Screening device for crushing filler aluminum hydroxide

Abstract

The utility model relates to a screening device for crushing filler aluminum hydroxide, and belongs to the technical field of aluminum hydroxide preparation. The device comprises a feeding pipe, a screening body, a discharging pipe, a temporary storage bin, a first dust collecting pipe and a suction generating unit. The feeding pipe communicates with a raw material supply unit. The screening body is communicated with a feeding pipe; the discharging pipe communicates with the screening body. The temporary storage bin is communicated with the discharging pipe; the first dust collecting pipe communicates with the screening body; the suction generating unit is communicated with the first dust collecting pipe; the device can be installed at the discharging end of a crushed filler aluminum hydroxide preparation unit, aluminum hydroxide is screened and subjected to impurity removal through the screening body, black spots and impurities in products are removed, then screened qualified materials are discharged, the products with excellent performance are obtained, and the requirement for high-end use scenes can be met.

Description

Technical Field

[0001] This application relates to the technical field of aluminum hydroxide preparation, and particularly to a screening device for pulverized filler aluminum hydroxide. Background Art

[0002] Filler aluminum hydroxide has stable properties at room temperature, decomposes and dehydrates to generate alumina when heated, enabling the product to have a flame-retardant and self-extinguishing function, and does not produce toxic and corrosive gases when heated and decomposed. It is a good flame-retardant and insulating filler, and has a wide range of applications in composite material industries such as artificial boards, molding plastics, and epoxy resin potting.

[0003] Due to different application fields, there are many sub-processes for each product. Among them, those subdivided according to particle size distribution account for more than 80%. Different particle size precision requirements are relatively high, with the smallest difference being 1μm. The particle size range between the same products is 2 - 3 microns, requiring extremely strict process conditions; and in this industry, the requirements for black dots and impurities are extremely high, without any impurities allowed. The higher the end - use field, the higher the requirement for black dots. For pure white boards, it is required that there be no more than 5 black dots on one board. Utility Model Content

[0004] This application provides a screening device for pulverized filler aluminum hydroxide, which can provide filler aluminum hydroxide meeting high - end usage scenarios.

[0005] This application provides a screening device for pulverized filler aluminum hydroxide, and the device includes:

[0006] A feed pipe for supplying raw materials to be screened, and the feed pipe is connected to a raw material supply unit;

[0007] A screening body for screening the raw materials to be screened, and the screening body is connected to the feed pipe;

[0008] A discharge pipe for discharging the qualified screened materials from the screening body, and the discharge pipe is connected to the screening body;

[0009] A temporary storage bin for temporarily storing the qualified screened materials, and the temporary storage bin is connected to the discharge pipe;

[0010] A first dust collection pipe for discharging the waste screened materials from the screening body, and the first dust collection pipe is connected to the screening body;

[0011] A suction generating unit for providing the discharge power of the waste screened materials for the first dust collection pipe, and the suction generating unit is connected to the first dust collection pipe.

[0012] As an optional implementation manner, the screening body is a centrifugal sieve.

[0013] As an optional implementation manner, the temporary storage bin is in the shape of a closed feed hopper.

[0014] As an alternative embodiment, a first switch is provided on the first dust collection pipe to control the start and stop of discharging the screened waste materials from the screening body.

[0015] As an alternative embodiment, the first switch is a butterfly valve.

[0016] As an alternative embodiment, the connection position between the discharge pipe and the temporary storage bin is located at the center of the top end of the temporary storage bin.

[0017] As an alternative embodiment, the device further includes a second dust collection pipe. One end of the second dust collection pipe is connected to the temporary storage bin to discharge the screened waste materials in the temporary storage bin, and the other end of the second dust collection pipe is connected to the suction generating unit to obtain the discharge power of the screened waste materials.

[0018] As an alternative embodiment, a second switch is provided on the second dust collection pipe to control the start and stop of discharging the screened waste materials in the temporary storage bin.

[0019] As an alternative embodiment, the second switch is a butterfly valve.

[0020] As an alternative embodiment, the connection position between the second dust collection pipe and the temporary storage bin is located at the edge of the top end of the temporary storage bin.

