CN105331821A - Recycling method for nickel in nickel-cadmium-zinc slag - Google Patents
Recycling method for nickel in nickel-cadmium-zinc slag Download PDFInfo
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- CN105331821A CN105331821A CN201510803599.7A CN201510803599A CN105331821A CN 105331821 A CN105331821 A CN 105331821A CN 201510803599 A CN201510803599 A CN 201510803599A CN 105331821 A CN105331821 A CN 105331821A
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- nickel
- cadmium
- cadmia
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- sodium hydroxide
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- 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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Abstract
The invention discloses a recycling method for nickel in nickel-cadmium-zinc slag, and relates to a comprehensive recycling method for nickel-cadmium-zinc waste residues generated in a waste nickel-cadmium battery recycling and metallurgical process. The recycling method is characterized in that a recycling process for the recycling method comprises the following steps: (1) adding the nickel-cadmium-zinc slag into a sodium hydroxide solution to carry out leaching; (2) washing the obtained leached residues; (3) drying the washed leached residues, then, carrying out reduction smelting for reducing cadmium oxide and nickel oxide in the slag into elementary-substance cadmium and elementary-substance nickel, and recycling volatilized cadmium in dust collecting equipment; and (4) after the reduction is ended, continuously smelting the rest of nickel, and pouring the rest of nickel into a nickel ingot or atomizing the rest of nickel into nickel powder. Compared with a conventional recycling process, the recycling method for nickel in the nickel-cadmium-zinc slag has the advantages of being short in process, complete in nickel-cadmium-zinc separation, high in a nickel recovery rate, and the like.
Description
Technical field
A recovery method for nickel in NI-G cadmia, relates to the synthetical recovery treatment process of the NI-G zinc waste residue that a kind of abandoned nickel and cadmium cell reclaims and metallurgical process produces.
Background technology
Containing NI-G zinc material wide material sources; quantity is comparatively large, and main source has abandoned nickel and cadmium cell, the waste residue that solution of zinc sulfate produces except NI-G; the waste residue that nickel sulfate solution produces except cadmium; main containing NI-G zinc three kinds of metallic elements in slag, some exists with metallic forms, and some exists with metal oxide form; in slag, nickel is worth higher; cadmium toxicity is comparatively large, and no matter from economic worth or environment protection angle, NI-G cadmia all must be recycled.
At present, this recoverying and utilizing method containing NI-G zinc material, mainly contains wet process and firing method process two kinds.The process of wet method is as follows: add sulfuric acid leaching, filters, the nickel obtained, zinc, cadmium mixing solutions, and adopt zinc powder secondary except cadmium, secondary is except the slag again produced during cadmium containing NI-G zinc, and NI-G cadmia circulates in process, causes nickel recovery low, and cadmium pollution is spread; Slag is also first used leaching with sodium hydroxide by part, realize zinc to be separated with NI-G, NI-G slag adopts sulfuric acid leaching, and sodium sulphite is except cadmium, but when there is sulfuric acid leaching, acidity control is high, NI-G is utilized to be separated, but be unfavorable for that the single nickel salt after except cadmium reclaims, when acidity control is low, sulfide removes cadmium can carry a large amount of nickelous sulfides secretly, and the Cadmium Sulfide market of output is less, is worth low.
In patent 200810048182.4, employing adds zinc sulfate roasting, water logging, melting technology, it is long to there is technical process in this technique, the degree of oxidation of nickel, zinc can be increased the weight of during roasting, be unfavorable for later stage smelting reduction, during roasting, simple substance cadmium and simple substance zinc can together volatilize, and again produce zinc cadmium mixing slag, unreacted completely zinc sulfate can be mixed in Cadmium Sulphate when water logging, forms secondary zinc cadmium solution.
Summary of the invention
Object of the present invention is exactly the deficiency existed for above-mentioned prior art, provides one to have flow process short, and NI-G zinc is separated thoroughly, the recovery method of nickel in the NI-G cadmia of nickel recovery advantages of higher.
The object of the invention is following technical scheme realize.
A recovery method for nickel in NI-G cadmia, is characterized in that the step of its removal process comprises:
(1) NI-G cadmia is added sodium hydroxide solution to leach;
(2) leached mud obtained is washed;
(3) by after the leached mud drying after washing, carry out retailoring, the Cadmium oxide in slag, nickel oxide are reduced into simple substance cadmium, elemental nickel, the cadmium removed that volatilizees reclaims in dust collection device;
(4) after reduction terminates, continue the nickel of melting remainder, and water and build up nickel ingot or be atomized into nickel powder.
The recovery method of nickel in a kind of NI-G cadmia of the present invention, is characterized in that NI-G cadmia is added sodium hydroxide solution when leaching by its step (1), and in the sodium hydroxide in its sodium hydroxide solution and NI-G cadmia, the mass ratio of zinc is 1-1.2; The concentration of sodium hydroxide solution is 8-10mol/L, and extraction temperature is 20 ~ 40 DEG C, the time is 15-20h.
