CN112063837A - Method and system for rapid gravity settling of slurry - Google Patents
Method and system for rapid gravity settling of slurry Download PDFInfo
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- CN112063837A CN112063837A CN202010791260.0A CN202010791260A CN112063837A CN 112063837 A CN112063837 A CN 112063837A CN 202010791260 A CN202010791260 A CN 202010791260A CN 112063837 A CN112063837 A CN 112063837A
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- liquid
- acid
- slurry
- clear liquid
- unreacted
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- 239000002002 slurry Substances 0.000 title claims abstract description 51
- 230000005484 gravity Effects 0.000 title claims abstract description 33
- 239000007788 liquid Substances 0.000 claims abstract description 135
- 239000007787 solid Substances 0.000 claims abstract description 50
- 238000000926 separation method Methods 0.000 claims abstract description 48
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 42
- 238000006243 chemical reaction Methods 0.000 claims abstract description 35
- 239000002245 particle Substances 0.000 claims abstract description 34
- CURLTUGMZLYLDI-UHFFFAOYSA-N carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 32
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 32
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 32
- 239000002994 raw material Substances 0.000 claims abstract description 19
- 238000002156 mixing Methods 0.000 claims abstract description 8
- 239000002699 waste material Substances 0.000 claims description 23
- 239000002253 acid Substances 0.000 claims description 18
- 239000003153 chemical reaction reagent Substances 0.000 claims description 18
- 239000002440 industrial waste Substances 0.000 claims description 18
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 18
- 239000002562 thickening agent Substances 0.000 claims description 16
- 229910001416 lithium ion Inorganic materials 0.000 claims description 13
- QTBSBXVTEAMEQO-UHFFFAOYSA-N acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 12
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 12
- BDAGIHXWWSANSR-UHFFFAOYSA-N formic acid Chemical compound OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 claims description 12
- MUBZPKHOEPUJKR-UHFFFAOYSA-N oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 claims description 12
- XBDQKXXYIPTUBI-UHFFFAOYSA-N propionic acid Chemical compound CCC(O)=O XBDQKXXYIPTUBI-UHFFFAOYSA-N 0.000 claims description 12
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium Ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 claims description 10
- 238000004064 recycling Methods 0.000 claims description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 9
- WMFOQBRAJBCJND-UHFFFAOYSA-M lithium hydroxide Chemical compound [Li+].[OH-] WMFOQBRAJBCJND-UHFFFAOYSA-M 0.000 claims description 9
- 230000014759 maintenance of location Effects 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 9
- -1 tailings Substances 0.000 claims description 9
- FERIUCNNQQJTOY-UHFFFAOYSA-N Butanoic acid Chemical compound CCCC(O)=O FERIUCNNQQJTOY-UHFFFAOYSA-N 0.000 claims description 8
- RGHNJXZEOKUKBD-SQOUGZDYSA-N Gluconic acid Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C(O)=O RGHNJXZEOKUKBD-SQOUGZDYSA-N 0.000 claims description 8
- 229910000831 Steel Inorganic materials 0.000 claims description 8
- KDYFGRWQOYBRFD-UHFFFAOYSA-N Succinic acid Chemical compound OC(=O)CCC(O)=O KDYFGRWQOYBRFD-UHFFFAOYSA-N 0.000 claims description 8
- NQPDZGIKBAWPEJ-UHFFFAOYSA-N Valeric acid Chemical compound CCCCC(O)=O NQPDZGIKBAWPEJ-UHFFFAOYSA-N 0.000 claims description 8
- VTYYLEPIZMXCLO-UHFFFAOYSA-L calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 8
- 150000007524 organic acids Chemical group 0.000 claims description 8
- NBIIXXVUZAFLBC-UHFFFAOYSA-N phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 8
- 239000002893 slag Substances 0.000 claims description 8
- 239000010959 steel Substances 0.000 claims description 8
- UGFAIRIUMAVXCW-UHFFFAOYSA-N carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 7
- 239000003546 flue gas Substances 0.000 claims description 7
- 229910052742 iron Inorganic materials 0.000 claims description 7
- 239000007789 gas Substances 0.000 claims description 6
- 239000011268 mixed slurry Substances 0.000 claims description 6
- 229960003563 Calcium Carbonate Drugs 0.000 claims description 4
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 4
- 229960002989 Glutamic Acid Drugs 0.000 claims description 4
- WHUUTDBJXJRKMK-VKHMYHEASA-N L-glutamic acid Chemical compound OC(=O)[C@@H](N)CCC(O)=O WHUUTDBJXJRKMK-VKHMYHEASA-N 0.000 claims description 4
- 229960000448 Lactic acid Drugs 0.000 claims description 4
- 229960004838 Phosphoric acid Drugs 0.000 claims description 4
- XNGIFLGASWRNHJ-UHFFFAOYSA-N Phthalic acid Chemical compound OC(=O)C1=CC=CC=C1C(O)=O XNGIFLGASWRNHJ-UHFFFAOYSA-N 0.000 claims description 4
- SIOXPEMLGUPBBT-UHFFFAOYSA-N Picolinic acid Chemical compound OC(=O)C1=CC=CC=N1 SIOXPEMLGUPBBT-UHFFFAOYSA-N 0.000 claims description 4
- XPPKVPWEQAFLFU-UHFFFAOYSA-N Pyrophosphoric acid Chemical compound OP(O)(=O)OP(O)(O)=O XPPKVPWEQAFLFU-UHFFFAOYSA-N 0.000 claims description 4
- 229960005137 Succinic Acid Drugs 0.000 claims description 4
- 235000015450 Tilia cordata Nutrition 0.000 claims description 4
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 4
- CIWBSHSKHKDKBQ-JLAZNSOCSA-N Vitamin C Chemical compound OC[C@H](O)[C@H]1OC(=O)C(O)=C1O CIWBSHSKHKDKBQ-JLAZNSOCSA-N 0.000 claims description 4
