CN106086468B - A kind of method and system extracting nickel oxide using ferronickel powder - Google Patents
A kind of method and system extracting nickel oxide using ferronickel powder Download PDFInfo
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- CN106086468B CN106086468B CN201610650312.6A CN201610650312A CN106086468B CN 106086468 B CN106086468 B CN 106086468B CN 201610650312 A CN201610650312 A CN 201610650312A CN 106086468 B CN106086468 B CN 106086468B
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- ferronickel
- nickel
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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
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G53/00—Compounds of nickel
- C01G53/04—Oxides; Hydroxides
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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
Abstract
The present invention discloses a kind of method and system for extracting nickel oxide using ferronickel powder.It the described method comprises the following steps：(1) ferronickel fine powder is selectively oxidized roasting, obtains product of roasting；(2) product of roasting is subjected to ammonia leaching ammonia still process calcination processing and obtains nickel oxide product.The system comprises selective oxidation calciners and ammonia to soak ammonia still process calciner plant.Using the present invention can efficiently use ferronickel powder by wet processing extract to obtain high-purity nickel oxide (>99%), to while improving ferronickel powder utility value reduce nickel production cost, whole flow process nickel recovery height (>95%).
Description
Technical field
It extracts field more particularly to a kind of method using ferronickel powder extraction nickel oxide the invention belongs to non-ferrous metal and is
System.
Background technology
In recent years, with the fast development of the exhausted and domestic stainless steel industry of high-grade nickel sulfide ore, low-grade laterite
Nickel minerals has become the primary raw material of production ferro-nickel product.Wet-treating lateritic nickel ore starts from the 1940s, using earliest
Be ammonia soaking technology, this technique is by Caron teaching inventives, so also known as Caron techniques.The basic procedure of the technique is
Reduction roasting-ammonia leaching, the purpose of reduction roasting are that silicic acid nickel and nickel oxide in lateritic nickel ore is made to be reduced into metal to the maximum extent,
The condition for controlling reduction simultaneously, makes most of iron be reduced into Fe3O4, only small part is reduced into metallic iron, and calcining uses NH again3And
CO2Convert metallic nickel and cobalt to nickel ammonia and cobalt ammonia complex enter solution, meanwhile, metallic iron can also generate iron ammino-complex into
Enter solution, then oxidized, hydrolysis generates ferric hydroxide precipitate and separated with ammonia leaching solution, and ammonia leaching solution obtains alkali formula carbon using ammonia still process
Sour nickel, then calcining obtain NiO.NiO can be used as product to sell, and can also obtain metallic nickel by hydrogen reduction.The technique
The disadvantage is that nickel recovery is low, the reason is that when restoring lateritic nickel ore, it is ensured that iron it is few as possible be reduced into metallic state, due to iron
Restoring the aggregation to nickel and growing up has facilitation, so the control of this step can cause the loss of a large amount of nickel, leads to whole technique
Nickel recovery it is low (nickel recovery is generally below 75%).Up to the present, the whole world only several factories use the method
Handle lateritic nickel ore, three during the last ten years few new plants use ammonia soaking technology.
Pyrogenic attack lateritic nickel ore is current prevailing technology, and wherein reduction roasting-mill ore magnetic selection has become research
Hot spot.Using lateritic nickel ore as raw material, coal dust is reducing agent, under the high temperature conditions that the nickel in ore is complete using direct reduction equipment
Portion is reduced into metallic nickel, and iron makes nickel be enriched in ferronickel powder according to mixed carbon comtent partial reduction at metallic iron, then through magnetic separation separation.Mesh
Preceding to ferronickel powder, there are no large-scale commercial Applications, study it and also only reside within using its briquetting as the original of pneumatic steelmaking
Material is obtained using molten point of processing in the level after dilval as the raw material of smelting stainless steel, and value-added content of product is not
It is high.If carrying nickel using ammonia soaking technology processing ferronickel powder, it is different from the reduced calcine of Caron techniques, the iron in ferronickel powder is almost
All exist in the form of metallic iron, leaching process can consume a large amount of ammonia leaching agent, difficulty is brought to the leaching of nickel.
Ferronickel powder treatment technology is further improved as a result,.
