Filter for wet-process zinc metallurgy

Abstract

The invention discloses a filter for wet-process zinc metallurgy, and relates to the technical field of filters. Comprising a main body, the main body is provided with a feeding port, the lower side of the main body is provided with a slag discharging port, the main body is fixedly connected with a liquid discharging pipe, the liquid discharging pipe is fixedly connected with a plurality of filter plates which are located in the main body and distributed at equal intervals, and the filter plates are communicated with the liquid discharging pipe; the main ring is arranged in the main body, an auxiliary ring is arranged at the position, close to the main ring, in the main body, and scraping plates rotationally connected with the main ring are arranged on the two sides of the filter plate. The scraper is used for scraping redundant filter cakes on the surface of the filter plate during operation of the plate filter, on one hand, shutdown for cleaning is not needed, cleaning steps are reduced, on the other hand, the remaining filter cakes on the surface of the filter plate are used for directly filtering subsequent leaching liquid and purification liquid, waiting for regeneration of the filter cakes is not needed, the production process does not need to be interrupted, and the production efficiency is improved. And the system continuity is high, and meanwhile the overall metallurgy efficiency is high.

Description

Technical Field

[0001] The invention relates to the technical field of filters, in particular to filters for wet zinc metallurgy. Background Art

[0002] Hydrometallurgy is a process of extracting metallic zinc from zinc ore by wet chemical methods. It has the characteristics of low energy consumption, strong environmental friendliness, and suitability for processing low-grade and complex ores. Its process flow mainly includes ore preparation, roasting, leaching, solution purification, electrolytic deposition, smelting and resource recovery. In the leaching and solution purification process, a plate filter is required to separate the solid and liquid of the leachate and the purified liquid. The equipment relies on the filter plate inside it to intercept solid particles. The liquid components in the leachate and the purified liquid pass through the filter plate and are discharged, while the solid particles gradually adhere to the surface of the filter plate under the action of the pressure difference to form a filter cake. The plate filter mainly utilizes the dual filtering effect of the filter plate and the filter cake to separate the solid-liquid of the leachate and the purified liquid. However, as the plate filter is used for a longer time, the thickness of the filter cake gradually increases, which increases the force required for the liquid to pass through the filter cake, causing the internal pressure of the equipment to increase and the filtration efficiency to decrease. At this time, the filter plate needs to be cleaned. The existing cleaning process mainly uses the shutdown operation method, that is, after shutdown, the filter cake is separated from the filter plate by vibration, backwashing and other methods. However, this method requires the filter cake layer to be re-established after the equipment is restarted, resulting in an interruption of the production process, which not only affects the continuity of the system operation, but also leads to low overall metallurgical efficiency. Summary of the invention

[0003] The present invention provides a filter for wet zinc metallurgy to overcome the shortcomings of the existing cleaning method of plate filters used in the wet zinc metallurgy process, such as production process interruption, poor system operation continuity and low overall metallurgical efficiency.

[0004] The technical implementation scheme of the present invention is: a filter for hydrometallurgy of zinc, comprising: A main body, wherein the main body is provided with a feed inlet, a slag discharge port is provided at the lower side of the main body, a liquid discharge pipe is fixedly connected to the main body, the liquid discharge pipe passes through the main body and is fixedly connected with a plurality of filter plates located in the main body and distributed at equal intervals, and the filter plates are connected to the liquid discharge pipe; A main ring is arranged in the main body, a secondary ring is arranged in the main body near the main ring, scrapers rotatably connected to the main ring are arranged on both sides of the filter plate, the scrapers are limited and slidably connected to the secondary ring, the scrapers are limited and slidably connected to a positioning column limited and slidably connected to the main ring, the positioning column is rotatably connected to the secondary ring, and the scraper is used to thin the filter cake adhered to the surface of the adjacent filter plate.

[0005] Furthermore, the main body is sealingly and slidingly connected to two clamping columns, both of which pass through the main body and contact the main ring and the secondary ring, and the clamping columns are used to drive the main ring and the secondary ring to move. The main body is equipped with a cleaning push rod, and the telescopic end of the cleaning push rod is fixedly connected to one end of the two clamping columns away from the main ring.

[0006] Furthermore, a secondary adjustment shaft is rotatably connected to a position near the main ring in the clamping column, and the secondary adjustment shaft and the secondary ring are driven by a gear rack. A main adjustment part rotatably connected to the secondary adjustment shaft is rotatably connected in the clamping column, and the main adjustment part and the main ring are driven by a gear rack.

[0007] Furthermore, the auxiliary adjustment shaft and the main adjustment component are slidably connected with an extrusion column on one side away from the main ring, and a first spring is fixedly connected between the auxiliary adjustment shaft and the main adjustment component and the adjacent extrusion columns respectively. A plurality of limit grooves are arranged in the clamping column near the auxiliary adjustment shaft, and the limit grooves are used to limit the adjacent extrusion columns.

