Five-stage zinc ash screening device

Abstract

The utility model relates to the technical field of zinc ash screening, and discloses a five-stage zinc ash screening device which comprises a ball mill, a first screening mechanism, a second-stage vibrating screen, a spiral conveyor and a third-stage vibrating screen. By means of the zinc ash screening device, zinc ash can be screened for four times, fine screening of the zinc ash is achieved, zinc ash of five particle sizes can be generated, the consistency of the particle sizes of the zinc ash of all the particle size grades can be effectively improved, the zinc ash of all the particle size grades can be recycled or sold out conveniently, the economic benefits of zinc ash treatment can be improved, and the zinc ash screening device is worthy of popularization and application. And the zinc ash of each granularity grade is clearly graded, so that the condition that meshes of each grade of screen are blocked can be effectively reduced, and the zinc ash of different granularity grades can be effectively prevented from being mixed.

Description

Technical Field

[0001] The utility model belongs to the technical field of zinc ash screening, and specifically relates to a five-stage zinc ash screening device. Background Art

[0002] Zinc ash is a by-product produced during the production process of hot-dip galvanizing plants and electrolytic zinc plants. Its main components are zinc oxide, metallic zinc and some impurities. Zinc oxide and metallic zinc have high economic value, so they need to be ground and crushed by a ball mill before being recycled and sold for takeaway.

[0003] In the prior art, ball mills are usually two-stage screening, and the classification of the screened zinc ash is relatively rough, with only two levels, so that the zinc ash after grinding and separation can only be returned to the zinc powder system to produce zinc powder at one level, and the other level is directly sold out, which is not conducive to further classification and recycling, and the economic benefits are not high. In addition, under the condition of two-stage screening, there is a problem that the zinc ash particle size classification is not clear enough, so that the particle sizes of zinc ash of two particle size levels are uneven, which makes it easy for the mesh of the screen to be blocked, thereby affecting the screening effect, and easily leading to confusion in the classification of zinc ash, which is not conducive to the recovery and sale of zinc ash. Utility Model Content

[0004] In order to solve or partially solve the problems existing in the related art, the utility model provides a five-level zinc ash screening device, which can screen the zinc ash four times, realize the fine screening of the zinc ash, and produce zinc ash of five particle sizes, which can effectively improve the consistency of the zinc ash particle size of each particle size grade, and is convenient for the separate recycling or sale of zinc ash of each particle size grade, which is beneficial to improving the economic benefit of zinc ash treatment. The zinc ash of each particle size grade is clearly classified, which can effectively reduce the blockage of the mesh of each level of the screen, and can effectively avoid the mixing of zinc ashes of different particle size grades.

[0005] The present application provides a five-stage zinc ash screening device, including a ball mill, a first screening mechanism, a second-stage vibrating screen, a screw conveyor, and a third-stage vibrating screen;

[0006] A first screening mechanism is installed at the discharge port of the ball mill in an inclined downward direction, a primary screen is installed at the bottom of the upper end of the screen box of the first screening mechanism, a discharge port at the lower end of the screen box of the first screening mechanism is connected to a primary discharge port, and a position below the primary screen on the screen box of the first screening mechanism is connected to the first discharge port;

[0007] The secondary vibrating screen is arranged below the first discharge port, a secondary screen is arranged inside the secondary vibrating screen, and the secondary vibrating screen is connected to the secondary discharge port at the discharge end of the secondary screen, the bottom of the screen box of the secondary vibrating screen is connected to the second discharge port at a position below the secondary screen, the screw conveyor is installed obliquely upward below the second discharge port, and the lower end feed port of the screw conveyor is connected to the second discharge port;

[0008] The three-stage vibrating screen is arranged below the upper discharge port of the screw conveyor, and a third-stage screen and a fourth-stage screen are arranged in sequence from top to bottom in the three-stage vibrating screen, and the three-stage vibrating screen is connected to a third-stage discharge port at the discharge end of the three-stage screen, and the three-stage vibrating screen is connected to a fourth-stage discharge port at the discharge end of the four-stage screen, and the bottom of the screen box of the three-stage vibrating screen is connected to a fifth-stage discharge port at a position below the four-stage screen;

[0009] The mesh apertures of the first-level screen, the second-level screen, the third-level screen, and the fourth-level screen decrease in sequence.

