Filter residue recycling device using manganese carbonate ore as acid collecting auxiliary material

Abstract

The utility model relates to the technical field of manganese ore processing, and provides a filter residue recycling device taking manganese carbonate ore as an acid collecting auxiliary material, which comprises a leaching reaction bin, an acid collecting reaction box bin is arranged at the bottom of the leaching reaction bin, and a secondary filter pressing bin is fixedly connected to the bottom of the acid collecting reaction box bin. The leaching reaction bin, the acid collecting reaction box bin and the secondary filter pressing bin are communicated with one another, one side of the secondary filter pressing bin is fixedly connected with a slurrying bin body, the bottom of the slurrying bin body is fixedly connected with a first motor, the output end of the first motor is fixedly connected with a slurrying stirring blade, and after filter residues are filtered out for the second time, the filter residues are filtered out. Waste residues enter the slurrying bin body through the first filter screen, the first motor is started to enable the slurrying stirring blade to crush slurrying filter residues, the slurrying filter residues are filtered through the slurrying filter screen, and the slurrying filter residues are pumped into the leaching reaction bin through the third material collecting pump to be continuously used and continuously used as raw materials of a leaching workshop section, so that the purpose of cyclic utilization is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to manganese ore processing technical field, concretely relates to a kind of filter residue recycling device of carbonatite as acid collecting auxiliary material. BACKGROUND

[0002] Manganese ore is widely used in steel, chemical, new energy material and other fields. Manganese ore is a mineral resource containing manganese element, usually with high hardness, but relatively brittle, metallic luster. The main ore types of manganese ore include manganese hydroxide, manganese oxide and manganese carbonate, and less common manganese sulfide, manganese silicate and manganese borate, etc.

[0003] After searching, the existing patent (CN219385272U) discloses a recycling device for filter residue in silicon-manganese alloy production, which includes a stirring assembly, the stirring assembly includes a cylinder, a first feed pipe, a second feed pipe, a first motor, a stirring shaft and stirring blade plates; the upper surface of the cylinder is connected with the first feed pipe and the second feed pipe, the upper surface of the cylinder is installed with the first motor, the output shaft of the first motor is fixedly connected with the top end of the stirring shaft, and the outer side wall of the stirring shaft is uniformly fixedly connected with the stirring blade plates; the bottom of the stirring assembly is provided with a drying assembly. As a further preferred aspect of the present technical solution: the stirring assembly further includes an operation panel, support legs, a support plate, a discharge pipe and a solenoid valve; the outer side wall of the cylinder is installed with the operation panel. As a further preferred aspect of the present technical solution: the lower surface of the cylinder is fixedly connected with four support legs symmetrically, and one side of the support leg is fixedly connected with the support plate. As a further preferred aspect of the present technical solution: the lower surface of the cylinder is connected with the discharge pipe, and the discharge pipe is installed with the solenoid valve. As a further preferred aspect of the present technical solution: the drying assembly includes a third feed pipe, a second motor, a transmission shaft, a spiral blade plate, a through hole, a third motor, a first bevel gear, a second bevel gear, a cutter, a box, an electric guide rail, a baffle, a conveyor belt and a heater; the bottom of the discharge pipe is connected with the third feed pipe, and the outer side wall of the third feed pipe is fixedly connected with the support plate. As a further preferred aspect of the present technical solution: one end of the third feed pipe is installed with the second motor, the output shaft of the second motor is fixedly connected with one end of the transmission shaft, and the outer side wall of the transmission shaft is fixedly connected with the spiral blade plate. The advantages of the utility model: the utility model adds electric furnace filter residue and binder into the cylinder through the feed pipe, and fully stirs through the stirring shaft, so that the material is uniform, the filter residue is formed and dried through the drying assembly, the dust-like filter residue is processed into large-particle silicon-manganese ore, and is recycled as silicon-manganese alloy production raw material, to avoid environmental pollution caused by filter residue, reduce resource waste, improve resource utilization rate, and the filter residue is treated in a closed manner during recycling, to prevent dust-like filter residue from entering the air and affecting the health of workers.

[0004] But in the above scheme, the process produced filter residue can directly into the recycling, filtered manganese ore need to take out the use of artificial, still difficult to avoid contact with staff.

