EP0486410A1 - Verfahren zur Nassbehandlung von verbrauchten Auskleidungen der elektrolytischen Hall-Héroult-Zellen - Google Patents

Verfahren zur Nassbehandlung von verbrauchten Auskleidungen der elektrolytischen Hall-Héroult-Zellen Download PDF

Info

Publication number: EP0486410A1
Authority: EP; European Patent Office
Prior art keywords: suspension; treatment; pot; lime; linings
Prior art date: 1990-11-16
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.): Granted

Application number

EP91420402A

Other languages

English (en)

French (fr)

Other versions

EP0486410B1 (de

Inventor

Jean-Claude Bontron

Pierre-Bernard Personnet

Jean-Michel Lamerant

Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

Rio Tinto France SAS

Original Assignee

Aluminium Pechiney SA

Priority date (The priority date 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 date listed.)

1990-11-16

Filing date

1991-11-14

Publication date

1992-05-20

1991-11-14 Application filed by Aluminium Pechiney SA filed Critical Aluminium Pechiney SA

1992-05-20 Publication of EP0486410A1 publication Critical patent/EP0486410A1/de

1995-03-01 Application granted granted Critical

1995-03-01 Publication of EP0486410B1 publication Critical patent/EP0486410B1/de

2011-11-14 Anticipated expiration legal-status Critical

Status Expired - Lifetime legal-status Critical Current

Links

238000000034 method Methods 0.000 title claims abstract description 38
238000011282 treatment Methods 0.000 title claims abstract description 26
239000000725 suspension Substances 0.000 claims abstract description 37
HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 30
150000001875 compounds Chemical class 0.000 claims abstract description 21
235000008733 Citrus aurantifolia Nutrition 0.000 claims abstract description 16
235000011941 Tilia x europaea Nutrition 0.000 claims abstract description 16
239000004571 lime Substances 0.000 claims abstract description 16
239000004927 clay Substances 0.000 claims abstract description 6
239000012736 aqueous medium Substances 0.000 claims abstract description 5
-1 alkali metal cyanides Chemical class 0.000 claims abstract description 4
XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 21
238000005406 washing Methods 0.000 claims description 19
229910052731 fluorine Inorganic materials 0.000 claims description 18
NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 18
239000011734 sodium Substances 0.000 claims description 17
239000011737 fluorine Substances 0.000 claims description 16
YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims description 15
239000000203 mixture Substances 0.000 claims description 15
229910004261 CaF 2 Inorganic materials 0.000 claims description 14
229910052708 sodium Inorganic materials 0.000 claims description 12
239000005995 Aluminium silicate Substances 0.000 claims description 10
DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 10
235000012211 aluminium silicate Nutrition 0.000 claims description 10
239000007787 solid Substances 0.000 claims description 9
230000015572 biosynthetic process Effects 0.000 claims description 8
150000002222 fluorine compounds Chemical class 0.000 claims description 8
238000000227 grinding Methods 0.000 claims description 8
229910052622 kaolinite Inorganic materials 0.000 claims description 8
239000002245 particle Substances 0.000 claims description 6
238000001556 precipitation Methods 0.000 claims description 6
239000003643 water by type Substances 0.000 claims description 6
XFXPMWWXUTWYJX-UHFFFAOYSA-N Cyanide Chemical compound N#[C-] XFXPMWWXUTWYJX-UHFFFAOYSA-N 0.000 claims description 5
229910052799 carbon Inorganic materials 0.000 claims description 4
238000005470 impregnation Methods 0.000 claims description 4
239000002244 precipitate Substances 0.000 claims description 4
OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 3
229910052791 calcium Inorganic materials 0.000 claims description 3
239000011575 calcium Substances 0.000 claims description 3
238000005219 brazing Methods 0.000 claims description 2
229910052900 illite Inorganic materials 0.000 claims description 2
VGIBGUSAECPPNB-UHFFFAOYSA-L nonaaluminum;magnesium;tripotassium;1,3-dioxido-2,4,5-trioxa-1,3-disilabicyclo[1.1.1]pentane;iron(2+);oxygen(2-);fluoride;hydroxide Chemical compound [OH-].[O-2].[O-2].[O-2].[O-2].[O-2].[F-].[Mg+2].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[K+].[K+].[K+].[Fe+2].O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2 VGIBGUSAECPPNB-UHFFFAOYSA-L 0.000 claims description 2
238000003756 stirring Methods 0.000 claims description 2
230000000717 retained effect Effects 0.000 claims 1
238000001914 filtration Methods 0.000 abstract description 5
239000010457 zeolite Substances 0.000 abstract description 4
WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 abstract description 3
229910001634 calcium fluoride Inorganic materials 0.000 abstract description 3
229910021536 Zeolite Inorganic materials 0.000 abstract description 2
229910052783 alkali metal Inorganic materials 0.000 abstract description 2
HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 abstract description 2
238000000926 separation method Methods 0.000 abstract description 2
230000004907 flux Effects 0.000 abstract 1
238000010438 heat treatment Methods 0.000 abstract 1
239000007791 liquid phase Substances 0.000 abstract 1
238000003801 milling Methods 0.000 abstract 1
239000007790 solid phase Substances 0.000 abstract 1
238000006243 chemical reaction Methods 0.000 description 11
239000000047 product Substances 0.000 description 11
CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 10
238000002386 leaching Methods 0.000 description 9
