CN114307839A - Spherical silicon micro powder balling equipment and balling process thereof - Google Patents
Spherical silicon micro powder balling equipment and balling process thereof Download PDFInfo
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Abstract
The invention discloses spherical silicon micro powder balling equipment and a balling process thereof, which comprises a feeding device, a balling device and a collecting device which are sequentially arranged from left to right, wherein the feeding device, the balling device and the collecting device are integrally arranged in a horizontal manner, the feeding device comprises a feeding bin (1), a conveying mechanism is arranged at a discharge hole of the feeding bin (1), a conveying pipeline (2) is arranged between the conveying mechanism and the balling device, and a powder feeder (3), an oxygen quantitative filter (4) and a natural gas quantitative filter (5) are arranged on the conveying pipeline (2); the balling device comprises a balling furnace (6) and a primary collector (7) arranged on the lower side of the balling furnace (6); the collecting device comprises a secondary precision classifier (9) arranged at the outlet end of the balling furnace (6) and an ultrafine product collector (10). The invention has the advantage of safer use.
Description
Technical Field
The invention relates to the field of deep processing of nonmetallic ores, in particular to spherical silicon micro powder balling equipment and a balling process thereof.
Background
Silica micropowder (SiO 2) is a very widely used class of inorganic materials. The material has the characteristics of excellent dielectric property, low thermal expansion coefficient, small thermal conductivity, corrosion resistance, rich resources and the like. Due to the excellent physical properties, extremely high chemical stability and unique optical properties of the silica micropowder, the silica micropowder becomes one of the most important and most critical raw materials in many high and new technical fields. Modern microelectronics are currently moving at an alarming rate toward high integration, high density, and miniaturization. The rapid development of the advanced packaging technology of spherical silicon micropowder puts higher and higher requirements on packaging materials. 70-90% of epoxy plastic packaging material for packaging integrated circuits is silicon micropowder. When the integration degree reaches 1M-4M, namely partial spherical silicon powder is required to be added, and when the integration degree reaches 8M-16M, the spherical silicon powder is required to be used completely. The commonly called silica powder has an unplanned angular shape and poor flowability, so that the application of the silica powder in large-scale and ultra-large-scale integrated circuits is limited. The spherical silicon micro powder has good fluidity, can form a film uniformly after being stirred with resin, and reduces the addition amount of the resin, for example, the filling amount of the powder can reach 90.5 percent by weight. Experiments prove that the higher the consumption of the silicon powder in the epoxy plastic packaging material is, the smaller the thermal expansion coefficient of the silicon powder is, so that the lower the thermal conductivity coefficient is, the closer the thermal expansion coefficient value of the monocrystalline silicon is, the better the performance of the electronic device produced by the silicon powder is, and the plastic packaging material prepared from the spherical silicon powder has the smallest concentrated stress and the highest strength. Meanwhile, the spherical silicon micro powder has small friction coefficient and low abrasion to the die, and compared with angular powder, the spherical silicon micro powder can improve the service life of the die by more than one time. In the field of particle science, particles having a particle size of 1 μm or less are generally called ultrafine powders, and particles having a particle size of less than 0.1 μm are called nanopowders, and nanopowders are also included in the category of ultrafine powders. The ultramicro SiO2 has a molecular structure similar to that of silicon rubber due to high whiteness, high hardness, high temperature resistance and flame retardance, can be used for modification of reinforcing agents of silicon rubber and resin-based composite materials, can also be used as additives of novel products such as plastics, organic glass, coatings, paper and the like, and is also used for electronic plastic packaging in a super-large scale. It can play the role of infrared shielding, ultraviolet radiation resistance, high dielectric insulation and electrostatic shielding in functional materials, and has important application in the fields of bionic materials and the like. At present, in the process of balling spherical silicon micro powder, angular powder particles need to be instantly melted and then automatically shrunk into balls under the action of surface tension, so that at present, most of processes for preparing the spherical silicon micro powder by adopting a vertical furnace from top to bottom have certain potential safety hazards due to upward hot air, meanwhile, the balling sphericity is not enough due to fine powder particle size and gravity and draft, and the cost of burning by acetylene gas is high.