[0005] In view of this, the utility model provides a kind of filter residue recycling device of manganese carbonate as acid collecting auxiliary material. Utility model contents

[0006] The utility model provides a kind of filter residue recycling device of manganese carbonate as acid collecting auxiliary material, solved the filter residue of process in relevant art can directly into the recycling, filtered manganese ore need to take out the use of artificial, still difficult to avoid contact with staff's problem.

[0007] The technical scheme of the utility model is as follows: a kind of filter residue recycling device of manganese carbonate as acid collecting auxiliary material, including leaching reaction bin: the bottom of the leaching reaction bin is provided with acid collecting reaction box bin, the bottom of the acid collecting reaction box bin is fixedly connected with secondary pressure filtration bin, the leaching reaction bin, acid collecting reaction box bin and secondary pressure filtration bin are interconnected, one side of the secondary pressure filtration bin is fixedly connected with slurry bin body, the bottom of the slurry bin body is fixedly connected with motor one, the output end of the motor one is fixedly connected with slurry stirring blade, the middle position in the inside of the slurry bin body is fixedly connected with slurry filter screen, the slurry filter screen separates the bin body of the both sides in the inside of the slurry bin body, the motor one is set below the one side bin chamber of slurry filter screen, the top of the slurry bin body other side bin chamber is provided with material conveying pipeline, the top of the material conveying pipeline is fixedly connected with material collecting pump three, the top of the material conveying pipeline is communicated with the inside of the leaching reaction bin, the top of the inside of the secondary pressure filtration bin is fixedly connected with filter screen one, the filter screen one is obliquely arranged, the bottom end of the oblique position of the filter screen one is communicated above, the one side of the slurry bin body is provided with material collecting port, the material collecting port is communicated with the bin body of the side where the slurry stirring blade is located, manganese ore is leached by the inside of the leaching reaction bin, is diverted after being turned by fixed rod and is filtered multiple times, after filtration, a certain amount of residual acid is still contained in the filtrate, is discharged into the inside of the acid collecting reaction box bin from the leaching reaction bin, the manganese carbonate powder is input into the inside of the acid collecting reaction box bin from the feed hopper of the both sides of the acid collecting reaction box bin and is acid collected, to avoid introducing new impurities, after filter residue secondary filtration, waste residue is entered into the inside of the slurry bin body from the filter screen one, motor one is started to make slurry stirring blade break slurry filter residue, already slurry filter residue is filtered by slurry filter screen, is extracted into the inside of the leaching reaction bin by material collecting pump three and continues to be used, continues to be used as raw material of leaching section, achieves the purpose of recycling.

[0008] Preferably, one side of the leaching reaction bin is fixedly connected with a material port one, the top of the leaching reaction bin is fixedly connected with a motor two, the output end of the motor two is fixedly connected with a stirring rod, the other end of the stirring rod is fixedly connected with a fixed rod, the bottom of the fixed rod is fixedly connected with a uniform material tooth, the bottom of the uniform material tooth is provided with a filter screen two, the material can be fed through the material port one, after the material is fed into the inside of the leaching reaction bin and performs pulping reaction, the stirring rod is rotated to press filter through the fixed rod.

[0009] Preferably, the fixed rod is a rectangular wide plate, a plurality of uniform material teeth are arranged on the bottom of the fixed rod, and the plurality of uniform material teeth are equidistantly distributed on the bottom of the fixed rod.

[0010] Preferably, the bottom of the filter screen two is away from the bottom plate of the leaching reaction bin, and the bottom of the uniform material tooth is slidably attached to the top of the filter screen two.

[0011] Preferably, a material collecting pump one is arranged between the leaching reaction bin and the acid collecting reaction bin, the leaching reaction bin and the acid collecting reaction bin are communicated with each other through the material collecting pump one, support frames are equidistantly arranged on the edges of the top of the acid collecting reaction bin, and the top of the support frame is fixedly connected with the leaching reaction bin, so that the inside of the acid collecting reaction bin can be fed through the material collecting pump one.

[0012] Preferably, feed hoppers are fixedly connected to the two sides of the acid collecting reaction bin, feed valves are fixedly connected in the feed hoppers, the feed valves are adapted to open and close the feed position of the feed hoppers, and the inside of the acid collecting reaction bin can be input with manganese carbonate ore powder through the feed hoppers.

