A kind of high-efficiency washing equipment for removing soluble salt in electrolytic manganese residue

Abstract

This invention provides a washing device for efficiently removing soluble salts from electrolytic manganese slag, relating to the technical field of harmless treatment equipment for electrolytic manganese slag. The device includes a washing tank, a stirring and crushing drive mechanism, an inner rotating shaft, and an outer rotating shaft. A filter screen is also provided inside the tank. The inner rotating shaft is rotatably mounted within the outer rotating shaft. A first bevel gear is located at the top of the inner rotating shaft, and a second bevel gear is located at the top of the outer rotating shaft. Upper and lower crushing and stirring blades are respectively provided on the inner and outer rotating shafts. The beneficial effects of this invention are: the stirring and crushing drive mechanism can drive the inner and outer rotating shafts to rotate synchronously in opposite directions, thoroughly stirring and washing the electrolytic manganese slag; the counter-rotating upper and lower crushing and stirring blades can also apply opposite shearing forces to the large particles of electrolytic manganese slag on the filter screen, effectively breaking up the agglomerated manganese slag, improving washing efficiency, removing soluble salts from the manganese slag, and reducing the cost of subsequent harmless treatment.

Description

Technical Field

[0001] This utility model relates to the technical field of harmless treatment equipment for manganese slag, specifically a washing device for efficiently removing soluble salts from electrolytic manganese slag. Background Technology

[0002] my country is a major global producer of electrolytic manganese metal, accounting for 97% of global production capacity. Most domestic electrolytic manganese producers use low-grade domestic manganese carbonate ore as raw material. With the rapid development of the industry, the usable grade of manganese ore has decreased rapidly. The average grade of domestic manganese carbonate ore is only about 12%, and producing 1 ton of metallic manganese generates 8-10 tons of manganese slag, resulting in an annual increase of over ten million tons of manganese slag nationwide. Due to the limited dehydration capacity of current solid-liquid separation equipment, the filter cake formed after solid-liquid separation in a filter press is dense and blocky, with a moisture content still exceeding 20%. This high-moisture electrolytic manganese slag contains a large amount of soluble salts such as manganese sulfate and ammonium sulfate, as well as soluble heavy metal ions such as zinc, nickel, and cobalt. The total amount of soluble salts generally exceeds 10%. According to technical documents such as the "Technical Specification for Pollution Control of Manganese Slag" (HJ1241-2022) and the "Standard for Pollution Control of General Industrial Solid Waste Storage and Landfill" (GB18599-2020), after harmless treatment, manganese slag must be properly landfilled. The total water-soluble salt content of general industrial solid waste entering Class I landfills must be less than 2%. However, online washing on a filter press requires a large amount of water, increasing the difficulty of subsequent washing water treatment. Furthermore, due to the inconsistent water permeability of the manganese slag filter cake, online washing on a filter press can easily lead to a "short circuit" phenomenon in the washing water, resulting in inconsistent soluble salt content in the manganese slag filter cake and failing to meet the relevant requirements of the above technical specifications.

[0003] Chinese Patent Application No. CN201920220357.9 discloses a manganese slag mixing machine that is easy to clean. It includes a mixing cylinder and a mixing assembly. The mixing assembly includes a mixing shaft, a drive motor, and mixing blades. A drive gear is sleeved on the output shaft of the drive motor. A drive gear is sleeved on the upper end of the mixing shaft. The drive gear and the drive gear mesh. The mixing blades are welded to the mixing shaft. The mixing shaft extends into the mixing cylinder. The mixing cylinder is provided with a feed inlet, a discharge outlet, and a vent. The mixing shaft and the mixing blades are hollow inside. The hollow part inside the mixing shaft communicates with the hollow part inside the mixing blades. Both the mixing shaft and the mixing blades are provided with water outlet holes. Water spray pipes are provided on the water outlet holes. The upper end of the mixing shaft is open and the lower end is closed. A water inlet pipe is connected to the upper end opening of the mixing shaft through a flange.

