RU2372412C1 - Processing method of cadmium-containing materials - Google Patents
Processing method of cadmium-containing materials Download PDFInfo
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- RU2372412C1 RU2372412C1 RU2008113734A RU2008113734A RU2372412C1 RU 2372412 C1 RU2372412 C1 RU 2372412C1 RU 2008113734 A RU2008113734 A RU 2008113734A RU 2008113734 A RU2008113734 A RU 2008113734A RU 2372412 C1 RU2372412 C1 RU 2372412C1
- Authority
- RU
- Russia
- Prior art keywords
- cadmium
- solution
- leaching
- containing materials
- sedimentation
- Prior art date
Links
- 229910052793 cadmium Inorganic materials 0.000 title claims abstract description 23
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 title claims abstract description 23
- 239000000463 material Substances 0.000 title claims abstract description 4
- 238000003672 processing method Methods 0.000 title abstract 2
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 claims abstract description 12
- 238000002386 leaching Methods 0.000 claims abstract description 10
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229940071106 ethylenediaminetetraacetate Drugs 0.000 claims abstract description 8
- 238000000034 method Methods 0.000 claims abstract description 7
- 239000003513 alkali Substances 0.000 claims abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 claims abstract description 3
- 238000001556 precipitation Methods 0.000 claims description 3
- 238000000605 extraction Methods 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000005272 metallurgy Methods 0.000 abstract description 3
- 238000004062 sedimentation Methods 0.000 abstract 3
- 241000448280 Elates Species 0.000 abstract 1
- 239000000126 substance Substances 0.000 abstract 1
- UEUXEKPTXMALOB-UHFFFAOYSA-J tetrasodium;2-[2-[bis(carboxylatomethyl)amino]ethyl-(carboxylatomethyl)amino]acetate Chemical compound [Na+].[Na+].[Na+].[Na+].[O-]C(=O)CN(CC([O-])=O)CCN(CC([O-])=O)CC([O-])=O UEUXEKPTXMALOB-UHFFFAOYSA-J 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 14
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 7
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 6
- 229910052742 iron Inorganic materials 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 229910021529 ammonia Inorganic materials 0.000 description 3
- CXKCTMHTOKXKQT-UHFFFAOYSA-N cadmium oxide Inorganic materials [Cd]=O CXKCTMHTOKXKQT-UHFFFAOYSA-N 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 241000446313 Lamella Species 0.000 description 2
- WBYRVEAPTWYNOX-UHFFFAOYSA-N [Fe].[Cd] Chemical compound [Fe].[Cd] WBYRVEAPTWYNOX-UHFFFAOYSA-N 0.000 description 2
- 230000002378 acidificating effect Effects 0.000 description 2
- PLLZRTNVEXYBNA-UHFFFAOYSA-L cadmium hydroxide Chemical compound [OH-].[OH-].[Cd+2] PLLZRTNVEXYBNA-UHFFFAOYSA-L 0.000 description 2
- CFEAAQFZALKQPA-UHFFFAOYSA-N cadmium(2+);oxygen(2-) Chemical compound [O-2].[Cd+2] CFEAAQFZALKQPA-UHFFFAOYSA-N 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 239000000706 filtrate Substances 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- FCMHCNHPFKGBPB-UHFFFAOYSA-J 2-[2-[bis(carboxylatomethyl)amino]ethyl-(carboxylatomethyl)amino]acetate cadmium(2+) Chemical compound [Cd++].[Cd++].[O-]C(=O)CN(CCN(CC([O-])=O)CC([O-])=O)CC([O-])=O FCMHCNHPFKGBPB-UHFFFAOYSA-J 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000012670 alkaline solution Substances 0.000 description 1
- OJIJEKBXJYRIBZ-UHFFFAOYSA-N cadmium nickel Chemical compound [Ni].[Cd] OJIJEKBXJYRIBZ-UHFFFAOYSA-N 0.000 description 1
- QCUOBSQYDGUHHT-UHFFFAOYSA-L cadmium sulfate Chemical compound [Cd+2].[O-]S([O-])(=O)=O QCUOBSQYDGUHHT-UHFFFAOYSA-L 0.000 description 1
- 229910000331 cadmium sulfate Inorganic materials 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 238000010668 complexation reaction Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 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
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- Secondary Cells (AREA)
Abstract
Description
Изобретение относится к металлургии, а именно способам получения кадмия, и может быть использовано при переработке набивок положительных ламелей железо-кадмиевых аккумуляторов.The invention relates to metallurgy, and in particular to methods for producing cadmium, and can be used in the processing of packings of positive lamellas of iron-cadmium batteries.
В качестве прототипа выбран способ переработки никель-кадмиевого скрапа (патент RU №2164956), включающий выщелачивание кадмия с последующим его осаждением.As a prototype, a method for processing nickel-cadmium scrap (patent RU No. 2164956), including cadmium leaching with its subsequent deposition, was selected.
Недостатками способа являются недостаточно высокая степень извлечения кадмия и очень высокая степень опасности производства.The disadvantages of the method are not a high degree of cadmium extraction and a very high degree of production hazard.
