CN106119573A - A kind of method and system utilizing lateritic nickel ore to extract nickel oxide - Google Patents
A kind of method and system utilizing lateritic nickel ore to extract nickel oxide Download PDFInfo
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- CN106119573A CN106119573A CN201610646784.4A CN201610646784A CN106119573A CN 106119573 A CN106119573 A CN 106119573A CN 201610646784 A CN201610646784 A CN 201610646784A CN 106119573 A CN106119573 A CN 106119573A
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- dilval
- nickel
- roasting
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B23/00—Obtaining nickel or cobalt
- C22B23/04—Obtaining nickel or cobalt by wet processes
- C22B23/0407—Leaching processes
- C22B23/0446—Leaching processes with an ammoniacal liquor or with a hydroxide of an alkali or alkaline-earth metal
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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
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/02—Roasting processes
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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
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/24—Binding; Briquetting ; Granulating
- C22B1/2406—Binding; Briquetting ; Granulating pelletizing
-
- 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
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/24—Binding; Briquetting ; Granulating
- C22B1/248—Binding; Briquetting ; Granulating of metal scrap or alloys
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Abstract
The present invention discloses a kind of method and system utilizing dilval to extract nickel oxide.Said method comprising the steps of: dilval is carried out melt processed by (1), obtains nickel-containing molten iron；(2) nickel-containing molten iron is carried out pelletization treatment, obtain dilval granule；(3) dilval granule is selectively oxidized roasting, obtains product of roasting；(4) product of roasting is carried out ammonia leaching ammonia still process calcination processing and obtains nickel oxide product.Described system includes melting appartus, granulation device, selective oxidation calciner and the ammonia leaching ammonia still process calciner plant being sequentially connected with.Described system includes melting appartus, granulation device, selective oxidation calciner and the ammonia leaching ammonia still process calciner plant being sequentially connected with.Utilize the present invention can effectively utilize dilval to pass through wet processing extraction and obtain highly purified nickel oxide (> 99%), thus while improving dilval value, reduce the production cost of nickel.
Description
Technical field
The invention belongs to non-ferrous metal extract field, particularly relate to a kind of utilize dilval extract nickel oxide method and
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 dilval is current prevailing technology, and wherein reduction roasting-molten point has become as the focus of research.
With lateritic nickel ore as raw material, coal dust is reducing agent, uses equipment of direct reduction under the high temperature conditions by the nickel in Ore all also
Former one-tenth metallic nickel, ferrum becomes metallic iron according to mixed carbon comtent partial reduction, then makes nickel be enriched in dilval through a molten point separation.At present
Also only residing within dilval research by the aspect of the raw material of its smelting stainless steel, value-added content of product is the highest.
Thus, existing dilval treatment technology is further improved.
Summary of the invention
Only reside within the aspect of the raw material of its smelting stainless steel to solve in prior art dilval research,
The problem that value-added content of product is the highest, it is an object of the present invention to propose a kind of method extracting nickel from dilval and
System, the method can effectively utilize dilval pass through wet processing extract obtain highly purified nickel oxide (> 99%), thus
The production cost of nickel is reduced, high (> 95% of the nickel recovery of whole flow process) while improving dilval value.
In one aspect of the invention, the present invention proposes a kind of method utilizing dilval to extract nickel oxide, the party
Method includes:
(1) dilval is carried out melt processed, obtain nickel-containing molten iron；
(2) nickel-containing molten iron is carried out pelletization treatment, obtain dilval granule；
(3) dilval granule is selectively oxidized roasting, obtains product of roasting；
(4) 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:
In some embodiments of the invention, in described dilval, iron content is 60～90wt%, nickel content be 10～
45wt%.
In some embodiments of the invention, in step (1), the temperature range of described melt processed is 1400～1600
℃。
In some embodiments of the invention, in step (2), the mode of described pelletization treatment is elected atomization as and is pelletized, will
The size controlling of described dilval granule is≤0.5 millimeter.
