Powder material heat treatment device

Abstract

The invention discloses a powder material heat treatment device which comprises a treatment cavity with a feed port and a discharge port; the inclined partition plate is arranged at the bottom of the treatment cavity, the upper surface of the inclined partition plate is gradually inclined downwards from the feeding port to the discharging port, the inclined partition plate is provided with an upwards-through ventilation hole, and the inclined partition plate can block target powder; the gas supply device is used for supplying gas to the lower side of the inclined partition plate; and the cavity heating device is used for heating the cavity body of the processing cavity. The inclined partition plate is obliquely arranged from the feeding port to the discharging port, so that the inclined partition plate has a guiding function, powder automatically flows to the discharging port, continuous feeding and continuous discharging are facilitated, the treatment cavity does not need to be cooled, the treatment efficiency is improved, and meanwhile energy consumption is reduced. In conclusion, the heat treatment device for the powder material can effectively solve the problem that the heat treatment efficiency of the powder material is not high.

Description

Technical Field

[0001] The present invention relates to the technical field of powder material processing, and more specifically, to a heat treatment device for powder materials. Background Art

[0002] With the wide application of nanomaterials in the fields of energy, biomedicine, electronic information, etc., the quality requirements for nano powders are getting higher and higher. However, problems such as moisture, organic matter residue, particle agglomeration, and impure crystal phase often exist in the preparation, storage, etc. of nano powders, which seriously affect their performance and application effects. Traditional heat treatment equipment such as muffle furnaces has problems such as low automation degree and low production efficiency.

[0003] In summary, how to effectively solve the problem of low heat treatment efficiency of powder materials is an urgent problem that those skilled in the art need to solve at present. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a heat treatment device for powder materials, which can effectively solve the problem of low heat treatment efficiency of powder materials.

[0005] In order to achieve the above purpose, the present invention provides the following technical solutions:

[0006] A heat treatment device for powder materials, comprising:

[0007] A treatment chamber, having a feed port and a discharge port;

[0008] An inclined partition, arranged at the bottom of the treatment chamber, the upper surface of the inclined partition is gradually inclined downward from the feed port to the discharge port, the inclined partition has ventilation holes penetrating upward, and the inclined partition can block the target powder;

[0009] A gas supply device, used to supply gas to the lower side of the inclined partition;

[0010] A chamber heating device, used to heat the chamber of the treatment chamber.

[0011] In the above powder material heat treatment device, during use, powder materials are introduced from the feed port. The powder materials enter the upper side of the inclined partition plate. Under the action of gravity, since the inclined partition plate slopes downward, the powder materials will flow obliquely downward along the upper side of the inclined partition plate, that is, flow in the direction of the discharge port. During the flowing process, due to the heating of the cavity heating device, the corresponding heat treatment of the powder materials can be completed. And during the downward flowing process, due to the action of the air supply device, the heat treatment effect can be better. At the same time, the acting force of the air supply device on the powder materials, the gravity of the powder materials, and the supporting effect of the inclined partition plate can make the powder materials have more complex movements to better meet the needs of heat treatment. At the same time, the inclined partition plate also has a guiding effect to make the powder materials automatically flow to the discharge port, facilitating continuous feeding and continuous discharging, without waiting for the treatment cavity to cool down, improving the treatment efficiency while reducing energy consumption. In summary, the powder material heat treatment device can effectively solve the problem of low heat treatment efficiency of powder materials.

[0012] In some technical solutions, the air supply device includes a gas heating device and a plurality of jet nozzles. The plurality of jet nozzles are uniformly arranged on the lower side of the inclined partition plate and can all jet gas to the inclined partition plate; the plurality of jet nozzles are all communicated with the air outlet of the gas heating device, and at least two of the jet nozzles can independently control the gas flow rate through a gas flow controller respectively.

[0013] In some technical solutions, it includes partition partition plates. The plurality of partition partition plates are all arranged in the treatment cavity and are arranged in sequence from the feed port to the discharge port to respectively form treatment partitions; a gap for the powder materials to pass through is formed between the lower side of the partition partition plate and the inclined partition plate; at least two of the jet nozzles are respectively arranged corresponding to two of the treatment partitions and can independently control the gas flow rate through a gas flow controller respectively.