Invention content
The present invention is directed to solve at least some of the technical problems in related technologies.For this purpose, the present invention
One purpose is to propose that a kind of method and system extracting nickel oxide using ferronickel powder, this method can efficiently use ferronickel powder
By wet processing extract to obtain high-purity nickel oxide (>99%), to be reduced while improving ferronickel powder utility value
The production cost of nickel, the nickel recovery of whole flow process is up to 95% or more.
In one aspect of the invention, the present invention proposes a kind of method for extracting nickel oxide using ferronickel powder, according to this
Inventive embodiments, this method include：
(1) ferronickel fine powder is selectively oxidized roasting, obtains product of roasting；
(2) product of roasting is subjected to ammonia leaching-ammonia still process-calcination processing and obtains nickel oxide product.
In addition, it is according to the above embodiment of the present invention using dilval extract nickel oxide method can also have it is as follows
Additional technical characteristic：
If waiting for, the granularity of the ferronickel powder of selective oxidizing roasting is excessively coarse, is unfavorable for the progress of oxidation reaction, at this point,
The present invention need to carry out fine grinding to ferronickel powder, obtain the ferronickel fine powder before step (1).
Specifically, grain size≤150 micron of the ferronickel fine powder.
Further, grain size≤50 micron of the ferronickel fine powder.
In some embodiments of the invention, in the ferronickel fine powder iron content be 50~90wt%, nickel content be 4~
10wt%.
In some embodiments of the invention, in step (1), it is by the temperature control that the selective oxidation roasts
300-500 DEG C, oxygen concentration is calculated as 0.5%-2%, roasting time 5-20min so that in product of roasting by percent by volume
Metallic iron mass content is less than 5%, and the ratio that metallic nickel accounts for full nickel is more than 95%.
In another aspect of the present invention, the present invention proposes a kind of system for extracting nickel oxide using ferronickel powder, according to
The embodiment of the present invention, the system include：Including selective oxidation calciner and ammonia leaching-ammonia still process-calciner plant；Wherein,
The selective oxidation calciner has ferronickel fine powder entrance, oxidizing gas entrance and product of roasting outlet；
There is the ammonia leaching-ammonia still process-calciner plant product of roasting entrance and nickel oxide to export, the product of roasting entrance and
The product of roasting outlet is connected.
When enter selective oxidation calciner ferronickel fine powder granularity it is excessively coarse, then be unfavorable for oxidation reaction into
Row, at this point, the invention also includes fine grinding device, there is the fine grinding device ferronickel powder entrance and ferronickel fine powder to export, the nickel
The outlet of iron fine powder is connected with the ferronickel fine powder entrance.Ferronickel powder is carried out fine grinding by fine grinding device, obtains the ferronickel fine powder, nickel
Grain size≤150 micron of iron fine powder, preferably grain size≤50 micron of ferronickel fine powder.
Ammonia leaching-ammonia still process-the calciner plant further includes magnetic tailings outlet, and magnetic tailings outlet connection ironmaking system enters
Mouthful, magnetic tailings can be sent to after magnetic separation as ironmaking system, as raw material.
The method and system according to the ... of the embodiment of the present invention that nickel oxide is extracted using ferronickel powder as a result, can efficiently use
Ferronickel powder extract to obtain by wet processing high-purity nickel oxide (>99%), to improve the same of ferronickel powder utility value
When reduce the production cost of nickel, the nickel recovery of whole flow process it is high (>95%).
The additional aspect and advantage of the present invention will be set forth in part in the description, and will partly become from the following description
Obviously, or practice through the invention is recognized.
Description of the drawings
Fig. 1 is the method flow schematic diagram according to an embodiment of the invention that nickel oxide is extracted using ferronickel powder；
Fig. 2 is the system structure diagram according to an embodiment of the invention that nickel oxide is extracted using ferronickel powder.
Specific implementation mode
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to for explaining the present invention, and is not considered as limiting the invention.
