CN109385539A - A kind of laterite nickel ore hydrometallurgical method for Indonesia locality - Google Patents
A kind of laterite nickel ore hydrometallurgical method for Indonesia locality Download PDFInfo
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- CN109385539A CN109385539A CN201811174178.2A CN201811174178A CN109385539A CN 109385539 A CN109385539 A CN 109385539A CN 201811174178 A CN201811174178 A CN 201811174178A CN 109385539 A CN109385539 A CN 109385539A
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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
- C22B23/0423—Halogenated acids or salts thereof
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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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- 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
- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/20—Treatment or purification of solutions, e.g. obtained by leaching
- C22B3/26—Treatment or purification of solutions, e.g. obtained by leaching by liquid-liquid extraction using organic compounds
- C22B3/262—Treatment or purification of solutions, e.g. obtained by leaching by liquid-liquid extraction using organic compounds using alcohols or phenols
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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Abstract
The present invention relates to field of smelting, disclose a kind of laterite nickel ore hydrometallurgical method for Indonesia locality, comprising: 1) add water to be ground to ore pulp lateritic nickel ore；2) it adds hydrochloric acid and sodium chloride is leached；3) it is separated by solid-liquid separation；4) with extractant by the Ni in liquid2+、Fe2+、Cr3+Extraction and separation；5) it is passed through ozone into upper layer extractant, after separation of solid and liquid, taking precipitate is recycled extractant as major product；6) it is passed through ozone into lower aqueous solution, after separation of solid and liquid, taking precipitate is as byproduct；To the Na in lower aqueous solution+、H+、ClIt is recycled.The method of the present invention is innovated on the basis of conventional wet smelting process, abundant adaptation to local conditions, utilize the local distinctive natural resources of Indonesia, it is recycled along with being realized to most of chemical agents, not only significantly reduce manufacturing cost, entire process system is set to tend to zero-emission, and nickel content is high in product, the rate of recovery is high.
Description
Technical field
The present invention relates to field of smelting more particularly to a kind of laterite nickel ore hydrometallurgical methods for Indonesia locality.
Background technique
With the development of the global economy, the improvement of social progress and living standards of the people, the demand to stainless steel are more next
Bigger, the yield of light China stainless steel just reaches 30,000,000 tons, and market value is up to 600,000,000,000 yuans.Stainless steel it is main at
It point is nickel, secondly chromium and iron, and possess nickel, iron and chromium in lateritic nickel ore etc. valuable metals element, these valuable elements are all not
The essential elements of rust steel.Price fixing in existing market circulation, is mainly valuated with effective metal nickel, and chromium and iron
Without charge, such Stainless Steel Plant selects the ferronickel of smelting out as raw material lateritic nickel ore, production cost is greatly reduced, with other
The nickel (such as electrolytic nickel, nickel sulfate) that form is produced compares, and reduces steel mill's production cost, has stronger competition
Advantage.However liquid extraction technique selects smelting to come out valuable element nickel, iron and the chromium in lateritic nickel ore, especially the technique is produced into
This has a sharp decline than traditional handicraft, and effect on environment is minimum, therefore the product that the technique is produced is with wide
Market prospects, therefore is reduced by cost and is utilized extensively for stainless steel and actively promotes effect.
Due to the high rainfall of Indonesia, the carbon dioxide in organic acid and underground water that vegetation generates after decomposing generates comprehensive
Reaction is closed, production has nickel minerals abundant.Lateritic nickel ore and other nickel oxide ores are one very important parts of world's nickel reserves.
Nickel oxide ore is mainly by after Lateritic Soil mafelsic rock weathering and Chemical concentration as a result, the silica and rock that weathering is dissolved
In metallic element generate limonite and silicic acid nickel ores.From lateritic nickel ore to ferronickel or the smelting of other commodity position nickel iron compounds
Refining mode is broadly divided into pyrometallurgical smelting and hydrometallurgy, and thermal process is with mineral element principle with different melting points, by mineral
High-temperature calcination is carried out, the grade of nickel is improved, but there is the defect of high energy consumption maximum discharge.It is most of at present for hydrometallurgy
The disadvantages such as wet processing all has scale of investment huge, and risk factor is high, and technique threshold is high and the rate of recovery is low.
