CN106987728B - A method of normal pressure phosphoric acid, which leaches nickel cobalt and synchronizes, from lateritic nickel ore prepares ferric phosphate - Google Patents
A method of normal pressure phosphoric acid, which leaches nickel cobalt and synchronizes, from lateritic nickel ore prepares ferric phosphate Download PDFInfo
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- CN106987728B CN106987728B CN201710195235.4A CN201710195235A CN106987728B CN 106987728 B CN106987728 B CN 106987728B CN 201710195235 A CN201710195235 A CN 201710195235A CN 106987728 B CN106987728 B CN 106987728B
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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
- C22B23/0407—Leaching processes
- C22B23/0415—Leaching processes with acids or salt solutions except ammonium salts solutions
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B25/00—Phosphorus; Compounds thereof
- C01B25/16—Oxyacids of phosphorus; Salts thereof
- C01B25/26—Phosphates
- C01B25/37—Phosphates of heavy metals
- C01B25/375—Phosphates of heavy metals of iron
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/80—Compositional purity
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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 kind of from lateritic nickel ore, and normal pressure phosphoric acid leaches nickel cobalt and synchronizes the method for preparing ferric phosphate；Lateritic nickel ore is subjected to the processing of normal pressure Ore Leaching, is then separated by solid-liquid separation, obtains the leached mud of ferric phosphate and the leachate of concentrating cobalt and nickel；In leaching process, the acid is phosphoric acid, and phosphoric acid concentration is 1~3mol/L；Phosphoric acid dosage is 1~3 times for leaching metallic element theoretical molar amount in transition lateritic nickel ore.It makes the transition at 300 DEG C~400 DEG C in advance before the processing of lateritic nickel ore Ore Leaching.This method is particularly suitable for the low-grade limonite type lateritic nickel ore of processing, and nickel and cobalt recovery rate height, ferronickel good separating effect, leached mud is ferric phosphate, can be used for preparing ferric phosphate lithium cell, it can also be used to manufacture the raw material of catalyst, ceramics etc..
Description
Technical field
The invention belongs to lateritic nickel ore technical field of wet metallurgy, and in particular to one kind normal pressure phosphoric acid from lateritic nickel ore soaks
The method of nickel cobalt co-production ferric phosphate out.
Background technique
Lateritic nickel ore is the main source of current nickel production, and (1% is left since nickel grade is lower for limonite type lateritic nickel ore
It is right), iron content high (generally higher than 40%), content of magnesium it is relatively low (5% or so), mainly extracted using wet-leaching therein
The valuable elements such as nickel cobalt.Relative to pyrometallurgical smelting, wet-leaching process energy consumption is low, simple process, cost of investment are low, has simultaneously
Recycle the clear superiorities such as cobalt in lateritic nickel ore.
Acid leaching process mainly includes high pressure acidleach and two kinds of normal pressure acidleach in lateritic nickel ore.High pressure acidleach handles lateritic nickel ore
It is using sulfuric acid as leaching agent, (245~270 DEG C of extraction temperature and leaching 4~5MPa of pressure) realizes nickel cobalt at high temperature under high pressure
Selectively leaching, nickel and cobalt recovery rate commonly reaches 90% or so, and the impurity compositions such as iron, aluminium are largely focused on leached mud.Gu
After liquid separation, sulfide or basic species are added by the sulfide and hydroxide of nickel cobalt precipitating output nickel cobalt in solution in leachate
Object, then product is made by refining.Industrial high pressure acid leaching process high, siliceous lower laterite nickel of magnesium mainly for the treatment of iron content
Mine, mainly due in leaching process, the dissolution of magnesium will increase sour consumption, the subsequent cost that magnesium is handled in leachate also compared with
It is high.Further, since using severe tight high temperature, high pressure and high corrosion working condition, equipment which uses special material
It is produced, such as titanium-alloy high-pressure kettle, substantially increases the production cost of enterprise.On the other hand, in high pressure leaching process, by
It is easy to cause autoclave fouling in the generation of bloodstone, also will affect the direct motion of production.