- 235000011054 acetic acid Nutrition 0.000 claims description 4
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 4
- 235000010323 ascorbic acid Nutrition 0.000 claims description 4
- 229960005070 ascorbic acid Drugs 0.000 claims description 4
- 239000011668 ascorbic acid Substances 0.000 claims description 4
- 239000010882 bottom ash Substances 0.000 claims description 4
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 4
- 239000004568 cement Substances 0.000 claims description 4
- 239000003245 coal Substances 0.000 claims description 4
- 238000010276 construction Methods 0.000 claims description 4
- 239000010881 fly ash Substances 0.000 claims description 4
- 235000019253 formic acid Nutrition 0.000 claims description 4
- 239000000174 gluconic acid Substances 0.000 claims description 4
- 235000012208 gluconic acid Nutrition 0.000 claims description 4
- 229950006191 gluconic acid Drugs 0.000 claims description 4
- 235000013922 glutamic acid Nutrition 0.000 claims description 4
- 239000004220 glutamic acid Substances 0.000 claims description 4
- JVTAAEKCZFNVCJ-UHFFFAOYSA-N lactic acid Chemical compound CC(O)C(O)=O JVTAAEKCZFNVCJ-UHFFFAOYSA-N 0.000 claims description 4
- 239000004310 lactic acid Substances 0.000 claims description 4
- 235000014655 lactic acid Nutrition 0.000 claims description 4
- 239000004571 lime Substances 0.000 claims description 4
- 235000006408 oxalic acid Nutrition 0.000 claims description 4
- 229940081066 picolinic acid Drugs 0.000 claims description 4
- 235000019260 propionic acid Nutrition 0.000 claims description 4
- 229940005657 pyrophosphoric acid Drugs 0.000 claims description 4
- 150000003839 salts Chemical class 0.000 claims description 4
- 239000011780 sodium chloride Substances 0.000 claims description 4
- 239000001384 succinic acid Substances 0.000 claims description 4
- 229940005605 valeric acid Drugs 0.000 claims description 4
- AXCZMVOFGPJBDE-UHFFFAOYSA-L Calcium hydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 3
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate dianion Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 claims description 3
- ZLNQQNXFFQJAID-UHFFFAOYSA-L Magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 claims description 3
- RPASNPADOARUAP-UHFFFAOYSA-N [Mg++].[Ca++].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O Chemical compound [Mg++].[Ca++].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O RPASNPADOARUAP-UHFFFAOYSA-N 0.000 claims description 3
- 239000000920 calcium hydroxide Substances 0.000 claims description 3
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 3
- FBEDQOZZWWECAJ-UHFFFAOYSA-M calcium;magnesium;hydroxide Chemical compound [OH-].[Mg+2].[Ca+2] FBEDQOZZWWECAJ-UHFFFAOYSA-M 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxyl anion Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 claims description 3
- XGZVUEUWXADBQD-UHFFFAOYSA-L lithium carbonate Chemical compound [Li+].[Li+].[O-]C([O-])=O XGZVUEUWXADBQD-UHFFFAOYSA-L 0.000 claims description 3
- 229910052808 lithium carbonate Inorganic materials 0.000 claims description 3
- 239000001095 magnesium carbonate Substances 0.000 claims description 3
- 239000011776 magnesium carbonate Substances 0.000 claims description 3
- 229910000021 magnesium carbonate Inorganic materials 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 150000002739 metals Chemical class 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- HHSPVTKDOHQBKF-UHFFFAOYSA-J calcium;magnesium;dicarbonate Chemical compound [Mg+2].[Ca+2].[O-]C([O-])=O.[O-]C([O-])=O HHSPVTKDOHQBKF-UHFFFAOYSA-J 0.000 claims description 2
- OKYDTGSQPZBYTF-UHFFFAOYSA-J calcium;magnesium;disulfate Chemical compound [Mg+2].[Ca+2].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O OKYDTGSQPZBYTF-UHFFFAOYSA-J 0.000 claims description 2
- 239000000126 substance Substances 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 239000012066 reaction slurry Substances 0.000 abstract description 4
- 239000000047 product Substances 0.000 description 18
- 239000012535 impurity Substances 0.000 description 10
- 150000002500 ions Chemical class 0.000 description 10
- 229960005069 Calcium Drugs 0.000 description 6
- OYPRJOBELJOOCE-UHFFFAOYSA-N calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 6
- 239000011575 calcium Substances 0.000 description 6
- 229910052791 calcium Inorganic materials 0.000 description 6
- FYYHWMGAXLPEAU-UHFFFAOYSA-N magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 6
- 229910052749 magnesium Inorganic materials 0.000 description 6
- 239000011777 magnesium Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 239000002244 precipitate Substances 0.000 description 6
- 229910052799 carbon Inorganic materials 0.000 description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-N HCl Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 4
- KRHYYFGTRYWZRS-UHFFFAOYSA-N HF Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000009854 hydrometallurgy Methods 0.000 description 4
- 239000002910 solid waste Substances 0.000 description 4
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 3
- 229910001424 calcium ion Inorganic materials 0.000 description 3
- 238000005039 chemical industry Methods 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 3
- 229910052744 lithium Inorganic materials 0.000 description 3
- 229910001425 magnesium ion Inorganic materials 0.000 description 3
- 238000007670 refining Methods 0.000 description 3
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L Calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