In the description of the present invention, it is to be understood that, term "center", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside", " up time
The orientation or positional relationship of the instructions such as needle ", " counterclockwise ", " axial direction ", " radial direction ", " circumferential direction " be orientation based on ... shown in the drawings or
Position relationship is merely for convenience of description of the present invention and simplification of the description, and does not indicate or imply the indicated device or element must
There must be specific orientation, with specific azimuth configuration and operation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are used for description purposes only, it is not understood to indicate or imply relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include at least one this feature.In the description of the present invention, the meaning of " plurality " is at least two, such as two, three
It is a etc., unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；Can be that machinery connects
It connects, can also be electrical connection；It can be directly connected, can also can be indirectly connected through an intermediary in two elements
The interaction relationship of the connection in portion or two elements, unless otherwise restricted clearly.For those of ordinary skill in the art
For, the specific meanings of the above terms in the present invention can be understood according to specific conditions.
In the present invention unless specifically defined or limited otherwise, fisrt feature can be with "above" or "below" second feature
It is that the first and second features are in direct contact or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature be directly above or diagonally above the second feature, or be merely representative of
Fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be
One feature is directly under or diagonally below the second feature, or is merely representative of fisrt feature level height and is less than second feature.
In one aspect of the invention, the present invention proposes a kind of method for extracting nickel oxide using ferronickel powder.According to this
The embodiment of invention, this method include：(1) ferronickel fine powder is selectively oxidized roasting, obtains product of roasting；It (2) will roasting
It burns product progress ammonia leaching-ammonia still process-calcination processing and obtains nickel oxide product.
Inventor has found that the iron in ferronickel powder mainly exists with metallic state, and metallic iron can subsequently be not suitable for straight with ammonia reaction
The leaching of row ammonia is tapped into, and metallic iron is converted to Fe3O4After would not consume ammonia.Then, it first handles ferronickel powder fine grinding to obtain ferronickel
Fine powder, by iron selective oxidation at Fe after being then selectively oxidized ferronickel fine powder3O4, nickel does not aoxidize, to be roasted
Product；Product of roasting is finally obtained into nickel oxide product using ammonia leaching-ammonia still process-calcine technology of existing maturation.With the prior art
Compare, can efficiently use ferronickel powder by wet processing extract to obtain high-purity nickel oxide (>99%), to improve nickel
Reduce the production cost of nickel while iron powder utility value, the nickel recovery of whole flow process it is high (>95%).
Inventor has found that the iron in ferronickel powder mainly exists with metallic state, and metallic iron can subsequently be not suitable for straight with ammonia reaction
The leaching of row ammonia is tapped into, and metallic iron is converted to Fe3O4After would not consume ammonia.Then, it first handles ferronickel powder fine grinding to obtain ferronickel
Fine powder, by iron selective oxidation at Fe after being then selectively oxidized ferronickel fine powder3O4, nickel does not aoxidize, to be roasted
Product；Product of roasting is finally obtained into nickel oxide product using ammonia leaching-ammonia still process-calcine technology of existing maturation.With the prior art
Compare, can efficiently use ferronickel powder by wet processing extract to obtain high-purity nickel oxide (>99%), to improve nickel
Reduce the production cost of nickel while iron powder utility value, the nickel recovery of whole flow process it is high (>95%).
The method for extracting nickel oxide using ferronickel powder of the embodiment of the present invention is described in detail below with reference to Fig. 1.Root
According to the embodiment of the present invention, this method includes：
S100：Ferronickel powder is subjected to fine grinding processing.
According to an embodiment of the invention, ferronickel powder is subjected to fine grinding processing, so as to obtain ferronickel fine powder.Invention human hair
It is existing, by carrying out fine grinding processing to ferronickel powder, the contact area of itself and oxidizing gas can be significantly improved, and may be implemented
To the physically activated of ferronickel powder, to significantly improve selective oxidation roasting effect.
According to one embodiment of present invention, the middle nickel of ferronickel powder and the concrete content of iron are not particularly restricted, ability
Field technique personnel can select according to actual needs, and according to a particular embodiment of the invention, nickel content can be in ferronickel powder
For 4~10wt%, iron content can be 50~90wt%.Inventor has found, high-purity in order to obtain in existing preparation process
Nickel oxide, it usually needs the higher copper nickel of nickel content is used, causes raw material production cost higher, is not easy to purchase, and it is of the invention
Relatively low to nickel grade requirement threshold in raw material, although the grade of nickel is relatively low in ferronickel powder, method using the present invention still may be used
The nickel oxide (nickel oxide content is higher than 99% or more) of high-purity is prepared, to be reduced while widening raw material sources
The production cost of nickel oxide.
