Continuous washing and leaching device for rare earth pulpifying and decomposing ore pulp

Abstract

The utility model discloses a continuous washing and leaching device for rare earth pulpifying and decomposing ore pulp. The transmission assembly comprises transmission rollers which are symmetrically and rotationally connected to the rack, the two transmission rollers are in transmission fit through filter cloth, the space between the two transmission rollers is sequentially divided into a filtering area, a washing area and a leaching area in the transmission direction of the filter cloth through a partition frame, and the partition frame is installed on the rack; the three sets of negative pressure assemblies are arranged, the three sets of negative pressure assemblies are arranged in the filtering area, the washing area and the leaching area correspondingly, and the negative pressure assemblies and the filter cloth are arranged correspondingly; wherein a filtering assembly, a washing assembly and a leaching assembly are mounted on the rack; the filtering area is provided with a feeding port, and the leaching area is provided with a discharging port. The device not only can be used for fully washing and leaching pulpified and decomposed ore pulp and realizing the recovery of residual sulfuric acid in acid leaching residues through countercurrent washing design, but also can be continuously and automatically carried out, realizes continuous operation and improves the production efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of filtering and leaching equipment, in particular to a rare earth pulping and decomposition slurry continuous washing and leaching device. Background Art

[0002] Rare earth slurry decomposition slurry primarily consists of highly concentrated sulfuric acid, rare earth sulfate crystals, and other minerals. Plate and frame filtration is typically used to obtain acid leaching residue and acid leaching solution. Residues of high sulfuric acid concentrations remain in the acid leaching residue, requiring water to be added to wash away the residual sulfuric acid. The remaining acid leaching residue is then added to water to leach the rare earth sulfate solution. However, plate and frame filter presses are intermittent equipment, requiring only intermittent filtration, washing, and leaching, increasing operating time and reducing efficiency.

[0003] Based on the above technical problems, the utility model provides a rare earth slurry decomposition slurry continuous washing and leaching device. Utility Model Content

[0004] The purpose of the utility model is to provide a rare earth slurry decomposition slurry continuous washing and leaching device to solve the problems existing in the prior art.

[0005] To achieve the above-mentioned purpose, the present invention provides the following solution: The present invention provides a rare earth slurry decomposition slurry continuous washing and leaching device, comprising:

[0006] frame;

[0007] A transmission assembly, the transmission assembly comprising transmission rollers symmetrically connected to the frame, the two transmission rollers being coupled to each other via a filter cloth, the two transmission rollers being divided into a filtering area, a washing area, and a leaching area in sequence along the transmission direction of the filter cloth by a partition frame, the partition frame being mounted on the frame;

[0008] Negative pressure components, wherein three groups of negative pressure components are provided, and the three groups of negative pressure components are respectively provided in the filtering area, the washing area and the leaching area, and the negative pressure components are provided corresponding to the filter cloth;

[0009] Wherein, a filtering assembly, a washing assembly and a leaching assembly are installed on the frame, the filtering assembly is arranged corresponding to the filtering area, the washing assembly is arranged corresponding to the washing area, and the leaching assembly is arranged corresponding to the leaching area;

[0010] The filtration area is provided with a feed port, and the leaching area is provided with a discharge port.

[0011] According to the rare earth slurry decomposition slurry continuous washing and leaching device provided by the utility model, the filtering component includes a recovery tank, which is fixedly connected to the frame and is arranged below the filter cloth and corresponding to the filtering area.

[0012] According to the rare earth slurry decomposition slurry continuous washing and leaching device provided by the utility model, the washing assembly is provided with several stages of filter units arranged at equal intervals along the filtering direction of the filter cloth, the filter units are arranged corresponding to the filtering areas, and the filter units include a first sprayer and a first liquid receiving tank fixed to the frame, the first liquid receiving tank is located below the filter cloth, and the first sprayer is arranged above the filter cloth;

[0013] The first liquid receiving tank of the filtering unit at the next level is connected to the sprayer at the previous level via a connecting pipe, and a liquid pump is installed on the connecting pipe.

