CN106086468A - A kind of method and system utilizing ferronickel powder to extract nickel oxide - Google Patents
A kind of method and system utilizing ferronickel powder to extract nickel oxide Download PDFInfo
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- CN106086468A CN106086468A CN201610650312.6A CN201610650312A CN106086468A CN 106086468 A CN106086468 A CN 106086468A CN 201610650312 A CN201610650312 A CN 201610650312A CN 106086468 A CN106086468 A CN 106086468A
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- ferronickel
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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
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Abstract
The present invention discloses a kind of method and system utilizing ferronickel powder to extract nickel oxide.Said method comprising the steps of: ferronickel fine powder is selectively oxidized roasting by (1), obtains product of roasting；(2) product of roasting is carried out ammonia leaching ammonia still process calcination processing and obtains nickel oxide product.Described system includes selective oxidation calciner and ammonia leaching ammonia still process calciner plant.Utilize the present invention can effectively utilize ferronickel powder to pass through wet processing extraction and obtain highly purified nickel oxide (> 99%), thus while improving ferronickel powder value, reduce the production cost of nickel, high (> 95% of the nickel recovery of whole flow process).
Description
Technical field
The invention belongs to non-ferrous metal and extract field, particularly relate to a kind of method utilizing ferronickel powder to extract nickel oxide and be
System.
Background technology
In recent years, along with the exhausted of high-grade nickel sulfide ore and the fast development of domestic rustless steel industry, low-grade laterite
Nickel minerals has become as the primary raw material producing ferro-nickel product.Wet treatment lateritic nickel ore starts from the forties in 20th century, uses the earliest
Be ammonia soaking technology, this technique is by Caron teaching inventive, so being also called Caron technique.The basic procedure of this technique is
Reduction roasting-ammonia leaching, the purpose of reduction roasting is to make silicic acid nickel and nickel oxide in lateritic nickel ore be reduced into metal to greatest extent,
Control the condition of reduction simultaneously, make major part ferrum be reduced into Fe3O4, only small part is reduced into metallic iron, and calcining uses NH again3And
CO2Metallic nickel and cobalt being converted into nickel ammonia and cobalt ammonia complex enters solution, meanwhile, metallic iron also can generate ferrum ammino-complex and enter
Entering solution, the most oxidized, hydrolysis generates ferric hydroxide precipitate and separates with ammonia leaching solution, and ammonia leaching solution obtains alkali formula carbon through ammonia still process again
Acid nickel, then calcining obtains NiO.NiO can sell as product, it is also possible to obtains metallic nickel by hydrogen reduction.This technique
Shortcoming is that nickel recovery is low, and reason is when reducing lateritic nickel ore, it is ensured that ferrum is tried one's best and few is reduced into metallic state, due to ferrum
The gathering to nickel of reducing has facilitation with growing up, so this step control can cause the loss of a large amount of nickel, causes whole piece technique
Nickel recovery low (nickel recovery is typically below 75%).Up to the present, the whole world only several factories use this method
Processing lateritic nickel ore, three seldom have new plant to use ammonia soaking technology.
Pyrogenic attack lateritic nickel ore is current prevailing technology, and wherein reduction roasting-mill ore magnetic selection has become as research
Focus.With lateritic nickel ore as raw material, coal dust is reducing agent, uses equipment of direct reduction under the high temperature conditions by complete for the nickel in Ore
Portion is reduced into metallic nickel, and ferrum becomes metallic iron according to mixed carbon comtent partial reduction, then makes nickel be enriched in ferronickel powder through magnetic separation separation.Mesh
Before ferronickel powder also do not had large-scale commercial Application, its research is also only resided within using former as pneumatic steelmaking of its briquetting
Material or again through superfusion divisional processing obtain dilval after as in the aspect of the raw material of smelting stainless steel, value-added content of product is not
High.If using ammonia soaking technology to process ferronickel powder carry nickel, being different from the reduced calcine of Caron technique, the ferrum in ferronickel powder is almost
All presented in metallic iron, leaching process can consume substantial amounts of ammonia leaching agent, brings difficulty to the leaching of nickel.
