CN110747353B - Method for treating nickel deposition solution - Google Patents
Method for treating nickel deposition solution Download PDFInfo
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- CN110747353B CN110747353B CN201911031448.9A CN201911031448A CN110747353B CN 110747353 B CN110747353 B CN 110747353B CN 201911031448 A CN201911031448 A CN 201911031448A CN 110747353 B CN110747353 B CN 110747353B
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- 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
- C22B23/00—Obtaining nickel or cobalt
- C22B23/04—Obtaining nickel or cobalt by wet processes
- C22B23/0453—Treatment or purification of solutions, e.g. obtained by leaching
- C22B23/0461—Treatment or purification of solutions, e.g. obtained by leaching by chemical methods
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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
Abstract
The invention discloses a method for treating a nickel precipitation solution, which comprises the following steps: (1) mixing the nickel precipitation solution with lime cream for precipitation so as to obtain a liquid-solid mixture; (2) carrying out thickening treatment on the liquid-solid mixture so as to obtain overflow containing nickel hydroxide precipitate and underflow containing calcium sulfate; (3) the overflow of the nickel hydroxide containing precipitate is filtered to obtain nickel hydroxide and a filtrate. The method adopts lime milk as a precipitator, simplifies the prior nickel precipitation process, saves the production cost of not less than 2000 yuan per ton of nickel compared with the prior nickel precipitation technology, simultaneously enables the direct recovery rate of nickel to reach 96 percent, has obvious effect, can treat the nickel at large flow, and is suitable for industrial production application.
Description
Technical Field
The invention belongs to the technical field of hydrometallurgy, and particularly relates to a method for treating a nickel precipitation solution.
Background
The main treatment process of the low-grade nickel laterite ore in Indonesia and Philippine is to prepare nickel hydroxide after wet leaching, and in the process of preparing the nickel hydroxide, adopted precipitants are mainly magnesium oxide and sodium hydroxide, the cost of the precipitants is high, sodium and magnesium are accumulated after long-term operation, the influence on a system is caused, further, the magnesium is precipitated by lime or sodium is discharged through evaporation, the process flow is long, and the cost is high. Specifically, for example, sodium hydroxide is used as a precipitating agent to react with a nickel sulfate solution to prepare a nickel hydroxide product, a flocculating agent is added to improve the sedimentation performance of the nickel hydroxide, and the nickel hydroxide product is obtained through concentration and filtration. In the process, the sodium content of the system is high due to the fact that the sodium hydroxide is used as a precipitator for precipitating nickel, the system is influenced after long-term operation, therefore, evaporation is needed for discharging the sodium, the price of the sodium hydroxide precipitator is high, and meanwhile, a flocculating agent needs to be added in subsequent concentration, so that the operation cost is high. Other separation methods, such as cyclone separation, are limited by separation principles and equipment structures, cannot process large flows, and are limited in application.
Therefore, the existing technology for processing the nickel deposition solution needs to be further improved.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. To this end, it is an object of the invention to provide a method for treating a nickel-precipitating solution. The method adopts lime milk as a precipitator, simplifies the prior nickel precipitation process, saves the production cost of not less than 2000 yuan per ton of nickel compared with the prior nickel precipitation technology, simultaneously enables the direct recovery rate of nickel to reach 96 percent, has obvious effect, can treat the nickel at large flow, and is suitable for industrial production application.
In one aspect of the invention, the invention provides a method of treating a nickel deposition solution containing nickel sulphate, the method comprising, in accordance with an embodiment of the invention:
(1) mixing the nickel precipitation solution with lime cream for precipitation so as to obtain a liquid-solid mixture;
(2) carrying out thickening treatment on the liquid-solid mixture so as to obtain overflow containing nickel hydroxide precipitate and underflow containing calcium sulfate;
(3) the overflow of the nickel hydroxide containing precipitate is filtered to obtain nickel hydroxide and a filtrate.