238000012360 testing method Methods 0.000 description 7
150000002825 nitriles Chemical class 0.000 description 6
VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 5
229910052782 aluminium Inorganic materials 0.000 description 5
XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 5
238000004519 manufacturing process Methods 0.000 description 5
238000003860 storage Methods 0.000 description 4
OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
BFRXZIMAUMUZJH-UHFFFAOYSA-M [OH-].[Na+].[Na+].[Na+].[Na+].[Al+3].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-] Chemical compound [OH-].[Na+].[Na+].[Na+].[Na+].[Al+3].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-] BFRXZIMAUMUZJH-UHFFFAOYSA-M 0.000 description 3
238000002485 combustion reaction Methods 0.000 description 3
238000005868 electrolysis reaction Methods 0.000 description 3
239000007788 liquid Substances 0.000 description 3
239000002609 medium Substances 0.000 description 3
229910052751 metal Inorganic materials 0.000 description 3
239000002184 metal Substances 0.000 description 3
238000011084 recovery Methods 0.000 description 3
230000009466 transformation Effects 0.000 description 3
ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 2
PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
ANBBXQWFNXMHLD-UHFFFAOYSA-N aluminum;sodium;oxygen(2-) Chemical compound [O-2].[O-2].[Na+].[Al+3] ANBBXQWFNXMHLD-UHFFFAOYSA-N 0.000 description 2
238000000354 decomposition reaction Methods 0.000 description 2
238000009826 distribution Methods 0.000 description 2
239000003344 environmental pollutant Substances 0.000 description 2
150000002739 metals Chemical class 0.000 description 2
231100000719 pollutant Toxicity 0.000 description 2
238000004064 recycling Methods 0.000 description 2
239000000377 silicon dioxide Substances 0.000 description 2
229910001388 sodium aluminate Inorganic materials 0.000 description 2
QYLJIYOGHRGUIH-CIUDSAMLSA-N Arg-Ile Chemical compound CC[C@H](C)[C@@H](C(O)=O)NC(=O)[C@@H](N)CCCNC(N)=N QYLJIYOGHRGUIH-CIUDSAMLSA-N 0.000 description 1
238000004131 Bayer process Methods 0.000 description 1
229910014155 Na—Pt Inorganic materials 0.000 description 1
XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
239000002253 acid Substances 0.000 description 1
239000000654 additive Substances 0.000 description 1
238000005054 agglomeration Methods 0.000 description 1
230000002776 aggregation Effects 0.000 description 1
238000013019 agitation Methods 0.000 description 1
239000003513 alkali Substances 0.000 description 1
150000001340 alkali metals Chemical class 0.000 description 1
HIGRAKVNKLCVCA-UHFFFAOYSA-N alumine Chemical compound C1=CC=[Al]C=C1 HIGRAKVNKLCVCA-UHFFFAOYSA-N 0.000 description 1
229910052908 analcime Inorganic materials 0.000 description 1
239000000440 bentonite Substances 0.000 description 1
229910000278 bentonite Inorganic materials 0.000 description 1
SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 1
230000000903 blocking effect Effects 0.000 description 1
AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
239000000920 calcium hydroxide Substances 0.000 description 1
235000011116 calcium hydroxide Nutrition 0.000 description 1
229910001861 calcium hydroxide Inorganic materials 0.000 description 1
239000000292 calcium oxide Substances 0.000 description 1
235000012255 calcium oxide Nutrition 0.000 description 1
KXZJHVJKXJLBKO-UHFFFAOYSA-N chembl1408157 Chemical compound N=1C2=CC=CC=C2C(C(=O)O)=CC=1C1=CC=C(O)C=C1 KXZJHVJKXJLBKO-UHFFFAOYSA-N 0.000 description 1
239000003153 chemical reaction reagent Substances 0.000 description 1
230000000052 comparative effect Effects 0.000 description 1
238000001816 cooling Methods 0.000 description 1
229910001610 cryolite Inorganic materials 0.000 description 1
230000001419 dependent effect Effects 0.000 description 1
238000013461 design Methods 0.000 description 1
238000010586 diagram Methods 0.000 description 1
GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 description 1
230000005496 eutectics Effects 0.000 description 1
230000002349 favourable effect Effects 0.000 description 1
239000000945 filler Substances 0.000 description 1
230000004927 fusion Effects 0.000 description 1
239000013529 heat transfer fluid Substances 0.000 description 1
230000007062 hydrolysis Effects 0.000 description 1
238000006460 hydrolysis reaction Methods 0.000 description 1
239000012535 impurity Substances 0.000 description 1
238000009434 installation Methods 0.000 description 1
239000012212 insulator Substances 0.000 description 1
238000010169 landfilling Methods 0.000 description 1
229910052901 montmorillonite Inorganic materials 0.000 description 1
230000001590 oxidative effect Effects 0.000 description 1
238000012856 packing Methods 0.000 description 1
230000035699 permeability Effects 0.000 description 1
238000002360 preparation method Methods 0.000 description 1
230000035484 reaction time Effects 0.000 description 1
239000011819 refractory material Substances 0.000 description 1
230000001105 regulatory effect Effects 0.000 description 1
238000003303 reheating Methods 0.000 description 1
229910052710 silicon Inorganic materials 0.000 description 1
239000010703 silicon Substances 0.000 description 1
150000003385 sodium Chemical class 0.000 description 1
235000017550 sodium carbonate Nutrition 0.000 description 1
229910000029 sodium carbonate Inorganic materials 0.000 description 1
238000005476 soldering Methods 0.000 description 1
238000007711 solidification Methods 0.000 description 1
230000008023 solidification Effects 0.000 description 1
238000009987 spinning Methods 0.000 description 1
239000000126 substance Substances 0.000 description 1
238000007669 thermal treatment Methods 0.000 description 1