Compared to high pressure acidleach, normal pressure acid leaching process is more simple, and energy consumption is lower, drops without using autoclave equipment
Low investment expense.Leaching agent used in normal pressure acidleach is generally hydrochloric acid, sulfuric acid etc..Due to nickel master in limonite type lateritic nickel ore
Will for preservation in goethite, leachings of nickel is based primarily upon the dissolution of goethite in the form of lattice replaces, and only by normal pressure acidleach
It is difficult to dissolve goethite, causes normal pressure acid leaching process to leach low and ferronickel there are nickel and leach two outstanding problems of poor selectivity.Though
Some reducing agents (such as thiosulfate, dithionite, SO are so added during acidleach2Deng) or use reproducibility sour
The dissolution of (citric acid etc.) Lai Qianghua goethite, can be improved the leaching rate of nickel.But there is no obtain for ferronickel leaching simultaneously problem
It is solved to effective, further separates nickel in leachate, iron becomes difficult, processing cost significantly improves.On the one hand, iron leaching rate
Raising along with a large amount of acid consumption, on the other hand, it is also necessary to iron in a large amount of alkaline matter precipitation and separation leachate.Cause
This is based on above-mentioned two problems, and although the normal pressure acid leaching process of lateritic nickel ore has a clear superiority, but be not able to achieve industry always
Production.
Major impurity element in lateritic nickel ore is iron, and in traditional wet processing, the iron in lateritic nickel ore is not obtained
It utilizes well, if the iron in lateritic nickel ore can be recycled, the waste of iron resource will be greatly reduced.
Ferric phosphate often makees the raw material of manufacture ferric phosphate lithium cell, catalyst and ceramics etc..Although the conductivity of ferric phosphate compared with
It is low, but due to the problem of overcoming conductivity in recent years, and ferric phosphate can recycle thermostabilization, be used as electrode
Material using more and more common.In steel and manufacturing technology, ferric phosphate is bonded in metal surface, metal can be prevented
Further it is oxidized.Ferric phosphate also can be used as base coating, for increasing the adhesive force of iron or steel surface, be usually used at antirust
Reason.Ferric phosphate mainly reacts generation, higher cost with molysite by phosphate at present.If phosphorus directly can be manufactured by raw material of ore
Sour iron not only can be reduced the waste of resource, while can also generate additional economic value.
Summary of the invention
The present invention is big for the existing material loss of existing normal pressure strong acid leaching, and nickel leaches low, ferronickel and leaches poor selectivity
The problems such as, method that normal pressure phosphoric acid leaches nickel cobalt co-production ferric phosphate that the present invention provides a kind of from lateritic nickel ore；It is intended to make
Nickel cobalt and a step of iron efficiently separate, co-production FePO4。
All the time, efficient, highly selective normal pressure Ore Leaching technique is the R&D target of this field researcher.It is existing
In technology, generally believes and first metallic element in lateritic nickel ore is leached together using strong acid, then again in solution system
Valuable ion isolation, this mode such as nickel cobalt, iron necessarily will cause a large amount of wastes of material, in addition, being also difficult to realize nickel cobalt
With the Selectively leaching of iron.
In order to overcome, material loss present in existing normal pressure Ore Leaching technique is big, leaches the poor, process flow of selectivity
The problems such as long, the present inventor attempt those skilled in the art not frequently with phosphoric acid as leaching agent, it is intended to a step leach nickel cobalt
And directly selecting property ground precipitated iron, but the molysite that precipitating is commonly encountered in experimentation covers remaining mineral aggregate, and blocking is leached channel, is made
Leaching agent can not be contacted with remaining pit wood, be leached, and cause Elements Leaching rate is lower, extends extraction time to be still difficult to reach satisfied
Leaching effect.