According to the method for treating the nickel precipitation solution, the nickel precipitation solution is mixed with the lime cream, nickel sulfate in the nickel precipitation solution can react with calcium hydroxide in the lime cream to generate calcium sulfate and nickel hydroxide, both the calcium sulfate and the nickel hydroxide are solid precipitates, and the lime cream is used as a precipitator, so that the cost is low, and the operation of subsequent processes cannot be influenced; the liquid-solid mixture containing the calcium sulfate precipitate and the nickel hydroxide precipitate is subjected to thickening treatment, so that the calcium sulfate precipitate and the nickel hydroxide precipitate have very small particles, but the calcium sulfate exists in a crystal form, and the nickel hydroxide is in a flocculent state, the sedimentation velocity of the nickel hydroxide and the nickel hydroxide is different, the sedimentation velocity of the calcium sulfate is higher than that of the nickel hydroxide, the nickel hydroxide precipitate and the calcium sulfate precipitate can be separated after the thickening treatment, namely the nickel hydroxide and the calcium sulfate can be separated by adopting the thickening treatment without adding a flocculating agent, and the cost for producing the nickel hydroxide is further reduced. Therefore, the method adopts lime milk as a precipitator, simplifies the prior nickel precipitation process, saves the production cost of not less than 2000 yuan per ton of nickel compared with the prior nickel precipitation technology, simultaneously enables the direct recovery rate of nickel to reach 96 percent, has obvious effect, can treat the nickel at a large flow rate, and is suitable for industrial production application.
In addition, the method for treating the nickel deposition solution according to the above embodiment of the present invention may further have the following additional technical features:
in some embodiments of the invention, the nickel precipitation solution is obtained by leaching a nickel-containing material with sulfuric acid.
In some embodiments of the invention, in the step (1), the content of nickel in the nickel precipitation solution is 1-20g/L, and the content of calcium oxide in the milk lime is 10-40 g/L.
In some embodiments of the invention, in step (1), the molar ratio of nickel in the nickel precipitation solution to calcium oxide in the milk of lime is 0.8-1.2: 1.
in some embodiments of the invention, in step (2), the densification process comprises a multi-stage densification process.
In some embodiments of the present invention, in step (2), the thickening treatment comprises a two-stage thickening treatment: (2-1) subjecting the liquid-solid mixture to a first-stage thickening treatment to obtain a first underflow and an overflow of a first nickel hydroxide-containing precipitate; (2-2) subjecting the first underflow to a secondary thickening treatment so as to obtain the underflow containing calcium sulphate and an overflow containing a second nickel hydroxide precipitate; the overflow stream comprising the nickel hydroxide precipitate includes an overflow stream of the first nickel hydroxide precipitate and an overflow stream of the second nickel hydroxide precipitate.
In some embodiments of the invention, in step (3), the nickel hydroxide has a nickel content of not less than 35 wt% and a calcium content of not more than 6 wt%.
In some embodiments of the invention, in step (3), the filtrate has a nickel content of no greater than 5 ppm.
In some embodiments of the invention, at least a portion of the filtrate from step (3) is returned to step (1).
In some embodiments of the present invention, the method for treating a nickel deposition solution further comprises: (4) and (3) pickling the underflow containing the calcium sulfate, and filtering to obtain pickled liquid and the calcium sulfate.
In some embodiments of the present invention, the method for treating a nickel deposition solution further comprises: returning at least a portion of the calcium sulfate to step (1).