Images

Classifications

- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
- A62D3/00—Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances
- A62D3/30—Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances by reacting with chemical agents
- A62D3/35—Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances by reacting with chemical agents by hydrolysis
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
- A62D3/00—Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances
- A62D3/30—Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances by reacting with chemical agents
- A62D3/33—Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances by reacting with chemical agents by chemical fixing the harmful substance, e.g. by chelation or complexation
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
- C25C3/00—Electrolytic production, recovery or refining of metals by electrolysis of melts
- C25C3/06—Electrolytic production, recovery or refining of metals by electrolysis of melts of aluminium
- C25C3/08—Cell construction, e.g. bottoms, walls, cathodes
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
- A62D2101/00—Harmful chemical substances made harmless, or less harmful, by effecting chemical change
- A62D2101/40—Inorganic substances
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
- A62D2101/00—Harmful chemical substances made harmless, or less harmful, by effecting chemical change
- A62D2101/40—Inorganic substances
- A62D2101/45—Inorganic substances containing nitrogen or phosphorus
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
- A62D2101/00—Harmful chemical substances made harmless, or less harmful, by effecting chemical change
- A62D2101/40—Inorganic substances
- A62D2101/49—Inorganic substances containing halogen
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
- A62D2203/00—Aspects of processes for making harmful chemical substances harmless, or less harmful, by effecting chemical change in the substances
- A62D2203/02—Combined processes involving two or more distinct steps covered by groups A62D3/10 - A62D3/40