- 230000002378 acidificating Effects 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminum Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000001112 coagulant Effects 0.000 description 2
- 239000000701 coagulant Substances 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 231100000078 corrosive Toxicity 0.000 description 2
- 231100001010 corrosive Toxicity 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 229960004887 ferric hydroxide Drugs 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- MSNWSDPPULHLDL-UHFFFAOYSA-K iron(3+);trihydroxide Chemical compound [OH-].[OH-].[OH-].[Fe+3] MSNWSDPPULHLDL-UHFFFAOYSA-K 0.000 description 2
- 238000002386 leaching Methods 0.000 description 2
- GRYLNZFGIOXLOG-UHFFFAOYSA-N nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 2
- 230000008929 regeneration Effects 0.000 description 2
- 238000011069 regeneration method Methods 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 229940095672 Calcium Sulfate Drugs 0.000 description 1
- 229940095643 calcium hydroxide Drugs 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000011068 load Methods 0.000 description 1
- 229960001708 magnesium carbonate Drugs 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006011 modification reaction Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/02—Apparatus therefor
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B26/00—Obtaining alkali, alkaline earth metals or magnesium
- C22B26/10—Obtaining alkali metals
- C22B26/12—Obtaining lithium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B26/00—Obtaining alkali, alkaline earth metals or magnesium
- C22B26/20—Obtaining alkaline earth metals or magnesium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B26/00—Obtaining alkali, alkaline earth metals or magnesium
- C22B26/20—Obtaining alkaline earth metals or magnesium
- C22B26/22—Obtaining magnesium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/04—Extraction of metal compounds from ores or concentrates by wet processes by leaching
- C22B3/16—Extraction of metal compounds from ores or concentrates by wet processes by leaching in organic solutions
- C22B3/1608—Leaching with acyclic or carbocyclic agents
- C22B3/1616—Leaching with acyclic or carbocyclic agents of a single type
- C22B3/165—Leaching with acyclic or carbocyclic agents of a single type with organic acids
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/20—Treatment or purification of solutions, e.g. obtained by leaching
- C22B3/22—Treatment or purification of solutions, e.g. obtained by leaching by physical processes, e.g. by filtration, by magnetic means, or by thermal decomposition
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The application discloses a method and a system for rapid gravity settling of slurry, wherein the method comprises the following steps: adding and fully mixing raw materials; introducing carbon dioxide and carrying out chemical reaction with the slurry; forming an upper overflow liquid and a lower underflow liquid after thickening; respectively separating the upper overflow liquid and the lower underflow liquid, and circulating the solid particles for reaction to the initial stage; the above recovered clear liquid is prepared to obtain a product and recovered water, which is recycled to the initial stage. A system for rapid gravity settling of a slurry comprising: the device comprises a raw material prewashing device, a reaction device, a thickening device, a first separation device, a second separation device and a water circulating device. According to the method, the reaction slurry is subjected to thickening treatment, the upper overflow liquid and the lower underflow liquid after thickening treatment are subjected to targeted separation treatment, and target components are quickly separated and extracted, so that the solid-liquid separation efficiency is improved, and the high production efficiency is realized.
Description
Technical Field
The application belongs to the fields of hydrometallurgy, Carbon dioxide adsorption, Utilization and Sequestration (Carbon Capture, Utilization and Sequestration) and solid waste resource Utilization, and particularly relates to a method and a system for rapid gravity settling of slurry.
Background
The prior art is mostly suitable for a hydrometallurgy method based on weak acid of carbon dioxide, so as to realize green and environment-friendly effective extraction of valuable components in conventional and unconventional resources such as ores, industrial solid wastes, tailings, waste lithium ion batteries, waste circuit boards and the like; among the unconventional resources, the material components are often complex, the particle size distribution is wide and the particle size distribution is frequently changed, and in the extraction of target components, a multistage separation device is inevitably needed for solid-liquid separation to extract high-added-value products with high purity; meanwhile, compared with the traditional method, the hydrometallurgical method based on the weak acid system generally has less solid amount processed by unit volume of solvent than that of the strong acid system, and correspondingly increases the load of a solid-liquid separation processing device. However, too many separation units will add significantly to capital investment and operating costs, will increase the time required for solid-liquid separation and may affect the continuity of the separation, and ultimately the actual processing capacity of the weak acid hydrometallurgical based system.
