CN106119573B - A kind of method and system for extracting nickel oxide using lateritic nickel ore - Google Patents
A kind of method and system for extracting nickel oxide using lateritic nickel ore Download PDFInfo
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- CN106119573B CN106119573B CN201610646784.4A CN201610646784A CN106119573B CN 106119573 B CN106119573 B CN 106119573B CN 201610646784 A CN201610646784 A CN 201610646784A CN 106119573 B CN106119573 B CN 106119573B
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- nickel
- dilval
- roasting
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- ammonia
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Classifications
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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
-
- 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
Abstract
The present invention discloses a kind of method and system for extracting nickel oxide using dilval.It the described method comprises the following steps：(1) dilval is subjected to melt processed, obtains nickel-containing molten iron；(2) nickel-containing molten iron is subjected to pelletization treatment, obtains dilval particle；(3) dilval particle is selectively oxidized roasting, obtains product of roasting；(4) product of roasting is subjected to ammonia leaching ammonia still process calcination processing and obtains nickel oxide product.The system comprises sequentially connected melting appartus, granulation device, selective oxidation calciner and ammonia to soak ammonia still process calciner plant.The system comprises sequentially connected melting appartus, granulation device, selective oxidation calciner and ammonia to soak ammonia still process calciner plant.Using the present invention can efficiently use dilval by wet processing extract to obtain high-purity nickel oxide (>99%), to reduce the production cost of nickel while improving dilval utility value.
Description
Technical field
The invention belongs to non-ferrous metal extraction field more particularly to it is a kind of using dilval extract nickel oxide method and
System.
Background technology
In recent years, with the fast development of the exhausted and domestic stainless steel industry of high-grade nickel sulfide ore, low-grade laterite
Nickel minerals has become the primary raw material of production ferro-nickel product.Wet-treating lateritic nickel ore starts from the 1940s, using earliest
Be ammonia soaking technology, this technique is by Caron teaching inventives, so also known as Caron techniques.The basic procedure of the technique is
Reduction roasting-ammonia leaching, the purpose of reduction roasting are that silicic acid nickel and nickel oxide in lateritic nickel ore is made to be reduced into metal to the maximum extent,
The condition for controlling reduction simultaneously, makes most of iron be reduced into Fe3O4, only small part is reduced into metallic iron, and calcining uses NH again3And
CO2Convert metallic nickel and cobalt to nickel ammonia and cobalt ammonia complex enter solution, meanwhile, metallic iron can also generate iron ammino-complex into
Enter solution, then oxidized, hydrolysis generates ferric hydroxide precipitate and separated with ammonia leaching solution, and ammonia leaching solution obtains alkali formula carbon using ammonia still process
Sour nickel, then calcining obtain NiO.NiO can be used as product to sell, and can also obtain metallic nickel by hydrogen reduction.The technique
The disadvantage is that nickel recovery is low, the reason is that when restoring lateritic nickel ore, it is ensured that iron it is few as possible be reduced into metallic state, due to iron
Restoring the aggregation to nickel and growing up has facilitation, so the control of this step can cause the loss of a large amount of nickel, leads to whole technique
Nickel recovery it is low (nickel recovery is generally below 75%).Up to the present, the whole world only several factories use the method
Handle lateritic nickel ore, three during the last ten years few new plants use ammonia soaking technology.
Pyrogenic attack dilval is current prevailing technology, wherein molten point of hot spot for having become research of reduction roasting-.
Using lateritic nickel ore as raw material, coal dust is reducing agent, is under the high temperature conditions all gone back the nickel in ore using direct reduction equipment
For original at metallic nickel, iron makes nickel be enriched in dilval according to mixed carbon comtent partial reduction at metallic iron, then through molten point of separation.At present
Dilval research is also only resided in the level of the raw material of its smelting stainless steel, value-added content of product is not high.
Existing dilval treatment technology is further improved as a result,.
Invention content
It is only resided in the level of the raw material of its smelting stainless steel to solve dilval research in the prior art,
The not high problem of value-added content of product, an object of the present invention is to provide a kind of from dilval extract nickel method and
System, this method can efficiently use dilval by wet processing extract to obtain high-purity nickel oxide (>99%), to
Reduce the production cost of nickel while improving dilval utility value, the nickel recovery of whole flow process it is high (>95%).