Definitions

the method according to the invention relates to a treatment for insolubilization by the wet method of used soldering for the purpose of their storage or their landfill.
These mixtures of variable composition consist of carbonaceous products (30% to 50% by weight) but also of refractory elements, generally of the silico-aluminous type, impregnated with cyanides (CN - 1% by weight) of fluorinated compounds (FZ 20%) generally alkaline, sodium (Na - 20%) mainly in the state of NaF.
the method according to the invention is based on the observation that it is possible to recombine, with inexpensive and readily available additives, almost all of the fluorine of the fluorinated compounds impregnating the spent pot lining as well as the free soda produced from the causticization reaction, to form insoluble compounds which are easily filterable, while the remaining soluble compounds such as cyanides, generally in the state of sodium cyanide, are dissociated under the conditions of temperature and pressure chosen to carry out these reactions of insolubilization.
the amount of free sodium hydroxide obviously varies according to the chemical composition of the pot lining and the proportion of pot lining crushed in the suspension.
the addition of kaolinite is regulated between 0.12 and 0.20 kg per kg of suspension, the weight composition of which, for sodium contents in the used pot lining generally between 10% and 15% by weight, varies in the following proportions:
kaolinite In addition to kaolinite, it is worth mentioning among the main clays which can be used illite and smectites such as montmorillonite, bentonite, which by fixing the free soda lead to the formation of a mixture of insoluble zeolites (analcime and zeolite Na-Pt). More generally, the mixtures thus formed are synthetic feldspathoids or zeolites.
reaction temperature which must be above 140 ° C. and preferably between 180 ° C and 250 ° C.
the increase in temperature promotes, on the one hand the reaction in the direction of the transformation of the clay into insoluble synthetic compound by fixation of free soda, on the other hand the decomposition of the cyanides by hydrolysis according to the basic reaction
the excellent permeability of the solid cake is observed, which can be washed effectively with a relatively small volume of water since the "wash ratio" is that is to say the volume of water necessary for washing relative to the volume of water impregnating the wet cake after spinning, is substantially close to 1.
the mother liquors and the washing waters are combined to form a weakly alkaline liquor which is recycled in the first two stages of the process for the preparation of the pot lining and lime suspensions on the one hand and kaolin on the other hand.
the wet residue As for the wet residue, it is subjected to a leaching test according to French standard X 31-210 to determine the levels of cyanide, sodium and fluorine; the CN content by weight must remain below 0.01% and the fluorine content must remain below a limit which varies, according to the national standards in force, between 0.05% and 0.3%.
Table 1 summarizes the most significant characteristics of comparative tests of autoclave treatments, for 3 hours, at different temperatures 145 ° C, 180 ° C and 220 ° C of 3 samples of 2 kg of a suspension of "all comings" crushed pot lining whose fluorine and sodium contents were 10.1% and 14.9% respectively.
the weight composition of the 2 kg samples was 0.47 kg of pot lining, 0.1 kg of slaked lime and 1.43 kg of water.
the proportion of kaolin subsequently added was 0.15 kg per kg of suspension.
the suspension after autoclaving was cooled to below 100 ° C and filtered under a vacuum of 500 mm Hg.
an autogenous grinder is fed simultaneously with the crushed product 2 at a rate of 1 t / h, quicklime 3 (grain size 0-10 mm) at a rate of 0.25 t / h, recycled liquor 4 at a rate of 4, Om 3 / h.
the autogenous crusher operates in a closed circuit on a 1 mm mesh screen.
the suspension obtained 5 is stored in a stirred tank for an average period of 1 hour.
a heat transfer fluid rotates in a closed circuit between the two exchangers and a boiler where an additional thermal energy is made 21, 22 and 23.
the cooled suspension 13 is then filtered and the cake formed is washed on a band filter.
the mother liquors 15 and the washing waters 17 representing a total of 5.5 m 3 / h are combined in a storage tank to form the recycled liquor 4 and 6.
the washing water 16 is 3.1 m 3 / hour compensates for the loss of water by impregnating the residue.
wet residue has a total weight of 5.5 tonnes, including 3.1 tonnes of water.

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Chemical & Material Sciences (AREA)
Chemical Kinetics & Catalysis (AREA)
Emergency Management (AREA)
General Health & Medical Sciences (AREA)
Business, Economics & Management (AREA)
General Chemical & Material Sciences (AREA)
Toxicology (AREA)
Health & Medical Sciences (AREA)
Organic Chemistry (AREA)
Electrochemistry (AREA)
Metallurgy (AREA)
Materials Engineering (AREA)
Engineering & Computer Science (AREA)
Processing Of Solid Wastes (AREA)
Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
Water Treatment By Electricity Or Magnetism (AREA)

EP91420402A 1990-11-16 1991-11-14 Verfahren zur Nassbehandlung von verbrauchten Auskleidungen der elektrolytischen Hall-Héroult-Zellen Expired - Lifetime EP0486410B1 (de)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
FR9014825		1990-11-16
FR9014825A FR2669350B1 (fr)	1990-11-16	1990-11-16	Procede de traitement par voie humide de brasquages uses provenant de cuves d'electrolyse hall-heroult.

