CN117004835A - Method for extracting scandium from scandium-containing aqueous solution by using extractant-containing magnetic fluid - Google Patents
Method for extracting scandium from scandium-containing aqueous solution by using extractant-containing magnetic fluid Download PDFInfo
- Publication number
- CN117004835A CN117004835A CN202310839067.3A CN202310839067A CN117004835A CN 117004835 A CN117004835 A CN 117004835A CN 202310839067 A CN202310839067 A CN 202310839067A CN 117004835 A CN117004835 A CN 117004835A
- Authority
- CN
- China
- Prior art keywords
- scandium
- extractant
- magnetic fluid
- magnetic
- aqueous solution
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 229910052706 scandium Inorganic materials 0.000 title claims abstract description 148
- SIXSYDAISGFNSX-UHFFFAOYSA-N scandium atom Chemical compound [Sc] SIXSYDAISGFNSX-UHFFFAOYSA-N 0.000 title claims abstract description 119
- 239000011553 magnetic fluid Substances 0.000 title claims abstract description 81
- 239000007864 aqueous solution Substances 0.000 title claims abstract description 60
- 238000000034 method Methods 0.000 title claims abstract description 32
- 150000003325 scandium Chemical class 0.000 claims abstract description 22
- 239000000243 solution Substances 0.000 claims abstract description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 19
- 238000007885 magnetic separation Methods 0.000 claims abstract description 17
- -1 scandium ions Chemical class 0.000 claims abstract description 14
- 239000011259 mixed solution Substances 0.000 claims abstract description 10
- 238000003756 stirring Methods 0.000 claims abstract description 9
- 239000012074 organic phase Substances 0.000 claims abstract description 5
- 239000004094 surface-active agent Substances 0.000 claims abstract description 5
- 239000002122 magnetic nanoparticle Substances 0.000 claims abstract description 3
- 239000012071 phase Substances 0.000 claims abstract description 3
- 238000004064 recycling Methods 0.000 claims abstract description 3
- 239000002245 particle Substances 0.000 claims description 17
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 12
- 239000006148 magnetic separator Substances 0.000 claims description 10
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims description 9
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 8
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 claims description 6
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 claims description 6
- IMNFDUFMRHMDMM-UHFFFAOYSA-N N-Heptane Chemical compound CCCCCCC IMNFDUFMRHMDMM-UHFFFAOYSA-N 0.000 claims description 6
- POULHZVOKOAJMA-UHFFFAOYSA-N dodecanoic acid Chemical compound CCCCCCCCCCCC(O)=O POULHZVOKOAJMA-UHFFFAOYSA-N 0.000 claims description 6
- VZGDMQKNWNREIO-UHFFFAOYSA-N tetrachloromethane Chemical compound ClC(Cl)(Cl)Cl VZGDMQKNWNREIO-UHFFFAOYSA-N 0.000 claims description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 5
- 239000002253 acid Substances 0.000 claims description 5
- 238000002386 leaching Methods 0.000 claims description 5
- KVNYFPKFSJIPBJ-UHFFFAOYSA-N 1,2-diethylbenzene Chemical compound CCC1=CC=CC=C1CC KVNYFPKFSJIPBJ-UHFFFAOYSA-N 0.000 claims description 4
- KBPLFHHGFOOTCA-UHFFFAOYSA-N 1-Octanol Chemical group CCCCCCCCO KBPLFHHGFOOTCA-UHFFFAOYSA-N 0.000 claims description 4
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 claims description 4
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical group [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims description 4
- 229910017052 cobalt Inorganic materials 0.000 claims description 4
- 239000010941 cobalt Substances 0.000 claims description 4
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 4
- SEGLCEQVOFDUPX-UHFFFAOYSA-N di-(2-ethylhexyl)phosphoric acid Chemical compound CCCCC(CC)COP(O)(=O)OCC(CC)CCCC SEGLCEQVOFDUPX-UHFFFAOYSA-N 0.000 claims description 4
- 229910001448 ferrous ion Inorganic materials 0.000 claims description 4
- 239000006249 magnetic particle Substances 0.000 claims description 4
- 229910052759 nickel Inorganic materials 0.000 claims description 4
- TVMXDCGIABBOFY-UHFFFAOYSA-N octane Chemical compound CCCCCCCC TVMXDCGIABBOFY-UHFFFAOYSA-N 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 4
- STCOOQWBFONSKY-UHFFFAOYSA-N tributyl phosphate Chemical compound CCCCOP(=O)(OCCCC)OCCCC STCOOQWBFONSKY-UHFFFAOYSA-N 0.000 claims description 4
- 229910000859 α-Fe Inorganic materials 0.000 claims description 4
