CN205990446U - A kind of utilization ferronickel powder extracts the system of nickel oxide - Google Patents
A kind of utilization ferronickel powder extracts the system of nickel oxide Download PDFInfo
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- CN205990446U CN205990446U CN201620860317.7U CN201620860317U CN205990446U CN 205990446 U CN205990446 U CN 205990446U CN 201620860317 U CN201620860317 U CN 201620860317U CN 205990446 U CN205990446 U CN 205990446U
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Abstract
This utility model discloses the system that a kind of utilization ferronickel powder extracts nickel oxide.Described system, soaks ammonia still process calciner plant including selective oxidation calciner and ammonia；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, and described product of roasting entrance is connected with the outlet of described product of roasting.Using this utility model can with effectively utilizes ferronickel powder by wet processing extract 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 high (>95%).
Description
Technical field
This utility model belong to non-ferrous metal extract field, more particularly, to a kind of using ferronickel powder extract nickel oxide be
System.
Background technology
In recent years, with the fast development of the exhausted and domestic rustless steel industry of high-grade nickel sulfide ore, 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, adopts 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 most of ferrum be reduced into Fe3O4, only small part is reduced into metallic iron, and calcining uses NH again3And
CO2Metallic nickel and cobalt are converted into nickel ammonia and cobalt ammonia complex enters solution, meanwhile, metallic iron also can generate ferrum ammino-complex and enter
Enter solution, then oxidized, hydrolysis is generated ferric hydroxide precipitate and separated with ammonia leaching solution, and ammonia leaching solution obtains alkali formula carbon through ammonia still process again
Sour nickel, then calcining obtains NiO.NiO can sell it is also possible to obtain metallic nickel by hydrogen reduction as product.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
Reduction has facilitation to the gathering of nickel with growing up, so this step control can cause the loss of a large amount of nickel, leads to whole piece technique
Nickel recovery low (nickel recovery is typically below 75%).Up to the present, only several, whole world factory adopts this method
Process lateritic nickel ore, three seldom have new plant to adopt ammonia soaking technology during the last ten years.
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, under the high temperature conditions will be complete for the nickel in Ore using equipment of direct reduction
Portion is reduced into metallic nickel, and ferrum becomes metallic iron according to mixed carbon comtent partial reduction, then so that nickel is enriched in ferronickel powder through magnetic separation separation.Mesh
Front also do not have large-scale commercial Application to ferronickel powder, and it is studied with also only reside within will be former as pneumatic steelmaking for its briquetting
Expect or obtain in the aspect as the raw material of smelting stainless steel after dilval through superfusion office reason again, value-added content of product is not
High.If processing ferronickel powder using ammonia soaking technology to carry nickel, 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.
Utility model content
This utility model is intended at least solve one of technical problem in correlation technique to a certain extent.For this reason, this reality
It is to propose the system that a kind of utilization ferronickel powder extracts nickel oxide with a new purpose, can be passed through with effectively utilizes ferronickel powder
Wet processing extract obtain highly purified nickel oxide (>99%), thus reducing nickel while improving ferronickel powder value
Production cost, the nickel recovery of whole flow process reaches more than 95%.
In one side of the present utility model, the utility model proposes a kind of using what ferronickel powder extracted nickel oxide be
System, according to embodiment of the present utility model, this system includes：Including selective oxidation calciner and ammonia leaching-ammonia still process-calcining dress
Put；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 roasting
Product exit is connected.
Thus, the utilization ferronickel powder according to this utility model embodiment extracts the system of nickel oxide, can be with effectively utilizes nickel
Iron powder by wet processing extract obtain highly purified nickel oxide (>99%), thus improve ferronickel powder value while
Reduce the production cost of nickel, the nickel recovery of whole flow process high (>95%).
When the granularity of the ferronickel fine powder entering selective oxidation calciner is excessively coarse, then it is unfavorable for entering of oxidation reaction
OK, now, this utility model also includes fine grinding device, and described fine grinding device has ferronickel powder entrance and the outlet of ferronickel fine powder, institute
State the outlet of ferronickel fine powder to be connected with described ferronickel fine powder entrance.Ferronickel powder is carried out fine grinding by fine grinding device, obtains described ferronickel thin
Powder, particle diameter≤150 micron of ferronickel fine powder, preferably particle diameter≤50 micron of ferronickel fine powder.
