NO771811L - PROCEDURES FOR PREPARATION OF IRONOUS RESIDUES FROM THE ZINC ELECTROLYSIS BY PRESSURE CONNECTION WITH WATER - Google Patents
PROCEDURES FOR PREPARATION OF IRONOUS RESIDUES FROM THE ZINC ELECTROLYSIS BY PRESSURE CONNECTION WITH WATERInfo
- Publication number
- NO771811L NO771811L NO771811A NO771811A NO771811L NO 771811 L NO771811 L NO 771811L NO 771811 A NO771811 A NO 771811A NO 771811 A NO771811 A NO 771811A NO 771811 L NO771811 L NO 771811L
- Authority
- NO
- Norway
- Prior art keywords
- zinc
- iron
- water
- residue
- copper
- Prior art date
Links
- 239000011701 zinc Substances 0.000 title claims abstract description 47
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 title claims abstract description 46
- 229910052725 zinc Inorganic materials 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 title claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 14
- 238000005868 electrolysis reaction Methods 0.000 title claims abstract description 5
- 230000029087 digestion Effects 0.000 claims abstract description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 64
- 229910052742 iron Inorganic materials 0.000 claims description 24
- 239000010949 copper Substances 0.000 claims description 19
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 18
- 229910052802 copper Inorganic materials 0.000 claims description 18
- 229910052793 cadmium Inorganic materials 0.000 claims description 17
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 claims description 17
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 14
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 claims description 7
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims description 6
- 239000007787 solid Substances 0.000 claims description 4
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 claims description 3
- 238000000605 extraction Methods 0.000 claims description 3
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 claims description 2
- 229910052921 ammonium sulfate Inorganic materials 0.000 claims description 2
- 235000011130 ammonium sulphate Nutrition 0.000 claims description 2
- 239000001166 ammonium sulphate Substances 0.000 claims description 2
- 238000001816 cooling Methods 0.000 claims description 2
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 claims 1
- QCUOBSQYDGUHHT-UHFFFAOYSA-L cadmium sulfate Chemical compound [Cd+2].[O-]S([O-])(=O)=O QCUOBSQYDGUHHT-UHFFFAOYSA-L 0.000 claims 1
- 230000003647 oxidation Effects 0.000 claims 1
- 238000007254 oxidation reaction Methods 0.000 claims 1
- 150000003568 thioethers Chemical class 0.000 claims 1
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical group [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 abstract 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 10
- 229910052709 silver Inorganic materials 0.000 description 9
- 239000004332 silver Substances 0.000 description 9
- 238000001914 filtration Methods 0.000 description 7
- 238000002386 leaching Methods 0.000 description 7
- 239000005864 Sulphur Substances 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 229910052717 sulfur Inorganic materials 0.000 description 5
- 239000011593 sulfur Substances 0.000 description 5
- 239000002253 acid Substances 0.000 description 4
- 239000000706 filtrate Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 150000002739 metals Chemical class 0.000 description 3
- 239000007800 oxidant agent Substances 0.000 description 3
- 238000000209 wet digestion Methods 0.000 description 3
- -1 Cu + + Chemical class 0.000 description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 229910001308 Zinc ferrite Inorganic materials 0.000 description 2
- 150000001768 cations Chemical class 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- KFZAUHNPPZCSCR-UHFFFAOYSA-N iron zinc Chemical compound [Fe].[Zn] KFZAUHNPPZCSCR-UHFFFAOYSA-N 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 150000004763 sulfides Chemical class 0.000 description 2
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 2
- 229910021653 sulphate ion Inorganic materials 0.000 description 2
- WGEATSXPYVGFCC-UHFFFAOYSA-N zinc ferrite Chemical compound O=[Zn].O=[Fe]O[Fe]=O WGEATSXPYVGFCC-UHFFFAOYSA-N 0.000 description 2