- IIZPXYDJLKNOIY-JXPKJXOSSA-N 1-palmitoyl-2-arachidonoyl-sn-glycero-3-phosphocholine Chemical compound CCCCCCCCCCCCCCCC(=O)OC[C@H](COP([O-])(=O)OCC[N+](C)(C)C)OC(=O)CCC\C=C/C\C=C/C\C=C/C\C=C/CCCCC IIZPXYDJLKNOIY-JXPKJXOSSA-N 0.000 claims description 3
- 239000005639 Lauric acid Substances 0.000 claims description 3
- DTOSIQBPPRVQHS-PDBXOOCHSA-N alpha-linolenic acid Chemical compound CC\C=C/C\C=C/C\C=C/CCCCCCCC(O)=O DTOSIQBPPRVQHS-PDBXOOCHSA-N 0.000 claims description 3
- 235000020661 alpha-linolenic acid Nutrition 0.000 claims description 3
- 235000019270 ammonium chloride Nutrition 0.000 claims description 3
- GVGUFUZHNYFZLC-UHFFFAOYSA-N dodecyl benzenesulfonate;sodium Chemical compound [Na].CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 GVGUFUZHNYFZLC-UHFFFAOYSA-N 0.000 claims description 3
- 239000003350 kerosene Substances 0.000 claims description 3
- 239000000787 lecithin Substances 0.000 claims description 3
- 229940067606 lecithin Drugs 0.000 claims description 3
- 235000010445 lecithin Nutrition 0.000 claims description 3
- 229960004488 linolenic acid Drugs 0.000 claims description 3
- KQQKGWQCNNTQJW-UHFFFAOYSA-N linolenic acid Natural products CC=CCCC=CCC=CCCCCCCCC(O)=O KQQKGWQCNNTQJW-UHFFFAOYSA-N 0.000 claims description 3
- 239000003960 organic solvent Substances 0.000 claims description 3
- 239000002893 slag Substances 0.000 claims description 3
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 claims description 3
- GGHPAKFFUZUEKL-UHFFFAOYSA-M sodium;hexadecyl sulfate Chemical compound [Na+].CCCCCCCCCCCCCCCCOS([O-])(=O)=O GGHPAKFFUZUEKL-UHFFFAOYSA-M 0.000 claims description 3
- 239000002904 solvent Substances 0.000 claims description 3
- OYHQOLUKZRVURQ-NTGFUMLPSA-N (9Z,12Z)-9,10,12,13-tetratritiooctadeca-9,12-dienoic acid Chemical compound C(CCCCCCC\C(=C(/C\C(=C(/CCCCC)\[3H])\[3H])\[3H])\[3H])(=O)O OYHQOLUKZRVURQ-NTGFUMLPSA-N 0.000 claims description 2
- WRIDQFICGBMAFQ-UHFFFAOYSA-N (E)-8-Octadecenoic acid Natural products CCCCCCCCCC=CCCCCCCC(O)=O WRIDQFICGBMAFQ-UHFFFAOYSA-N 0.000 claims description 2
- WBIQQQGBSDOWNP-UHFFFAOYSA-N 2-dodecylbenzenesulfonic acid Chemical compound CCCCCCCCCCCCC1=CC=CC=C1S(O)(=O)=O WBIQQQGBSDOWNP-UHFFFAOYSA-N 0.000 claims description 2
- LQJBNNIYVWPHFW-UHFFFAOYSA-N 20:1omega9c fatty acid Natural products CCCCCCCCCCC=CCCCCCCCC(O)=O LQJBNNIYVWPHFW-UHFFFAOYSA-N 0.000 claims description 2
- HNNQYHFROJDYHQ-UHFFFAOYSA-N 3-(4-ethylcyclohexyl)propanoic acid 3-(3-ethylcyclopentyl)propanoic acid Chemical compound CCC1CCC(CCC(O)=O)C1.CCC1CCC(CCC(O)=O)CC1 HNNQYHFROJDYHQ-UHFFFAOYSA-N 0.000 claims description 2
- QSBYPNXLFMSGKH-UHFFFAOYSA-N 9-Heptadecensaeure Natural products CCCCCCCC=CCCCCCCCC(O)=O QSBYPNXLFMSGKH-UHFFFAOYSA-N 0.000 claims description 2
- CPELXLSAUQHCOX-UHFFFAOYSA-M Bromide Chemical compound [Br-] CPELXLSAUQHCOX-UHFFFAOYSA-M 0.000 claims description 2
- WBLGXIFKKXGJGJ-UHFFFAOYSA-N CC(CCCCCC)(C)OP(O)(=O)C Chemical compound CC(CCCCCC)(C)OP(O)(=O)C WBLGXIFKKXGJGJ-UHFFFAOYSA-N 0.000 claims description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 2
- 239000005642 Oleic acid Substances 0.000 claims description 2
- ZQPPMHVWECSIRJ-UHFFFAOYSA-N Oleic acid Natural products CCCCCCCCC=CCCCCCCCC(O)=O ZQPPMHVWECSIRJ-UHFFFAOYSA-N 0.000 claims description 2
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 claims description 2
- 235000021355 Stearic acid Nutrition 0.000 claims description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 2
- 239000012670 alkaline solution Substances 0.000 claims description 2
- 229910045601 alloy Inorganic materials 0.000 claims description 2
- 239000000956 alloy Substances 0.000 claims description 2
- 229960001040 ammonium chloride Drugs 0.000 claims description 2
- 229960002233 benzalkonium bromide Drugs 0.000 claims description 2
- KHSLHYAUZSPBIU-UHFFFAOYSA-M benzododecinium bromide Chemical compound [Br-].CCCCCCCCCCCC[N+](C)(C)CC1=CC=CC=C1 KHSLHYAUZSPBIU-UHFFFAOYSA-M 0.000 claims description 2
- QUXFOKCUIZCKGS-UHFFFAOYSA-N bis(2,4,4-trimethylpentyl)phosphinic acid Chemical compound CC(C)(C)CC(C)CP(O)(=O)CC(C)CC(C)(C)C QUXFOKCUIZCKGS-UHFFFAOYSA-N 0.000 claims description 2
- 229960001927 cetylpyridinium chloride Drugs 0.000 claims description 2
- YMKDRGPMQRFJGP-UHFFFAOYSA-M cetylpyridinium chloride Chemical compound [Cl-].CCCCCCCCCCCCCCCC[N+]1=CC=CC=C1 YMKDRGPMQRFJGP-UHFFFAOYSA-M 0.000 claims description 2
- 239000003795 chemical substances by application Substances 0.000 claims description 2
- 229910052802 copper Inorganic materials 0.000 claims description 2
- 239000010949 copper Substances 0.000 claims description 2
- 239000003085 diluting agent Substances 0.000 claims description 2