[0014] According to the rare earth slurry decomposition slurry continuous washing and leaching device provided by the utility model, the leaching assembly includes a plurality of leaching units arranged at equal intervals along the filter cloth, the leaching units are arranged corresponding to the leaching area, and the leaching unit includes a second sprayer fixedly connected to the frame and a second liquid receiving tank, the second sprayer is arranged above the filter cloth, and the second liquid receiving tank is arranged below the filter cloth;

[0015] The second liquid receiving tank of the leaching unit at the next stage is connected to the second sprayer at the previous stage through a delivery pipe, and the liquid pump is installed on the delivery pipe.

[0016] According to the rare earth slurry decomposition slurry continuous washing and leaching device provided by the utility model, the negative pressure component includes a negative pressure box fixedly connected to the partition frame, a groove is provided on the top of the negative pressure box, the filter cloth is arranged corresponding to the groove, and a plurality of through holes are arranged in a row in the groove. The bottom of the negative pressure box is fixedly connected to an extraction pipe, a negative pressure pump is installed on the extraction pipe, and the recovery tank, the first liquid receiving tank, and the second liquid receiving tank are respectively connected to the extraction pipe.

[0017] According to the rare earth slurry decomposition slurry continuous washing and leaching device provided by the utility model, the partition frame includes a mounting plate symmetrically fixedly connected to the frame, two groups of partition plates are arranged between the two mounting plates, the partition plates are arranged perpendicularly to the mounting plates, and the partition plates are arranged perpendicularly to the transmission direction of the filter cloth.

[0018] The utility model discloses the following technical effects:

[0019] The technical solution of this practical embodiment has at least the following advantages and beneficial effects. The pulping decomposition slurry of the utility model realizes continuous filtration, washing and leaching under the action of the filtering component, washing component and leaching component. Under the action of the negative pressure component, the acid leaching liquid, washing water and rare earth sulfate water leaching liquid are sucked away by vacuum negative pressure, and finally a high-concentration washing liquid and rare earth sulfate are obtained.

[0020] The utility model can not only fully wash and leach the pulping decomposition pulp, but also realize the recovery of residual sulfuric acid in the acid leaching residue through the countercurrent washing design. At the same time, it can be continuously and automatically carried out to realize continuous operation and improve production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 This is a schematic structural diagram of the rare earth slurry decomposition slurry continuous washing and leaching device of the utility model.

[0023] Among them, 1. filtration component; 2. washing component; 3. leaching component; 4. transmission component; 5. negative pressure component; 6. filter cloth; 7. feed port; 8. discharge port; 9. liquid pump; 12. recovery tank; 21. first sprayer; 22. first liquid receiving tank; 31. second sprayer. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0026] Reference Figure 1 The utility model provides a rare earth slurry decomposition slurry continuous washing and leaching device, comprising:

[0027] frame;

[0028] A transmission assembly 4, comprising transmission rollers symmetrically connected to the frame, wherein the two transmission rollers are coupled to each other through a filter cloth 6, and a partition frame is provided between the two transmission rollers to sequentially divide the filter area, the washing area, and the leaching area along the transmission direction of the filter cloth 6, wherein the partition frame is mounted on the frame;

[0029] Negative pressure components 5, wherein three groups of negative pressure components 5 are provided, and the three groups of negative pressure components 5 are respectively provided in the filtering area, the washing area and the leaching area, and the negative pressure components 5 are provided corresponding to the filter cloth 6;

[0030] The frame is provided with a filter assembly 1, a washing assembly 2 and a leaching assembly 3. The filter assembly 1 is provided corresponding to the filter area, the washing assembly 2 is provided corresponding to the washing area, and the leaching assembly 3 is provided corresponding to the leaching area.

[0031] The filtration area is provided with a feed port 7, and the leaching area is provided with a discharge port 8.

[0032] The technical solution of this practical embodiment has at least the following advantages and beneficial effects. The pulping decomposition slurry of the utility model realizes continuous filtration, washing and leaching under the action of the filtering component 1, the washing component 2 and the leaching component 3. Under the action of the negative pressure component 5, the acid leaching liquid, the washing water and the rare earth sulfate water leaching liquid are sucked away by vacuum negative pressure, and finally a high-concentration washing liquid and rare earth sulfate are obtained.