Publications (2)

Publication Number	Publication Date
EP0486410A1 true EP0486410A1 (de)	1992-05-20
EP0486410B1 EP0486410B1 (de)	1995-03-01

Family

ID=9402646

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP91420402A Expired - Lifetime EP0486410B1 (de)	1990-11-16	1991-11-14	Verfahren zur Nassbehandlung von verbrauchten Auskleidungen der elektrolytischen Hall-Héroult-Zellen

Country Status (12)

Country	Link
US (1)	US5245116A (de)
EP (1)	EP0486410B1 (de)
AU (1)	AU632717B2 (de)
CA (1)	CA2055135A1 (de)
DE (1)	DE69107796T2 (de)
ES (1)	ES2069254T3 (de)
FR (1)	FR2669350B1 (de)
GR (1)	GR3015282T3 (de)
IS (1)	IS3779A7 (de)
NO (1)	NO178363C (de)
NZ (1)	NZ240534A (de)
ZA (1)	ZA919066B (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
FR2756198A1 (fr) *	1996-11-26	1998-05-29	Pechiney Aluminium	Procede d'insolubilisation et de consolidation de brasques usees provenant des cuves d'electrolyse hall-heroult

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
ZA935347B (en) *	1992-07-24	1994-03-14	Comalco Alu	Treatment of solid material
US5470559A (en) *	1993-02-26	1995-11-28	Alcan International Limited	Recycling of spent pot linings
US5558690A (en) *	1994-12-23	1996-09-24	Vortec Corporation	Manufacture of ceramic tiles from spent aluminum potlining
US5538604A (en) *	1995-01-20	1996-07-23	Emec Consultants	Suppression of cyanide formation in electrolytic cell lining
EP0892765A4 (de) *	1996-04-09	2000-03-15	Vortec Corp	Herstellung von keramischen fliesen aus flugaschen
WO1998030499A1 (en) *	1997-01-14	1998-07-16	Cashman Joseph B	Detoxifying aluminum spent potliners
CA2588929A1 (fr) *	2007-05-11	2008-11-11	Institut National De La Recherche Scientifique (Inrs)	Procede de traitement des dechets d'aluminerie contamines par des hydrocarbures aromatiques polycycliques (hap) et des fluorures
ES2306618B1 (es) *	2008-04-04	2009-07-20	Xiloga, S.L	Procedimiento de reciclado de spent pot linings (spls) procedentes de la produccion de aluminio primario.
US20110081284A1 (en) *	2009-10-02	2011-04-07	Mark Weaver	Treatment of bauxite residue and spent pot lining
WO2014026138A1 (en) *	2012-08-09	2014-02-13	Alcoa Inc.	High-carbon spent pot lining and methods of fueling a furnace with the same
CN113426807B (zh) *	2021-06-29	2022-05-17	云南云铝润鑫铝业有限公司	铝电解危废渣联合处理和资源综合利用方法
CN113426808B (zh) *	2021-06-29	2022-05-17	云南云铝润鑫铝业有限公司	一种铝电解大修渣加压碱浸回收氟化盐的方法

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- 1991-11-08 NO NO914367A patent/NO178363C/no unknown
- 1991-11-11 NZ NZ240534A patent/NZ240534A/en unknown
- 1991-11-13 AU AU87850/91A patent/AU632717B2/en not_active Ceased
- 1991-11-14 ES ES91420402T patent/ES2069254T3/es not_active Expired - Lifetime
- 1991-11-14 EP EP91420402A patent/EP0486410B1/de not_active Expired - Lifetime
- 1991-11-14 DE DE69107796T patent/DE69107796T2/de not_active Expired - Fee Related
- 1991-11-15 ZA ZA919066A patent/ZA919066B/xx unknown
- 1991-11-18 US US07/793,114 patent/US5245116A/en not_active Expired - Fee Related
1995
- 1995-03-03 GR GR950400459T patent/GR3015282T3/el unknown

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Also Published As

Publication number	Publication date
AU632717B2 (en)	1993-01-07
AU8785091A (en)	1992-05-21
NO914367D0 (no)	1991-11-08
NO178363C (no)	1996-03-13
FR2669350A1 (fr)	1992-05-22
DE69107796D1 (de)	1995-04-06
FR2669350B1 (fr)	1993-01-15
CA2055135A1 (fr)	1992-05-17
NO914367L (no)	1992-05-18
ES2069254T3 (es)	1995-05-01
NZ240534A (en)	1994-05-26
IS3779A7 (is)	1992-05-17
GR3015282T3 (en)	1995-06-30
DE69107796T2 (de)	1995-06-29
ZA919066B (en)	1992-08-26
NO178363B (no)	1995-12-04
EP0486410B1 (de)	1995-03-01
US5245116A (en)	1993-09-14

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