[0021] The above technical solutions provided by the embodiments of the present application have the following advantages compared with the prior art:

[0022] The device provided by the embodiment of the present application can be installed at the discharge end of the crushing filler aluminum hydroxide preparation unit. The aluminum hydroxide is screened and purified by the screening body to remove black spots and impurities in the product, and then the qualified screened materials are discharged to obtain a product with excellent performance, which can meet high-end usage scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings herein are incorporated into the specification and constitute a part of the specification, showing embodiments consistent with the present application, and are used together with the specification to explain the principles of the present application.

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the accompanying drawings required for the description of the embodiments or the prior art. Obviously, 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 screening device provided by the embodiment of the present application.

[0026] Reference numerals: 1 - feed pipe, 2 - screening body, 3 - discharge pipe, 4 - temporary storage bin, 5 - first dust collection pipe, 6 - first switch, 7 - second dust collection pipe, 8 - second switch. Detailed implementation manners

[0027] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Apparently, the described embodiments are some but not all of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the scope of protection of the present application.

[0028] Unless otherwise specifically stated, all kinds of raw materials, reagents, instruments, equipment, etc. used in the present application can be obtained through market purchase or can be prepared by existing methods.

[0029] Currently, extremely high requirements are imposed on the black dots and impurities of filler aluminum hydroxide, and there should be no impurities. The higher the end - use field, the higher the requirement for black dots. For pure - white boards, it is required that there be no more than 5 black dots on one board. The existing filler aluminum hydroxide is difficult to meet high - end application scenarios.

[0030] The present application intends to provide a screening device for crushing filler aluminum hydroxide, which can provide filler aluminum hydroxide that meets high - end use scenarios.

[0031] Figure 1 As shown in the structural schematic diagram of the screening device provided for the embodiments of the present application, Figure 1 The embodiments of the present application provide a screening device for crushing filler aluminum hydroxide. The device includes: a feed pipe, a screening body, a discharge pipe, a temporary storage bin, a first dust collection pipe, and a suction generating unit. The feed pipe is used to supply the raw material to be screened, and the feed pipe is connected to the raw material supply unit; the screening body is used to screen the raw material to be screened, and the screening body is connected to the feed pipe; the discharge pipe is used to discharge the qualified material screened by the screening body, and the discharge pipe is connected to the screening body; the temporary storage bin is used to temporarily store the qualified material screened, and the temporary storage bin is connected to the discharge pipe; the first dust collection pipe is used to discharge the waste material screened by the screening body, and the first dust collection pipe is connected to the screening body; the suction generating unit is used to provide the discharge power for the waste material screened by the first dust collection pipe, and the suction generating unit is connected to the first dust collection pipe.

[0032] The device can be installed at the discharge end of the crushing filler aluminum hydroxide preparation unit. The aluminum hydroxide is screened and purified by the screening body to remove black dots and impurities in the product, and then the qualified material screened is discharged to obtain a product with excellent performance, which can meet high - end use scenarios.

[0033] In some embodiments, the screening body may be selected from a centrifugal sieve.

[0034] In some embodiments, the temporary storage bin is in the shape of a closed material discharge hopper. Exemplarily, the temporary storage bin may be in the shape of a conical hopper, a pyramidal hopper, etc. The closed temporary storage bin can prevent the dust pollution of the production environment generated when the material discharged from the discharge pipe falls into the temporary storage bin. At the same time, this design can also provide conditions for re-screening.

[0035] In some embodiments, a first switch is provided on the first dust collection pipe to control the start and stop of the screening waste material discharged from the screening body. Specifically, the first switch may be selected from a butterfly valve.

[0036] In some embodiments, the connection position between the discharge pipe and the temporary storage bin is located at the center of the top end of the temporary storage bin. By arranging the discharge pipe at the center of the top end of the temporary storage bin, the distance that the material reaches the side wall of the temporary storage bin after being discharged from the discharge pipe is effectively increased, which is conducive to its flying in the temporary storage bin and provides conditions for re-screening.

[0037] In some embodiments, the device further includes a second dust collection pipe. One end of the second dust collection pipe is connected to the temporary storage bin to discharge the screening waste material in the temporary storage bin, and the other end of the second dust collection pipe is connected to the suction generating unit to obtain the discharge power of the screening waste material. By providing the second dust collection pipe, the flying materials in the temporary storage bin can be removed, and the raw materials can be re-screened.