- NWONKYPBYAMBJT-UHFFFAOYSA-L zinc sulfate Chemical compound [Zn+2].[O-]S([O-])(=O)=O NWONKYPBYAMBJT-UHFFFAOYSA-L 0.000 description 2
- 235000009529 zinc sulphate Nutrition 0.000 description 2
- 229910000859 α-Fe Inorganic materials 0.000 description 2
- KEQXNNJHMWSZHK-UHFFFAOYSA-L 1,3,2,4$l^{2}-dioxathiaplumbetane 2,2-dioxide Chemical compound [Pb+2].[O-]S([O-])(=O)=O KEQXNNJHMWSZHK-UHFFFAOYSA-L 0.000 description 1
- 239000005569 Iron sulphate Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 229910052785 arsenic Inorganic materials 0.000 description 1
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 1
- 229940065285 cadmium compound Drugs 0.000 description 1
- 150000001662 cadmium compounds Chemical class 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- ARUVKPQLZAKDPS-UHFFFAOYSA-L copper(II) sulfate Chemical class [Cu+2].[O-][S+2]([O-])([O-])[O-] ARUVKPQLZAKDPS-UHFFFAOYSA-L 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000005188 flotation Methods 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 150000002505 iron Chemical class 0.000 description 1
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 description 1
- BMWMWYBEJWFCJI-UHFFFAOYSA-K iron(3+);trioxido(oxo)-$l^{5}-arsane Chemical compound [Fe+3].[O-][As]([O-])([O-])=O BMWMWYBEJWFCJI-UHFFFAOYSA-K 0.000 description 1
- 229910052935 jarosite Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000010970 precious metal Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- WGPCGCOKHWGKJJ-UHFFFAOYSA-N sulfanylidenezinc Chemical compound [Zn]=S WGPCGCOKHWGKJJ-UHFFFAOYSA-N 0.000 description 1
- 235000019352 zinc silicate Nutrition 0.000 description 1
- 229910052984 zinc sulfide Inorganic materials 0.000 description 1
- 239000011686 zinc sulphate Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B19/00—Obtaining zinc or zinc oxide
- C22B19/30—Obtaining zinc or zinc oxide from metallic residues or scraps
-
- 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
- C22B19/00—Obtaining zinc or zinc oxide
- C22B19/20—Obtaining zinc otherwise than by distilling
-
- 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
Fremgangsmåte til opparbeidelse av jernholdig residu fra sinkelektrolysen ved /trykkoppslutning med vann.Process for the preparation of ferrous residues from zinc electrolysis by / pressure digestion with water.
Description
Oppfinnelsen■vedrører en fremgangsmåte til opparbeidelse av jernholdige residuer frå sinkelektrolysen ved trykkoppslutning med vann. The invention relates to a method for processing iron-containing residues from zinc electrolysis by pressure digestion with water.
Ved den elektrolytiske sinkutvinning lutes i første rekke den ved røsting til oksyd overførte sinkmalm med svovelsur sinksulfatoppløsning(cellesyre) for å bringe sinken som skal ut-vinnes i oppløsning. In electrolytic zinc extraction, the zinc ore converted to oxide by roasting is first leached with a sulphurous zinc sulphate solution (cellular acid) in order to bring the zinc to be extracted into solution.
Ved denne lutning går alt etter de anvendte temperaturer og syrekonsentrasjoner mer eller mindre jern med i oppløs-ningen. Dette jern utfelles ved den etterfølgende lutrensning With this slope, depending on the temperatures and acid concentrations used, more or less iron goes into the solution. This iron is precipitated by the subsequent lye cleaning
i et separat trinn som oksydhydrat og/eller basisk jernsulfat (jarosit, klokkerit). Utfellingen fjernes sammen med det egent-lige lutningsresidujsom inneholder betraktelige mengder sink som i syre tungtoppløselig sinkferrit ZnO.Fe20-^ fra lutnings-kretsløpet ved hjelp av en fast-flytende adskillelse. Dette blandingsprodukt, som også inneholder den samlede syreuoppløse-lige gangart av malmen betegnes i det følgende kort som jernresidu. in a separate step as oxide hydrate and/or basic iron sulphate (jarosite, bellrite). The precipitate is removed together with the actual pitch residue, which contains considerable amounts of zinc as acid-soluble zinc ferrite ZnO.Fe20-^ from the pitch circuit by means of a solid-liquid separation. This mixed product, which also contains the total acid-insoluble phase of the ore, is briefly referred to below as iron residue.