In the method for treating the nickel precipitation solution, in the step (4), the calcium content in the calcium sulfate is not less than 25 wt%, and the nickel content is not more than 0.05 wt%.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic flow diagram of a method of treating a nickel deposition solution according to one embodiment of the present invention;
FIG. 2 is a schematic flow diagram of a method of treating a nickel deposition solution according to yet another embodiment of the present invention;
FIG. 3 is a schematic flow diagram of a method of treating a nickel deposition solution according to yet another embodiment of the present invention;
FIG. 4 is a schematic flow diagram of a method of treating a nickel deposition solution according to yet another embodiment of the present invention;
fig. 5 is a schematic flow diagram of a method of treating a nickel deposition solution according to yet another embodiment of the invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In one aspect of the invention, the invention provides a method of treating a nickel deposition solution, the nickel deposition solution comprising nickel sulphate, the method comprising, in accordance with an embodiment of the invention, with reference to figure 1:
s100: mixing the nickel precipitation solution with lime milk for precipitation
In the step, the nickel precipitation solution is mixed with lime milk for precipitation so as to obtain a liquid-solid mixture. The inventor finds that nickel sulfate in the nickel precipitation solution can react with calcium hydroxide in lime milk to generate calcium sulfate and nickel hydroxide by mixing the nickel precipitation solution with the lime milk, the calcium sulfate and the nickel hydroxide are solid precipitates, and the lime milk is used as a precipitator, so that the cost is low, and the operation of the subsequent process is not influenced. Compared with the prior subsequent process of further precipitating magnesium by lime or evaporating to discharge sodium, the process is simplified, and the operation cost is obviously reduced.
According to an embodiment of the present invention, the source of the nickel deposition solution is not particularly limited, and may be selected by those skilled in the art according to actual needs, for example, the nickel deposition solution may be obtained by leaching nickel-containing material with sulfuric acid, such as leaching nickel-containing mineral with sulfuric acid. Further, the content of nickel in the nickel precipitating solution and the content of calcium oxide in the milk of lime are not particularly limited, for example, the content of nickel in the nickel precipitating solution can be 1-20g/L, such as 1g/L, 5g/L, 10g/L, 15g/L, 20g/L, and the content of calcium oxide in the milk of lime can be 10-40g/L, such as 10g/L, 15g/L, 20g/L, 25g/L, 30g/L, 35g/L, 40 g/L. The inventor finds that if the content of nickel in the nickel precipitation solution is too low, the treatment capacity is reduced, the equipment investment is increased, the process is not economical, if the content of nickel in the nickel precipitation solution is too high, the product separation is difficult, and the calcium content in the nickel hydroxide product is increased, so that the subsequent treatment is inconvenient.
According to still another embodiment of the present invention, the mass ratio of the nickel precipitating solution to the lime milk is not particularly limited, and may be selected by those skilled in the art according to actual needs, for example, according to the content of nickel in the nickel precipitating solution to calcium hydroxide in the lime milk, and specifically, the molar ratio of nickel in the nickel precipitating solution to calcium oxide in the lime milk may be 0.8 to 1.2: 1. the inventor finds that if the nickel precipitation solution is too much, the lime milk can not precipitate all nickel in the nickel precipitation solution, so that the underflow containing calcium sulfate has higher nickel content, and the process economy is also reduced; if the lime milk is too much, a large amount of unreacted calcium oxide is entrained in the product.
S200: the liquid-solid mixture is subjected to thickening treatment
In this step, the liquid-solid mixture is subjected to a thickening treatment so as to obtain an overflow containing the nickel hydroxide precipitate and an underflow containing calcium sulphate. The inventor finds that by carrying out thickening treatment on a liquid-solid mixture containing calcium sulfate sediment and nickel hydroxide sediment, because the particles of the calcium sulfate sediment and the nickel hydroxide sediment are very small, but calcium sulfate exists in a crystal form, and nickel hydroxide is in a flocculent state, the sedimentation velocity of the calcium sulfate is different from that of the nickel hydroxide, the calcium sulfate sedimentation velocity is higher than that of the nickel hydroxide, and the nickel hydroxide sediment and the calcium sulfate sediment can be separated after the thickening treatment, namely the nickel hydroxide and the calcium sulfate can be separated by adopting the thickening treatment without adding a flocculating agent, so that the cost for producing the nickel hydroxide is further reduced. Specifically, the thickening treatment may be performed by using a thickener. And in the process of carrying out thickening treatment on the liquid-solid mixture by the thickener, the rising speed of water flow in the thickener can be adjusted by adjusting the flow of underflow and overflow of the thickener, so that the aim of separating nickel hydroxide and calcium sulfate is fulfilled. It should be noted that if the nickel product needs to be reprocessed subsequently, the nickel product can be leached by sulfuric acid without separation after the nickel is precipitated by lime milk, and then the leaching is carried out by filtering to obtain high-concentration nickel sulfate solution and gypsum residue, the high-concentration nickel sulfate solution is further processed, and the gypsum residue is stockpiled.