In some embodiments of the invention, in step (3), 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 dilval to extract nickel oxide, root
According to embodiments of the invention, this system includes: melting appartus, granulation device, selective oxidation calciner and ammonia leaching-ammonia still process-
Calciner plant；Wherein,
Described melting appartus has dilval entrance and nickel-containing molten iron outlet；
Described granulation device has nickel-containing molten iron entrance and dilval particle outlet, and described nickel-containing molten iron entrance is with described
Nickel-containing molten iron outlet is connected；
Described selective oxidation calciner has dilval particle entrance, oxidizing gas entrance and product of roasting and goes out
Mouthful, described dilval particle entrance is connected with described dilval particle 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.
Thus, the system utilizing dilval to extract nickel oxide according to embodiments of the present invention can effectively utilize ferronickel to close
Gold is extracted by wet processing and obtains highly purified nickel oxide (> 99%), thus while improving dilval value
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 dilval to extract nickel oxide according to an embodiment of the invention；
Fig. 2 is the system structure schematic diagram utilizing dilval 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.
The present invention discloses a kind of method utilizing dilval to extract nickel oxide, and the method includes:
(1) dilval is carried out melt processed, obtain nickel-containing molten iron；
(2) nickel-containing molten iron is carried out pelletization treatment, obtain dilval granule；
(3) dilval granule is selectively oxidized roasting, obtains product of roasting；
(4) product of roasting is carried out ammonia leaching-ammonia still process-calcination processing and obtain nickel oxide product.
Inventor finds, the ferrum in dilval mainly exists with metallic state, metallic iron can and ammonia react, follow-up be not suitable for
Directly carry out ammonia leaching, and metallic iron is changed into Fe3O4After would not consume ammonia.Then, first dilval is carried out melt processed
Obtaining nickel-containing molten iron, nickel-containing molten iron pelletization treatment obtains dilval granule.Then, after dilval Selective feeding being aoxidized
Ferrum selective oxidation is become Fe3O4, nickel does not aoxidizes, thus obtains product of roasting；Finally product of roasting is utilized the ammonia of existing maturation
Leaching-ammonia still process-calcine technology obtains nickel oxide product.
The method utilizing dilval to extract nickel oxide the embodiment of the present invention below with reference to Fig. 1 is described in detail.
According to embodiments of the invention, the method includes:
S100: dilval is carried out melt processed.
According to embodiments of the invention, dilval is carried out melt processed, such that it is able to obtain nickel-containing molten iron.
According to one embodiment of present invention, in dilval, the concrete content of nickel and ferrum is not particularly restricted, ability
Field technique personnel can select according to actual needs, and according to a particular embodiment of the invention, dilval nickel content is permissible
Being 10～45wt%, iron content can be 60～90wt%.Inventor finds, highly purified in order to obtain in existing preparation technology
Nickel, it usually needs use the copper nickel that nickel content is higher, cause raw material production relatively costly, is difficult to buying, and the present invention is to former
In material, nickel grade requirement threshold is relatively low, although in dilval, the grade of nickel is relatively low, but the method for the employing present invention is the most permissible
Prepare highly purified nickel oxide (nickel oxide nickel content is higher than more than 99%), thus reduce while widening raw material sources
The production cost of nickel.
According to still another embodiment of the invention, the condition of melt processed is not particularly restricted, those skilled in the art
Can select according to actual needs, according to a particular embodiment of the invention, melt processed can be at 1400～1600 DEG C
Carry out.
S200: carry out nickel-containing molten iron being atomized pelletization treatment.
According to embodiments of the invention, carry out nickel-containing molten iron being atomized pelletization treatment, such that it is able to obtain dilval
Grain.Inventor finds, pelletizes by nickel-containing molten iron carries out atomization, and ferronickel water is pelletized, such that it is able to significantly improve and oxygen
The contact area of the property changed gas, and then improve the selective oxidation effect of dilval granule further.In this step, specifically
, atomization pelletization is to utilize High-Pressure Water or inert gas to be smashed by nickel-containing molten iron in nebulizer to become fine droplet,
The most cooled, dry, sieve after obtain meeting the dilval granule of dimensional requirement, atomization mechanism is when High-Pressure Water or inertia
During gas shock ferronickel melt, convert kinetic energy into the surface energy of ferronickel melt, form numerous fine particle.
