CN106987728A - A kind of normal pressure phosphoric acid from lateritic nickel ore leaches nickel cobalt and the method for synchronously preparing ferric phosphate - Google Patents

A kind of normal pressure phosphoric acid from lateritic nickel ore leaches nickel cobalt and the method for synchronously preparing ferric phosphate Download PDF

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CN106987728A
CN106987728A CN201710195235.4A CN201710195235A CN106987728A CN 106987728 A CN106987728 A CN 106987728A CN 201710195235 A CN201710195235 A CN 201710195235A CN 106987728 A CN106987728 A CN 106987728A
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phosphoric acid
leaching
ore
ferric phosphate
normal pressure
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CN106987728B (en
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李光辉
朱忠平
周群
罗骏
彭志伟
饶明军
姜涛
张元波
郭宇峰
张鑫
王江
彭建辉
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Central South University
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    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22BPRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B23/00Obtaining nickel or cobalt
    • C22B23/04Obtaining nickel or cobalt by wet processes
    • C22B23/0407Leaching processes
    • C22B23/0415Leaching processes with acids or salt solutions except ammonium salts solutions
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01BNON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B25/00Phosphorus; Compounds thereof
    • C01B25/16Oxyacids of phosphorus; Salts thereof
    • C01B25/26Phosphates
    • C01B25/37Phosphates of heavy metals
    • C01B25/375Phosphates of heavy metals of iron
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01PINDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00Physical properties of inorganic compounds
    • C01P2006/80Compositional purity
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00Technologies related to metal processing
    • Y02P10/20Recycling

Abstract

Nickel cobalt and the method for synchronously preparing ferric phosphate are leached the invention discloses a kind of normal pressure phosphoric acid from lateritic nickel ore;Lateritic nickel ore is subjected to normal pressure Ore Leaching processing, separation of solid and liquid is then carried out, obtains the leached mud of ferric phosphate and the leachate of concentrating cobalt and nickel;In leaching process, described acid is phosphoric acid, and phosphoric acid concentration is 1~3mol/L;Phosphoric acid dosage is leach metallic element theoretical molar amount in transition lateritic nickel ore 1~3 times.Lateritic nickel ore Ore Leaching before processing makes the transition at 300 DEG C~400 DEG C in advance.This method is particularly suitable for handling low-grade limonite type lateritic nickel ore, and nickel and cobalt recovery rate is high, ferronickel good separating effect, and leached mud is ferric phosphate, available for preparing ferric phosphate lithium cell, it can also be used to manufacture the raw material of catalyst, ceramics etc..