[0038] In some embodiments, a second switch is provided on the second dust collection pipe to control the start and stop of the screening waste material discharged from the temporary storage bin. By providing the second switch, it is possible to judge whether to open the second dust collection pipe according to the actual product requirements, taking into account the production cost, efficiency and product quality. Specifically, the second switch may be selected from a butterfly valve.

[0039] In some embodiments, the connection position between the second dust collection pipe and the temporary storage bin is located at the edge of the top end of the temporary storage bin. By arranging the second dust collection pipe at the edge of the top end of the temporary storage bin, a good impurity removal effect can be achieved without affecting the raw material feeding, and thus a good screening effect can be obtained.

[0040] The implementation principle of the entire device is as follows: Connect the feed pipe to the raw material supply unit (which can be the filler aluminum hydroxide production unit). The raw materials to be screened enter the screening body through the feed pipe. In the screening body, impurities (such as black dots) in the raw materials are sucked away by the first dust collection pipe. The raw materials after the impurities are sucked away enter the temporary storage bin as qualified screened materials through the discharge pipe. The qualified screened materials generate dust in the temporary storage bin, causing the impurities to fly. The suction force of the second dust collection pipe can suck away the flying impurities in the temporary storage bin to achieve secondary impurity removal. The un-flying qualified screened materials fall under gravity in the temporary storage bin and are discharged to the designated area to complete the screening. The indicators of the screened filler aluminum hydroxide are stable, its performance is improved, the particle size distribution is more concentrated, the D50 of the product has little fluctuation, the product has high uniformity, the content of black dots and impurities in the product is controlled, the manufacturing cost of customers is reduced, and it can be applied in higher-end application scenarios.

[0041] The following further elaborates on this application in combination with specific embodiments. It should be understood that these embodiments are only used to illustrate this application and not to limit the scope of this application. For the experimental methods without specific conditions indicated in the following embodiments, they are usually determined according to national standards. If there is no corresponding national standard, they are carried out according to general international standards, conventional conditions, or the conditions recommended by the manufacturer.

[0042] Comparative Example 1

[0043] The parameters for preparing filler aluminum hydroxide with a particle size of 50 ± 10 μm in a certain filler aluminum hydroxide production unit are as follows:

[0044]

[0045] Example 1

[0046] Install a screening device at the rear end of the filler aluminum hydroxide production unit in Comparative Example 1. The screening device includes:

[0047] A feed pipe for supplying the raw materials to be screened, and the feed pipe is connected to the raw material supply unit;

[0048] A screening body for screening the raw materials to be screened, and the screening body is connected to the feed pipe; the screening body is a centrifugal sieve;

[0049] A discharge pipe for discharging the qualified screened materials from the screening body, and the discharge pipe is connected to the screening body;

[0050] A temporary storage bin for temporarily storing the qualified screened materials, and the temporary storage bin is connected to the discharge pipe. The connection position between the discharge pipe and the temporary storage bin is at the center of the top of the temporary storage bin; the temporary storage bin is in the shape of a closed hopper;

[0051] A first dust collection pipe for discharging the screened waste materials from the screening body, and the first dust collection pipe is connected to the screening body;

[0052] A suction generating unit, used to provide the discharge power for screening waste materials for the first dust collection pipe, and the suction generating unit is connected to the first dust collection pipe;

[0053] A second dust collection pipe, one end of the second dust collection pipe is connected to the temporary storage bin, used to discharge the screened waste materials in the temporary storage bin, and the connection position between the second dust collection pipe and the temporary storage bin is at the edge of the top of the temporary storage bin; the other end of the second dust collection pipe is connected to the suction generating unit to obtain the discharge power for the screened waste materials.

[0054] The parameters of the prepared filler aluminum hydroxide are as follows:

[0055]

[0056] It can be seen that compared with the product of Comparative Example 1, under the same condition of D50, the D10 particle size of the product obtained in this example is increased by 18.2%, the D90 particle size is increased by 1.86%, the fine particles below D10 are effectively excluded, and the fluctuation of the crushed product is reduced from 5μm to 3μm.

