CA2314123C - Procede de traitement de matiere provenant d'un revetement usage provenant d'une cuve electrolytique de production d'aluminium - Google Patents
Procede de traitement de matiere provenant d'un revetement usage provenant d'une cuve electrolytique de production d'aluminium Download PDFInfo
- Publication number
- CA2314123C CA2314123C CA 2314123 CA2314123A CA2314123C CA 2314123 C CA2314123 C CA 2314123C CA 2314123 CA2314123 CA 2314123 CA 2314123 A CA2314123 A CA 2314123A CA 2314123 C CA2314123 C CA 2314123C
- Authority
- CA
- Canada
- Prior art keywords
- accordance
- acid
- digester
- alumina
- compositions
- 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.)
- Expired - Fee Related
Links
- 238000000034 method Methods 0.000 title claims abstract description 129
- 239000000463 material Substances 0.000 title claims abstract description 76
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 38
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 38
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 111
- 239000007789 gas Substances 0.000 claims abstract description 84
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 80
- 239000007788 liquid Substances 0.000 claims abstract description 56
- 229910001868 water Inorganic materials 0.000 claims abstract description 56
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 55
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 53
- 239000002253 acid Substances 0.000 claims abstract description 52
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 48
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 46
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 45
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 claims abstract description 43
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 claims abstract description 40
- LELOWRISYMNNSU-UHFFFAOYSA-N hydrogen cyanide Chemical compound N#C LELOWRISYMNNSU-UHFFFAOYSA-N 0.000 claims abstract description 40
- 239000002002 slurry Substances 0.000 claims abstract description 39
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims abstract description 38
- 229910052938 sodium sulfate Inorganic materials 0.000 claims abstract description 38
- 235000011152 sodium sulphate Nutrition 0.000 claims abstract description 38
- KLZUFWVZNOTSEM-UHFFFAOYSA-K Aluminum fluoride Inorganic materials F[Al](F)F KLZUFWVZNOTSEM-UHFFFAOYSA-K 0.000 claims abstract description 36
- 150000003839 salts Chemical class 0.000 claims abstract description 36
- 150000004684 trihydrates Chemical class 0.000 claims abstract description 22
- 239000011777 magnesium Substances 0.000 claims abstract description 19
- IRPGOXJVTQTAAN-UHFFFAOYSA-N 2,2,3,3,3-pentafluoropropanal Chemical compound FC(F)(F)C(F)(F)C=O IRPGOXJVTQTAAN-UHFFFAOYSA-N 0.000 claims abstract description 17
- 229910052749 magnesium Inorganic materials 0.000 claims abstract description 17
- 239000011819 refractory material Substances 0.000 claims abstract description 16
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims abstract description 15
- 235000019341 magnesium sulphate Nutrition 0.000 claims abstract description 7
- 229910000040 hydrogen fluoride Inorganic materials 0.000 claims abstract description 6
- 229910000358 iron sulfate Inorganic materials 0.000 claims abstract description 6
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 claims abstract description 6
- 229910052943 magnesium sulfate Inorganic materials 0.000 claims abstract description 6
- 239000000203 mixture Substances 0.000 claims description 72
- 239000007787 solid Substances 0.000 claims description 55
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 38
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 32
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 30
- 239000011575 calcium Substances 0.000 claims description 21
- 229910052791 calcium Inorganic materials 0.000 claims description 21
- 229910052742 iron Inorganic materials 0.000 claims description 21
- 239000002244 precipitate Substances 0.000 claims description 20
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 17
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims description 16
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 claims description 16