According to still a further embodiment, the grain size of ferronickel fine powder is not particularly restricted, those skilled in the art
It can be selected according to actual needs, according to a particular embodiment of the invention, the grain size of ferronickel fine powder can be not higher than 150
Micron, more preferably no higher than 50 microns.Inventor has found that the ferronickel fine powder activity of the particle size range is higher, and in selective oxygen
It is larger with oxidizing gas contact area in change roasting process, so as to significantly improve selective oxidation roasting effect.
According to still another embodiment of the invention, ferronickel powder can be obtained by restoring lateritic nickel ore.Specifically, first will
Lateritic nickel ore, reduction coal and additive carry out mixed pelletizing, obtain mixing pelletizing, then in rotary kiln or turn the mixing pelletizing
Reduction treatment is carried out in the stove of bottom, obtains metallized pellet, and above-mentioned gained metallized pellet is then subjected to water quenching-ore grinding-magnetic separation
Processing, so as to obtain ferronickel powder.Inventor has found, using lateritic nickel ore as the raw material for preparing ferronickel powder, although laterite
The grade of nickel is relatively low in nickel minerals, but the nickel oxide of high-purity can be still prepared in method using the present invention that (nickel oxide contains
Amount is higher than 99% or more), to reduce the production cost of nickel oxide while widening raw material sources.
Certainly, if being selectively oxidized, ferronickel powder particles used by roasting are smaller, meet selective oxidation roasting
It is required that then can be omitted above-mentioned by ferronickel powder progress fine grinding processing step.
S200：Ferronickel powder is selectively oxidized roasting.
According to an embodiment of the invention, ferronickel fine powder is selectively oxidized roasting, so as to obtain product of roasting.
Inventor has found, using the iron characteristic different to the affinity of oxygen with nickel, being selectively oxidized roasting to ferronickel fine powder can be with
Iron is set to be oxidized to Fe3O4, and nickel is not oxidized, and during subsequent ammonia soaks, Fe3O4Ammonia of getting along well reacts, and is thus greatly decreased
The consumption of ammonia.It should be noted that those skilled in the art can according to actual needs carry out selective oxidation roasting condition
Selection.According to an embodiment of the invention, the temperature control selective oxidation roasted is 300-500 DEG C, and oxygen concentration is pressed
Percent by volume is calculated as 0.5%-2%, roasting time 5-20min so that metallic iron mass content is less than in product of roasting
5%, the ratio that metallic nickel accounts for full nickel is more than 95%, thus, it is possible to ensure that iron is oxidized to Fe3O4, and nickel is not oxidized.
S300：Product of roasting is subjected to ammonia leaching-ammonia still process-calcination processing.
According to an embodiment of the invention, product of roasting is subjected to ammonia leaching-ammonia still process-calcination processing, so as to be aoxidized
Nickel product and magnetic tailings.In the step, specifically, will be leached in product of roasting again ammonia-sal volatile first, while to molten
It is blown into oxidizing gas in liquid, makes the nickel in product of roasting that complex reaction occur with ammonia and generates nickel ammine Ni (NH3)6 2+And
Into solution, iron and gangue then stay in magnetic leached mud, and ammonia still process operation, output basic carbonate nickel are carried out after leaching
(OH)2·NiCO3, finally nickel oxide NiO products are obtained by calcining.It should be noted that those skilled in the art can basis
Actual needs selects ammonia leaching-ammonia still process-calcination condition.
It is logical can to efficiently use ferronickel powder for the method according to the ... of the embodiment of the present invention for extracting nickel oxide using ferronickel powder as a result,
Cross wet processing extract to obtain high-purity nickel oxide (>99%), to reduce nickel while improving ferronickel powder utility value
Production cost, the nickel recovery of whole flow process it is high (>95%).