[0008] Furthermore, two extrusion cylinders are fixedly connected in the main body at a position away from the main ring, and the extrusion cylinders are used to extrude two adjacent extrusion columns on adjacent clamping columns and release the limiting relationship between the extrusion columns and the adjacent limiting grooves. A guide cylinder is fixedly connected in the extrusion cylinder, and the guide cylinder is used to extrude two adjacent extrusion columns on adjacent clamping columns and rotate the secondary adjustment shaft and the main adjustment member.

[0009] Furthermore, it also includes shearing components equal in number to the scrapers, which are respectively arranged on adjacent scrapers to assist the scrapers in cutting the filter cakes. The shearing components include: A connecting rod is slidably connected in the scraper, the connecting rod is fixedly connected with a sliding column, the sliding column is slidably connected to the scraper, and a second spring is fixedly connected between the two; A cutting bar is fixed to the connecting rod and is limitedly slidably connected to the scraper, the scraper is provided with a plurality of stationary teeth, and the cutting bar is provided with a plurality of movable teeth; The wave cylinder is fixed in the main body, and one end of the sliding column away from the adjacent connecting rod contacts the wave cylinder, and the wave cylinder is used to make the sliding column reciprocate.

[0010] Furthermore, the stationary teeth and the movable teeth are respectively located at the lower side of the adjacent scraper and the adjacent cutting strip.

[0011] Furthermore, a guide shell is fixedly connected to one side of the scraper away from the adjacent filter plate, and the guide shell is used to change the moving trajectory of the removed part of the filter cake.

[0012] Furthermore, it also includes: The flow divider is fixedly connected to a position in the main body close to the feed inlet, and the flow divider is used to disperse the fluid entering the main body from the feed inlet.

[0013] Furthermore, a slag discharge piece is sealingly and slidably connected in the slag discharge port, a slag discharge push rod is installed in the main body, and a telescopic end of the slag discharge push rod is fixedly connected to the slag discharge piece.

[0014] The advantages and positive effects of the present invention compared with the prior art are: the present invention utilizes a scraper to scrape off excess filter cake on the surface of the filter plate during the operation of the plate filter. On the one hand, there is no need to stop the machine for cleaning, thus reducing the cleaning steps; on the other hand, the filter cake remaining on the surface of the filter plate is used to directly filter subsequent leachate and purified liquid, without waiting for the filter cake to be regenerated and without interrupting the production process. The system has high continuity and high overall metallurgical efficiency.

[0015] The guide tube is used to adjust the gap between the scraper and the filter plate, so that the device can adapt to various usage scenarios and improve the application range of the device.

[0016] The filter cake containing colloid (the filter cake of the leachate contains ferric hydroxide colloid) is sheared by the reciprocating offset movement of the moving teeth and the stationary teeth, thereby reducing the probability of the filter cake tearing, maintaining the flatness of the filter cake surface, and thus maintaining the subsequent filtering effect of the filter cake on the leachate and the purified liquid.

[0017] The slag discharge piece is used to realize intermittent discharge, so that the excess filter cake in the main body can be discharged without stopping the main body, and the influence of the discharge process on the pressure in the main body can be reduced, so as to keep the filtration efficiency of the device stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the three-dimensional structure of the filter plate, the main ring and the auxiliary ring of the present invention; Figure 3 It is a schematic diagram of the three-dimensional structure of the liquid discharge pipe, the filter plate and the main ring of the present invention; Figure 4 It is a three-dimensional structural schematic diagram of the auxiliary ring, scraper and positioning column of the present invention; Figure 5 It is a schematic diagram of the three-dimensional structure of the scraper, sliding column and guide shell of the present invention; Figure 6 It is a three-dimensional structural cross-sectional view of the scraper and the positioning column of the present invention; Figure 7 It is a schematic diagram of the three-dimensional structure of the clamping column and the extrusion column of the present invention; Figure 8 It is a three-dimensional structural schematic diagram of the auxiliary adjustment shaft, the main adjustment member and the extrusion column of the present invention; Fig. 9 It is an exploded view of the clamping column, the auxiliary adjustment shaft and the main adjustment part of the present invention; Fig.10 It is a three-dimensional structural schematic diagram of the extrusion cylinder and the guide cylinder of the present invention; Fig.11 It is a three-dimensional structural schematic diagram of the connecting rod, sliding column and cutting strip of the present invention; Fig.12 It is a schematic diagram of the three-dimensional structure of the filter plate, scraper and guide shell of the present invention.

[0019] The markings of the components in the accompanying drawings are as follows: 1-main body, 101-feed port, 102-slag discharge port, 2-drain pipe, 3-filter plate, 4-main ring, 5-auxiliary ring, 6-scraper, 601-static tooth, 7-positioning column, 8-clamping column, 9-cleaning push rod, 10-auxiliary adjustment shaft, 11-main adjustment part, 12-extrusion column, 121-limiting groove, 13-extrusion cylinder, 14-guide cylinder, 15-connecting rod, 16-sliding column, 17-cutting strip, 171-moving tooth, 18-wave cylinder, 19-guide shell, 20-diverter, 21-slag discharge part, 22-slag discharge push rod. DETAILED DESCRIPTION

[0020] Other features and advantages of the present invention will be described in the following description, and partly become obvious from the description, or be understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures pointed out in the description and the drawings.