Disclosure of Invention
In view of the above-mentioned shortcomings or drawbacks of the prior art, the present application provides a method and system for rapid gravity settling of slurry.
In order to solve the technical problem, the application is realized by the following technical scheme:
the application provides a method for rapid gravity settling of slurry, which comprises the following steps:
adding industrial waste or tailings or ore, reagent and water according to a certain proportion and fully mixing;
introducing carbon dioxide and carrying out chemical reaction with the fully mixed slurry;
the slurry after the reaction is subjected to thickening treatment to form an upper overflow liquid and a lower underflow liquid;
separating the upper overflow liquid to obtain a first clear liquid and unreacted first solid particles, recycling the unreacted first solid particles to the initial stage, and collecting the first clear liquid;
separating the bottom flow liquid to obtain a second clear liquid and unreacted second solid particles, recycling the unreacted second solid particles to the initial stage, and collecting the second clear liquid;
the first clear liquid and the second clear liquid prepare a product and recovered water, and the recovered water is circulated to an initial stage.
Further, the above method for rapid gravity settling of slurry, wherein the thickening comprises: and controlling the retention time, the stirring speed and the solid content of the overflow liquid at the upper layer/underflow liquid at the lower layer.
Further, the method for the rapid gravity settling of the slurry comprises the step of carrying out thickening treatment on the reacted slurry to form an upper overflow liquid and a lower underflow liquid, wherein the retention time is less than or equal to 1 h.
Further, the above method for rapid gravity settling of slurry, wherein the industrial waste or tailings or ore does not exceed 10% of the mass of the water and the reagent does not exceed 1% of the mass of the water.
Further, in the method for rapid gravity settling of the slurry, the carbon dioxide is continuously introduced at a pressure of not more than 100bar and reacts with the fully mixed slurry, wherein the reaction temperature is not more than 90 ℃.
Further, the above method for rapid gravity settling of slurry, wherein the industrial waste comprises: steel slag, iron slag, fly ash, bottom ash, red mud, construction waste/waste cement, tailings, waste lithium ion batteries, waste circuit boards and the like.
Further, the above method for rapid gravity settling of slurry, wherein the ore or tailings comprise a calcium magnesium type ore.
Further, the above method for rapid gravity settling of slurry, wherein the reagent comprises at least one acid or salt or combination of organic acid groups, wherein the acid of the organic acid group comprises: oxalic acid, citric acid, picolinic acid, gluconic acid, glutamic acid, formic acid, acetic acid, propionic acid, butyric acid, valeric acid, lactic acid, succinic acid, phosphoric acid, pyrophosphoric acid, ascorbic acid, or phthalic acid.
Further, in the method for rapid gravity settling of slurry, the carbon dioxide is from flue gas of a power plant, flue gas of a blast furnace of a steel plant, a converter, a refining furnace, flue gas of a lime kiln, tail gas of coal chemical industry or tail gas of petrochemical industry, and Direct Air Capture (DAC), wherein the content of the carbon dioxide is between 15% and 98%.
Further, the above method for rapid gravity settling of slurry is exemplified by industrial waste or tailings or ores containing calcium and magnesium elements, and the product includes calcium and magnesium products, wherein the calcium and magnesium products include calcium carbonate, calcium carbonate and magnesium carbonate, calcium hydroxide and magnesium hydroxide, calcium sulfate or calcium magnesium nitrate.
Further, the above method for rapid gravitational settling of slurry takes a lithium-element-containing waste lithium ion battery as an example, and the product includes a lithium product, where the lithium product includes lithium carbonate, lithium hydroxide, or a composite carbonate or hydroxide of lithium ions and other metals.
The application also provides a system for quick gravity settling of slurry, including:
the raw material prewashing device is used for adding industrial waste or tailings or ores, reagents and water into the raw material prewashing device according to a certain proportion and fully mixing the reagents and the water;
the reaction device is used for introducing carbon dioxide into the reaction device and carrying out chemical reaction with the slurry after being fully mixed with the carbon dioxide and the slurry;
the reacted slurry is subjected to thickening treatment by the thickening device to form an upper overflow liquid and a lower underflow liquid;
the upper layer overflow liquid is separated by the first separation device to obtain a first clear liquid and unreacted first solid particles, the unreacted first solid particles are circulated to the raw material prewashing device, and the first clear liquid is collected;
the lower bottom flow liquid is separated by the second separation device to obtain a second clear liquid and unreacted second solid particles, the unreacted second solid particles are recycled to the raw material prewashing device, and the second clear liquid is collected;
and the water circulating device is used for preparing a product and recovered water from the first clear liquid and the second clear liquid, and circulating the recovered water to the raw material prewashing device through the water circulating device.
Further, in the above system for rapid gravity settling of slurry, the thickener includes a thickener, and the thickener can separate the reacted slurry with a solid content of xwt% from an upper overflow liquid with an upper solid content of ywt% and a lower underflow liquid with a lower solid content of z wt% by gravity settling.
