FI124262B - Process for the recovery of metals - Google Patents
Process for the recovery of metals Download PDFInfo
- Publication number
- FI124262B FI124262B FI20120381A FI20120381A FI124262B FI 124262 B FI124262 B FI 124262B FI 20120381 A FI20120381 A FI 20120381A FI 20120381 A FI20120381 A FI 20120381A FI 124262 B FI124262 B FI 124262B
- Authority
- FI
- Finland
- Prior art keywords
- metals
- metal
- liquid
- precipitation
- process according
- Prior art date
Links
- 229910052751 metal Inorganic materials 0.000 title claims description 57
- 239000002184 metal Substances 0.000 title claims description 57
- 150000002739 metals Chemical class 0.000 title claims description 33
- 238000000034 method Methods 0.000 title claims description 30
- 238000011084 recovery Methods 0.000 title claims description 5
- 238000001556 precipitation Methods 0.000 claims description 17
- 239000002244 precipitate Substances 0.000 claims description 16
- 239000007788 liquid Substances 0.000 claims description 12
- 150000001639 boron compounds Chemical class 0.000 claims description 9
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 claims description 6
- 239000004327 boric acid Substances 0.000 claims description 5
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 229910052759 nickel Inorganic materials 0.000 claims description 4
- 150000001642 boronic acid derivatives Chemical class 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 2
- 229910052749 magnesium Inorganic materials 0.000 claims description 2
- 229910052748 manganese Inorganic materials 0.000 claims description 2
- 238000000926 separation method Methods 0.000 claims description 2
- 239000002351 wastewater Substances 0.000 claims description 2
- 229910052725 zinc Inorganic materials 0.000 claims description 2
- 239000012716 precipitator Substances 0.000 claims 1
- 239000007787 solid Substances 0.000 description 10
- 239000000126 substance Substances 0.000 description 10
- 239000000243 solution Substances 0.000 description 8
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 6
- 229910052796 boron Inorganic materials 0.000 description 6
- 230000001376 precipitating effect Effects 0.000 description 6
- 235000010338 boric acid Nutrition 0.000 description 5
- 150000003839 salts Chemical class 0.000 description 5
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 3
- 229910021538 borax Inorganic materials 0.000 description 3
- 150000001768 cations Chemical class 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 150000004679 hydroxides Chemical class 0.000 description 3
- -1 oxo anion Chemical class 0.000 description 3
- 238000000746 purification Methods 0.000 description 3
- 239000004328 sodium tetraborate Substances 0.000 description 3
- 235000010339 sodium tetraborate Nutrition 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- BTBUEUYNUDRHOZ-UHFFFAOYSA-N Borate Chemical group [O-]B([O-])[O-] BTBUEUYNUDRHOZ-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 2
- 238000005342 ion exchange Methods 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 229910000000 metal hydroxide Inorganic materials 0.000 description 2
- 150000004692 metal hydroxides Chemical class 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000003914 acid mine drainage Methods 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 150000001450 anions Chemical class 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 125000005619 boric acid group Chemical class 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
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 150000002440 hydroxy compounds Chemical class 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 238000002372 labelling Methods 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- JZMJDSHXVKJFKW-UHFFFAOYSA-M methyl sulfate(1-) Chemical compound COS([O-])(=O)=O JZMJDSHXVKJFKW-UHFFFAOYSA-M 0.000 description 1
- 229910052938 sodium sulfate Inorganic materials 0.000 description 1
- 235000011152 sodium sulphate Nutrition 0.000 description 1
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 1
- 229910021653 sulphate ion Inorganic materials 0.000 description 1
- 235000011149 sulphuric acid Nutrition 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/58—Treatment of water, waste water, or sewage by removing specified dissolved compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/58—Treatment of water, waste water, or sewage by removing specified dissolved compounds
- C02F1/62—Heavy metal compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/58—Treatment of water, waste water, or sewage by removing specified dissolved compounds
- C02F1/62—Heavy metal compounds
- C02F1/64—Heavy metal compounds of iron or manganese
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Removal Of Specific Substances (AREA)
- Manufacture And Refinement Of Metals (AREA)
Description
Menetelmä metallien talteenottamiseksiMethod for recovering metals
Keksintö kohdistuu oheisen patenttivaatimuksen 1 johdanto-osassa esitettyyn menetelmään metallien talteenottamiseksi.The invention relates to a method for recovering metals as set forth in the preamble of claim 1.