Thus, ferronickel powder treatment technology is further improved.
Summary of the invention
It is contemplated that one of technical problem solved the most to a certain extent in correlation technique.To this end, the present invention
One purpose is to propose a kind of method and system utilizing ferronickel powder to extract nickel oxide, and the method can effectively utilize ferronickel powder
Extracted by wet processing and obtain highly purified nickel oxide (> 99%), thus reduce while improving ferronickel powder value
The production cost of nickel, the nickel recovery of whole flow process reaches more than 95%.
In one aspect of the invention, the present invention proposes a kind of method utilizing ferronickel powder to extract nickel oxide, according to this
Inventive embodiments, the method includes:
(1) ferronickel fine powder is selectively oxidized roasting, obtains product of roasting；
(2) product of roasting is carried out ammonia leaching-ammonia still process-calcination processing and obtain nickel oxide product.
It addition, the method utilizing dilval to extract nickel oxide according to the above embodiment of the present invention can also have as follows
Additional technical characteristic:
If treating, the granularity of the ferronickel powder of selectivity oxidizing roasting is the most coarse, then be unfavorable for the carrying out of oxidation reaction, now,
The present invention is front in step (1), ferronickel powder need to be carried out fine grinding, obtains described ferronickel fine powder.
Concrete, particle diameter≤150 micron of described ferronickel fine powder.
Further, particle diameter≤50 micron of described ferronickel fine powder.
In some embodiments of the invention, in described ferronickel fine powder, iron content is 50～90wt%, nickel content be 4～
10wt%.
In some embodiments of the invention, in step (1), by the temperature control of described selective oxidation roasting it is
300-500 DEG C, oxygen concentration by volume percentages is 0.5%-2%, and roasting time is 5-20min so that in product of roasting
Metallic iron mass content is less than 5%, and metallic nickel accounts for the ratio of full nickel more than 95%.
In another aspect of the present invention, the present invention proposes a kind of system utilizing ferronickel powder to extract nickel oxide, according to
Embodiments of the invention, this system includes: include selective oxidation calciner and ammonia leaching-ammonia still process-calciner plant；Wherein,
Described selective oxidation calciner has ferronickel fine powder entrance, oxidizing gas entrance and product of roasting outlet；
Described ammonia leaching-ammonia still process-calciner plant have product of roasting entrance and nickel oxide outlet, described product of roasting entrance and
The outlet of described product of roasting is connected.
When the granularity of the ferronickel fine powder entering selective oxidation calciner is the most coarse, then it is unfavorable for entering of oxidation reaction
OK, now, present invention additionally comprises fine grinding device, described fine grinding device has ferronickel powder entrance and the outlet of ferronickel fine powder, described nickel
The outlet of ferrum fine powder is connected with described ferronickel fine powder entrance.Ferronickel powder is carried out fine grinding by fine grinding device, obtains described ferronickel fine powder, nickel
Particle diameter≤150 micron of ferrum fine powder, preferably particle diameter≤50 micron of ferronickel fine powder.
Described ammonia leaching-ammonia still process-calciner plant also includes that magnetic tailings exports, and the outlet of magnetic tailings connects entering of ironmaking system
Mouthful, magnetic tailings can be sent to as ironmaking system after magnetic separation, as raw material.
Thus, the ferronickel powder that utilizes according to embodiments of the present invention extracts the method and system of nickel oxide, can effectively utilize
Ferronickel powder is extracted by wet processing and obtains highly purified nickel oxide (> 99%), thus improving the same of ferronickel powder value
Time reduce the production cost of nickel, high (> 95% of the nickel recovery of whole flow process).
The additional aspect of the present invention and advantage will part be given in the following description, and part will become from the following description
Obtain substantially, or recognized by the practice of the present invention.