[0021] Filters for hydrometallurgy, see Figure 1-Figure 6 , comprising: a main body 1, the main body 1 is provided with a feed port 101, a slag discharge port 102 is provided at the lower side of the main body 1, a discharge pipe 2 is fixedly connected to the main body 1, the discharge pipe 2 passes through the main body 1 and is fixedly connected with a plurality of filter plates 3 located in the main body 1 and distributed at equal intervals, the filter plates 3 are connected with the discharge pipe 2; a main ring 4 is arranged in the main body 1, a secondary ring 5 is arranged in the main body 1 near the main ring 4, scrapers 6 rotatably connected to the main ring 4 are arranged on both sides of the filter plate 3, and the scrapers 6 are limitedly slidably connected with the secondary ring 5 The scraper 6 is limitedly and slidably connected with a positioning column 7 which is limitedly and slidably connected with the main ring 4. The positioning column 7 is rotatably connected with the secondary ring 5. The scraper 6 is used to thin the filter cake adhered to the surface of the adjacent filter plate 3; the main body 1 is sealingly and slidably connected with two clamping columns 8. Both clamping columns 8 pass through the main body 1 and contact the main ring 4 and the secondary ring 5. The clamping columns 8 are used to drive the main ring 4 and the secondary ring 5 to move. The main body 1 is equipped with a cleaning push rod 9. The telescopic end of the cleaning push rod 9 is fixedly connected to the end of the two clamping columns 8 away from the main ring 4.

[0022] In the above scheme, the purpose is to solve the problems of production process interruption, poor system operation continuity and low overall metallurgical efficiency in the existing cleaning method of the plate filter used in the wet zinc metallurgical process; the present scheme uses the scraper 6 to scrape off the excess filter cake on the surface of the filter plate 3 during the operation of the plate filter. On the one hand, there is no need to stop the machine for cleaning, which reduces the cleaning steps. On the other hand, the filter cake remaining on the surface of the filter plate 3 is used to directly filter the subsequent leachate and purified liquid, without waiting for the filter cake to be regenerated, without interrupting the production process, the system continuity is high, and the overall metallurgical efficiency is high; the main body 1 is composed of a bracket, a cylinder and a cylinder cover The position of the feed port 101 can be adjusted according to actual conditions, and the feed port 101 is located at the lower part of the main body 1; the discharge pipe 2 is connected to the feed pipeline in the subsequent process through a flange; the number of filter plates 3 can be adjusted according to actual conditions, and the number of filter plates 3 in this article is six; a pressure sensor and a control terminal can be installed in the main body 1, the pressure sensor is used to monitor the pressure in the main body 1, and the control terminal is used to determine the thickness of the filter cake according to the pressure sensor reading; the control terminal is electrically connected to the cleaning push rod 9; the upper side of the filter plate 3 is fixed in the main body 1 through a connecting structure, and this connecting structure is an existing device and will not be described here.

[0023] The filter screen of the filter plate 3 is a multi-layer structure composed of various types of stainless steel wire meshes, and the pore size of the stainless steel wire meshes gradually decreases from the inside to the outside. The multi-layer design can ensure the filtration quality, improve the purity of the filtrate, reduce the pressure drop, reduce energy consumption and operation and maintenance costs, and the type and number of layers of the wire mesh can be selected according to actual conditions, so as to maximize the filtration capacity and filtration efficiency; the filter plate 3 is a frame structure as a whole, and is riveted, welded or bolted (not specifically shown in the attached drawings), which can ensure the stability and reliability of the structure even in high-pressure situations and reduce the probability of maintenance; the filter plate 3 can be made of 304L, 316L, 904L or special duplex steel, and can ensure good service life and stress corrosion resistance even in harsh application environments.

[0024] The two scrapers 6 corresponding to the same filter plate 3 are respectively located on the left and right sides thereof, and the rotation axes of the two scrapers 6 are respectively located on the front and rear sides of the adjacent filter plates 3, and the positioning column 7 is located on the side of the adjacent scraper 6 away from its rotation axis. In the normal direction of the filtering surface of the filter plate 3, the minimum distance between the two scrapers 6 and the adjacent filter plates 3 is equal. Initially, the gap between the scraper 6 and the adjacent filter plates 3 is the largest. The number of the clamping columns 8 can be adjusted according to actual conditions. In this article, the two clamping columns 8 jointly clamp the main ring 4 and the secondary ring 5.