[0013] Preferably, a material collecting pump two is arranged between the acid collecting reaction bin and the secondary pressure filtration bin, the material collecting pump two communicates the acid collecting reaction bin and the secondary pressure filtration bin, and support frames are arranged between the acid collecting reaction bin and the secondary pressure filtration bin.

[0014] Preferably, a neutralization bin is fixedly connected to one side of the secondary pressure filtration bin, the neutralization bin communicates the secondary pressure filtration bin, a material collecting pump four is arranged on one side of the neutralization bin, the material collecting pump four communicates the inside of the secondary pressure filtration bin, a material collecting pump five is arranged on the other side of the neutralization bin, the neutralization bin can neutralize the liquid filtered out through the material collecting pump four and the material collecting pump five.

[0015] Preferably, a support rod is fixedly connected to the bottom of the pulping bin body, and the bottom of the support rod is located on the same horizontal plane as the bottom of the secondary pressure filtration bin.

[0016] Preferably, the first filter screen separates the upper and lower sides of the secondary filter chamber, the lower side of the first filter screen is located on one side of the slurry chamber in the inclined direction, and the bottom of the neutralization chamber is in contact with the bottom surface.

[0017] The beneficial effects of this utility model are as follows:

[0018] 1. In this utility model, manganese ore undergoes leaching reaction inside the leaching reaction chamber. After being turned by a fixed rod, it undergoes multiple pressure filtrations. After the pressure filtration is completed, the filtrate still contains a certain amount of residual acid, which is discharged from the leaching reaction chamber into the acid collection reaction chamber. Manganese carbonate ore powder is fed into the acid collection reaction chamber through the feed hoppers on both sides of the acid collection reaction chamber for acid collection, avoiding the introduction of new impurities. After the filter residue is filtered out for the second time, the waste residue enters the slurry chamber through filter screen one. Motor one is started to break the slurry filter residue with slurry stirring blades. The slurry filter residue is filtered by the slurry filter screen and pumped into the leaching reaction chamber by collection pump three for continued use as raw material in the leaching section, achieving the purpose of recycling.

[0019] 2. In this utility model, the feed port 1 enables feeding. After the feed enters the leaching reaction chamber for slurry reaction, the rotating stirring rod is filtered by the fixed rod, and the uniform feeding teeth can uniformly feed the material to achieve uniform reaction. The collecting pump 1 can feed the acid recovery reaction chamber into the chamber. The feed hopper inputs manganese carbonate ore powder into the acid recovery reaction chamber. Finally, the filtered liquid is neutralized in the neutralization chamber, fed into the collecting pump 4, and discharged by the collecting pump 5. Attached Figure Description

[0020] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0021] Figure 1 This is a three-dimensional structural diagram of the present invention from one side view;

[0022] Figure 2 This is a three-dimensional structural schematic diagram of the present invention from another side view;

[0023] Figure 3 This is a three-dimensional schematic diagram of the present invention viewed from below;

[0024] Figure 4 This is a front view structural diagram of the present invention;

[0025] Figure 5 This is a front view of the internal structure of this utility model.

[0026] In the diagram: 1. Leaching reaction chamber; 2. Acid collection reaction chamber; 3. Secondary filter press chamber; 4. Support frame; 5. Collecting pump one; 6. Feed hopper; 7. Feed valve; 8. Collecting pump two; 9. Feed inlet one; 10. Filter screen one; 11. Collection port; 12. Slurry chamber; 13. Slurry filter screen; 14. Conveying pipeline; 15. Collecting pump three; 16. Collecting pump four; 17. Neutralization chamber; 18. Collecting pump five; 19. Support rod; 20. Motor one; 21. Slurry stirring blade; 22. Motor two; 23. Stirring rod; 24. Fixing rod; 25. Distribution teeth; 26. Filter screen two. Detailed Implementation

[0027] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this utility model.