In patent CN201811637977.9, a device for producing high-purity superfine spherical silicon micropowder by heating fuel gas is disclosed, which comprises a micropowder bin, an atomizing device, a high-temperature melting furnace, a polymer cooling bin, a finished product bin and a dust removal system. The atomization device comprises an atomizer and a compressed air channel; the discharge port of the micro powder bin is connected to the atomizer through a conduit, and the conduit is connected to a compressed air channel; the upper end of the high-temperature melting furnace is provided with an atomizer, and the lower end of the high-temperature melting furnace is connected to a condensation cooling bin; the lower end of the condensing and cooling bin is connected with the finished product bin, and the side surface of the lower end of the condensing and cooling bin is connected with the dust removal system. The invention has the beneficial effects that: melting or gasifying particles by a high-temperature melting furnace, then performing poly-cooling to form balls, and screening and collecting according to the particle size of the powder, so that the spheroidization, classification and dust removal of the silicon micropowder are realized; the condensing and cooling bin adopts a design of a spherical cap type upper cover, so that the melted micro powder can be naturally cooled and contracted into a spherical shape and is easy to collect; the real-time regulation of particle diameter is realized through the amount of wind, compressed air's of controlling draught fan gas flow, raw materials particle diameter and reinforced volume, but this patent can not solve hot-air's potential safety hazard problem.
In patent CN201920118283.8, a superfine and high-purity silicon micropowder spheroidizing preparation apparatus is disclosed, which comprises a shell assembly, a feeding assembly, a water feeding assembly and a storage assembly, wherein the shell assembly comprises a shell, a motor bracket and a motor shell bracket, the motor bracket is fixedly connected with the shell and positioned at the middle position of the upper end of the shell, the motor is fixedly connected with the motor bracket and positioned at the top end of the motor bracket, and the shell bracket is fixedly connected with the shell and positioned at the bottom of the shell; according to the spheroidization preparation device for the superfine high-purity silicon micro powder, the high-purity silicon powder and water are fused when the high-purity silicon powder enters through the water inlet component, so that better spheroidization is facilitated, the drying box is arranged for drying the high-purity silicon powder fused with the water so as to achieve a better spheroidization effect, the filter screen is further arranged, the high-purity silicon powder which is not spheroidized is recovered, the spheroidization forming quality is preliminarily achieved, and the incomplete powder is recovered, but the problem of potential safety hazard of hot air cannot be solved.
In patent CN201811634372.4, a device and a method for producing high-purity superfine spherical silicon micropowder by countercurrent electric heating are disclosed, comprising a micropowder bin, an electric heating furnace, a spheroidizing furnace, a finished product bin and a screening system. The bottom of the spheroidizing furnace is connected with an electric heating furnace; the lower end of the electric heating furnace is connected with a compressed air channel, and the side of the compressed air channel is connected with a micro powder bin; the bottom of the spheroidizing furnace is also communicated with a finished product bin through a cooling pipe; the upper part of the spheroidizing furnace is connected with a screening system. Also discloses a method for producing the spherical quartz sand and the spherical quartz powder by using the device. The invention has the beneficial effects that: the spheroidization and classification of the silicon micropowder are realized by combining the spheroidization furnace and the classification system; the particle size of the spherical particles of the cyclone separator can be adjusted in real time by controlling the air quantity of the draught fan, the gas flow of compressed air and the feeding quantity, but the problem of potential safety hazard of hot air cannot be solved in the patent.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides spherical silicon micro powder balling equipment and a balling process thereof, which are used for instantly melting opposite-angle powder particles during preparation of spherical silicon micro powder.
The purpose of the invention is realized by the following technical scheme:
a spherical silica micropowder balling apparatus, comprising:
the feeding device, the balling device and the collecting device are sequentially arranged from left to right, the feeding device, the balling device and the collecting device are integrally arranged in a horizontal mode, the feeding device comprises a feeding bin, a discharge port of the feeding bin is provided with a conveying mechanism, a conveying pipeline is arranged between the conveying mechanism and the balling device, and a powder feeder, an oxygen quantitative filter and a natural gas quantitative filter are arranged on the conveying pipeline; the balling device comprises a balling furnace and a primary collector arranged on the lower side of the balling furnace; the collecting device comprises a secondary precision classifier and an ultrafine product collector which are arranged at the outlet end of the balling furnace.
Furthermore, a balling flame path is arranged at the feeding end of the balling furnace, and the discharging end of the conveying pipeline is communicated with the balling flame path.
Further, the primary collector has a primary product outlet on an underside thereof; the balling furnace is communicated with the secondary precision classifier through a first pipeline, and a secondary product outlet is formed in the lower side of the secondary precision classifier.
Furthermore, the secondary precision classifier is communicated with the superfine product collector through a second pipeline, and a fine product outlet is formed in the lower side of the superfine product collector.
Furthermore, electronic valves are arranged at the primary product outlet, the secondary product outlet and the fine product outlet.