In one aspect of the invention, the present invention proposes a kind of method for extracting nickel oxide using dilval, the party
Method includes：
(1) dilval is subjected to melt processed, obtains nickel-containing molten iron；
(2) nickel-containing molten iron is subjected to pelletization treatment, obtains dilval particle；
(3) dilval particle is selectively oxidized roasting, obtains product of roasting；
(4) product of roasting is subjected to ammonia leaching-ammonia still process-calcination processing and obtains nickel oxide product.
In addition, it is according to the above embodiment of the present invention using dilval extract nickel oxide method can also have it is as follows
Additional technical characteristic：
In some embodiments of the invention, in the dilval iron content be 60~90wt%, nickel content be 10~
45wt%.
In some embodiments of the invention, in step (1), the temperature range of the melt processed is 1400~1600
℃。
In some embodiments of the invention, in step (2), the mode of the pelletization treatment is selected as atomization granulation, will
The size controlling of the dilval particle is≤0.5 millimeter.
In some embodiments of the invention, in step (3), it is by the temperature control that the selective oxidation roasts
300-500 DEG C, oxygen concentration is calculated as 0.5%-2%, roasting time 5-20min so that in product of roasting by percent by volume
Metallic iron mass content is less than 5%, and the ratio that metallic nickel accounts for full nickel is more than 95%.
In another aspect of the present invention, the present invention proposes a kind of system for extracting nickel oxide using dilval, root
According to the embodiment of the present invention, which includes：Melting appartus, granulation device, selective oxidation calciner and ammonia leaching-ammonia still process-
Calciner plant；Wherein,
There is the melting appartus dilval entrance and nickel-containing molten iron to export；
The granulation device have nickel-containing molten iron entrance and dilval particle outlet, the nickel-containing molten iron entrance with it is described
Nickel-containing molten iron outlet is connected；
There is the selective oxidation calciner dilval particle entrance, oxidizing gas entrance and product of roasting to go out
Mouthful, the dilval particle entrance is connected with the dilval particle outlet；
There is the ammonia leaching-ammonia still process-calciner plant product of roasting entrance and nickel oxide to export, the product of roasting entrance and
The product of roasting outlet is connected.
The system according to the ... of the embodiment of the present invention for extracting nickel oxide using dilval can efficiently use ferronickel and close as a result,
Gold extract to obtain by wet processing high-purity nickel oxide (>99%), to while improving dilval utility value
Reduce the production cost of nickel, the nickel recovery of whole flow process it is high (>95%).
The additional aspect and advantage of the present invention will be set forth in part in the description, and will partly become from the following description
Obviously, or practice through the invention is recognized.
Description of the drawings
Fig. 1 is the method flow schematic diagram according to an embodiment of the invention that nickel oxide is extracted using dilval；
Fig. 2 is the system structure diagram according to an embodiment of the invention that nickel oxide is extracted using dilval.
Specific implementation mode
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to for explaining the present invention, and is not considered as limiting the invention.
In the description of the present invention, it is to be understood that, term "center", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside", " up time
The orientation or positional relationship of the instructions such as needle ", " counterclockwise ", " axial direction ", " radial direction ", " circumferential direction " be orientation based on ... shown in the drawings or
Position relationship is merely for convenience of description of the present invention and simplification of the description, and does not indicate or imply the indicated device or element must
There must be specific orientation, with specific azimuth configuration and operation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are used for description purposes only, it is not understood to indicate or imply relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include at least one this feature.In the description of the present invention, the meaning of " plurality " is at least two, such as two, three
It is a etc., unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；Can be that machinery connects
It connects, can also be electrical connection；It can be directly connected, can also can be indirectly connected through an intermediary in two elements
The interaction relationship of the connection in portion or two elements, unless otherwise restricted clearly.For those of ordinary skill in the art
For, the specific meanings of the above terms in the present invention can be understood according to specific conditions.
In the present invention unless specifically defined or limited otherwise, fisrt feature can be with "above" or "below" second feature
It is that the first and second features are in direct contact or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature be directly above or diagonally above the second feature, or be merely representative of
Fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be
One feature is directly under or diagonally below the second feature, or is merely representative of fisrt feature level height and is less than second feature.
