CN116764324A - Precious metal slurry concentration washing filtration system, method and application - Google Patents
Precious metal slurry concentration washing filtration system, method and application Download PDFInfo
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- CN116764324A CN116764324A CN202310765314.XA CN202310765314A CN116764324A CN 116764324 A CN116764324 A CN 116764324A CN 202310765314 A CN202310765314 A CN 202310765314A CN 116764324 A CN116764324 A CN 116764324A
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- filtering
- ammonia
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- metal slurry
- precious metal
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- 238000001914 filtration Methods 0.000 title claims abstract description 87
- 239000002002 slurry Substances 0.000 title claims abstract description 43
- 239000010970 precious metal Substances 0.000 title claims abstract description 37
- 238000005406 washing Methods 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 title claims abstract description 15
- 239000007788 liquid Substances 0.000 claims abstract description 98
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 98
- 229910001868 water Inorganic materials 0.000 claims abstract description 98
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims abstract description 84
- 229910021529 ammonia Inorganic materials 0.000 claims abstract description 42
- 239000002351 wastewater Substances 0.000 claims abstract description 28
- 229910002651 NO3 Inorganic materials 0.000 claims abstract description 23
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 claims abstract description 23
- 229910000510 noble metal Inorganic materials 0.000 claims abstract description 15
- 238000004519 manufacturing process Methods 0.000 claims abstract description 8
- 230000009615 deamination Effects 0.000 claims description 33
- 238000006481 deamination reaction Methods 0.000 claims description 33
- 239000012528 membrane Substances 0.000 claims description 33
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 8
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 8
- 239000013078 crystal Substances 0.000 claims description 8
- 238000004891 communication Methods 0.000 claims description 6
- 239000012141 concentrate Substances 0.000 claims description 3
- 238000001728 nano-filtration Methods 0.000 claims description 3
- 238000010926 purge Methods 0.000 claims 3
- 238000003912 environmental pollution Methods 0.000 abstract description 3
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 12
- 238000011001 backwashing Methods 0.000 description 5
- 229910052709 silver Inorganic materials 0.000 description 5
- 239000004332 silver Substances 0.000 description 5
- 239000000843 powder Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 1
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000012065 filter cake Substances 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The application provides a precious metal slurry concentration, washing and filtering system, a method and application thereof; it comprises the following steps: a raw liquid tank for receiving a noble metal slurry and clear water; the filtering assembly comprises a filtering inlet, a first filtering outlet and a second filtering outlet, the filtering inlet is connected with the outlet of the raw liquid tank through a circulating pump, and the first filtering outlet is communicated with the inlet of the raw liquid tank; and an inlet of the ammonia-containing wastewater zero-emission system is communicated with the second filtering outlet so as to receive the liquid discharged by the second filtering outlet and separate the liquid into nitrate and clear water without ammonia. The application integrates concentration, washing and water treatment, the washing and concentration processes are continuous and uninterrupted, the efficiency of noble metal manufacturing process is greatly improved, zero emission can be realized, and environmental pollution is reduced.
Description
Technical Field
The application relates to the field of industrial metal preparation, in particular to a precious metal slurry concentration, washing and filtering system, a precious metal slurry concentration, washing and filtering method and application.
Background
In noble metal processes, metal powders are mixed with liquids in many steps and are present in the form of a slurry; for example, in industrial silver production, silver powder is usually in liquid, and often silver powder, nitrate, ammonia water and the like are mixed together, if the silver powder is not separated from the silver powder, the purity of the finished silver is finally directly affected.
If silver powder is separated, the silver-containing liquid is required to be washed and filtered until the substance components in the filtrate reach the standards, and the subsequent treatment can be performed, and the centrifuge is difficult to filter the silver powder because the precious metal powder such as the silver powder is thinner. In addition, the liquid with the components reaching the standards is subjected to concentration treatment, so that the concentration of silver in the liquid is increased, and the treatment capacity of subsequent operation is reduced. And the washing water still has recovery value, and if the washing water is discharged, pollution can be caused, and resource waste can be caused.
