is output from the cooling tower 20, and the stable output flow of the sintering powder is ensured. In one embodiment, the cooling tower 20 is provided with paddles. The cooling tower 20 includes an external jacket. The outer jacket has a receiving cavity for receiving a cooling liquid. Cooling fluid is circulated through the containment chamber of the outer jacket to maintain the cooling tower 20 in a cooled condition.

Referring to fig. 1, the high-temperature sintering apparatus 10 for anode material of the present embodiment further includes a housing 22, a medium supply device 23 connected to the housing 22, and a medium output device 24 connected to the housing 22. The outer cover 22 is disposed on the outer periphery of the rotary kiln 11 and forms a closed annular cavity with the rotary kiln 11. The annular space is supplied with a cooling medium via a medium supply 23. The cooling medium is removed from the annular space by a medium outlet 24. Optionally, the cooling medium is a cooling gas, such as air. After the rotary kiln 11 has completed the sintering process, the medium supply 23 and medium output 24 are activated to allow cooling medium to enter and pass through the annular cavity to rapidly cool the rotary kiln 11 and the sinter material. After the rotary kiln 11 is cooled to a predetermined temperature, the sintering material is discharged from the discharge end 112, and then the material to be sintered is newly charged for the next sintering operation. In one embodiment, the cooling medium is a cooling gas. The medium supply device 23 includes a medium delivery pump and a connection pipe. The medium delivery pump is communicated with the annular cavity through a connecting pipeline. The medium output device 24 includes a heat removal fan and a connection duct. The heat removing fan is communicated with the annular cavity through a connecting pipeline. The annular cavity can be pumped after the heat removal fan is started. In one embodiment, the material of the outer cover 22 is a thermal insulating material, which has a thermal insulating function by itself, and is beneficial to improve the cooling efficiency. In another embodiment, the high-temperature sintering apparatus 10 further includes a thermal insulating layer disposed on the outer cover 22, which is beneficial to improve the cooling efficiency.

In one embodiment, the gas supply 12 further comprises a mass flow control valve and a pressure sensor. The replacement gas transmission pipeline, the sealing gas transmission pipeline 124 and the pressure control pipeline 125 are all provided with a mass flow control valve and a pressure sensor, so that accurate control over the flow and the pressure of the replacement gas transmission pipeline 123, the sealing gas transmission pipeline 124 and the pressure control pipeline 125 can be achieved, and remote control over the flow and the pressure of the replacement gas transmission pipeline, the sealing gas transmission pipeline 124 and the pressure control pipeline 125 can also be achieved.

Referring to fig. 4, an embodiment of the present invention further provides a method for sintering a negative electrode material at a high temperature, including the following steps:

inputting a material to be sintered into the rotary furnace 11, starting the rotary furnace 11, and stirring and uniformly mixing the material to be sintered through the rotary furnace 11;

adjusting the internal pressure of the rotary kiln 11 to 0Pa to-200 Pa;

introducing protective gas with the temperature of more than or equal to 400 ℃ into the rotary furnace 11 to replace the gas and the dust in the rotary furnace 11;

heating the rotary furnace 11 to a preset temperature, and sintering the material to be sintered;

the rotary furnace 11 runs for a preset time to complete the sintering process;

and cooling the rotary furnace 11 and discharging the sintering material.

In this embodiment, 11 can slow rotations of rotary furnace among the sintering process to stir and the mixing to adding into self inside sintering material of treating, the stirring process can make and treat that sintering material takes place the breakage, thereby saves the crushing process after going into the compounding process before the stove and the traditional handicraft ejection of compact, simplifies manufacturing procedure, improves production efficiency. The internal pressure of the rotary kiln 11 is maintained at a negative pressure state of 0Pa to-200 Pa, which is beneficial to reducing the possibility that harmful gas generated in the sintering process escapes from the rotary kiln 11 and leaks to the external atmosphere. Then introducing 400 ℃ high-temperature protective gas into the rotary furnace 11 to replace air and harmful gas in the furnace, thereby solving the problem of leakage of the harmful gas generated in the sintering process, reducing artificial contact and reducing safety risk. The inlet flow and pressure of the protective gas introduced into the rotary kiln 11 can be remotely set and monitored.

While the invention has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention, and particularly, various features shown in the various embodiments may be combined in any combination as long as there is no structural conflict. The present invention is not limited to the particular embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.

Claims

1. A high-temperature sintering device for cathode materials is characterized by comprising:

the rotary furnace comprises a feeding end and a discharging end which are arranged oppositely, and a furnace chamber which penetrates through the feeding end and the discharging end, wherein the furnace chamber is provided with an air inlet arranged at the discharging end and an air outlet arranged at the feeding end;

the gas supply device is connected with the discharge end and communicated with the furnace chamber, and protective gas is input into the furnace chamber through the gas inlet;

the negative pressure generating device is connected with the feeding end and communicated with the furnace chamber, and the negative pressure generating device exhausts air to the furnace chamber through the air exhaust port so as to generate negative pressure in the furnace chamber and enable the protective gas to flow from the air inlet to the air exhaust port.

2. The anode material high-temperature sintering apparatus according to claim 1, wherein the gas supply device includes a first heater for heating the protective gas.

3. The anode material high-temperature sintering equipment according to claim 1, further comprising a filtering device and a heat tracing device, wherein the filtering device is connected with the feeding end and communicated with the furnace chamber through the exhaust port, and the heat tracing device is used for tracing the filtering device.

4. The anode material high-temperature sintering equipment according to claim 3, further comprising a pressure monitor, wherein the pressure monitor is arranged at the inlet and the outlet of the filter device.

5. The anode material high-temperature sintering equipment according to claim 1, further comprising a feeding pipeline connected with the feeding end and communicated with the furnace chamber, and a cooling assembly disposed on an exposed section of the feeding pipeline and used for cooling the feeding pipeline.

6. The anode material high-temperature sintering equipment according to claim 1, further comprising a sealing assembly, wherein the feeding end and the discharging end are both provided with the sealing assembly, the sealing assembly comprises a sleeve and a sealing filler arranged in the sleeve, an accommodating space is formed between the sleeve and the rotary furnace, the sealing filler is filled in the accommodating space, the sleeve is in sealing connection with the rotary furnace through the sealing filler, and the gas supply device further comprises a sealing gas pipeline, and the protective gas is input into the accommodating space through the sealing gas pipeline so as to form gas sealing between the sleeve and the rotary furnace.

7. The anode material high-temperature sintering equipment according to claim 6, wherein the gas supply device further comprises a second heater, and the second heater is arranged in the sealed gas transmission pipeline and used for heating the protective gas in the sealed gas transmission pipeline.

8. The anode material high-temperature sintering equipment according to any one of claims 1 to 7, further comprising a cooling tower connected with the discharge end to receive and cool the material discharged from the discharge end, wherein the gas supply device comprises a pressure control pipeline communicated with an internal cavity of the cooling tower, and the gas supply device inputs the protective gas to the internal cavity through the pressure control pipeline.

9. The anode material high-temperature sintering equipment according to any one of claims 1 to 7, further comprising an oxygen concentration detector connected to the feeding end and communicated with the furnace chamber through the exhaust port, wherein the oxygen concentration of the exhaust port is detected by the oxygen concentration detector.

10. The anode material high-temperature sintering equipment according to any one of claims 1 to 7, further comprising a housing, a medium supply device connected with the housing, and a medium output device connected with the housing, wherein the housing is arranged on the periphery of the rotary kiln and forms an annular cavity with the rotary kiln, a cooling medium is input into the annular cavity through the medium supply device, and the cooling medium is extracted from the annular cavity through the medium output device.