But inventor furthers investigate discovery, is joined by the acid strength of phosphoric acid normal pressure leaching technical process, acid solution dosage etc.
Several collaborations ingenious can evade the problem of ferric phosphate precipitating is covered on mineral aggregate surface, and balance mineral aggregate leaches and ferric phosphate precipitating, into
And the leaching effect of valuable metal is unexpectedly promoted, reach a step of iron and nickel cobalt, efficiently separate, therefore following technology is provided
Scheme:
A method of normal pressure phosphoric acid, which leaches nickel cobalt and synchronizes, from lateritic nickel ore prepares ferric phosphate: lateritic nickel ore is carried out
The processing of normal pressure Ore Leaching, is then separated by solid-liquid separation, obtains the leached mud of ferric phosphate and the leachate of concentrating cobalt and nickel；Leaching process
In, the acid is phosphoric acid, and phosphoric acid concentration is 1~3mol/L；Phosphoric acid dosage is to leach metallic element in transition lateritic nickel ore
1~3 times of theoretical molar amount.
Inventor also found, carries out transition processing at a certain temperature to lateritic nickel ore, can cooperate with further gram
It takes phosphoric acid and leaches influence of the step precipitation process ferric phosphate precipitation to channel is leached；The separating effect of Fe/Ni can further be promoted.
Preferably, making the transition at 300 DEG C~400 DEG C in advance before the processing of lateritic nickel ore Ore Leaching.
The inventors discovered that carry out transition processing at the preferred temperature, except subsequent processing can be obviously shortened
Time be it is outer, can also assist to solve the obstruction that precipitates in phosphoric acid leaching process and leach channel, collaboration promotes leaching rate, in addition, also
Help to promote Ni/Fe leaching selectivity.The present inventors have additionally discovered that the leaching effect higher than 400 DEG C is very when being lower than 300 DEG C
Difference.
Further preferably, it makes the transition at 380 DEG C~400 DEG C in advance before the processing of lateritic nickel ore Ore Leaching.
Preferably the normal pressure phosphoric acid from lateritic nickel ore leaches nickel cobalt and synchronizes the method for preparing ferric phosphate one kind of the invention: packet
Include following steps:
Step f1): it makes the transition at 300 DEG C~400 DEG C to lateritic nickel ore, obtains transition lateritic nickel ore；
Step (2): transition lateritic nickel ore is subjected to the processing of normal pressure Ore Leaching, is then separated by solid-liquid separation, obtains ferric phosphate
Leached mud and concentrating cobalt and nickel leachate；In leaching process, the acid is phosphoric acid, and phosphoric acid concentration is 1~3mol/L；Phosphoric acid
Dosage is 1~3 times for leaching metallic element theoretical molar amount in transition lateritic nickel ore.
The inventors discovered that using phosphoric acid as leaching agent, the temperature described in step (1) under the conditions of, makes the transition, then cooperates with
It is matched with concentration, the acid solution dosage of the phosphoric acid of step (2), the leaching efficiency of phosphoric acid can be unexpectedly promoted, promote valuable member
The leaching rate of element is, it can be achieved that a step, efficiently separate the purpose of nickel cobalt and iron.It by the method for the invention, can also coproduction high quality
Ferric phosphate is added without extra material in entire treatment process, and material loss is small, and effect on environment is small.
In the present invention, the lateritic nickel ore is limonite type lateritic nickel ore.
At a temperature of the transition, the preferred time that makes the transition is 30min~120min.
Further preferably, the transition time is 30~60min.
The present inventor overcomes existing room temperature acid leaching process to generally believe the technology prejudice for needing strong acid, using phosphoric acid as leaching
Agent out is matched with the transition processing and the Collaborative Control to phosphoric acid leaching condition, can a step realize iron and nickel cobalt it is efficient,
Selective Separation.
During acidleach, the concentration of phosphoric acid, the dosage of phosphoric acid have influence to efficient, the selectivity of iron and nickel cobalt.