In the prior art, no system capable of integrating washing, concentration and water treatment of noble metal slurry exists, and the above problems are technical problems to be solved in the field.
Disclosure of Invention
The application mainly solves the technical problem of providing a precious metal slurry concentration washing and filtering system, a method and application which can wash, concentrate and treat precious metal slurry into a whole, so as to improve the efficiency of precious metal manufacturing process.
According to a first aspect, the present application provides a precious metal slurry concentrating, washing and filtering system comprising: a raw liquid tank for receiving a noble metal slurry and clear water; preferably, the clean water injected into the raw liquid tank is pure water;
the filtering assembly comprises a filtering inlet, a first filtering outlet and a second filtering outlet, the filtering inlet is connected with the outlet of the raw liquid tank through a circulating pump, and the first filtering outlet is communicated with the inlet of the raw liquid tank;
and an inlet of the ammonia-containing wastewater zero-emission system is communicated with the second filtering outlet so as to receive the liquid discharged by the second filtering outlet and separate the liquid into nitrate and clear water without ammonia.
In an alternative embodiment, the ammonia-containing wastewater zero release system comprises: a membrane concentration assembly for receiving the liquid discharged from the second filtration outlet to separate the liquid into ammonia-free clean water and ammonia, nitrate-containing concentrate;
a deamination device connected with the membrane concentration assembly for receiving the concentrated water separated by the membrane concentration assembly and removing ammonia water therein;
and the MVR equipment is connected with the deamination equipment to receive the concentrated water passing through the deamination equipment and separate the concentrated water into nitrate crystals and clear water.
In an alternative embodiment, the membrane concentration assembly comprises a nanofiltration membrane; and/or the deamination apparatus comprises a deamination column.
In an alternative embodiment, the ammonia-containing wastewater zero release system further comprises a clean water tank connected to the membrane concentration module and the MVR device, respectively, to receive clean water discharged by the membrane concentration module and the MVR device.
In an alternative embodiment, the filter further comprises a clean water valve, the second filter outlet is communicated with the clean water valve, and the clean water valve is used for controlling the on-off of the filter assembly and the washing water tank.
In an alternative embodiment, a backwash line is also included in communication with the line between the filter assembly and the clean water valve to backwash the filter assembly.
In an alternative embodiment, the system further comprises a wash tank, the filter assembly and the ammonia-containing wastewater zero release system are in communication via the wash tank, the wash tank being configured to receive liquid discharged from the second filter outlet.
According to a second aspect, the application provides a precious metal slurry concentration washing filtration method based on the precious metal slurry concentration washing filtration system, which comprises the following steps:
injecting noble metal slurry into the raw liquid tank to enable the liquid level in the raw liquid tank to reach a set position;
the raw liquid tank is communicated with the filtering assembly, so that precious metal slurry circulates between the raw liquid tank and the filtering assembly, meanwhile, clear water is injected into the raw liquid tank, and the second filtering outlet is opened according to the flow of the injected clear water until all indexes of liquid flowing out of the second filtering outlet reach set values; preferably, the clean water injected into the raw liquid tank is pure water;
stopping injecting clear water into the raw liquid tank, keeping the second filtering outlet open until the liquid level in the raw liquid tank is reduced to a set value, and completing concentration;
and (3) introducing the liquid discharged from the second filtering outlet into an ammonia-containing wastewater zero discharge system for deamination treatment to obtain clear water and nitrate.
In an alternative embodiment, the liquid flowing out of the second filtering outlet is led to an ammonia-containing wastewater zero-emission system for deamination treatment, which comprises the following steps:
introducing the liquid discharged from the second filtering outlet into a membrane concentration assembly, and separating the liquid into clear water without ammonia and concentrated water with ammonia and nitrate by the membrane concentration assembly;
introducing the concentrated water into deamination equipment to remove ammonia water in the concentrated water;
and (3) introducing the deaminated concentrated water into MVR equipment to separate the concentrated water into nitrate crystals and clear water.