[0010] Optionally, in one scheme, a first-level ash hopper is provided below the first-level discharge port, a second-level ash hopper is provided below the second-level discharge port, a third-level ash hopper is provided below the third-level discharge port, a fourth-level ash hopper is provided below the fourth-level discharge port, and a fifth-level ash hopper is provided below the fifth-level discharge port.

[0011] Optionally, in one embodiment, the ends of the first-level discharge port, the second-level discharge port, the third-level discharge port, the fourth-level discharge port, and the fifth-level discharge port are all arranged at a height close to the upper opening of the box body of the corresponding ash hopper or partially extend into the box body of the corresponding ash hopper.

[0012] Optionally, in one embodiment, the discharge port of the ball mill is sealed and connected to the feed port of the first screening mechanism, the first discharge port is sealed and connected to the feed port of the secondary vibrating screen, the second discharge port is sealed and connected to the lower feed port of the screw conveyor, and the upper discharge port of the screw conveyor is sealed and connected to the feed port of the tertiary vibrating screen.

[0013] Beneficial effects of the utility model:

[0014] The utility model realizes fine screening of zinc ash by making zinc ash pass through a primary sieve, a secondary sieve, a tertiary sieve and a fourth sieve in sequence for four screenings, and can produce zinc ash of five particle sizes, which can effectively improve the consistency of the particle sizes of zinc ash of each particle size grade. The particle sizes of the five particle sizes of zinc ash are highly uniform, which is convenient for separately recycling or selling zinc ash of each particle size grade, and is beneficial to improving the economic benefit of zinc ash treatment; the zinc ash of each particle size grade is clearly classified, which can effectively reduce the situation that the mesh holes of each level of sieve are blocked, and is convenient for ensuring the screening performance of each level of sieve, so as to ensure the screening effect of each level of sieve, and can effectively avoid the mixing of zinc ashes of different particle size grades.

[0015] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. It is obvious that the drawings described below are only some embodiments of the utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 It is a schematic diagram of the overall structure and installation position in one embodiment of the present application.

[0018] The reference numerals in the figure are: 1, ball mill; 2, first screening mechanism; 3, second-level vibrating screen; 4, screw conveyor; 5, third-level vibrating screen; 6, first-level screen; 201, first-level discharge port; 202, first discharge port; 7, second-level screen; 301, second-level discharge port; 302, second discharge port; 8, third-level screen; 9, fourth-level screen; 501, third-level discharge port; 502, fourth-level discharge port; 503, fifth-level discharge port; 10, first-level ash hopper; 11, second-level ash hopper; 12, third-level ash hopper; 13, fourth-level ash hopper; 14, fifth-level ash hopper. DETAILED DESCRIPTION

[0019] The specific implementation methods of the present application are further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present application, but are not intended to limit the scope of the present application. Similarly, the following examples are only some embodiments of the present application rather than all embodiments, and all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of this application.

[0020] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0021] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0022] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0023] In the present application, the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0024] In the prior art, the two-stage screening method is used to screen zinc ash, but there are problems such as coarse zinc ash classification, not conducive to classification and recycling, and low economic benefits. In addition, there are problems such as unclear zinc ash particle size classification, uneven particle sizes of zinc ash of two particle size grades, which are easy to clog the mesh of the screen.

[0025] In view of the above problems, the present application makes improvements and innovations and proposes the following embodiments.