According to still another embodiment of the invention, dilval grain graininess is not particularly restricted, people in the art
Member can select according to actual needs, and according to a particular embodiment of the invention, the particle diameter of dilval granule is not more than 0.5
Millimeter.Inventor find, the dilval activity of this particle size range is higher, and during selective oxidation with oxidizing gas
Contact area is relatively big, such that it is able to significantly improve selective oxidation effect.
S300: dilval granule is selectively oxidized roasting.
According to embodiments of the invention, dilval granule is selectively oxidized roasting, such that it is able to obtain roasting
Product.Inventor finds, utilizing ferrum different to the affinity of oxygen with nickel, dilval granule is selectively oxidized roasting can
So that ferrum is oxidized to Fe3O4, and nickel is not oxidized, and during follow-up ammonia leaching, Fe3O4Discord ammonia reaction, the most significantly subtracts
The consumption of few ammonia.It should be noted that selective oxidation roasting condition can be entered by those skilled in the art according to actual needs
Row selects.According to embodiments of the invention, the temperature of described selective oxidation roasting is controlled for 300-500 DEG C, oxygen concentration
By volume percentages is 0.5%-2%, and roasting time is 5-20min so that metallic iron mass content in described product of roasting
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.
S400: 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 dilval to extract nickel oxide according to embodiments of the present invention can effectively utilize ferronickel to close
Gold is extracted by wet processing and obtains highly purified nickel oxide (> 99%), thus while improving dilval value
Reduce the production cost of nickel, 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 dilval to extract nickel oxide.Root
According to embodiments of the invention, this system includes: melting appartus, and described melting appartus has dilval entrance and nickel-containing molten iron goes out
Mouthful, and be suitable to described dilval is carried out melt processed, in order to obtain nickel-containing molten iron；Atomization granulation device, described atomization system
Grain device has nickel-containing molten iron entrance and dilval particle outlet, and described nickel-containing molten iron entrance exports phase with described nickel-containing molten iron
Connect, and be suitable to carry out described nickel-containing molten iron being atomized pelletization treatment, in order to obtain dilval granule；Selective oxidation roasting fills
Putting, described selective oxidation calciner has dilval particle entrance, oxidizing gas entrance and product of roasting outlet, institute
State dilval particle entrance to be connected with described dilval particle outlet, and be suitable to select described dilval granule
Property oxidizing roasting, in order to obtain product of roasting；Ammonia leaching-ammonia still process-calciner plant, described ammonia leaching-ammonia still process-calciner plant has roasting
Product inlet and nickel oxide outlet, described product of roasting entrance is connected with the outlet of described product of roasting, and is suitable to described roasting
Product carries out ammonia leaching, ammonia still process and calcination processing, in order to obtain nickel oxide product.Inventor finds, the ferrum in dilval is main
Exist with metallic state, metallic iron can and ammonia react, follow-up be not suitable for directly carrying out ammonia leaching, and metallic iron changed into Fe3O4The most just
Ammonia will not be consumed.Then, dilval first carrying out melt processed and obtains nickel-containing molten iron, nickel-containing molten iron pelletization treatment obtains ferronickel
Alloying pellet.Then, after being aoxidized by dilval Selective feeding, ferrum selective oxidation is become Fe3O4, nickel does not aoxidizes, thus
To product of roasting；The ammonia that product of roasting finally utilizes existing maturation soaks-and ammonia still process-calcine technology obtains nickel oxide product.With existing
Have technology to compare, can effectively utilize dilval to pass through wet processing extraction and obtain highly purified nickel oxide (> 99%), thus
The production cost of nickel is reduced, high (> 95% of the nickel recovery of whole flow process) while improving dilval value.
The system utilizing dilval to extract nickel oxide the embodiment of the present invention below with reference to Fig. 2 is described in detail.
According to embodiments of the invention, this system includes:
Melting appartus 100: according to embodiments of the invention, melting appartus 100 has dilval entrance 101 and containing ferronickel
Water out 102, and be suitable to dilval be carried out melt processed, such that it is able to obtain nickel-containing molten iron.