[0025] See also Figure 1-Figure 3 , Figure 5 and Figure 7-10, the position of the clamping column 8 near the main ring 4 is rotatably connected with the auxiliary adjustment shaft 10, and the auxiliary adjustment shaft 10 and the auxiliary ring 5 are driven by a gear rack. The clamping column 8 is rotatably connected with a main adjustment member 11 rotatably connected with the auxiliary adjustment shaft 10, and the main adjustment member 11 and the main ring 4 are driven by a gear rack; the side of the auxiliary adjustment shaft 10 and the main adjustment member 11 away from the main ring 4 are slidably connected with an extrusion column 12, and the auxiliary adjustment shaft 10 and the main adjustment member 11 are respectively fixed with a first spring between the adjacent extrusion column 12, and the clamping column 8 near the auxiliary adjustment shaft 1 A plurality of limiting grooves 121 are provided at the position of 0, and the limiting grooves 121 are used to limit the adjacent extrusion columns 12; two extrusion cylinders 13 are fixedly connected at a position away from the main ring 4 in the main body 1, and the extrusion cylinders 13 are used to extrude the two adjacent extrusion columns 12 on the adjacent clamping columns 8 and release the limiting relationship between the extrusion columns 12 and the adjacent limiting grooves 121; a guide cylinder 14 is fixedly connected in the extrusion cylinder 13, and the guide cylinder 14 is used to extrude the two adjacent extrusion columns 12 on the adjacent clamping columns 8 and rotate the secondary adjustment shaft 10 and the main adjustment member 11.

[0026] In the above scheme, the guide tube 14 is used to adjust the gap between the scraper 6 and the filter plate 3, so that the device can adapt to a variety of usage scenarios (when the device is used to separate the leachate and the purified liquid into solids and liquids, due to the different solid particles in the leachate and the purified liquid, the density of the filter cake formed is different, that is, the thickness of the remaining filter cake required in the end is different), and the scope of application of the device is improved; the auxiliary adjustment shaft 10 is an L-shaped part composed of two mutually perpendicular connecting columns, and the main adjustment part 11 is an L-shaped part composed of a connecting column and a hollow stepped column, and there is a through groove on the upper part of the stepped column of the main adjustment part 11 for the connecting column of the auxiliary adjustment shaft 10 to slide; the transmission structure (that is, the gear rack) between the main adjustment part 11 and the main ring 4 and the auxiliary adjustment shaft 10 and the auxiliary ring 5 can be replaced according to actual usage, and the lower part of the clamping column 8 can be provided with a shell that is sealed and slidably connected to the main ring 4 and the auxiliary ring 5, and the shell is used to reduce the impact of solid particles in the leachate and the purified liquid on the main adjustment The gear rack between the part 11 and the main ring 4 and the gear rack between the auxiliary adjustment shaft 10 and the auxiliary ring 5; the end of the extrusion column 12 away from the central axis of the adjacent clamping column 8 is hemispherical; initially, the extrusion column 12 contacts with the adjacent limiting groove 121 and is limited by it under the action of the first spring inside it; the inner diameter of the extrusion cylinder 13 is smaller than the maximum distance between the extrusion column 12 and the central axis of the adjacent clamping column 8 in the direction of its central axis, and the difference between the above two is smaller than the radius of the hemisphere of the end face of the extrusion column 12, so that when the clamping column 8 drives the extrusion column 12 to move, the extrusion column 12 can squeeze the extrusion cylinder 13; the lower side of the guide cylinder 14 is an inclined surface, and the lowest point of the inclined surface of the guide cylinder 14 is located between two adjacent extrusion columns 12 on the adjacent clamping column 8; the position where the extrusion column 12 contacts the adjacent limiting groove 121 is a protrusion, and the edge of the protrusion can be provided with an inclined surface to facilitate the protrusion of the extrusion column 12 to enter the adjacent limiting groove 121.

[0027] See also Figure 1 and Figure 2 A slag discharge part 21 is sealingly and slidably connected in the slag discharge port 102 , and a slag discharge push rod 22 is installed on the main body 1 , and the telescopic end of the slag discharge push rod 22 is fixedly connected to the slag discharge part 21 .

[0028] In the above scheme, the purpose is to use the slag discharge part 21 to achieve intermittent discharge, so that the filter cake (hereinafter referred to as sludge) cut off in the main body 1 can be discharged without stopping the main body 1, and the influence of the discharge process on the pressure in the main body 1 can be reduced, so as to maintain the filtration efficiency of the device stable; the slag discharge part 21 is composed of a piston, a cone and a cylinder from top to bottom, wherein the piston is used to maintain the seal between the slag discharge part 21 and the slag discharge port 102, and the cone is used to guide the sludge between the cone and the piston to fall outside the main body 1, and micropores are provided on the surface of the cone, which are used to connect the space between the piston and the cone of the slag discharge part 21 with the outside world; the control terminal is electrically connected to the slag discharge push rod 22.