The present invention discloses a kind of method for extracting nickel oxide using dilval, and this method includes：
(1) dilval is subjected to melt processed, obtains nickel-containing molten iron；
(2) nickel-containing molten iron is subjected to pelletization treatment, obtains dilval particle；
(3) dilval particle is selectively oxidized roasting, obtains product of roasting；
(4) product of roasting is subjected to ammonia leaching-ammonia still process-calcination processing and obtains nickel oxide product.
Inventor has found that the iron in dilval mainly exists with metallic state, and metallic iron can subsequently be not suitable for ammonia reaction
Ammonia leaching is directly carried out, and metallic iron is converted to Fe3O4After would not consume ammonia.Then, dilval is first subjected to melt processed
Nickel-containing molten iron is obtained, nickel-containing molten iron pelletization treatment obtains dilval particle.Then, after dilval Selective feeding being aoxidized
By iron selective oxidation at Fe3O4, nickel does not aoxidize, to obtain product of roasting；Product of roasting is finally utilized to the ammonia of existing maturation
Leaching-ammonia still process-calcine technology obtains nickel oxide product.
The method for extracting nickel oxide using dilval of the embodiment of the present invention is described in detail below with reference to Fig. 1.
According to an embodiment of the invention, this method includes：
S100：Dilval is subjected to melt processed.
According to an embodiment of the invention, dilval is subjected to melt processed, so as to obtain nickel-containing molten iron.
According to one embodiment of present invention, the concrete content of nickel and iron is not particularly restricted in dilval, ability
Field technique personnel can select according to actual needs, and according to a particular embodiment of the invention, dilval nickel content can be with
For 10~45wt%, iron content can be 60~90wt%.Inventor has found, high-purity in order to obtain in existing preparation process
Nickel, it usually needs the higher copper nickel of nickel content is used, causes raw material production cost higher, is not easy to purchase, and the present invention is to original
Nickel grade requirement threshold is relatively low in material, although the grade of nickel is relatively low in dilval, method using the present invention still can be with
The nickel oxide (nickel oxide nickel content is higher than 99% or more) of high-purity is prepared, to be reduced while widening raw material sources
The production cost of nickel.
According to still another embodiment of the invention, the condition of melt processed is not particularly restricted, those skilled in the art
It can be selected according to actual needs, according to a particular embodiment of the invention, melt processed can be at 1400~1600 DEG C
It carries out.
S200：Nickel-containing molten iron is subjected to atomization pelletization treatment.
According to an embodiment of the invention, nickel-containing molten iron is subjected to atomization pelletization treatment, so as to obtain dilval
Grain.Inventor has found that, by carrying out atomization granulation to nickel-containing molten iron, ferronickel water is pelletized, so as to significantly improve and oxygen
The contact area of the property changed gas, and then further increase the selective oxidation effect of dilval particle.In the step, specifically
, atomization pelletization is to be smashed nickel-containing molten iron as fine droplet in atomizer using high pressure water flow or inert gas,
The dilval particle met the size requirements after cooling, drying, screening again, atomization mechanism are to work as high pressure water flow or inertia
When gas shock ferronickel melt, the surface energy of ferronickel melt is converted kinetic energy into, forms numerous fine particle.
According to still another embodiment of the invention, dilval grain graininess is not particularly restricted, people in the art
Member can be selected according to actual needs, and according to a particular embodiment of the invention, the grain size of dilval particle is not more than 0.5
Millimeter.Inventor has found that the dilval activity of the particle size range is higher, and during selective oxidation and oxidizing gas
Contact area is larger, so as to significantly improve selective oxidation effect.
S300：Dilval particle is selectively oxidized roasting.
According to an embodiment of the invention, dilval particle is selectively oxidized roasting, so as to be roasted
Product.Inventor has found that different to the affinity of oxygen with nickel using iron, being selectively oxidized roasting to dilval particle can
So that iron is oxidized to Fe3O4, and nickel is not oxidized, and during subsequent ammonia soaks, Fe3O4Ammonia of getting along well reacts, and thus substantially subtracts
The consumption of few ammonia.It should be noted that those skilled in the art can according to actual needs to selective oxidation roasting condition into
Row selection.According to an embodiment of the invention, the temperature control selective oxidation roasted is 300-500 DEG C, oxygen concentration
It is calculated as 0.5%-2%, roasting time 5-20min by percent by volume so that metallic iron mass content in the product of roasting
Less than 5%, the ratio that metallic nickel accounts for full nickel is more than 95%, thus, it is possible to ensure that iron is oxidized to Fe3O4, and nickel is not oxidized.
