A heat treatment device for powder materials

Abstract

The present invention discloses a heat treatment device for powder materials, comprising: a processing chamber having a feed inlet and a discharge outlet; an inclined partition disposed at the bottom of the processing chamber, the upper surface of the inclined partition being gradually inclined downward from the feed inlet to the discharge outlet, the inclined partition having ventilation holes penetrating upward, and the inclined partition being capable of blocking the target powder; a gas supply device for supplying gas to the lower side of the inclined partition; and a chamber heating device for heating the chamber of the processing chamber. Since the inclined partition is inclined from the feed inlet to the discharge outlet, it has a guiding effect, enabling the powder to automatically flow to the discharge outlet, facilitating continuous feeding and continuous discharging, without waiting for the processing chamber to cool down, improving the processing efficiency while reducing energy consumption. In summary, the heat treatment device for powder materials can effectively solve the problem of low heat treatment efficiency of powder materials.

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, nano powders often have problems such as moisture, organic residue, particle agglomeration, and impure crystal phase during the preparation and storage processes, 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 for those skilled in the art 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 processing chamber, having a feed port and a discharge port;

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

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

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

[0011] In the above powder material heat treatment device, during use, powder is introduced from the feed port. The powder enters the upper side of the inclined partition. Under the action of gravity, since the inclined partition slopes downward, the powder will flow obliquely downward along the upper side of the inclined partition, 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 can be completed. And during the downward flowing process, due to the action of the air supply device, the heat treatment effect is better. At the same time, the acting force of the air supply device on the powder, the gravity of the powder, and the supporting effect of the inclined partition can make the powder have a more complex movement to better meet the needs of heat treatment. At the same time, the inclined partition also has a guiding effect, so that the powder automatically flows to the discharge port, which is convenient for 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 evenly arranged on the lower side of the inclined partition and can all jet gas to the inclined partition; 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 partitions. The plurality of partition partitions 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 to pass through is formed between the lower side of the partition partition and the inclined partition; 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 body 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 coils connected to the electromagnetic heating generator; the plurality of electromagnetic heating coils are evenly 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.

[0017] In some technical solutions, a feeding hopper is provided at the feeding port, and the feeding hopper is arranged to incline downward. A pipeline arranged to incline downward is connected between the outlet of the feeding hopper and the feeding port; a receiving barrel is provided at the discharging port; closing valves that can be 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 degrees Celsius to 600 degrees Celsius, 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 degrees Celsius to 1000 degrees Celsius, 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 degrees Celsius to 800 degrees Celsius, 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 layers of 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 use in the description of 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, other drawings can be obtained based on these drawings without creative efforts.

[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 cooperation structure of the inclined partition plate and the air jet head provided by the embodiment of the present invention.

[0028] The labels in the drawings are as follows:

[0029] Processing 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, feeding port 12, discharging port 13, heat insulation layer 14, air jet chamber 15;

[0030] First processing partition 1-1, second processing partition 1-2, third processing 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 represents 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 cooperation 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 processing chamber 1, an inclined partition plate 2, a gas supply device, and a cavity heating device.

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

[0038] Among them, 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. Among them, the inclined partition plate 2 can also be called an inclined baffle, 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 treatment, organic matter removal treatment or crystal phase adjustment treatment, etc., or sequentially completing water removal treatment, organic matter removal treatment and crystal phase adjustment treatment.

[0039] Among them, the inclined partition plate 2 can be a flat plate structure, as shown in the attachment Figure 1 As shown, it is gradually inclined downward from left to right. 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 to better make the powdery material move towards the discharge outlet 13 under the coupled action of gravity and hot air flow design.

[0040] Among them, the inclined partition plate 2 has ventilation holes penetrating 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 should not be 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. 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 degrees Celsius and 600 degrees Celsius; for example, in the crystal phase adjustment treatment, the temperature heated by the cavity heating device can be between 600 degrees Celsius and 1000 degrees Celsius; for example, in the particle dispersion treatment, the temperature heated by the cavity heating device can be between 400 degrees Celsius and 800 degrees Celsius. This large temperature gradient zoning can achieve powder heat treatment with different functions in different regions, efficiently complete various functions and requirements such as water removal, organic matter removal, crystal phase adjustment, and cluster breaking. 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 processing effect of the device on the powder.

[0042] In the above-mentioned 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 downward along the upper side of the inclined partition plate 2, that is, in the direction of the discharge port 13. During the flow process, corresponding heat treatment can be completed due to the heating of the cavity heating device. And during the downward flow process, due to the action of the gas supply device, the heat treatment effect is better. At the same time, the upward acting force of the gas supply device on the powder, the gravity of the powder, and the supporting action of the inclined partition plate 2 can make the powder have more complex movements 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 connected to the air outlet 7 of the gas heating device 3 to be supplied with gas uniformly by the gas heating device 3. At least two jet heads 4 can independently control the gas flow rate respectively through a 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 specific processing requirements. The gas flow controller can be integrated in the jet head 4, or a gas flow controller can be arranged between the jet head 4 and the air outlet 7 of the gas heating device 3. Regarding the arrangement method of the gas flow controller: a gas flow controller can be correspondingly arranged for each jet head 4; or each jet head 4 corresponding to the same processing partition is connected to the same gas flow controller to uniformly control the flow rate by the gas flow controller; specifically, other control methods 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 of the powder. 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 packing 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. 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 partition 2 are different and can be correspondingly adjusted by the gas flow controller.