Accompanying drawing explanation
Fig. 1 is the method flow schematic diagram utilizing ferronickel powder to extract nickel oxide according to an embodiment of the invention；
Fig. 2 is the system structure schematic diagram utilizing ferronickel powder to extract nickel oxide according to an embodiment of the invention.
Detailed description of the invention
Embodiments of the invention are described below in detail, and the example of described embodiment is shown in the drawings, the most from start to finish
Same or similar label represents same or similar element or has the element of same or like function.Below with reference to attached
The embodiment that figure describes is exemplary, it is intended to is used for explaining the present invention, and is not considered as limiting the invention.
In describing the invention, it is to be understood that term " " center ", " longitudinally ", " laterally ", " length ", " width ",
" thickness ", " on ", D score, "front", "rear", "left", "right", " vertically ", " level ", " top ", " end ", " interior ", " outward ", " up time
Pin ", " counterclockwise ", " axially ", " radially ", the orientation of the instruction such as " circumferential " or position relationship be based on orientation shown in the drawings or
Position relationship, is for only for ease of the description present invention and simplifies description rather than instruction or imply that the device of indication or element must
Must have specific orientation, with specific azimuth configuration and operation, be therefore not considered as limiting the invention.
Additionally, term " first ", " second " are only used for describing purpose, and it is not intended that instruction or hint relative importance
Or the implicit quantity indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can express or
Implicitly include at least one this feature.In describing the invention, " multiple " are meant that at least two, such as two, three
Individual etc., unless otherwise expressly limited specifically.
In the present invention, unless otherwise clearly defined and limited, term " install ", " being connected ", " connection ", " fixing " etc.
Term should be interpreted broadly, and connects for example, it may be fixing, it is also possible to be to removably connect, or integral；Can be that machinery connects
Connect, it is also possible to be electrical connection；Can be to be joined directly together, it is also possible to be indirectly connected to by intermediary, in can being two elements
The connection in portion or the interaction relationship of two elements, unless otherwise clear and definite restriction.For those of ordinary skill in the art
For, above-mentioned term concrete meaning in the present invention can be understood as the case may be.
In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score permissible
It is that the first and second features directly contact, or the first and second features are by intermediary mediate contact.And, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature directly over second feature or oblique upper, 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 immediately below second feature or obliquely downward, or is merely representative of fisrt feature level height less than second feature.
In one aspect of the invention, the present invention proposes a kind of method utilizing ferronickel powder to extract nickel oxide.According to this
Inventive embodiment, the method includes: ferronickel fine powder is selectively oxidized roasting by (1), obtains product of roasting；(2) will roasting
Burning product carries out ammonia leaching-ammonia still process-calcination processing and obtains nickel oxide product.
Inventor finds, the ferrum in ferronickel powder mainly exists with metallic state, metallic iron can and ammonia react, follow-up be not suitable for straight
Tap into the leaching of row ammonia, and metallic iron is changed into Fe3O4After would not consume ammonia.Then, first ferronickel powder fine grinding process is obtained ferronickel
Fine powder, becomes Fe by ferrum selective oxidation after being then selectively oxidized by ferronickel fine powder3O4, nickel does not aoxidizes, thus obtains roasting
Product；The ammonia that product of roasting finally utilizes existing maturation soaks-and ammonia still process-calcine technology obtains nickel oxide product.With prior art
Compare, can effectively utilize ferronickel powder to pass through wet processing extraction and obtain highly purified nickel oxide (> 99%), thus improving nickel
The production cost of nickel is reduced, high (> 95% of the nickel recovery of whole flow process) while iron powder value.