I dette jernresiduet er det anriket det samledeThe whole is enriched in this iron residue
i malmen tilstedeværende bly som blysulfat samt de samlede edel-metaller. Dessuten er det i dette residu å finne i syre ikke oppløste sink-, kobber- og kadmiumforbindelser, og - betinget ved ufullstendig utvaskning - også sinksulfater. lead present in the ore as lead sulphate as well as the total precious metals. In addition, this residue contains zinc, copper and cadmium compounds not dissolved in acid, and - conditional on incomplete leaching - also zinc sulphates.
Lagringen av dette jernresidu på dynger støter på. betraktelige vanskeligheter av økologiske grunner.. Da det under innvirkning av atmosfæren såvel avgir sink som også fri svovelsyre til underlaget, er dets opparbeidelse til utnyttbare eller lagrihgsdyktige produkter et viktig problem med hensyn til den stadige .strengere miljølov. The storage of this iron residue on heaps is encountered. considerable difficulties for ecological reasons. As under the influence of the atmosphere it emits zinc as well as free sulfuric acid to the substrate, its processing into usable or storable products is an important problem with regard to the ever-stricter environmental law.
Ved de fleste kjente fremgangsmåter til opparbeidelse av lutningsresiduer fra sinkfremstilling forsøkes ved økning av syreinnholdet av lutningsmidlet ved lutningstemperaturen og lutningstiden å oppnå en forbedret sinkutlutning. Imidlertid blir de ved hvirvelsjiktrøstning av malmen dannede sink-jern-dobbeltoksyder (ferriter) og sinksilikater ikke eller bare delvis spaltet..ved en slik intens lutningsbehandling. In most known methods for working up leaching residues from zinc production, an attempt is made to achieve an improved leaching of zinc by increasing the acid content of the leaching agent at the leaching temperature and the leaching time. However, the zinc-iron double oxides (ferrites) and zinc silicates formed by fluidized bed roasting of the ore are not or only partially split..by such an intense tilting treatment.
I DAS 1.161.433 omtales en fremgangsmåte til gjen-vinning av sink fra et sink- og jernholdig residu av svovelsur lutning av røstet sinkblende, hvor residuet i flere trinn lutes med vandig svovelsyreoppløsning ved forhøyet temperatur og trykk-. Den kjente fremgangsmåte anvender ved første lutningstrinn et reduksjonsmiddel i en mengde som er tilstrekkelig til i det minste å redusere en del av det i residuet tilstedeværende jern til det toverdige trinn. Bortsett fra at det her dreier seg om en fleretrinns fremgangsmåte er anvendelsen'av svovelsyre obli-gatorisk. DAS 1,161,433 describes a method for recovering zinc from a zinc- and iron-containing residue by sulfuric acid leaching of roasted zinc blende, where the residue is leached in several stages with an aqueous sulfuric acid solution at elevated temperature and pressure. The known method uses a reducing agent in the first gradient step in an amount that is sufficient to reduce at least part of the iron present in the residue to the divalent step. Apart from the fact that this is a multi-step process, the use of sulfuric acid is mandatory.