H in the concentration of phosphoric acid, the dosage control solution of phosphoric acid+Concentration and final phosphorus acid ion concentration.Phosphoric acid
Concentration is too low, and lateritic nickel ore is difficult to sufficiently react with phosphoric acid, leaches in addition, covering blocking is precipitated in the ferric phosphate of in-situ precipitate too early
Channel, and then directly resulting in unreacted mineral aggregate in leached mud can be a large amount of remaining, leaching effect is poor.However, phosphoric acid concentration is excessively high,
Corresponding H+ concentration will be high, FePO4It is difficult to largely be formed, more iron can be with Fe3+Form exist in solution, only exist
In the preferred scope, a balance can be reached, lateritic nickel ore is sufficiently reacted with phosphoric acid, while because of H+Consumption, solution
In pH just at FePO4The range generated is precipitated, can just generate ferric phosphate precipitating at this time, so that nickel cobalt and iron selectivity point
From.
Preferably, the concentration of phosphoric acid is 2.5~3mol/L.
Preferably, phosphoric acid dosage is 1~3 times for leaching metallic element theoretical molar amount in transition lateritic nickel ore.
Preferably, the solid-liquid weight ratio of transition lateritic nickel ore and the phosphoric acid is 1 under the phosphoric acid concentration:
3~10；Further preferably 1: 10.
The temperature control of leaching process equally will affect congestion situations of the ferric phosphate to leaching channel of in-situ precipitate, as
It is preferred that the temperature of leaching process is room temperature to 90 DEG C；The temperature of preferred leaching process is 40~90 DEG C.
In step (2), in the phosphoric acid concentration and under leaching parameter, extraction time is preferably 1~12h；It is further excellent
It is selected as 1~3h.
One kind of the invention preferably leaches nickel cobalt from lateritic nickel ore and synchronizes the method for preparing ferric phosphate, lateritic nickel ore leaching
30min~120min is handled in 300 DEG C~400 DEG C transition before out；Acidleach process is then carried out, during acidleach, is made with phosphoric acid
For leaching agent, lateritic nickel ore is leached using normal pressure acid leaching process, after separation of solid and liquid, nickel cobalt enters in solution, and iron is retained in leaching
In slag, the Selectively leaching separation of nickel cobalt and iron is realized；The phosphoric acid dosage is that phosphoric acid theory needed for Gold in Ores category element is used
1~3 times of amount；In the normal pressure acid leaching process, phosphoric acid concentration is 1~3mol/L, and extraction temperature is room temperature to 90 DEG C, when leaching
Between 1~12h.It is preferred that 40~90 DEG C of extraction temperature, 1~3h of extraction time.
A kind of more preferably scheme, by limonite type lateritic nickel ore 300 DEG C~400 DEG C transition handle 30min~
120min；It will then be immersed in the phosphoric acid solution that concentration is 1~3mol/L, carried out at leaching under the mineral aggregate normal pressure after transition
Reason, extraction temperature are 40~90 DEG C, 1~3h of extraction time；Through being separated by solid-liquid separation after leaching process, nickel cobalt enters in solution, and iron is rich
Collection is in leached mud.
Using after above-mentioned processing in the present invention, nickel, cobalt in lateritic nickel ore enter solution and iron is converted into ferric phosphate precipitating,
Realize that nickel, cobalt and iron in lateritic nickel ore efficiently separate.Ferric phosphate can be used as the raw material of manufacture ferric phosphate lithium cell etc., improve this
Invent the economic benefit generated.
Transition processing in the present invention can significantly improve the leaching efficiency of phosphoric acid leaching process.At transition at the temperature
Reason, can be transformed into bloodstone for goethite in lateritic nickel ore, this destroys the crystal structure of goethite in the process, while increasing red
The specific surface area of native nickel minerals；The Leaching Systems of the cooperation phosphoric acid, such as phosphoric acid concentration, extraction temperature, phosphoric acid dosage
Collaborative Control, can avoid because one step in-situ precipitate due to caused by leach channel blockage, and then significantly improve nickel cobalt leaching rate；It realizes
One step of the valuable element in lateritic nickel ore efficiently separates.