Furthermore, a primary filter screen and a fine filter screen are respectively arranged in the primary collector and the superfine collector, and the diameter of a mesh on the primary filter screen is larger than that of a mesh on the fine filter screen.
Furthermore, a replaceable filter screen is arranged on the secondary precision classifier in a drawing and inserting mode.
Furthermore, the tail end of the collecting device is also provided with a waste gas discharging device, the waste gas discharging device comprises an exhaust fan, and the exhaust fan is communicated with the tail end of the superfine product collector through a third pipeline.
The balling process using the spherical silicon micropowder balling equipment comprises the following steps of:
firstly, an external natural gas inlet pipe is connected with a natural gas quantitative filter to filter natural gas impurities, an external oxygen inlet pipe is connected with an oxygen quantitative filter to filter oxygen impurities, the filtered oxygen is subjected to mixed combustion to obtain high-temperature flame at 2000-2200 ℃,
step two, simultaneously, the angular spherical silicon powder in the feeding bin is continuously combusted in a balling flame path to ensure that the temperature can be ensured to be capable of being fed into high-temperature flame through a powder feeder at a constant speed for instant melting, and then the angular spherical silicon powder enters a balling furnace for balling, cooling and grading;
and step three, carrying out primary classification in the balling furnace under the condition of natural gravity, collecting a primary product through a primary product outlet, then carrying out secondary classification through a secondary precision classifier, collecting the secondary product through a secondary product outlet, discharging the final superfine ball powder from a superfine product outlet after the superfine ball powder is collected by a superfine product collector, and pumping out and discharging waste gas of the whole balling equipment by an exhaust fan.
The invention has the beneficial effects that:
according to the spherical silicon micro powder balling equipment and the balling process thereof, the feeding device, the balling device and the collecting device are integrally arranged in a horizontal mode, so that the equipment is safer compared with a vertical furnace in horizontal placement; natural gas is used as combustion fuel in a balling furnace of the equipment, and compared with the cost of acetylene gas, the natural gas can be used for industrially producing the spherical silicon micro powder in a large scale; compared with grading after primary balling, the equipment is well integrated, and the balling and grading are integrated.
Drawings
FIG. 1 is a schematic diagram of the apparatus of the present invention.
In the figure, 1-a feeding bin, 2-a conveying pipeline, 3-a powder feeder, 4-an oxygen quantitative filter, 5-a natural gas quantitative filter, 6-a balling furnace, 7-a primary collector, 71-a primary product outlet, 9-a secondary precision classifier, 91-a secondary product outlet, 10-an ultrafine product collector, 101-a fine product outlet, 11-a balling flame path, 12-a first pipeline, 13-a second pipeline, 14-an electronic valve, 15-an exhaust fan and 16-a third pipeline.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In this embodiment, as shown in fig. 1, a spherical silicon micro powder pelletizing device includes a feeding device, a pelletizing device, and a collecting device, which are sequentially arranged from left to right, and the feeding device, the pelletizing device, and the collecting device are integrally arranged in a horizontal manner, the feeding device includes a feeding bin 1, a conveying mechanism is installed at a discharge port of the feeding bin 1, a conveying pipeline 2 is arranged between the conveying mechanism and the pelletizing device, and a powder feeder 3, an oxygen quantitative filter 4, and a natural gas quantitative filter 5 are arranged on the conveying pipeline 2; the balling device comprises a balling furnace 6 and a primary collector 7 arranged on the lower side of the balling furnace 6; the collecting device comprises a secondary precision classifier 9 and an ultrafine product collector 10 which are arranged at the outlet end of the balling furnace 6.
In this embodiment, add and be used for placing angular form silica powder in the feed bin 1, add and be provided with the sealed lid of articulated installation on the feed bin 1, sealed lid is fixed with the limiting plate, it still articulates to add feed bin 1 has the turning block, the turning block top spin has connect the regulation post, the extension end and the limiting plate phase adaptation of adjusting the post.
Through being whole horizontal arrangement with feed arrangement, balling-up device and collection device, it has more the security to compare the mode level of vertical furnace and place.
The conveying pipeline 2 is of an inverted T-shaped structure, the conveying pipeline 2 comprises a vertical pipeline and a transverse pipeline, the upper side end of the vertical pipeline is connected with the discharge end of the feeding bin 1, the lower side end of the vertical pipeline is communicated with the middle of the transverse pipeline, the powder feeder 3 is fixed on the left side end face of the transverse pipeline, and the right side end of the transverse pipeline is fixed on the outer side end face of the pelletizing fire channel 11; the oxygen quantitative filter 4 and the natural gas quantitative filter 5 are fixed on the transverse pipeline.