It is archipelagic country in view of above market background and Indonesia, mining area is far away from a noisy area, scarcity of resources, and traffic falls behind,
There is bottleneck in part material supply, and local government is tighter for environmental regulatory control, therefore external environment is very harsh, opens in locality
Exhibition hydrometallurgy brings huge difficulty, it is therefore necessary to which adaptation to local conditions carries out the innovation of a wet method smelting process.
Summary of the invention
In order to solve the above-mentioned technical problems, the present invention provides a kind of laterite nickel ore hydrometallurgical sides for Indonesia locality
Method, the method for the present invention are innovated on the basis of conventional wet smelting process, and abundant adaptation to local conditions is peculiar using Indonesia locality
Natural resources, along with to most of chemical agents realization recycle, not only significantly reduce manufacturing cost, make entire work
Process system tends to zero-emission, and nickel content is high in product, and the rate of recovery is high.
The specific technical proposal of the invention is: a kind of laterite nickel ore hydrometallurgical method for Indonesia locality, including with
Lower step:
1) add water to be ground to ore pulp lateritic nickel ore, sufficiently crush the silicon magnesium package of cracking nickel.
2) hydrochloric acid and sodium chloride are added into ore pulp and carries out Leach reaction under stiring, and metal is released in the form of an ion
It puts.
3) it is separated by solid-liquid separation, is dissolved in metal in liquid in the form of an ion, to the solid raw ore based on silica, water
Reach discharge standard after washing and carries out embankment and second ploughing again.
4) with extractant by the Ni in liquid2+、Fe2+、Cr3+Extraction and separation；It is mainly contained in the extractant of upper layer after separation
Ni2+、Fe2+、Cr3+；There is Na in lower aqueous solution+、Mg2+、C1-、H +Plasma.
5) it is passed through ozone into upper layer extractant, following reaction occurs:
Ni2++Fe2++Cr3++O3→NiO↓+Fe3O4↓+Cr2O3↓+ extractant, after separation of solid and liquid, taking precipitate as major product,
Extractant is recycled.
6) it is passed through ozone into lower aqueous solution, following reaction occurs:
Na++Cl-+Mg2++H++O3→MgO↓+Na++Cl-+H++H2O, after separation of solid and liquid, taking precipitate is as byproduct；To lower layer
Na in aqueous solution+、H+、Cl?It is recycled.
The invention has the following advantages that
1, as described in the background art, since Indonesia is archipelagic country, mining area is far away from a noisy area, scarcity of resources, and traffic falls behind, many
There is bottleneck in raw material supply, and local government is again relatively tight for environmental regulatory control, therefore external environment is very harsh, carries out in locality
Hydrometallurgy brings huge difficulty.For this purpose, the present invention reforms wet method smelting process: on the one hand, the present invention exists
Required raw material can be recycled in all smelting processes；On the other hand, under Indonesia's harsh environment, ingeniously
Indonesia's locality seawater resources condition abundant is made full use of wonderfully, it is (extra large as one of Primary Chemical is smelted using sodium chloride
Sodium chloride content ≈ 4% in water), in the present invention, sodium chloride can leach the effect for efficiently separating nickel, chromium ion.Not only solve
Raw material supply bottleneck and control problem, while zero-emission is realized substantially, it can protect local ecosystem environment, very greatly
Cost is reduced in degree, also solves the backward influence to this project of traffic.
2, on technology path, the present invention sufficiently combines process exploitation, theory analysis and engineering design with application.?