[0057] Comparative Example 2

[0058] The parameters of a certain filler aluminum hydroxide production unit for preparing filler aluminum hydroxide with a particle size of 25±5μm are as follows:

[0059]

[0060] Example 2

[0061] A screening device is installed at the rear end of the filler aluminum hydroxide production unit of Comparative Example 2. The screening device includes:

[0062] A feed pipe, used to supply the raw materials to be screened, and the feed pipe is connected to the raw material supply unit;

[0063] A screening body, used to screen the raw materials to be screened, and the screening body is connected to the feed pipe; the screening body is a centrifugal sieve;

[0064] A discharge pipe, used to discharge the qualified screened materials of the screening body, and the discharge pipe is connected to the screening body;

[0065] A temporary storage bin, used to temporarily store the qualified screened materials, the temporary storage bin is connected to the discharge pipe, and the connection position between the discharge pipe and the temporary storage bin is at the center of the top of the temporary storage bin; the temporary storage bin is in the shape of a closed feeding hopper;

[0066] A first dust collection pipe, used to discharge the screened waste materials of the screening body, and the first dust collection pipe is connected to the screening body;

[0067] A suction generating unit, used to provide the discharge power for the screened waste materials for the first dust collection pipe, and the suction generating unit is connected to the first dust collection pipe;

[0068] The second dust collection pipe, one end of the second dust collection pipe is connected to the temporary storage bin, used to discharge the screened waste materials in the temporary storage bin, and the connection position between the second dust collection pipe and the temporary storage bin is located at the edge of the top of the temporary storage bin; the other end of the second dust collection pipe is connected to the suction generating unit, used to obtain the discharge power of the screened waste materials.

[0069] The parameters of the prepared filler aluminum hydroxide are as follows:

[0070]

[0071] It can be seen that compared with the product of Comparative Example 2, under the same D50 condition, the D10 particle size of the product obtained in this example is increased by 12.7%, the D90 particle size is increased by 2.5%, the fine particles below D10 are effectively excluded, and the fluctuation of the crushed product is reduced from 3μm to 2μm.

[0072] Comparative Example 3

[0073] The parameters of a certain filler aluminum hydroxide production unit for preparing filler aluminum hydroxide with a particle size of 15±3μm are as follows:

[0074]

[0075] Example 3

[0076] Install a screening device at the rear end of the filler aluminum hydroxide production unit of Comparative Example 3. The screening device includes:

[0077] The feed pipe is used to supply the raw materials to be screened, and the feed pipe is connected to the raw material supply unit;

[0078] The screening body is used to screen the raw materials to be screened, and the screening body is connected to the feed pipe; the screening body is a centrifugal screen;

[0079] The discharge pipe is used to discharge the qualified screened materials of the screening body, and the discharge pipe is connected to the screening body;

[0080] The temporary storage bin is used to temporarily store the qualified screened materials. The temporary storage bin is connected to the discharge pipe, and the connection position between the discharge pipe and the temporary storage bin is located at the center of the top of the temporary storage bin; the temporary storage bin is in the shape of a closed hopper;

[0081] The first dust collection pipe is used to discharge the screened waste materials of the screening body, and the first dust collection pipe is connected to the screening body;

[0082] The suction generating unit is used to provide the discharge power of the screened waste materials for the first dust collection pipe, and the suction generating unit is connected to the first dust collection pipe;

[0083] The second dust collection pipe, one end of the second dust collection pipe is connected to the temporary storage bin for discharging the screened waste materials in the temporary storage bin, and the connection position between the second dust collection pipe and the temporary storage bin is located at the edge of the top end of the temporary storage bin; the other end of the second dust collection pipe is connected to the suction generating unit for obtaining the discharge power of the screened waste materials.

[0084] The parameters of the prepared filler aluminum hydroxide are as follows:

[0085]

[0086] It can be seen that compared with the product of Comparative Example 3, under the same D50 condition, the D10 particle size of the product obtained in this embodiment is increased by 6.4%, the D90 particle size is increased by 0.1%, the fine particles below D10 are effectively excluded, and the fluctuation of the crushed product is reduced from 3 μm to 2 μm.