Inventor finds, the ferrum in ferronickel powder mainly exists with metallic state, metallic iron can and ammonia react, follow-up be not suitable for straight
Tap into the leaching of row ammonia, and metallic iron is changed into Fe3O4After would not consume ammonia.Then, first ferronickel powder fine grinding process is obtained ferronickel
Fine powder, becomes Fe by ferrum selective oxidation after being then selectively oxidized by ferronickel fine powder3O4, nickel does not aoxidizes, thus obtains roasting
Product；The ammonia that product of roasting finally utilizes existing maturation soaks-and ammonia still process-calcine technology obtains nickel oxide product.With prior art
Compare, can effectively utilize ferronickel powder to pass through wet processing extraction and obtain highly purified nickel oxide (> 99%), thus improving nickel
The production cost of nickel is reduced, high (> 95% of the nickel recovery of whole flow process) while iron powder value.
The method utilizing ferronickel powder to extract nickel oxide the embodiment of the present invention below with reference to Fig. 1 is described in detail.Root
According to embodiments of the invention, the method includes:
S100: ferronickel powder is carried out fine grinding process.
According to embodiments of the invention, ferronickel powder is carried out fine grinding process, such that it is able to obtain ferronickel fine powder.Invention Crinis Carbonisatus
Existing, by ferronickel powder is carried out fine grinding process, the contact area of itself and oxidizing gas can be significantly improved, and can realize
Physically activated to ferronickel powder, thus significantly improve selective oxidation roasting effect.
According to one embodiment of present invention, the middle nickel of ferronickel powder and the concrete content of ferrum are not particularly restricted, ability
Field technique personnel can select according to actual needs, and according to a particular embodiment of the invention, in ferronickel powder, nickel content is permissible
Being 4～10wt%, iron content can be 50～90wt%.Inventor finds, highly purified in order to obtain in existing preparation technology
Nickel oxide, it usually needs use the copper nickel that nickel content is higher, cause raw material production relatively costly, is difficult to purchase, and the present invention
Relatively low to nickel grade requirement threshold in raw material, although in ferronickel powder, the grade of nickel is relatively low, but use the method for the present invention still may be used
To prepare highly purified nickel oxide (nickel oxide content is higher than more than 99%), thus reduce while widening raw material sources
The production cost of nickel oxide.
According to still a further embodiment, the particle diameter of ferronickel fine powder is not particularly restricted, those skilled in the art
Can select according to actual needs, according to a particular embodiment of the invention, the particle diameter of ferronickel fine powder can be not higher than 150
Micron, more preferably no higher than 50 microns.Inventor finds, the ferronickel fine powder activity of this particle size range is higher, and at selectivity oxygen
Change in roasting process relatively big, such that it is able to significantly improve selective oxidation roasting effect with oxidizing gas contact area.
According to still another embodiment of the invention, ferronickel powder can be obtained by reduction lateritic nickel ore.Concrete, first will
Lateritic nickel ore, reduction coal and additive carry out mixed pelletizing, obtain mixing pelletizing, then at rotary kiln or are turned by this mixing pelletizing
Carry out reduction treatment in end stove, obtain metallized pellet, then above-mentioned gained metallized pellet is carried out shrend-ore grinding-magnetic separation
Process, such that it is able to obtain ferronickel powder.Inventor finds, uses lateritic nickel ore as the raw material preparing ferronickel powder, although laterite
In nickel minerals, the grade of nickel is relatively low, but (nickel oxide contains to use the method for the present invention still can prepare highly purified nickel oxide
Amount is higher than more than 99%), thus while widening raw material sources, reduce the production cost of nickel oxide.
Certainly, if it is less to be selectively oxidized the ferronickel powder granule that roasting used, selective oxidation roasting is met
Requirement, then can omit above-mentioned ferronickel powder is carried out fine grinding process step.
S200: ferronickel powder is selectively oxidized roasting.
According to embodiments of the invention, ferronickel fine powder is selectively oxidized roasting, such that it is able to obtain product of roasting.