55
Monet prosessit synnyttävät nesteitä, joissa metallit ovat liuenneessa muodossa. Tällaisia prosesseja ovat monenlaiset prosessit, joissa käsitellään kiinteässä olomuodossa olevia metalleja tai metallipitoisia kiinteitä aineita. Tuloksena on usein jätteiksi luokiteltavia nestemäisiä aineita, joissa metallit 10 ovat liuenneina, esimerkiksi jonkun suolan muodossa. Tarkoituksella suoritettujen käsittelyprosessien lisäksi tällaisia jätteitä voi syntyä metallien tai metallipitoisten aineiden joutuessa muuten kosketuksiin nesteiden kanssa.Many processes generate liquids in which metals are in dissolved form. Such processes include a variety of processes involving the treatment of solid state metals or metallic solids. The result is often liquid substances classified as waste in which the metals 10 are dissolved, for example in the form of a salt. In addition to purposeful treatment processes, such wastes may be generated when metals or metallic substances are otherwise in contact with liquids.
Tällaisten nesteiden puhdistusta metalleista, joista monet (esimerkiksi 15 raskasmetallit) ovat terveydelle tai ympäristölle haitallisia, vaikeuttaa niiden pieni pitoisuus tai muut liuoksessa läsnäolevat aineet. On esimerkiksi käytetty ioninvaihtoa, joissa haitallinen metalli kationi vaihdetaan harmittomaan kationiin. Tällaiset ioninvaihtosovellukset ovat kuitenkin kalliita.Purification of such fluids from metals, many of which (for example, heavy metals) are harmful to health or the environment, is hampered by their low concentration or other substances present in the solution. For example, ion exchange has been used in which the harmful metal cation is replaced by a harmless cation. However, such ion exchange applications are expensive.
20 Lisäksi tunnetaan menetelmiä, joissa liuennut metalli saostetaan liuoksesta sopivalla kemikaalilla, joka sisältää anionia, joka muodostaa kyseisen metalli-kationin kanssa liukenemattoman suolan. Vesienpuhdistuksessa tunnetaan monia sasotuskemikaaleja, jotka perustuvat esimerkiksi hydroksideihin, jotka saostavat metalleja liukenemattomina hydroksideina. Näiden toimivuus on 25 kuitenkin riippuvainen muista olosuhteista, kuten veden sisältämistä muista ” aineista ja esimerkiksi pH.sta.In addition, methods are known for precipitating a dissolved metal from a solution with a suitable chemical containing an anion which forms an insoluble salt with the metal cation. In water purification, many crosslinking chemicals are known, for example based on hydroxides, which precipitate metals as insoluble hydroxides. However, their functionality is dependent on other conditions such as other substances in the water and pH, for example.
CvJCVJ
C\JC \ J
7 Esimerkiksi US-patentista US-5443619 tunnetaan menetelmä, jossa c\] käytetään saostuskemikaalina kalsiumhydroksidia tai kalsiumoksidia eri pH- 30 arvoissa saostuvien metallien saostamiseksi peräkkäin ja arvokkaiden metallien talteenottamiseksi. Vastaava peräkkäinsaostusmenetelmä on c8 esitetty US-patenttihakemuksessa julkaisunumero US-2011/233139, jossa o käsitellään kaivosten happamia valumavesiä (acid mine drainage). ° Ongelmana saostusmenetelmissä on se, että ne tavallaan synnyttävät uusia 35 jätteitä sellaisten saostumien tai liuenneiden suolojen muodossa, jotka ovat hankalasti erotettavissa tai joilla ei ole jatkokäyttöä.7 For example, a process is known from U.S. Pat. No. 5,434,619, wherein calcium hydroxide or calcium oxide is used as a precipitating chemical for sequential precipitation of metals precipitating at various pH values and for the recovery of valuable metals. A corresponding sequential precipitation process is disclosed in U.S. Patent Application Publication No. US-2011/233139, c8, which deals with acid mine drainage. The problem with precipitation methods is that they in a way generate new waste in the form of precipitates or dissolved salts which are difficult to separate or have no further use.
