A device and method for reducing the surface energy of spherical silicon dioxide powder

Abstract

The present invention discloses a device and method for reducing the surface energy of spherical silica micropowder, belonging to the technical field of silicon particle processing. The device includes a main gas conduit in a circular ring shape, and sealing covers are fixedly installed on both sides of the circular cavity surrounded by the main gas conduit; the main gas conduit is connected to an air inlet pipe connected to the main gas conduit cavity, and a plurality of gas branch conduits and atomizing nozzles are provided on the inner circular wall of the main gas conduit, and a plurality of atomizing nozzles are also installed on the outer wall of the gas branch conduit; the gas branch conduits and the atomizing nozzles are both in a circular cavity sealed by a sealing cover; a feed pipe and a discharge pipe are installed on the sealing covers on both sides. The present invention uses high-speed gas containing deionized water to impact the surface of silicon micropowder, so that stable silanol bonds are formed on the surface of silicon dioxide micropowder particles, reducing the surface energy of spherical silicon dioxide micropowder, realizing the smooth production of spherical silicon dioxide micropowder and improving the performance of the product in the downstream of the industrial chain.

Description

Technical Field

[0001] The invention relates to silicon particle processing technology, in particular to a device and method for reducing the surface energy of spherical silicon dioxide micropowder. Background Art

[0002] At present, there are many methods for preparing spherical silica powder, including flame spheronization, high temperature melt spraying, plasma method and chemical synthesis method. Among them, the flame spheronization, high temperature melt spraying and plasma method are because in the process of particle spheronization, part of the heat energy provided to the particles by the outside world is used to melt the particles, and the other part is converted into the energy of the particles themselves. At the same time, in the particle spheronization process, the silanol groups on the surface of the silica particles are dehydrated to form unstable silicon-oxygen bonds, resulting in the spherical silica powder produced having a higher surface energy, which will increase the difficulty of collecting the spherical silicon powder and the performance of its use. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a device which can effectively reduce the surface energy of spherical silicon dioxide micropowder and improve the use performance of silicon dioxide micropowder in view of the shortcomings of the prior art.

[0004] Another technical problem to be solved by the present invention is to provide a method for effectively reducing the surface energy of spherical silica powder and improving the performance of the silica powder.

[0005] The technical problem to be solved by the present invention is achieved through the following technical scheme: The present invention is a device for reducing the surface energy of spherical silica micropowder, which is characterized by: comprising a gas main conduit in a circular ring shape, and sealing cover plates are fixedly installed on both sides of the circular cavity surrounded by the gas main conduit; the gas main conduit is connected to an air inlet pipe connected to the gas main conduit cavity, a plurality of gas branch conduits and atomizing nozzles are opened on the inner circular wall of the gas main conduit, and a plurality of atomizing nozzles are also installed on the outer wall of the gas branch conduit; the gas branch conduits and the atomizing nozzles are both in a circular cavity sealed by a sealing cover plate; a feed pipe and a discharge pipe are installed on the sealing cover plates on both sides.

[0006] The technical problem to be solved by the present invention can also be further achieved through the following technical scheme. In the above-mentioned device for reducing the surface energy of spherical silica powder, three gas branch conduits pointing to the center of the circular cavity are evenly opened on the inner circular tube wall of the gas main conduit, and the outer ends of the three gas branch conduits are closed and fixed on the center frame.

[0007] The technical problem to be solved by the present invention can also be further achieved through the following technical scheme. In the above-mentioned device for reducing the surface energy of spherical silica powder, each atomizing nozzle is connected to an atomizing nozzle mounting portion preset on the wall of the gas duct through its internal thread, and the mounting portion is provided with an external thread.

[0008] The technical problem to be solved by the present invention can be further achieved by the following technical solution: in the above-mentioned device for reducing the surface energy of spherical silica powder, three feed pipes are evenly arranged on the sealing cover plate on one side, and three discharge pipes are arranged on the sealing cover plate on the other side.

[0009] The technical problem to be solved by the present invention can be further achieved by the following technical solution. In the above-mentioned device for reducing the surface energy of spherical silica powder, connecting flanges are fixedly installed on the feed pipe and the discharge pipe.