Til grunn for oppfinnelsen ligger nå den oppgaveThe invention is now based on that task
å tilveiebringe en forbedret fremgangsmåte til- opparbeidelse av jernresiduet fra sinkelektrolyse ved trykkoppslutning med vann, som uten anvendelsen av aggressive oppslutningsmidler fra jernresiduet på den ene side overfører sinken i høyt utbytte, også fra sinkferrit i den. oppløselige form og likeledes omdanner tilstedeværende kobber og kadmium og endelig hoveddelen av jernet i en utnyttbar form. to provide an improved process for processing the iron residue from zinc electrolysis by pressure digestion with water, which without the use of aggressive digestion agents from the iron residue on the one hand transfers the zinc in high yield, also from zinc ferrite in it. soluble form and likewise converts present copper and cadmium and finally the main part of the iron into a usable form.
Denne oppgave løses ifølge oppfinnelsen ved at jernresiduet i et trykkar behandles med vann ved temperaturer fra 250 til 400°C og eventuelt etter tilsetning av et oksydasjons-middel til oksydasjon av eventuelt tilstedeværende sulfider av kobber og kadmium etter avkjøling av oppslutningen oppdeler i lut og fast residu, og ved en lut som omtrent inneholder et samlet sulfat fra jernresiduet i oppløst form sammen med hoved-mengden av sink, kobber og kadmium samt det samlede ammonium som ammoniumsulfat igjen til sinkutvinning. According to the invention, this task is solved by treating the iron residue in a pressure vessel with water at temperatures from 250 to 400°C and optionally after adding an oxidizing agent to oxidize any sulfides of copper and cadmium that may be present, after cooling the digestion divides into lye and solid residue, and in the case of a lye which approximately contains a total sulphate from the iron residue in dissolved form together with the main amount of zinc, copper and cadmium as well as the total ammonium as ammonium sulphate left for zinc extraction.
Ved det faste ved filtrering eller sentrifugering utvunnede residu dreier det seg om mørkerødt, hematitisk jern-III-oksyd i form av et godt avsettbart pulver med omtrent det samlede sølv og bly i.form av sulfat. The solid residue recovered by filtration or centrifugation is dark red, hematitic iron-III-oxide in the form of a easily depositable powder with approximately the total amount of silver and lead in the form of sulphate.
Luten som oppstår ved oppslutningsprosessen inneholder med unntak av det til bly bundne sulfat sulfåtionene av utgangsmaterialet som vannoppløselige sink-, kadmium- og kobber-sulfater såvel som fri svovelsyre. Jerninnholdet•av denne lut avhenger av konsentrasjonen av den dannede fri svovelsyre og der- med av basisitetsgraden av det anvendte jernresidu og den til reaksjonen tilsatte vannmengde. The lye that occurs during the digestion process contains, with the exception of the sulfate bound to lead, the sulfate ions of the starting material as water-soluble zinc, cadmium and copper sulfates as well as free sulfuric acid. The iron content of this lye depends on the concentration of the free sulfuric acid formed and thus on the degree of basicity of the iron residue used and the amount of water added to the reaction.
Ved fremgangsmåten overføres som sulfater i luten: In the process, the following are transferred as sulphates in the lye:
60 til 90% av sink,60 to 90% of zinc,
15 til 70% av kobber,15 to 70% of copper,
35 til 50% av kadmium,35 to 50% of cadmium,
5 til 15/» av jern5 to 15/» of iron
og det samlede ammonium som (NH^^SC^.and the total ammonium as (NH^^SC^.
I oppslutningsresiduet■er det inneholdt:The retention residue■contains:
85 til 95% av jern som'Pe2<0>^<,>85 to 95% of iron as'Pe2<0>^<,>
98% av bly som sulfat,98% of lead as sulfate,
98% av sølv og ca.98% of silver and approx.
85% av arsen som syre- og vannuoppløselig jernarsenat. 85% of the arsenic as acid- and water-insoluble iron arsenate.
Det ble videre fast.slått at ved fremgangsmåten ifølge oppfinnelsen oppsluttes også de ved røstning dannede sinkferriter av sammensetning x ZnO ■.. y Fe20^, som ved normale lutefremgangsmåter med svovelsyre ikke er oppløselige, for en stor del til sinksulfat og jern-III-oksyd. It was further established that with the method according to the invention, the zinc ferrites formed by roasting of composition x ZnO . oxide.