Described ammonia leaching-ammonia still process-calciner plant also includes the outlet of magnetic tailings, 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.
In some embodiments of the present utility model, in described ferronickel fine powder, iron content is 50～90wt%, and nickel content is 4
～10wt%.
In some embodiments of the present utility model, in described selective oxidation calciner, described selective oxidation
The temperature of roasting is 300-500 DEG C, and oxygen concentration is calculated as 0.5%-2% by percent by volume, and roasting time is 5-20min, makes
Obtain metallic iron mass content in product of roasting and be less than 5%, the ratio that metallic nickel accounts for full nickel is more than 95%.
Additional aspect of the present utility model and advantage will be set forth in part in the description, partly will be from explained below
In become obvious, or recognized by practice of the present utility model.
Brief description
Fig. 1 is the method flow schematic diagram of the utilization ferronickel powder extraction nickel oxide according to one embodiment of this utility model；
Fig. 2 is the system structure diagram of the utilization ferronickel powder extraction nickel oxide according to one embodiment of this utility model.
Specific embodiment
Embodiment of the present utility model is described below in detail, the example of described embodiment is shown in the drawings, wherein ad initio
To the element that same or similar label represents same or similar element or has same or like function eventually.Below by ginseng
The embodiment examining Description of Drawings is exemplary it is intended to be used for explaining this utility model, and it is not intended that to this utility model
Restriction.
In description of the present utility model it is to be understood that term " " center ", " longitudinal ", " horizontal ", " length ", " width
Degree ", " thickness ", " on ", D score, "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom ", " interior ", " outward ",
The orientation of instruction such as " clockwise ", " counterclockwise ", " axial ", " radially ", " circumferential " or position relationship are based on shown in the drawings
Orientation or position relationship, are for only for ease of description this utility model and simplify description, rather than the dress of instruction or hint indication
Put or element must have specific orientation, with specific azimuth configuration and operation, therefore it is not intended that to this utility model
Restriction.
Additionally, term " first ", " second " are only used for describing purpose, and it is not intended that indicating 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 description of the present utility model, " multiple " are meant that at least two, such as two
Individual, three etc., unless otherwise expressly limited specifically.
In this utility model, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection ", " Gu
Fixed " etc. term should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected or integral；Can be
It is mechanically connected or electrically connect；Can be to be joined directly together it is also possible to be indirectly connected to by intermediary, can be two
The connection of element internal or the interaction relationship of two elements, limit unless otherwise clear and definite.Common skill for this area
For art personnel, concrete meaning in this utility model for the above-mentioned term can be understood as the case may be.
In this utility model, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score
Can be the first and second feature directly contacts, or the first and second features pass through intermediary mediate contact.And, first is special
Levy second feature " on ", " top " and " above " but fisrt feature directly over second feature or oblique upper, or only
Represent that fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " permissible
Be fisrt feature immediately below second feature or obliquely downward, or be merely representative of fisrt feature level height and be less than second feature.
In one side of the present utility model, the utility model proposes a kind of using what ferronickel powder extracted nickel oxide be
System.According to embodiment of the present utility model, the method that this system is extracted includes：(1) ferronickel fine powder is selectively oxidized roasting
Burn, obtain product of roasting；(2) product of roasting is carried out ammonia leaching-ammonia still process-calcination processing and obtain nickel oxide product.
Inventor finds, the ferrum in ferronickel powder is mainly existed with metallic state, and metallic iron subsequently can be not suitable for straight with ammonia reaction
Tap into the leaching of row ammonia, and metallic iron is changed into Fe3O4After would not consume ammonia.Then, first ferronickel powder fine grinding is processed and obtain ferronickel
Ferrum selective oxidation is become Fe after being then selectively oxidized ferronickel fine powder by fine powder3O4, nickel does not aoxidize, thus obtaining roasting
Product；Finally product of roasting is obtained nickel oxide product using existing ripe ammonia leaching-ammonia still process-calcine technology.With prior art
Compare, can with effectively utilizes ferronickel powder by wet processing extract obtain highly purified nickel oxide (>99%), thus improving nickel
Reduce the production cost of nickel while iron powder value, the nickel recovery of whole flow process high (>95%).