[0014] In some technical solutions, the air supply device further includes a blower for supplying air to the gas heating device; an air outlet is arranged at the top of the treatment cavity, and the air outlet is communicated with the air inlet of the gas heating device through a pipeline.

[0015] In some technical solutions, the cavity heating device includes a microwave heating device, an electromagnetic heating generator, and a plurality of electromagnetic heating spiral tubes connected to the electromagnetic heating generator; the plurality of electromagnetic heating spiral tubes are uniformly arranged around the treatment cavity; at least one of the treatment partitions is provided with a microwave heating device.

[0016] In some technical solutions, corresponding to each of the treatment partitions respectively, each of the jet nozzles can independently control the flow rate through a gas flow controller; the jet direction of each of the jet nozzles is adjustable with respect to the angle of the inclined partition plate.

[0017] In some technical solutions, a feeding hopper is provided at the feeding port, and the feeding hopper is arranged to slope downward. A pipeline arranged to slope downward communicates between the outlet of the feeding hopper and the feeding port; a receiving barrel is provided at the discharging port; and closing valves capable of being independently closed from each other are provided at both the feeding port and the discharging port.

[0018] In some technical solutions, a heat insulation layer is provided at the top of the processing chamber; the tops of all the partition baffles are connected to the heat insulation layer at the top, and the distances between the lower sides of all the partition baffles and the inclined baffle are equal.

[0019] In some technical solutions, at least three processing partitions are arranged in sequence from the feeding port to the discharging port, and they are in sequence: a first processing partition, a second processing partition, and a third processing partition;

[0020] At the first processing partition, the cavity heating device can be heated to 300 °C to 600 °C, and the gas supply device can supply 5 - 20 L / min of gas to the first processing partition to remove water and organic substances from the powder in the first processing partition;

[0021] At the second processing partition, the cavity heating device can be heated to 600 °C to 1000 °C, and the gas supply device can supply 10 - 40 L / min of gas to the second processing partition to adjust the crystal phase of the powder in the second processing partition;

[0022] At the third processing partition, the cavity heating device can be heated to 400 °C to 800 °C, and the gas supply device can supply 30 - 80 L / min of gas to the third processing partition to disperse the powder particles in the third processing partition.

[0023] In some technical solutions, the inclined baffle includes a filter screen part and refractory porous material layers arranged on the upper and lower sides of the filter screen part; the filter screen part includes multiple sintered metal filter screens stacked from top to bottom with gradually decreasing mesh numbers. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for describing the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0025] Figure 1 It is a schematic structural diagram of the powder material heat treatment device provided by the embodiment of the present invention;

[0026] Figure 2 Schematic diagram of the right partial sectional structure of the powder material heat treatment device provided by the embodiment of the present invention;

[0027] Figure 3 Schematic diagram of the matching structure of the inclined partition plate and the air jet head provided by the embodiment of the present invention.

[0028] The markings in the attached drawings are as follows:

[0029] Treatment chamber 1, inclined partition plate 2, gas heating device 3, air jet head 4, partition partition plate 5, blower 6, air outlet 7, electromagnetic heating generator 8, electromagnetic heating spiral tube 9, feeding hopper 10, receiving bucket 11, feed inlet 12, discharge outlet 13, heat insulation layer 14, air jet chamber 15;

[0030] First treatment partition 1-1, second treatment partition 1-2, third treatment partition 1-3;

[0031] Refractory porous material layer 2-1, first sintered metal filter screen 2-2, second sintered metal filter screen 2-3, third sintered metal filter screen 2-4.

[0032] The dotted part in the figure represents the hidden structure contour; the arrow indicates the gas flow direction. Detailed implementation manners

[0033] The embodiment of the present invention discloses a powder material heat treatment device to effectively solve the problem of low heat treatment efficiency of powder materials.

[0034] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0035] Please refer to Figures 1 - 3 , Figure 1 Schematic diagram of the structure of the powder material heat treatment device provided by the embodiment of the present invention; Figure 2 Schematic diagram of the right side structure of the powder material heat treatment device provided by the embodiment of the present invention; Figure 3 Schematic diagram of the matching structure of the inclined partition plate and the air jet head provided by the embodiment of the present invention.