Noen av oppslutningsreaksjonene lar seg rent gene-reit gjengi som følger: Some of the support reactions can be reproduced in a purely generic way as follows:
Me<++>betyr i overnevnte formler et toverdig kation som Cu + +, Cd<++>, Zn<++>osv., mens Me<+>betyr enverdige kationer som K<+>, Na<+>eller NH^<+.> Me<++>in the above formulas means a divalent cation such as Cu + +, Cd<++>, Zn<++>etc., while Me<+>means monovalent cations such as K<+>, Na<+>or NH^<+.>
Ved tilsetning av oksydasjonsmidler som f.eks. mangandioksyd kan utbyttet av sulfidisk bundet kobber og kadmium vesentlig økes ved trykkoppslutning. By adding oxidizing agents such as e.g. manganese dioxide, the yield of sulphidic bound copper and cadmium can be substantially increased by pressure digestion.
Fra faste residuer som dannes ved fremgangsmåten ifølge oppfinnelsen lar det seg ved flotasjon fremstille et bly-konsentrat. Det adskilte jernoksyd kan anvendes til fremstilling av pigment farver. Dessuten lar residuet seg uten adskillelse av bly anvendes som jerntilsetning i en blysjaktovn. From solid residues formed by the method according to the invention, a lead concentrate can be produced by flotation. The separated iron oxide can be used for the production of pigment colours. In addition, the residue can be used without separation of lead as an iron additive in a lead shaft furnace.
Oppfinnelsen skal forklares nærmere ved hjelp av noen eksempler. The invention will be explained in more detail with the help of some examples.
Eksempel 1.Example 1.
300 g uvasket og tørket jernresidu med følgende innhold: 300 g unwashed and dried iron residue with the following content:
7,0% samlet sink,7.0% total zinc,
3,3% vannoppløselig sink,3.3% water-soluble zinc,
30,155 jern, 30.155 iron,
1, 0% bly,1.0% lead,
11,3$ svovel11.3$ sulphur
ble oppsluttet etter tilsetning av 500 ml vann i 3 timer ved 250°C og et trykk på ca. 40 bar. Etter filtrering ble det dannet 0,49 liter filtrat med følgende innhold: was digested after adding 500 ml of water for 3 hours at 250°C and a pressure of approx. 40 bars. After filtration, 0.49 liters of filtrate was formed with the following content:
33j2 g/liter sink,33j2 g/liter zinc,
8,6 g/liter j ern,8.6 g/litre iron,
145,0 g/liter S0^~,145.0 g/liter S0^~,
176,8 g residu (uvasket og tørket).176.8 g residue (unwashed and dried).
Residuet inneholdt:The residue contained:
2, 7% samlet sink,2.7% total zinc,
2,3% vannoppløselig sink,2.3% water-soluble zinc,
1/82 bly,1/82 lead,
48,0% jern,48.0% iron,
5,6% svovel (herav 1,1% bundet til vannoppløselig sink og 0,3% til bly). 5.6% sulfur (of which 1.1% bound to water-soluble zinc and 0.3% to lead).
Av det samlede i det anvendte jernresiduet inne-holdte vannuoppløselige sink (11,1 g) forelå etter den våte oppslutning ifølge oppfinnelsen under trykk 10,4 g eller 9357%i vannoppløselig form. Det mørkerøde residuet inneholdt 94% av det innbragte jern og 29,2% av svovlet. Of the total water-insoluble zinc (11.1 g) contained in the iron residue used, after the wet digestion according to the invention under pressure, 10.4 g or 9357% were present in water-soluble form. The dark red residue contained 94% of the introduced iron and 29.2% of the sulphur.
Eksempel 2.Example 2.
