Screening device for zinc slag

Abstract

Screening device for zinc slag, characterized in that it comprises: a bracket (1), wherein a slide rail (16) is formed on the bracket (1), wherein a motor (11) and a rotary shaft seat (12) are connected to the bracket (1), wherein a pulley (13) and a drive wheel (14) are connected by a rotary shaft to the rotary shaft seat (12) inside, wherein a connecting shaft (15) is formed on a wheel surface of the drive wheel (14), wherein the motor (11) is connected to the pulley (13) via a belt transmission; and a screening mechanism, the screening mechanism comprising a receiving hopper (31), a first mesh screen (32), a second mesh screen (33), a side suction cover (34), and an upper dust cover (35), the receiving hopper (31) being provided with rollers (36) on a lower side, the receiving hopper (31) being connected to the first mesh screen (32), the first mesh screen (32) being connected to a second mesh screen (33), the second mesh screen (33) being provided with an upper dust cover (35) on an upper side, the side suction cover (34) being provided on a side surface formed by the connection of the receiving hopper (31), the first mesh screen (32), and the second mesh screen (33); a rotating shaft being provided at one end of the lower side of the receiving hopper (31); and a connecting rod (2); wherein the rollers (36) are connected to the slide rail (16), wherein the connecting rod (2) is mounted on the connecting shaft (15) and rotatably connected thereto, wherein another end of the connecting rod (2) is rotatably connected to the rotary shaft.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of screening plants, in particular a screening device for zinc slag. STATE OF THE ART

[0002] In hot-dip galvanizing, a solid melt of zinc and alpha iron (body core) forms at the interface when an iron workpiece is immersed in molten zinc. Manufacturers typically use a temperature of 450 to 470°C to prevent deformation of the workpiece at high temperatures and minimize zinc slag due to iron loss. This process produces zinc slag, which usually floats on the surface of the molten zinc. Zinc slag is mainly formed when the workpiece is immersed in the zinc bath in the zinc pot and usually floats on the surface of the molten zinc and is manually skimmed off. The composition of zinc slag is complex and mainly contains Zn, ZnO, and other substances, but can also contain SiO2, Fe 2+ , CD 2+ , Mn 2+and other impurities. Furthermore, ammonium chloride and zinc chloride are commonly used as co-solvents in the galvanizing process, which inevitably dissolves zinc chloride, zinc oxide, and zinc particles when collecting zinc flotsam, forming a mixture.

[0003] Because the zinc chloride used in galvanizing is corrosive and highly toxic, zinc slag is generally considered toxic and dangerous. At the same time, the metallic zinc powder contained in zinc slag is flammable when it comes into contact with water. The zinc ash processing and separation process has a high temperature and often spontaneously combusts when multiplying, which is very dangerous. And in the zinc slag sorted zinc particles in the smelting process, lead, cadmium and other elements are easy to exceed the standard, resulting in secondary pollution and increasing the cost of environmental risk control. Therefore, some solid waste disposal businessmen believe that zinc slag should be hazardous waste. Therefore, when screening zinc slag, it should be treated as hazardous materials. Conventional screening devices are not suitable for this purpose and can easily pose a safety hazard. CONTENT OF THE PRESENT INVENTION

[0004] In order to solve or partially solve a problem in the prior art, the present application provides a screening device for zinc slag that can reduce a safety risk in the screening process.

[0005] The present application discloses a screening device for zinc slag, comprising: a bracket, wherein a slide rail is formed on the bracket, wherein a motor and a rotary shaft seat are connected to the bracket, wherein a pulley and a drive wheel are connected by a rotary shaft to the rotary shaft seat inside, wherein a connecting shaft is formed on a wheel surface of the drive wheel, wherein the motor is connected to the pulley via a belt transmission; and a screening mechanism, the screening mechanism comprising a receiving hopper, a first mesh screen, a second mesh screen, a side suction cover, and an upper dust cover, the receiving hopper being provided with rollers on a lower side, the receiving hopper being connected to the first mesh screen, the first mesh screen being connected to a second mesh screen, the second mesh screen being provided with an upper dust cover on an upper side, the side suction cover being provided on a side surface formed by the connection of the receiving hopper, the first mesh screen, and the second mesh screen; a rotating shaft being provided at one end of the lower side of the receiving hopper; and a connecting rod; wherein the rollers are connected to the slide rail, wherein the connecting rod is mounted on the connecting shaft and rotatably connected thereto, wherein another end of the connecting rod is rotatably connected to the rotating shaft.