Beneficial effect
Compared with prior art, transition through the invention is cooperateed with the coupling that phosphoric acid leaches, and it is heavy in situ to overcome a step
Form sediment and caused by leaching channel blockage, the defect of leaching effect difference, realize condition of normal pressure next step, efficiently and selectively soak
Iron nickel cobalt in lateritic nickel ore out.By this method, achieving the purpose that nickel cobalt is efficiently separated with iron, the leaching rate of nickel and cobalt is high,
The leaching rate of iron is low, good separating effect.Coproduction ferric phosphate simultaneously, increases added value of product.The method of the present invention is easy to operate, easily
In control, there is extremely strong practicability.
It is found through experiments that, using the method for the present invention, compared to the conventional extract technology such as existing hydrochloric acid, sulfuric acid, iron
Leaching rate can drop to 10% hereinafter, nickel iron is leached than being increased to 20 or more by existing 0.9~1.5 by existing 80% or more.
The nickel-cobalt of the application and the separating effect of iron are obviously improved.
In addition, the application using phosphoric acid as leaching agent, compared to existing wet process, phposphate to ferric phosphate,
Neutralization without other strong acid, highly basic and unclassified stores is lost, and material loss is small, and waste generation is small, more environmentally friendly.
The quality for the ferric phosphate that one step coproduction obtains is higher, and the purity of ferric phosphate may be up to 90% or more, can be applied to make
The fields such as standby electrode material, ceramics.
Detailed description of the invention
Fig. 1 is the material phase analysis figure of 1 leached mud of embodiment；
Fig. 2 is the material phase analysis figure of 2 leached mud of embodiment.
Specific embodiment
In order to illustrate more clearly of the present invention, following tests data are enumerated, application range of the invention is not by following implementation
The limitation of convention mould, data.
The main chemical compositions of lateritic nickel ore used are as shown in table 1, and broken, ore grinding is pre-dried to 74 μm in lateritic nickel ore
Lateritic nickel ore powder below.
The liquid-solid ratio that following embodiment refers to refers both to weight ratio unless specified or limited otherwise.
1 ore chemistry ingredient of table/%
| TFe | SiO2 | Al2O3 | CaO | MgO |
| 43.95 | 4.25 | 9.72 | 0.15 | 0.98 |
| Ni | Co | MnO2 | Cr2O3 | LOI |
| 1.03 | 0.13 | 1.25 | 3.25 | 15.76 |
Embodiment 1:
Lateritic nickel ore leaches 10h, liquid-solid ratio 10: 1 in the phosphoric acid solution of 3mol/L, and extraction temperature is 80 DEG C.
The leaching rate of nickel is 95.97%, and the leaching rate of cobalt is 87.61%, and the leaching rate of iron is 12.19%.Ferronickel leaches
Rate ratio is 7.87.The main chemical compositions of leached mud are as shown in table 2
2 leached mud main chemical compositions of table/%
| TFe | SiO2 | Al2O3 | P | MgO |
| 32.93 | 0.49 | 2.70 | 20.99 | 0.758 |
| Ni | Co | MnO2 | Cr2O3 | |
| 0.037 | 0.017 | 0.59 | 1.41 |
The material phase analysis figure of the leached mud of the present embodiment is shown in Fig. 1, and as seen from Figure 1, leached mud object is mutually FePO4·
2H2O。
Embodiment 2:
Lateritic nickel ore roasts 1h at 400 DEG C, and calcining leaches 2h in the phosphoric acid solution of 3mol/L, liquid-solid ratio 10: 1,
Extraction temperature is 80 DEG C.