300 g uvasket og tørket jernresidu med følgende innhold: 300 g unwashed and dried iron residue with the following content:
9,6% samlet sink,9.6% total zinc,
2,5% vannoppløselig sink,2.5% water-soluble zinc,
27,2% jern,27.2% iron,
7,8% bly,7.8% lead,
0,36% kobber,0.36% copper,
0, 15% kadmium,0.15% cadmium,
9, 00% svovel,9.00% sulfur,
214 g/tonn sølv214 g/tonne silver
ble oppsluttet etter tilsetning av 500 ml vann i en time ved 300°C og ca. 83 bar. Etter filtrering ble det dannet 0,325 liter filtrat med følgende innhold: was dissolved after the addition of 500 ml of water for one hour at 300°C and approx. 83 bars. After filtration, 0.325 liters of filtrate was formed with the following content:
45 g/liter sink,45 g/litre zinc,
19,5 g/liter jern,19.5 g/litre of iron,
0,55 g/liter kobber,0.55 g/litre copper,
0,49 g/liter kadmium,.0.49 g/litre cadmium,.
144,4 g/liter SojJ",144.4 g/liter SojJ",
202,0 g residu.202.0 g residue.
Residuet, uvasket og tørket'inneholdt:The residue, unwashed and dried, contained:
6,4% samlet sink,6.4% total zinc,
2,48% vannoppløselig sink,2.48% water-soluble zinc,
34,0% jern,34.0% iron,
12,0% bly,12.0% lead,
0,45% kobber,0.45% copper,
0,14% kadmium,0.14% cadmium,
6,1% svovel (herav 1,2% bundet til vannoppløselig sink og 1,9% til bly), 6.1% sulfur (of which 1.2% bound to water-soluble zinc and 1.9% to lead),
310 g/tonn sølv.310 g/tonne silver.
Av det tilsammen tilstedeværende vannuoppløselige sink (21,3 g) overføres ved den våte oppslutning ifølge oppfinnelsen under trykk 14,3 g eller 67,2% i vannoppløs-elig form. Of the water-insoluble zinc (21.3 g) present together, 14.3 g or 67.2% is transferred in water-soluble form by the wet digestion according to the invention under pressure.
Av det anvendte kobber ble bare 16,7% av kadmium bare 35,6% bragt i oppløsning. Det adskilte residuet inneholdt 84,2% av anvendt jern, det samlede bly og sølv og 44% av svovel. Eksempel 3. Of the copper used, only 16.7% of the cadmium and only 35.6% were brought into solution. The separated residue contained 84.2% of used iron, the combined lead and silver and 44% of sulphur. Example 3.
300 g uvasket og tørket jernresidu av samme sammensetning som i eksempel 2 ble det etter tilsetning av 650 ml vann oppsluttet 5 timer ved 300°C og ca. 83 bar. Etter filtrering ble det dannet 0,525 liter filtrat med følgende innhold: 300 g of unwashed and dried iron residue of the same composition as in example 2 was, after adding 650 ml of water, digested for 5 hours at 300°C and approx. 83 bars. After filtration, 0.525 liters of filtrate was formed with the following content:
31,1 g/liter sink,31.1 g/litre zinc,
12,8 g/liter jern,12.8 g/litre of iron,
0,34 g/liter kobber,0.34 g/litre copper,
0,33 g/liter kadmium,0.33 g/litre cadmium,
90,7 g/liter Sojj",90.7 g/litre Sojj",
202,7 g residu.202.7 g residue.
Residuet, uvasket og tørket inneholdt:The residue, unwashed and dried, contained:
6,6% samlet sink,6.6% total zinc,
2, 5% vannoppløselig sink,2.5% water-soluble zinc,
32,8% jern,32.8% iron,
11,6% bly,11.6% lead,
0-, 5% kobber,0-, 5% copper,
0,1% kadmium,0.1% cadmium,
6,2% svovel (herav 1,2% bundet til vannoppløselig sink og 1,9% i bly), 6.2% sulfur (of which 1.2% bound to water-soluble zinc and 1.9% in lead),
300 g/tonn sølv.300 g/tonne silver.