[0006] Optionally, the first mesh screen and the second mesh screen have a same structure and include an annular baffle, a baffle plate, a screen mesh, a connecting plate, a discharge port, and a dust removal screen, wherein the annular baffle is provided with an annular baffle plate on the bottom, a screen mesh is embedded and fixed in the baffle plate, a connecting plate is provided vertically above and below the annular baffle plate, a screw hole is formed on the connecting plate, through holes are formed at opposite ends of the annular baffle, one of the through holes is connected to the discharge port, while a dust removal screen covers the other of the through holes and is fixed thereto.

[0007] Optionally, the receiving hopper has the same structure as the first mesh screen and the second mesh screen, except that their bottom is sealed.

[0008] Optionally, the side suction cover is equipped with an air duct and connected to a vacuum dust remover.

[0009] Optionally, the upper dust cover is equipped with a feed pipe and connected to a material storage unit.

[0010] Optionally, the outlet opening is covered by a collecting funnel and is connected to a finished product storage unit via a pipe.

[0011] Optionally, the slide rail is inclined, with the angle of inclination being greater than 5 degrees and less than 15 degrees.

[0012] Optionally, the slide rail is conical, with the roller being a V-shaped wheel adapted to the conical slide rail.

[0013] Optionally, the supply pipe of the upper dust cover is provided at four-fifths of a length direction of the second mesh screen.

[0014] The technical solution provided by the present application may have the following advantageous effects: In the device, the material falls from the upper dust cover into the second mesh screen for the first screening, then again into the first mesh screen for the second screening, and finally into the receiving hopper for collection. The dust generated when the material falls into the screening mechanism and the dust generated during the screening process are covered by the upper dust cover and cannot escape. At the same time, it is sucked away by the side vacuum cover, so that no harmful dust is generated during screening, while at the same time the screened material is as dust-free as possible.

[0015] It is to be understood that the foregoing general description and the following detailed descriptions are exemplary and explanatory only and are not restrictive of the present application. SHORT DESCRIPTION OF THE DRAWING

[0016] The foregoing and other purposes, features, and advantages of the present application will become more apparent from a more detailed description of the exemplary embodiments of the present application when taken in conjunction with the accompanying drawings, in which the same reference numerals generally represent the same components throughout the exemplary embodiments of the present application. Fig. 1 shows a schematic representation of the structure according to an embodiment of the present application; Fig. 2 shows a plan view of a mesh screen according to an embodiment of the present application; Fig. 3 shows a side sectional view of the mesh screen according to an embodiment of the present application; Fig. 4 is a schematic representation of a connection between a slide rail and a slide wheel according to an embodiment of the present application. List of reference symbols:

[0017] 1. Bracket; 11. Motor; 12. Rotating shaft seat; 13. Belt pulley; 14. Drive wheel; 15. Connecting shaft; 16. Slide rail; 2. Connecting rod; 31. Receiving hopper; 32. First mesh screen; 33. Second mesh screen; 34. Side suction cover; 35. Upper dust cover; 36. Roller; 321. Annular baffle; 322. Baffle plate; 323. Screen mesh; 324. Connecting plate; 325. Discharge port; 326. Dust removal screen. DETAILED DESCRIPTION

[0018] Embodiments of the present application are described in more detail below with reference to the accompanying drawings. Although embodiments of the present application are shown in the accompanying drawings, it should be understood that the present application may be implemented in various forms without being limited to the embodiments shown herein. Rather, these embodiments are provided to make the present application more thorough and complete, and to enable those skilled in the art to fully appreciate the scope of the present application.

[0019] It should be understood that although terms such as "first," "second," "third," etc., may be used in the present application to describe various pieces of information, this information is not limited to these terms. These terms serve solely to distinguish information of the same type from one another. For example, without departing from the scope of the present application, information of the first type may also be referred to as information of the second type; analogously, information of the second type may also be referred to as information of the first type. Consequently, features marked "first" or "second" may explicitly or implicitly include one or more of these features. In the description of the present application, "a plurality of" means two or more, unless expressly defined otherwise.

[0020] In the description of the present application, it should be understood that the terms, e.g. "length", "width", "thickness", "top", "bottom", "front", "back", "left", "right", "vertical", "horizontal", "above", "below", "inside", "outside", indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the attached drawings, are used only for convenience and to simplify the description of the present application and do not indicate or imply that the device or element referred to has a particular orientation or must be constructed and operated with a particular orientation, and therefore should not be construed as limiting the present application.

[0021] In the description of the present application, it should be noted that the terms "assembled," "connected," and "attached," unless expressly stated and limited otherwise, are to be understood broadly, e.g., as either a fixed connection, a detachable connection, or a one-piece connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection via an intermediate medium; or a connection within two elements. The specific meaning of the above terms in the present application will be clear to a person skilled in the art.

[0022] In response to the above-mentioned problems, embodiments of the present application provide a screening device for zinc slag, and the technical solutions of the embodiments of the present application will be described in detail below in conjunction with the accompanying drawings.