The powder feeder 3 feeds the angular fine silicon powder, the filtered oxygen and the natural gas to the pelletizing furnace 6 by blowing air to the inside.
The embodiment is further configured as follows: the feed end of the balling furnace 6 is provided with a balling flame path 11, and the discharge end of the conveying pipeline 2 is communicated with the balling flame path 11.
In this embodiment, the balling furnace 6 is an existing device, and the structure thereof is not described herein again; the inner wall of the fire pelletizing channel 11 is provided with a plurality of air blowing nozzles which are spirally arranged, the air blowing nozzles form two groups of air blowing nozzles and are provided with opposite spiral air channels, so that the inner wall of the fire pelletizing channel 11 can be spirally cleaned by positive and reverse air, and the angular silicon micro powder adsorbed on the inner wall of the fire pelletizing channel 11 can be cleaned.
Natural gas is used as combustion fuel in a balling furnace of the equipment, and compared with the cost of acetylene gas, the natural gas can be used for industrially producing the spherical silicon micro powder in a large scale; compared with grading after primary balling, the equipment is well integrated, and the balling and grading are integrated.
The embodiment is further configured as follows: the lower side of the primary collector 7 has a primary product outlet 71; the balling furnace 6 is communicated with the secondary precision classifier 9 through a first pipeline 12, and a secondary product outlet 91 is arranged at the lower side of the secondary precision classifier 9.
The embodiment is further configured as follows: the secondary precision classifier 9 is communicated with the superfine product collector 10 through a second pipeline 13, and the lower side of the superfine product collector 10 is provided with a fine product outlet 101.
The embodiment is further configured as follows: the electronic valves 14 are arranged at the primary product outlet 71, the secondary product outlet 91 and the fine product outlet 101.
In this embodiment, through electronic valve's setting for the automation mechanized work is carried out to this equipment of being convenient for, and the volume of can also counting.
The embodiment is further configured as follows: the primary collector 7 and the superfine product collector 10 are respectively provided with a primary filter screen and a fine product filter screen, and the diameter of meshes on the primary filter screen is larger than that of meshes on the fine product filter screen.
In this embodiment, the sizes of the particles collected in the primary collector 7 and the ultrafine product collector 10 are fixed by fixing the models of the primary filter screen and the fine product filter screen, so that an operator can conveniently receive the materials and place the materials.
The embodiment is further configured as follows: and a drawing and inserting type replaceable filter screen is arranged on the secondary precision classifier 9.
In the embodiment, the replaceable filter screen is arranged on the secondary precision classifier 9, so that the collection can be conveniently carried out according to the requirements of customers; the diameter of the meshes on the replaceable filter screen is between the diameter of the meshes on the primary filter screen and the diameter of the meshes on the fine filter screen.
The embodiment is further configured as follows: the tail end of the collecting device is also provided with a waste gas discharging device, the waste gas discharging device comprises an exhaust fan 15, and the exhaust fan 15 is communicated with the tail end of the superfine product collector 10 through a third pipeline 16.
In this embodiment, air exhauster 15 is used for discharging waste gas and the removal of drive spherical silica micropowder, air exhauster 15 is last can also to set up the filter cassette, filters the impurity in the waste gas through the filter cassette.
