Device for preparing spherical oxide powder by controlled combustion method

Abstract

The utility model provides a device for preparing spherical oxide powder by a controlled combustion method, which comprises a reaction cavity configured to be used for combusting solid silicon particles to obtain silicon oxide liquid drops; the batching mechanism comprises a powder channel, a gas supply pipeline and a batching cavity; the conveying mechanism is configured to be connected with the batching mechanism and the reaction cavity, the conveying mechanism comprises at least three raw material input channels, a second flow control valve is arranged in each raw material input channel, and an angle adjusting assembly is arranged between each raw material input channel and the reaction cavity; the angle adjusting assembly is configured to adjust the angle of raw materials entering the reaction cavity in the raw material input channel; the bottom of the cooling mechanism is connected with the powder collecting mechanism. The device disclosed by the utility model can be used for preparing silicon dioxide particles with various diameters.

Description

Technical Field

[0001] This application relates to the field of powder processing equipment technology, and in particular to an apparatus for preparing spherical oxide powder by controlled combustion method. Background Technology

[0002] Spherical silica powder is widely used in high-end integrated circuit packaging due to its superior properties such as high heat resistance, high moisture resistance, high corrosion resistance, high filling capacity, low dielectric constant, low expansion, low stress, low impurities, and low coefficient of friction. With the rapid development of the microelectronics industry, the integration density of large-scale integrated circuits is increasing, and the requirements for the particle size, purity, and sphericity of silica powder in epoxy molding compounds are also becoming more stringent.

[0003] In the field of materials preparation, combustion is a commonly used method for preparing spherical silica powder. It mainly utilizes the combustion of solid raw materials under specific conditions to generate a high-temperature reaction, transforming the raw materials into a droplet state. Subsequently, through cooling and other processes, solid spherical powder is formed. This method has advantages such as high efficiency and the ability to be mass-produced, and it has wide applications in many industries such as electronics, ceramics, and chemicals.

[0004] However, existing combustion methods have some problems that urgently need to be solved during the preparation process. One particularly prominent issue is that, during the reaction to generate silica droplets, the complexity of the reaction environment and the imprecision of material transport and mixing often lead to two or more collisions among the droplets. When droplets collide, they may merge or change their trajectory, thus affecting the morphology and size of the final oxide powder. Summary of the Invention

[0005] In view of this, the present application provides an apparatus for preparing spherical oxide powder by controlled combustion to solve at least one problem existing in the prior art, comprising,

[0006] The reaction chamber is configured to allow solid silicon particles to be burned to obtain silicon oxide droplets;

[0007] The batching mechanism includes a powder channel, a gas supply pipeline, and a batching chamber. The gas supply pipeline is configured to introduce combustible gas and combustion-supporting gas into the batching chamber. A first flow control valve and a flow meter are installed in the gas supply pipeline.

[0008] A conveying mechanism is configured to connect the dispensing mechanism and the reaction chamber. The conveying mechanism includes at least three raw material input channels. Each raw material input channel is provided with a second flow control valve. An angle adjustment component is provided between each raw material input channel and the reaction chamber. The angle adjustment component is configured to adjust the angle at which the raw material in the raw material input channel enters the reaction chamber.

[0009] The cooling mechanism is configured to automatically spheroidize silica droplets in a suspended state and cool them to form solid spherical silica powder.

[0010] A powder collection mechanism is connected to the bottom of the cooling mechanism, and the powder collection mechanism is configured to separate powder and gas.

[0011] Optionally, the angle adjustment assembly includes a guide bracket and a drive motor. The drive motor is fixedly installed in the reaction chamber, and the guide bracket is fixedly installed at the output end of the drive motor. The guide bracket is provided with a receiving portion to accommodate the raw material input channel, and one end of the raw material input channel near the reaction chamber is placed in the receiving portion.

[0012] Optionally, the side wall of the reaction chamber is provided with a dispersion gas inlet for inputting inert gas, and the dispersion gas inlet is provided with an adjustment device.

[0013] Optionally, the regulating device includes a pressure controller and a flow controller.

[0014] Optionally, the powder collection mechanism includes a cyclone separator, the outlet of which is connected to a membrane classifier, which is connected to a collection chamber.

[0015] Optionally, the powder collection mechanism may also include an exhaust gas treatment component.

[0016] Optionally, the cooling mechanism includes a cooling chamber that communicates with the reaction chamber. The side wall of the cooling chamber has a cavity, and a cooling pipe is disposed inside the cavity.

[0017] Optionally, the cooling pipes are arranged in a spiral pattern.

[0018] Optionally, an ignition assembly is also provided inside the reaction chamber.

[0019] Optionally, a gate is provided between the reaction chamber and the raw material input channel.