[0028] Example 1

[0029] A preferred embodiment of the filter residue recycling device for using manganese carbonate ore as an acid recovery auxiliary material provided by this utility model is as follows: Figures 1 to 5 As shown: A device for recycling filter residue from manganese carbonate ore as an acid recovery auxiliary material includes a leaching reaction chamber 1; an acid recovery reaction chamber 2 is located at the bottom of the leaching reaction chamber 1; a secondary filter press 3 is fixedly connected to the bottom of the acid recovery reaction chamber 2; the leaching reaction chamber 1, the acid recovery reaction chamber 2, and the secondary filter press 3 are interconnected; a slurry preparation chamber 12 is fixedly connected to one side of the secondary filter press 3; a motor 20 is fixedly connected to the bottom of the slurry preparation chamber 12; a slurry stirring blade 21 is fixedly connected to the output end of the motor 20; and a slurry filter screen 13 is fixedly connected to the middle position inside the slurry preparation chamber 12, separating the slurry. Inside the slurry chamber 12, on both sides, a motor 20 is located below one side of the slurry filter screen 13. Above the other side of the slurry chamber 12, a conveying pipe 14 is provided. A collection pump 15 is fixedly connected to the top of the conveying pipe 14. The top of the conveying pipe 14 is connected to the interior of the leaching reaction chamber 1. A filter screen 10 is fixedly connected to the top of the interior of the secondary filter chamber 3. The filter screen 10 is set at an angle. The collection port 11 is connected to the top of the bottom of the angled position of the filter screen 10. A collection port 11 is provided on one side of the slurry chamber 12. The collection port 11 is connected to the side of the chamber where the slurry stirring blade 21 is located.

[0030] It should be noted that the existing recycling equipment still has some shortcomings. The filter residue produced by the process can be directly recycled, but the filtered manganese ore needs to be manually removed for use, which still makes it difficult to avoid contact with workers.

[0031] In this embodiment, the manganese ore undergoes a leaching reaction inside the leaching reaction chamber 1. After being turned by the fixed rod 24, it undergoes multiple pressure filtrations. After the pressure filtration is completed, the filtrate still contains a certain amount of residual acid, which is discharged from the leaching reaction chamber 1 into the acid recovery reaction chamber 2. The manganese carbonate ore powder is fed into the acid recovery reaction chamber 2 through the feed hoppers 6 on both sides of the acid recovery reaction chamber 2 for acid recovery, avoiding the introduction of new impurities. After the filter residue is filtered out for the second time, the waste residue enters the pulping chamber 12 through the filter screen 10. The motor 20 is started to cause the pulping stirring blades 21 to break the pulped filter residue. The pulped filter residue is filtered by the pulping filter screen 13 and pumped into the leaching reaction chamber 1 by the collection pump 15 for continued use as raw material in the leaching section, achieving the purpose of recycling.

[0032] In a further preferred embodiment of this utility model, a material inlet 9 is fixedly connected to one side of the leaching reaction chamber 1, a motor 22 is fixedly connected to the top of the leaching reaction chamber 1, a stirring rod 23 is fixedly connected to the output end of the motor 22, a fixing rod 24 is fixedly connected to the other end of the stirring rod 23, a material leveling tooth 25 is fixedly connected to the bottom of the fixing rod 24, and a filter screen 26 is provided at the bottom of the material leveling tooth 25.

[0033] In a further preferred embodiment of the present invention, the fixing rod 24 is a rectangular wide plate, and a plurality of uniform material teeth 25 are provided, which are evenly distributed at the bottom of the fixing rod 24.

[0034] In this embodiment, the material can be evenly distributed by the material distribution teeth 25.

[0035] In a further preferred embodiment of the present invention, a filter screen 26 is fixedly connected to the lower part of the leaching reaction chamber 1. The bottom of the filter screen 26 is away from the bottom plate of the leaching reaction chamber 1, and the bottom of the uniform tooth 25 slides in contact with the top of the filter screen 26.

[0036] Example 2

[0037] Based on Example 1, a preferred embodiment of the filter residue recycling device using manganese carbonate ore as an acid recovery auxiliary material provided by this utility model is as follows: Figures 1 to 5 As shown: A material collection pump 5 is installed between the leaching reaction chamber 1 and the acid recovery reaction chamber 2. The leaching reaction chamber 1 and the acid recovery reaction chamber 2 are interconnected through the material collection pump 5. Support frames 4 are evenly distributed on the top edge of the acid recovery reaction chamber 2. The top of the support frames 4 is fixedly connected to the leaching reaction chamber 1.

[0038] In this embodiment, the feeding pump 5 can be used to feed materials into the acid recovery reaction chamber 2.