The leaching rate of nickel is 98.13%, and the leaching rate of cobalt is 87.69%, and the leaching rate of iron is 9.39%.Ferronickel leaching rate
Than being 10.45
Embodiment 3:
Lateritic nickel ore roasts 1h at 400 DEG C, and calcining leaches 3h, liquid-solid ratio 10:1 in the phosphoric acid solution of 3mol/L,
Extraction temperature is 80 DEG C.
The leaching rate of nickel is 98.43%, and the leaching rate of cobalt is 89.69%, and the leaching rate of iron is 7.08%.Ferronickel leaching rate
Than being 13.90.The main chemical compositions of leached mud are as shown in table 3
3 leached mud main chemical compositions of table/%
The material phase analysis figure of the leached mud of the present embodiment is shown in Fig. 2, and as seen from Figure 2, leached mud object is mutually FePO4·
2H2O。
Embodiment 4:
Lateritic nickel ore roasts 1h at 400 DEG C, and calcining leaches 2h in the phosphoric acid solution of 2.5mo1/L, liquid-solid ratio 10:
1, extraction temperature is 80 DEG C.
The leaching rate of nickel is 94.54%, and the leaching rate of cobalt is 82.43%, and the leaching rate of iron is 4.16%.Ferronickel leaching rate
Than being 22.72.
Embodiment 5:
Lateritic nickel ore roasts 1h at 400 DEG C, and calcining leaches 2h in the phosphoric acid solution of 1mo1/L, liquid-solid ratio 10: 1,
Extraction temperature is 80 DEG C.
The leaching rate of nickel is 39.00%, and the leaching rate of cobalt is 60.65%, and the leaching rate of iron is 1.41%.Ferronickel leaching rate
Than being 27.66.
Embodiment 6:
Lateritic nickel ore roasts 1h at 400 DEG C, and calcining leaches 2h in the phosphoric acid solution of 2mol/L, liquid-solid ratio 10: 1,
Extraction temperature is 80 DEG C.
The leaching rate of nickel is 89.77%, and the leaching rate of cobalt is 78.38%, and the leaching rate of iron is 3.71%.Ferronickel leaching rate
Than being 24.20.
Embodiment 7:
Lateritic nickel ore roasts 1h at 300 DEG C, and calcining leaches 2h in the phosphoric acid solution of 3mol/L, liquid-solid ratio 10: 1,
Extraction temperature is 80 DEG C.
The leaching rate of nickel is 86.54%, and the leaching rate of cobalt is 81.32%, and the leaching rate of iron is 21.74%.Ferronickel leaches
Rate ratio is 3.98.
Comparative example 1:
Lateritic nickel ore leaches 2h, liquid-solid ratio 10: 1 in the sulfuric acid solution of 3mol/L, and extraction temperature is 80 DEG C.
The leaching rate of nickel is 63.49%, and the leaching rate of cobalt is 46%, and the leaching rate of iron is 57.43%.Ferronickel leaching rate ratio
It is 1.10.
Comparative example 2:
Lateritic nickel ore roasts 1h at 400 DEG C, then leaches 2h in the sulfuric acid solution of 3mol/L, liquid-solid ratio 10: 1,
Extraction temperature is 80 DEG C.
The leaching rate of nickel is 93.85%, and the leaching rate of cobalt is 88.67%, and the leaching rate of iron is 89.95%.Ferronickel leaches
Rate ratio is 1.04.
Comparative example 3:
Lateritic nickel ore roasts 1h at 400 DEG C, and calcining leaches 2h in the phosphoric acid solution of 4mol/L, liquid-solid ratio 10: 1,
Extraction temperature is 80 DEG C.
The leaching rate of nickel is 98.52%, and the leaching rate of cobalt is 91.11%, and the leaching rate of iron is 74.54%.Ferronickel leaches
Rate ratio is 1.32
Comparative example 4
Lateritic nickel ore roasts 1h at 500 DEG C, and calcining leaches 2h in the phosphoric acid solution of 3mol/L, liquid-solid ratio 10: 1,
Extraction temperature is 80 DEG C.