[0026] In some embodiments, see Figure 1 , a five-stage zinc ash screening device is provided, comprising a ball mill 1, a first screening mechanism 2, a secondary vibrating screen 3, a screw conveyor 4, and a third vibrating screen 5;

[0027] The first screening mechanism 2 is installed at the discharge port of the ball mill 1 at an angle downward, a primary screen 6 is installed at the bottom of the upper end of the screen box of the first screening mechanism 2, the discharge port at the lower end of the screen box of the first screening mechanism 2 is connected to a primary discharge port 201, and the position below the primary screen 6 on the screen box of the first screening mechanism 2 is connected to a first discharge port 202. In this way, the zinc ash discharged after grinding and crushing by the ball mill 1 can be screened for the first time by the primary screen 6 installed in the first screening mechanism 2, so that the component with the largest particle size in the zinc ash is filtered by the primary screen 6 and discharged from the primary discharge port 201 to form the primary zinc ash, while the zinc ash with a particle size smaller than the aperture of the primary screen 6 passes through the primary screen 6 and enters the downstream screening mechanism from the first discharge port 202 for subsequent screening.

[0028] The secondary vibration screen 3 is arranged below the first discharge port 202, a secondary screen 7 is arranged inside the secondary vibration screen 3, and the secondary vibration screen 3 is connected to the secondary discharge port 301 at the discharge end of the secondary screen 7, the bottom of the screen box of the secondary vibration screen 3 is located below the secondary screen 7 and is connected to the second discharge port 302, the screw conveyor 4 is installed obliquely upward below the second discharge port 302, and the lower end feed port of the screw conveyor 4 is connected to the second discharge port 302. In this way, the zinc ash after the first screening of the primary screen 6 can be screened for the second time by the secondary screen 7 installed in the secondary vibration screen 3, so that the zinc ash with a particle size larger than the aperture of the secondary screen 7 is filtered by the secondary screen 7 and discharged from the secondary discharge port 301 to form the secondary zinc ash, while the zinc ash with a particle size smaller than the aperture of the secondary screen 7 passes through the secondary screen 7 and falls to the bottom of the screen box of the secondary vibration screen 3, and then enters the screw conveyor 4 from the second discharge port 302, and then is sent to the downstream screening mechanism through the screw conveyor 4 for subsequent screening.

[0029] The three-stage vibrating screen 5 is arranged below the upper discharge port of the screw conveyor 4, and a three-stage screen 8 and a four-stage screen 9 are arranged in sequence from top to bottom in the three-stage vibrating screen 5, and the three-stage vibrating screen 5 is connected to a three-stage discharge port 501 at the discharge end of the three-stage screen 8, and is connected to a four-stage discharge port 502 at the discharge end of the four-stage screen 9, and the bottom of the screen box of the three-stage vibrating screen 5 is located below the four-stage screen 9 and is connected to a five-stage discharge port 503. In this way, the zinc ash that has been screened twice by the secondary screen 7 can be screened for the third time by the third-level screen 8 installed in the third-level vibrating screen 5, so that the zinc ash with a particle size larger than the aperture of the third-level screen 8 is filtered by the third-level screen 8 and discharged from the third-level discharge port 501 to form third-level zinc ash, while the zinc ash with a particle size smaller than the aperture of the third-level screen 8 passes through the third-level screen 8 and falls onto the fourth-level screen 9, and then the zinc ash that has been screened three times by the fourth-level screen 9 is screened for the fourth time by the fourth-level screen 9, so that the zinc ash with a particle size larger than the aperture of the fourth-level screen 9 is filtered by the fourth-level screen 9 and discharged from the fourth-level discharge port 502 to form fourth-level zinc ash, while the zinc ash with a particle size smaller than the aperture of the fourth-level screen 9 passes through the fourth-level screen 9 and falls to the bottom of the screen box of the third-level vibrating screen 5, and then is discharged from the fifth-level discharge port 503 at the bottom of the screen box of the third-level vibrating screen 5 to produce fifth-level zinc ash.