Inventor finds, the ferrum in ferronickel powder is mainly existed with metallic state, and metallic iron subsequently can be not suitable for straight with ammonia reaction
Tap into the leaching of row ammonia, and metallic iron is changed into Fe3O4After would not consume ammonia.Then, first ferronickel powder fine grinding is processed and obtain ferronickel
Ferrum selective oxidation is become Fe after being then selectively oxidized ferronickel fine powder by fine powder3O4, nickel does not aoxidize, thus obtaining roasting
Product；Finally product of roasting is obtained nickel oxide product using existing ripe ammonia leaching-ammonia still process-calcine technology.With prior art
Compare, can with effectively utilizes ferronickel powder by wet processing extract obtain highly purified nickel oxide (>99%), thus improving nickel
Reduce the production cost of nickel while iron powder value, the nickel recovery of whole flow process high (>95%).
Below with reference to Fig. 1, this utility model embodiment is retouched in detail using the method that ferronickel powder extracts nickel oxide
State.According to embodiment of the present utility model, the method includes：
S100：Ferronickel powder is carried out fine grinding process.
According to embodiment of the present utility model, ferronickel powder is carried out fine grinding process, such that it is able to obtain ferronickel fine powder.Invention
People finds, by carrying out fine grinding process to ferronickel powder, can significantly improve the contact area of itself and oxidizing gas, and permissible
Realize physically activated to ferronickel powder, thus significantly improving selective oxidation roasting effect.
According to an embodiment of the present utility model, the middle nickel of ferronickel powder and the concrete content of ferrum are not particularly restricted,
Those skilled in the art can be selected according to actual needs, according to specific embodiment of the utility model, nickel in ferronickel powder
Content can be 4～10wt%, and iron content can be 50～90wt%.Inventor finds, in order to obtain in existing preparation technology
Highly purified nickel oxide, it usually needs using the higher copper nickel of nickel content, lead to raw material production cost higher, is difficult to purchase,
And this utility model relatively low to nickel grade requirement threshold in raw material although in ferronickel powder the grade of nickel relatively low, but adopt this reality
Highly purified nickel oxide (nickel oxide content is higher than more than 99%) still can be prepared with new method, thus former widening
Reduce the production cost of nickel oxide while material source.
According to further embodiment of the present utility model, the particle diameter of ferronickel fine powder is not particularly restricted, art technology
Personnel can be selected according to actual needs, and according to specific embodiment of the utility model, the particle diameter of ferronickel fine powder can be
Not higher than 150 microns, more preferably no higher than 50 microns.Inventor finds, the ferronickel fine powder activity of this particle size range is higher, and
Larger with oxidizing gas contact area in selective oxidation roasting process, such that it is able to significantly improve selective oxidation roasting effect
Really.
According to another embodiment of the present utility model, ferronickel powder can be obtained by reducing lateritic nickel ore.Specifically, first
First lateritic nickel ore, reduction coal and additive are carried out mixed pelletizing, obtain mixing pelletizing, then by this mixing pelletizing in rotary kiln
Or carry out reduction treatment in rotary hearth furnace, obtain metallized pellet, then by above-mentioned gained metallized pellet carry out water quenching-ore grinding-
Magnetic separation is processed, such that it is able to obtain ferronickel powder.Inventor find, using lateritic nickel ore as the raw material preparing ferronickel powder although
In lateritic nickel ore, the grade of nickel is relatively low, but still can prepare highly purified nickel oxide using method of the present utility model
(nickel oxide content is higher than more than 99%), thus reduce the production cost of nickel oxide while widening raw material sources.
Certainly, less if being selectively oxidized the ferronickel powder particles that roasting adopted, meet selective oxidation roasting
Require, then can omit and above-mentioned ferronickel powder be carried out fine grinding process step.
S200：Ferronickel powder is selectively oxidized roasting.