Deep theory analysis is carried out on the basis of Experience Design, changes design using theoretical analysis result, in sufficient design and analysis base
It development type and is debugged and is tested on plinth, and be further improved based on experimental result and design and verify design and analysis side
Method finally develops energy-efficient laterite nickel ore hydrometallurgical technique.After testing, nickel content is in the lateritic nickel ore of Indonesia locality
1.46%, content of magnesia 25%.In the major product (nickel, iron, chromium mixture) obtained by the method for the invention, the content of nickel can
Up to 5.81%, the rate of recovery of nickel effective content in 97% or more, byproduct magnesia reaches 98^% or more, and the rate of recovery of magnesia exists
80.36% or more, compared with prior art, achieve significant progress.
3, the main valuable constituent of stainless steel is nickel, iron, chromium, and every kind of ingredient requires cost.In order in stainless steel field
In there is competitiveness, the present invention is reducing production cost simultaneously, and emphasis considers to reduce stainless steel enterprises production cost, therefore this hair
The valuable elements such as the bright nickel by lateritic nickel ore, iron, chromium, while smelting being selected to come out.While selling nickel, other valuable elements
Iron and chromium have given stainless steel enterprises in the form of without charge, so that stainless steel enterprises is greatly reduced cost, therefore the present invention is ground
The product orientation of hair is nickel, iron, chromium mixture, nickel content >=4%.
Preferably, the solid that granularity crosses 325 mesh in grinding gained ore pulp accounts for 90% or more in step 1).
Team of the present invention finds in the course of the research, needs for material particle size in ore pulp to be ground in above range, ability
It enough fully ensures that nickel is not wrapped up by silicon magnesium, is conducive to the progress of subsequent extraction.
Preferably, in step 1), detailed process are as follows: weigh lateritic nickel ore, add water to be placed in ore separators and mix voluntarily mistake
Three sections of filter, grinding machine ball millings, obtain ore pulp.
Above-mentioned grinding technics can sufficiently crush the silicon magnesium package of cracking nickel, be conducive to the progress of subsequent extraction.
Preferably, the mass ratio of lateritic nickel ore and water is 100:300-400 in step 1).
Preferably, in step 2, the mass ratio 80-120:45-55:100 of hydrochloric acid, sodium chloride and lateritic nickel ore.
Preferably, in step 2, extraction time 50-70min.
Preferably, the extractant is methanol in step 4).
Preferably, the mass ratio of extractant and liquid is 0.4-0.6:1 in step 4).
Preferably, in step 4), extraction process are as follows: liquid is evacuated in reaction kettle, extractant is added, stir 20-
40min is separated after precipitating 20-30min.
It is compared with the prior art, the beneficial effects of the present invention are:
1, the method for the present invention is innovated on the basis of conventional wet smelting process, abundant adaptation to local conditions, utilizes Indonesia locality
Distinctive natural resources not only significantly reduces manufacturing cost, makes whole along with recycling to the realization of most of chemical agents
A process system tends to zero-emission, and nickel content is high in product, and the rate of recovery is high.
2, major product Ni content >=4% produced using wet method smelting process of the present invention, Ni content can be high with optimal conditions
Up to 5.81% or more, the rate of recovery of nickel is 97% or more.Effective content reaches 98^% or more, the recycling of magnesia in byproduct magnesia
Rate is 80.36% or more, compared with prior art, achieves significant progress.
Specific embodiment
The present invention will be further described with reference to the examples below.
Total embodiment
A kind of laterite nickel ore hydrometallurgical method for Indonesia locality, comprising the following steps:
1) 100 parts of lateritic nickel ore are weighed, adds 300-400 parts of water to be placed in ore separators and mixes voluntarily three sections of filtering, grinding machine ball millings, fill
Point crush cracking nickel silicon magnesium package, obtain granularity cross 325 mesh solid account for 90% or more ore pulp.
2) 80-120 parts of hydrochloric acid and 45-55 parts of sodium chloride are added into ore pulp and carry out Leach reaction 50- under stiring
70min discharges metal in the form of an ion.
3) it is separated by solid-liquid separation, is dissolved in metal in liquid in the form of an ion, to the solid raw ore based on silica, water
Reach discharge standard after washing and carries out embankment and second ploughing again.