Description

A kind of normal pressure phosphoric acid from lateritic nickel ore leaches nickel cobalt and synchronously prepares ferric phosphate Method
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 Go out the method for nickel cobalt co-production ferric phosphate.
Background technology
Lateritic nickel ore is the main source of current nickel production, and (1% is left because nickel grade is relatively low 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), it is main to extract therein using wet-leaching The valuable elements such as nickel cobalt.Relative to pyrometallurgical smelting, wet-leaching process energy consumption is low, technique is simple, cost of investment is low, has simultaneously Reclaim the clear superiority such as cobalt in lateritic nickel ore.
Acid leaching process mainly includes two kinds of high pressure acidleach and normal pressure acidleach in lateritic nickel ore.High pressure acidleach handles lateritic nickel ore It is that, using sulfuric acid as leaching agent, (4~5MPa of 245~270 DEG C of extraction temperature and leaching 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 composition such as iron, aluminium is largely focused on leached mud.Gu After liquid separation, sulfide and hydroxide that sulfide or basic species precipitate nickel cobalt in solution output nickel cobalt are added in leachate Thing, then product is made by refining.Industrial high pressure acid leaching process is mainly for the treatment of the laterite nickel that iron content is high, siliceous magnesium is relatively low Ore deposit, mainly due in leaching process, the dissolving of magnesium can increase sour consumption, subsequently in leachate handle magnesium cost also compared with It is high.Further, since using severe tight high temperature, high pressure and high corrosion working condition, the equipment that the technique needs to use special material Produced, such as titanium-alloy high-pressure kettle, substantially increase the production cost of enterprise.On the other hand, in high pressure leaching process, by Autoclave fouling is easily caused in the generation of bloodstone, the direct motion of production can be also influenceed.
Compared to high pressure acidleach, normal pressure acid leaching process is more simple, and energy consumption is lower, without using autoclave equipment so as to drop Low investment expense.The leaching agent used in normal pressure acidleach is generally hydrochloric acid, sulfuric acid etc..Due to nickel master in limonite type lateritic nickel ore To replace form preservation in goethite with lattice, the leaching of nickel is based primarily upon the dissolving of goethite, and only passes through normal pressure acidleach It is difficult to dissolve goethite, causes normal pressure acid leaching process to there is nickel and leach low and ferronickel leaching two outstanding problems of poor selectivity.Though Some reducing agents (such as thiosulfate, dithionite, SO are so added during acidleach2Deng) or it is sour using reproducibility (citric acid etc.) strengthens the dissolving of goethite, it is possible to increase the leaching rate of nickel.But ferronickel leaching simultaneously problem is not obtained To effective solution, further separation nickel, iron become difficult in leachate, and processing cost is significantly improved.On the one hand, iron leaching rate Raising along with a large amount of sour consumption, on the other hand, in addition it is also necessary to iron in substantial amounts of alkaline matter precipitation separation leachate.Cause This, based on above-mentioned two problems, although the normal pressure acid leaching process of lateritic nickel ore has a clear superiority, but fails to realize industry always Production.
Major impurity element in lateritic nickel ore is iron, in traditional wet processing, and the iron in lateritic nickel ore is not obtained Utilize 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 electrical conductivity of ferric phosphate compared with It is low, but be due to the problem of overcoming electrical conductivity in recent years, and ferric phosphate can be recycled, it is used as electrode to thermally-stabilised The use of material is more and more universal.In steel and manufacturing technology, ferric phosphate is bonded in metal surface, metal can be prevented Further it is oxidized.Ferric phosphate, for increasing the adhesive force of iron or steel surface, can also be usually used at antirust as base coating Reason.Main reacted by phosphate and molysite of current ferric phosphate generates, and cost is higher.If phosphorus can be manufactured directly by raw material of ore Sour iron, can not only reduce the waste of resource, while extra economic value can also be produced.
The content of the invention
The present invention leaches the material loss existed greatly for existing normal pressure strong acid, and nickel leaches low, ferronickel and leaches poor selectivity The problems such as, the invention provides a kind of method that normal pressure phosphoric acid from lateritic nickel ore leaches nickel cobalt co-production ferric phosphate;It is intended to make Nickel cobalt and a step of iron are efficiently separated, co-production FePO4
All the time, efficient, the normal pressure Ore Leaching technique of high selectivity is the R&D target of this area researcher.It is existing In technology, generally believe and first metallic element in lateritic nickel ore is leached in the lump using strong acid, then again in solution system The valuable ion isolation such as nickel cobalt, iron, this mode will necessarily 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, the material loss present in existing normal pressure Ore Leaching technique is big, leach the poor, technological process of selectivity Long the problems such as, 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 the remaining mineral aggregate of molysite covering of precipitation is commonly encountered in precipitated iron, but experimentation, block and leach passage, make Leaching agent can not cause Elements Leaching rate is relatively low, extend extraction time to be still difficult to reach satisfaction with the contact of remaining pit wood, leaching Leaching effect.
But inventor's further investigation is found, is joined by the acid strength of phosphoric acid normal pressure leaching technical process, acid solution consumption etc. Several collaborations, ingenious can evade the problem of ferric phosphate precipitation is covered in mineral aggregate surface, and balance mineral aggregate is leached and ferric phosphate precipitation, entered And the leaching effect of valuable metal is unexpectedly lifted, reach a step of iron and nickel cobalt, efficiently separate, therefore following technology is provided Scheme:
A kind of normal pressure phosphoric acid from lateritic nickel ore leaches nickel cobalt and the method for synchronously preparing ferric phosphate:Lateritic nickel ore is carried out The processing of normal pressure Ore Leaching, then carries out separation of solid and liquid, obtains the leached mud of ferric phosphate and the leachate of concentrating cobalt and nickel;Leaching process In, described acid is phosphoric acid, and phosphoric acid concentration is 1~3mol/L;Phosphoric acid dosage is metallic element in leaching transition lateritic nickel ore 1~3 times of theoretical molar amount.
Inventor be also found, transition processing is carried out at a certain temperature to lateritic nickel ore, can cooperate with further gram Take phosphoric acid and leach influence of the step precipitation process ferric phosphate precipitation to leaching passage;Fe/Ni separating effect can further be lifted.
Preferably, lateritic nickel ore Ore Leaching before processing makes the transition at 300 DEG C~400 DEG C in advance.
The inventors discovered that, transition processing is carried out at described preferred temperature, except can substantially shorten follow-up processing Time is outer, can also assist the obstruction for solving to precipitate in phosphoric acid leaching process to leach passage, collaboration lifting leaching rate, in addition, also Lifting Ni/Fe is contributed to leach selectivity.The present inventors have additionally discovered that, during less than 300 DEG C, the leaching effect higher than 400 DEG C is very Difference.
Further preferably, lateritic nickel ore Ore Leaching before processing makes the transition at 380 DEG C~400 DEG C in advance.
A kind of preferred normal pressure phosphoric acid from lateritic nickel ore of the present invention leaches nickel cobalt and the method for synchronously preparing ferric phosphate:Bag Include following steps:
Step f1):Lateritic nickel ore is made the transition at 300 DEG C~400 DEG C, transition lateritic nickel ore is obtained;
Step (2):Transition lateritic nickel ore is subjected to normal pressure Ore Leaching processing, separation of solid and liquid is then carried out, obtains ferric phosphate Leached mud and concentrating cobalt and nickel leachate;In leaching process, described acid is phosphoric acid, and phosphoric acid concentration is 1~3mol/L;Phosphoric acid Dosage is leach metallic element theoretical molar amount in transition lateritic nickel ore 1~3 times.
The inventors discovered that, using phosphoric acid as leaching agent, made the transition under the temperature conditionss described in step (1), then cooperate with Concentration, the acid solution consumption of the phosphoric acid of step (2) are matched with, the leaching efficiency of phosphoric acid can be unexpectedly lifted, valuable member is lifted The leaching rate of element, can be achieved a step, efficiently separates nickel cobalt and the purpose of iron.By the inventive method, can also coproduction it is high-quality Added in ferric phosphate, whole processing procedure without unnecessary material, material loss is small, and effect on environment is small.
In the present invention, described lateritic nickel ore is limonite type lateritic nickel ore.
At a temperature of described transition, the transition time preferably is 30min~120min.
Further preferably, the described transition time is 30~60min.
The present inventor, which overcomes existing normal temperature acid leaching process to generally believe, needs the technology prejudice of strong acid, and leaching is used as using phosphoric acid Go out agent, be matched with described transition processing and to the Collaborative Control of 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 fully react with phosphoric acid, in addition, the ferric phosphate of in-situ precipitate separates out covering too early blocks leaching Passage, and then the unreacted a large amount of residues of mineral aggregate meeting in leached mud are directly resulted in, leaching effect is poor.However, phosphoric acid concentration is too high, Corresponding H+ concentration will be high, FePO4It is difficult to a large amount of formation, more iron can be with Fe3+Form exist in solution, only exist In described preferred scope, a balance can be reached, lateritic nickel ore fully reacts with phosphoric acid, while because of H+Consumption, solution In pH just at FePO4The scope of generation is precipitated, ferric phosphate precipitation now can be just generated 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 leach metallic element theoretical molar amount in transition lateritic nickel ore 1~3 times.
Preferably, under described phosphoric acid concentration, the solid-liquid weight ratio of transition lateritic nickel ore and described phosphoric acid is 1: 3~10;More preferably 1: 10.
The temperature control of leaching process can equally influence the ferric phosphate of in-situ precipitate to the congestion situations of leaching passage, as It is preferred that, the temperature of leaching process is room temperature to 90 DEG C;It is preferred that leaching process temperature be 40~90 DEG C.
In step (2), under described phosphoric acid concentration and leaching parameter, extraction time is preferably 1~12h;It is further excellent Elect 1~3h as.
A kind of preferred method for leaching nickel cobalt from lateritic nickel ore and synchronously preparing ferric phosphate of the present invention, lateritic nickel ore leaching In 300 DEG C~400 DEG C transition processing 30min~120min before going out;Acidleach process is then carried out, during acidleach, is made with phosphoric acid For leaching agent, leached using normal pressure acid leaching process after lateritic nickel ore, 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;Phosphoric acid consumption phosphoric acid theory for needed for Gold in Ores belongs to element is used 1~3 times of amount;In the normal pressure acid leaching process, phosphoric acid concentration be 1~3mol/L, extraction temperature be room temperature to 90 DEG C, during leaching Between 1~12h.It is preferred that 40~90 DEG C of extraction temperature, 1~3h of extraction time.