Further, the specific number of the thickening treatment is not particularly limited, and a person skilled in the art can select the thickening treatment according to actual needs, for example, the thickening treatment can be adjusted according to the requirements of the acid consumption of the calcium sulfate-containing underflow acid washing and the direct yield of nickel, and as the number of the thickening separation stages increases, the acid consumption of the subsequent calcium sulfate-containing underflow acid washing decreases, and the direct yield of nickel increases. According to one embodiment of the invention, a multi-stage densification process may be included. Specifically, according to an embodiment of the present invention, referring to fig. 2, two-stage densification may be included:
s210: subjecting the liquid-solid mixture to primary thickening treatment
In this step, the liquid-solid mixture is subjected to a first thickening treatment so as to obtain a first underflow and a first overflow containing a nickel hydroxide precipitate. Wherein the first underflow is predominantly calcium sulfate with a small amount of nickel hydroxide also entrained. Thus, the nickel hydroxide and the calcium sulfate in the liquid-solid mixture can be separated preliminarily.
S220: the first underflow is subjected to secondary thickening treatment
In this step, the first underflow is subjected to a secondary thickening treatment in order to obtain a calcium sulphate-containing underflow and an overflow of the second nickel hydroxide containing precipitate, the overflow of the nickel hydroxide containing precipitate comprising the overflow of the first nickel hydroxide containing precipitate and the overflow of the second nickel hydroxide containing precipitate. Therefore, the separation of nickel hydroxide and calcium sulfate can be further realized, and the direct recovery rate of nickel is improved.
S300: filtering the overflow containing nickel hydroxide precipitate
In this step, the overflow of the nickel hydroxide containing precipitate is filtered to obtain nickel hydroxide and a filtrate. Thereby, the recovery of nickel is achieved. Further, referring to fig. 3, at least a portion of the resulting filtrate may be returned to step S100 for reuse. The inventors have conducted extensive studies and found that the nickel hydroxide obtained by the above treatment method of the present application has a nickel content of not less than 35 wt%, a calcium content of not more than 6 wt%, and a nickel content of not more than 5ppm in the filtrate. Namely, the method for treating the nickel-precipitating solution has high direct recovery rate and obvious effect.
According to the method for treating the nickel precipitation solution, the nickel precipitation solution is mixed with the lime cream, nickel sulfate in the nickel precipitation solution can react with calcium hydroxide in the lime cream to generate calcium sulfate and nickel hydroxide, both the calcium sulfate and the nickel hydroxide are solid precipitates, and the lime cream is used as a precipitator, so that the cost is low, and the operation of subsequent processes cannot be influenced; the liquid-solid mixture containing the calcium sulfate precipitate and the nickel hydroxide precipitate is subjected to thickening treatment, so that the calcium sulfate precipitate and the nickel hydroxide precipitate have very small particles, but the calcium sulfate exists in a crystal form, and the nickel hydroxide is in a flocculent state, the sedimentation velocity of the nickel hydroxide and the nickel hydroxide is different, the sedimentation velocity of the calcium sulfate is higher than that of the nickel hydroxide, the nickel hydroxide precipitate and the calcium sulfate precipitate can be separated after the thickening treatment, namely the nickel hydroxide and the calcium sulfate can be separated by adopting the thickening treatment without adding a flocculating agent, and the cost for producing the nickel hydroxide is further reduced. Therefore, the method adopts lime milk as a precipitator, simplifies the prior nickel precipitation process, saves the production cost of not less than 2000 yuan per ton of nickel compared with the prior nickel precipitation technology, simultaneously enables the direct recovery rate of nickel to reach 96 percent, has obvious effect, can treat the nickel at a large flow rate, and is suitable for industrial production application.