According to a third aspect, the present application provides a use of the precious metal slurry concentrating, washing and filtering system described above in precious metal manufacturing processes.
The application has the beneficial effects that: the application integrates concentration, washing and water treatment, the washing and concentration processes are continuous and uninterrupted, the efficiency of noble metal manufacturing process is greatly improved, zero emission can be realized, and environmental pollution is reduced.
Drawings
FIG. 1 is a schematic diagram of an overall pipeline according to an embodiment of the present application;
FIG. 2 is a schematic diagram of a system for zero emission of wastewater containing ammonia in an embodiment of the application.
Reference numerals: the device comprises a raw liquid tank 1, a raw liquid pipeline 11, a clear water pipeline 12, a filter assembly 2, a drainage pipeline 21, a water washing tank 3, an ammonia-containing wastewater zero discharge system 4, a membrane concentration assembly 41, a deamination device 42, an MVR device 43, a clear water tank 44, a backwashing pipeline 5, a clear water valve 6 and a circulating pump 7.
Detailed Description
The application will be described in further detail below with reference to the drawings by means of specific embodiments. Wherein like elements in different embodiments are numbered alike in association. In the following embodiments, numerous specific details are set forth in order to provide a better understanding of the present application. However, one skilled in the art will readily recognize that some of the features may be omitted, or replaced by other elements, materials, or methods in different situations. In some instances, related operations of the present application have not been shown or described in the specification in order to avoid obscuring the core portions of the present application, and may be unnecessary to persons skilled in the art from a detailed description of the related operations, which may be presented in the description and general knowledge of one skilled in the art.
Furthermore, the described features, operations, or characteristics of the description may be combined in any suitable manner in various embodiments. Also, various steps or acts in the method descriptions may be interchanged or modified in a manner apparent to those of ordinary skill in the art. Thus, the various orders in the description and drawings are for clarity of description of only certain embodiments, and are not meant to be required orders unless otherwise indicated.
The numbering of the components itself, e.g. "first", "second", etc., is used herein merely to distinguish between the described objects and does not have any sequential or technical meaning. The term "coupled" as used herein includes both direct and indirect coupling (coupling), unless otherwise indicated.
The application discloses a precious metal slurry concentration washing filtration system as shown in fig. 1, which comprises: a raw liquid tank 1, a filtering component 2 and an ammonia-containing wastewater zero discharge system 4.
Wherein the raw liquid tank 1 is used for receiving precious metal slurry and clear water, for example, the raw liquid tank 1 can be a liquid storage tank which is provided with an inlet and an outlet, and the inlet of the raw liquid tank 1 is connected with a raw liquid pipeline 11 and a clear water pipeline 12; the raw liquid pipeline 11 is used for receiving precious metal slurry, the precious metal slurry can be injected into the raw liquid tank 1 by switching the raw liquid pipeline 11, the clear water pipeline 12 is used for receiving clear water, and the clear water can be injected into the raw liquid tank 1 by switching the clear water pipeline 12.
In the embodiment of the present disclosure, the filter assembly 2 is a physical filter assembly 2, and the filter assembly 2 may be, for example, a filter screen, a filter plate, or the like; the filter assembly 2 is provided with a filter inlet, a first filter outlet and a second filter outlet, and the first filter outlet and the second filter outlet can be respectively and independently opened and closed; in the concrete implementation, the filtering inlet is connected with the outlet of the raw liquid tank 1 through the circulating pump 7, and the first filtering outlet is communicated with the inlet of the raw liquid tank 1, so that the outlet end of the raw liquid tank 1, the filtering inlet, the first filtering outlet and the inlet of the raw liquid tank 1 are sequentially communicated to form a circulating pipeline. For example, the circulating pump may employ a maximum flow rate of 25m 3 A centrifugal pump/h.