According to one embodiment of present invention, in dilval, the concrete content of nickel and ferrum is not particularly restricted, ability
Field technique personnel can select according to actual needs, and according to a particular embodiment of the invention, dilval nickel content is permissible
Being 10～45wt%, iron content can be 60～90wt%.Inventor finds, highly purified in order to obtain in existing preparation technology
Nickel, it usually needs use the copper nickel that nickel content is higher, cause raw material production relatively costly, is difficult to buying, and the present invention is to former
In material, nickel grade requirement threshold is relatively low, although in dilval, the grade of nickel is relatively low, but the method for the employing present invention is the most permissible
Prepare highly purified nickel oxide (nickel oxide nickel content is higher than more than 99%), thus reduce while widening raw material sources
The production cost of nickel.
According to still another embodiment of the invention, the condition of melt processed is not particularly restricted, those skilled in the art
Can select according to actual needs, according to a particular embodiment of the invention, melt processed can be at 1400～1600 DEG C
Carry out.
Atomization granulation device 200, according to embodiments of the invention, described granulation device 200 has nickel-containing molten iron entrance 201
With dilval particle outlet 202, nickel-containing molten iron entrance 201 is connected with nickel-containing molten iron outlet 102, and is suitable to enter nickel-containing molten iron
Row pelletization treatment, such that it is able to obtain dilval granule.Inventor finds, by gained nickel-containing molten iron is pelletized, from
And the contact area with oxidizing gas can be significantly improved, and then improve the selective oxidation effect of dilval further.
According to embodiments of the invention, carry out nickel-containing molten iron being atomized pelletization treatment, such that it is able to obtain dilval
Grain.Inventor finds, pelletizes by nickel-containing molten iron carries out atomization, and ferronickel water is pelletized, such that it is able to significantly improve and oxygen
The contact area of the property changed gas, and then improve the selective oxidation effect of dilval granule further.In this step, specifically
, atomization pelletization is to utilize High-Pressure Water or inert gas to be smashed by nickel-containing molten iron in nebulizer to become fine droplet,
The most cooled, dry, sieve after obtain meeting the dilval granule of dimensional requirement, atomization mechanism is when High-Pressure Water or inertia
During gas shock ferronickel melt, convert kinetic energy into the surface energy of ferronickel melt, form numerous fine particle.
According to still another embodiment of the invention, dilval grain graininess is not particularly restricted, people in the art
Member can select according to actual needs, and according to a particular embodiment of the invention, the particle diameter of dilval granule is not more than 0.5
Millimeter.Inventor find, the dilval activity of this particle size range is higher, and during selective oxidation with oxidizing gas
Contact area is relatively big, such that it is able to significantly improve selective oxidation effect.
Selective oxidation calciner 300, described selective oxidation calciner 300 has dilval particle entrance
301, oxidizing gas entrance 302 and product of roasting outlet 303, described dilval particle entrance 301 and described dilval
Particle outlet 202 is connected, and is suitable to described dilval granule is selectively oxidized roasting, in order to obtain product of roasting.
Inventor finds, utilizing ferrum different to the affinity of oxygen with nickel, dilval granule is selectively oxidized roasting can make
Ferrum is oxidized to Fe3O4, and nickel is not oxidized, and during follow-up ammonia leaching, Fe3O4Discord ammonia reaction, is thus greatly decreased ammonia
Consumption.It should be noted that selective oxidation roasting condition can be selected by those skilled in the art according to actual needs
Select.According to embodiments of the invention, in described product of roasting, metallic iron mass content is less than 5%, and metallic nickel accounts for the ratio of full nickel
More than 95%, thus, it is possible to ensure that ferrum is oxidized to Fe3O4, and nickel is not oxidized.