[0020] The beneficial effects of this application are as follows:

[0021] This invention, through a cleverly designed conveying mechanism, allows for the increase or decrease of the number of raw material input channels, effectively controlling the number of collisions between oxide droplets formed after the combustion of metal powder with oxygen. In actual production, operators can flexibly adjust the number of raw material input channels according to the required particle size distribution of the powder. For example, when a finer particle size distribution is required, reducing the number of raw material input channels lowers the probability of droplet collisions, allowing the droplets to form smaller, more uniformly sized powder particles after cooling. Conversely, if a wider particle size range is required, appropriately increasing the number of raw material input channels provides more opportunities for droplet collisions, thereby forming powder particles of different sizes and greatly improving product adaptability and production flexibility.

[0022] This invention discloses a controlled combustion method for preparing spherical oxide powder. By adjusting the gas input, the device significantly improves the dispersion of droplets, thereby effectively reducing the probability of secondary collisions. Furthermore, by adjusting the system pressure and cooling rate, the number of collisions of different droplets before solidification can be precisely controlled. In practice, increasing the system pressure reduces the distance between droplets, increasing the collision probability; conversely, appropriately reducing the system pressure increases the droplet distance, reducing collisions. Simultaneously, controlling the cooling rate effectively allows for rapid solidification, reducing collision opportunities; conversely, a slower cooling rate allows droplets more time to interact. Through the coordinated adjustment of these multiple factors, precise control over droplet collisions and the final powder particle size can be achieved.

[0023] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0024] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0025] Figure 1 This is a schematic diagram of the structure of this utility model;

[0026] Figure 2 This is a schematic diagram of the material dispensing mechanism of this utility model;

[0027] Figure 3 This is a cross-sectional view of area A of this utility model;

[0028] Figure 4 This is a schematic diagram of the structure of the practical angle adjustment component;

[0029] Figure label:

[0030] 1. Reaction chamber; 2. Batching mechanism; 21. Powder channel; 22. Gas supply pipeline; 23. Batching chamber; 24. First flow control valve; 25. Flow meter; 3. Conveying mechanism; 31. Raw material input channel; 311. Second flow control valve; 4. Cooling mechanism; 41. Cooling chamber; 42. Cooling pipe; 5. Powder collection mechanism; 51. Cyclone separator; 52. Filter membrane classifier; 53. Collection bin; 54. Tail gas treatment assembly; 6. Angle adjustment assembly; 61. Support; 62. Drive motor; 63. Receptacle; 7. Dispersing gas inlet; 71. Adjustment device; 8. Gate; 9. Ignition assembly. Detailed Implementation

[0031] Exemplary embodiments of the present application will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present application are shown in the drawings, it should be understood that the present application may be implemented in various forms and should not be limited to the specific embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present application and to fully convey the scope of the disclosure of the present application to those skilled in the art.

[0032] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of this application. However, it will be apparent to those skilled in the art that this application can be practiced without one or more of these details. In other instances, to avoid confusion with this application, some technical features well-known in the art have not been described; that is, not all features of actual embodiments are described herein, nor are well-known functions and structures described in detail.

[0033] In the accompanying drawings, for clarity, the dimensions of layers, areas, and elements, as well as their relative dimensions, may be exaggerated. The same reference numerals denote the same elements throughout.

[0034] It should be understood that when an element or layer is referred to as "on," "adjacent to," "connected to," or "coupled to" other elements or layers, it may be directly on, adjacent to, connected to, or coupled to other elements or layers, or there may be intervening elements or layers. Conversely, when an element is referred to as "directly on," "directly adjacent to," "directly connected to," or "directly coupled to" other elements or layers, there are no intervening elements or layers. It should be understood that although the terms first, second, third, etc., may be used to describe various elements, components, areas, layers, and / or portions, these elements, components, areas, layers, and / or portions should not be limited by these terms. These terms are only used to distinguish one element, component, area, layer, or portion from another element, component, area, layer, or portion. Therefore, without departing from the teachings of this application, the first element, component, area, layer, or portion discussed below may be referred to as a second element, component, area, layer, or portion. And the discussion of a second element, component, area, layer, or portion does not imply that the first element, component, area, layer, or portion necessarily exists in this application.

[0035] Spatial relation terms such as “below,” “under,” “below,” “under,” “above,” “above,” etc., are used herein for convenience of description to describe the relationship between one element or feature shown in the figure and other elements or features. It should be understood that, in addition to the orientation shown in the figure, spatial relation terms are intended to also include different orientations of the device in use and operation. For example, if the device in the figure is flipped, then the element or feature described as “below,” “under,” or “below” other elements or features will be oriented “above” other elements or features. Therefore, the exemplary terms “below” and “under” can include both above and below orientations. The device may be otherwise oriented (rotated 90 degrees or otherwise) and the spatial descriptive terms used herein will be interpreted accordingly.