The recovery method of nickel in a kind of NI-G cadmia of the present invention, is characterized in that its step (2) leached mud first washs to Zn content in leached mud lower than 0.1% with the sodium hydroxide solution of 1-2mol/L, then is washed with water to pH=7-9.
The recovery method of nickel in a kind of NI-G cadmia of the present invention, it is characterized in that its step (3) is in 800-900 DEG C of melting 3-5h in intermediate frequency furnace, oxygen quality 3-5 charcoal doubly in leached mud is added during melting, Cadmium oxide in slag, nickel oxide are reduced into simple substance cadmium, elemental nickel, and the cadmium removed that volatilizees reclaims in dust collection device.
The recovery method of nickel in a kind of NI-G cadmia of the present invention, is characterized in that its NI-G cadmia is the mixture that NI-G zinc oxide or simple substance are formed.
In a kind of NI-G cadmia of the present invention, the recovery method of nickel, compared with traditional recovery process, has flow process short, and NI-G zinc is separated thoroughly, nickel recovery advantages of higher.
Embodiment
A recovery method for nickel in NI-G cadmia, its concrete operation step comprises: NI-G cadmia is doubly added the sodium hydroxide solution of 8-10mol/L by (1) by zinc quality 1-1.2, at 20 ~ 40 DEG C, leach 15-20h; (2) leached mud first washs to Zn content in leached mud lower than 0.1% with the sodium hydroxide solution of 1-2mol/L; (3) slag after alkali leaching is washed with water to wash water pH=7-9, after drying in intermediate frequency furnace at 800-900 DEG C melting 3-5h, add oxygen quality 3-5 charcoal doubly in leached mud during melting, the Cadmium oxide in slag, nickel oxide are reduced into simple substance cadmium, elemental nickel, cadmium is volatilized and reclaims; (4) remaining nickel continues intensification melting, and waters to build up nickel ingot or be atomized into nickel powder and reclaim.
Embodiment 1
(1) by nickeliferous for 1000g 63.7%, containing cadmium 1.6%, containing the NI-G cadmia of zinc 32.3%, add the sodium hydroxide solution 1.24L of 8mol/L, at 20 DEG C, leach 15h;
(2) the sodium hydroxide solution washing of leached mud 1mol/L contains zinc 0.01% to leached mud, then is washed with water to wash water pH=9;
(3) leached mud 675.2g is obtained, composition is Ni94.31%, Cd2.36%, Zn0.01%, O3.13%, by leached mud in intermediate frequency furnace in 900 DEG C of melting 5h, add 63.4g charcoal during melting, the Cadmium oxide in slag, nickel oxide be reduced into simple substance cadmium, elemental nickel, the cadmium volatilized reclaims in dust collection device, reclaiming cadmium meal component is Ni0.003%, Zn0.001%, Cd99.12%;
(4), after reduction terminates, nickel waters and builds up nickel ingot, obtains nickel ingot 637.2g, and composition is Ni98.99%, Cd0.0078%, Zn0.0047%, and nickel recovery is 99.02%.
Embodiment 2
(1) by nickeliferous for 100kg 56.3%, containing cadmium 3.72%, containing the NI-G cadmia of zinc 38.9%, add the sodium hydroxide solution 144L of 10mol/L, at 40 DEG C, leach 20h;
(2) the sodium hydroxide solution washing of leached mud 2mol/L contains zinc 0.07% to leached mud, then is washed with water to wash water pH=7;
(3) leached mud 60.8kg is obtained, composition is Ni89.47%, Cd6.05%, Zn0.03%, O3.87%, by leached mud in intermediate frequency furnace in 800 DEG C of melting 3h, add 11.8kg charcoal during melting, the Cadmium oxide in slag, nickel oxide be reduced into simple substance cadmium, elemental nickel, the cadmium volatilized reclaims in dust collection device, reclaiming cadmium meal component is Ni0.007%, Zn0.005%, Cd97.72%;
(4), after reduction terminates, nickel is atomized into nickel powder, must be atomized nickel powder 54.1kg, and composition is Ni99.63%, Cd0.037%, Zn0.019%, and nickel recovery is 95.74%.
Embodiment 3
(1) by nickeliferous for 3000g 26.3%, containing cadmium 7.04%, containing the NI-G cadmia of zinc 43.2%, add the sodium hydroxide solution 4L of 9mol/L, at 30 DEG C, leach 17h;
(2) the sodium hydroxide solution washing of leached mud 1.5mol/L contains zinc 0.04% to leached mud, then is washed with water to wash water pH=8;
(3) leached mud 1371.8g is obtained, composition is Ni56.79%, Cd15.19%, Zn0.035%, O27.14%, by leached mud in intermediate frequency furnace in 850 DEG C of melting 4h, add 1489g charcoal during melting, the Cadmium oxide in slag, nickel oxide be reduced into simple substance cadmium, elemental nickel, the cadmium volatilized reclaims in dust collection device, reclaiming cadmium meal component is Ni0.017%, Zn0.002%, Cd98.56%;
(4), after reduction terminates, nickel is atomized into nickel powder, must be atomized nickel powder 785.1g, and composition is Ni99.2%, Cd0.0076%, Zn0.0089%, and nickel recovery is 98.72%.