Inventor finds, utilizes the characteristic that ferrum and nickel are different to the affinity of oxygen, ferronickel fine powder is selectively oxidized roasting permissible
Ferrum is made to be oxidized to Fe3O4, and nickel is not oxidized, and during follow-up ammonia leaching, Fe3O4Discord ammonia reaction, is thus greatly decreased
The consumption of ammonia.It should be noted that selective oxidation roasting condition can be carried out by those skilled in the art according to actual needs
Select.According to embodiments of the invention, controlling the temperature of described selective oxidation roasting for 300-500 DEG C, oxygen concentration is pressed
Percent by volume is calculated as 0.5%-2%, and roasting time is 5-20min so that in product of roasting, metallic iron mass content is less than
5%, metallic nickel accounts for the ratio of full nickel and is more than 95%, thus, it is possible to ensure that ferrum is oxidized to Fe3O4, and nickel is not oxidized.
S300: product of roasting is carried out ammonia leaching-ammonia still process-calcination processing.
According to embodiments of the invention, product of roasting is carried out ammonia leaching-ammonia still process-calcination processing, such that it is able to aoxidized
Nickel product and magnetic tailings.In this step, concrete, first will product of roasting again ammonia-sal volatile leach, simultaneously to molten
Liquid is blown into oxidizing gas, makes the nickel in product of roasting generate nickel ammine Ni (NH with ammonia generation complex reaction3)6 2+And
Entering solution, ferrum and stone-like pulse are then stayed in magnetic leached mud, leach and carry out ammonia still process operation, output basic carbonate nickel after terminating
(OH)2·NiCO3, eventually pass calcining and obtain nickel oxide NiO product.It should be noted that those skilled in the art can basis
It is actually needed and ammonia leaching-ammonia still process-calcination condition is selected.
Thus, the method utilizing ferronickel powder to extract nickel oxide according to embodiments of the present invention can effectively utilize ferronickel powder to lead to
Cross wet processing extraction and obtain highly purified nickel oxide (> 99%), thus while improving ferronickel powder value, reduce nickel
Production cost, high (> 95% of the nickel recovery of whole flow process).
In another aspect of the present invention, the present invention proposes a kind of system utilizing ferronickel powder to extract nickel oxide.According to
Embodiments of the invention, this system includes: fine grinding device, and described fine grinding device has ferronickel powder entrance and the outlet of ferronickel fine powder,
And be suitable to described ferronickel powder is carried out fine grinding process, in order to obtain ferronickel fine powder；Selective oxidation calciner, described selectivity
Oxidizing roasting device have ferronickel fine powder entrance, oxidizing gas entrance and product of roasting outlet, described ferronickel fine powder entrance and
The outlet of described ferronickel fine powder is connected, and is suitable to described ferronickel fine powder is selectively oxidized roasting, in order to obtain product of roasting；
Ammonia leaching-ammonia still process-calciner plant, described ammonia leaching-ammonia still process-calciner plant has product of roasting entrance and nickel oxide outlet, described roasting
Burn product inlet to be connected with the outlet of described product of roasting, and be suitable to described product of roasting is carried out ammonia leaching, ammonia still process and calcination processing,
To obtain nickel oxide product.
It should be noted that the present invention utilizes ferronickel powder to extract in the system of nickel oxide, fine grinding device not necessarily sets
Standby, only the most coarse when the granularity of the ferronickel fine powder entering selective oxidation calciner, it is unfavorable for the carrying out of oxidation reaction
Time just need.
Compared with prior art, can effectively utilize ferronickel powder to pass through wet processing extraction and obtain highly purified nickel oxide (>
99%), thus reducing the production cost of nickel while improving ferronickel powder value, the nickel recovery of whole flow process is high (>
95%).