4) liquid is evacuated to addition extractant methanol in reaction kettle, stirs 20-40min, divided after precipitating 20-30min
From by the Ni in liquid2+、Fe2+、Cr3+The mass ratio of extraction and separation, extractant and liquid is 0.4-0.6:1.Upper layer after separation
Ni is mainly contained in extractant2+、Fe2+、Cr3+；There is Na in lower aqueous solution+、Mg2+、C1-、H +Plasma.
5) it is passed through ozone into upper layer extractant, following reaction occurs:
Ni2++Fe2++Cr3++O3→NiO↓+Fe3O4↓+Cr2O3↓+ extractant, after separation of solid and liquid, taking precipitate as major product,
Extractant is recycled.
6) it is passed through ozone into lower aqueous solution, following reaction occurs:
Na++Cl-+Mg2++H++O3→MgO↓+Na++Cl-+H++H2O, after separation of solid and liquid, taking precipitate is as byproduct；To lower layer
Na in aqueous solution+、H+、Cl?It is recycled.
Embodiment 1
(1) 1000kg raw ore is weighed, water 3500kg is added, is placed in ore separators and mixes voluntarily three sections of filtering, grinding machine ball millings, become mine
90% or more ore pulp is accounted at 325 mesh.
(2) by ore pulp be placed in reaction kettle be added 100kg HCl and 50kg NaCl, leaching 1 hour.
(3) ore pulp for completing to leach is separated by solid-liquid separation, takes leachate, by solid portion by reaching discharge after washing
Standard carries out embankment second ploughing.
(4) liquid is extracted into reaction kettle and methanol extraction agent is added in the ratio of 1:0.5, after stirring half an hour waits, precipitating
Half an hour is separated.
(5) it is passed through ozone in the extractant of upper layer and becomes oxide precipitate after nickel, iron, chromium ion production reaction, consolidate
Liquid separation, solid are recycled as major product, extractant.
(6) ozone is added in lower aqueous solution, so that magnesium ion is become magnesium oxide precipitation object, be separated by solid-liquid separation, obtains pair
Product contains Na in aqueous solution+、H+、C1-, it is recycled.
In conclusion lateritic nickel ore 1000kg, nickel content 1.46%, content of magnesia 25%.Extracted by wet-leaching
The techniques such as take, aoxidize, precipitating, separating obtain major product (nickel, iron, chromium mixture) fine powder 243.7kg.Wherein, the content of nickel is
5.81%, magnesia 205kg.
The rate of recovery of nickel:
Effective nickel is 1000kg × 1.46%=14.6kg in 1000kg lateritic nickel ore；
Effective nickel is 243.7 kg × 5.81%=14.16kg in product；
The rate of recovery is 14.16kg/14.6kg × 100=97%；
The efficient oxidation magnesium in lateritic nickel ore are as follows: 1000kg × 25%=250kg, obtaining product containing 98% magnesia is 205kg, is produced
The efficient oxidation magnesium is 205kg × 98%=200.9kg in product, and the magnesia rate of recovery is 200.9kg/250kg × 100=80.36%.
Embodiment 2
A kind of laterite nickel ore hydrometallurgical method for Indonesia locality, comprising the following steps:
1) 100 parts of lateritic nickel ore are weighed, adds 300 parts of water to be placed in ore separators and mixes voluntarily three sections of filtering, grinding machine ball millings, abundant powder
The silicon magnesium of fragmentation solution nickel wraps up, obtain granularity cross 325 mesh solid account for 90% or more ore pulp.
2) 80 parts of hydrochloric acid and 45 parts of sodium chloride are added into ore pulp and carry out Leach reaction 70min under stiring, by metal
It discharges in the form of an ion.
3) it is separated by solid-liquid separation, is dissolved in metal in liquid in the form of an ion, to the solid raw ore based on silica, water
Reach discharge standard after washing and carries out embankment and second ploughing again.