[0036] In some embodiments, a powder material heat treatment device is provided, which can be, for example, a heat treatment device for improving the quality of nano-powder materials. The powder material heat treatment device mainly includes a treatment chamber 1, an inclined partition plate 2, a gas supply device, and a cavity heating device.

[0037] The processing chamber 1 has a feed inlet 12 and a discharge outlet 13, such that the powder material enters from the feed inlet 12, is processed in the processing chamber 1, and after the processing is completed, flows out from the discharge outlet 13. The processing in the processing chamber 1 can be water removal processing, organic matter removal processing, crystal phase adjustment processing, cluster fragmentation processing, etc. In the processing chamber 1, only one of the above-mentioned processes can be carried out, or multiple of the above-mentioned processes can be carried out simultaneously or sequentially.

[0038] The inclined partition plate 2 is arranged at the bottom of the processing chamber 1 and can serve as the bottom of the processing chamber 1. The inclined partition plate 2 can also be called an inclined baffle, and specifically, it can be a sintered metal inclined baffle. The upper surface of the inclined partition plate 2 is gradually inclined downward from the feed inlet 12 to the discharge outlet 13, so that after the powder material enters from the feed inlet 12, under the action of gravity, it moves along the inclined direction of the inclined partition plate 2 towards the discharge outlet 13, and then enters the discharge outlet 13. During the movement from the feed inlet 12 to the discharge outlet 13, the above-mentioned processing is carried out, so that when flowing out from the discharge outlet 13, the expected processing process is completed, such as independently completing water removal processing, organic matter removal processing, or crystal phase adjustment processing, etc., or sequentially completing water removal processing, organic matter removal processing, and crystal phase adjustment processing.

[0039] The inclined partition plate 2 can be a flat plate structure, as shown in the appendix Figure 1 From left to right, it is gradually inclined downward. At this time, the feed inlet 12 is arranged on the left side of the inclined partition plate 2, and the discharge outlet 13 is arranged on the right side of the inclined partition plate 2. Of course, the inclined partition plate 2 can also be in a funnel shape, with the center position inclined downward, and the four peripheral edges all form the feed inlet 12, and the center position forms the discharge outlet 13. The inclined partition plate 2 is inclined downward to lead the powder material entering from the feed inlet 12 towards the discharge outlet 13. Specifically, the inclination angle of the inclined partition plate 2 (the angle between the upper surface and the horizontal plane) can be between 5 degrees and 20 degrees, so as to better make the powdered material move towards the discharge outlet 13 under the combined action of gravity and the hot air flow design.

[0040] The inclined partition plate 2 has ventilation holes that penetrate upward, and the inclined partition plate 2 can block the target powder material. A gas supply device is arranged on the lower side of the inclined partition plate 2, so that the gas supplied by the gas supply device can pass upward through the ventilation holes on the inclined partition plate 2 to blow the powder material on the inclined partition plate 2 and / or take away the water vapor near the powder material. Of course, the ventilation holes should not be too large, and it should be not conducive to the powder material passing through the ventilation holes. The inclined partition plate 2 can have ventilation holes distributed in an array, like mesh holes; specifically, the aperture of the ventilation holes can be between 200 mesh and 500 mesh, specifically, it can be about 300 mesh.

[0041] Among them, the gas supply device is used to supply gas to the lower side of the inclined partition plate 2, and the cavity heating device is used to heat the cavity of the processing chamber 1. Through the heating of the processing chamber 1, the powder in the processing chamber 1 can be subjected to corresponding processing. The examples are as follows: when performing water removal and organic matter removal treatment, the temperature heated by the cavity heating device can be between 300 °C and 600 °C; for example, in the crystal phase adjustment treatment, the temperature heated by the cavity heating device can be between 600 °C and 1000 °C; for example, in the particle dispersion treatment, the temperature heated by the cavity heating device can be between 400 °C and 800 °C. This large temperature gradient zoning can realize the heat treatment of powders with different functions in different regions, and efficiently complete the treatment of multiple functions and multiple requirements such as water removal, organic matter removal, crystal phase adjustment, and cluster fragmentation. The gas supply device cooperates with the cavity heating device, and the generated hot air flow can drive the powder to move, forming a solid-gas movement and heat cycle, and / or carrying out impurities such as water vapor and organic matter contained in the powder, further improving the treatment effect of the device on the powder.