[0030] The mesh apertures of the primary sieve 6, the secondary sieve 7, the tertiary sieve 8, and the quaternary sieve 9 decrease in sequence. Optionally, a primary ash hopper 10 is arranged below the primary discharge port 201, a secondary ash hopper 11 is arranged below the secondary discharge port 301, a third ash hopper 12 is arranged below the third discharge port 501, a fourth ash hopper 13 is arranged below the fourth discharge port 502, and a fifth ash hopper 14 is arranged below the fifth discharge port 503, so that the primary ash hopper 10, the secondary ash hopper 11, the third ash hopper 12, the fourth ash hopper 13, and the fifth ash hopper 14 can respectively collect and store the five levels of zinc ash of five particle sizes discharged from the primary discharge port 201, the secondary discharge port 301, the third ash hopper 501, the fourth discharge port 502, and the fifth discharge port 503 after four screenings.

[0031] In this way, the zinc ash discharged after being ground and crushed by the ball mill 1 is screened four times in sequence through the first-level screen 6, the second-level screen 7, the third-level screen 8, and the fourth-level screen 9 with successively decreasing mesh apertures, thereby achieving fine screening of the zinc ash and producing zinc ash of five particle sizes, thereby effectively improving the consistency of the particle sizes of the zinc ash of each particle size grade. The particle sizes of the five particle sizes of zinc ash are highly uniform, and thus it is convenient to separately recycle or sell the zinc ash of each particle size grade, which is beneficial to improving the economic benefit of zinc ash treatment. Specifically, the first-level zinc ash can be directly returned to the zinc alloy system to produce alloys, the second-level zinc ash can be returned to the zinc alloy system to produce alloys or returned to the zinc powder system to produce zinc powder according to the impurity conditions, the third-level zinc ash can be returned to the zinc powder system to produce zinc powder, the fourth-level zinc ash can be returned to the zinc powder system to produce zinc powder or sold according to the impurity conditions, and the fifth-level zinc ash can be directly sold.

[0032] In addition, by setting the first-level sieve 6, the second-level sieve 7, the third-level sieve 8, and the fourth-level sieve 9 to screen the zinc ash four times, the classification of zinc ash of each particle size grade is clear, which effectively improves the particle size uniformity of zinc ash of each particle size grade, thereby effectively reducing the blockage of the mesh holes of each level of the sieve, facilitating the guarantee of the screening performance of the sieve at each level, so as to ensure the screening effect of the sieve at each level, avoid the mixing of zinc ash of different particle size grades, and effectively guarantee the screening effectiveness of zinc ash of each particle size grade.

[0033] In some embodiments, see Figure 1 , the ends of the first-level discharge port 201, the second-level discharge port 301, the third-level discharge port 501, the fourth-level discharge port 502, and the fifth-level discharge port 503 are all arranged at a height close to the upper opening of the box body of the corresponding ash hopper or partially extend into the box body of the corresponding ash hopper, so as to reduce the falling height of zinc ash of each particle size after being discharged from the corresponding discharge port, thereby avoiding the problem of zinc ash scattering due to excessive falling height of zinc ash, so as to ensure that zinc ash of each particle size grade accurately falls into the corresponding ash hopper. Specifically, in the present application, the ends of the first-level discharge port 201, the second-level discharge port 301, the third-level discharge port 501, the fourth-level discharge port 502, and the fifth-level discharge port 503 are all arranged at a height position slightly higher than the upper opening of the box body of the corresponding ash hopper, so as to maximize the storage capacity of the ash hopper while ensuring that the zinc ash is prevented from scattering.