22
Keksinnön tarkoituksena on poistaa edellä mainitut epäkohdat ja esittää liukoisessa muodossa olevien metallien talteenottomenetelmä, jolla ei ole em. epäkohtia ja joka on yksinkertaisesti ja huokeasti toteutettavissa. Tämän tarkoituksen toteuttamiseksi keksinnön mukaiselle menetelmälle on 5 pääasiassa tunnusomaista se, mikä on esitetty oheisen patenttivaatimuksen 1 tunnusmerkkiosassa.The object of the invention is to eliminate the aforementioned drawbacks and to provide a process for the recovery of metals in soluble form which is free of the above drawbacks and which is simple and inexpensive to implement. To accomplish this purpose, the method according to the invention is essentially characterized in what is set forth in the characterizing part of the attached claim 1.
Keksinnölle on ominaista, että metallien saostukseen käytetään hydroksidia yhdessä booriyhdisteen kanssa. Booriyhdiste voi olla jotakin sopivaa boorin 10 hydroksoyhdistettä tai booria oksoanionina sisältävää yhdistettä. Edellisestä on esimerkkinä boorin hapot (happihapot), erityisesti boorihappo H3BO3. Jälkimmäisestä esimerkkinä ovat boraattisuolat, erityisesti booraksi. Boorihappo H3BO3 on tavallisin boorin happo ja hinnaltaan huokea saostuskemikaali, joka pystyy muodostamaan niukkaliukoisia saostumia 15 metallihydroksidien kanssa. Booraksi on puolestaan yleinen boorin esiintymismuoto, joka toimii samalla tavalla. Myöhemmät olosuhteiden muutokset, kuten pH.n muutokset, eivät myöskään pääse vaikuttamaan saostumaan, koska metallihydroksidit muodostavat booriyhdisteiden kanssa hyvin pysyviä sakkoja, joita pitävät yhdessä OH-ryhmät. Tietyille booriyhdisteille, joissa 20 boori on happeen sitoutuneena, on taipumus ketjuuntua tai verkkoontua juuri hydroksiryhmien muodostamien vetysidosten ansiosta. Saostuma on boraatti, johon erotettava metalli on sitoutunut.It is a characteristic of the invention that hydroxide is used together with a boron compound to precipitate metals. The boron compound may be any suitable hydroxy compound of boron or a compound containing boron as an oxo anion. The foregoing is exemplified by boric acids (oxygenates), in particular boric acid H3BO3. An example of the latter is borate salts, especially borax. Boric acid H3BO3 is the most common boron acid and low cost precipitating chemical capable of forming sparingly soluble precipitates with metal hydroxides. Borax, on the other hand, is a common form of boron that functions in the same way. Subsequent changes in conditions, such as changes in pH, also have no effect on the precipitation, since the metal hydroxides, together with the boron compounds, form very stable precipitates which are held together by OH groups. Certain boron compounds in which the boron is attached to oxygen have a tendency to be chain-linked or cross-linked precisely because of hydrogen bonds formed by hydroxy groups. The precipitate is borate to which the metal to be separated is bound.
Menetelmää voidaan käyttää metallien talteenottamiseksi tarkoituksena sitoa 25 liukoisessa muodossa (ioneina) olevat metallit pysyvästi kiinteään muotoon t? loppusijoitusta varten, tai niiden jatkohyödyntämistä varten. Liuos, josta ^ liuennut metalli otetaan talteen booriyhdistettä lisäämällä suoritettuaThe method can be used to recover metals for the purpose of permanently bonding metals in soluble form (ions) to a solid form t? for final disposal, or for their further utilization. The solution from which the dissolved metal is recovered by addition of boron compound
C\JC \ J
7 saostusta hyväksikäyttäen, voi olla vesiliuosta, johon metalli on liuennut ci ioniksi joissakin olosuhteissa. Se voi olla metallin tai metallipitoisen g 30 materiaalin käsittelyssä syntynyttä jätevettä, muissa olosuhteissa metalleita7 precipitation, there may be an aqueous solution in which the metal has dissolved into ci ion under certain conditions. It may be effluent from the processing of metal or metal-containing g 30 material, otherwise metals
CLCL
itseensä kerännyttä vettä, tai metallien liuotusprosesissa tarkoituksella c8 synnytettyä prosessivettä, josta metalli halutaan talteen, owater collected in it, or process water deliberately generated in the metal leaching process from which the metal is to be recovered, o
CUCU
° Erotettaessa liuoksista arvokkaita metalleja, esimerkiksi nikkeliä, kuparia tai 35 kobolttia, voidaan metalli ottaa myöhemmin talteen saostuksessa syntyneestä boraattiyhdisteestä. Booriyhdisteellä suoritetulla saostusmenetelmällä 3 voidaan korvata jopa sulfidisaostus, jota käytetään kaivosteollisuudessa malmeista uuttamalla saadun metallisulfaatin saostuksessa jatkojalostusta varten. Vaikeasti käsiteltävä rikkivety, jota on normaalisi käytetty, voidaan korvata helpommin ja turvallisemmin käsiteltävillä booriyhdisteillä.° When separating valuable metals such as nickel, copper or 35 cobalt from the solutions, the metal can be recovered later from the borate compound formed by precipitation. The boron compound precipitation method 3 can even replace the sulfide precipitation used in the mining industry for the precipitation of metal sulphate from ore extraction for further processing. Hydrogen sulphide, which is difficult to handle and normally used, can be replaced by boron compounds which are easier and safer to handle.