The inlet of the ammonia-containing wastewater zero-emission system 4 is communicated with the second filtering outlet so as to receive the liquid discharged from the second filtering outlet, and the liquid discharged from the second outlet can be separated into nitrate crystals and clear water without ammonia through the ammonia-containing wastewater zero-emission system 4 so as to recover the product. It is understood that the ammonia-containing wastewater zero release system 4 described above may employ a known ammonia-containing wastewater zero release system 4.
The working flow of the application is as follows: injecting noble metal slurry into the raw liquid tank 1 to enable the liquid level in the raw liquid tank 1 to reach a set position; the raw liquid tank 1 is communicated with the filter assembly 2, so that precious metal slurry circulates between the raw liquid tank 1 and the filter assembly 2, meanwhile, clear water is injected into the raw liquid tank 1, and a second filter outlet is opened according to the flow of the injected clear water until all indexes of liquid flowing out of the second filter outlet reach set values, namely the concentration of nitrate and ammonia water in the liquid flowing out of the second filter outlet is reduced to be lower than the treatable concentration; then stopping injecting clear water into the raw liquid tank 1, and keeping the second filtering outlet open, wherein the precious metal slurry in the raw liquid tank 1 continuously passes through the filtering component 2, the liquid phase in the precious metal slurry is discharged through the second filtering outlet, and the solid phase powder in the precious metal slurry is trapped in the raw liquid tank 1 until the liquid level in the raw liquid tank 1 is reduced to a set value, so that concentration is completed; and finally, introducing the liquid discharged from the second filtering outlet into an ammonia-containing wastewater zero-emission system 4 for deamination treatment to obtain clear water and nitrate.
In a specific example, taking 200L silver paste as an example, the flow rate of the circulating pump is 25m 3 /h; the filter component 2 is a cross-flow filter, the treatment capacity is 20L/h, and the filter precision is 0.1 mu m; the filter element can adopt a tubular filter element (double-port), 316L stainless steel, the specification phi is 25 x 1000, and the number is 3; during filtration, the membrane surface flow rate of the filter component 2 can be controlled to be 4m/s, and the filtration pressure is less than 0.2Mpa; and (5) washing for 50 hours in an accumulated way, and enabling the clear liquid discharged through the second filtering port to reach the production standard. And concentrating for 5 hours, wherein the solid content of the noble metal slurry is improved by 1 time.
The application integrates the concentration, washing and water treatment of the noble metal slurry, has simple and efficient operation, and the washing and concentration processes are continuous and uninterrupted. Can realize high-precision filtration and avoid the loss of precious metals caused by filtration.
In some alternative embodiments, as shown in fig. 2, the ammonia-containing wastewater zero release system 4 described above is comprised of a membrane concentration module 41, a deamination device 42, and a MVR device 43. Wherein the membrane concentration module 41, the deamination device 42 and the MVR device 43 are connected in sequence; in some specific examples, the ammonia-containing wastewater zero release system 4 further includes a clean water tank 44 to receive the clean water discharged by the membrane concentration assembly 41 and the MVR device 43.
In a specific embodiment, the membrane concentration assembly 41 is configured to receive the liquid discharged from the second filtering outlet, so as to separate the liquid into clean water free of ammonia and concentrated water containing ammonia and nitrate; for example, the membrane concentration assembly 41 may be, but is not limited to, a nanofiltration membrane. The inlet of the deamination device 42 is connected to the membrane concentration assembly 41 for receiving the concentrated water separated by the membrane concentration assembly 41 and removing the ammonia therefrom, and for example, the deamination device 42 may be a deamination tower or other known deamination device 42, the inlet of the deamination tower is connected to the concentrated water outlet of the membrane concentration assembly 41, and the outlet of the deamination tower is connected to the MVR device 43. The MVR device 43 is used for receiving the concentrated water passing through the deamination device 42 and separating the concentrated water into nitrate crystals and clear water, and the MVR is a vapor recompression technology, which compresses the secondary vapor generated by the evaporator to a higher pressure by a mechanically driven compressor in a micro-vacuum state to improve the quality of the vapor, and the secondary vapor enters the evaporator to circulate to perform low-temperature evaporation treatment on the solution or wastewater to be treated.