Av det tilsammen tilstedeværende vannoppløselige sink (21,3g) ble det ved den våte oppslutning ifølge oppfinnelsen under trykk overført 6l%, av kobber 16,7% og av kadmium 37,8% i den vannoppløselige form. Residuet inneholdt 8l,6% av det anvendte jern, det samlede bly og sølv og.46,7% av svovlet. Eksempel 4. Of the water-soluble zinc present together (21.3g), 61%, 16.7% of copper and 37.8% of cadmium were transferred in the water-soluble form by the wet digestion according to the invention under pressure. The residue contained 81.6% of the iron used, the combined lead and silver and 46.7% of the sulphur. Example 4.
300 g uvasket og tørket•jernresidu av samme sammensetning som i eksempel 2 ble etter tilsetning av 600 ml vann og 15 g Mn02oppsluttet 5 timer ved 300°C og ca. 83 bar. Mn02-tilsetningen foregikk for det formål å oksydere eventuelt tilstedeværende tungmetallsulfider til sulfater. Etter trykkbehand-ling og filtrering ble det dannet 0,55 liter filtrat med følgende innhold: 300 g of unwashed and dried iron residue of the same composition as in example 2 was, after adding 600 ml of water and 15 g of Mn02, digested for 5 hours at 300°C and approx. 83 bars. The Mn02 addition took place for the purpose of oxidizing any heavy metal sulphides present to sulphates. After pressure treatment and filtration, 0.55 liters of filtrate was formed with the following content:
34.00 g/liter sink,34.00 g/litre zinc,
0,44 g/liter jern,0.44 g/litre iron,
1.3 g/liter kobber,1.3 g/litre copper,
0,4 g/liter kadmium,0.4 g/litre cadmium,
100,2 g/liter SO^j",100.2 g/liter SO^j",
206,9 g residu.206.9 g residue.
Residuet, uvasket og tørket inneholdt:The residue, unwashed and dried, contained:
4,8 % samlet sink,4.8% total zinc,
1.4 % vannoppløselig sink,1.4% water-soluble zinc,
35,8 % jern,35.8% iron,
11.1 % bly,11.1% lead,
0,3 % kobber,0.3% copper,
0,09% kadmium,0.09% cadmium,
10,8 % svovel (herav 0,7% bundet i vannoppløselig 10.8% sulfur (of which 0.7% bound in water-soluble
sink og 1,7% til bly),zinc and 1.7% for lead),
300 g/tonn sølv.300 g/tonne silver.
Som i eksempel 2 ble det av tilsammen tilstedeværende vannuoppløselig sink overført 67,2% i vannoppløselig form. MnC^-tilsetningen bevirket dessuten at i forhold til eksempel 2 ble den oppløselige del av inneholdt kobber øket til 66, 7%, av kadmium til 48,9%. Det adskilte residuet inneholdt 90,8% av anvendt jern, det samlede bly og sølv samt 42,2% av svovlet. As in example 2, of the total water-insoluble zinc present, 67.2% was transferred in water-soluble form. The MnC^ addition also caused that, compared to example 2, the soluble part of contained copper was increased to 66.7%, of cadmium to 48.9%. The separated residue contained 90.8% of the iron used, the total lead and silver and 42.2% of the sulphur.
Eksempel 5-Example 5-
900 g uvasket og tørket jernresidu av samme sammensetning som i eksempel 2 ble etter tilsetning av 1950 ml vann behandlet 5 timer ved 300°C og ca. 83 bar i røreverksautoklav. Etter filtrering ble residuet vasket og analysert. 900 g of unwashed and dried iron residue of the same composition as in example 2 was, after adding 1950 ml of water, treated for 5 hours at 300°C and approx. 83 bar in a mixer autoclave. After filtration, the residue was washed and analyzed.
Det inneholdt (angivelser i masse-%):It contained (indications in mass %):
Av verdimetallene var referert til anvendt mengde gått i oppløsning: Of the valuable metals, reference was made to the quantity used that had dissolved:
Eksempel 6. Example 6.