- RZHBMYQXKIDANM-UHFFFAOYSA-N dioctyl butanedioate;sodium Chemical compound [Na].CCCCCCCCOC(=O)CCC(=O)OCCCCCCCC RZHBMYQXKIDANM-UHFFFAOYSA-N 0.000 claims description 2
- 239000010881 fly ash Substances 0.000 claims description 2
- 239000008187 granular material Substances 0.000 claims description 2
- 239000010842 industrial wastewater Substances 0.000 claims description 2
- 229910052742 iron Inorganic materials 0.000 claims description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 2
- QXJSBBXBKPUZAA-UHFFFAOYSA-N isooleic acid Natural products CCCCCCCC=CCCCCCCCCC(O)=O QXJSBBXBKPUZAA-UHFFFAOYSA-N 0.000 claims description 2
- 229940057995 liquid paraffin Drugs 0.000 claims description 2
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 claims description 2
- 229910021645 metal ion Inorganic materials 0.000 claims description 2
- 238000002156 mixing Methods 0.000 claims description 2
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 2
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims description 2
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(O)=O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 claims description 2
- 235000021313 oleic acid Nutrition 0.000 claims description 2
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 claims description 2
- 150000003141 primary amines Chemical group 0.000 claims description 2
- 125000001453 quaternary ammonium group Chemical group 0.000 claims description 2
- 150000003335 secondary amines Chemical group 0.000 claims description 2
- 235000019333 sodium laurylsulphate Nutrition 0.000 claims description 2
- NWZBFJYXRGSRGD-UHFFFAOYSA-M sodium;octadecyl sulfate Chemical compound [Na+].CCCCCCCCCCCCCCCCCCOS([O-])(=O)=O NWZBFJYXRGSRGD-UHFFFAOYSA-M 0.000 claims description 2
- 239000008117 stearic acid Substances 0.000 claims description 2
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 claims description 2
- 150000003512 tertiary amines Chemical group 0.000 claims description 2
- 229910052725 zinc Inorganic materials 0.000 claims description 2
- 239000011701 zinc Substances 0.000 claims description 2
- LDMOEFOXLIZJOW-UHFFFAOYSA-N 1-dodecanesulfonic acid Chemical compound CCCCCCCCCCCCS(O)(=O)=O LDMOEFOXLIZJOW-UHFFFAOYSA-N 0.000 claims 1
- 238000000638 solvent extraction Methods 0.000 abstract description 6
- 238000004945 emulsification Methods 0.000 abstract description 4
- 238000004880 explosion Methods 0.000 abstract description 4
- 239000007788 liquid Substances 0.000 abstract description 2
- 238000000926 separation method Methods 0.000 abstract description 2
- 230000007547 defect Effects 0.000 abstract 1
- 238000000605 extraction Methods 0.000 description 23
- 238000011084 recovery Methods 0.000 description 14
- 239000012266 salt solution Substances 0.000 description 13
- 238000002360 preparation method Methods 0.000 description 6
- 238000005191 phase separation Methods 0.000 description 3
- 229910003321 CoFe Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- 229910001030 Iron–nickel alloy Inorganic materials 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000000306 component Substances 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 229940060296 dodecylbenzenesulfonic acid Drugs 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000009854 hydrometallurgy Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- HYXGAEYDKFCVMU-UHFFFAOYSA-N scandium oxide Chemical compound O=[Sc]O[Sc]=O HYXGAEYDKFCVMU-UHFFFAOYSA-N 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- 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
- C22B59/00—Obtaining rare earth metals
-
- 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
- C22B3/26—Treatment or purification of solutions, e.g. obtained by leaching by liquid-liquid extraction using organic compounds
- C22B3/262—Treatment or purification of solutions, e.g. obtained by leaching by liquid-liquid extraction using organic compounds using alcohols or phenols
-
- 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
- C22B3/26—Treatment or purification of solutions, e.g. obtained by leaching by liquid-liquid extraction using organic compounds
- C22B3/28—Amines
-
- 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
- C22B3/26—Treatment or purification of solutions, e.g. obtained by leaching by liquid-liquid extraction using organic compounds
- C22B3/28—Amines
- C22B3/288—Quaternary ammonium
-
- 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
- C22B3/26—Treatment or purification of solutions, e.g. obtained by leaching by liquid-liquid extraction using organic compounds
- C22B3/32—Carboxylic acids