Below with reference to Fig. 2, the system utilizing ferronickel powder to extract nickel oxide the embodiment of the present invention in conjunction with Fig. 2 is carried out in detail
Describe.In the present embodiment, this system includes:
Fine grinding device 100: according to embodiments of the invention, fine grinding device 100 has ferronickel powder entrance 101 and ferronickel fine powder
Outlet 102, and be suitable to ferronickel powder is carried out fine grinding process, such that it is able to obtain ferronickel fine powder.Inventor finds, by ferronickel
Powder carries out fine grinding process, can significantly improve the contact area of itself and oxidizing gas, and can realize the thing to ferronickel powder
Reason activation, thus 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 ferrum are not particularly restricted, ability
Field technique personnel can select according to actual needs, and according to a particular embodiment of the invention, in ferronickel powder, nickel content is permissible
Being 4～10wt%, iron content can be 50～90wt%.Inventor finds, highly purified in order to obtain in existing preparation technology
Nickel oxide, it usually needs use the copper nickel that nickel content is higher, cause raw material production relatively costly, is difficult to purchase, and the present invention
Relatively low to nickel grade requirement threshold in raw material, although in ferronickel powder, the grade of nickel is relatively low, but use the method for the present invention still may be used
To prepare highly purified nickel oxide (nickel oxide content is higher than more than 99%), thus reduce while widening raw material sources
The production cost of nickel oxide.
According to still a further embodiment, the particle diameter of ferronickel fine powder is not particularly restricted, those skilled in the art
Can select according to actual needs, according to a particular embodiment of the invention, the particle diameter of ferronickel fine powder can be not higher than 150
Micron, more preferably 50 microns.Inventor finds, the ferronickel fine powder activity of this particle size range is higher, and in selective oxidation roasting
During relatively big, such that it is able to significantly improve selective oxidation roasting effect with oxidizing gas contact area.
According to still another embodiment of the invention, ferronickel powder can be obtained by reduction lateritic nickel ore.Concrete, first will
Lateritic nickel ore, reduction coal and additive carry out mixed pelletizing, obtain mixing pelletizing, then at rotary kiln or are turned by this mixing pelletizing
Carry out reduction treatment in end stove, obtain metallized pellet, then above-mentioned gained metallized pellet is carried out shrend-ore grinding-magnetic separation
Process, such that it is able to obtain ferronickel powder.Inventor finds, uses lateritic nickel ore as the raw material preparing ferronickel powder, although laterite
In nickel minerals, the grade of nickel is relatively low, but (nickel oxide contains to use the method for the present invention still can prepare highly purified nickel oxide
Amount is higher than more than 99%), thus while widening raw material sources, reduce the production cost of nickel oxide.
Selective oxidation calciner 200, described selective oxidation calciner 200 has ferronickel fine powder entrance 201, oxygen
The property changed gas access 202 and product of roasting outlet 203, described ferronickel powder entrance 201 is connected with described ferronickel fine powder outlet 102,
And be suitable to described ferronickel fine powder is selectively oxidized roasting, in order to obtain product of roasting.Inventor finds, utilizes ferrum and nickel
Different to the affinity of oxygen, ferronickel fine powder is selectively oxidized roasting ferrum can be made to be oxidized to Fe3O4, and nickel is not oxidized,
During follow-up ammonia leaching, Fe3O4Discord ammonia reaction, is thus greatly decreased the consumption of ammonia.It should be noted that this area
Selective oxidation roasting condition can be selected by technical staff according to actual needs.According to embodiments of the invention, described
In product of roasting, metallic iron mass content is less than 5%, and metallic nickel accounts for the ratio of full nickel and is more than 95%, thus, it is possible to ensure ferrum oxygen
Chemical conversion Fe3O4, and nickel is not oxidized.