[0034] In some embodiments, see Figure 1 The discharge port of the ball mill 1 is sealed and connected with the feed port of the first screening mechanism 2, the first feed port 202 is sealed and connected with the feed port of the secondary vibration screen 3, the second feed port 302 is sealed and connected with the lower feed port of the screw conveyor 4, and the upper discharge port of the screw conveyor 4 is sealed and connected with the feed port of the tertiary vibration screen 5, so that the connecting channel between adjacent screening mechanisms or transportation mechanisms is in an outer sealed state, thereby ensuring that zinc ash is accurately delivered and transported between adjacent screening mechanisms or transportation mechanisms, so as to avoid zinc ash falling out of the connecting channel and causing zinc ash waste or mixing with zinc ash of other particle sizes.

[0035] Finally, it should be noted that although the embodiments of the utility model have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the utility model. Ordinary technicians in the field can make changes, modifications, substitutions and variations to the above embodiments within the scope of the utility model, which should all be included in the scope of protection of this application.

Claims

1. A five-stage zinc ash screening device, characterized in that: The five-stage zinc ash screening device comprises a ball mill (1), a first screening mechanism (2), a second-stage vibrating screen (3), a screw conveyor (4), and a third-stage vibrating screen (5); A first screening mechanism (2) is installed at a downwardly inclined position at the discharge port of the ball mill (1); a primary screen (6) is installed at the bottom of the upper end of the screen box of the first screening mechanism (2); a discharge port at the lower end of the screen box of the first screening mechanism (2) is connected to a primary discharge port (201); and a first discharge port (202) is connected to the screen box of the first screening mechanism (2) at a position below the primary screen (6); The secondary vibrating screen (3) is arranged below the first discharge port (202), a secondary screen (7) is arranged inside the secondary vibrating screen (3), and the secondary vibrating screen (3) is connected to a secondary discharge port (301) at the discharge end of the secondary screen (7), the bottom of the screen box of the secondary vibrating screen (3) is located below the secondary screen (7) and is connected to a second discharge port (302), the screw conveyor (4) is installed tilted upward below the second discharge port (302), and the lower end feed port of the screw conveyor (4) is connected to the second discharge port (302); The three-stage vibrating screen (5) is arranged below the upper discharge port of the screw conveyor (4), and a three-stage screen (8) and a four-stage screen (9) are arranged in sequence from top to bottom in the three-stage vibrating screen (5), and the three-stage vibrating screen (5) is connected to a three-stage discharge port (501) at the discharge end of the three-stage screen (8), and the three-stage vibrating screen (5) is connected to a four-stage discharge port (502) at the discharge end of the four-stage screen (9), and the bottom of the screen box of the three-stage vibrating screen (5) is connected to a five-stage discharge port (503) at a position below the four-stage screen (9); The mesh apertures of the first-level sieve (6), the second-level sieve (7), the third-level sieve (8), and the fourth-level sieve (9) decrease in sequence.

2. A five-stage zinc ash screening device according to claim 1, characterized in that: A first-level ash hopper (10) is arranged below the first-level discharge port (201), a second-level ash hopper (11) is arranged below the second-level discharge port (301), a third-level ash hopper (12) is arranged below the third-level discharge port (501), a fourth-level ash hopper (13) is arranged below the fourth-level discharge port (502), and a fifth-level ash hopper (14) is arranged below the fifth-level discharge port (503).

3. A five-stage zinc ash screening device according to claim 2, characterized in that: The ends of the first-level discharge port (201), the second-level discharge port (301), the third-level discharge port (501), the fourth-level discharge port (502), and the fifth-level discharge port (503) are all arranged at the height close to the upper opening of the box body of the corresponding ash hopper or partially extend into the box body of the corresponding ash hopper.

4. A five-stage zinc ash screening device according to claim 1 or 3, characterized in that: The discharge port of the ball mill (1) is sealed and connected to the feed port of the first screening mechanism (2), the first feed port (202) is sealed and connected to the feed port of the secondary vibration screen (3), the second feed port (302) is sealed and connected to the lower feed port of the screw conveyor (4), and the upper discharge port of the screw conveyor (4) is sealed and connected to the feed port of the tertiary vibration screen (5).

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