Ammonia leaching-ammonia still process-calciner plant 400, described ammonia leaching-ammonia still process-calciner plant 400 has product of roasting entrance 401, oxygen
Changing nickel outlet 402 and magnetic tailings outlet 403, described product of roasting entrance 401 is connected with described product of roasting outlet 303, 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 dilval to extract nickel oxide according to embodiments of the present invention can effectively utilize ferronickel to close
Gold is extracted by wet processing and obtains highly purified nickel oxide (> 99%), thus while improving dilval value
Reduce the production cost of nickel, 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
Dilval (containing Ni 10.00%, Fe 90.%) is melted under the conditions of 1600 DEG C in fusing stove and obtains containing ferronickel
Water, then makes gained nickel-containing molten iron the dilval granule that mean diameter is 0.15mm in atomization pellet fabrication device, then will
Dilval granule is selectively oxidized roasting, controls to be 400 DEG C by the temperature of described selective oxidation roasting, oxygen concentration
By volume percentages is 1%, and roasting time is 5min, and metal Ferrum content 3.44% in the product of roasting obtained, metallic nickel accounts for
The ratio 97.27% of full nickel, finally carries out product of roasting ammonia leaching-ammonia still process-calcination processing and obtains nickel oxide product (NiO grade
99.52%) and magnetic tailings, send to after magnetic tailings magnetic separation as iron-smelting raw material, whole piece flow process nickel recovery 97.36%.
Embodiment 2
By dilval (containing Ni 25.85%, Fe 74.53%) in fusing stove under the conditions of 1550 DEG C fusing obtain nickeliferous
Molten iron, then makes the dilval granule that mean diameter is 0.28mm, then by gained nickel-containing molten iron in atomization pellet fabrication device
Dilval granule being selectively oxidized roasting, controls to be 300 DEG C by the temperature of described selective oxidation roasting, oxygen is dense
Spending by volume percentages is 2%, and roasting time is 20min, metal Ferrum content 3.64%, metallic nickel in the product of roasting obtained
Account for the ratio 97.31% of full nickel, finally product of roasting is carried out ammonia leaching-ammonia still process-calcination processing and obtains nickel oxide product (NiO product
Position 99.12%) and magnetic tailings, send to after magnetic tailings magnetic separation as iron-smelting raw material, whole piece flow process nickel recovery 97.28%.
Embodiment 3
By dilval (containing Ni 45.00%, Fe 60.00%) in fusing stove under the conditions of 1400 DEG C fusing obtain nickeliferous
Molten iron, then makes the dilval granule that mean diameter is 0.49mm, then by gained nickel-containing molten iron in atomization pellet fabrication device
Dilval granule being selectively oxidized roasting, controls to be 500 DEG C by the temperature of described selective oxidation roasting, oxygen is dense
Spending by volume percentages is 0.5%, and roasting time is 15min, metal Ferrum content 4.99%, metal in the product of roasting obtained
Nickel accounts for the ratio 95.47% of full nickel, product of roasting finally carries out ammonia leaching-ammonia still process-calcination processing and obtains nickel oxide product (NiO
Grade 99.02%) and magnetic tailings, send to after magnetic tailings magnetic separation as iron-smelting raw material, whole piece flow process nickel recovery
95.28%.
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 dilval extracts nickel oxide, it is characterised in that comprise the following steps:
(1) dilval is carried out melt processed, obtain nickel-containing molten iron；
(2) nickel-containing molten iron is carried out pelletization treatment, obtain dilval granule；
(3) dilval granule is selectively oxidized roasting, obtains product of roasting；
(4) 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 in described dilval, iron content is 60～90wt%.
Method the most according to claim 1, it is characterised in that in described dilval, nickel content is 10～45wt%.
Method the most according to claim 1, it is characterised in that in step (1), the temperature range of described melt processed is
1400～1600 DEG C.
Method the most according to claim 1, it is characterised in that in step (2), the mode of described pelletization treatment elects mist as
Change and pelletize.
Method the most according to claim 1, it is characterised in that in step (2), by the particle diameter of described dilval granule
Control as≤0.5 millimeter.
Method the most according to claim 1, it is characterised in that in step (3), 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 utilizes the system that dilval extracts nickel oxide, it is characterised in that include melting appartus, granulation device, selection
Property oxidizing roasting device and ammonia leaching-ammonia still process-calciner plant；Wherein,
Described melting appartus has dilval entrance and nickel-containing molten iron outlet；
Described granulation device has nickel-containing molten iron entrance and dilval particle outlet, and described nickel-containing molten iron entrance is nickeliferous with described
Molten iron outlet is connected；
Described selective oxidation calciner has dilval particle entrance, oxidizing gas entrance and product of roasting outlet,
Described dilval particle entrance is connected with described dilval particle 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 granulation device is atomization granulation device.
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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