Further, in the above system for rapid gravity settling of slurry, the thickener further has an overflow port and a bottom flow port, and under the action of the rake installed in the thickener and operating, the bottom flow liquid in the lower layer is discharged through the bottom flow port, and the overflow liquid in the upper layer is discharged through the overflow port.
Further, the system for rapid gravity settling of slurry described above, wherein the first separation device comprises: and (4) a plate-and-frame filter press.
Further, the system for rapid gravity settling of slurry described above, wherein the second separation device comprises: a decanter centrifuge, or a plate and frame filter press, or a combination of a decanter centrifuge and a plate and frame filter press.
Compared with the prior art, the method has the following technical effects:
the reaction slurry is subjected to thickening treatment, the divided upper overflow liquid and lower underflow liquid have larger characteristic difference, then the upper overflow liquid and the lower underflow liquid are subjected to targeted separation treatment, and target components are quickly separated and extracted, so that the solid-liquid separation efficiency is improved, and higher production efficiency is realized; compared with the prior art, the method and the device can reduce the number of the multistage separation devices, and reduce the investment and operation cost of separation; the control of fixed asset investment, the reduction of production cost and the improvement of separation efficiency based on a solid-liquid separation facility enable the large industrialization of the weak acid hydrometallurgy system based on the application to be more feasible.
The method can realize recycling of waste solid waste resources and carbon dioxide, can realize green regeneration, can control material consumption and energy consumption which are additionally input, hardly generates secondary pollution, does not generate additional carbon footprint, can realize carbon emission reduction and utilization, and is green and environment-friendly.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:
FIG. 1: the flow chart of the method for rapid gravity settling of the slurry is shown;
FIG. 2: the application relates to a structural block diagram of a system for rapid gravity settling of slurry.
Detailed Description
The conception, specific structure and technical effects of the present application will be further described in conjunction with the accompanying drawings to fully understand the purpose, characteristics and effects of the present application.
In one embodiment of the present application, as shown in fig. 1, a method of rapid gravity settling of a slurry, the method comprises:
adding industrial waste or tailings or ore, reagent and water according to a certain proportion and fully mixing;
introducing carbon dioxide and carrying out chemical reaction with the fully mixed slurry;
the slurry after the reaction is subjected to thickening treatment to form an upper overflow liquid and a lower underflow liquid;
separating the upper overflow liquid to obtain a first clear liquid and unreacted first solid particles A1, recycling the unreacted first solid particles A1 to the initial stage, and collecting the first clear liquid;
separating the bottom flow liquid to obtain a second clear liquid and unreacted second solid particles A2, recycling the unreacted second solid particles A2 to the initial stage, and collecting the second clear liquid;
the first and second clear liquids were prepared to obtain product B1 and recovered water B2, and the recovered water B2 was recycled to the initial stage.
In this embodiment, the reaction slurry is subjected to thickening treatment, the divided upper overflow liquid and lower underflow liquid have a larger characteristic difference, and then the upper overflow liquid and lower underflow liquid are subjected to targeted separation treatment, and the target components are rapidly separated and extracted, so that the solid-liquid separation efficiency is improved, and the higher production efficiency is realized.
Wherein the thickening treatment comprises: and controlling the retention time, the stirring speed and the solid content of the overflow liquid at the upper layer/underflow liquid at the lower layer.
Further, the slurry after the reaction is subjected to thickening treatment and gravity settling, the retention time is less than or equal to 1h (the retention time is different from several minutes to one hour according to different properties of material components, density, particle size and the like), and the slurry after the reaction with the solid content of x wt% can be separated into an upper overflow liquid with the upper solid content of y wt% and a lower underflow liquid with the lower solid content of z wt% through gravity settling. And simultaneously, thickened lower underflow liquid is discharged from a underflow opening at the bottom of the thickener, which is described below, by virtue of a rake which is arranged in the thickener and runs at a slow speed, and upper overflow generated by the thickener is discharged from an overflow opening at the top.
The thickened bottom underflow liquid can be subjected to solid-liquid separation by multiple filtration separation techniques, such as centrifugal separation and/or filter-press separation, due to the high solid content, and specifically, the solid-liquid separation can be performed by using a decanter centrifuge 51, a plate-and-frame filter press 52, or a combination of the decanter centrifuge 51 and the plate-and-frame filter press 52, which is described below.
Wherein, in the embodiment, the overflow port is preferably an annular chute.
Wherein the industrial waste or tailings or ore is no more than 10% by mass of the water and the reagent is no more than 1% by mass of the water. In the practical application process, the proportion can be flexibly adjusted according to the practical situation according to the change of the industrial waste or the tailings or the ore components.
Further, the carbon dioxide is continuously introduced at a pressure of not more than 100bar and reacts with the fully mixed slurry, wherein the reaction temperature is not more than 90 ℃. In the embodiment, the use of strong acid or highly corrosive acid (without nitric acid, hydrochloric acid, sulfuric acid and hydrofluoric acid) is avoided by adjusting the pressure of carbon dioxide, the proportion of auxiliary reagents and the reaction temperature, so that the continuous leaching of the target component is realized.