При выщелачивании кадмия в аммиачной среде происходит образование комплексных катионов [Cd(NH3)4]2+. Железо также образует подобные аммиакаты, хотя и не в значительной степени, следовательно, невозможно обеспечить селективное извлечение кадмия.When cadmium is leached in an ammonia medium, complex cations [Cd (NH 3 ) 4 ] 2+ are formed . Iron also forms such ammonia, although not to a large extent, therefore, it is impossible to provide selective extraction of cadmium.
Применение аммиака ограничено его летучестью, резким едким запахом и ядовитостью паров.The use of ammonia is limited by its volatility, pungent odor and toxic fumes.
Техническими задачами, на решение которых направленно заявленное изобретение, являются повышение степени извлечения кадмия и безопасности производства.Technical problems, the solution of which the claimed invention is directed, are to increase the degree of cadmium extraction and production safety.
Указанные задачи решаются тем, что способ переработки кадмийсодержащих материалов, включающий выщелачивание кадмия с последующим его осаждением, отличается тем, что выщелачивание осуществляют раствором этилендиаминтетраацетата натрия при pH раствора 9,0-9,5. После чего из полученного раствора удаляют этилендиаминтетраацетат в молекулярном виде осаждением его серной кислотой при pH 1,0-1,6, а затем осаждают кадмий в виде гидроксида, добавлением в кадмийсодержащий раствор щелочи до pH раствора более 9,8.These problems are solved in that the method of processing cadmium-containing materials, including leaching of cadmium with its subsequent deposition, is characterized in that the leaching is carried out with a solution of sodium ethylene diamine tetra acetate at a solution pH of 9.0-9.5. After that, ethylene diamine tetraacetate in molecular form is removed from the resulting solution by precipitation with sulfuric acid at a pH of 1.0-1.6, and then cadmium is precipitated in the form of hydroxide by adding alkali to the cadmium-containing solution to a pH of more than 9.8.
Область комплексообразования этилендиаминтетраацетата с железом и кадмием находятся в разных значениях pH среды: кадмия - в щелочной, а железа в кислой. Следовательно, при применении щелочного раствора этилендиаминтетраацетата обеспечивается избирательное растворение оксида кадмия. При этом оксид железа практически в неизменном виде остается в твердой фазе.The complexation region of ethylenediaminetetraacetate with iron and cadmium are in different pH values: cadmium - in alkaline, and iron in acidic. Therefore, when using an alkaline solution of ethylenediaminetetraacetate, selective dissolution of cadmium oxide is provided. In this case, iron oxide remains almost unchanged in the solid phase.
Выбор pH выщелачивания обусловлен устойчивостью кадмиево-этилендиаминтетраацетатного комплекса, максимум которой наблюдается в указанном диапазоне.The choice of leaching pH is due to the stability of the cadmium-ethylenediaminetetraacetate complex, the maximum of which is observed in the indicated range.
В кислой среде при pH раствора 1,0-1,6 этилендиаминтетраацетат приобретает молекулярную кислотную форму, практически не растворимую в воде, что позволяет удалить его полностью.In an acidic environment at a pH of a solution of 1.0-1.6, ethylenediaminetetraacetate takes on a molecular acid form that is practically insoluble in water, which allows it to be completely removed.
При pH раствора менее 1,0 и более 1,6 растворимость этилендиаминтетраацетата увеличивается, поэтому удаление его будет не полным.When the pH of the solution is less than 1.0 and more than 1.6, the solubility of ethylene diamine tetraacetate increases, so its removal will not be complete.
При осаждении кадмия при pH раствора менее 9,8, гидроксид кадмия кристаллизуется не полностью и возможен проскок сульфата кадмия в фильтрат.When cadmium is precipitated at a pH of less than 9.8, cadmium hydroxide does not crystallize completely and cadmium sulfate can slip into the filtrate.
Способ осуществляли следующим способом.The method was carried out in the following way.
ПримерExample
Набивки положительных ламелей железо-кадмиевых аккумуляторов размером частиц класса - 0,1 мм, содержащих CdO - 21,1%, Fe2O3 - 51,7%, графит - остальное, подвергали выщелачиванию в течение 2 часов в растворе Трилона Б (этилендиаминтетраацетата натрия) концентрацией 100-120 г/дм3 при Т:Ж=1:5 при pH раствора 9,0-9,5.Packings of positive lamellas of iron-cadmium batteries with a particle size of 0.1 mm, containing CdO - 21.1%, Fe 2 O 3 - 51.7%, graphite - the rest, were leached for 2 hours in a solution of Trilon B (ethylene diamine tetraacetate sodium) with a concentration of 100-120 g / dm 3 at T: W = 1: 5 at a solution pH of 9.0-9.5.
После фильтрации кек промывали водой, а промводы объединяли с фильтратом.After filtration, the cake was washed with water, and the promoters were combined with the filtrate.
В полученный раствор добавляли серную кислоту до достижения рН раствора 1,0-1,6. При этом получали осадок этилендиаминтетрауксусной кислоты, который отфильтровывали и направляли на приготовление исходного раствора в головную операцию выщелачивания.Sulfuric acid was added to the resulting solution until the solution reached a pH of 1.0-1.6. In this case, a precipitate of ethylenediaminetetraacetic acid was obtained, which was filtered off and sent to prepare the initial solution in the head leaching operation.