55
Seuraavassa esitetään esimerkinomaisesti reaktioyhtälö, joka kuvaa sulfaatteina liuenneiden metallien saostusta hydroksidin ja boorihapon avulla.The reaction equation which illustrates the precipitation of metals dissolved in sulphates with hydroxide and boric acid is exemplified below.
MeS04 + 2NaOH + 4H3B03 -> [Me(OH)2 + Na2(B407)*5H20] + H2S04 10MeSO4 + 2NaOH + 4H3BO3 -> [Me (OH) 2 + Na2 (B407) * 5H2O] + H2SO4
Pysyvän saostuman muodostava aineet on merkitty hakasulkeisiin. Saostumasta jäljelle jäänyt liuos sisältää rikkihappoa, jolla on monta käyttöä. Sitä voidaan esimerkiksi kierrättää metallien liuottamiseen happamissa olosuhteissa.Substances that form a permanent precipitate are enclosed in square brackets. The solution remaining in the precipitate contains sulfuric acid, which has many uses. For example, it can be recycled to dissolve metals under acidic conditions.
1515
Kaavaa ei tule käsittää ainoaksi mahdolliseksi, koska boraatit ovat hyvin monipuolinen ryhmä suoloja ja ne voivat esiintyä esim. eri boorin ja hapen suhteilla ja sitoutuneen veden määrillä, minkä lisäksi yhdisteiden merkintätavat vaihtelevat. Oleellista on, että poistettava metalli on sitoutunut 20 boraattiin.The formula should not be construed as the only one possible, since borates are a very diverse group of salts and may exist, for example, in different ratios of boron to oxygen and the amount of bound water, and the labeling methods of the compounds vary. It is essential that the metal to be removed is bound to 20 borates.
”Me” voi olla joku kahdenarvoinen metalli (kahdenarvoisen metalli-ionin muodostava metalli), kuten esimerkiksi Cu, Fe, Ni, Co, Mn, Mg tai Zn."Me" may be any divalent metal (metal forming a divalent metal ion) such as Cu, Fe, Ni, Co, Mn, Mg or Zn.
25 Erityisesti kun Me on Cu, Ni tai Co, menetelmää voidaan käyttää liuenneiden t? arvokkaiden metallien talteenotossa kaivosteollisuuden prosessi- ja ^ jätevesistä tarkoituksena erottaa metalli saostumasta myöhemmin.Particularly when Me is Cu, Ni, or Co, the method can be used to dissolve t? in the recovery of valuable metals from process and waste water from the mining industry with a view to separating the metal from the precipitate at a later stage.
C\JC \ J
i cj Boorihapon sijasta voidaan saostuksessa käyttää booraksia, jota tarvitaan ^ 30 kuitenkin noin nelinkertainen määrä. Samoin hydroksidi voi olla muutakinInstead of boric acid, borax may be used for the precipitation, but the amount required is about 30 times. Likewise, the hydroxide may be other
CLCL
kuin natriumhydroksidia, koska tärkeää on vain hydroksidi-ionien tuominen " liuokseen, o C\1 S Saostus voidaan suorittaa säiliöissä tai laajemmissa altaissa (esim. erilaiset 35 jäte- ja varastoaltaat), joihin hydroksidi ja booriyhdiste lisätään. Saostuman 4 erottamiseen jäljelle jääneestä liuoksesta (supernatantista) voidaan käyttää normaaleja mekaanisia erotusmenetelmiä.rather than sodium hydroxide, since only the introduction of hydroxide ions into the solution is important; supernatant), standard mechanical separation methods may be used.