[0033] The utility model can not only fully wash and leach the pulping decomposition pulp, but also realize the recovery of residual sulfuric acid in the acid leaching residue through the countercurrent washing design. At the same time, it can be continuously and automatically carried out to realize continuous operation and improve production efficiency.

[0034] According to a further optimization solution, the filter assembly 1 includes a recovery tank 12, which is fixedly connected to the frame and is arranged below the filter cloth 6 and corresponds to the filter area.

[0035] A further optimized solution is that the washing assembly 2 has several stages of filtering units arranged at equal intervals along the filtering direction of the filter cloth 6, and the filtering units are arranged corresponding to the filtering areas. The filtering units include a first sprayer 21 and a first liquid receiving tank 22 fixed to the frame, the first liquid receiving tank 22 is located below the filter cloth 6, and the first sprayer 21 is arranged above the filter cloth 6;

[0036] The first liquid receiving tank 22 of the filtering unit at the next stage is connected to the sprayer at the previous stage via a connecting pipe, and a liquid pump 9 is installed on the connecting pipe.

[0037] Further optimized, the leaching assembly 3 includes a plurality of leaching units arranged at equal intervals along the filter cloth 6, the leaching units are arranged corresponding to the leaching area, and the leaching unit includes a second sprayer 31 fixedly connected to the frame and a second liquid receiving tank, the second sprayer 31 is arranged above the filter cloth 6, and the second liquid receiving tank is arranged below the filter cloth 6;

[0038] The second liquid receiving tank of the leaching unit at the next stage is connected to the second sprayer 31 at the previous stage through a delivery pipe, and the liquid extraction pump 9 is installed on the delivery pipe.

[0039] In a further optimization, the negative pressure assembly 5 includes a negative pressure box fixedly connected to the partition frame. A groove is defined at the top of the box, and the filter cloth 6 is positioned corresponding to the groove. The groove is lined with a plurality of through-holes. An extraction pipe is fixedly connected to the bottom of the box, and a negative pressure pump is installed on the extraction pipe. The recovery tank 12, the first liquid receiving tank 22, and the second liquid receiving tank are each connected to the extraction pipe. Wash water enters from the final first sprayer 21 and is sprayed onto the acid leaching residue. Negative pressure then pumps the wash water into the lower first liquid receiving tank 22. The water is then pumped into the upper first sprayer 21 by the extraction pump 9 for continued washing, ultimately producing wash water containing a high concentration of sulfuric acid. The cleaned acid leaching residue is transported to the leaching component 3 under the action of the filter cloth 6. New water enters the leaching unit of the last stage of the leaching component 3. The new water enters the second sprayer 31 at the end and sprays the acid leaching residue. After the water contacts the acid leaching residue, it is leached to obtain rare earth leachate. The rare earth leachate enters the second liquid receiving tank below through the negative pressure device, and is pumped to the second sprayer 31 of the upper stage through the liquid pump 9. It continues to spray and finally recovers the leachate in the first stage liquid receiving tank. The leachate residue is discharged from the discharge port 8 as it moves.

[0040] After being conveyed into the leaching unit, new water enters the terminal sprayer and sprays the acid leaching residue. After the water contacts the acid leaching residue, leaching is performed to obtain rare earth leachate. The rare earth leachate enters the lower liquid receiving tank through the negative pressure device, and is pumped to the upper-level sprayer by the pump to continue spraying. Finally, the leachate is recovered in the first-level liquid receiving tank, and the leaching residue is discharged from the discharge port 8 as it moves.

[0041] The grooves on the negative pressure box are used to fit with the filter cloth 6, which facilitates the retention of the slurry. The negative pressure pump provides negative pressure, so that the filter cloth 6 fits into the grooves. The slurry enters the filtration area and is filtered in the grooves at the top of the negative pressure box within the filtration area. After that, the liquid portion enters the recovery tank 12, and the residue is transported to the next section through the filter cloth 6 and finally discharged through the discharge port 8.