The ore or tailings comprise a calcium magnesium type ore.
The reagent comprises at least one acid or salt or composition of organic acid groups, wherein the acid of the organic acid groups comprises but is not limited to: oxalic acid, citric acid, picolinic acid, gluconic acid, glutamic acid, formic acid, acetic acid, propionic acid, butyric acid, valeric acid, lactic acid, succinic acid, phosphoric acid, pyrophosphoric acid, ascorbic acid, or phthalic acid.
The water may be fresh water, or the recovered water B2 produced by the reaction and separation apparatus may be recycled.
In this embodiment, the carbon dioxide is from flue gas of a power plant, flue gas of a blast furnace of a steel plant, a converter, a refining furnace, a lime kiln, tail gas of coal chemical industry or petrochemical industry, and Direct Air Capture (DAC), wherein the content of the carbon dioxide is between 15% and 98%, and the content of the carbon dioxide varies from source to source.
The industrial waste comprises: steel slag, iron slag, fly ash, bottom ash, red mud, construction waste/waste cement, tailings, waste lithium ion batteries, waste circuit boards and the like.
The waste lithium ion battery comprises the following components and materials:
in this embodiment, taking the industrial waste or tailings or ore containing calcium and magnesium elements as an example, the product B1 includes calcium and magnesium products, and further, the calcium and magnesium products include calcium magnesium carbonate, calcium carbonate and magnesium carbonate, calcium hydroxide and magnesium hydroxide, calcium magnesium sulfate or calcium magnesium nitrate.
If a lithium element-containing waste lithium ion battery is taken as an example, the product B1 includes a lithium product including lithium carbonate, lithium hydroxide or a composite carbonate or hydroxide of lithium ions and other metals.
In this embodiment, the first and second clear liquids further include impurity ions such as iron, silicon, and aluminum in addition to calcium ions and magnesium ions, or lithium ions, and the impurity ions can be removed by: in physically and/or chemically changing the pH of the clear solution to remove the impurity ions in the form of precipitates, the pH of the clear solution is changed by continuously adding an alkaline or acidic agent, continuously adding a coagulant and/or a flocculant in an amount of not more than 1% by mass of the solution, continuously introducing compressed air/steam, and heating to remove the impurity ions in the form of precipitates.
When the first clear liquid or the second clear liquid contains higher iron element, the ferric hydroxide precipitate is collected through enrichment, so that the higher iron element is reasonably and effectively recovered and utilized.
In one embodiment of the present application, as shown in fig. 2, a system for rapid gravity settling of a slurry comprises:
the raw material prewashing device 10 is used for adding industrial waste or tailings or ores, reagents and water into the raw material prewashing device 10 according to a certain proportion and fully mixing;
a reaction device 20, which is used for introducing carbon dioxide into the reaction device 20 and carrying out chemical reaction with the slurry after being fully mixed and the reaction device 20;
the thickening device 30 is used for thickening the reacted slurry by the thickening device 30 to form an upper overflow liquid and a lower underflow liquid;
a first separation device 40, wherein the upper layer overflow liquid is separated by the first separation device 40 to obtain a first clear liquid and unreacted first solid particles A1, the unreacted first solid particles A1 are recycled to the raw material prewashing device 10, and the first clear liquid is collected;
a second separation device, wherein the bottom layer bottom flow liquid is separated by the second separation device to obtain a second clear liquid and unreacted second solid particles A2, the unreacted second solid particles A2 are recycled to the raw material prewashing device 10, and the second clear liquid B is collected;
a water circulation device, wherein the first clear liquid and the second clear liquid are prepared to obtain a product B1 and recovered water B2, and the recovered water B2 is circulated to the raw material prewashing device 10 through the water circulation device.
In this example, the first clear liquid and the second clear liquid together form a preparation liquid B for preparing a product B1.
In this embodiment, after the thickening treatment by the thickening device 30, the upper overflow liquid and the lower underflow liquid with large characteristic differences can be separated, and then the upper overflow liquid and the lower underflow liquid are subjected to targeted separation treatment, and the target components are rapidly separated and extracted, so that the solid-liquid separation efficiency is improved, and the high production efficiency is realized; the problem that a large amount of size of slurry needs to be treated when multistage solid-liquid separation is directly carried out is avoided, the number of multistage solid-liquid separation devices is reduced, cost investment is reduced, and finally production efficiency and economic benefit of added-value products are improved.
Further, the thickener 30 includes a thickener, and the thickener can separate the reacted slurry with the solid content of xwt% from the upper overflow liquid with the solid content of ywt% in the upper layer and the lower underflow liquid with the solid content of z wt% in the lower layer by gravity settling. Wherein the sinking solid content z wt% is greater than the upper layer solid content y wt% due to the effect of gravity settling.
In the above-mentioned thickening treatment process, the retention time varies from several minutes to one hour, i.e. the retention time is less than or equal to 1 hour, according to the different properties of the material components, density, particle size, etc.
The thickener is also provided with an overflow port and a bottom flow port, and the lower-layer bottom flow liquid is discharged through the bottom flow port and the upper-layer overflow liquid is discharged through the overflow port under the action of the rake which is arranged in the thickener and runs.