- C22B3/324—Naphthenic 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
- C22B3/26—Treatment or purification of solutions, e.g. obtained by leaching by liquid-liquid extraction using organic compounds
- C22B3/34—Treatment or purification of solutions, e.g. obtained by leaching by liquid-liquid extraction using organic compounds containing sulfur, e.g. sulfonium
-
- 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
- C22B3/26—Treatment or purification of solutions, e.g. obtained by leaching by liquid-liquid extraction using organic compounds
- C22B3/38—Treatment or purification of solutions, e.g. obtained by leaching by liquid-liquid extraction using organic compounds containing phosphorus
- C22B3/384—Pentavalent phosphorus oxyacids, esters thereof
- C22B3/3842—Phosphinic acid, e.g. H2P(O)(OH)
-
- 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
- C22B3/26—Treatment or purification of solutions, e.g. obtained by leaching by liquid-liquid extraction using organic compounds
- C22B3/38—Treatment or purification of solutions, e.g. obtained by leaching by liquid-liquid extraction using organic compounds containing phosphorus
- C22B3/384—Pentavalent phosphorus oxyacids, esters thereof
- C22B3/3844—Phosphonic acid, e.g. H2P(O)(OH)2
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- 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
- C22B3/26—Treatment or purification of solutions, e.g. obtained by leaching by liquid-liquid extraction using organic compounds
- C22B3/38—Treatment or purification of solutions, e.g. obtained by leaching by liquid-liquid extraction using organic compounds containing phosphorus
- C22B3/384—Pentavalent phosphorus oxyacids, esters thereof
- C22B3/3846—Phosphoric acid, e.g. (O)P(OH)3
-
- 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
- C22B3/26—Treatment or purification of solutions, e.g. obtained by leaching by liquid-liquid extraction using organic compounds
- C22B3/40—Mixtures
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- 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
- C22B3/26—Treatment or purification of solutions, e.g. obtained by leaching by liquid-liquid extraction using organic compounds
- C22B3/40—Mixtures
- C22B3/408—Mixtures using a mixture of phosphorus-based acid derivatives of different types
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- 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
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/005—Separation by a physical processing technique only, e.g. by mechanical breaking
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- 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 invention uniformly disperses inorganic magnetic nano particles coated with the surfactant in an organic phase (oil phase) to prepare superparamagnetic magnetic fluid; then adding the extractant into the prepared superparamagnetic magnetic fluid to prepare the superparamagnetic magnetic fluid containing the extractant. Adding the prepared extractant-containing superparamagnetic magnetic fluid into scandium-containing aqueous solution, fully stirring, and then enabling scandium-containing oil-water mixed solution to flow through a magnetic separation device to separate extractant-containing magnetic fluid-scandium complex and scandium-free or scandium-low-scandium-containing aqueous solution. Then scandium ions are reversely extracted, and magnetic fluid containing extractant and scandium ion enrichment solution are obtained after magnetic separation; the magnetic fluid containing the extractant is recycled, and the scandium ion enrichment solution is further treated to obtain scandium salt products. The method can directly extract scandium from scandium-containing aqueous solution, overcomes the defects of serious emulsification, high volatility, high explosion risk and difficult solid-liquid separation of the traditional solvent extraction method, and can realize recycling of scandium resources.
Description
Technical field:
the invention relates to the fields of hydrometallurgy, rare earth element extraction, environmental management and the like, in particular to a method for extracting scandium from scandium-containing aqueous solution by using magnetic fluid containing an extractant.
Technical Field
The industries of mining, metallurgy, coal and electricity and the like produce a large amount of scandium-containing tailings, slag and scandium-containing wastewater, so that serious resource waste and environmental pollution are caused, and a technical solution for scandium resource recovery is needed.