[0023] As in Fig. 1 shows a screening device for zinc slag, which comprises: a bracket 1, wherein a slide rail 16 is formed on the bracket 1, wherein a motor 11 and a rotary shaft seat 12 are connected to the bracket 1, wherein a pulley 13 and a drive wheel 14 are connected by a rotary shaft to the rotary shaft seat 12 inside, A connecting shaft 15 is formed on a wheel surface of the drive wheel 14, and the motor 11 is connected to the pulley 13 via a belt transmission. The motor 11 rotates to rotate the pulley 13, so that the rotation is transmitted to the drive wheel 14 via a rotating shaft to rotate the drive wheel 14 and then drive the system.

[0024] The present application further includes a screening mechanism and a connecting rod 2. The screening mechanism includes a receiving hopper 31, a first mesh screen 32, a second mesh screen 33, a side suction cover 34, and an upper dust cover 35. The receiving hopper 31 is provided with rollers 36 on a lower surface, the receiving hopper 31 is connected to the first mesh screen 32, the first mesh screen 32 is connected to a second mesh screen 33, the second mesh screen 33 is provided with an upper dust cover 35 on an upper surface, the side suction cover 34 is provided on a side surface formed by the connection of the receiving hopper 31, the first mesh screen 32, and the second mesh screen 33; and a rotating shaft is provided at one end of the lower surface of the receiving hopper 31.

[0025] The rollers 36 are connected to the slide rail 16, wherein the connecting rod 2 is placed on the connecting shaft 15 and rotatably connected thereto, wherein another end of the connecting rod 2 is rotatably connected to the rotary shaft.

[0026] In the present application, the rotation of the drive gear 14 is transmitted to the screening mechanism via the connecting shaft 15. Since the screening mechanism as a whole is slidably connected to the slide rail 16 via the roller 36, the screening mechanism reciprocates with the rotation of the drive gear 14 to achieve screening. The material falls from the upper dust cover 35 into the second mesh screen 33 for the first screening, then again into the first mesh screen 32 for the second screening, and finally into the receiving hopper 31 for collection. In the present application, the number of layers and the size of the mesh screen holes can be adjusted according to the specific requirements of the screening fabric.The dust generated when the material falls into the screening mechanism and the dust generated during the screening process is covered by the upper dust cover 35 and cannot escape, and at the same time it is sucked away by the side suction cover 34, so that no harmful dust is generated during screening and at the same time the screened material is dust-free as much as possible.

[0027] In this application, to ensure the strength of the connection between the layers of the mesh screens and to facilitate the screening, but also to facilitate the collection of dust. As in Fig. 2 and Fig. 3, the first mesh screen 32 and the second mesh screen 33 have a similar structure and include an annular baffle 321, a baffle plate 322, a mesh 323, a connecting plate 324, an outlet port 325, and a dust removal screen 326. Specifically, the annular baffle 321 is a square annular enclosing groove.The annular baffle 321 is provided on the bottom with an annular baffle plate 321, a sieve mesh 323 is embedded and fixed above or in the baffle plate 322, a connecting plate 324 is provided vertically above and below the annular baffle 321, a screw hole is formed on the connecting plate 324, the upper and lower mesh sieves are firmly connected to each other with screws, through holes are formed at opposite ends of the annular baffle 321, one of the through holes is connected to the outlet port 325, while a dust removal sieve covers and is fixed to the other of the through holes. In this way, the dust of the poplar is collected while preventing the passage of material.At the same time, the receiving hopper has a same structure as the first mesh screen 32 and the second mesh screen 33, except that their bottom is sealed.

[0028] In this way, the entire screening mechanism is connected to the outside world at the side suction cover 34, except for the inlet and outlet points. During use, the side suction cover 34 is provided with an air duct and connected to a vacuum dust remover, the upper dust cover 35 is provided with a feed pipe and connected to a material storage tank, and the outlet opening 325 is covered by a collection hopper and is connected to a finished product storage tank via a pipe. The system is in a relatively sealed state during operation and replaces vibrating screening with a collection of reciprocating screens, i.e., to reduce dust generation, but also to pump out the inevitable dust generation, so that the entire screening is clean and there are no leaks that endanger the health of the personnel.

[0029] In one embodiment, to facilitate screening and rolling of the material, the slide rail 16 is inclined, with the inclination angle being greater than 5 degrees and less than 15 degrees, in particular selected as 7 degrees or 8 degrees. This angle satisfies the natural rolling sifting of the material during screening and prevents it from rolling as quickly and being sifted, but can also reduce the tensile strength of the connecting rod 2.

[0030] In another embodiment, as in Fig. As shown in Figure 1, the supply pipe of the upper dust cover 25 is provided at four-fifths or three-quarters of a length direction of the second mesh screen. This not only ensures that the dust generated during supply can be adsorbed, but also prevents the accumulation of falling material that blocks the dust removal screen 326.