S400：Product of roasting is subjected to ammonia leaching-ammonia still process-calcination processing.
According to an embodiment of the invention, product of roasting is subjected to ammonia leaching-ammonia still process-calcination processing, so as to be aoxidized
Nickel product and magnetic tailings.In the step, specifically, will be leached in product of roasting again ammonia-sal volatile first, while to molten
It is blown into oxidizing gas in liquid, makes the nickel in product of roasting that complex reaction occur with ammonia and generates nickel ammine Ni (NH3)6 2+And
Into solution, iron and gangue then stay in magnetic leached mud, and ammonia still process operation, output basic carbonate nickel are carried out after leaching
(OH)2.NiCO3, finally nickel oxide NiO products are obtained by calcining.It should be noted that those skilled in the art can basis
Actual needs selects ammonia leaching-ammonia still process-calcination condition.
The method according to the ... of the embodiment of the present invention for extracting nickel oxide using dilval can efficiently use ferronickel and close as a result,
Gold extract to obtain by wet processing high-purity nickel oxide (>99%), to while improving dilval utility value
Reduce the production cost of nickel, the nickel recovery of whole flow process it is high (>95%).
In another aspect of the present invention, the present invention proposes a kind of system for extracting nickel oxide using dilval.Root
According to the embodiment of the present invention, which includes：There is dilval entrance and nickel-containing molten iron to go out for melting appartus, the melting appartus
Mouthful, and suitable for the dilval is carried out melt processed, to obtain nickel-containing molten iron；It is atomized granulation device, the atomization system
There is grain device nickel-containing molten iron entrance and dilval particle outlet, the nickel-containing molten iron entrance to export phase with the nickel-containing molten iron
Even, and suitable for the nickel-containing molten iron is carried out atomization pelletization treatment, to obtain dilval particle；Selective oxidation roasting dress
It sets, the selective oxidation calciner has dilval particle entrance, oxidizing gas entrance and product of roasting outlet, institute
It states dilval particle entrance with the dilval particle outlet to be connected, and suitable for selecting the dilval particle
Property oxidizing roasting, to obtain product of roasting；Ammonia leaching-ammonia still process-calciner plant, the ammonia leaching-ammonia still process-calciner plant have roasting
Product inlet and nickel oxide outlet, the product of roasting entrance is connected with product of roasting outlet, and is suitable for the roasting
Product carries out ammonia leaching, ammonia still process and calcination processing, to obtain nickel oxide product.Inventor has found that the iron in dilval is main
Exist with metallic state, metallic iron can subsequently be not suitable for directly carrying out ammonia leaching with ammonia reaction, and metallic iron is converted to Fe3O4Afterwards
Ammonia will not be consumed.Then, dilval progress melt processed is first obtained into nickel-containing molten iron, nickel-containing molten iron pelletization treatment obtains ferronickel
Alloying pellet.Then, by iron selective oxidation at Fe after dilval Selective feeding being aoxidized3O4, nickel does not aoxidize, to obtain
To product of roasting；Product of roasting is finally obtained into nickel oxide product using ammonia leaching-ammonia still process-calcine technology of existing maturation.With it is existing
There is technology to compare, can efficiently use dilval by wet processing extract to obtain high-purity nickel oxide (>99%), to
Reduce the production cost of nickel while improving dilval utility value, the nickel recovery of whole flow process it is high (>95%).
The system for extracting nickel oxide using dilval of the embodiment of the present invention is described in detail below with reference to Fig. 2.
According to an embodiment of the invention, which includes：
Melting appartus 100：According to an embodiment of the invention, melting appartus 100 has dilval entrance 101 and contains ferronickel
Water out 102, and suitable for dilval is carried out melt processed, so as to obtain nickel-containing molten iron.
According to one embodiment of present invention, the concrete content of nickel and iron is not particularly restricted in dilval, ability
Field technique personnel can select according to actual needs, and according to a particular embodiment of the invention, dilval nickel content can be with
For 10~45wt%, iron content can be 60~90wt%.Inventor has found, high-purity in order to obtain in existing preparation process
Nickel, it usually needs the higher copper nickel of nickel content is used, causes raw material production cost higher, is not easy to purchase, and the present invention is to original
Nickel grade requirement threshold is relatively low in material, although the grade of nickel is relatively low in dilval, method using the present invention still can be with
The nickel oxide (nickel oxide nickel content is higher than 99% or more) of high-purity is prepared, to be reduced while widening raw material sources
The production cost of nickel.