[0039] In a further preferred embodiment of this utility model, feed hoppers 6 are fixedly connected to both sides of the acid recovery reaction chamber 2, and feed valves 7 are fixedly connected inside the feed hoppers 6. The feed valves 7 are adapted to open and close the feed hoppers 6 to feed materials.

[0040] In this embodiment, the feed hopper 6 enables the input of manganese carbonate ore powder into the acid recovery reaction chamber 2.

[0041] In a further preferred embodiment of this utility model, a second collection pump 8 is provided between the acid recovery reaction chamber 2 and the secondary filter press 3, the second collection pump 8 connects the acid recovery reaction chamber 2 and the secondary filter press 3, and a support frame 4 is provided between the acid recovery reaction chamber 2 and the secondary filter press 3.

[0042] In a further preferred embodiment of the present invention, a neutralization chamber 17 is fixedly connected to one side of the secondary filter press 3, the neutralization chamber 17 is connected to the secondary filter press 3, a material collection pump 4 16 is provided on one side of the neutralization chamber 17, the material collection pump 4 16 is connected to the interior of the secondary filter press 3, and a material collection pump 5 18 is provided on the other side of the neutralization chamber 17.

[0043] In this embodiment, the neutralization chamber 17 can neutralize the liquid filtered out in the second stage, and the liquid is fed into the collection pump 4 16 and discharged by the collection pump 5 18.

[0044] In a further preferred embodiment of the present invention, a support rod 19 is fixedly connected to the bottom of the pulping chamber 12, and the bottom of the support rod 19 is on the same horizontal plane as the bottom of the secondary filter press 3.

[0045] In a further preferred embodiment of this utility model, filter screen 10 separates the upper and lower sides of the secondary filter chamber 3, and the lower side of the inclined direction of filter screen 10 is located on one side of the slurry chamber 12, and the bottom of the neutralization chamber 17 is in contact with the bottom surface.

[0046] The working principle of this practical system is as follows: Manganese ore undergoes leaching reaction inside the leaching reaction chamber 1. After being turned by the fixed rod 24, it undergoes multiple pressure filtrations. After the pressure filtration is completed, the filtrate still contains a certain amount of residual acid, which is discharged into the acid recovery reaction chamber 2 by the collection pump 5 at the bottom of the leaching reaction chamber 1. The manganese carbonate ore powder is fed into the acid recovery reaction chamber 2 by the feed hoppers 6 on both sides of the acid recovery reaction chamber 2 for acid recovery, avoiding the introduction of new impurities. After the filter residue is filtered out for the second time, the waste residue is filtered by the filter screen 10 and retained at the top of the filter screen 10 before entering the pulping chamber 12. The motor 20 is started to cause the pulping stirring blades 21 to break the pulped filter residue. The pulped filter residue is filtered by the pulping filter screen 13 and pumped into the leaching reaction chamber 1 by the collection pump 3 15 for continued use as raw material in the leaching section, achieving the purpose of recycling. The liquid filtered out for the second time is neutralized by the neutralization chamber 17, and the liquid is fed in by the collection pump 4 16 and discharged by the collection pump 5 18.

[0047] The above are merely preferred embodiments of the present utility model and are 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 shall be included within the protection scope of the present utility model.

Claims

1. A device for recycling filter residue from manganese carbonate ore as an acid-collecting auxiliary material, characterized in that, The leaching reaction chamber (1) includes an acid recovery reaction chamber (2) at the bottom of the leaching reaction chamber (1). A secondary filter press chamber (3) is fixedly connected to the bottom of the acid recovery reaction chamber (2). The leaching reaction chamber (1), the acid recovery reaction chamber (2), and the secondary filter press chamber (3) are interconnected. A slurry chamber (12) is fixedly connected to one side of the secondary filter press chamber (3). A motor (20) is fixedly connected to the bottom of the slurry chamber (12). A slurry stirring blade (21) is fixedly connected to the output end of the motor (20). A slurry filter screen (13) is fixedly connected to the middle position inside the slurry chamber (12). The slurry filter screen (13) separates the chambers on both sides inside the slurry chamber (12). The motor (20) is located below one side of the slurry filter screen (13). A conveying pipe (14) is located above the other side of the slurry chamber (12). A collection pump (15) is fixedly connected to the top of the conveying pipe (14). The top of the conveying pipe (14) is connected to the interior of the leaching reaction chamber (1). A filter screen (10) is fixedly connected to the top of the interior of the secondary filter chamber (3). The filter screen (10) is set at an angle. A collection port (11) is set on one side of the slurry chamber (12). The collection port (11) is connected to the chamber on the side where the slurry stirring blade (21) is located. The collection port (11) is connected to the bottom of the angled position of the filter screen (10).