According to embodiment of the present utility model, ferronickel fine powder is selectively oxidized roasting, such that it is able to obtain roasting
Product.Inventor finds, using the ferrum and nickel characteristic different to the affinity of oxygen, is selectively oxidized roasting to ferronickel fine powder
Ferrum can be made to be oxidized to Fe3O4, and nickel is not oxidized, and during follow-up ammonia soaks, Fe3O4Discord ammonia reaction, thus significantly
Reduce the consumption of ammonia.It should be noted that those skilled in the art can be according to actual needs to selective oxidation roasting condition
Selected.According to embodiment of the present utility model, the temperature control of described selective oxidation roasting is 300-500 DEG C, oxygen
Gas concentration is calculated as 0.5%-2% by percent by volume, and roasting time is 5-20min so that metal weight of iron contains in product of roasting
Amount is less than 5%, and the ratio that metallic nickel accounts for full nickel 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 embodiment of the present utility model, product of roasting is carried out ammonia leaching-ammonia still process-calcination processing, such that it is able to obtain
Nickel oxide product and magnetic tailings.In this step, specifically, will leach in product of roasting again ammonia-sal volatile first, simultaneously
It is blown into oxidizing gas in solution, make the nickel in product of roasting occur complex reaction to generate nickel ammine Ni with ammonia
(NH3)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 alkali formula after terminating
Carbonic acid nickel (OH)2·NiCO3, eventually pass calcining and obtain nickel oxide NiO product.It should be noted that those skilled in the art
According to actual needs ammonia leaching-ammonia still process-calcination condition can be selected.
Thus, the method for the utilization ferronickel powder extraction nickel oxide according to this utility model embodiment can be with effectively utilizes ferronickel
Powder by wet processing extract obtain highly purified nickel oxide (>99%), thus dropping while improving ferronickel powder value
The production cost of low nickel, the nickel recovery of whole flow process high (>95%).
In other side of the present utility model, the utility model proposes a kind of using what ferronickel powder extracted nickel oxide be
System.According to embodiment of the present utility model, this system includes：Fine grinding device, described fine grinding device has ferronickel powder entrance and nickel
Ferrum fine powder exports, and is suitable to for described ferronickel powder to carry out fine grinding process, to obtain ferronickel fine powder；Selective oxidation roasting fills
Put, described selective oxidation calciner has ferronickel fine powder entrance, oxidizing gas entrance and product of roasting outlet, described nickel
Ferrum fine powder entrance is connected with the outlet of described ferronickel fine powder, and is suitable to for described ferronickel fine powder to be selectively oxidized roasting, so that
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 oxidation
Nickel exports, and described product of roasting entrance is connected with the outlet of described product of roasting, and is suitable to for described product of roasting to carry out ammonia leaching, steaming
Ammonia and calcination processing, to obtain nickel oxide product.
It should be noted that this utility model utilizes ferronickel powder to extract in the system of nickel oxide, fine grinding device is not required
Equipment, only when enter selective oxidation calciner ferronickel fine powder granularity excessively coarse, be unfavorable for oxidation reaction
Just needs when carrying out.
Compared with prior art, can with effectively utilizes ferronickel powder by wet processing extract 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 high (>
95%).
Below with reference to Fig. 2, in conjunction with Fig. 2, this utility model embodiment is carried out using the system that ferronickel powder extracts nickel oxide
Describe in detail.In the present embodiment, this system includes：
Fine grinding device 100：According to embodiment of the present utility model, fine grinding device 100 has ferronickel powder entrance 101 and ferronickel
Fine powder outlet 102, and be suitable to for ferronickel powder to carry out fine grinding process, such that it is able to obtain ferronickel fine powder.Inventor finds, by right
Ferronickel powder carries out fine grinding process, can significantly improve the contact area of itself and oxidizing gas, and can realize to ferronickel powder
Physically activated, thus significantly improving subsequent selective oxidizing roasting effect.
According to an embodiment of the present utility model, the middle nickel of ferronickel powder and the concrete content of ferrum are not particularly restricted,
Those skilled in the art can be selected according to actual needs, according to specific embodiment of the utility model, nickel in ferronickel powder
Content can be 4～10wt%, and iron content can be 50～90wt%.Inventor finds, in order to obtain in existing preparation technology
Highly purified nickel oxide, it usually needs using the higher copper nickel of nickel content, lead to raw material production cost higher, is difficult to purchase,
And this utility model relatively low to nickel grade requirement threshold in raw material although in ferronickel powder the grade of nickel relatively low, but adopt this reality
Highly purified nickel oxide (nickel oxide content is higher than more than 99%) still can be prepared with new method, thus former widening
Reduce the production cost of nickel oxide while material source.