[0042] In the above powder material heat treatment device, during use, the powder is introduced from the feed port 12. The powder enters the upper side of the inclined partition plate 2. Under the action of gravity, because the inclined partition plate 2 is inclined downward, the powder will flow obliquely downward along the upper side of the inclined partition plate 2, that is, in the direction of the discharge port 13. During the flowing process, the corresponding heat treatment can be completed due to the heating of the cavity heating device. And during the downward flowing process, due to the action of the gas supply device, the heat treatment effect can be better. At the same time, the upward acting force of the gas supply device on the powder, the gravitational force of the powder, and the supporting force of the inclined partition plate 2 can make the powder have a more complex movement to better meet the needs of heat treatment. At the same time, the inclined partition plate 2 also has a guiding effect, so that the powder automatically flows to the discharge port 13, facilitating continuous feeding and continuous discharging, without waiting for the processing chamber 1 to cool down, improving the processing efficiency while reducing energy consumption. In summary, the powder material heat treatment device can effectively solve the problem of low heat treatment efficiency of powder materials.

[0043] In some embodiments, for example, the gas supply device can include a gas heating device 3 and a plurality of jet nozzles 4. The plurality of jet nozzles 4 are uniformly arranged on the lower side of the inclined partition plate 2 and can all jet gas into the inclined partition plate 2 and the processing chamber 1, so that the gas intake on the lower side of the inclined partition plate 2 is more uniform.

[0044] Among them, multiple jet heads 4 are all communicated with the air outlet 7 of the gas heating device 3 to be supplied with gas uniformly by the gas heating device 3. And at least two jet heads 4 can independently control the gas flow rate respectively through the gas flow controller, so that although the gas is supplied uniformly by the gas heating device 3, the jet gas flow rates of at least two jet heads 4 can be adjusted separately through the gas flow controller, so that the gas flow rate ejected by the jet head 4 can be changed to meet the specific processing requirements. The gas flow controller can be integrated in the jet head 4, or can be arranged between the jet head 4 and the air outlet 7 of the gas heating device 3. Regarding the arrangement mode of the gas flow controller: each jet head 4 can be correspondingly provided with a gas flow controller; or each jet head 4 corresponding to the same processing partition is communicated with the same gas flow controller to uniformly control the flow rate by the gas flow controller; specifically, other control modes can also be adopted. Specifically, a flow regulating ball valve can be provided at the jet head 4 at the end of the ventilation pipeline, so that the jet gas flow rate of each jet head 4 can be adjusted within the range of 5 - 80 L / min (liters per minute).

[0045] Through the control of the gas flow controller, the flow rate at the corresponding position can be adjusted according to needs to meet different heat treatment requirements and improve the overall adaptability.

[0046] In some embodiments, partition baffles 5 can be further provided. A plurality of partition baffles 5 are all arranged in the processing chamber 1, and the plurality of partition baffles 5 are arranged in sequence from the feed inlet 12 to the discharge outlet 13 to respectively form each processing partition. That is, from the feed inlet 12 to the discharge outlet 13, the processing chamber 1 is sequentially separated (not completely separated) to form a plurality of processing partitions, which can be used to complete different heat treatments. The partition baffle 5 can be arranged vertically, that is, perpendicular to the horizontal plane; of course, it can also be arranged slightly inclined relative to the horizontal plane.

[0047] A gap for the powder to pass through is formed between the lower side of the partition baffle 5 and the inclined baffle 2, such as not greater than the thickness of the inclined baffle, so that the powder can pass through. Generally speaking, the lower side surface of the partition baffle 5 is slightly higher than the upper side surface of the powder in the static state. Specifically, how much the gap is also needs to consider how much space is required during the heat treatment process of the powder and the properties of the powder itself such as fluidity and loose bulk density. More specifically, the optional range is 0.8 cm - 8 cm (centimeters). Because of the partition setting, different processing partitions are formed. On this basis, heat zoning and / or air volume zoning can be further realized. In order to better realize heat zoning, specifically, the partition baffle 5 can be made of a refractory heat-insulating material. And in order to better realize air volume zoning, different air volumes can be introduced into different processing partitions.