[0004] Existing manganese slag stirring and washing devices have difficulty breaking up the blocky manganese slag filter cake during the manganese slag washing process. They cannot ensure that the soluble salt content of the manganese slag after water washing is consistently up to standard. In addition, the washing efficiency is low and the time consumption is long, which increases the cost of harmless treatment of manganese slag. They are difficult to meet the technical requirements of efficiently and stably reducing the soluble salt content of slag in the process of large-scale manganese slag treatment. Utility Model Content

[0005] In order to overcome the shortcomings of the existing technology, the purpose of this utility model is to provide a washing device for efficiently removing soluble salts from electrolytic manganese slag. The device can use the upper and lower crushing and stirring blades that rotate synchronously in opposite directions to fully stir and clean the electrolytic manganese slag, and at the same time, the upper and lower crushing and stirring blades can apply shearing forces in opposite directions to the blocky electrolytic manganese slag, so as to simultaneously crush and wash the electrolytic manganese slag filter cake.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution: A washing device for efficiently removing soluble salts from electrolytic manganese slag, comprising a washing tank and a stirring and crushing drive mechanism, an inner rotating shaft and an outer rotating shaft; The washing tub is equipped with a slag discharge port at the bottom and a liquid discharge port on the side wall. A filter screen plate is also installed inside the washing tub. A cover is provided on the top of the washing tub. The filter screen plate has multiple sieve holes. The stirring and crushing drive mechanism is fixed to the cover, and the cover is provided with a feed inlet and a reagent inlet; The inner rotating shaft is rotatably disposed outside the outer rotating shaft. The top of the inner rotating shaft is provided with a first bevel gear, and the top of the outer rotating shaft is provided with a second bevel gear. The end of the stirring and crushing drive mechanism is connected to a drive bevel gear, which meshes with both the first and second bevel gears. The lower end of the rotating outer shaft is fixedly provided with multiple upper crushing and stirring blades, and the rotating inner shaft is provided with multiple lower crushing and stirring blades. The lower crushing and stirring blades are located above the filter screen plate and above the upper crushing and stirring blades.

[0007] Furthermore, a first stirring ring is sleeved on the outer rotating shaft, a second stirring ring is sleeved on the inner rotating shaft, the upper crushing and stirring blade is fixed on the first stirring ring, and the lower crushing and stirring blade is fixed on the second stirring ring.

[0008] Furthermore, the upper crushing and stirring blade is tilted and fixed on the first stirring ring, and the lower crushing and stirring blade is tilted and fixed on the second stirring ring, with the tilting direction of the upper crushing and stirring blade being opposite to that of the lower crushing and stirring blade.

[0009] Furthermore, the filter screen plate is provided with a clearance hole in the middle, and the lower end of the rotating inner shaft extends through the clearance hole to the bottom of the filter screen plate.

[0010] Furthermore, the portion of the rotating inner shaft located below the filter screen plate is equipped with stirring blades.

[0011] Furthermore, the bottom of the washing tub is provided with a rotating support sleeve, which is fixed to the inner wall of the washing tub by a connecting rod, and the lower end of the rotating inner shaft is rotatably supported inside the rotating support sleeve.

[0012] Furthermore, the inner wall of the washing tub is provided with stepped protrusions, and the edge of the filter screen plate is supported and fixed to the stepped protrusions.

[0013] Furthermore, the side wall of the washing tub is provided with a cleaning port, and the cleaning port is provided with a cleaning window plate fixed by a fastening screw. The cleaning window plate is made of transparent material.

[0014] Furthermore, the stirring and crushing drive mechanism includes a drive motor and a reducer, the drive motor is fixed on the cover, and the reducer is fixed to the end of the drive motor.

[0015] Furthermore, the drive motor and the reducer are an integrated structure, and the drive bevel gear is axially provided with a gear shaft, which is connected to the output shaft of the reducer via a coupling.

[0016] The beneficial effects of this utility model's efficient washing equipment for removing soluble salts from electrolytic manganese slag are as follows: The equipment includes a washing tank, a stirring and crushing drive mechanism, an inner rotating shaft, and an outer rotating shaft. A filter screen is also provided inside the washing tank. The inner rotating shaft is rotatably mounted within the outer rotating shaft. A first bevel gear is located at the top of the inner rotating shaft, and a second bevel gear is located at the top of the outer rotating shaft. A drive bevel gear is connected to the end of the stirring and crushing drive mechanism, and the drive bevel gear meshes with both the first and second bevel gears simultaneously. Multiple upper crushing and stirring blades are fixedly mounted at the lower end of the outer rotating shaft, and multiple lower crushing and stirring blades are mounted on the inner rotating shaft. This stirring and crushing drive mechanism can drive the inner and outer rotating shafts to rotate synchronously in opposite directions. This allows the upper and lower crushing and stirring blades to rotate synchronously in opposite directions, thoroughly stirring and cleaning the electrolytic manganese slag. Furthermore, large particles in the electrolytic manganese slag tend to accumulate on the filter screen. The opposing rotation of the upper and lower crushing and stirring blades can also apply shearing forces in opposite directions to the large particles of electrolytic manganese slag, simultaneously crushing and washing the electrolytic manganese slag filter cake, ensuring that the soluble salt content in the manganese slag consistently meets the standards. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of a washing device for efficiently removing soluble salts from electrolytic manganese slag, according to an embodiment of this utility model.