- ANBBXQWFNXMHLD-UHFFFAOYSA-N aluminum;sodium;oxygen(2-) Chemical compound [O-2].[O-2].[Na+].[Al+3] ANBBXQWFNXMHLD-UHFFFAOYSA-N 0.000 claims description 16
- 239000001110 calcium chloride Substances 0.000 claims description 16
- 229910001628 calcium chloride Inorganic materials 0.000 claims description 16
- 235000011148 calcium chloride Nutrition 0.000 claims description 16
- 229910001388 sodium aluminate Inorganic materials 0.000 claims description 16
- 239000012535 impurity Substances 0.000 claims description 15
- XFXPMWWXUTWYJX-UHFFFAOYSA-N Cyanide Chemical compound N#[C-] XFXPMWWXUTWYJX-UHFFFAOYSA-N 0.000 claims description 14
- 229910052921 ammonium sulfate Inorganic materials 0.000 claims description 12
- 239000007795 chemical reaction product Substances 0.000 claims description 12
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 claims description 10
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 claims description 10
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 claims description 10
- 235000011130 ammonium sulphate Nutrition 0.000 claims description 10
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 claims description 10
- 239000000347 magnesium hydroxide Substances 0.000 claims description 10
- 229910001862 magnesium hydroxide Inorganic materials 0.000 claims description 10
- 235000012254 magnesium hydroxide Nutrition 0.000 claims description 10
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 claims description 9
- 239000011449 brick Substances 0.000 claims description 9
- 239000003518 caustics Substances 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 9
- 235000011149 sulphuric acid Nutrition 0.000 claims description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 8
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 claims description 8
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 8
- 235000014413 iron hydroxide Nutrition 0.000 claims description 8
- NCNCGGDMXMBVIA-UHFFFAOYSA-L iron(ii) hydroxide Chemical compound [OH-].[OH-].[Fe+2] NCNCGGDMXMBVIA-UHFFFAOYSA-L 0.000 claims description 8
- 239000001301 oxygen Substances 0.000 claims description 8
- 229910052760 oxygen Inorganic materials 0.000 claims description 8
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 7
- 239000000920 calcium hydroxide Substances 0.000 claims description 7
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 7
- 235000011116 calcium hydroxide Nutrition 0.000 claims description 7
- 239000006193 liquid solution Substances 0.000 claims description 6
- 239000011236 particulate material Substances 0.000 claims description 6
- 238000011084 recovery Methods 0.000 claims description 6
- 235000019270 ammonium chloride Nutrition 0.000 claims description 5
- 150000002681 magnesium compounds Chemical class 0.000 claims description 5
- 230000001376 precipitating effect Effects 0.000 claims description 5
- 150000004645 aluminates Chemical class 0.000 claims description 4
- 238000001914 filtration Methods 0.000 claims description 4
- 150000002222 fluorine compounds Chemical class 0.000 claims description 4
- 229910001629 magnesium chloride Inorganic materials 0.000 claims description 4
- 229910052757 nitrogen Inorganic materials 0.000 claims description 4
- 238000005498 polishing Methods 0.000 claims description 4
- 239000006227 byproduct Substances 0.000 claims description 3
- 150000003841 chloride salts Chemical class 0.000 claims description 3
- FBAFATDZDUQKNH-UHFFFAOYSA-M iron chloride Chemical compound [Cl-].[Fe] FBAFATDZDUQKNH-UHFFFAOYSA-M 0.000 claims description 3
- 229910052925 anhydrite Inorganic materials 0.000 claims description 2
- 230000014759 maintenance of location Effects 0.000 claims description 2
- 239000000243 solution Substances 0.000 claims 21
- 239000002198 insoluble material Substances 0.000 claims 7
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims 5
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims 4
- 239000007864 aqueous solution Substances 0.000 claims 4
- 239000008246 gaseous mixture Substances 0.000 claims 4
- 229910017604 nitric acid Inorganic materials 0.000 claims 4
- VLTRZXGMWDSKGL-UHFFFAOYSA-N perchloric acid Chemical compound OCl(=O)(=O)=O VLTRZXGMWDSKGL-UHFFFAOYSA-N 0.000 claims 4