In another aspect of the present invention, the present invention proposes a kind of system for extracting nickel oxide using ferronickel powder.According to
The embodiment of the present invention, the system include：There is ferronickel powder entrance and ferronickel fine powder to export for fine grinding device, the fine grinding device,
And suitable for the ferronickel powder is carried out fine grinding processing, to obtain ferronickel fine powder；Selective oxidation calciner, the selectivity
Oxidizing roasting device have ferronickel fine powder entrance, oxidizing gas entrance and product of roasting outlet, the ferronickel fine powder entrance and
The ferronickel fine powder outlet is connected, and suitable for the ferronickel fine powder is selectively oxidized roasting, to obtain product of roasting；
There is product of roasting entrance and nickel oxide to export for ammonia leaching-ammonia still process-calciner plant, the ammonia leaching-ammonia still process-calciner plant, the roasting
It burns product inlet with product of roasting outlet to be connected, and suitable for the product of roasting is carried out ammonia leaching, ammonia still process and calcination processing,
To obtain nickel oxide product.
It should be noted that in system of the present invention using ferronickel powder extraction nickel oxide, fine grinding device, which is not essential, to be set
It is standby, only when enter selective oxidation calciner ferronickel fine powder granularity it is excessively coarse, be unfavorable for the progress of oxidation reaction
When just need.
Compared with prior art, can efficiently use ferronickel powder by wet processing extract to obtain high-purity nickel oxide (>
99%), to while improving ferronickel powder utility value reduce nickel production cost, whole flow process nickel recovery height (>
95%).
Below with reference to Fig. 2, the system for extracting nickel oxide using ferronickel powder of the embodiment of the present invention is carried out in conjunction with Fig. 2 detailed
Description.In the present embodiment, which includes：
Fine grinding device 100：According to an embodiment of the invention, fine grinding device 100 has ferronickel powder entrance 101 and ferronickel fine powder
Outlet 102, and suitable for ferronickel powder is carried out fine grinding processing, so as to obtain ferronickel fine powder.Inventor has found, by ferronickel
Powder carries out fine grinding processing, can significantly improve the contact area of itself and oxidizing gas, and the object to ferronickel powder may be implemented
Reason activation, to significantly improve subsequent selective oxidizing roasting effect.
According to one embodiment of present invention, the middle nickel of ferronickel powder and the concrete content of iron are not particularly restricted, ability
Field technique personnel can select according to actual needs, and according to a particular embodiment of the invention, nickel content can be in ferronickel powder
For 4~10wt%, iron content can be 50~90wt%.Inventor has found, high-purity in order to obtain in existing preparation process
Nickel oxide, it usually needs the higher copper nickel of nickel content is used, causes raw material production cost higher, is not easy to purchase, and it is of the invention
Relatively low to nickel grade requirement threshold in raw material, although the grade of nickel is relatively low in ferronickel powder, method using the present invention still may be used
The nickel oxide (nickel oxide content is higher than 99% or more) of high-purity is prepared, to be reduced while widening raw material sources
The production cost of nickel oxide.
According to still a further embodiment, the grain size of ferronickel fine powder is not particularly restricted, those skilled in the art
It can be selected according to actual needs, according to a particular embodiment of the invention, the grain size of ferronickel fine powder can be not higher than 150
Micron, more preferable 50 microns.Inventor has found that the ferronickel fine powder activity of the particle size range is higher, and is roasted in selective oxidation
It is larger with oxidizing gas contact area in the process, so as to significantly improve selective oxidation roasting effect.
According to still another embodiment of the invention, ferronickel powder can be obtained by restoring lateritic nickel ore.Specifically, first will
Lateritic nickel ore, reduction coal and additive carry out mixed pelletizing, obtain mixing pelletizing, then in rotary kiln or turn the mixing pelletizing
Reduction treatment is carried out in the stove of bottom, obtains metallized pellet, and above-mentioned gained metallized pellet is then subjected to water quenching-ore grinding-magnetic separation
Processing, so as to obtain ferronickel powder.Inventor has found, using lateritic nickel ore as the raw material for preparing ferronickel powder, although laterite
The grade of nickel is relatively low in nickel minerals, but the nickel oxide of high-purity can be still prepared in method using the present invention that (nickel oxide contains
Amount is higher than 99% or more), to reduce the production cost of nickel oxide while widening raw material sources.