Jos menetelmällä halutaan erotella eri metalleja, voidaan käyttää hyväksi eri 5 metallien saostumista hydroksideina eri pH-arvoissa, kuten aikaisemmin on tunnettua. Kun hydroksidilla on päästy tiettyyn pH-arvoon, jossa metalli saostuu, syntynyt saostuma voidaan erottaa, ja jäljelle jääneeseen liuokseen, mahdollisten välipuhdistustoimenpiteiden jälkeen, aletaan lisätä uudestaan hydroksidia, jolla päästään seuraavan metallin saostuspisteeseen (pH-10 arvoon). Erona aikaisempiin menetelmiin on luonnollisesti se, että saostuksessa käytetään myös booriyhdistettä. Vaihtoehtoisesti kahta tai useampaa metallia voidaan saostaa kerralla samana saostumana, ja metallit voidaan erotella toisistaan jatkokäsittelyvaiheissa.If the process is to separate different metals, the precipitation of different metals as hydroxides at different pH values can be utilized, as is known in the art. Once the hydroxide has reached a certain pH at which the metal precipitates, the precipitate formed can be separated and, after any intermediate purification steps, the remaining solution is re-introduced to reach the next metal precipitation point (pH-10). The difference with the previous processes is, of course, that the boron compound is also used in the precipitation. Alternatively, two or more metals may be precipitated at once in the same precipitate, and the metals may be separated from each other in further processing steps.
15 Menetelmää voidaan käyttää myös muiden metallien, esimerkiksi muiden kahdenarvoisten tai yhdenarvoisten, tai myös kolmenarvoisten metallien talteenottamiseksi niin, että ne eivät jää luokseen. Sitä voidaan käyttää esim. natriumsulfaatin sitomiseen vedestä.The method can also be used to recover other metals, such as other divalent or monovalent or trivalent metals, so that they are not trapped. It can be used, for example, to bind sodium sulfate from water.
20 Keksintöä voidaan käyttää myös likaantuneiden kiiintoainesten puhdistukseen, esimerkiksi liettämällä kiintoainesta veteen, johon kiintoaineksessa olevat liukoiset metallisuolat tällöin liukenevat, ja ne voidaan poistaa em. saostuskemikaaleja lisäämällä. Metallit voidaan tämän jälkeen poistaa liuoksesta kuten edellä on esitetty. Vaihtoehtoisesti voidaan saostuskemi-25 kaalit sekoittaa suoraan kiintoaineksen joukkoon, ja jättää kiintoaineksessa ” liuenneessa muodossa olleesta metallista muodostunut boraattisaostuma o ™ kiintoaineksen sekaan, koska metallia ei enää liukene.The invention can also be used to purify contaminated solids, for example by slurrying the solids in water, whereupon the soluble metal salts in the solids are then dissolved, and can be removed by addition of the aforementioned precipitating chemicals. The metals can then be removed from the solution as described above. Alternatively, the precipitating chemicals can be directly mixed with the solids, and the borate precipitate of the metal dissolved in the solids in the solids can be left in the solids as the metal is no longer soluble.
C\JC \ J
cu Keksintöä ei ole rajoitettu edellä esitettyihin esimerkkeihin, vaan sitä voidaan g 30 muunnella patenttivaatimusten esittämän keksintöajatuksen puitteissa jacu The invention is not limited to the above examples, but can be modified within the scope of the claimed invention and
CLCL
käyttää myös kohteissa, joita ei ole edellä mainittu, cöcan also be used for items not mentioned above, cö
COC/O
oo
CUCU
δδ
CUCU
Claims (6)
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FI20120381A FI124262B (en) | 2012-11-16 | 2012-11-16 | Process for the recovery of metals |
| PCT/FI2013/051079 WO2014076375A1 (en) | 2012-11-16 | 2013-11-18 | Method for recovery of metals |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FI20120381A FI124262B (en) | 2012-11-16 | 2012-11-16 | Process for the recovery of metals |
| FI20120381 | 2012-11-16 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FI20120381A FI20120381A (en) | 2014-05-17 |
| FI124262B true FI124262B (en) | 2014-05-30 |
Family
ID=50730645
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FI20120381A FI124262B (en) | 2012-11-16 | 2012-11-16 | Process for the recovery of metals |
Country Status (2)
| Country | Link |
|---|---|
| FI (1) | FI124262B (en) |
| WO (1) | WO2014076375A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI126049B (en) * | 2013-09-12 | 2016-06-15 | Global Ecoprocess Services Oy | Method for treating metals |