[0018] Figure 2 This is a cross-sectional view of the overall structure of a washing device for efficiently removing soluble salts from electrolytic manganese slag, according to an embodiment of this utility model.

[0019] Figure 3 yes Figure 2 Enlarged view of point A in the middle.

[0020] Figure 4 This is a perspective view of a filter screen plate of a washing device for efficiently removing soluble salts from electrolytic manganese slag, according to an embodiment of this utility model.

[0021] In the above diagram: 100-bucket body, 101-support leg, 102-slag discharge port, 103-liquid discharge port, 104-cleaning port, 200-cover, 201-protective cover, 300-rotating inner shaft, 301-first bevel gear, 302-rotating support sleeve, 310-second stirring ring, 311-lower crushing and stirring blade, 400-rotating outer shaft, 401-second bevel gear, 410-first stirring ring, 411-upper crushing and stirring blade, 500-drive motor, 501-reducer, 600-drive bevel gear, 601-gear shaft, 700-filter screen plate, 701-screen hole, 702-avoidance hole, 800-cleaning window plate. Detailed Implementation

[0022] To make the objectives, technical solutions and advantages of this utility model clearer, the embodiments of this utility model will be further described below with reference to the accompanying drawings.

[0023] Please refer to Figures 1 to 4 This utility model discloses a washing device for efficiently removing soluble salts from electrolytic manganese slag, comprising a tank body 100, a stirring and crushing drive mechanism, an inner rotating shaft 300, and an outer rotating shaft 400.

[0024] The barrel 100 has a cylindrical structure. The bottom of the barrel 100 is supported by multiple support legs 101. The bottom of the barrel 100 is provided with a slag discharge port 102 and the side wall is provided with a liquid discharge port 103. The barrel 100 is also provided with a filter screen plate 700. The top of the barrel 100 is provided with a cover 200. The filter screen plate 700 has multiple screen holes 701, and the filter screen plate 700 is also provided with a clearance hole 702 in the middle.

[0025] The stirring and crushing drive mechanism is fixed on the cover 200, and the cover 200 is provided with a feed inlet and a reagent inlet; the inner rotating shaft 300 is rotatably disposed inside the outer rotating shaft 400. Specifically, the inner rotating shaft 300 is also fitted with a rotating bearing, so that the inner rotating shaft 300 and the outer rotating shaft 400 can be coaxially disposed and rotate independently.

[0026] The inner rotating shaft 300 is topped with a first bevel gear 301, and the outer rotating shaft 400 is topped with a second bevel gear 401. The first bevel gear 301 and the second bevel gear 401 are parallel and arranged vertically relative to each other. A driving bevel gear 600 is connected to the end of the stirring and crushing drive mechanism. The driving bevel gear 600 meshes perpendicularly with both the first bevel gear 301 and the second bevel gear 401. Specifically, the stirring and crushing drive mechanism includes a drive motor 500 and a reducer 501. The drive motor 500 is fixedly mounted on the cover 200 via a mounting base, and the reducer 501 is fixed to the end of the drive motor 500. The drive motor 500 and the reducer 501 are an integrated structure. The driving bevel gear 600 has an axially arranged gear shaft 601, which is connected to the output shaft of the reducer 501 via a coupling. The stirring and crushing drive mechanism drives the driving bevel gear 600 to rotate, thereby driving the inner rotating shaft 300 and the outer rotating shaft 400 to rotate synchronously.