In this embodiment, the first separating device 40 includes: and (4) a plate-and-frame filter press. And (3) the upper layer overflow liquid discharged by the annular chute is connected into the plate-and-frame filter press for filtration, and because the upper layer overflow liquid contains a small amount of solids, a small amount of unreacted first solid particles A1 with small particle size can be filtered out by the plate-and-frame filter press, and the unreacted first solid particles A1 are put into the raw material prewashing device 10 for recycling, and a first clear liquid filtered by the plate-and-frame filter press is collected, wherein the first clear liquid contains calcium ions and magnesium ions.
In this embodiment, the second separating device includes: a decanter centrifuge 51, or a plate and frame filter press 52, or a combination of a decanter centrifuge 51 and a plate and frame filter press 52. The lower layer overflow liquid discharged from the bottom flow port is connected to the second separation device for filtration, and the lower layer overflow liquid contains a large amount of solids, so that the combination of the centrifuge or the filter press can be adopted, and the specific selection can be properly adjusted according to the actual situation. The unreacted second solid particles a2 (solid particles) filtered by the second separation device are put into the raw material prewashing device 10 for recycling, and the second clear liquid filtered by the second separation device is collected.
The present embodiment may further be configured with an impurity removing device, configured to remove impurity ions in the first clear liquid and the second clear liquid. The first clear liquid and the second clear liquid contain target ions (calcium ions and magnesium ions, or lithium ions) and also comprise impurity ions such as iron, silicon, aluminum and the like, and the impurity ions can be removed in the following way: in physically and/or chemically changing the pH of the clear solution to remove the impurity ions in the form of precipitates, the pH of the clear solution is changed by continuously adding an alkaline or acidic agent, continuously adding a coagulant and/or a flocculant in an amount of not more than 1% by mass of the solution, continuously introducing compressed air/steam, and heating to remove the impurity ions in the form of precipitates.
When the first clear liquid or the second clear liquid contains higher iron element, the ferric hydroxide precipitate is collected through enrichment, so that the higher iron element is reasonably and effectively recovered and utilized.
In this embodiment, by continuously feeding the slurry and the carbon dioxide into the reaction apparatus 20, a continuous and non-intermittent reaction can be realized, the maximum throughput can be realized, and a possibility is provided for a multi-stage circulation reaction; and simultaneously, the emission and loss of carbon dioxide in the discharging process under the batch reaction are reduced.
Further, the industrial waste or tailings or ore does not exceed 10% by mass of the water and the reagent does not exceed 1% by mass of the water. In the practical application process, the components of the industrial waste or the ore or the tailings are changed, and the proportion can be flexibly adjusted according to the practical situation.
Wherein the industrial waste comprises: steel slag, iron slag, fly ash, bottom ash, red mud, construction waste/waste cement, tailings, waste lithium ion batteries, waste circuit boards and the like.
The ore or tailings comprise a calcium magnesium type ore.
The reagent comprises at least one acid or salt or composition of organic acid groups, wherein the acid of the organic acid groups comprises but is not limited to: oxalic acid, citric acid, picolinic acid, gluconic acid, glutamic acid, formic acid, acetic acid, propionic acid, butyric acid, valeric acid, lactic acid, succinic acid, phosphoric acid, pyrophosphoric acid, ascorbic acid, or phthalic acid.
The water may be fresh water, or the recovered water B2 produced in the reaction and separation system may be recycled.
Wherein, in the process of continuously pumping the carbon dioxide into the reaction device 20 under a certain pressure and mixing and reacting with the slurry, the carbon dioxide is continuously pumped into the reaction device 20 under a pressure of not more than 100bar and is mixed and reacted with the slurry, wherein the reaction temperature is not more than 90 ℃; in the embodiment, the use of strong acid or highly corrosive acid (without nitric acid, hydrochloric acid, sulfuric acid and hydrofluoric acid) is avoided by adjusting the pressure of carbon dioxide, the proportion of auxiliary reagents and the reaction temperature, so that the continuous leaching of the target component is realized.
In this embodiment, the carbon dioxide is from flue gas of power plant, blast furnace of iron and steel plant, converter, refining furnace, lime kiln, coal chemical industry tail gas or petrochemical industry tail gas and Direct Air Capture (DAC), wherein the content of carbon dioxide is between 15% and 98%, and the content of carbon dioxide varies with different sources.
The reaction slurry is subjected to thickening treatment, the divided upper overflow liquid and lower underflow liquid have larger characteristic difference, then the upper overflow liquid and the lower underflow liquid are subjected to targeted separation treatment, and target components are quickly separated and extracted, so that the solid-liquid separation efficiency is improved, and higher production efficiency is realized; compared with the prior art, the method and the device can reduce the number of the multistage separation devices, and reduce the investment and operation cost of separation; the control of fixed asset investment, the reduction of production cost and the improvement of separation efficiency based on a solid-liquid separation facility enable the large industrialization of the weak acid hydrometallurgy system based on the application to be more feasible. The method can realize recycling of waste solid waste resources and carbon dioxide, can realize green regeneration, can control material consumption and energy consumption which are additionally input, hardly generates secondary pollution, does not generate additional carbon footprint, can realize carbon emission reduction and utilization, and is green and environment-friendly.