4) liquid is evacuated to addition extractant methanol in reaction kettle, stirs 20min, separated after precipitating 20min, by liquid
Ni in body2+、Fe2+、Cr3+The mass ratio of extraction and separation, extractant and liquid is 0.6:1.It is main in the extractant of upper layer after separation
Contain Ni2+、Fe2+、Cr3+；There is Na in lower aqueous solution+、Mg2+、C1-、H +Plasma.
5) it is passed through ozone into upper layer extractant, following reaction occurs:
Ni2++Fe2++Cr3++O3→NiO↓+Fe3O4↓+Cr2O3↓+ extractant, after separation of solid and liquid, taking precipitate as major product,
Extractant is recycled.
6) it is passed through ozone into lower aqueous solution, following reaction occurs:
Na++Cl-+Mg2++H++O3→MgO↓+Na++Cl-+H++H2O, after separation of solid and liquid, taking precipitate is as byproduct；To lower layer
Na in aqueous solution+、H+、Cl?It is recycled.
Embodiment 3
A kind of laterite nickel ore hydrometallurgical method for Indonesia locality, comprising the following steps:
1) 100 parts of lateritic nickel ore are weighed, adds 400 parts of water to be placed in ore separators and mixes voluntarily three sections of filtering, grinding machine ball millings, abundant powder
The silicon magnesium of fragmentation solution nickel wraps up, obtain granularity cross 325 mesh solid account for 90% or more ore pulp.
2) 120 parts of hydrochloric acid and 55 parts of sodium chloride are added into ore pulp and carry out Leach reaction 50min under stiring, by metal
It discharges in the form of an ion.
3) it is separated by solid-liquid separation, is dissolved in metal in liquid in the form of an ion, to the solid raw ore based on silica, water
Reach discharge standard after washing and carries out embankment and second ploughing again.
4) liquid is evacuated to addition extractant methanol in reaction kettle, stirs 40min, separated after precipitating 30min, by liquid
Ni in body2+、Fe2+、Cr3+The mass ratio of extraction and separation, extractant and liquid is 0.4:1.It is main in the extractant of upper layer after separation
Contain Ni2+、Fe2+、Cr3+；There is Na in lower aqueous solution+、Mg2+、C1-、H +Plasma.
5) it is passed through ozone into upper layer extractant, following reaction occurs:
Ni2++Fe2++Cr3++O3→NiO↓+Fe3O4↓+Cr2O3↓+ extractant, after separation of solid and liquid, taking precipitate as major product,
Extractant is recycled.
6) it is passed through ozone into lower aqueous solution, following reaction occurs:
Na++Cl-+Mg2++H++O3→MgO↓+Na++Cl-+H++H2O, after separation of solid and liquid, taking precipitate is as byproduct；To lower layer
Na in aqueous solution+、H+、Cl?It is recycled.
Raw materials used in the present invention, equipment is unless otherwise noted the common raw material, equipment of this field；In the present invention
Method therefor is unless otherwise noted the conventional method of this field.
The above is only presently preferred embodiments of the present invention, is not intended to limit the invention in any way, it is all according to the present invention
Technical spirit any simple modification, change and equivalent transformation to the above embodiments, still fall within the technology of the present invention side
The protection scope of case.
Claims (9)
1. a kind of laterite nickel ore hydrometallurgical method for Indonesia locality, it is characterised in that the following steps are included:
1) add water to be ground to ore pulp lateritic nickel ore, sufficiently crush the silicon magnesium package of cracking nickel；
2) hydrochloric acid and sodium chloride are added into ore pulp and carries out Leach reaction under stiring, and metal is discharged in the form of an ion；
3) it is separated by solid-liquid separation, is dissolved in metal in liquid in the form of an ion, to the solid raw ore based on silica, after washing
Reach discharge standard and carries out embankment and second ploughing again；
4) with extractant by the Ni in liquid2+、Fe2+、Cr3+Extraction and separation；Ni is mainly contained in the extractant of upper layer after separation2+、
Fe2+、Cr3+；There is Na in lower aqueous solution+、Mg2+、C1-、H +Plasma；
5) it is passed through ozone into upper layer extractant, following reaction occurs:
Ni2++Fe2++Cr3++O3→NiO↓+Fe3O4↓+Cr2O3↓+ extractant, after separation of solid and liquid, taking precipitate as major product,
Extractant is recycled；
6) it is passed through ozone into lower aqueous solution, following reaction occurs:
Na++Cl-+Mg2++H++O3→MgO↓+Na++Cl-+H++H2O, after separation of solid and liquid, taking precipitate is as byproduct；To lower layer
Na in aqueous solution+、H+、Cl?It is recycled.