The ammonia-containing wastewater zero-emission system 4 comprises the following steps when deamination treatment is carried out:
the liquid discharged from the second filtering outlet is led into the membrane concentration component 41, and the membrane concentration component 41 can pass through clean water but can not pass through ammonia water, so that the liquid discharged from the second filtering outlet can be separated into clean water without ammonia, concentrated water with ammonia and nitrate by the membrane concentration component 41; the concentrated water separated by the membrane concentration module 41 is then introduced into the deamination device 42 to remove ammonia water in the concentrated water, wherein the deamination device 42 is different based on its selection, for example, when the deamination device 42 adopts a deamination tower, ammonia nitrogen in the water is converted into harmless nitrogen by ammonium sulfate salt; after deamination of the concentrated water, the rest of nitrate is remained, and the deaminated concentrated water is introduced into the MVR device 43, and the concentrated water is separated into nitrate crystals and clear water by the MVR device 43, so that the clear water and the nitrate crystals can be recovered, and zero emission is realized.
In some alternative embodiments, to facilitate the re-operation of the filter assembly 2, a backwash line 5 is also included, the backwash line 5 being in line communication with the filter assembly 2 and the zero wastewater discharge system 4 containing ammonia to backwash the filter assembly 2; for example, in order to facilitate the control of the opening and closing of the second outlet of the filter assembly 2, a filter drain pipeline 21 is connected to the outside of the second outlet, a clear liquid valve is arranged on the filter drain pipeline 21 to control the opening and closing of the second filter outlet, and the backwash pipeline 5 is communicated with the filter drain pipeline 21 and the communication position is located between the clear liquid valve and the filter assembly 2. When backwashing is carried out, only the clear liquid valve is required to be closed, then the backwashing pipeline 5 is opened, so that one end of the backwashing pipeline 5, which is far away from the drainage pipeline 21, is connected with clear water, at the moment, the clear water entering the backwashing pipeline 5 can wash the filter assembly 2, filter cake residues remained on the surface of the filter element of the filter assembly 2 are eliminated, and the flux of the filter assembly 2 is recovered.
In an alternative embodiment, a sink 3 is also provided in order to facilitate collection of liquid discharged through the second filter outlet of the filter assembly 2; specifically, the water washing tank 3 is located between the filter assembly 2 and the ammonia-containing wastewater zero-discharge system 4, the filter assembly 2 and the ammonia-containing wastewater zero-discharge system 4 are communicated through the water washing tank 3, and the water washing tank 3 is used for receiving the liquid discharged from the second filtering outlet.
It should be understood that although the present application is not particularly limited, one or more valves are also disposed between each device, system or pipeline in order to control the on-off of each device, system or pipeline.
The noble metal slurry concentration, washing and filtering system and the method provided by the application are simple and efficient to operate, and the washing and concentrating processes are continuous and uninterrupted; high-precision filtration can be realized, and loss of precious metals caused by filtration is avoided; zero emission can be realized by the whole system, resource recovery is realized, and environmental pollution is reduced; has wide application prospect in noble metal manufacturing process.
The foregoing description of the application has been presented for purposes of illustration and description, and is not intended to be limiting. Several simple deductions, modifications or substitutions may also be made by a person skilled in the art to which the application pertains, based on the idea of the application.
Claims (10)
1. A precious metal slurry concentrating, washing and filtering system, comprising: a raw liquid tank for receiving a noble metal slurry and clear water;
the filtering assembly comprises a filtering inlet, a first filtering outlet and a second filtering outlet, the filtering inlet is connected with the outlet of the raw liquid tank through a circulating pump, and the first filtering outlet is communicated with the inlet of the raw liquid tank;
and an inlet of the ammonia-containing wastewater zero-emission system is communicated with the second filtering outlet so as to receive the liquid discharged by the second filtering outlet and separate the liquid into nitrate and clear water without ammonia.