После этого кадмийсодержащий раствор нейтрализовали концентрированным раствором NaOH до достижения pH 10-11, при котором осаждается гидроксид кадмия. Полученный осадок промывали водой и прокаливали при температуре 550°С.After that, the cadmium-containing solution was neutralized with a concentrated NaOH solution until a pH of 10-11 was reached, at which cadmium hydroxide precipitated. The resulting precipitate was washed with water and calcined at a temperature of 550 ° C.
При этом получили оксид кадмия, соответствующий требованиям ГОСТ 11120-75.At the same time, cadmium oxide was obtained that meets the requirements of GOST 11120-75.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| RU2008113734A RU2372412C1 (en) | 2008-04-11 | 2008-04-11 | Processing method of cadmium-containing materials |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| RU2008113734A RU2372412C1 (en) | 2008-04-11 | 2008-04-11 | Processing method of cadmium-containing materials |
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| Publication Number | Publication Date |
|---|---|
| RU2372412C1 true RU2372412C1 (en) | 2009-11-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| RU2008113734A RU2372412C1 (en) | 2008-04-11 | 2008-04-11 | Processing method of cadmium-containing materials |
Country Status (1)
| Country | Link |
|---|---|
| RU (1) | RU2372412C1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2469112C1 (en) * | 2011-07-11 | 2012-12-10 | Федеральное государственное автономное образовательное учреждение высшего профессионального образования Уральский федеральный университет им. первого Президента России Б.Н. Ельцина | Method for extracting cadmium from secondary raw material |
| RU2604080C2 (en) * | 2015-01-22 | 2016-12-10 | Общество с ограниченной ответственностью "ДЕВОН" | Method of nickel-cadmium-iron alkaline storage batteries negative electrodes electrode mass processing |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5851490A (en) * | 1995-05-11 | 1998-12-22 | Metals Recycling Technologies Corp. | Method for utilizing PH control in the recovery of metal and chemical values from industrial waste streams |
| SU716304A1 (en) * | 1978-09-20 | 1999-07-27 | Всесоюзный научно-исследовательский горно-металлургический институт цветных металлов "ВНИИЦВЕТМЕТ" | METHOD OF PROCESSING OF COPPER-CADMIUS KEKA |
| RU2164956C1 (en) * | 1999-10-11 | 2001-04-10 | Закрытое акционерное общество "Вторник" | Method of processing nickel-cadmium scrap |
| EP1187224A1 (en) * | 2000-09-11 | 2002-03-13 | ANTEC Solar GmbH | Recycling method for CdTe/CdS thin film solar cell modules |
| JP2006265672A (en) * | 2005-03-25 | 2006-10-05 | Nikko Kinzoku Kk | Method for leaching out cadmium |
| CN1899983A (en) * | 2006-07-22 | 2007-01-24 | 东北电力大学 | Method for treating industrial waste water containing cadmium using waste beer yeast |
| JP2007191782A (en) * | 2005-12-21 | 2007-08-02 | Nikko Kinzoku Kk | Method for producing cadmium |
-
2008
- 2008-04-11 RU RU2008113734A patent/RU2372412C1/en not_active IP Right Cessation
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU716304A1 (en) * | 1978-09-20 | 1999-07-27 | Всесоюзный научно-исследовательский горно-металлургический институт цветных металлов "ВНИИЦВЕТМЕТ" | METHOD OF PROCESSING OF COPPER-CADMIUS KEKA |
| US5851490A (en) * | 1995-05-11 | 1998-12-22 | Metals Recycling Technologies Corp. | Method for utilizing PH control in the recovery of metal and chemical values from industrial waste streams |
| RU2164956C1 (en) * | 1999-10-11 | 2001-04-10 | Закрытое акционерное общество "Вторник" | Method of processing nickel-cadmium scrap |
| EP1187224A1 (en) * | 2000-09-11 | 2002-03-13 | ANTEC Solar GmbH | Recycling method for CdTe/CdS thin film solar cell modules |
| JP2006265672A (en) * | 2005-03-25 | 2006-10-05 | Nikko Kinzoku Kk | Method for leaching out cadmium |
| JP2007191782A (en) * | 2005-12-21 | 2007-08-02 | Nikko Kinzoku Kk | Method for producing cadmium |
| CN1899983A (en) * | 2006-07-22 | 2007-01-24 | 东北电力大学 | Method for treating industrial waste water containing cadmium using waste beer yeast |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2469112C1 (en) * | 2011-07-11 | 2012-12-10 | Федеральное государственное автономное образовательное учреждение высшего профессионального образования Уральский федеральный университет им. первого Президента России Б.Н. Ельцина | Method for extracting cadmium from secondary raw material |
| RU2604080C2 (en) * | 2015-01-22 | 2016-12-10 | Общество с ограниченной ответственностью "ДЕВОН" | Method of nickel-cadmium-iron alkaline storage batteries negative electrodes electrode mass processing |
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Effective date: 20100412 |