[0042] In a further optimized solution, the partition frame includes mounting plates symmetrically fixedly connected to the frame, with two sets of partition plates disposed between the two mounting plates. The partition plates are disposed perpendicularly to the mounting plates and perpendicularly to the transmission direction of the filter cloth 6. The mounting plates are disposed on both sides of the filter cloth 6, which is an annular structure. The filter cloth 6 replaces the transmission belt, and the transmission roller drives the filter cloth 6. The upper and lower ends of the partition plates slide in cooperation with the inner side of the filter cloth 6, and the negative pressure box is disposed on the mounting plate.

[0043] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present invention.

[0044] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Without departing from the spirit of the present invention, various modifications and improvements to the technical solutions of the present invention made by ordinary technicians in this field should fall within the scope of protection determined by the claims of the present invention.

Claims

1. A rare earth slurry decomposition slurry continuous washing and leaching device, characterized in that: include: frame; A transmission assembly (4), the transmission assembly (4) comprising transmission rollers symmetrically connected to the frame, the two transmission rollers being coupled to each other via a filter cloth (6), the two transmission rollers being divided into a filtering area, a washing area, and a leaching area in sequence along the transmission direction of the filter cloth (6) by a partition frame, the partition frame being mounted on the frame; A negative pressure assembly (5), wherein three groups of the negative pressure assembly (5) are provided, and the three groups of the negative pressure assembly (5) are respectively provided in the filtering area, the washing area, and the leaching area, and the negative pressure assembly (5) and the filter cloth (6) are provided correspondingly; The frame is provided with a filter assembly (1), a washing assembly (2) and a leaching assembly (3); the filter assembly (1) is arranged corresponding to the filter area, the washing assembly (2) is arranged corresponding to the washing area, and the leaching assembly (3) is arranged corresponding to the leaching area; The filtration area is provided with a feed port (7), and the leaching area is provided with a discharge port (8).

2. The rare earth slurry decomposition slurry continuous washing and leaching device according to claim 1, characterized in that: The filter assembly (1) comprises a recovery tank (12), the recovery tank (12) is fixedly connected to the frame, and the recovery tank (12) is arranged below the filter cloth (6) and corresponding to the filter area.

3. The rare earth slurry decomposition slurry continuous washing and leaching device according to claim 2, characterized in that: The washing assembly (2) comprises a plurality of filter units arranged at equal intervals along the filtering direction of the filter cloth (6), the filter units being arranged corresponding to the filtering areas, the filter units comprising a first sprayer (21) and a first liquid receiving tank (22) fixed to the frame, the first liquid receiving tank (22) being located below the filter cloth (6), and the first sprayer (21) being arranged above the filter cloth (6); The first liquid receiving tank (22) of the filtering unit at the next level is connected to the sprayer at the previous level via a connecting pipe, and a liquid pump (9) is installed on the connecting pipe.

4. The rare earth slurry decomposition slurry continuous washing and leaching device according to claim 3, characterized in that: The leaching assembly (3) comprises a plurality of leaching units arranged at equal intervals along the filter cloth (6), the leaching units being arranged corresponding to the leaching areas, the leaching units comprising a second sprayer (31) fixedly connected to the frame and a second liquid receiving tank, the second sprayer (31) being arranged above the filter cloth (6), and the second liquid receiving tank being arranged below the filter cloth (6); The second liquid receiving tank of the leaching unit at the next level is connected to the second sprayer (31) at the previous level via a delivery pipe, and the liquid extraction pump (9) is installed on the delivery pipe.

5. The rare earth slurry decomposition slurry continuous washing and leaching device according to claim 4, characterized in that: The negative pressure assembly (5) includes a negative pressure box fixedly connected to the partition frame, a groove is provided on the top of the negative pressure box, the filter cloth (6) is arranged corresponding to the groove, a plurality of through holes are arranged in a row in the groove, an extraction pipe is fixedly connected to the bottom of the negative pressure box, a negative pressure pump is installed on the extraction pipe, and the recovery tank (12), the first liquid receiving tank (22), and the second liquid receiving tank are respectively connected to the extraction pipe.

6. The rare earth slurry decomposition slurry continuous washing and leaching device according to claim 1, characterized in that: The partition frame comprises mounting plates symmetrically fixedly connected to the frame, two groups of partition plates are arranged between the two mounting plates, the partition plates are arranged perpendicularly to the mounting plates, and the partition plates are arranged perpendicularly to the transmission direction of the filter cloth (6).

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