The leaching rate of nickel is 93.74%, and the leaching rate of cobalt is 89.96%, and the leaching rate of iron is 39.76%.Ferronickel leaches
Rate ratio is 2.36
Comparative example 5
Lateritic nickel ore roasts 1h at 250 DEG C, and calcining leaches 2h in the phosphoric acid solution of 3mol/L, liquid-solid ratio 10: 1,
Extraction temperature is 80 DEG C.
The leaching rate of nickel is 82.13%, and the leaching rate of cobalt is 64.01%, and the leaching rate of iron is 38.53%.Ferronickel leaches
Rate ratio is 2.13.
Claims (7)
1. a kind of normal pressure phosphoric acid from lateritic nickel ore leaches nickel cobalt and synchronizes the method for preparing ferric phosphate；It is characterized by: laterite
Nickel minerals makes the transition at 300 DEG C~400 DEG C in advance, then lateritic nickel ore is carried out the processing of normal pressure Ore Leaching, is then separated by solid-liquid separation,
Obtain the leached mud of ferric phosphate and the leachate of concentrating cobalt and nickel；
In leaching process, the acid is phosphoric acid, and phosphoric acid concentration is 2.5~3mol/L；Phosphoric acid dosage is to leach transition laterite
1~3 times of metallic element theoretical molar amount in nickel minerals；
The temperature of leaching process is room temperature to 90 DEG C.
2. normal pressure phosphoric acid leaches nickel cobalt and synchronizes the method for preparing ferric phosphate from lateritic nickel ore as described in claim 1；Its
Be characterized in that: the time for the processing that makes the transition is 30min~120min.
3. normal pressure phosphoric acid leaches nickel cobalt and synchronizes the method for preparing ferric phosphate from lateritic nickel ore as described in claim 1；Its
Be characterized in that: in leaching process, the solid-liquid weight ratio of transition lateritic nickel ore and the phosphoric acid is 1:3~10.
4. normal pressure phosphoric acid leaches nickel cobalt and synchronizes the method for preparing ferric phosphate from lateritic nickel ore as described in claim 1；Its
Be characterized in that: extraction time is 1~12h.
5. normal pressure phosphoric acid leaches nickel cobalt and synchronizes the method for preparing ferric phosphate from lateritic nickel ore as claimed in claim 4；Its
Be characterized in that: extraction time is 1~3h.
6. normal pressure phosphoric acid leaches nickel cobalt and synchronizes the method for preparing ferric phosphate from lateritic nickel ore as described in claim 1；Its
Be characterized in that: the lateritic nickel ore is limonite type lateritic nickel ore.
7. normal pressure phosphoric acid leaches nickel cobalt and synchronizes the method for preparing ferric phosphate from lateritic nickel ore as claimed in claim 6；Its
It is characterized in that: limonite type lateritic nickel ore is handled into 30min~120min in 300 DEG C~400 DEG C transition；It then will be after transition
It being immersed under mineral aggregate normal pressure in the phosphoric acid solution that concentration is 1~3mol/L, carries out leaching process, extraction temperature is 40~90 DEG C,
1~3h of extraction time；Through being separated by solid-liquid separation after leaching process, nickel cobalt enters in solution, and iron is enriched in leached mud.
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| CN109065996B (en) * | 2018-08-02 | 2020-02-04 | 中南大学 | Method for regenerating waste nickel cobalt lithium manganate ternary cathode material |
| CN110615420B (en) * | 2019-09-17 | 2021-04-06 | 北京科技大学 | Method for preparing iron phosphate from laterite nickel ore leaching slag |
| CN111254281B (en) * | 2020-03-30 | 2021-01-29 | 中南大学 | Method for pressure phosphoric acid leaching of laterite-nickel ore |
| CN111394595B (en) * | 2020-04-17 | 2021-04-23 | 中南大学 | Method for extracting nickel and cobalt from phosphoric acid leaching solution of laterite-nickel ore |
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