[0048] Within a heat partition, in order to further control the movement of the powder material, an air volume partition can be set up so that at least two jet nozzles 4 are respectively arranged corresponding to two of the treatment partitions, and the gas flow rate can be independently controlled by a gas flow controller respectively. So that there are at least two treatment partitions, such that the gas flow rates fed in through the inclined baffle 2 are different and can be correspondingly adjusted by the gas flow controller.

[0049] Specifically, each jet nozzle 4 corresponding to each treatment partition can independently control the flow rate through the gas flow controller. The optional setting of changing the cross-sectional area of the jet orifice of the jet nozzle 4 to change the gas flow velocity can be beneficial to increase the cluster breakage. In some embodiments, in order to better realize the gas supply, the gas supply device can further include a blower 6 for feeding air into the gas heating device 3.

[0050] In some embodiments, in order to avoid heat waste, an air outlet 7 can be provided at the top of the treatment chamber 1, and the air outlet 7 is communicated with the air inlet of the gas heating device 3 through a pipeline so that the heat can be recycled. In order to facilitate the recycling of the air at the air outlet 7, a blower can be provided between the air outlet 7 and the air inlet of the gas heating device 3. Of course, the air jet effect can also be utilized to entrain the gas at the air outlet 7.

[0051] Generally speaking, when multiple treatment partitions are provided, each treatment partition can be provided with an air outlet 7.

[0052] In some embodiments, the cavity heating device can include an electromagnetic heating generator 8 and a plurality of electromagnetic heating coils 9 connected to the electromagnetic heating generator 8. The plurality of electromagnetic heating coils 9 are uniformly arranged around the treatment chamber 1 to uniformly heat the treatment chamber 1 to increase the temperature of the treatment chamber 1. Specifically, the electromagnetic heating coils 9 can be arranged inside the cavity wall of the treatment chamber 1.

[0053] In some embodiments, in order to facilitate the control of the temperatures of different treatment partitions, at least two electromagnetic heating coils 9 can be respectively arranged corresponding to at least two of the treatment partitions, and the heating temperatures can be independently controlled respectively, so that the temperatures of the corresponding treatment partitions can be changed by adjusting the heating power of the electromagnetic heating coils 9 to meet the corresponding heat treatment temperature requirements. Each electromagnetic heating coil 9 corresponding to the same treatment partition can be adjusted by the same temperature control device.

[0054] It should be noted that the electromagnetic heating coil 9 corresponding to the processing partition, the jet head 4, etc. refer to that the main functional partition of the corresponding structure is the corresponding processing partition. For example, if most of the jets of the jet head 4 enter a certain processing partition, it is considered that the jet head 4 is correspondingly arranged with this processing partition; if the heat of the electromagnetic heating coil 9 mainly affects or is mainly transmitted to a certain processing partition, it is considered that the electromagnetic heating coil 9 is correspondingly arranged with this processing partition.

[0055] In some embodiments, in order to facilitate the control of the temperature of different processing partitions, the cavity heating device may include a microwave heating device. At least one of the processing partitions is provided with a microwave heating device. The temperature control under coupled heating can be achieved by increasing the activation of the microwave heating device and supplemented by monitoring with a numerical control thermocouple. As described later, microwave heating devices can be added only in the second processing partition 1-2 and the third processing partition 1-3. The heating powers of the electromagnetic heating coils 9 uniformly arranged around the processing chamber 1 are the same. Then, by turning on the microwave heating device, the temperatures of the second processing partition 1-2 and the third processing partition 1-3 can be made higher to meet the temperature requirements. Moreover, the heating speed of the microwave heating device is higher than that of the electromagnetic heating coil 9, so as to improve the usage efficiency.