2. a kind of laterite nickel ore hydrometallurgical method for Indonesia locality as described in claim 1, which is characterized in that step
1) in, the solid that granularity crosses 325 mesh in grinding gained ore pulp accounts for 90% or more.
3. a kind of laterite nickel ore hydrometallurgical method for Indonesia locality as claimed in claim 1 or 2, which is characterized in that
In step 1), detailed process are as follows: weigh lateritic nickel ore, add water to be placed in ore separators and mix voluntarily three sections of filtering, grinding machine ball millings, obtain
To ore pulp.
4. a kind of laterite nickel ore hydrometallurgical method for Indonesia locality as claimed in claim 1 or 2, which is characterized in that
In step 1), the mass ratio of lateritic nickel ore and water is 100:300-400.
5. a kind of laterite nickel ore hydrometallurgical method for Indonesia locality as described in claim 1, which is characterized in that step
2) in, the mass ratio 80-120:45-55:100 of hydrochloric acid, sodium chloride and lateritic nickel ore.
6. a kind of laterite nickel ore hydrometallurgical method for Indonesia locality as claimed in claim 1 or 5, which is characterized in that
In step 2, extraction time 50-70min.
7. a kind of laterite nickel ore hydrometallurgical method for Indonesia locality as described in claim 1, which is characterized in that step
4) in, the extractant is methanol.
8. a kind of laterite nickel ore hydrometallurgical method for Indonesia locality as claimed in claim 1 or 7, which is characterized in that
In step 4), the mass ratio of extractant and liquid is 0.4-0.6:1.
9. a kind of laterite nickel ore hydrometallurgical method for Indonesia locality as claimed in claim 1 or 7, which is characterized in that
In step 4), extraction process are as follows: liquid is evacuated in reaction kettle, extractant is added, stir 20-40min, after precipitating 20-30min
It is separated.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007106969A1 (en) * | 2006-03-17 | 2007-09-27 | Nichromet Extraction Inc. | Process for recovering value metal species from laterite-type feedstock |
| CN101338375A (en) * | 2008-08-15 | 2009-01-07 | 中南大学 | Technological process for extracting nickel and cobalt and comprehensively developing iron and magnesium from laterite-nickel ore |
| CN102994746A (en) * | 2012-11-21 | 2013-03-27 | 广西藤县雅照钛白有限公司 | Method for producing nickel sulfide ore concentrate by use of industrial waste acid |
| CN104561540A (en) * | 2015-01-07 | 2015-04-29 | 中国科学院过程工程研究所 | Method for selectively leaching serpentine type laterite-nickel ores by utilizing hydrochloric acid |
-
2018
- 2018-10-09 CN CN201811174178.2A patent/CN109385539A/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007106969A1 (en) * | 2006-03-17 | 2007-09-27 | Nichromet Extraction Inc. | Process for recovering value metal species from laterite-type feedstock |
| CN101338375A (en) * | 2008-08-15 | 2009-01-07 | 中南大学 | Technological process for extracting nickel and cobalt and comprehensively developing iron and magnesium from laterite-nickel ore |
| CN102994746A (en) * | 2012-11-21 | 2013-03-27 | 广西藤县雅照钛白有限公司 | Method for producing nickel sulfide ore concentrate by use of industrial waste acid |
| CN104561540A (en) * | 2015-01-07 | 2015-04-29 | 中国科学院过程工程研究所 | Method for selectively leaching serpentine type laterite-nickel ores by utilizing hydrochloric acid |
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