[0027] The filter screen plate 700 is also provided with a clearance hole 702 in the middle. The lower end of the rotating inner shaft 300 extends through the clearance hole 702 to the bottom of the filter screen plate 700. Both the rotating inner shaft 300 and the rotating outer shaft 400 are provided with multiple stirring rings, and each stirring ring is provided with multiple stirring blades. That is, the part of the rotating inner shaft 300 located below the filter screen plate 700 is also provided with stirring blades. The stirring ring at the lower end of the rotating outer shaft 400 is the first stirring ring 410, and the uppermost stirring ring of the rotating outer shaft 400 is the second stirring ring 310. Multiple upper crushing stirring blades 411 are fixedly provided on the first stirring ring 410, and multiple lower crushing stirring blades 311 are fixedly provided on the second stirring ring 310. The lower crushing stirring blades 311 are located above the filter screen plate 700 and abut against the filter screen plate 700. The lower crushing stirring blades 311 are located above the upper crushing stirring blades 411, and a crushing gap is formed between them. The upper crushing and stirring blade 411 is inclined and fixed on the first stirring ring 410, and the lower crushing and stirring blade 311 is inclined and fixed on the second stirring ring 310. The inclination direction of the upper crushing and stirring blade 411 is opposite to that of the lower crushing and stirring blade 311. When the upper and lower crushing and stirring blades rotate in opposite directions, the inclined structure of the lower crushing and stirring blade 311 can scoop up the granular manganese slag accumulated on the filter screen plate 700 and place it into the crushing gap. The upper and lower crushing and stirring blades can apply shearing forces in opposite directions to the large granular manganese slag located in the crushing gap, so that the blocky manganese slag is crushed. The crushed manganese slag can pass through the screen hole 701 and enter the lower part of the barrel 100.

[0028] In a preferred embodiment, the bottom of the barrel 100 is also provided with a rotating support sleeve 302. The rotating support sleeve 302 is fixed to the inner wall of the barrel 100 by a connecting rod. The lower end of the rotating inner shaft 300 is rotatably supported in the rotating support sleeve 302. This provides rotational support to the lower end of the rotating inner shaft 300 and ensures the stability of the rotation of the inner and outer shafts.

[0029] In a preferred embodiment, the upper part of the side wall of the barrel 100 is thin and the lower part is thick, so that the inner wall of the barrel 100 forms a stepped protrusion. The edge of the filter screen plate 700 and the stepped protrusion are provided with a ring of threaded mounting holes. The edge of the filter screen plate 700 is supported on the stepped protrusion. Fastening bolts are provided in the threaded mounting holes, and the fastening bolts fix the filter screen plate 700 on the stepped protrusion. The structure of the barrel 100, which is thin at the top and thick at the bottom, allows its center to shift downward, ensuring that the entire barrel 100 can be stably supported on the ground.

[0030] In a preferred embodiment, the side wall of the barrel 100 is also provided with a cleaning port 104. The cleaning port 104 is provided with a cleaning window plate 800 fixed by a fastening screw. The cleaning window plate 800 is made of transparent material, such as fiberglass. This allows for easy observation of the inside of the barrel 100 and facilitates the periodic opening of the cleaning port 104 to clean the large manganese slag particles remaining on the filter screen plate 700.

[0031] The working process of this utility model of a washing device for efficiently removing soluble salts from electrolytic manganese slag is as follows: the electrolytic manganese slag to be treated is put into the tank 100 through the feed inlet, and washing water or purification agent solution (such as lime water) is added through the agent inlet. The drive motor 500 drives the inner rotating shaft 300 and the outer rotating shaft 400 to rotate synchronously in opposite directions. The stirring blades on the inner rotating shaft 300 and the outer rotating shaft 400 can fully stir and clean the electrolytic manganese slag. Larger manganese slag particles will settle on the filter screen plate 700. The two agitator blades located at the top and closest to the filter screen plate 700 are the upper and lower crushing agitator blades 411 and 311, respectively. During the rotation of the upper and lower crushing agitator blades 411 and 311, the lower crushing agitator blade 311 can scoop up large manganese slag particles, while the upper crushing agitator blade 411 can impact and cut large manganese slag particles. The upper and lower crushing agitator blades 411 and 311 can apply shearing forces in opposite directions to the blocky manganese slag to crush it during electrolytic manganese slag. The crushed manganese slag passes through the filter screen plate 700 and enters the lower part of the washing tank. After washing, the wash water is discharged from the drain port 103 and can be discharged or reused after further treatment to meet the standards. The electrolytic manganese slag is discharged through the slag discharge port 102 for further treatment or recycling.