According to further embodiment of the present utility model, the particle diameter of ferronickel fine powder is not particularly restricted, art technology
Personnel can be selected according to actual needs, and according to specific embodiment of the utility model, the particle diameter of ferronickel fine powder can be
Not higher than 150 microns, more preferably 50 microns.Inventor finds, the ferronickel fine powder activity of this particle size range is higher, and in selectivity
Larger with oxidizing gas contact area during oxidizing roasting, such that it is able to significantly improve selective oxidation roasting effect.
According to another embodiment of the present utility model, ferronickel powder can be obtained by reducing lateritic nickel ore.Specifically, first
First lateritic nickel ore, reduction coal and additive are carried out mixed pelletizing, obtain mixing pelletizing, then by this mixing pelletizing in rotary kiln
Or carry out reduction treatment in rotary hearth furnace, obtain metallized pellet, then by above-mentioned gained metallized pellet carry out water quenching-ore grinding-
Magnetic separation is processed, such that it is able to obtain ferronickel powder.Inventor find, using lateritic nickel ore as the raw material preparing ferronickel powder although
In lateritic nickel ore, the grade of nickel is relatively low, but still can prepare highly purified nickel oxide using method of the present utility model
(nickel oxide content is higher than more than 99%), thus reduce the production cost of nickel oxide while widening raw material sources.
Selective oxidation calciner 200, has ferronickel fine powder entrance 201, oxidizing gas entrance 202 and product of roasting
Outlet 203, described ferronickel powder entrance 201 is connected with described ferronickel fine powder outlet 102, and is suitable to be selected described ferronickel fine powder
The oxidizing roasting of selecting property, to obtain product of roasting.Inventor finds, different to the affinity of oxygen with nickel using ferrum, thin to ferronickel
Powder is selectively oxidized roasting can make ferrum be oxidized to Fe3O4, and nickel is not oxidized, and during follow-up ammonia soaks, Fe3O4
Discord ammonia reaction, is thus greatly decreased the consumption of ammonia.It should be noted that those skilled in the art can be according to actual needs
Selective oxidation roasting condition is selected.According to embodiment of the present utility model, metal weight of iron in described product of roasting
Content is less than 5%, and the ratio that metallic nickel accounts for full nickel is more than 95%, thus, it is possible to ensure that ferrum is oxidized to Fe3O4, and nickel is not by oxygen
Change.
Ammonia leaching-ammonia still process-calciner plant 300 has product of roasting entrance 301, nickel oxide outlet 302 and the outlet of magnetic tailings
303, described product of roasting entrance 301 is connected with described product of roasting outlet 203, and is suitable to for described product of roasting to carry out ammonia
Leaching, ammonia still process and calcination processing, to obtain nickel oxide product.In this step, specifically, first by product of roasting ammonia-carbonic acid again
Leach in ammonium salt solution, be blown into oxidizing gas in solution simultaneously, make the nickel in product of roasting occur complex reaction to generate with ammonia
Nickel ammine Ni (NH3)6 2+And entering solution, ferrum and stone-like pulse are then stayed in magnetic leached mud, leach and carry out ammonia still process behaviour after terminating
Make, output basic carbonate nickel (OH)2·NiCO3, eventually pass calcining and obtain nickel oxide NiO product.It should be noted that this
Skilled person can select to ammonia leaching-ammonia still process-calcination condition according to actual needs.
Thus, the system of the utilization ferronickel powder extraction nickel oxide according to this utility model embodiment can be with effectively utilizes ferronickel
Powder by wet processing extract obtain highly purified nickel oxide (>99%), thus dropping while improving ferronickel powder value
The production cost of low nickel, the nickel recovery of whole flow process high (>95%).