The balling process using the spherical silicon micropowder balling equipment comprises the following steps of:
firstly, an external natural gas inlet pipe is connected with a natural gas quantitative filter 5 to filter natural gas impurities, meanwhile, an external oxygen inlet pipe is connected with an oxygen quantitative filter 4 to filter oxygen impurities, the filtered oxygen is subjected to mixed combustion to obtain high-temperature flame at 2000-2200 ℃,
step two, simultaneously, the angular spherical silicon powder in the feeding bin 1 is continuously combusted in the balling flame path 11 to ensure that the temperature can be ensured to be capable of being fed into high-temperature flame at a constant speed through the powder feeder 3 for instant melting, and then the angular spherical silicon powder enters the balling furnace 6 for balling, cooling and grading;
and step three, carrying out primary classification in the balling furnace 6 under the condition of natural gravity, collecting a primary product through a primary product outlet 71, then carrying out secondary classification through a secondary precision classifier 9, collecting the secondary product through a secondary product outlet 91, discharging the final superfine ball powder from a superfine product outlet 101 after collecting the superfine ball powder by a superfine product collector 10, and pumping and discharging waste gas of the whole balling device by an exhaust fan 15.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "left", "right", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, or orientations or positional relationships that the products of the present invention are usually placed in when used, or orientations or positional relationships that are usually understood by those skilled in the art, and are used only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the equipment or the elements that are referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance. In the description of the present invention, it is also to be noted that, unless otherwise explicitly stated or limited, the terms "disposed" and "connected" are to be interpreted broadly, and for example, "connected" may be a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; the connection may be direct or indirect via an intermediate medium, and may be a communication between the two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Claims (9)
1. The utility model provides a spherical silica micropowder balling equipment which characterized in that includes:
the device comprises a feeding device, a balling device and a collecting device which are sequentially arranged from left to right, wherein the feeding device, the balling device and the collecting device are integrally arranged in a horizontal manner, the feeding device comprises a feeding bin (1), a discharge hole of the feeding bin (1) is provided with a conveying mechanism, a conveying pipeline (2) is arranged between the conveying mechanism and the balling device, and a powder feeder (3), an oxygen quantitative filter (4) and a natural gas quantitative filter (5) are arranged on the conveying pipeline (2); the balling device comprises a balling furnace (6) and a primary collector (7) arranged on the lower side of the balling furnace (6); the collecting device comprises a secondary precision classifier (9) arranged at the outlet end of the balling furnace (6) and an ultrafine product collector (10).
2. The spherical micro-silica powder pelletizing device according to claim 1, characterized in that: the feeding end of the balling furnace (6) is provided with a balling flame path (11), and the discharging end of the conveying pipeline (2) is communicated with the balling flame path (11).
3. The spherical micro-silica powder pelletizing device according to claim 1, characterized in that: the primary collector (7) having a primary product outlet (71) on the underside thereof; the balling furnace (6) is communicated with the secondary precision classifier (9) through a first pipeline (12), and a secondary product outlet (91) is formed in the lower side of the secondary precision classifier (9).
4. The spherical micro-silica powder pelletizing device according to claim 3, characterized in that: the secondary precision classifier (9) is communicated with the superfine product collector (10) through a second pipeline (13), and a fine product outlet (101) is formed in the lower side of the superfine product collector (10).
5. The spherical micro-silica powder pelletizing device according to claim 4, characterized in that: and electronic valves (14) are arranged at the primary product outlet (71), the secondary product outlet (91) and the fine product outlet (101).
6. The spherical micro-silica powder pelletizing device according to claim 4, characterized in that: the primary collector (7) and the superfine product collector (10) are respectively provided with a primary filter screen and a fine product filter screen, and the diameter of meshes on the primary filter screen is larger than that of meshes on the fine product filter screen.
7. The spherical micro-silica powder pelletizing device according to claim 4, characterized in that: and a drawing and inserting type replaceable filter screen is arranged on the secondary precision classifier (9).
8. The spherical micro-silica powder pelletizing device according to claim 1, characterized in that: the tail end of the collecting device is also provided with a waste gas discharging device, the waste gas discharging device comprises an exhaust fan (15), and the exhaust fan (15) is communicated with the tail end of the superfine product collector (10) through a third pipeline (16).
9. A balling process using the spherical silicon micropowder balling equipment as claimed in any one of claims 1 to 8, characterized by comprising the steps of:
firstly, an external natural gas inlet pipe is connected with a natural gas quantitative filter (5) to filter natural gas impurities, an external oxygen inlet pipe is connected with an oxygen quantitative filter (4) to filter oxygen impurities, the filtered oxygen is subjected to mixed combustion to obtain high-temperature flame at 2000-2200 ℃,
step two, simultaneously, angular spherical silicon powder in the feeding bin (1) is continuously combusted in a spherical flame path (11) to ensure that the temperature can be ensured to be capable of being fed into high-temperature flame at a constant speed through a powder feeder (3) for instant melting, and then the molten angular spherical silicon powder enters a balling furnace (6) for spheroidizing, cooling and grading;
and step three, carrying out primary classification in the balling furnace (6) under the condition of natural gravity, collecting a primary product through a primary product outlet (71), then carrying out secondary classification through a secondary precision classifier (9), collecting the secondary product through a secondary product outlet (91), discharging the final superfine ball powder from a superfine product outlet (101) after collecting the superfine ball powder by a superfine product collector (10), and pumping and discharging the waste gas of the whole balling device by an exhaust fan (15).
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115090507A (en) * | 2022-07-14 | 2022-09-23 | 中节能(达州)新材料有限公司 | Glass bead circularity screening platform |
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