[0010] The present invention also provides a method for reducing the surface energy of spherical silica micropowder, which uses a device for reducing the surface energy of spherical silica micropowder as described in any one of the above items, and is characterized in that it comprises the following steps:

[0011] (1) The input and output pipes of the spherical silica powder are respectively connected to the feed pipe and the discharge pipe of the device for reducing the surface energy of the spherical silica powder; the spherical silica powder enters from the feed pipe into a circular cavity surrounded by the main gas pipe and sealed by the sealing cover plate;

[0012] (2) The gas containing deionized water is transported to the gas main conduit through the air inlet pipe, and then to each gas branch conduit, and then sprayed out at high speed through the atomizing nozzle, colliding with the spherical silica micropowder flowing through the circular cavity, so that a stable silanol bond is formed on the surface of the spherical silica micropowder, reducing its surface energy, and then output to the spherical silica micropowder output pipe through the discharge pipe to enter the next process.

[0013] The technical problem to be solved by the present invention can also be further achieved by the following technical solution. In the above-mentioned method for reducing the surface energy of spherical silica powder, in the step (2), the pressure range of the compressed gas containing deionized water input into the gas main conduit is 0.1 MPa to 0.4 MPa.

[0014] Compared with the prior art, the beneficial technical effects of the present invention are as follows: the present invention utilizes high-speed gas containing deionized water to collide with spherical silica micropowder, so that relatively stable silanol bonds are formed on the surface of the silica micropowder particles, thereby reducing its surface energy, achieving smooth production of spherical silica micropowder and improving the performance of the product in the downstream of the industrial chain; the arranged gas branch conduits and atomizing nozzles can improve the uniformity of spraying of high-speed gas containing deionized water, further enhancing the effect of the device in reducing the surface energy of spherical silica micropowder. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of a device for reducing the surface energy of spherical silicon dioxide powder according to the present invention;

[0016] Figure 2 It is a structural schematic diagram of section AA of the present invention;

[0017] Figure 3 yes Figure 2 Enlarged view of part B. DETAILED DESCRIPTION

[0018] The specific technical solutions of the present invention are further described below with reference to the accompanying drawings, so that those skilled in the art can further understand the present invention without limiting the rights thereof.

[0019] Example 1, reference Figure 1-Figure 3 A device for reducing the surface energy of spherical silica powder comprises a main gas conduit 12 in a circular shape, and sealing covers 1 are fixedly installed on both sides of a circular cavity 15 surrounded by the main gas conduit 12; the main gas conduit 12 is connected to an air inlet pipe 11 connected to the main gas conduit cavity, a plurality of gas branch conduits 13 and atomizing nozzles 14 are opened on the inner circular wall of the main gas conduit 12, and a plurality of atomizing nozzles 14 are also installed on the outer wall of the gas branch conduit 13; the gas branch conduits 13 and the atomizing nozzles 14 are both in a circular cavity 15 sealed by the sealing cover 1; a feed pipe 16 and a discharge pipe 19 are installed on the sealing covers 1 on both sides.

[0020] Embodiment 2, in the device for reducing the surface energy of spherical silica powder described in Embodiment 1, three gas branch conduits 13 pointing to the center of the circular cavity 15 are evenly opened on the inner circular wall of the gas main conduit 12, and the outer ends of the three gas branch conduits are closed and fixed on the center frame 20; this can avoid the gas in different branch conduits from conflicting and affecting the performance of the device; two atomizing nozzles 14 are installed on each gas branch conduit 13, and six atomizing nozzles 14 are evenly arranged on the inner circular wall of the gas main conduit;

[0021] Each atomizing nozzle 14 is connected to an atomizing nozzle mounting portion 18 preset on the wall of the gas conduit through its internal thread, and the mounting portion 18 is provided with an external thread.

[0022] Example 3, in the device for reducing the surface energy of spherical silica powder described in Example 1, three feed pipes 16 are evenly arranged on the sealing cover plate 1 on one side, and three discharge pipes 19 are arranged on the sealing cover plate 1 on the other side; the feed pipe 16 and the discharge pipe 19 are fixedly installed with a connecting flange 17.