A kind of scheme being more highly preferred to, by limonite type lateritic nickel ore 300 DEG C~400 DEG C transition processing 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 is 40~90 DEG C, 1~3h of extraction time;Through separation of solid and liquid after leaching process, nickel cobalt enters in solution, and iron is rich Collection is in leached mud.
Used in the present invention after above-mentioned processing, the nickel, cobalt in lateritic nickel ore enter solution and iron is converted into ferric phosphate precipitation, Realize that the nickel in lateritic nickel ore, cobalt and iron are efficiently separated.Ferric phosphate can improve this as the raw material for manufacturing ferric phosphate lithium cell etc. Invent the economic benefit produced.
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 by goethite in lateritic nickel ore, the crystal structure of goethite is destroyed during this, while increase is red The specific surface area of native nickel minerals;Coordinate the Leaching Systems of described phosphoric acid, for example phosphoric acid concentration, extraction temperature, phosphoric acid dosage Collaborative Control, can avoid because of a step in-situ precipitate and caused by leaching channel blockage, and then significantly improve nickel cobalt leaching rate;Realize One step of the valuable element in lateritic nickel ore, efficiently separate.
Beneficial effect
Compared with prior art, cooperateed with by the transition of the present invention with the coupling that phosphoric acid is leached, overcome step original position heavy Leaching channel blockage, the defect of leaching effect difference formed sediment and caused, realize condition of normal pressure next step, efficiently and selectively soak The iron nickel cobalt gone out in lateritic nickel ore.By this method, the leaching rate height of the purpose that nickel cobalt is efficiently separated with iron, nickel and cobalt is reached, The leaching rate of iron is low, good separating effect.Coproduction ferric phosphate, adds added value of product simultaneously.The inventive method is simple to operate, easily In control, with extremely strong practicality.
It is found through experiments that, using the inventive method, compared to the conventional extract technology such as existing hydrochloric acid, sulfuric acid, iron Leaching rate can drop to less than 10% by existing more than 80%, and nickel iron is leached than bringing up to more than 20 by existing 0.9~1.5. 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 is obtained is higher, and the purity of ferric phosphate may be up to more than 90%, can be applied to system The fields such as standby electrode material, ceramics.
Brief description of the drawings
Fig. 1 is the material phase analysis figure of the leached mud of embodiment 1;
Fig. 2 is the material phase analysis figure of the leached mud of embodiment 2.
Embodiment
In order to illustrate more clearly of the present invention, tests below data are enumerated, application of the invention is not implemented by following The limitation of convention mould, data.
As shown in table 1, broken, ore grinding is pre-dried to 74 μm in lateritic nickel ore by the main chemical compositions of lateritic nickel ore used Following lateritic nickel ore powder.
The liquid-solid ratio that following examples refer to, unless specified or limited otherwise, refers both to weight ratio.
The ore chemistry composition of table 1/%
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 in 3mol/L phosphoric acid solution, and liquid-solid ratio is 10: 1, 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 is leached Rate ratio is 7.87.The main chemical compositions of leached mud are as shown in table 2
The leached mud main chemical compositions of table 2/%
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, as seen from Figure 1, and leached mud thing is mutually FePO4· 2H2O。
Embodiment 2:
Lateritic nickel ore is calcined 1h at 400 DEG C, and calcining leaches 2h in 3mol/L phosphoric acid solution, and liquid-solid ratio is 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 for 10.45
Embodiment 3:
Lateritic nickel ore is calcined 1h at 400 DEG C, and calcining leaches 3h in 3mol/L phosphoric acid solution, and liquid-solid ratio is 10:1, 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 for 13.90.The main chemical compositions of leached mud are as shown in table 3
The leached mud main chemical compositions of table 3/%
The material phase analysis figure of the leached mud of the present embodiment is shown in Fig. 2, as seen from Figure 2, and leached mud thing is mutually FePO4· 2H2O。
Embodiment 4:
Lateritic nickel ore is calcined 1h at 400 DEG C, and calcining leaches 2h in 2.5mo1/L phosphoric acid solution, and liquid-solid ratio is 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 for 22.72.
Embodiment 5:
Lateritic nickel ore is calcined 1h at 400 DEG C, and calcining leaches 2h in 1mo1/L phosphoric acid solution, and liquid-solid ratio is 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 for 27.66.
Embodiment 6:
Lateritic nickel ore is calcined 1h at 400 DEG C, and calcining leaches 2h in 2mol/L phosphoric acid solution, and liquid-solid ratio is 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 for 24.20.
Embodiment 7:
Lateritic nickel ore is calcined 1h at 300 DEG C, and calcining leaches 2h in 3mol/L phosphoric acid solution, and liquid-solid ratio is 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 is leached Rate ratio is 3.98.
Comparative example 1:
Lateritic nickel ore leaches 2h in 3mol/L sulfuric acid solution, and liquid-solid ratio is 10: 1, 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 For 1.10.
Comparative example 2:
Lateritic nickel ore is calcined 1h at 400 DEG C, and 2h is then leached in 3mol/L sulfuric acid solution, and liquid-solid ratio is 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 is leached Rate ratio is 1.04.
Comparative example 3:
Lateritic nickel ore is calcined 1h at 400 DEG C, and calcining leaches 2h in 4mol/L phosphoric acid solution, and liquid-solid ratio is 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 is leached Rate ratio is 1.32
Comparative example 4
Lateritic nickel ore is calcined 1h at 500 DEG C, and calcining leaches 2h in 3mol/L phosphoric acid solution, and liquid-solid ratio is 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 is leached Rate ratio is 2.36
Comparative example 5
Lateritic nickel ore is calcined 1h at 250 DEG C, and calcining leaches 2h in 3mol/L phosphoric acid solution, and liquid-solid ratio is 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 is leached Rate ratio is 2.13.