[0056] Specifically, the cavity heating device can independently control the temperature of each processing partition so that the temperature of each processing partition meets the current processing requirements.

[0057] In some embodiments, the cavity heating device can adopt a single microwave heating device or an electromagnetic heating device.

[0058] In some embodiments, the jet direction of each jet head 4 can be adjustable relative to the angle of the inclined partition 2, so as to change the acting force direction on the powder by adjusting the jet angle of the jet head 4. If the inclination angle relative to the inclined partition 2 is too large, the blowing force on the powder will decrease. Similarly, in the direction from the feed port 12 to the discharge port 13, the acting force direction of the powder can also be changed by changing the jet direction of the jet head 4.

[0059] For example, for each jet head 4 corresponding to the same processing partition, in the direction from the feed port 12 to the discharge port 13, the jet head 4 is inclined away from the discharge port 13, and the inclination angle gradually increases, so that the acting force in the opposite direction to overcome the gravity of the powder gradually increases, so as to reduce the flow rate of the powder. After crossing the current processing partition and entering the next processing partition, the powder is blocked by the gradually increasing wind force again to avoid rapid flow. The final effect is that the powder can stay on the upper side part of the inclined partition 2 corresponding to each processing partition for a longer time to ensure the processing effect.

[0060] In some embodiments, the jet gas flow rate of each of the jet heads 4 can be increased or decreased by changing the cross-sectional area of the jet head, and through the coupling action with the above-mentioned jet head direction, jet flow rate, etc., different functions can be achieved, such as water removal, organic matter removal, high-speed shear fragmentation, etc.

[0061] Among them, the jet head 4 can be a ball-joint jet head 4, or it can be other jet heads 4 that can adjust the jet direction.

[0062] In some embodiments, for the convenience of feeding, preferably, a feeding hopper 10 is provided at the feed inlet 12 and is inclined downward. The outlet of the feeding hopper 10 is communicated with the feed inlet 12 through a pipe inclined downward to guide the powder to flow downward, so as to give the powder a downward movement trend to ensure that the powder flows on the inclined partition 2. A receiving bucket 11 can be provided at the discharge outlet 13 to facilitate receiving the powder.

[0063] In some embodiments, a closing valve capable of being independently closed can be provided at both the feed inlet 12 and the discharge outlet 13. Specifically, a first closing valve is provided at the feed inlet 12, and a second closing valve is provided at the discharge outlet 13, and the first closing valve and the second closing valve can be independently opened and closed. When the first closing valve and the second closing valve are in the closed state: when it is necessary to put in the powder, the first closing valve is opened, and when the feeding is completed, the first closing valve is closed; then when the powder in the treatment chamber 1 has completed the expected treatment process, the second closing valve is opened to gradually discharge the powder until the discharging is completed, and then the second closing valve is closed.

[0064] In some embodiments, the top of the treatment chamber 1 can have a heat insulation layer 14. Of course, heat insulation layers 14 can also be further provided on the peripheral side edges of the treatment chamber 1. The tops of the respective partition plates 5 are all connected to the top heat insulation layer 14, and the distances between the lower sides of the respective partition plates 5 and the inclined partition 2 are equal, so as to form treatment sub-chambers between adjacent partition plates 5.

[0065] In some embodiments, at least three treatment partitions can be arranged in sequence from the feed inlet 12 to the discharge outlet 13, and they are in sequence: the first treatment partition 1-1, the second treatment partition 1-2, and the third treatment partition 1-3. For example, a first partition plate and a second partition plate are provided to divide the treatment chamber 1 into the first treatment partition 1-1, the second treatment partition 1-2, and the third treatment partition 1-3 respectively.

[0066] At the first treatment partition 1-1, the cavity heating device can heat the first treatment partition 1-1 to 300 degrees Celsius to 600 degrees Celsius, and the gas supply device can supply 5-20 L / min (liters per minute) of gas to the first treatment partition 1-1 to remove water and organic matter from the powder in the first treatment partition 1-1.