Ammonia leaching-ammonia still process-calciner plant 300, described ammonia leaching-ammonia still process-calciner plant 300 has product of roasting entrance 301, oxygen
Changing nickel outlet 302 and magnetic tailings outlet 303, described product of roasting entrance 301 is connected with described product of roasting outlet 203, and
Be suitable to described product of roasting is carried out ammonia leaching, ammonia still process and calcination processing, in order to obtain nickel oxide product.It is in this step, concrete,
First product of roasting again ammonia-sal volatile will leach, in solution, be blown into oxidizing gas simultaneously, make in product of roasting
Nickel generates nickel ammine Ni (NH with ammonia generation complex reaction3)6 2+And entering solution, ferrum and stone-like pulse then stay magnetic leached mud
In, leach and carry out ammonia still process operation, output basic carbonate nickel (OH) after terminating2·NiCO3, eventually pass calcining and obtain nickel oxide
NiO product.It should be noted that ammonia leaching-ammonia still process-calcination condition can be selected by those skilled in the art according to actual needs
Select.
Thus, the system utilizing ferronickel powder to extract nickel oxide according to embodiments of the present invention can effectively utilize ferronickel powder to lead to
Cross wet processing extraction and obtain highly purified nickel oxide (> 99%), thus while improving ferronickel powder value, reduce nickel
Production cost, high (> 95% of the nickel recovery of whole flow process).
Below with reference to specific embodiment, present invention is described, it should be noted that these embodiments are only to describe
Property, and limit the present invention never in any form.
Embodiment 1
Ferronickel powder (containing Ni 4.00%, TFe 50.00%) is carried out fine grinding process on fine grinding device, obtains granularity complete
Portion is not higher than the ferronickel fine powder of 150 μm, and then by ferronickel fine powder selective oxidation roasting, it is 500 DEG C that temperature controls, oxygen concentration
By volume percentages is 0.5%, and roasting time is 20min, metal Ferrum content 4.34%, metallic nickel in the product of roasting obtained
Account for the ratio 95.07% of full nickel, finally product of roasting is carried out ammonia leaching-ammonia still process-calcination processing and obtains nickel oxide product (nickel oxide
Grade 99.02%) and magnetic tailings, send to after magnetic tailings magnetic separation as iron-smelting raw material, whole piece flow process nickel recovery
95.02%.
Embodiment 2
Ferronickel powder (containing Ni 7.12%, TFe 59.62%) is carried out fine grinding process on fine grinding device, obtains granularity complete
Portion is not higher than the ferronickel fine powder of 150 μm, and then by ferronickel fine powder selective oxidation roasting, it is 400 DEG C that temperature controls, oxygen concentration
By volume percentages is 2%, and roasting time is 5min, and metal Ferrum content 3.43% in the product of roasting obtained, metallic nickel accounts for
The ratio 96.11% of full nickel, finally carries out product of roasting ammonia leaching-ammonia still process-calcination processing and obtains nickel oxide product (nickel oxide product
Position 97.51%) and magnetic tailings, send to after magnetic tailings magnetic separation as iron-smelting raw material, whole piece flow process nickel recovery 95.13%.
Embodiment 3
Ferronickel powder (containing Ni 10.00%, TFe 77.56%) is carried out fine grinding process on fine grinding device, obtains granularity complete
Portion is not higher than the ferronickel fine powder of 50 μm, and then by ferronickel fine powder selective oxidation roasting, it is 450 DEG C that temperature controls, oxygen concentration
By volume percentages is 1%, and roasting time is 15min, and metal Ferrum content 5.00% in the product of roasting obtained, metallic nickel accounts for
The ratio 98.89% of full nickel, finally carries out product of roasting ammonia leaching-ammonia still process-calcination processing and obtains nickel oxide product (nickel oxide product
Position 99.51%) and magnetic tailings, send to after magnetic tailings magnetic separation as iron-smelting raw material, whole piece flow process nickel recovery 97.36%.