[0049] Specifically, each of the jet nozzles 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 nozzle of the jet nozzle 4 to change the gas flow velocity can be beneficial to increase the fragmentation of clusters. In some embodiments, in order to better supply gas, 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 recovery of the air body 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 temperature 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 temperature can be independently controlled respectively, so that the temperature of the corresponding treatment partition can be changed by adjusting the heating power of the electromagnetic heating coils 9 to meet the corresponding heat treatment temperature requirements. Each of the electromagnetic heating coils 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 function 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 regarded 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 transferred to a certain processing partition, it is regarded 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, the microwave heating device 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 evenly arranged around the processing cavity 1 are the same. Then, by adding the activation of 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 use 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 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 coupling actions 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 shearing and crushing, 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 disposed at the feeding port 12 in a downwardly inclined manner, and a pipe disposed in a downwardly inclined manner is connected between the outlet of the feeding hopper 10 and the feeding port 12 to guide the powder material to flow downward, so as to give the powder material a downward movement tendency to ensure that the powder material flows on the inclined partition plate 2. A receiving bucket 11 can be disposed at the discharging port 13 to facilitate receiving the powder material.

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

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

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

[0066] At the first processing partition 1-1, the cavity heating device can heat the first processing 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 processing partition 1-1 to be used for removing water and organic matter from the powder material in the first processing partition 1-1.

[0067] At the second processing zone 1-2, the cavity heating device can heat the second processing zone 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 zone 1-2 for adjusting the crystal phase of the powder in the second processing zone 1-2. This is because the heat treatment temperature in the crystal phase adjustment section is usually relatively high, which is prone to particle adhesion, agglomeration, etc. By increasing the gas flow rate supplied here, it is possible to better prevent particle adhesion, agglomeration, etc. 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 good crystal phase adjustment and prevent agglomeration.

[0068] At the third processing zone 1-3, the cavity heating device can heat the third processing zone 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 zone 1-3 for dispersing the powder particles in the third processing zone 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, promoting further dispersion and depolymerization of the powder and breaking of clusters.

[0069] The powder processed in the third processing zone 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. The filter screen part includes multiple layers of sintered metal filters stacked from top to bottom with gradually decreasing mesh numbers, such as at least three layers of sintered metal filters can be provided. Specifically, from top to bottom, a first sintered metal filter 2-2, a second sintered metal filter 2-3, and a third sintered metal filter 2-4 are arranged in sequence, and the mesh numbers of the first sintered metal filter 2-2, the second sintered metal filter 2-3, and the third sintered metal filter 2-4 gradually decrease. For example, the first sintered metal filter 2-2 can be about 2000 mesh, the mesh number of the second sintered metal filter 2-3 can be about 1200 mesh, and the mesh number of the third sintered metal filter 2-4 can be about 300 mesh.

[0071] In some embodiments, a sintering furnace body may be provided. An inclined partition plate 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 plate 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. An insulating layer 14 is provided on the furnace body, and the electromagnetic heating coil 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 circulating airflow, numerically controlled 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 achieve 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 plate 2 and the vertical partition plate 5 to control the solid and gas circulation movements and their regions, 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. For the same or similar parts among the various embodiments, reference can be made 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 the embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

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

2. The powder material heat treatment device according to claim 1, wherein The gas supply device includes a gas heating device (3) and a plurality of jet nozzles (4), the plurality of jet nozzles (4) being uniformly arranged on the lower side of the inclined partition plate (2) and all capable of jetting gas to the inclined partition plate (2) and entering the processing chamber (1); the plurality of jet nozzles (4) are all connected to the gas outlet (7) of the gas heating device (3), and at least two of the jet nozzles (4) can independently control the gas flow rate through a gas flow controller respectively.

3. The powder material heat treatment device according to claim 2, characterized in that, Including partition partition plates (5), the plurality of partition partition plates (5) are all disposed 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 the powder to pass through is formed between the lower side of the partition partition plate (5) and the inclined partition plate (2); at least two of the jet nozzles (4) are respectively corresponding to two of the processing partitions and can independently control the gas flow rate through a gas flow controller respectively.

4. The powder material heat treatment device according to claim 3, characterized in that, The gas supply device further includes 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 communicated with 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 chamber heating device includes a microwave heating device, 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 processing chamber (1); 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 Corresponding to each of the processing partitions respectively, each of the jet nozzles (4) can independently control the flow rate through a gas flow controller; the jetting direction of each of the jet nozzles (4) is adjustable with respect to the angle of the inclined partition plate (2).

7. The heat treatment apparatus for powder materials according to claim 5, characterized in that, The feed inlet (12) is provided with a downwardly inclined feeding hopper (10), and the outlet of the feeding hopper (10) is communicated with the feed inlet (12) through a downwardly inclined pipeline; the discharge outlet (13) is provided with a receiving barrel (11); the feed inlet (12) and the discharge outlet (13) are both provided with closing valves that can be independently closed from each other.

8. The heat treatment apparatus for powder materials according to claim 5, characterized in that, The top of the processing chamber (1) has a heat insulation layer (14); the tops of the respective partition partition plates (5) are all connected to the heat insulation layer (14) at the top, and the distance between the lower side of each of the partition partition plates (5) and the inclined partition plate (2) is equal.

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

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

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