[0087] The various embodiments of the present application may exist in the form of a range; it should be understood that the description in the form of a range is only for convenience and brevity and should not be construed as a rigid limitation on the scope of the present application; therefore, it should be considered that the range description has specifically disclosed all possible sub-ranges and the individual values within that range. For example, the range description from 1 to 6 should be considered to have specifically disclosed sub-ranges such as from 1 to 3, from 1 to 4, from 1 to 5, from 2 to 4, from 2 to 6, from 3 to 6, etc., and the individual numbers within the range, such as 1, 2, 3, 4, 5, and 6, and this applies regardless of the range. Additionally, whenever a numerical range is indicated herein, it means including any recited number (fraction or integer) within the indicated range.

[0088] In this application, unless otherwise specified, the orientation terms such as "upper" and "lower" specifically refer to the drawing directions in the accompanying drawings. Additionally, in the description of the specification of this application, the terms "include", "comprise", etc. mean "including but not limited to". In this text, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. In this text, "and / or" describes the association relationship of associated objects and indicates that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist simultaneously, or B exists alone. Here, A and B can be singular or plural. In this text, "at least one" means one or more, and "a plurality" means two or more. "At least one kind", "at least one of the following (items)" or similar expressions refer to any combination of these items, including any combination of single item (s) or plural items (s). For example, "at least one of (items) a, b, or c", or "at least one of (items) a, b, and c" can both mean: a, b, c, a - b (i.e., a and b), a - c, b - c, or a - b - c, where a, b, and c can be single or multiple respectively.

[0089] The above are only specific implementation manners of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application will not be limited to these embodiments shown herein, but rather to the broadest scope consistent with the principles and novel features claimed herein.

Claims

1. A screening device for crushed filler aluminum hydroxide, characterized in that The device includes: A feed pipe for supplying raw materials to be screened, and the feed pipe is connected to a raw material supply unit; A screening body for screening the raw materials to be screened, and the screening body is connected to the feed pipe; A discharge pipe for discharging the qualified screened materials from the screening body, and the discharge pipe is connected to the screening body; A temporary storage bin for temporarily storing the qualified screened materials, and the temporary storage bin is connected to the discharge pipe; A first dust collection pipe for discharging the waste screened materials from the screening body, and the first dust collection pipe is connected to the screening body; A suction generating unit for providing the discharge power of the waste screened materials for the first dust collection pipe, and the suction generating unit is connected to the first dust collection pipe.

2. The screening device for crushed filler aluminum hydroxide according to claim 1, wherein The screening body is a centrifugal sieve.

3. The screening device for pulverized filler aluminum hydroxide according to claim 1, characterized in that, The temporary storage bin is in the shape of a closed hopper for discharging materials.

4. The screening device for crushed filler aluminum hydroxide according to claim 1, characterized in that, A first switch is provided on the first dust collection pipe for controlling the start and stop of discharging the waste screened materials from the screening body.

5. The screening device for crushed filler aluminum hydroxide according to claim 4, characterized in that, The first switch is a butterfly valve.

6. The screening device for crushed filler aluminum hydroxide according to claim 1, wherein, The connection position between the discharge pipe and the temporary storage bin is at the center of the top end of the temporary storage bin.

7. The screening device for crushed filler aluminum hydroxide according to claim 1, characterized in that, The device further includes a second dust collection pipe. One end of the second dust collection pipe is connected to the temporary storage bin for discharging the waste screened materials in the temporary storage bin, and the other end of the second dust collection pipe is connected to the suction generating unit for obtaining the discharge power of the waste screened materials.

8. The screening device for crushed filler aluminum hydroxide according to claim 7, characterized in that, A second switch is provided on the second dust collection pipe for controlling the start and stop of discharging the waste screened materials in the temporary storage bin.

9. The screening device for pulverized filler aluminum hydroxide according to claim 8, characterized in that, The second switch is a butterfly valve.

10. The screening device for crushed filler aluminum hydroxide according to claim 7, characterized in that, The connection position between the second dust collection pipe and the temporary storage bin is at the edge of the top end of the temporary storage bin.

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