According to an embodiment of the present invention, referring to fig. 4, the method for treating a nickel deposition solution further includes:
s400: pickling the underflow containing calcium sulfate
In the step, the underflow containing calcium sulfate is subjected to acid washing and filtered to obtain acid washing liquid and calcium sulfate. The inventors have found that by subjecting the underflow containing calcium sulphate to an acid wash, impurities on the surface of the calcium sulphate can be washed away. Further, referring to fig. 5, at least a portion of the obtained calcium sulfate may be returned to S100 to be used as a seed crystal, thereby facilitating the reaction of nickel sulfate and calcium hydroxide in S100 and increasing the precipitation rate. And the inventor finds that calcium content in the calcium sulfate obtained after acid cleaning is not less than 25 wt% and nickel content is not more than 0.05 wt% through a great deal of research. Namely, the method has remarkable nickel yield when being used for treating the nickel precipitation solution. Further, the specific type of acid used for acid washing is not particularly limited, and may be selected by those skilled in the art according to actual needs, for example, sulfuric acid, so that even if the obtained calcium sulfate is returned to step S100 to be used as a seed crystal, no impurities are introduced, and the smooth running of the reaction is facilitated.
In the present application, the absolute temporal context is not shown between steps (1), (2), (3), and (4) and S100, S200, S300, and S400.
The invention will now be described with reference to specific examples, which are intended to be illustrative only and not to be limiting in any way.
Example 1
Mixing and precipitating a nickel precipitation solution with the nickel content of 10g/L and lime milk with the calcium oxide content of 40g/L, wherein the nickel precipitation solution is obtained by leaching nickel-containing minerals with sulfuric acid, and the molar ratio of nickel in the nickel precipitation solution to calcium oxide in the lime milk is 1: 1, so as to obtain a liquid-solid mixture; carrying out primary thickening treatment on the liquid-solid mixture so as to obtain a first underflow and an overflow of a first nickel hydroxide precipitate, and carrying out secondary thickening treatment on the first underflow so as to obtain an underflow containing calcium sulfate and an overflow of a second nickel hydroxide precipitate; the overflow of the first nickel hydroxide precipitate and the overflow of the second nickel hydroxide precipitate were filtered to obtain nickel hydroxide having a nickel content of 35.5 wt% and a calcium content of 5.6 wt% and a filtrate having a nickel content of 5 ppm. And (3) acid-washing the underflow containing calcium sulfate, and filtering to obtain acid-washed liquid and calcium sulfate with the calcium content of 25.6 wt% and the nickel content of 0.04 wt%. Compared with the existing sodium hydroxide nickel precipitation technology, the production cost of the ton nickel is saved by not less than 2000 yuan, and meanwhile, the direct recovery rate of the nickel is 96.02%, and the effect is obvious.