The traditional main method for extracting scandium is to extract scandium from scandium-containing leaching solution and scandium-containing wastewater by a liquid-liquid solvent extraction method, and obtain enriched scandium solution after back extraction, so as to further obtain solid scandium oxide. Although the solvent extraction method has large extraction capacity and high mass transfer speed, is widely applied to production, the solvent extraction method is unsuitable for treating a large-volume scandium-containing aqueous solution due to the problems of serious emulsification, difficult phase separation, potential explosion safety hazard due to easy volatilization, loss of solvent and extractant, secondary pollution and the like. Particularly, the low-concentration scandium-containing aqueous solution has the problems of low treatment efficiency, high cost and the like, and is difficult to be industrially and practically applied.
The magnetic fluid containing the extractant solves the problems of serious emulsification, difficult phase separation, extractant loss and the like of the traditional solvent extraction method, well combines the magnetic separation and the mature extraction method, and effectively solves the problem of scandium extraction from a large-volume and low-concentration scandium-containing aqueous solution. In addition, the extractant in the extractant-containing magnetic fluid is not easy to fall off, and the problem that the extractant is easy to volatilize and has explosion safety hidden trouble is solved to the greatest extent.
Disclosure of Invention
Aiming at the problems of scandium extraction and separation from scandium-containing aqueous solution, the invention provides a brand-new technical proposal, namely, magnetic fluid containing extractant is added into the aqueous solution, scandium is directly extracted and separated from scandium-containing aqueous solution by adopting a magnetic separation technology, scandium resource is recycled, and the method is particularly suitable for extracting scandium in large-volume low-scandium concentration aqueous solution.
To achieve the above object, the present invention has the following main contents:
the method for extracting and separating scandium from scandium-containing aqueous solution by using extractant-containing magnetic fluid is characterized by comprising the following steps of:
(1) Inorganic magnetic nano particles with surface coated with surfactant are uniformly dispersed in an organic phase (oil phase) to prepare magnetic fluid with superparamagnetism;
(2) Adding 5 to 50 mass percent of extractant into the superparamagnetic magnetic fluid prepared in the step (1) to prepare the superparamagnetic magnetic fluid containing the extractant;
(3) Adjusting the pH value of scandium-containing aqueous solution to be between 0 and 14;
(4) Adding the extractant-containing superparamagnetic magnetic fluid prepared in the step (2) into the scandium-containing aqueous solution prepared in the step (3) according to an oil-water ratio of 1:1 to 1:50;
(5) Fully stirring and mixing for 5 to 60 minutes to fully extract scandium in scandium-containing aqueous solution by using the superparamagnetic magnetic fluid containing the extractant;
(6) The scandium-containing oil-water mixed solution obtained in the step (5) flows through a magnetic separation device to separate a magnetic fluid-scandium complex containing extractant and a scandium-free or scandium-low-containing aqueous solution;
(7) Immersing the extractant-containing magnetic fluid-scandium complex in the step (6) in a strong alkaline aqueous solution or an acid solution, back-extracting scandium ions, and magnetically separating to obtain the extractant-containing magnetic fluid and an enriched scandium ion solution; and (3) recycling the magnetic fluid containing the extractant in the step (4), and further treating the enriched scandium ion solution to obtain a scandium salt product.
Further, the method for extracting and separating scandium from the scandium-containing aqueous solution by using the extractant-containing magnetic fluid is characterized in that the extractant is one or more of tributyl phosphate (TBP), di (2-ethylhexyl) phosphate (P-204), 2-ethylhexyl phosphate mono (2-ethylhexyl) ester (P-507), dimethylheptyl methylphosphonate (P-350), cyanex272, dodecylbenzene sulfonic acid, 6, 7-dinonyl-2-naphthalene sulfonic acid, naphthenic acid, secondary octanol, primary amine, secondary amine, tertiary amine and quaternary ammonium, and the organic phase diluent is one or more of D40 organic solvent oil, 200# solvent oil, sulfonated kerosene, liquid paraffin, octane, heptane, benzene, toluene, diethylbenzene, chloroform and carbon tetrachloride.
Further, the method for extracting and separating scandium from scandium-containing aqueous solution by using the extractant-containing magnetic fluid is characterized in that the stripping agent strong alkali solution is KOH and Ca (OH) 2 、NaOH、Ba(OH) 2 、NaCO 3 One or more of the acid solutions is H 2 SO 4 、H 2 C 2 O 4 、H 2 SeO 4 、H 3 PO 4 、RSOOH、RCOSH、C 2 H 4 O 2 One or more of the following.
Further, the method for extracting and separating scandium from the scandium-containing aqueous solution by using the extractant-containing magnetic fluid is characterized in that the surface-coated surfactant is one or more of stearic acid, lauric acid, oleic acid, linoleic acid, linolenic acid, sodium dodecyl sulfate, sodium hexadecyl sulfate, sodium octadecyl sulfate, sodium dioctyl succinate sulfonate, sodium dodecyl benzene sulfonate, ammonium chloride, benzalkonium bromide, cetylpyridinium chloride (bromide) and lecithin.