Selective oxidation calciner 200, the selective oxidation calciner 200 have ferronickel fine powder entrance 201, oxygen
The property changed gas access 202 and product of roasting outlet 203, the ferronickel powder entrance 201 are connected with ferronickel fine powder outlet 102,
And suitable for the ferronickel fine powder is selectively oxidized roasting, to obtain product of roasting.Inventor has found, utilizes iron and nickel
Different to the affinity of oxygen, being selectively oxidized roasting to ferronickel fine powder can make iron be oxidized to Fe3O4, and nickel is not oxidized,
During subsequent ammonia soaks, Fe3O4Ammonia of getting along well reacts, and the consumption of ammonia is thus greatly decreased.It should be noted that this field
Technical staff can according to actual needs select selective oxidation roasting condition.According to an embodiment of the invention, described
Metallic iron mass content is less than 5% in product of roasting, and the ratio that metallic nickel accounts for full nickel is more than 95%, thus, it is possible to ensure iron oxygen
It is melted into Fe3O4, and nickel is not oxidized.
Ammonia leaching-ammonia still process-calciner plant 300, the ammonia leaching-ammonia still process-calciner plant 300 have product of roasting entrance 301, oxygen
To change nickel outlet 302 and magnetic tailings exports 303, the product of roasting entrance 301 is connected with product of roasting outlet 203, and
Suitable for the product of roasting is carried out ammonia leaching, ammonia still process and calcination processing, to obtain nickel oxide product.In the step, specifically,
It will be leached in product of roasting again ammonia-sal volatile first, while being blown into oxidizing gas into solution, made in product of roasting
Nickel occurs complex reaction with ammonia and generates nickel ammine Ni (NH3)6 2+And entering solution, iron and gangue then stay in magnetic leached mud
In, ammonia still process operation, output basic carbonate nickel (OH) are carried out after leaching2·NiCO3, finally nickel oxide is obtained by calcining
NiO products.It should be noted that those skilled in the art can according to actual needs select ammonia leaching-ammonia still process-calcination condition
It selects.
It is logical can to efficiently use ferronickel powder for the system according to the ... of the embodiment of the present invention for extracting nickel oxide using ferronickel powder as a result,
Cross wet processing extract to obtain high-purity nickel oxide (>99%), to reduce nickel while improving ferronickel powder utility value
Production cost, the nickel recovery of whole flow process it is high (>95%).
Below with reference to specific embodiment, present invention is described, it should be noted that these embodiments are only to describe
Property, without limiting the invention in any way.
Embodiment 1
Ferronickel powder (containing Ni 4.00%, TFe 50.00%) is subjected to fine grinding processing on fine grinding device, it is complete to obtain granularity
Portion is not higher than 150 μm of ferronickel fine powder, then roasts ferronickel fine powder selective oxidation, and temperature control is 500 DEG C, oxygen concentration
It is calculated as 0.5% by percent by volume, roasting time 20min, metal Ferrum content 4.34% in obtained product of roasting, metallic nickel
The ratio 95.07% of full nickel is accounted for, product of roasting, which is finally carried out ammonia leaching-ammonia still process-calcination processing, obtains nickel oxide product (nickel oxide
Grade 99.02%) and magnetic tailings, it is sent to as iron-smelting raw material after magnetic tailings magnetic separation, whole flow nickel recovery
95.02%.
Embodiment 2
Ferronickel powder (containing Ni 7.12%, TFe 59.62%) is subjected to fine grinding processing on fine grinding device, it is complete to obtain granularity
Portion is not higher than 150 μm of ferronickel fine powder, then roasts ferronickel fine powder selective oxidation, and temperature control is 400 DEG C, oxygen concentration
It is calculated as 2% by percent by volume, roasting time 5min, metal Ferrum content 3.43% in obtained product of roasting, metallic nickel accounts for
Product of roasting is finally carried out ammonia leaching-ammonia still process-calcination processing and obtains nickel oxide product (nickel oxide product by the ratio 96.11% of full nickel
97.51%) it with magnetic tailings, is sent to as iron-smelting raw material after magnetic tailings magnetic separation, whole flow nickel recovery 95.13% position.