[0029] The working principle of the above scheme is as follows: in the process of wet zinc metallurgy, when a plate filter is used to separate the solid and liquid of the leaching solution and the purified liquid (hereinafter referred to as the above two liquids as fluids), the feed port 101 is connected to the liquid outlet pipe of the previous process; the fluid enters the main body 1 through the feed port 101, so that the liquid level in the main body 1 gradually rises, and at the same time, the original gas in the main body 1 is discharged through the filter plate 3 and the drain pipe 2. When the liquid level in the main body 1 gradually contacts the filter plate 3, the liquid component in the fluid in the main body 1 slowly enters the filter plate 3 under the action of gravity, and is discharged through the drain pipe 2. At the same time, the liquid level of the fluid in the main body 1 continues to rise until the liquid level of the fluid in the main body 1 submerges the filter plate 3. As the fluid is continuously transported into the main body 1, a pressure difference is generated between the inside of the main body 1 and the inside of the drain pipe 2 and the filter plate 3. At this time, the fluid flows to the filter plate 3. During internal flow, the filter plate 3 intercepts the solid particles in the fluid, and the solid particles accumulate on the left and right sides of the filter plate 3 to form a filter cake. The liquid components in the fluid enter the filter plate 3 and the drain pipe 2 in turn, and are finally discharged through the drain pipe 2. When the worker observes that the clarity of the liquid discharged from the drain pipe 2 meets the standard (determined according to the process requirements of hydrometallurgy), the worker records the time required from the fluid entering the main body 1 to the liquid discharged from the drain pipe 2 meeting the clarity standard, and calculates the thickness of the filter cake corresponding to the clarity of the liquid discharged from the drain pipe 2 when it meets the standard based on the concentration of solid particles in the fluid, the flow rate of the fluid, and the total area of ​​the filtering surfaces of the six filter plates 3 (hereinafter referred to as the initial thickness). The worker uses a flange to connect the drain pipe 2 with the liquid inlet pipe of the next process, and then starts the solid-liquid separation operation on the fluid.

[0030] During the operation of the device, as the use time increases, the thickness of the filter cake gradually increases, resulting in an increase in the force required for the liquid component to pass through the filter cake, which leads to an increase in the pressure in the main body 1. During the operation of the device, the control terminal reads the indication of the pressure sensor in real time, and judges the thickness of the filter cake by the indication of the pressure sensor. When it is judged that the filter cake on the filter plate 3 needs to be cleaned, the control terminal starts the cleaning push rod 9, the telescopic end of the cleaning push rod 9 extends, and drives the two clamping columns 8 to move up. The two clamping columns 8 jointly drive the main ring 4, the secondary ring 5, the secondary adjustment shaft 10, the main adjustment part 11 and the extrusion column 12 to move up together. The main ring 4 and the secondary ring 5 drive all the scrapers 6 to move up together. At this time, the gap between the scraper 6 and the adjacent filter plate 3 is at the maximum state, and the scraper 6 does not contact the filter cake during the upward movement.

[0031] In the process of the clamping column 8 driving the extrusion column 12 to move upward, the distance between the extrusion column 12 and the extrusion cylinder 13 gradually decreases, and finally the two contact (at this time, the height of the scraper 6 is greater than the height of the filter plate 3), and the extrusion column 12 is squeezed by the adjacent extrusion cylinder 13, so that the extrusion column 12 moves in the direction close to the central axis of the adjacent clamping column 8, and compresses the first spring in the extrusion column 12, and the extrusion column 12 loses contact with the adjacent limiting groove 121, and the limiting groove 121 on the adjacent extrusion column 12 is released. At this time, the extrusion column 12 contacts the inclined surface of the adjacent guide cylinder 14 during the upward movement, and moves along the inclined surface of the guide cylinder 14, so that the extrusion column 12 rotates around the central axis of the adjacent clamping column 8 while moving upward. The two extrusion columns 12 on the same clamping column 8 respectively drive the secondary adjustment shaft 10 and the main adjustment part 11 to rotate, and the secondary adjustment shaft 10 and the main adjustment part 11 respectively drive the main ring 4 to rotate clockwise and the secondary ring 5 to rotate counterclockwise through the gear rack (this article uses the Figure 1 The top view is the rotation perspective), the main ring 4 drives all the scrapers 6 close to the side of the rotation axis toward the adjacent filter plate 3, and the secondary ring 5 drives all the scrapers 6 to swing away from the side of the rotation axis through all the positioning columns 7 thereon, so that the scrapers 6 as a whole approach the adjacent filter plate 3, so that the gap between the scrapers 6 and the adjacent filter plates 3 is reduced until the gap between the two is equal to the initial thickness, and the control terminal controls the telescopic end of the cleaning push rod 9 to retract.

[0032] During the contraction of the telescopic end of the cleaning push rod 9, the telescopic end of the cleaning push rod 9 drives the two clamping columns 8 to move downward, and the clamping column 8 drives the main ring 4, the secondary ring 5, the secondary adjustment shaft 10, the main adjustment member 11 and the extrusion column 12 to move downward together. First, the extrusion column 12 loses contact with the inclined surface of the guide cylinder 14 and the extrusion cylinder 13 in turn, so that the extrusion column 12 moves away from the central axis of the adjacent clamping column 8 under the action of the first spring therein, and the extrusion column 12 contacts the corresponding limiting groove 121 at this time, and the limiting groove 121 limits the extrusion column 12, so that the secondary adjustment shaft 10 and the main adjustment member 11 are in the same position. The adjusting piece 11 cannot rotate, thereby locking the gap between the scraper 6 and the adjacent filter plate 3; as the scraper 6 moves downward, the scraper 6 contacts the filter cake on the surface of the adjacent filter plate 3, and cuts the filter cake from top to bottom, so that the thickness of the filter cake adhered to the surface of the filter plate 3 is reduced, and when the scraper 6 moves to the lowermost side of the adjacent filter plate 3, the cut-off part of the filter cake is completely disconnected from the remaining part of the filter cake on the surface of the adjacent filter plate 3. At this time, the control terminal controls the scraper 6 to move upward through the cleaning push rod 9 until the extrusion column 12 contacts the extrusion cylinder 13, and then stops cleaning the push rod 9, waiting for the next time to cut the filter cake.