[0036] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of this application. When used herein, the singular forms “a,” “an,” and “the” are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising” and / or “including,” when used in this specification, identify the presence of the stated features, integers, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups. When used herein, the term “and / or” includes any and all combinations of the associated listed items.

[0037] To fully understand this application, detailed steps and structures will be presented in the following description to illustrate the technical solution of this application. Preferred embodiments of this application are described in detail below; however, in addition to these detailed descriptions, this application may have other implementation methods.

[0038] This invention relates to an apparatus for preparing spherical oxide powder by controlled combustion. The specific embodiments of the apparatus will be described in detail below so that those skilled in the art can clearly understand and implement the invention.

[0039] like Figures 1 to 4 As shown, including,

[0040] Reaction chamber 1 is configured to allow solid silicon particles to be burned to obtain silicon oxide droplets;

[0041] The batching mechanism 2 includes a powder channel 21, a gas supply pipe 22, and a batching chamber 23. The gas supply pipe is configured to introduce combustible gas and combustion-supporting gas into the batching chamber. A first flow control valve 24 and a flow meter 25 are installed in the gas supply pipe. The powder channel can feed a set weight of silicon particles into the batching chamber and adjust the amount of combustible gas and combustion-supporting gas according to the amount of silicon particles.

[0042] The conveying mechanism 3 is configured to connect the batching mechanism and the reaction chamber. The conveying mechanism includes at least three raw material input channels 31. The appropriate position of the raw material input channel is selected to open according to the required diameter of the silica particles to be formed and the amount of raw material introduced. At the same time, the flow rate of the mixed gas in the raw material input channel into the reaction chamber is controlled. This is to increase or decrease the number of two or more collisions of droplets by controlling the amount of raw material input and the channel angle, thereby obtaining silica particles of different particle sizes. Each raw material input channel is provided with a second flow control valve 311. An angle adjustment component 6 is provided between each raw material input channel and the reaction chamber. The angle adjustment component is configured to adjust the angle at which the raw material in the raw material input channel enters the reaction chamber.

[0043] Cooling mechanism 4 is configured to automatically spheroidize silica droplets in a suspended state and cool them to form solid spherical silica powder. The silica droplets generated in the reaction chamber, along with the inert gas, unreacted combustible gas and combustion-supporting gas in the reaction chamber, and the gas generated in the reaction, enter the cooling mechanism together and are cooled in the cooling mechanism to solidify the silica droplets into spherical particles.

[0044] Powder collection mechanism 5 is connected to the bottom of the cooling mechanism. The powder collection mechanism is configured to separate powder and gas. The powder collection mechanism is used to collect the prepared silica particles.

[0045] Furthermore, the angle adjustment assembly includes a guide bracket 61 and a drive motor 62. The drive motor is fixedly mounted in the reaction chamber, and the side wall of the guide bracket is fixedly mounted to the output end of the drive motor. The guide bracket is provided with a receiving portion 63 to accommodate the raw material input channel, with one end of the raw material input channel near the reaction chamber placed within the receiving portion. The rotation of the guide bracket is caused by the movement of the drive motor, thereby changing the angle between the raw material input channel and the reaction chamber, and thus changing the angle at which the gas mixed with silicon particles in the raw material input channel enters the reaction chamber.

[0046] Furthermore, the side wall of the reaction chamber is provided with a dispersion gas inlet 7, which is used to input inert gas. The dispersion gas inlet is equipped with an adjustment device 71. The dispersion gas inlet on the side wall of the reaction chamber adopts a special flared design, which allows the input inert gas to diffuse more evenly into the reaction chamber. By adjusting the pressure in the reaction chamber, the number of collisions of different droplets before cooling and solidification can be controlled.

[0047] Furthermore, the regulating device includes a pressure controller and a flow controller. The pressure controller employs a high-precision pressure sensor and an intelligent control chip, enabling it to monitor the pressure within the reaction chamber in real time and automatically adjust the gas input according to a set value to maintain pressure stability. The flow controller precisely controls the gas flow rate through a high-precision flow sensor and an electric regulating valve.

[0048] Furthermore, the powder collection mechanism includes a cyclone separator 51, the outlet of which is connected to a membrane classifier 52, which is connected to a collection chamber 53. Under the suction of a centrifugal fan, the formed spherical silica powder passes through the cyclone separator to remove a small amount of larger particles, and is further drawn into the membrane classifier, which can separate silica powder of different particle sizes as required.

[0049] Furthermore, the powder collection mechanism is also equipped with an exhaust gas treatment component 54. The exhaust gas treatment component includes a harmful gas purification unit and a particulate matter filtration unit. The gas discharged from the powder collection mechanism passes through the particulate matter filtration unit and the gas purification unit in sequence, and is finally discharged from the gas purification unit.