Claims (10)

1. a kind of normal pressure phosphoric acid from lateritic nickel ore leaches nickel cobalt and the method for synchronously preparing ferric phosphate;It is characterized in that:Will be red Native nickel minerals carries out normal pressure Ore Leaching processing, then carries out separation of solid and liquid, obtains the leaching of the leached mud and concentrating cobalt and nickel of ferric phosphate Liquid;In leaching process, described acid is phosphoric acid, and phosphoric acid concentration is 1~3mol/L;Phosphoric acid dosage is leaching transition lateritic nickel ore 1~3 times of middle metallic element theoretical molar amount.
2. normal pressure phosphoric acid leaches nickel cobalt and the method for synchronously preparing ferric phosphate from lateritic nickel ore as claimed in claim 1;Its It is characterised by:Lateritic nickel ore Ore Leaching before processing makes the transition at 300 DEG C~400 DEG C in advance.
3. normal pressure phosphoric acid leaches nickel cobalt and the method for synchronously preparing ferric phosphate from lateritic nickel ore as claimed in claim 2;Its It is characterised by:The time of transition processing is 30min~120min.
4. normal pressure phosphoric acid leaches nickel cobalt and the method for synchronously preparing ferric phosphate from lateritic nickel ore as claimed in claim 1;Its It is characterised by:In leaching process, the solid-liquid weight ratio of transition lateritic nickel ore and described phosphoric acid is 1: 3~10.
5. normal pressure phosphoric acid leaches nickel cobalt and the method for synchronously preparing ferric phosphate from lateritic nickel ore as claimed in claim 1;Its It is characterised by:The temperature of leaching process is room temperature to 90 DEG C.
6. normal pressure phosphoric acid leaches nickel cobalt and the method for synchronously preparing ferric phosphate from lateritic nickel ore as claimed in claim 1;Its It is characterised by:Extraction time is 1~12h.
7. normal pressure phosphoric acid leaches nickel cobalt and the method for synchronously preparing ferric phosphate from lateritic nickel ore as claimed in claim 6;Its It is characterised by:Extraction time is 1~3h.
8. normal pressure phosphoric acid leaches nickel cobalt and the method for synchronously preparing ferric phosphate from lateritic nickel ore as claimed in claim 1;Its It is characterised by:Phosphoric acid concentration is 2.5~3mol/L.
9. normal pressure phosphoric acid leaches nickel cobalt and the method for synchronously preparing ferric phosphate from lateritic nickel ore as claimed in claim 1;Its It is characterised by:Described lateritic nickel ore is limonite type lateritic nickel ore.
10. normal pressure phosphoric acid leaches nickel cobalt and the method for synchronously preparing ferric phosphate from lateritic nickel ore as claimed in claim 9;Its It is characterised by:By limonite type lateritic nickel ore in 300 DEG C~400 DEG C transition processing 30min~120min;Then by after transition It is 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 separation of solid and liquid after leaching process, nickel cobalt enters in solution, and iron is enriched in leached mud.
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Cited By (6)

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CN107579218A (en) * 2017-08-23 2018-01-12 中国科学院过程工程研究所 A kind of method that acid leaching liquor by lateritic nickel ore directly prepares nickel cobalt aluminium ternary anode material precursor
CN109065996A (en) * 2018-08-02 2018-12-21 中南大学 A kind of waste and old nickle cobalt lithium manganate tertiary cathode material regeneration method
CN110615420A (en) * 2019-09-17 2019-12-27 北京科技大学 Method for preparing iron phosphate from laterite nickel ore leaching slag
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CN111394595A (en) * 2020-04-17 2020-07-10 中南大学 Method for extracting nickel and cobalt from phosphoric acid leaching solution 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
CN111471856A (en) * 2020-05-06 2020-07-31 中南大学 Method for one-step acid leaching of laterite-nickel ore and co-production of lithium iron phosphate positive active material
CN111471856B (en) * 2020-05-06 2021-06-22 中南大学 Method for one-step acid leaching of laterite-nickel ore and co-production of lithium iron phosphate positive active material

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