[0033] After the excess filter cake (i.e., sludge) is scraped off by the scraper 6, the sludge falls in the main body 1 under the action of gravity and finally accumulates at the lower part of the main body 1 (i.e., the upper side of the piston of the slag discharge member 21). At this time, the control terminal controls the telescopic end of the slag discharge push rod 22 to contract, and the telescopic end of the slag discharge push rod 22 drives the slag discharge member 21 to move upward, so that the piston of the slag discharge member 21 moves out of the slag discharge port 102, and the piston of the slag discharge member 21 releases the blockage of the slag discharge port 102. The slag discharge port 102 is connected to the outside through the micropores of the upper truncated cone of the slag discharge member 21, so that a pressure difference is formed on the upper and lower sides of the upper truncated cone of the slag discharge member 21, so that the sludge accumulated at the slag discharge port 102 is pushed out. The mud falls to the conical surface of the slag discharge part 21 through the gap between the piston of the slag discharge part 21 and the main body 1. At this time, the control terminal controls the telescopic end of the slag discharge push rod 22 to extend and drive the slag discharge part 21 to move downward, so that the piston of the slag discharge part 21 blocks the slag discharge port 102 again. At the same time, the conical surface of the slag discharge part 21 gradually loses contact with the main body 1. At this time, the sludge located in the middle of the slag discharge part 21 falls out of the main body 1 through the gap between the conical surface of the slag discharge part 21 and the main body 1. Subsequently, the control terminal repeatedly repeats the steps of extending and retracting the telescopic end of the slag discharge push rod 22 to repeatedly discharge the sludge in the main body 1 and reduce the impact on the pressure inside the main body 1.

[0034] As the number of times the scraper 6 cuts off the filter cake on the filter plate 3 increases, the density of the filter cake that is always attached to the filter plate 3 gradually increases. The control terminal controls the extension distance of the telescopic end of the cleaning push rod 9, so that each time the filter cake is cut off, the gap between the scraper 6 and the adjacent filter plate 3 is gradually reduced. While maintaining the filtration efficiency of the filter cake and the filter plate 3 for the fluid, the excess filter cake is cut off to the greatest extent, reducing the number of times the scraper 6 cuts off the filter cake, thereby extending the service life of the device. After the metallurgy is completed, the worker discharges the fluid in the main body 1, opens the cylinder cover, and thoroughly cleans the filter plate 3, while controlling The extrusion column 12 is forced to extrude with the extrusion cylinder 13, and the extrusion column 12 loses contact with the adjacent limiting groove 121, and the extrusion column 12 is manually rotated to the initial state (to restore the angle formed by the two adjacent extrusion columns 12), and the above steps of driving the auxiliary adjustment shaft 10 and the main adjustment member 11 to rotate by the extrusion column 12 are repeated in reverse to reset the gap between the scraper 6 and the adjacent filter plate 3. Then the worker resets the cylinder cover and controls the telescopic end of the cleaning push rod 9 to retract and reset, and at the same time resets the clamping column 8, the main ring 4, the auxiliary ring 5, the scraper 6, the auxiliary adjustment shaft 10, the main adjustment member 11 and the extrusion column 12.

[0035] See also Figure 2-Figure 6 and Fig.11 , and also includes shearing components equal in number to the scraper 6, which are respectively arranged on adjacent scraper 6 to assist the scraper 6 in cutting the filter cake, and the shearing components include: a connecting rod 15, which is slidably connected in the scraper 6, and the connecting rod 15 is fixedly connected with a sliding column 16, and the sliding column 16 is slidably connected to the scraper 6, and a second spring is fixedly connected between the above two; a cutting bar 17, which is fixedly connected to the connecting rod 15 and is limitedly slidably connected to the scraper 6, the scraper 6 is provided with a plurality of static teeth 601, and the cutting bar 17 is provided with a plurality of dynamic teeth 171; a wave cylinder 18, which is fixedly connected in the main body 1, and one end of the sliding column 16 away from the adjacent connecting rod 15 contacts the wave cylinder 18, and the wave cylinder 18 is used to make the sliding column 16 reciprocate; the static teeth 601 and the dynamic teeth 171 are respectively located on the lower sides of the adjacent scraper 6 and the adjacent cutting bar 17.