- 239000000758 substrate Substances 0.000 claims 4
- 229910021506 iron(II) hydroxide Inorganic materials 0.000 claims 2
- 230000001590 oxidative effect Effects 0.000 claims 2
- 229910021577 Iron(II) chloride Inorganic materials 0.000 claims 1
- 238000001035 drying Methods 0.000 claims 1
- NMCUIPGRVMDVDB-UHFFFAOYSA-L iron dichloride Chemical compound Cl[Fe]Cl NMCUIPGRVMDVDB-UHFFFAOYSA-L 0.000 claims 1
- 230000003647 oxidation Effects 0.000 claims 1
- 238000007254 oxidation reaction Methods 0.000 claims 1
- 238000010979 pH adjustment Methods 0.000 claims 1
- 229940043430 calcium compound Drugs 0.000 abstract description 6
- 150000001674 calcium compounds Chemical class 0.000 abstract description 6
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 abstract description 6
- 150000002506 iron compounds Chemical class 0.000 abstract description 5
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical class [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 abstract description 4
- 150000003388 sodium compounds Chemical class 0.000 abstract description 3
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 abstract description 2
- 238000003860 storage Methods 0.000 description 11
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 description 10
- 229910052863 mullite Inorganic materials 0.000 description 10
- 238000004519 manufacturing process Methods 0.000 description 9
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 8
- 229910002092 carbon dioxide Inorganic materials 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 7
- 239000002699 waste material Substances 0.000 description 7
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 6
- -1 e.g. Substances 0.000 description 6
- 150000001875 compounds Chemical class 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 230000007613 environmental effect Effects 0.000 description 5
- 231100001261 hazardous Toxicity 0.000 description 5
- 239000000383 hazardous chemical Substances 0.000 description 5
- 238000010926 purge Methods 0.000 description 5
- 150000007513 acids Chemical class 0.000 description 4
- 239000001569 carbon dioxide Substances 0.000 description 4
- 239000004568 cement Substances 0.000 description 4
- 239000000446 fuel Substances 0.000 description 4
- 239000002920 hazardous waste Substances 0.000 description 4
- 229910000000 metal hydroxide Inorganic materials 0.000 description 4
- 150000004692 metal hydroxides Chemical class 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- 239000011521 glass Substances 0.000 description 3
- 159000000003 magnesium salts Chemical class 0.000 description 3
- 239000007800 oxidant agent Substances 0.000 description 3
- 239000011343 solid material Substances 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 229910001854 alkali hydroxide Inorganic materials 0.000 description 2
- 229910001860 alkaline earth metal hydroxide Inorganic materials 0.000 description 2
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 description 2
- 235000011132 calcium sulphate Nutrition 0.000 description 2
- 239000003575 carbonaceous material Substances 0.000 description 2
- 238000012937 correction Methods 0.000 description 2
- 150000004673 fluoride salts Chemical class 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- 229910001510 metal chloride Inorganic materials 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 150000002825 nitriles Chemical class 0.000 description 2
- 231100000252 nontoxic Toxicity 0.000 description 2
- 230000003000 nontoxic effect Effects 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- 101100004392 Arabidopsis thaliana BHLH147 gene Proteins 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 238000009626 Hall-Héroult process Methods 0.000 description 1
- MXRIRQGCELJRSN-UHFFFAOYSA-N O.O.O.[Al] Chemical compound O.O.O.[Al] MXRIRQGCELJRSN-UHFFFAOYSA-N 0.000 description 1
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 239000011233 carbonaceous binding agent Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010960 commercial process Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 230000029087 digestion Effects 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000010433 feldspar Substances 0.000 description 1