[0067] At the second processing partition 1-2, the cavity heating device can heat the second processing partition 1-2 to 600 to 1000 degrees Celsius, and the gas supply device can supply 10-40 L / min (liters per minute) of gas to the second processing partition 1-2 for adjusting the crystal phase of the powder in the second processing partition 1-2. This is because the heat treatment temperature in the crystal phase adjustment section is usually relatively high, and it is easy to cause adhesion and agglomeration between particles. When the gas flow rate supplied here increases, it can better prevent the adhesion and agglomeration between particles. During use, the hot gas flow rate can be further adjusted according to the actual situation through the above gas flow controller to better promote the heat transfer between the powder and the gas flow, so as to simultaneously achieve better crystal phase adjustment and prevent agglomeration.

[0068] At the third processing partition 1-3, the cavity heating device can heat the third processing partition 1-3 to 400 to 800 degrees Celsius, and the gas supply device can supply 30-80 L / min (liters per minute) of gas to the third processing partition 1-3 for dispersing the powder particles in the third processing partition 1-3. The main purpose here is to use a large flow rate of hot gas flow to drive the nano powder to perform a spiral-like cyclic motion to promote further dispersion and depolymerization of the powder and breakage of clusters.

[0069] The powder processed at the third processing partition 1-3 can be further discharged from the discharge port 13 under the guidance of the inclined partition 2 and the action of gravity, and enter the sealed receiving barrel 11 through a hose connection.

[0070] In some embodiments, in order to conveniently introduce gas and prevent the powder from falling. The inclined partition 2 can include a filter screen part and refractory porous material layers 2-1 arranged on the upper and lower sides of the filter screen part. Among them, the filter screen part includes multiple layers of sintered metal filter screens stacked from top to bottom with gradually decreasing mesh numbers, such as at least three layers of sintered metal filter screens can be provided. Specifically, from top to bottom, there are a first sintered metal filter screen 2-2, a second sintered metal filter screen 2-3, and a third sintered metal filter screen 2-4 in sequence, and the mesh numbers of the first sintered metal filter screen 2-2, the second sintered metal filter screen 2-3, and the third sintered metal filter screen 2-4 gradually decrease. For example, the first sintered metal filter screen 2-2 can be about 2000 mesh, the mesh number of the second sintered metal filter screen 2-3 can be about 1200 mesh, and the mesh number of the third sintered metal filter screen 2-4 can be about 300 mesh.

[0071] In some embodiments, a sintering furnace body may be provided. An inclined partition 2 is provided in the middle and lower part of the furnace cavity of the sintering furnace body, so that the part of the furnace cavity above the inclined partition 2 constitutes a processing chamber 1, and the part below constitutes a jet chamber 15. Each jet head 4 is arranged in the jet chamber 15, and a vertically arranged air pipe correspondingly supports the corresponding jet head 4. A heat insulation layer 14 is provided on the furnace body, and the electromagnetic heating spiral tube 9 can extend downward into the jet chamber.

[0072] In some embodiments, such as some of the powder material heat treatment devices provided above, by combining methods such as spouted circulation airflow, numerical control multi-temperature zones, local large temperature gradients, and high-speed airflow shear fragmentation, the advantages of efficient gas-solid contact heat transfer, multi-zone active regulation, and simple and reliable structure can be fully utilized to realize quality improvement processes such as drying, purification, crystal phase adjustment, and cluster fragmentation of nano powders. At the same time, by setting the inclined partition 2 and the vertical partition 5 to control the solid and gas circulation movements and their areas, continuous feeding and discharging are realized through the feeding and discharging ports 13 to reduce heat loss and cooling time. Under the condition of linkage control of the powder material heat treatment device, continuous and stable post-treatment of a large number of nano powder materials is realized, improving the quality and production efficiency of nano powders.

[0073] The various embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. The same or similar parts among the various embodiments can be referred to each other.

[0074] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A powder material heat treatment device, characterized in that: include: A processing chamber (1) having a feed inlet (12) and a discharge outlet (13); An inclined partition (2) is arranged at the bottom of the processing chamber (1), the upper surface of the inclined partition (2) being gradually inclined downward from the feed inlet (12) to the discharge outlet (13), the inclined partition (2) having a ventilation hole penetrating upward, and the inclined partition (2) is capable of blocking target powder; A gas supply device, used for supplying gas to the lower side of the inclined partition plate (2); A cavity heating device is used to heat the cavity of the processing cavity (1).