[0036] In the above scheme, the purpose is to use the reciprocating offset movement of the movable teeth 171 and the stationary teeth 601 to shear the filter cake containing colloid (the filter cake of the leachate contains ferric hydroxide colloid), reduce the probability of filter cake tearing, maintain the surface flatness of the filter cake, and thus maintain the subsequent filtering effect of the filter cake on the leachate and the purified liquid; the end face of the sliding column 16 is hemispherical, which is used to reduce the friction force when the sliding column 16 slides along the wave cylinder 18; the inner side of the wave cylinder 18 is wavy, which is used to make the sliding column 16 reciprocate when the sliding column 16 slides along the inner side of the wave cylinder 18; the stationary teeth 601 and the movable teeth 171 are respectively located on the lower side of the adjacent scraper 6 and the adjacent cutting strip 17, which are used to make the scraper 6 cut the filter cake from top to bottom, reduce the contact between the cut filter cake and the residual filter cake on the filter plate 3, and maintain the integrity of the residual filter cake on the filter plate 3.

[0037] The working principle of the above scheme is as follows: when the scraper 6 moves, the scraper 6 drives the connecting rod 15, the sliding column 16 and the cutting strip 17 to move together. During this process, the sliding column 16 slides along the wave surface inside the wave cylinder 18, so that the sliding column 16 is reciprocatingly squeezed, and the sliding column 16 drives the cutting strip 17 to move back and forth through the connecting rod 15, and reciprocatingly compresses the second spring of the sliding column 16, so that the movable teeth 171 on the cutting strip 17 and the static teeth 601 on the adjacent scraper 6 are reciprocally displaced and then reset, and the reciprocating displaced movement of the movable teeth 171 and the static teeth 601 is used to shear the filter cake, thereby reducing the probability of uneven filter cake surface caused by directly scraping off the filter cake, and maintaining the effect of residual filter cake on the filter plate 3 to separate the fluid into solid and liquid.

[0038] See also Figure 2 , Figure 4 , Figure 5 and Fig.12 A guide shell 19 is fixedly connected to the side of the scraper 6 away from the adjacent filter plate 3, and the guide shell 19 is used to change the moving trajectory of the removed part of the filter cake; the diverter 20 is fixedly connected to a position near the feed port 101 in the main body 1, and the diverter 20 is used to disperse the fluid entering the main body 1 from the feed port 101.

[0039] In the above scheme, the filter cake cut by the scraper 6 is guided by the guide shell 19, so that the cut filter cake moves downward with the scraper 6, and the probability of the cut filter cake continuing to block the remaining filter cake on the filter plate 3 under the action of the pressure difference is reduced, so that the difficulty of the liquid component passing through the filter cake on the filter plate 3 is quickly restored to the initial state, and the solid-liquid separation efficiency of the device for the fluid is maintained; the diverter 20 is used to divert the fluid transported to the main body 1, reduce the impact of the flow of the fluid on the sludge accumulated in the main body 1, maintain the stability of the sludge accumulated in the main body 1, and reduce The sludge in the main body 1 affects the turbidity of the fluid in the main body 1, thereby maintaining the solid-liquid separation efficiency of the device for the fluid; one side of the guide shell 19 is fixedly connected to the side of the scraper 6 away from the adjacent filter plate 3, which is used to change the moving direction of the filter cake cut by the scraper 6; the diverter 20 is composed of a cylinder and a truncated cone cylinder, wherein the cylinder of the diverter 20 is only fixedly connected to the main body 1 on one side close to the feed inlet 101, and there is a gap between the other positions of the main body 1 in the circumferential direction, and the gap allows the sludge falling between the diverter 20 and the main body 1 to fall smoothly and accumulate at the lower part of the main body 1.

[0040] The working principle of the above scheme is as follows: when the scraper 6 moves downward to cut off the filter cake, the scraper 6 drives the adjacent guide shell 19 to move downward together, and the filter cake cut off by the scraper 6 moves along the side of the scraper 6 and the cutting strip 17 away from the adjacent filter plate 3 to the inside of the guide shell 19, and slides along the inner side surface of the guide shell 19, and the guide shell 19 guides the cut filter cake to move downward, so that the cut filter cake moves directly downward, reducing the probability of the cut filter cake stacking between two adjacent filter plates 3, and at the same time reducing the probability of the cut filter cake re-attaching to the remaining filter cake surface on the filter plate 3 under the action of fluid flow.

[0041] When the fluid enters the main body 1 through the feed port 101, the fluid is first located between the main body 1 and the diverter 20, and finally flows to the rest of the main body 1 along the gap between the upper and lower sides of the diverter 20 and the main body 1, so that the flow of the fluid in the main body 1 always adheres to its inner wall, reducing the impact of the fluid flow in the main body 1 on the falling of the filter cake and the accumulated sludge.

[0042] Finally, it should be noted that: Obviously, the above embodiments are only examples for clearly explaining the present application, and are not intended to limit the implementation methods. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from this are still within the scope of protection of this application.