Further, the method for extracting and separating scandium from the scandium-containing aqueous solution by using the extractant-containing magnetic fluid is characterized in that the inorganic magnetic particles are ferrite particles, or ferric oxide particles, or metallic iron, cobalt, nickel and alloy particles thereof; wherein the ferrite particles have a molecular formula of XFe 2 O 4 Wherein X is ferrous ion or divalent metal ion with ionic radius similar to ferrous ion, including manganese, zinc, copper, nickel and cobalt.
Further, the method for extracting and separating scandium from scandium-containing aqueous solution by using the extractant-containing magnetic fluid is characterized in that the forms of the inorganic magnetic particles comprise granules, rods and flakes; the average diameter is between 5 nm and 10 microns.
Further, the method for extracting and separating scandium from the magnetic fluid containing the extractant is characterized in that the magnetic fluid containing the extractant is one or more of scandium-containing tailing slag leaching solution, scandium-containing fly ash leaching solution, scandium-containing raffinate and scandium-containing industrial wastewater, and the scandium ion concentration is 5-500 mg/L.
Further, the method for extracting and separating scandium from the scandium-containing aqueous solution by using the extractant-containing magnetic fluid is characterized in that the magnetic separation is an operation process for separating magnetic substances from non-magnetic substances, and the magnetic separation device is a device which comprises a permanent magnet or an electromagnet core component and can realize magnetic separation operation and comprises a magnetic drum separator, a high gradient magnetic separator and a high strength magnetic rod type magnetic separator.
Compared with the prior art for extracting and separating scandium from scandium-containing aqueous solution, the invention has the following outstanding advantages:
firstly, directly extracting scandium from scandium-containing aqueous solution by using extractant-containing magnetic fluid, wherein the scandium extraction rate can reach more than 97%, the extracted extractant-containing magnetic fluid-scandium complex does not contain or contains little other metal components in the aqueous solution, the extractant-containing magnetic fluid-scandium complex is subjected to alkaline solution or acid back extraction, and then magnetic separation is carried out to obtain recyclable extractant-containing magnetic fluid and scandium salt solution products, so that the recovery of the extractant-containing magnetic fluid and the extraction of scandium in the scandium-containing aqueous solution are realized;
the second, extractant-containing magnetic fluid avoids the problems of serious emulsification, difficult phase separation, extractant loss and the like of the traditional solvent extraction method, well combines the magnetic separation and the mature extraction method, and effectively solves the problem of scandium extraction from a large-volume and low-concentration scandium-containing aqueous solution. In addition, the extractant in the extractant-containing magnetic fluid is not easy to fall off, and the problem that the extractant is easy to volatilize and has explosion safety hidden trouble is solved to the greatest extent.
Thirdly, in the whole process of extracting scandium from scandium-containing aqueous solution, the process is simple, the energy consumption is low, no new pollutant is generated, and the green clean production is realized.
The invention provides a novel technical solution for directly extracting scandium from a large-volume low-scandium concentration water solution independently.
The specific embodiment is as follows:
the invention is illustrated in further detail by the following examples:
example 1
Preparation of NiFe surface-coated linolenic acid 2 O 4 The particles are added into D40 organic solvent oil to prepare superparamagnetic magnetic fluid; adding 5% of extractant into the superparamagnetic magnetic fluid to prepare the superparamagnetic magnetic fluid containing the extractant. 100 ml of scandium-containing aqueous solution is taken to adjust the pH to 2, superparamagnetic magnetic fluid containing extractant is added according to the oil-water ratio of 1:1, and stirring is carried out for 10 minutes under the condition of 200 revolutions per minute.
And (3) enabling the scandium-containing oil-water mixed solution to flow through a high gradient magnetic separator to separate a magnetic fluid-scandium compound containing extractant, wherein the scandium extraction rate of the scandium-containing aqueous solution reaches 97%.
And immersing the extractant-containing magnetic fluid-scandium complex in 1 mol/liter sodium hydroxide aqueous solution for back extraction, and magnetically separating to obtain extractant-containing magnetic fluid and scandium salt solution, wherein the recovery rate of the extractant-containing magnetic fluid is 95%, and scandium salt solution is crystallized to obtain scandium salt product, and the scandium recovery rate is 97%.
Example 2
Preparation of CoFe with surface-coated lauric acid 2 O 4 Particles, adding the particles into sulfonated kerosene to prepare superparamagnetic magnetic fluid; adding 10% of extractant into the superparamagnetic magnetic fluid to prepare the superparamagnetic magnetic fluid containing the extractant. 100 ml of scandium-containing aqueous solution is taken to be adjusted to pH 4, superparamagnetic magnetic fluid containing extractant is added according to the oil-water ratio of 1:5, and stirring is carried out for 10 minutes under the condition of 200 revolutions per minute.
And (3) enabling the scandium-containing oil-water mixed solution to flow through an electromagnetic magnetic separator to separate out a magnetic fluid-scandium complex containing extractant, wherein the scandium extraction rate of the scandium-containing aqueous solution reaches 97%.