2. The powder material heat treatment device according to claim 1, characterized in that: The gas supply device comprises a gas heating device (3) and a plurality of gas jets (4); the plurality of gas jets (4) are evenly arranged on the lower side of the inclined partition (2) and are capable of jetting gas toward the inclined partition (2) and into the processing chamber (1); the plurality of gas jets (4) are all connected to a gas outlet (7) of the gas heating device (3), and at least two of the gas jets (4) are capable of independently controlling the gas flow rate through a gas flow controller.

3. The powder material heat treatment device according to claim 2, characterized in that: The invention comprises partition baffles (5), wherein a plurality of the partition baffles (5) are arranged in the processing chamber (1) and are arranged in sequence from the feed inlet (12) to the discharge outlet (13) to form processing partitions respectively; a gap for powder to pass through is formed between the lower side of the partition baffles (5) and the inclined baffles (2); and at least two of the air jet heads (4) are respectively arranged corresponding to two of the processing partitions, and the gas flow can be independently controlled by a gas flow controller.

4. The powder material heat treatment device according to claim 3, characterized in that: The air supply device further comprises a blower (6) for supplying air to the gas heating device (3); an air outlet (7) is provided at the top of the processing chamber (1), and the air outlet (7) is connected to the air inlet of the gas heating device (3) through a pipeline.

5. The powder material heat treatment device according to claim 3, characterized in that: The cavity heating device comprises a microwave heating device, an electromagnetic heating generator (8) and a plurality of electromagnetic heating spiral tubes (9) connected to the electromagnetic heating generator (8); the plurality of electromagnetic heating spiral tubes (9) are evenly arranged around the processing cavity (1); and at least one of the processing partitions is provided with a microwave heating device.

6. The powder material heat treatment device according to claim 5, characterized in that: Each of the nozzles (4) corresponding to each of the processing partitions can independently control the flow rate through a gas flow controller; the nozzle direction of each of the nozzles (4) is adjustable relative to the inclined partition (2).

7. The powder material heat treatment device according to claim 5, characterized in that: The feed port (12) is provided with a hopper (10) arranged obliquely downward, and the outlet of the hopper (10) is connected to the feed port (12) via a pipe arranged obliquely downward; the discharge port (13) is provided with a receiving barrel (11); the feed port (12) and the discharge port (13) are both provided with closing valves that can be closed independently of each other.

8. The powder material heat treatment device according to claim 5, characterized in that: The top of the processing chamber (1) is provided with a heat insulating layer (14); the top of each partition partition (5) is connected to the heat insulating layer (14) at the top, and the distance between the lower side of each partition partition (5) and the inclined partition (2) is equal.

9. The powder material heat treatment device according to claim 3, characterized in that: At least three processing zones are arranged in sequence from the feed port (12) to the discharge port (13), and are: a first processing zone (1-1), a second processing zone (1-2), and a third processing zone (1-3); At the first processing zone (1-1), the cavity heating device can heat to 300 degrees Celsius to 600 degrees Celsius, and the gas supply device can supply 5-20L / min of gas to the first processing zone (1-1) to remove water and organic matter from the powder in the first processing zone (1-1); At the second processing partition (1-2), the chamber heating device can heat to 600 degrees Celsius to 1000 degrees Celsius, and the gas supply device can supply 10-40L / min of gas to the second processing partition (1-2) to adjust the crystal phase of the powder in the second processing partition (1-2); At the third processing zone (1-3), the cavity heating device can heat to 400 degrees Celsius to 800 degrees Celsius, and the gas supply device can supply 30-80L / min of gas to the third processing zone (1-3) to disperse the powder particles in the third processing zone (1-3).

10. The powder material heat treatment device according to any one of claims 1 to 9, characterized in that: The inclined partition plate (2) comprises a filter screen portion and refractory porous material layers (2-1) arranged on upper and lower sides of the filter screen portion; the filter screen portion comprises multiple layers of sintered metal filter screens stacked from top to bottom and with gradually decreasing mesh sizes.

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