Below with reference to specific embodiment, this utility model is described, it should be noted that these embodiments are only
Descriptive, and limit this utility model 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
The ferronickel fine powder that not higher than 150 μm of portion, then by ferronickel fine powder selective oxidation roasting, temperature control is 500 DEG C, oxygen concentration
It is calculated as 0.5% by percent by volume, roasting time is 20min, metal Ferrum content 4.34%, metallic nickel in the product of roasting obtaining
Account for the ratio 95.07% of full nickel, finally product of roasting is carried out ammonia leaching-ammonia still process-calcination processing and obtain 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
The ferronickel fine powder that not higher than 150 μm of portion, then by ferronickel fine powder selective oxidation roasting, temperature control is 400 DEG C, oxygen concentration
It is calculated as 2% by percent by volume, roasting time is 5min, metal Ferrum content 3.43% in the product of roasting obtaining, and 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
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
The ferronickel fine powder that not higher than 50 μm of portion, then by ferronickel fine powder selective oxidation roasting, temperature control is 450 DEG C, oxygen concentration
It is calculated as 1% by percent by volume, roasting time is 15min, metal Ferrum content 5.00% in the product of roasting obtaining, and 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
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
The ferronickel fine powder that not higher than 50 μm of portion, then by ferronickel fine powder selective oxidation roasting, temperature control is 300 DEG C, oxygen concentration
It is calculated as 1.5% by percent by volume, roasting time is 10min, metal Ferrum content 3.34%, metallic nickel in the product of roasting obtaining
Account for the ratio 99.02% of full nickel, finally product of roasting is carried out ammonia leaching-ammonia still process-calcination processing and obtain 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
The description of example " or " some examples " etc. means specific features, structure, material or the spy describing with reference to this embodiment or example
Point is contained at least one embodiment of the present utility model or example.In this manual, the schematic table to above-mentioned term
State and be necessarily directed to identical embodiment or example.And, the specific features of description, structure, material or feature are permissible
Any one or more embodiments or example combine in an appropriate manner.Additionally, in the case of not conflicting, this area
Technical staff the feature of the different embodiments described in this specification or example and different embodiment or example can be entered
Row combines and combines.
Although of the present utility model embodiment has been shown and described above it is to be understood that above-described embodiment is
Exemplary it is impossible to be interpreted as that those of ordinary skill in the art is in scope of the present utility model to restriction of the present utility model
Interior above-described embodiment can be changed, change, replacing and modification.
What this utility model disclosure was touched upon is exemplary embodiment, in the protection defined without departing from claims
In the case of scope, each embodiment of the application can be made various changes and modifications.Therefore, described embodiment purport
Covering to fall all such changes, modifications and deformation in the protection domain of appended claims.Additionally, except context is another
Allude to outer, the word occurring in the singular includes plural form, and vice versa.In addition, unless stated otherwise, then Ren Heshi
Apply example all or part of can in conjunction with any other embodiment all or part of use.
Claims (8)
1. a kind of utilization 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.
2. system according to claim 1 is it is characterised in that described system also includes fine grinding device, described fine grinding device
There is ferronickel powder entrance and the outlet of ferronickel fine powder, described ferronickel fine powder outlet is connected with described ferronickel fine powder entrance.
3. system according to claim 1 is it is characterised in that described ammonia leaching-ammonia still process-calciner plant also includes magnetic tailings
Outlet.
4., it is characterised in that described fine grinding device is levigate by ferronickel powder, obtain is described for system according to claim 2
Particle diameter≤150 micron of ferronickel fine powder.
5. system according to claim 4 is it is characterised in that particle diameter≤50 micron of the described ferronickel fine powder obtaining.
6. system according to claim 1 it is characterised in that in described ferronickel fine powder iron content be 50～90wt%.
7. system according to claim 1 it is characterised in that in described ferronickel fine powder nickel content be 4～10wt%.
8. system according to claim 1 is it is characterised in that in described selective oxidation calciner, described selection
Property oxidizing roasting temperature be 300-500 DEG C, oxygen concentration is calculated as 0.5%-2% by percent by volume, roasting time be 5-
20min so that in product of roasting metallic iron mass content be less than 5%, metallic nickel account for full nickel ratio be more than 95%.
Priority Applications (1)
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| CN106086468B (en) * | 2016-08-09 | 2018-08-28 | 江苏省冶金设计院有限公司 | A kind of method and system extracting nickel oxide using ferronickel powder |
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