According to still another embodiment of the invention, the condition of melt processed is not particularly restricted, those skilled in the art
It can be selected according to actual needs, according to a particular embodiment of the invention, melt processed can be at 1400~1600 DEG C
It carries out.
It is atomized granulation device 200, according to an embodiment of the invention, the granulation device 200 has nickel-containing molten iron entrance 201
With dilval particle outlet 202, nickel-containing molten iron entrance 201 and nickel-containing molten iron outlet 102 is connected, and be suitable for by nickel-containing molten iron into
Row pelletization treatment, so as to obtain dilval particle.Inventor has found, is pelletized as the nickel-containing molten iron to obtained by, from
And the contact area with oxidizing gas can be significantly improved, and then further increase the selective oxidation effect of dilval.
According to an embodiment of the invention, nickel-containing molten iron is subjected to atomization pelletization treatment, so as to obtain dilval
Grain.Inventor has found that, by carrying out atomization granulation to nickel-containing molten iron, ferronickel water is pelletized, so as to significantly improve and oxygen
The contact area of the property changed gas, and then further increase the selective oxidation effect of dilval particle.In the step, specifically
, atomization pelletization is to be smashed nickel-containing molten iron as fine droplet in atomizer using high pressure water flow or inert gas,
The dilval particle met the size requirements after cooling, drying, screening again, atomization mechanism are to work as high pressure water flow or inertia
When gas shock ferronickel melt, the surface energy of ferronickel melt is converted kinetic energy into, forms numerous fine particle.
According to still another embodiment of the invention, dilval grain graininess is not particularly restricted, people in the art
Member can be selected according to actual needs, and according to a particular embodiment of the invention, the grain size of dilval particle is not more than 0.5
Millimeter.Inventor has found that the dilval activity of the particle size range is higher, and during selective oxidation and oxidizing gas
Contact area is larger, so as to significantly improve selective oxidation effect.
Selective oxidation calciner 300, the selective oxidation calciner 300 have dilval particle entrance
301, oxidizing gas entrance 302 and product of roasting outlet 303, the dilval particle entrance 301 and the dilval
Particle outlet 202 is connected, and suitable for the dilval particle is selectively oxidized roasting, to obtain product of roasting.
Inventor has found that different to the affinity of oxygen with nickel using iron, being selectively oxidized roasting to dilval particle can make
Iron is oxidized to Fe3O4, and nickel is not oxidized, and during subsequent ammonia soaks, Fe3O4Ammonia of getting along well reacts, and ammonia is thus greatly decreased
Consumption.It should be noted that those skilled in the art can according to actual needs select selective oxidation roasting condition
It selects.According to an embodiment of the invention, metallic iron mass content is less than 5% in the product of roasting, and metallic nickel accounts for the ratio of full nickel
More than 95%, thus, it is possible to ensure that iron is oxidized to Fe3O4, and nickel is not oxidized.
Ammonia leaching-ammonia still process-calciner plant 400, the ammonia leaching-ammonia still process-calciner plant 400 have product of roasting entrance 401, oxygen
To change nickel outlet 402 and magnetic tailings exports 403, the product of roasting entrance 401 is connected with product of roasting outlet 303, and
Suitable for the product of roasting is carried out ammonia leaching, ammonia still process and calcination processing, to obtain nickel oxide product.In the step, specifically,
It will be leached in product of roasting again ammonia-sal volatile first, while being blown into oxidizing gas into solution, made in product of roasting
Nickel occurs complex reaction with ammonia and generates nickel ammine Ni (NH3)6 2+And entering solution, iron and gangue then stay in magnetic leached mud
In, ammonia still process operation, output basic carbonate nickel (OH) are carried out after leaching2.NiCO3, finally nickel oxide is obtained by calcining
NiO products.It should be noted that those skilled in the art can according to actual needs select ammonia leaching-ammonia still process-calcination condition
It selects.
The system according to the ... of the embodiment of the present invention for extracting nickel oxide using dilval can efficiently use ferronickel and close as a result,
Gold extract to obtain by wet processing high-purity nickel oxide (>99%), to while improving dilval utility value
Reduce the production cost of nickel, the nickel recovery of whole flow process it is high (>95%).