Embodiment 3
Ferronickel powder (containing Ni 10.00%, TFe 77.56%) is subjected to fine grinding processing on fine grinding device, it is complete to obtain granularity
Portion is not higher than 50 μm of ferronickel fine powder, then roasts ferronickel fine powder selective oxidation, and temperature control is 450 DEG C, oxygen concentration
It is calculated as 1% by percent by volume, roasting time 15min, metal Ferrum content 5.00% in obtained product of roasting, metallic nickel accounts for
Product of roasting is finally carried out ammonia leaching-ammonia still process-calcination processing and obtains nickel oxide product (nickel oxide product by the ratio 98.89% of full nickel
99.51%) it with magnetic tailings, is sent to as iron-smelting raw material after magnetic tailings magnetic separation, whole flow nickel recovery 97.36% position.
Embodiment 4
Ferronickel powder (containing Ni 8.11%, TFe 90.00%) is subjected to fine grinding processing on fine grinding device, it is complete to obtain granularity
Portion is not higher than 50 μm of ferronickel fine powder, then roasts ferronickel fine powder selective oxidation, and temperature control is 300 DEG C, oxygen concentration
It is calculated as 1.5% by percent by volume, roasting time 10min, metal Ferrum content 3.34% in obtained product of roasting, metallic nickel
The ratio 99.02% of full nickel is accounted for, product of roasting, which is finally carried out ammonia leaching-ammonia still process-calcination processing, obtains nickel oxide product (nickel oxide
Grade 99.51%) and magnetic tailings, it is sent to as iron-smelting raw material after magnetic tailings magnetic separation, whole flow nickel recovery
98.44%.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office
It can be combined in any suitable manner in one or more embodiments or example.In addition, without conflicting with each other, the skill of this field
Art personnel can tie the feature of different embodiments or examples described in this specification and different embodiments or examples
It closes and combines.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, changes, replacing and modification.
What present disclosure referred to is exemplary embodiment, in the protection domain for not departing from claims and defining
In the case of, each embodiment of the application can be made various changes and modifications.Therefore, described embodiment is intended to contain
Lid falls all such changes, modifications and deformation in the protection domain of the appended claims.In addition, institute unless the context
Outside referring to, the word occurred in the singular includes plural form, and vice versa.In addition, unless stated otherwise, then any embodiment
All or part of in combination with any other embodiment all or part of use.
Claims (7)
1. a kind of method for extracting nickel oxide using ferronickel powder, which is characterized in that include the following steps：
(1) ferronickel fine powder is selectively oxidized roasting, iron is oxidized to Fe3O4, product of roasting is obtained, in the product of roasting
Metallic iron mass content is less than 5%, and the ratio that metallic nickel accounts for full nickel is more than 95%；
(2) product of roasting is subjected to ammonia leaching-ammonia still process-calcination processing and obtains nickel oxide product.
2. according to the method described in claim 1, it is characterized in that, before step (1), ferronickel powder is subjected to fine grinding, obtains institute
State ferronickel fine powder.
3. according to the method described in claim 1, it is characterized in that, grain size≤150 micron of the ferronickel fine powder.
4. according to the method described in claim 3, it is characterized in that, grain size≤50 micron of the ferronickel fine powder.
5. according to the method described in claim 1, it is characterized in that, iron content is 50~90wt% in the ferronickel fine powder.
6. according to the method described in claim 1, it is characterized in that, nickel content is 4~10wt% in the ferronickel fine powder.
7. according to the method described in claim 1, it is characterized in that, in step (1), temperature that the selective oxidation is roasted
Degree control is 300-500 DEG C, and oxygen concentration is calculated as 0.5%-2%, roasting time 5-20min by percent by volume.
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| CN113265532B (en) * | 2021-04-09 | 2023-01-13 | 广东邦普循环科技有限公司 | Method for leaching nickel-ammonia solution from nickel-iron alloy by wet method and application |
| CN113800578B (en) * | 2021-08-03 | 2022-11-15 | 广东邦普循环科技有限公司 | Method for preparing nickel sulfate by using low-nickel ferronickel |
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