Claims

1. A filter for hydrometallurgy of zinc, characterized in that: include: A main body (1), the main body (1) being provided with a feed port (101), a slag discharge port (102) being provided at the lower side of the main body (1), the main body (1) being fixedly connected with a liquid discharge pipe (2), the liquid discharge pipe (2) passing through the main body (1) and being fixedly connected with a plurality of filter plates (3) located in the main body (1) and distributed at equal intervals, the filter plates (3) being in communication with the liquid discharge pipe (2); A main ring (4) is arranged in the main body (1); a secondary ring (5) is arranged in the main body (1) at a position close to the main ring (4); scrapers (6) are arranged on both sides of the filter plate (3) and are rotatably connected to the main ring (4); the scrapers (6) are slidably connected to the secondary ring (5); the scrapers (6) are slidably connected to the main ring (4); the scrapers (6) are slidably connected to a positioning column (7) slidably connected to the main ring (4); the positioning column (7) is rotatably connected to the secondary ring (5); the scrapers (6) are used to thin the filter cake adhered to the surface of the adjacent filter plate (3); The main body (1) is sealingly and slidably connected with two clamping columns (8), both of which pass through the main body (1) and are in contact with the main ring (4) and the secondary ring (5), and the clamping columns (8) are used to drive the main ring (4) and the secondary ring (5) to move. The main body (1) is equipped with a cleaning push rod (9), and the telescopic end of the cleaning push rod (9) is fixedly connected to one end of the two clamping columns (8) away from the main ring (4).

2. The filter for hydrometallurgy of zinc according to claim 1, characterized in that: A secondary adjustment shaft (10) is rotatably connected in the clamping column (8) at a position close to the main ring (4), and the secondary adjustment shaft (10) and the secondary ring (5) are driven by a gear rack. A main adjustment member (11) rotatably connected to the secondary adjustment shaft (10) is rotatably connected in the clamping column (8), and the main adjustment member (11) and the main ring (4) are driven by a gear rack.

3. The filter for hydrometallurgy of zinc according to claim 2, characterized in that: The auxiliary adjustment shaft (10) and the main adjustment member (11) are both slidably connected to a squeeze column (12) on one side away from the main ring (4); a first spring is fixedly connected between the auxiliary adjustment shaft (10) and the main adjustment member (11) and adjacent squeeze columns (12) respectively; a plurality of limiting grooves (121) are provided in the clamping column (8) at a position close to the auxiliary adjustment shaft (10); the limiting grooves (121) are used to limit adjacent squeeze columns (12).

4. The filter for hydrometallurgy of zinc according to claim 3, characterized in that: Two extrusion cylinders (13) are fixedly connected in the main body (1) at a position away from the main ring (4). The extrusion cylinders (13) are used to extrude two adjacent extrusion cylinders (12) on adjacent clamping columns (8) and release the limiting relationship between the extrusion cylinders (12) and the adjacent limiting grooves (121). A guide cylinder (14) is fixedly connected in the extrusion cylinder (13). The guide cylinder (14) is used to extrude two adjacent extrusion cylinders (12) on adjacent clamping columns (8) and rotate the auxiliary adjustment shaft (10) and the main adjustment member (11).

5. The filter for hydrometallurgy of zinc according to claim 4, characterized in that: It also comprises shearing assemblies, the number of which is equal to that of the scrapers (6), which are respectively arranged on adjacent scrapers (6) and are used to assist the scrapers (6) in cutting the filter cake. The shearing assemblies comprise: A connecting rod (15) is slidably connected inside the scraper (6); the connecting rod (15) is fixedly connected to a sliding column (16); the sliding column (16) is slidably connected to the scraper (6), and a second spring is fixedly connected between the two. A cutting strip (17) is fixedly connected to the connecting rod (15) and is slidably connected to the scraper (6) in a limited position, the scraper (6) is provided with a plurality of stationary teeth (601), and the cutting strip (17) is provided with a plurality of movable teeth (171); The wave cylinder (18) is fixedly connected in the main body (1); one end of the sliding column (16) away from the adjacent connecting rod (15) contacts the wave cylinder (18); and the wave cylinder (18) is used to cause the sliding column (16) to reciprocate.

6. The filter for hydrometallurgy of zinc according to claim 5, characterized in that: The stationary teeth (601) and the movable teeth (171) are respectively located on the lower side of the adjacent scraper (6) and the adjacent cutting strip (17).

7. The filter for hydrometallurgy of zinc according to claim 5, characterized in that: A guide shell (19) is fixedly connected to one side of the scraper (6) away from the adjacent filter plate (3), and the guide shell (19) is used to change the movement trajectory of the removed portion of the filter cake.

8. The filter for hydrometallurgy of zinc according to claim 5, characterized in that include: The flow divider (20) is fixedly connected to a position in the main body (1) close to the feed inlet (101), and the flow divider (20) is used to disperse the fluid entering the main body (1) from the feed inlet (101).

9. The filter for hydrometallurgy of zinc according to claim 8, characterized in that: A slag discharge piece (21) is sealingly and slidably connected inside the slag discharge port (102), a slag discharge push rod (22) is installed on the main body (1), and a telescopic end of the slag discharge push rod (22) is fixedly connected to the slag discharge piece (21).

Images