Embodiment 4
Ferronickel powder (containing Ni 8.11%, TFe 90.00%) is carried out fine grinding process on fine grinding device, obtains granularity complete
Portion is not higher than the ferronickel fine powder of 50 μm, and then by ferronickel fine powder selective oxidation roasting, it is 300 DEG C that temperature controls, oxygen concentration
By volume percentages is 1.5%, and roasting time is 10min, metal Ferrum content 3.34%, metallic nickel in the product of roasting obtained
Account for the ratio 99.02% of full nickel, finally product of roasting is carried out ammonia leaching-ammonia still process-calcination processing and obtains nickel oxide product (nickel oxide
Grade 99.51%) and magnetic tailings, send to after magnetic tailings magnetic separation as iron-smelting raw material, whole piece flow process nickel recovery
98.44%.
In the description of this specification, reference term " embodiment ", " some embodiments ", " example ", " specifically show
Example " or the description of " some examples " etc. means to combine this embodiment or example describes specific features, structure, material or spy
Point is contained at least one embodiment or the example of the present invention.In this manual, to the schematic representation of above-mentioned term not
Identical embodiment or example must be directed to.And, the specific features of description, structure, material or feature can be in office
One or more embodiments or example combine in an appropriate manner.Additionally, in the case of the most conflicting, the skill of this area
The feature of the different embodiments described in this specification or example and different embodiment or example can be tied by art personnel
Close and combination.
Although above it has been shown and described that embodiments of the invention, it is to be understood that above-described embodiment is example
Property, it is impossible to being interpreted as limitation of the present invention, those of ordinary skill in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, revises, replaces and modification.
What present disclosure was touched upon is exemplary embodiment, at the protection domain defined without departing from claims
In the case of, each embodiment of the application can be made various changes and modifications.Therefore, described embodiment is intended to contain
All this type of that lid falls in the protection domain of appended claims changes, revises and deform.Additionally, institute unless the context
Outside finger, the word occurred in the singular includes plural form, and vice versa.It addition, unless stated otherwise, then any embodiment
All or part of can in conjunction with any other embodiments all or part of use.
Claims (10)
1. one kind utilizes the method that ferronickel powder extracts nickel oxide, it is characterised in that comprise the following steps:
(1) ferronickel fine powder is selectively oxidized roasting, obtains product of roasting；
(2) product of roasting is carried out ammonia leaching-ammonia still process-calcination processing and obtain nickel oxide product.
Method the most according to claim 1, it is characterised in that front in step (1), carries out fine grinding by ferronickel powder, obtains institute
State ferronickel fine powder.
Method the most according to claim 1, it is characterised in that particle diameter≤150 micron of described ferronickel fine powder.
Method the most according to claim 3, it is characterised in that particle diameter≤50 micron of described ferronickel fine powder.
Method the most according to claim 1, it is characterised in that in described ferronickel fine powder, iron content is 50～90wt%.
Method the most according to claim 1, it is characterised in that in described ferronickel fine powder, nickel content is 4～10wt%.
Method the most according to claim 1, it is characterised in that in step (1), by the temperature of described selective oxidation roasting
Degree controls as 300-500 DEG C, and oxygen concentration by volume percentages is 0.5%-2%, and roasting time is 5-20min so that roasting
Burning metallic iron mass content in product and be less than 5%, metallic nickel accounts for the ratio of full nickel more than 95%.
8. one kind utilize ferronickel powder extract nickel oxide system, it is characterised in that include selective oxidation calciner and ammonia leaching-
Ammonia still process-calciner plant；Wherein,
Described selective oxidation calciner has ferronickel fine powder entrance, oxidizing gas entrance and product of roasting outlet；
Described ammonia leaching-ammonia still process-calciner plant has product of roasting entrance and nickel oxide outlet, described product of roasting entrance and described
Product of roasting outlet is connected.
System the most according to claim 8, it is characterised in that described system also includes fine grinding device, described fine grinding device
Having ferronickel powder entrance and the outlet of ferronickel fine powder, the outlet of described ferronickel fine powder is connected with described ferronickel fine powder entrance.
System the most according to claim 8, it is characterised in that described ammonia leaching-ammonia still process-calciner plant also includes magnetic tail
Slag exports.
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