- 230000005294 ferromagnetic effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- 239000008235 industrial water Substances 0.000 description 1
- 231100001231 less toxic Toxicity 0.000 description 1
- 239000006148 magnetic separator Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 150000004760 silicates Chemical class 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 159000000000 sodium salts Chemical class 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 238000010408 sweeping Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 239000002341 toxic gas Substances 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Classifications
-
- 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
Landscapes
- Processing Of Solid Wastes (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
On décrit un procédé permettant de traiter de la matière de revêtement usagée provenant de cuves électrolytiques de production d'aluminium et de récupérer des produits utiles. Dans ce procédé, la matière de revêtement usagé est introduite dans un digesteur acide (24) contenant par exemple, de l'acide sulfurique. Un élément gazeux est produit et contient du fluorure d'hydrogène et du cyanure d'hydrogène. Un élément de pâte est produit, celui-ci contenant du carbone, de la silice, de l'alumine, des composés de sodium tels que le sulfate de sodium, des composés d'aluminium tels que le sulfate d'aluminium, des composés de fer tels que le sulfate de fer, des composés de magnésium et de calcium tels que le sulfate de magnésium et de calcium. L'élément de pâte reste dans le digesteur après la sortie de l'élément gazeux, ce dernier étant récupéré et chauffé suffisamment pour transformer ou décomposer efficacement le cyanure d'hydrogène en un élément gazeux restant contenant du dioxyde de carbone, de l'eau et des oxydes d'azote ainsi que du gaz HF. L'élément gazeux restant est envoyé dans un épurateur à eau (44) dans lequel le gaz HF est transformé en acide fluorhydrique liquide, ce dernier étant ensuite mélangé avec de l'hydroxyde d'aluminium pour former du fluorure d'aluminium et de l'eau.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/US1997/022650 WO1999029625A1 (fr) | 1995-12-08 | 1997-12-11 | Procede de traitement de matiere provenant d'un revetement usage provenant d'une cuve electrolytique de production d'aluminium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2314123A1 CA2314123A1 (fr) | 1999-06-17 |
| CA2314123C true CA2314123C (fr) | 2006-06-20 |
Family
ID=22262248
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2314123 Expired - Fee Related CA2314123C (fr) | 1997-12-11 | 1997-12-11 | Procede de traitement de matiere provenant d'un revetement usage provenant d'une cuve electrolytique de production d'aluminium |
Country Status (2)
| Country | Link |
|---|---|
| AU (1) | AU749436B2 (fr) |
| CA (1) | CA2314123C (fr) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1853529A1 (fr) * | 2005-02-16 | 2007-11-14 | Novafrit International Inc. | Procede et appareil permettant de transformer des brasques usees en fritte de verre et produits ainsi obtenus |
| CN108926977A (zh) * | 2018-09-17 | 2018-12-04 | 云南云铝润鑫铝业有限公司 | 一种铝电解废槽衬预浸出系统 |
| CN111116061B (zh) * | 2019-12-31 | 2024-11-29 | 米易东立矿业有限公司 | 纳米氢氧化钙的干法制备方法 |
| EP4126406A4 (fr) * | 2020-03-22 | 2024-04-24 | Pyrogenesis Canada Inc. | Procédé au plasma pour convertir une brasque usée (spl) en scories inertes, en fluorure d'aluminium et en énergie |
| CN111517349A (zh) * | 2020-05-13 | 2020-08-11 | 河南联宜环保工程有限公司 | 一种从铝电解槽大修渣中回收氟化铝的方法 |
| CN113292088B (zh) * | 2021-05-19 | 2023-04-14 | 神华准能资源综合开发有限公司 | 一种从结晶氯化铝生产低镁和低钙氧化铝的方法 |
| CN118719784B (zh) * | 2024-07-11 | 2025-06-06 | 郑州大学 | 铝工业含氟固废的处置方法 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4113831A (en) * | 1975-10-02 | 1978-09-12 | National Fluoride And Chemical Corporation | Recovery of sodium fluoride and other chemicals from spent carbon liners |
-
1997
- 1997-12-11 CA CA 2314123 patent/CA2314123C/fr not_active Expired - Fee Related
- 1997-12-11 AU AU58975/98A patent/AU749436B2/en not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| AU749436B2 (en) | 2002-06-27 |
| CA2314123A1 (fr) | 1999-06-17 |
| AU5897598A (en) | 1999-06-28 |
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