[0050] Furthermore, the cooling mechanism includes a cooling chamber 41, one end of which is connected to the reaction chamber and the other end to the powder collection mechanism. A cavity is formed in the side wall of the cooling chamber, and a cooling pipe 42 is disposed within the cavity. The side wall of the cooling chamber is hollow, and the cooling pipe is disposed within the hollow structure. The cooling pipe is filled with coolant and is connected to an external coolant circulation mechanism, which facilitates the circulation of coolant within the cooling pipe.

[0051] Furthermore, the cooling pipes are arranged in a spiral pattern. This spiral design helps increase the contact area with the cooling chamber, thereby improving the cooling effect.

[0052] Furthermore, the reaction chamber is also equipped with an ignition component 9. The silicon particles in the reaction chamber are ignited by the ignition component, causing them to transform into silicon dioxide droplets.

[0053] Furthermore, a gate 8 is provided between the reaction chamber and the raw material input channel. The gate controls the opening and closing state of the raw material input channel. When the batching mechanism conveys gas carrying silicon particles into the reaction chamber via the conveying mechanism, controlling the number and position of the open raw material input channel effectively controls the number of collisions of oxide droplets formed after the metal powder and oxygen combustion.

[0054] It should be understood that the above embodiments are exemplary and are not intended to encompass all possible implementations included in the claims. Various modifications and changes can be made to the above embodiments without departing from the scope of this disclosure. Similarly, the various technical features of the above embodiments can be arbitrarily combined to form other embodiments of this application that may not be explicitly described. Therefore, the above embodiments only illustrate several implementations of this application and do not limit the scope of protection of this patent application.

Claims

1. An apparatus for preparing spherical oxide powder by controlled combustion, characterized in that: include The reaction chamber is configured to allow solid silicon particles to be burned to obtain silicon oxide droplets; The batching mechanism includes a powder channel, a gas supply pipeline, and a batching chamber. The gas supply pipeline is configured to introduce combustible gas and combustion-supporting gas into the batching chamber. A first flow control valve and a flow meter are installed in the gas supply pipeline. A conveying mechanism is configured to connect the dispensing mechanism and the reaction chamber. The conveying mechanism includes at least three raw material input channels. Each raw material input channel is provided with a second flow control valve. An angle adjustment component is provided between each raw material input channel and the reaction chamber. The angle adjustment component is configured to adjust the angle at which the raw material in the raw material input channel enters the reaction chamber. The cooling mechanism is configured to automatically spheroidize silica droplets in a suspended state and cool them to form solid spherical silica powder. A powder collection mechanism is connected to the bottom of the cooling mechanism, and the powder collection mechanism is configured to separate powder and gas.

2. The apparatus for preparing spherical oxide powder by controlled combustion according to claim 1, characterized in that: The angle adjustment assembly includes a guide bracket and a drive motor. The drive motor is fixedly installed in the reaction chamber, and the guide bracket is fixedly installed at the output end of the drive motor. The guide bracket is provided with a receiving portion to accommodate the raw material input channel, and one end of the raw material input channel near the reaction chamber is placed in the receiving portion.

3. The apparatus for preparing spherical oxide powder by controlled combustion according to claim 2, characterized in that: The side wall of the reaction chamber is provided with a dispersion gas inlet, which is used to input inert gas and is equipped with an adjustment device.

4. The apparatus for preparing spherical oxide powder by controlled combustion according to claim 3, characterized in that: The regulating device includes a pressure controller and a flow controller.

5. The apparatus for preparing spherical oxide powder by controlled combustion according to claim 1, characterized in that: The powder collection mechanism includes a cyclone separator, the outlet of which is connected to a membrane classifier, which is connected to a collection chamber.

6. The apparatus for preparing spherical oxide powder by controlled combustion according to claim 5, characterized in that: The powder collection mechanism is also equipped with an exhaust gas treatment component.

7. The apparatus for preparing spherical oxide powder by controlled combustion according to claim 1, characterized in that: The cooling mechanism includes a cooling chamber that is connected to the reaction chamber. A cavity is formed in the side wall of the cooling chamber, and a cooling pipe is installed inside the cavity.

8. The apparatus for preparing spherical oxide powder by controlled combustion according to claim 7, characterized in that: The cooling pipes are arranged in a spiral shape.

9. The apparatus for preparing spherical oxide powder by controlled combustion according to claim 1, characterized in that: An ignition assembly is also installed inside the reaction chamber.

10. The apparatus for preparing spherical oxide powder by controlled combustion according to claim 1, characterized in that: A gate is provided between the reaction chamber and the raw material input channel.

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