[0032] In this document, the directional terms such as front, back, top, and bottom are defined based on the location of the components in the accompanying drawings and their relative positions to each other, solely for the purpose of clarity and convenience in expressing the technical solution. It should be understood that the use of these directional terms should not limit the scope of protection claimed in this application.

[0033] Where there is no conflict, the above embodiments and features described herein can be combined with each other.

[0034] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A washing device for efficiently removing soluble salts from electrolytic manganese slag, characterized in that, It includes a barrel body (100), a stirring and crushing drive mechanism, an inner rotating shaft (300), and an outer rotating shaft (400). The barrel (100) is provided with a slag discharge port (102) at the bottom and a liquid discharge port (103) on the side wall. The barrel (100) is also provided with a filter screen plate (700). The barrel (100) is provided with a cover (200) at the top. The filter screen plate (700) has multiple screen holes (701). The stirring and crushing drive mechanism is fixed on the cover (200), and the cover (200) is provided with a feed inlet and a reagent inlet; The inner rotating shaft (300) is rotatably disposed within the outer rotating shaft (400). The top of the inner rotating shaft (300) is provided with a first bevel gear (301), and the top of the outer rotating shaft (400) is provided with a second bevel gear (401). The end of the stirring and crushing drive mechanism is connected to a drive bevel gear (600), which meshes with both the first bevel gear (301) and the second bevel gear (401). The lower end of the rotating outer shaft (400) is fixedly provided with a plurality of upper crushing and stirring blades (411), and the rotating inner shaft (300) is provided with a plurality of lower crushing and stirring blades (311). The lower crushing and stirring blades (311) are located above the filter screen plate (700) and above the upper crushing and stirring blades (411).

2. The washing equipment for efficiently removing soluble salts from electrolytic manganese slag according to claim 1, characterized in that, The outer rotating shaft (400) is fitted with a first stirring ring (410), the inner rotating shaft (300) is fitted with a second stirring ring (310), the upper crushing stirring blade (411) is fixed on the first stirring ring (410), and the lower crushing stirring blade (311) is fixed on the second stirring ring (310).

3. The washing equipment for efficiently removing soluble salts from electrolytic manganese slag according to claim 2, characterized in that, The upper crushing and stirring blade (411) is inclined and fixed on the first stirring ring (410), and the lower crushing and stirring blade (311) is inclined and fixed on the second stirring ring (310). The inclination direction of the upper crushing and stirring blade (411) is opposite to that of the lower crushing and stirring blade (311).

4. The washing equipment for efficiently removing soluble salts from electrolytic manganese slag according to claim 1, characterized in that, The filter screen plate (700) is also provided with a clearance hole (702) in the middle, and the lower end of the rotating inner shaft (300) extends through the clearance hole (702) to the bottom of the filter screen plate (700).

5. The washing equipment for efficiently removing soluble salts from electrolytic manganese slag according to claim 4, characterized in that, The portion of the rotating inner shaft (300) located below the filter screen plate (700) is equipped with stirring blades.

6. The washing equipment for efficiently removing soluble salts from electrolytic manganese slag according to claim 4, characterized in that, The bottom of the barrel (100) is also provided with a rotating support sleeve (302). The rotating support sleeve (302) is fixed to the inner wall of the barrel (100) by a connecting rod. The lower end of the rotating inner shaft (300) is rotatably supported in the rotating support sleeve (302).

7. The washing equipment for efficiently removing soluble salts from electrolytic manganese slag according to claim 1, characterized in that, The inner wall of the barrel (100) is provided with stepped protrusions, and the edge of the filter screen plate (700) is supported and fixed on the stepped protrusions.

8. The washing equipment for efficiently removing soluble salts from electrolytic manganese slag according to claim 1, characterized in that, The side wall of the barrel (100) is also provided with a cleaning port (104), and the cleaning port (104) is fixedly provided with a cleaning window plate (800), which is made of transparent material.

9. The washing equipment for efficiently removing soluble salts from electrolytic manganese slag according to claim 1, characterized in that, The stirring and crushing drive mechanism includes a drive motor (500) and a reducer (501). The drive motor (500) is fixed on the cover (200), and the reducer (501) is fixed to the end of the drive motor (500).

10. A washing device for efficiently removing soluble salts from electrolytic manganese slag according to claim 9, characterized in that, The drive motor (500) and the reducer (501) are an integrated structure. The drive bevel gear (600) is axially provided with a gear shaft (601). The gear shaft (601) is connected to the output shaft of the reducer (501) through a coupling.

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