And immersing the extractant-containing magnetic fluid-scandium complex in 2 mol/L sodium hydroxide aqueous solution for back extraction, and magnetically separating to obtain extractant-containing magnetic fluid and scandium salt solution, wherein the recovery rate of the extractant-containing magnetic fluid is 95%, and scandium salt solution is crystallized to obtain scandium salt product, and the scandium recovery rate is 97%.
Example 3
Preparation of CoFe surface-coated with sodium hexadecyl sulfate 2 O 4 Particles, adding the particles into toluene to prepare superparamagnetic magnetic fluid; adding 20% of extractant into the superparamagnetic magnetic fluid to prepare the superparamagnetic magnetic fluid containing the extractant. 100 ml of scandium-containing aqueous solution is taken to adjust the pH to 7, superparamagnetic magnetic fluid containing extractant is added according to the oil-water ratio of 1:10, and stirring is carried out for 10 minutes under the condition of 200 revolutions per minute.
And (3) enabling the scandium-containing oil-water mixed solution to flow through a high-strength magnetic rod type magnetic separator to separate out a magnetic fluid-scandium compound body containing an extractant, wherein the scandium extraction rate of the scandium-containing aqueous solution reaches 98%.
Immersing the extractant-containing magnetic fluid-scandium complex in H with pH of 1 2 SO 4 And carrying out back extraction in the aqueous solution, and carrying out magnetic separation to obtain a magnetic fluid containing an extractant and scandium salt solution, wherein the recovery rate of the magnetic fluid containing the extractant is 96%, and scandium salt solution is crystallized to obtain a scandium salt product, and the scandium recovery rate is 98%.
Example 4
Preparation of surface-coated ammonium chloride Fe 3 O 4 Particles, which are added into carbon tetrachloride to prepare superparamagnetic magnetic fluid; adding 30% of extractant into the superparamagnetic magnetic fluid to prepare the superparamagnetic magnetic fluid containing the extractant. 100 ml of scandium-containing aqueous solution is taken to adjust the pH to 9, superparamagnetic magnetic fluid containing extractant is added according to the oil-water ratio of 1:20, and stirring is carried out for 10 minutes under the condition of 200 revolutions per minute.
And (3) enabling the scandium-containing oil-water mixed solution to flow through a magnetic drum magnetic separator to separate a magnetic fluid-scandium compound body containing an extractant, wherein the scandium extraction rate of the scandium-containing aqueous solution reaches 97%.
Immersing the extractant-containing magnetic fluid-scandium complex in H with pH 2 3 PO 4 Back extraction is carried out in the aqueous solution, and magnetic separation is carried out to obtain magnetic fluid containing extractant and scandium salt solution, and the recovery rate of the magnetic fluid containing extractant is 9And 6, crystallizing the scandium salt solution to obtain a scandium salt product, wherein the scandium recovery rate is 97%.
Example 5
Preparation of MnFe surface-coated with sodium dodecylbenzenesulfonate 2 O 4 Particles, adding the particles into octane to prepare superparamagnetic magnetic fluid; adding 40% of extractant into the superparamagnetic magnetic fluid to prepare the superparamagnetic magnetic fluid containing the extractant. 100 ml of scandium-containing aqueous solution is taken to adjust the pH to 11, superparamagnetic magnetic fluid containing extractant is added according to the oil-water ratio of 1:40, and stirring is carried out for 10 minutes under the condition of 200 revolutions per minute.
And (3) enabling the scandium-containing oil-water mixed solution to flow through a high gradient magnetic separator to separate a magnetic fluid-scandium compound containing extractant, wherein the scandium extraction rate of the scandium-containing aqueous solution reaches 97%.
And immersing the extractant-containing magnetic fluid-scandium complex in RCOSH aqueous solution with pH value of 3 for back extraction, and magnetically separating to obtain extractant-containing magnetic fluid and scandium salt solution, wherein the recovery rate of the extractant-containing magnetic fluid is 96%, and scandium salt solution is crystallized to obtain scandium salt product, and the scandium recovery rate is 97%.
Example 6
Preparation of surface-coated lecithin CuFe 2 O 4 Particles, adding the particles into the mixed solution of octane and heptane to prepare superparamagnetic magnetic fluid; adding an extractant with the mass percentage of 50% into the superparamagnetic magnetic fluid to prepare the superparamagnetic magnetic fluid containing the extractant. 100 ml of scandium-containing aqueous solution is taken to adjust the pH to 11, superparamagnetic magnetic fluid containing extractant is added according to the oil-water ratio of 1:50, and stirring is carried out for 10 minutes under the condition of 200 revolutions per minute.
And (3) enabling the scandium-containing oil-water mixed solution to flow through an electromagnetic magnetic separator to separate a magnetic fluid-scandium complex containing extractant, wherein the scandium extraction rate of the scandium-containing aqueous solution reaches 98%.
Immersing the extractant-containing magnetic fluid-scandium complex in C with pH 2 2 H 4 O 2 And carrying out back extraction in the aqueous solution, and carrying out magnetic separation to obtain a magnetic fluid containing an extractant and scandium salt solution, wherein the recovery rate of the magnetic fluid containing the extractant is 96%, and scandium salt solution is crystallized to obtain a scandium salt product, and the scandium recovery rate is 98%.