Claims (5)
1. the recovery method of nickel in NI-G cadmia, is characterized in that the step of its removal process comprises:
(1) NI-G cadmia is added sodium hydroxide solution to leach;
(2) leached mud obtained is washed;
(3) by after the leached mud drying after washing, carry out retailoring, the Cadmium oxide in slag, nickel oxide are reduced into simple substance cadmium, elemental nickel, the cadmium removed that volatilizees reclaims in dust collection device;
(4) after reduction terminates, continue the nickel of melting remainder, and water and build up nickel ingot or be atomized into nickel powder.
2. the recovery method of nickel in a kind of NI-G cadmia according to claim 1, it is characterized in that NI-G cadmia is added sodium hydroxide solution when leaching by its step (1), in the sodium hydroxide in its sodium hydroxide solution and NI-G cadmia, the mass ratio of zinc is 1-1.2; The concentration of sodium hydroxide solution is 8-10mol/L, and extraction temperature is 20 ~ 40 DEG C, the time is 15-20h.
3. the recovery method of nickel in a kind of NI-G cadmia according to claim 1, it is characterized in that its step (2) leached mud first with the sodium hydroxide solution washing of 1-2mol/L to Zn content in leached mud lower than 0.1%, then be washed with water to pH=7-9.
4. the recovery method of nickel in a kind of NI-G cadmia according to claim 1, it is characterized in that its step (3) is in 800-900 DEG C of melting 3-5h in intermediate frequency furnace, oxygen quality 3-5 charcoal doubly in leached mud is added during melting, Cadmium oxide in slag, nickel oxide are reduced into simple substance cadmium, elemental nickel, and the cadmium removed that volatilizees reclaims in dust collection device.
5. the recovery method of nickel in a kind of NI-G cadmia according to claim 1, is characterized in that its NI-G cadmia is the mixture that NI-G zinc oxide or simple substance are formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510803599.7A CN105331821A (en) | 2015-11-20 | 2015-11-20 | Recycling method for nickel in nickel-cadmium-zinc slag |
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| CN201510803599.7A CN105331821A (en) | 2015-11-20 | 2015-11-20 | Recycling method for nickel in nickel-cadmium-zinc slag |
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| CN105331821A true CN105331821A (en) | 2016-02-17 |
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| CN201510803599.7A Pending CN105331821A (en) | 2015-11-20 | 2015-11-20 | Recycling method for nickel in nickel-cadmium-zinc slag |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107475524A (en) * | 2017-09-06 | 2017-12-15 | 长沙科力威蒸馏技术有限公司 | A kind of cadmium alkaline residue processing method |
| CN113957257A (en) * | 2021-10-21 | 2022-01-21 | 重庆万博再生资源利用有限公司 | Method for purifying zinc-containing slag by zinc hydrometallurgy |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101613796A (en) * | 2008-06-24 | 2009-12-30 | 黄石市英柯有色金属有限公司 | A kind of separation method of metal elements of zinc-nickel-cadmium-containing materials |
| CN104141044A (en) * | 2014-07-02 | 2014-11-12 | 西华师范大学 | Method for recycling and refining nickel and cadmium in solid hazardous wastes |
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2015
- 2015-11-20 CN CN201510803599.7A patent/CN105331821A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101613796A (en) * | 2008-06-24 | 2009-12-30 | 黄石市英柯有色金属有限公司 | A kind of separation method of metal elements of zinc-nickel-cadmium-containing materials |
| CN104141044A (en) * | 2014-07-02 | 2014-11-12 | 西华师范大学 | Method for recycling and refining nickel and cadmium in solid hazardous wastes |
Non-Patent Citations (1)
| Title |
|---|
| 钟燕萍等: ""从废弃镍基电池中回收有价金属的研究进展"", 《新技术新工艺》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107475524A (en) * | 2017-09-06 | 2017-12-15 | 长沙科力威蒸馏技术有限公司 | A kind of cadmium alkaline residue processing method |
| CN113957257A (en) * | 2021-10-21 | 2022-01-21 | 重庆万博再生资源利用有限公司 | Method for purifying zinc-containing slag by zinc hydrometallurgy |
| CN113957257B (en) * | 2021-10-21 | 2023-09-01 | 重庆万博再生资源利用有限公司 | Method for purifying zinc-containing slag by zinc hydrometallurgy |
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Application publication date: 20160217 |