The above embodiments are merely to illustrate the technical solutions of the present application and are not limitative, and the present application is described in detail with reference to preferred embodiments. It will be understood by those skilled in the art that various modifications and equivalent arrangements may be made in the present invention without departing from the spirit and scope of the present invention and shall be covered by the appended claims.
Claims (15)
1. A method of rapid gravity settling of a slurry, the method comprising:
adding industrial waste or tailings or ore, reagent and water according to a certain proportion and fully mixing;
introducing carbon dioxide and carrying out chemical reaction with the fully mixed slurry;
the slurry after the reaction is subjected to thickening treatment to form an upper overflow liquid and a lower underflow liquid;
separating the upper overflow liquid to obtain a first clear liquid and unreacted first solid particles, recycling the unreacted first solid particles to the initial stage, and collecting the first clear liquid;
separating the bottom flow liquid to obtain a second clear liquid and unreacted second solid particles, recycling the unreacted second solid particles to the initial stage, and collecting the second clear liquid;
the first clear liquid and the second clear liquid prepare a product and recovered water, and the recovered water is circulated to an initial stage.
2. The method of claim 1, wherein the densifying comprises: and controlling the retention time, the stirring speed and the solid content of the overflow liquid at the upper layer/underflow liquid at the lower layer.
3. The method of claim 2, wherein the reacted slurry is thickened to form an upper overflow and a lower underflow, and the retention time is less than or equal to 1 hour.
4. The method of claim 1, wherein the industrial waste or tailings or ore comprises no more than 10% of the mass of the water and the reagent comprises no more than 1% of the mass of the water.
5. The process of claim 1 wherein said carbon dioxide is continuously introduced at a pressure not exceeding 100bar and reacted with said thoroughly mixed slurry wherein the reaction temperature is not exceeding 90 ℃.
6. The method according to any one of claims 1 to 5, wherein the industrial waste comprises: steel slag, iron slag, fly ash, bottom ash, red mud, construction waste/waste cement, tailings, waste lithium ion batteries and waste circuit boards.
7. A process according to any one of claims 1 to 5, wherein the ore or tailings comprise a calcium magnesium based ore.
8. A method according to any one of claims 1 to 5, wherein the reagent comprises at least one acid or salt or combination of organic acid groups, wherein the acid of the organic acid group comprises: oxalic acid, citric acid, picolinic acid, gluconic acid, glutamic acid, formic acid, acetic acid, propionic acid, butyric acid, valeric acid, lactic acid, succinic acid, phosphoric acid, pyrophosphoric acid, ascorbic acid, or phthalic acid.
9. The method according to any one of claims 1 to 5, wherein the carbon dioxide is derived from flue gas from a power plant, blast furnace from a steel plant, converter, refinery, lime kiln, coal chemical or petrochemical off-gas and direct air capture, wherein the carbon dioxide content is between 15% and 98%.
10. The method according to any one of claims 1 to 5, wherein the product comprises calcium magnesium carbonate, calcium carbonate and magnesium carbonate, calcium hydroxide and magnesium hydroxide, calcium magnesium sulfate or calcium magnesium nitrate, or the product comprises lithium carbonate, lithium hydroxide or a complex carbonate or hydroxide of lithium ions with other metals.
11. A system for rapid gravity settling of a slurry comprising:
the raw material prewashing device is used for adding industrial waste or tailings or ores, reagents and water into the raw material prewashing device according to a certain proportion and fully mixing the reagents and the water;
the reaction device is used for introducing carbon dioxide into the reaction device and carrying out chemical reaction with the slurry after being fully mixed with the carbon dioxide and the slurry;
the reacted slurry is subjected to thickening treatment by the thickening device to form an upper overflow liquid and a lower underflow liquid;
the upper layer overflow liquid is separated by the first separation device to obtain a first clear liquid and unreacted first solid particles, the unreacted first solid particles are circulated to the raw material prewashing device, and the first clear liquid is collected;
the lower bottom flow liquid is separated by the second separation device to obtain a second clear liquid and unreacted second solid particles, the unreacted second solid particles are recycled to the raw material prewashing device, and the second clear liquid is collected;
and the water circulating device is used for preparing a product and recovered water from the first clear liquid and the second clear liquid, and circulating the recovered water to the raw material prewashing device through the water circulating device.
12. The system of claim 11, wherein the thickening apparatus comprises a thickener that can separate the reacted slurry having a solids content of xwt% by gravity settling out an upper overflow having an upper solids content of ywt% and a lower underflow having a lower solids content of z wt%.
13. The system of claim 12, wherein the thickener further comprises an overflow port through which the underflow is discharged and an underflow port through which the overflow is discharged under the action of a rake operatively mounted within the thickener.
14. The system of claim 11, 12 or 13, wherein the first separating means comprises: and (4) a plate-and-frame filter press.
15. The system according to claim 11, 12 or 13, wherein the second separating means comprises: a decanter centrifuge, or a plate and frame filter press, or a combination of a decanter centrifuge and a plate and frame filter press.
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