900 g uvasket og tørket jernresidu av samme sammensetning som i eksempel 2 ble under tilsetning av 45 g Mn02og 1950 ml vann behandlet 5 timer ved 300°C og ca. 83 bar i røre-verksautoklav. 900 g of unwashed and dried iron residue of the same composition as in example 2 was treated with the addition of 45 g of Mn02 and 1950 ml of water for 5 hours at 300°C and approx. 83 bar in a mixer autoclave.
Etter filtrering ble residuet vasket, tørket og veid. After filtration, the residue was washed, dried and weighed.
Det inneholdt (angivelser i masse-%):It contained (indications in mass %):
Fra residuvekten på 290 g lar det seg beregne at av de verdifulle metaller (referert til anvendt mengde) gikk følgende mengder i oppløsning: From the residue weight of 290 g, it can be calculated that the following amounts of the valuable metals (referred to the amount used) were dissolved:
Tilsetningen av oksydasjonsmidlet Mn02bevirket i forhold til eksempel 5 ved de angitte metaller en økning av oppløsningen. The addition of the oxidizing agent MnO 2 caused, in relation to example 5, an increase in the dissolution in the specified metals.
Claims (3)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2625771A DE2625771C2 (en) | 1976-06-09 | 1976-06-09 | Process for the processing of iron-containing residues from the roasting blend leaching by pressure digestion with water |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NO771811L true NO771811L (en) | 1977-12-12 |
Family
ID=5980131
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NO771811A NO771811L (en) | 1976-06-09 | 1977-05-24 | PROCEDURES FOR PREPARATION OF IRONOUS RESIDUES FROM THE ZINC ELECTROLYSIS BY PRESSURE CONNECTION WITH WATER |
Country Status (8)
| Country | Link |
|---|---|
| BE (1) | BE855541A (en) |
| DE (1) | DE2625771C2 (en) |
| ES (1) | ES459291A1 (en) |
| FI (1) | FI771648A (en) |
| FR (1) | FR2354387A1 (en) |
| IT (1) | IT1078287B (en) |
| NL (1) | NL7706077A (en) |
| NO (1) | NO771811L (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| MX157259A (en) * | 1980-09-30 | 1988-11-09 | Outokumpu Oy | IMPROVED HYDROMETALLURGICAL METHOD FOR TREATING A RAW MATERIAL CONTAINING OXIDE AND FERRITE OF ZINC, COPPER AND CADMIUM |
| CN114769282B (en) * | 2022-04-07 | 2023-10-27 | 楚雄滇中有色金属有限责任公司 | Harmless treatment method for copper smelting waste acid arsenic precipitation slag |
-
1976
- 1976-06-09 DE DE2625771A patent/DE2625771C2/en not_active Expired
-
1977
- 1977-05-19 IT IT4947777A patent/IT1078287B/en active
- 1977-05-24 NO NO771811A patent/NO771811L/en unknown
- 1977-05-24 FI FI771648A patent/FI771648A/fi not_active Application Discontinuation
- 1977-05-30 ES ES459291A patent/ES459291A1/en not_active Expired
- 1977-06-02 NL NL7706077A patent/NL7706077A/en not_active Application Discontinuation
- 1977-06-06 FR FR7717787A patent/FR2354387A1/en active Granted
- 1977-06-09 BE BE178327A patent/BE855541A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| ES459291A1 (en) | 1978-03-16 |
| FI771648A (en) | 1977-12-10 |
| IT1078287B (en) | 1985-05-08 |
| FR2354387B1 (en) | 1981-02-27 |
| NL7706077A (en) | 1977-12-13 |
| BE855541A (en) | 1977-10-03 |
| DE2625771C2 (en) | 1978-04-20 |
| FR2354387A1 (en) | 1978-01-06 |
| DE2625771B1 (en) | 1977-08-25 |
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