[0031] In an embodiment, as in Fig. 4, the slide rail is conical, the roller is a V-shaped roller that is adapted to the conical slide rail, in this way it is easy to position and slide.

[0032] Finally, it is also important to point out that, in this document, relationships such as "first" and "second," etc., are among the terms used merely to distinguish one entity or operation from another, without necessarily requiring or implying the existence of any such actual relationship or sequence between those entities or operations. Furthermore, the terms "have," "comprise," or any other variation are intended to cover a non-exclusive inclusion, such that a process, procedure, object, or device comprising a series of elements includes not only those elements, but also other elements not expressly listed or pertaining to such a process, procedure, object, or device.

[0033] The units represented as separate components may or may not be physically separated, and the components represented as units may or may not be physical units, i.e., they may be located in one location or distributed across a plurality of network units. Some or all of these units may be selected as needed to fulfill the purpose of the technical solutions of the present embodiment.

[0034] Various embodiments of the present application have been described above, and the foregoing description is exemplary and not exhaustive, and is not limited to the disclosed embodiments. Without departing from the scope and spirit of the illustrated embodiments, many modifications and changes will be apparent to those skilled in the art. The terminology used herein has been chosen to best explain the principles, practical applications, or improvements in technology in the market for the embodiments, or to enable others skilled in the art to understand the disclosed embodiments.

Claims

[1] Screening device for zinc slag, characterized by that it includes: a bracket (1), wherein a slide rail (16) is formed on the bracket (1), wherein a motor (11) and a rotary shaft seat (12) are connected to the bracket (1), wherein a pulley (13) and a drive wheel (14) are connected by a rotary shaft to the rotary shaft seat (12) inside, wherein a connecting shaft (15) is formed on a wheel surface of the drive wheel (14), wherein the motor (11) is connected to the pulley (13) via a belt transmission; and a screening mechanism, the screening mechanism comprising a receiving hopper (31), a first mesh screen (32), a second mesh screen (33), a side suction cover (34), and an upper dust cover (35), the receiving hopper (31) being provided with rollers (36) on a lower side, the receiving hopper (31) being connected to the first mesh screen (32), the first mesh screen (32) being connected to a second mesh screen (33), the second mesh screen (33) being provided with an upper dust cover (35) on an upper side, the side suction cover (34) being provided on a side surface formed by the connection of the receiving hopper (31), the first mesh screen (32), and the second mesh screen (33); a rotating shaft being provided at one end of the lower side of the receiving hopper (31); and a connecting rod (2); wherein the rollers (36) are connected to the slide rail (16), wherein the connecting rod (2) is mounted on the connecting shaft (15) and rotatably connected thereto, wherein another end of the connecting rod (2) is rotatably connected to the rotary shaft. [2] Screening device for zinc slag according to claim 1, characterized bythat the first mesh screen (32) and the second mesh screen (33) have a similar structure and comprise an annular baffle edge (321), a baffle plate (322), a screen mesh (323), a connecting plate (324), an outlet opening (325) and a dust removal screen (326), wherein the annular baffle edge (321) is provided on the underside with an annular baffle plate (321), wherein a screen mesh (323) is embedded and fixed in the baffle plate (322), wherein a connecting plate (324) is provided vertically above and below the annular baffle plate (321), wherein a screw hole is formed on the connecting plate (324), wherein through holes are formed at opposite ends of the annular baffle edge (321), wherein one of the through holes is connected to the outlet opening (325), while a dust removal screen covers the other of the through holes and is fixed thereto is attached. [3] Screening device for zinc slag according to claim 2, characterized by that the receiving hopper has a similar structure to the first mesh screen (32) and the second mesh screen (33), except that their bottom is sealed. [4] Screening device for zinc slag according to claim 1, characterized by that the side suction cover (34) is provided with an air duct and connected to a vacuum dust remover. [5] Screening device for zinc slag according to claim 1, characterized by that the upper dust cover (35) is provided with a feed pipe and is connected to a material storage. [6] Screening device for zinc slag according to claim 2, characterized by that the outlet opening (325) is covered by a collecting funnel and is connected via a line to a finished product storage unit. [7] Screening device for zinc slag according to claim 1, characterized bythat the slide rail (16) is inclined, the angle of inclination being greater than 5 degrees and less than 15 degrees. [8] Screening device for zinc slag according to claim 0.85 or 1, characterized by that the slide rail (16) is conical, wherein the roller (36) is a V-shaped wheel adapted to the conical slide rail. [9] Screening device for zinc slag according to claim 1 or 11, characterized by that the supply pipe of the upper dust cover (35) is provided at four-fifths of a length direction of the second mesh screen.

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