Example 2
Mixing and precipitating a nickel precipitation solution with nickel content of 5g/L and calcium oxide content of 20g/L, wherein the nickel precipitation solution is obtained by leaching nickel-containing minerals with sulfuric acid, and the molar ratio of nickel in the nickel precipitation solution to calcium oxide in lime milk is 1.2: 1, so as to obtain a liquid-solid mixture; carrying out primary thickening treatment on the liquid-solid mixture so as to obtain a first underflow and an overflow of a first nickel hydroxide precipitate, and carrying out secondary thickening treatment on the first underflow so as to obtain an underflow containing calcium sulfate and an overflow of a second nickel hydroxide precipitate; the overflow of the first nickel hydroxide precipitate and the overflow of the second nickel hydroxide precipitate were filtered to obtain nickel hydroxide having a nickel content of 36 wt% and a calcium content of 5.9 wt% and a filtrate having a nickel content of 5 ppm. And (3) pickling the underflow containing calcium sulfate, and filtering to obtain pickled liquid and calcium sulfate with the calcium content of 27 wt% and the nickel content of 0.05 wt%. Compared with the existing sodium hydroxide nickel precipitation technology, the production cost of the ton nickel is saved by not less than 2000 yuan, and meanwhile, the direct recovery rate of the nickel is 95.98%, and the effect is obvious.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (7)
1. A method of treating a nickel deposition solution, said nickel deposition solution comprising nickel sulfate, characterized in that said method consists of the following steps:
(1) mixing the nickel precipitation solution with lime cream for precipitation so as to obtain a liquid-solid mixture;
(2) carrying out thickening treatment on the liquid-solid mixture, and adjusting the rising speed of water flow in a thickener by adjusting the flow of underflow and overflow of the thickener so as to obtain overflow containing nickel hydroxide precipitate and underflow containing calcium sulfate;
(3) filtering the overflow containing the nickel hydroxide precipitate to obtain nickel hydroxide and filtrate;
(4) and (2) pickling the underflow containing the calcium sulfate, filtering to obtain pickled liquid and calcium sulfate, and returning at least one part of the calcium sulfate to the step (1), wherein the calcium content in the calcium sulfate is not less than 25 wt%, and the nickel content in the calcium sulfate is not more than 0.05 wt%.
2. The method of claim 1, wherein the nickel precipitation solution is a sulfuric acid leach of a nickel containing material.
3. The method according to claim 1 or 2, wherein in the step (1), the content of nickel in the nickel precipitation solution is 1-20g/L, and the content of calcium oxide in the milk lime is 10-40 g/L.
4. The method according to claim 1, wherein in the step (1), the molar ratio of nickel in the nickel precipitation solution to calcium oxide in the milk of lime is 0.8-1.2: 1.
5. the method according to claim 1, wherein, in the step (2), the thickening treatment includes a multi-stage thickening treatment;
optionally, in the step (2), the concentration treatment includes two-stage concentration treatment:
(2-1) subjecting the liquid-solid mixture to a first-stage thickening treatment to obtain a first underflow and an overflow of a first nickel hydroxide-containing precipitate;
(2-2) subjecting the first underflow to a secondary thickening treatment so as to obtain the underflow containing calcium sulphate and an overflow containing a second nickel hydroxide precipitate; the overflow stream comprising the nickel hydroxide precipitate includes an overflow stream of the first nickel hydroxide precipitate and an overflow stream of the second nickel hydroxide precipitate.
6. The method according to claim 1, wherein in step (3), the nickel hydroxide has a nickel content of not less than 35 wt% and a calcium content of not more than 6 wt%;
optionally, in step (3), the nickel content in the filtrate is not more than 5 ppm.
7. The process according to claim 1, characterized in that at least a part of the filtrate obtained in step (3) is returned to step (1).
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| CN201911031448.9A CN110747353B (en) | 2019-10-28 | 2019-10-28 | Method for treating nickel deposition solution |
| AU2020239801A AU2020239801B2 (en) | 2019-10-28 | 2020-09-25 | Method for treating metal-containing solution |
| ZA2020/06087A ZA202006087B (en) | 2019-10-28 | 2020-10-01 | Method for treating metal-containing solution |
| EP20201586.3A EP3816109B1 (en) | 2019-10-28 | 2020-10-13 | Method for treating metal-containing solution |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000345357A (en) * | 1999-06-09 | 2000-12-12 | Nippon Chem Ind Co Ltd | Method for treating aged electroless nickel plating solution |
| CN107400788A (en) * | 2017-07-18 | 2017-11-28 | 中国恩菲工程技术有限公司 | The method that nickel cobalt is precipitated in laterite nickel ore hydrometallurgical |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000345357A (en) * | 1999-06-09 | 2000-12-12 | Nippon Chem Ind Co Ltd | Method for treating aged electroless nickel plating solution |
| CN107400788A (en) * | 2017-07-18 | 2017-11-28 | 中国恩菲工程技术有限公司 | The method that nickel cobalt is precipitated in laterite nickel ore hydrometallurgical |
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