[0023] Embodiment 4, a method for reducing the surface energy of spherical silica powder, the method adopts the device described in any one of the above embodiments, and the steps are as follows:

[0024] (1) The input pipe 21 and the output pipe 22 of the spherical silica powder are respectively connected to the feed pipe 16 and the discharge pipe 19 of the device for reducing the surface energy of the spherical silica powder; the spherical silica powder enters the circular cavity 15 surrounded by the main gas pipe 12 and sealed by the sealing cover plate 1 from the feed pipe 16;

[0025] (2) The gas containing deionized water is transported to the gas main conduit 12 through the air inlet pipe 11, and then to each gas branch conduit 13, and then sprayed out at high speed through the atomizing nozzle 14, colliding with the spherical silica micropowder flowing through the circular cavity 15, so that stable silanol bonds are formed on the surface of the spherical silica micropowder, reducing its surface energy, and then output to the spherical silica micropowder output pipe 22 through the discharge pipe 19 to enter the next process; the surface energy of the spherical silica micropowder after treatment is reduced, and it can be better used in the downstream product chain.

[0026] Example 5, in the method for reducing the surface energy of spherical silica powder described in Example 4, in step (2), the pressure range of the compressed gas containing deionized water input into the gas main conduit 12 is 0.1MPa to 0.4MPa; this ensures that the compressed gas has sufficient speed to impact the spherical silica powder.

Claims

1. A device for reducing the surface energy of spherical silicon dioxide powder, characterized in that: It comprises a main gas conduit in a circular shape, and sealing covers are fixedly installed on both sides of the circular cavity formed by the main gas conduit; the main gas conduit is connected to an air inlet pipe connected to the conduit cavity of the main gas conduit, a plurality of gas branch conduits and atomizing nozzles are opened on the inner circular wall of the main gas conduit, and a plurality of atomizing nozzles are also installed on the outer wall of the gas branch conduit; the gas branch conduits and the atomizing nozzles are both in the circular cavity sealed by the sealing cover; a feed pipe and a discharge pipe are installed on the sealing covers on both sides.

2. The device for reducing the surface energy of spherical silicon dioxide powder according to claim 1, characterized in that: Three gas branch conduits pointing to the center of the circular cavity are evenly arranged on the inner circular tube wall of the main gas conduit, and the outer ends of the three gas branch conduits are closed and fixed on the central frame.

3. The device for reducing the surface energy of spherical silicon dioxide powder according to claim 1, characterized in that: Each atomizing nozzle is connected to an atomizing nozzle mounting portion preset on the wall of the gas conduit through its internal thread, and the mounting portion is provided with an external thread.

4. The device for reducing the surface energy of spherical silicon dioxide powder according to claim 1, characterized in that: Three feed pipes are evenly arranged on the sealing cover plate on one side, and three discharge pipes are arranged on the sealing cover plate on the other side.

5. The device for reducing the surface energy of spherical silicon dioxide powder according to claim 1 or 4, characterized in that: Connecting flanges are fixedly installed on both the feed pipe and the discharge pipe.

6. A method for reducing the surface energy of spherical silica powder, characterized in that: The method adopts the device as described in any one of claims 1-5, and the steps are as follows: (1) The input and output pipes of the spherical silica powder are respectively connected to the feed pipe and the discharge pipe of the device for reducing the surface energy of the spherical silica powder; the spherical silica powder enters from the feed pipe into a circular cavity surrounded by the main gas pipe and sealed by the sealing cover plate; (2) The gas containing deionized water is transported to the gas main conduit through the air inlet pipe, and then to each gas branch conduit, and then sprayed out at high speed through the atomizing nozzle, colliding with the spherical silica micropowder flowing through the circular cavity, so that a stable silanol bond is formed on the surface of the spherical silica micropowder, reducing its surface energy, and then output to the spherical silica micropowder output pipe through the discharge pipe to enter the next process.

7. A method for reducing the surface energy of spherical silica powder according to claim 6, characterized in that: In step (2), the pressure range of the compressed gas containing deionized water input into the gas main conduit is 0.1 MPa to 0.4 MPa.

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