2. The precious metal slurry concentrating, washing and filtering system according to claim 1, wherein said ammonia-containing wastewater zero-emission system comprises: a membrane concentration assembly for receiving the liquid discharged from the second filtration outlet to separate the liquid into ammonia-free clean water and ammonia, nitrate-containing concentrate;
a deamination device connected with the membrane concentration assembly for receiving the concentrated water separated by the membrane concentration assembly and removing ammonia water therein;
and the MVR equipment is connected with the deamination equipment to receive the concentrated water passing through the deamination equipment and separate the concentrated water into nitrate crystals and clear water.
3. The precious metal slurry concentrating, washing and filtering system of claim 2, wherein said membrane concentrating assembly comprises a nanofiltration membrane; and/or the deamination apparatus comprises a deamination column.
4. The precious metal slurry concentrating, washing and filtering system of claim 2, wherein said ammonia-containing wastewater zero-emission system further comprises a clean water tank connected to said membrane concentrating module and said MVR device, respectively, to receive clean water discharged by said membrane concentrating module and said MVR device.
5. The precious metal slurry concentrating wash filtration system of any of claims 1-4, further comprising a purge valve, said second filter outlet in communication with a purge valve, said purge valve for controlling the on-off between said filter assembly and said wash tank.
6. The precious metal slurry concentrating wash filtration system of claim 5, further comprising a backwash line in communication with the line between the filter assembly and the clean water valve to backwash the filter assembly.
7. A precious metal slurry concentrating, washing and filtering system according to any one of claims 1 to 4, further comprising a wash basin, said filter assembly and said ammonia-containing wastewater zero discharge system communicating through a wash basin for receiving liquid discharged from said second filter outlet.
8. A precious metal slurry concentration washing filtration method based on the precious metal slurry concentration washing filtration system according to any one of claims 1 to 7, characterized by comprising the steps of:
injecting noble metal slurry into the raw liquid tank to enable the liquid level in the raw liquid tank to reach a set position;
the raw liquid tank is communicated with the filtering assembly, so that precious metal slurry circulates between the raw liquid tank and the filtering assembly, meanwhile, clear water is injected into the raw liquid tank, and the second filtering outlet is opened according to the flow of the injected clear water until all indexes of liquid flowing out of the second filtering outlet reach set values;
stopping injecting clear water into the raw liquid tank, keeping the second filtering outlet open until the liquid level in the raw liquid tank is reduced to a set value, and completing concentration;
and (3) introducing the liquid discharged from the second filtering outlet into an ammonia-containing wastewater zero discharge system for deamination treatment to obtain clear water and nitrate.
9. The method for concentrating, washing and filtering noble metal slurry according to claim 8, wherein the liquid flowing out of the second filtering outlet is led into an ammonia-containing wastewater zero-emission system for deamination treatment, and the method comprises the following steps:
introducing the liquid discharged from the second filtering outlet into a membrane concentration assembly, and separating the liquid into clear water without ammonia and concentrated water with ammonia and nitrate by the membrane concentration assembly;
introducing the concentrated water into deamination equipment to remove ammonia water in the concentrated water;
and (3) introducing the deaminated concentrated water into MVR equipment to separate the concentrated water into nitrate crystals and clear water.
10. Use of a precious metal slurry concentrating, washing and filtering system according to any one of claims 1 to 7 in precious metal manufacturing processes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310765314.XA CN116764324A (en) | 2023-06-26 | 2023-06-26 | Precious metal slurry concentration washing filtration system, method and application |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310765314.XA CN116764324A (en) | 2023-06-26 | 2023-06-26 | Precious metal slurry concentration washing filtration system, method and application |
Publications (1)
| Publication Number | Publication Date |
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| CN116764324A true CN116764324A (en) | 2023-09-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310765314.XA Pending CN116764324A (en) | 2023-06-26 | 2023-06-26 | Precious metal slurry concentration washing filtration system, method and application |
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| Country | Link |
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| CN (1) | CN116764324A (en) |
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2023
- 2023-06-26 CN CN202310765314.XA patent/CN116764324A/en active Pending
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