| CN105198125A (en) * | 2015-10-28 | 2015-12-30 | 武汉钢铁(集团)公司 | Method for treating hexavalent chromium ions in industrial wastewater |
| FI127281B (en) * | 2016-03-11 | 2018-02-28 | Global Ecoprocess Services Oy | Method of separating metals |
| CN108658284A (en) * | 2017-03-31 | 2018-10-16 | 上海梅山钢铁股份有限公司 | The method of cold rolling chromate waste water advanced treating |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS49104100A (en) * | 1973-02-12 | 1974-10-02 | ||
| JP3608069B2 (en) * | 1997-08-01 | 2005-01-05 | 月島機械株式会社 | Incineration ash treatment method |
| JPH1199370A (en) * | 1997-09-29 | 1999-04-13 | Nippon Kayaku Co Ltd | Treating agent for heavy metal-containing waste and stabilizing method of heavy metal-containing waste |
| US7419604B1 (en) * | 2004-12-29 | 2008-09-02 | University Of Kentucky Research Foundation | Use of boron compounds to precipitate uranium from water |
-
2012
- 2012-11-16 FI FI20120381A patent/FI124262B/en active IP Right Grant
-
2013
- 2013-11-18 WO PCT/FI2013/051079 patent/WO2014076375A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| FI20120381A (en) | 2014-05-17 |
| WO2014076375A1 (en) | 2014-05-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| López et al. | Recovery of sulphuric acid and added value metals (Zn, Cu and rare earths) from acidic mine waters using nanofiltration membranes | |
| López et al. | Integration of membrane technologies to enhance the sustainability in the treatment of metal-containing acidic liquid wastes. An overview | |
| Balintova et al. | Study of pH influence on selective precipitation of heavy metals from acid mine drainage | |
| López et al. | Integration of nanofiltration membranes in recovery options of rare earth elements from acidic mine waters | |
| FI124262B (en) | Process for the recovery of metals | |
| López et al. | Evaluation of an extreme acid-resistant sulphonamide based nanofiltration membrane for the valorisation of copper acidic effluents | |
| JP2017160543A (en) | Method for recovering precious metals and copper from leach solutions | |
| CN101580317A (en) | Nickel-containing wastewater treatment technology | |
| EP3129515A1 (en) | Depression of copper and iron sulfides in molybdenite flotation circuits | |
| López et al. | From nanofiltration membrane permeances to design projections for the remediation and valorisation of acid mine waters | |
| Hermassi et al. | Impact of functional group types in ion exchange resins on rare earth element recovery from treated acid mine waters | |
| CN108191132A (en) | The recovery method of heavy metal in a kind of high villaumite acid waste water | |
| US9555362B2 (en) | Method for separating arsenic and heavy metals in an acidic washing solution | |
| Itankar et al. | Assessing physicochemical technologies for removing hexavalent chromium from contaminated waters—An overview and future research directions | |
| Ardau et al. | Antimony removal from aqueous solutions by the use of Zn-Al sulphate Layered Double Hydroxide | |
| US20150345024A1 (en) | Method for regenerating plating solution | |
| CN103864254B (en) | The method of the deleading zinc process of steel cable acid washing phosphorization acid waste liquid and comprehensive utilization | |
| CN104030510A (en) | Method for recycling acid and heavy metal in gold smelting acid wastewater | |
| RU2506331C1 (en) | Method for obtaining ammonium tungstate | |
| MX349312B (en) | Method for recovering technical-grade molybdenum from diluted acid leaching solutions (pls) that have a high arsenic concentration and originate from metallurgical waste. | |
| Anagnostopoulos et al. | Residues of industrial wastewater treatment: Hazardous waste or anthropogenic resource? | |
| AU2016228173A1 (en) | Method for recovering cyanide from a barren solution | |
| WO2014061037A1 (en) | Treatment of hazardous solid waste generated in copper manufacturing process | |
| RU2465215C2 (en) | Method of purifying acidic multicomponent drainage solutions from copper and concomitant ions of toxic metals | |
| Dittrich et al. | Phosphorus recovery from sewage sludge ash by a wet-chemical process |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PC | Transfer of assignment of patent |
Owner name: GLOBAL ECOPROCESS SERVICES OY |
|
| FG | Patent granted |
Ref document number: 124262 Country of ref document: FI Kind code of ref document: B |