Claims (8)
1. The method for extracting and separating scandium from scandium-containing aqueous solution by using extractant-containing magnetic fluid is characterized by comprising the following steps of:
(1) Inorganic magnetic nano particles with surface coated with surfactant are uniformly dispersed in an organic phase (oil phase) to prepare magnetic fluid with superparamagnetism;
(2) Adding 5 to 50 mass percent of extractant into the superparamagnetic magnetic fluid prepared in the step (1) to prepare the superparamagnetic magnetic fluid containing the extractant;
(3) Adjusting the pH value of scandium-containing aqueous solution to be between 0 and 14;
(4) Adding the extractant-containing superparamagnetic magnetic fluid prepared in the step (2) into the scandium-containing aqueous solution prepared in the step (3) according to an oil-water ratio of 1:1 to 1:50;
(5) Fully stirring and mixing for 5 to 60 minutes to fully extract scandium in scandium-containing aqueous solution by using the superparamagnetic magnetic fluid containing the extractant;
(6) The scandium-containing oil-water mixed solution obtained in the step (5) flows through a magnetic separation device to separate a magnetic fluid-scandium complex containing extractant and a scandium-free or scandium-low-containing aqueous solution;
(7) Immersing the extractant-containing magnetic fluid-scandium complex in the step (6) in a strong alkaline aqueous solution or an acid solution, back-extracting scandium ions, and magnetically separating to obtain the extractant-containing magnetic fluid and an enriched scandium ion solution; and (3) recycling the magnetic fluid containing the extractant in the step (4), and further treating the enriched scandium ion solution to obtain a scandium salt product.
2. The method for extracting scandium from scandium-containing aqueous solution according to claim 1, wherein the extractant is one or more of tributyl phosphate (TBP), di (2-ethylhexyl) phosphate (P-204), 2-ethylhexyl phosphate mono (2-ethylhexyl) ester (P-507), dimethylheptyl methylphosphonate (P-350), cyanex272, dodecylsulphonic acid, dodecylbenzenesulphonic acid, 6, 7-dinonyl-2-naphthalenesulphonic acid, naphthenic acid, secondary octanol, primary amine, secondary amine, tertiary amine, quaternary ammonium; the organic phase diluent is one or more of D40 organic solvent oil, 200# solvent oil, sulfonated kerosene, liquid paraffin, octane, heptane, benzene, toluene, diethylbenzene, chloroform and carbon tetrachloride.
3. A process for extracting scandium from aqueous solution containing scandium by using magnetic fluid containing extractant according to claim 1, wherein the strong alkaline solution of the stripping agent is KOH, ca (OH) 2 、NaOH、Ba(OH) 2 、NaCO 3 One or more of the acid solutions is H 2 SO 4 、H 2 C 2 O 4 、H 2 SeO 4 、H 3 PO 4 、RSOOH、RCOSH、C 2 H 4 O 2 One or more of the following.
4. The method for extracting scandium from magnetic fluid containing extractant according to claim 1, wherein the surface-coated surfactant is one or more of stearic acid, lauric acid, oleic acid, linoleic acid, linolenic acid, sodium dodecyl sulfate, sodium hexadecyl sulfate, sodium octadecyl sulfate, sodium dioctyl succinate sulfonate, sodium dodecyl benzene sulfonate, ammonium chloride, benzalkonium bromide, cetylpyridinium chloride (bromide) and lecithin.
5. The method for extracting scandium from a magnetic fluid containing an extractant according to claim 1 wherein the inorganic magnetic particles are ferrite particles, or ferric oxide particles, or metallic iron, cobalt, nickel and alloys thereof; wherein the ferrite particles have a molecular formula of XFe 2 O 4 Wherein X is ferrous ion or divalent metal ion with ionic radius similar to ferrous ion, including manganese, zinc, copper, nickel and cobalt.
6. The method for extracting scandium from water solution containing scandium according to claim 1 wherein the form of the inorganic magnetic particles comprises granules, rods and flakes; the average diameter is between 5 nm and 10 microns.
7. The method for extracting and separating scandium from a scandium-containing aqueous solution by using an extractant-containing magnetic fluid according to claim 1, wherein the scandium-containing aqueous solution is one or more of scandium-containing tailing slag leaching solution, scandium-containing fly ash leaching solution, scandium-containing raffinate and scandium-containing industrial wastewater, and the scandium ion concentration is 5-500 mg/L.
8. The method for extracting scandium from scandium-containing aqueous solution according to claim 1, wherein the magnetic separation means an operation process for separating magnetic substances from non-magnetic substances, and the magnetic separation means a device capable of realizing magnetic separation operation comprising a core member of a permanent magnet or an electromagnet, and comprises a magnetic drum separator, a high gradient magnetic separator and a high strength magnetic rod magnetic separator.
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