2. The filter residue recycling device for using manganese carbonate ore as an acid recovery auxiliary material according to claim 1, characterized in that, A material inlet (9) is fixedly connected to one side of the leaching reaction chamber (1), a motor (22) is fixedly connected to the top of the leaching reaction chamber (1), a stirring rod (23) is fixedly connected to the output end of the motor (22), a fixing rod (24) is fixedly connected to the other end of the stirring rod (23), a uniform tooth (25) is fixedly connected to the bottom of the fixing rod (24), and a filter screen (26) is provided at the bottom of the uniform tooth (25).

3. A filter residue recycling device for using manganese carbonate ore as an acid recovery auxiliary material according to claim 2, characterized in that, The fixing rod (24) is a rectangular wide plate, and the number of the material leveling teeth (25) is set to multiple, with the multiple material leveling teeth (25) being evenly distributed at the bottom of the fixing rod (24).

4. A filter residue recycling device for using manganese carbonate ore as an acid recovery auxiliary material according to claim 2, characterized in that, A filter screen two (26) is fixedly connected to the lower part of the leaching reaction chamber (1). The bottom of the filter screen two (26) is far away from the bottom plate of the leaching reaction chamber (1), and the bottom of the uniform tooth (25) slides in contact with the top of the filter screen two (26).

5. A filter residue recycling device for using manganese carbonate ore as an acid recovery auxiliary material according to claim 4, characterized in that, A collection pump (5) is provided between the leaching reaction chamber (1) and the acid recovery reaction chamber (2). The leaching reaction chamber (1) and the acid recovery reaction chamber (2) are interconnected by the collection pump (5). Support frames (4) are distributed at equal intervals along the top edge of the acid recovery reaction chamber (2). The top of the support frame (4) is fixedly connected to the leaching reaction chamber (1).

6. A filter residue recycling device for using manganese carbonate ore as an acid recovery auxiliary material according to claim 5, characterized in that, Both sides of the acid recovery reaction chamber (2) are fixedly connected to a feed hopper (6), and a feed valve (7) is fixedly connected inside the feed hopper (6). The feed valve (7) is adapted to open and close the feed hopper (6) to feed the material.

7. A filter residue recycling device for using manganese carbonate ore as an acid recovery auxiliary material according to claim 6, characterized in that, A second collection pump (8) is provided between the acid recovery reaction chamber (2) and the secondary filter press chamber (3). The second collection pump (8) connects the acid recovery reaction chamber (2) and the secondary filter press chamber (3). A support frame (4) is provided between the acid recovery reaction chamber (2) and the secondary filter press chamber (3).

8. A filter residue recycling device for using manganese carbonate ore as an acid recovery auxiliary material according to claim 7, characterized in that, A neutralization chamber (17) is fixedly connected to one side of the secondary filter press (3). The neutralization chamber (17) is connected to the secondary filter press (3). A collection pump four (16) is provided on one side of the neutralization chamber (17). The collection pump four (16) is connected to the interior of the secondary filter press (3). A collection pump five (18) is provided on the other side of the neutralization chamber (17).

9. A filter residue recycling device for using manganese carbonate ore as an acid recovery auxiliary material according to claim 8, characterized in that, The bottom of the pulping chamber (12) is fixedly connected to a support rod (19), and the bottom of the support rod (19) is on the same horizontal plane as the bottom of the secondary filter press chamber (3).

10. A filter residue recycling device for using manganese carbonate ore as an acid recovery auxiliary material according to claim 8, characterized in that, The filter screen (10) separates the upper and lower sides of the secondary filter chamber (3). The lower side of the filter screen (10) is located on one side of the pulping chamber (12) in the inclined direction. The bottom of the neutralization chamber (17) is in contact with the bottom surface.

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