Below with reference to specific embodiment, present invention is described, it should be noted that these embodiments are only to describe
Property, without limiting the invention in any way.
Embodiment 1
By dilval (containing Ni 10.00%, Fe 90.%), fusing obtains containing ferronickel under the conditions of 1600 DEG C in melting furnace
Then the dilval particle that average grain diameter is 0.15mm is made in gained nickel-containing molten iron by water in atomization pellet fabrication device, then will
Dilval particle is selectively oxidized roasting, and the temperature control that the selective oxidation is roasted is 400 DEG C, oxygen concentration
It is calculated as 1% by percent by volume, roasting time 5min, metal Ferrum content 3.44% in obtained product of roasting, metallic nickel accounts for
Product of roasting is finally carried out ammonia leaching-ammonia still process-calcination processing and obtains nickel oxide product (NiO grades by the ratio 97.27% of full nickel
99.52%) it with magnetic tailings, is sent to as iron-smelting raw material after magnetic tailings magnetic separation, whole flow nickel recovery 97.36%.
Embodiment 2
By dilval (contain Ni 25.85%, Fe 74.53%) in melting furnace under the conditions of 1550 DEG C fusing obtain it is nickeliferous
Then the dilval particle that average grain diameter is 0.28mm is made, then in gained nickel-containing molten iron by molten iron in atomization pellet fabrication device
Dilval particle is selectively oxidized roasting, the temperature control that the selective oxidation is roasted is 300 DEG C, and oxygen is dense
Degree is calculated as 2% by percent by volume, roasting time 20min, metal Ferrum content 3.64% in obtained product of roasting, metallic nickel
The ratio 97.31% of full nickel is accounted for, product of roasting, which is finally carried out ammonia leaching-ammonia still process-calcination processing, obtains nickel oxide product (NiO product
99.12%) it with magnetic tailings, is sent to as iron-smelting raw material after magnetic tailings magnetic separation, whole flow nickel recovery 97.28% position.
Embodiment 3
By dilval (contain Ni 45.00%, Fe 60.00%) in melting furnace under the conditions of 1400 DEG C fusing obtain it is nickeliferous
Then the dilval particle that average grain diameter is 0.49mm is made, then in gained nickel-containing molten iron by molten iron in atomization pellet fabrication device
Dilval particle is selectively oxidized roasting, the temperature control that the selective oxidation is roasted is 500 DEG C, and oxygen is dense
Degree is calculated as 0.5% by percent by volume, roasting time 15min, metal Ferrum content 4.99% in obtained product of roasting, metal
Nickel accounts for the ratio 95.47% of full nickel, and product of roasting, which is finally carried out ammonia leaching-ammonia still process-calcination processing, obtains nickel oxide product (NiO
Grade 99.02%) and magnetic tailings, it is sent to as iron-smelting raw material after magnetic tailings magnetic separation, whole flow nickel recovery
95.28%.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office
It can be combined in any suitable manner in one or more embodiments or example.In addition, without conflicting with each other, the skill of this field
Art personnel can tie the feature of different embodiments or examples described in this specification and different embodiments or examples
It closes and combines.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, changes, replacing and modification.
What present disclosure referred to is exemplary embodiment, in the protection domain for not departing from claims and defining
In the case of, each embodiment of the application can be made various changes and modifications.Therefore, described embodiment is intended to contain
Lid falls all such changes, modifications and deformation in the protection domain of the appended claims.In addition, institute unless the context
Outside referring to, the word occurred in the singular includes plural form, and vice versa.In addition, unless stated otherwise, then any embodiment
All or part of in combination with any other embodiment all or part of use.
Claims (7)
1. a kind of method for extracting nickel oxide using dilval, which is characterized in that include the following steps：
(1) dilval is subjected to melt processed, obtains nickel-containing molten iron；
(2) nickel-containing molten iron is subjected to pelletization treatment, obtains dilval particle；
(3) dilval particle is selectively oxidized roasting, iron is oxidized to Fe3O4, obtain product of roasting, the roasting production
Metallic iron mass content is less than 5% in object, and the ratio that metallic nickel accounts for full nickel is more than 95%；
(4) product of roasting is subjected to ammonia leaching-ammonia still process-calcination processing and obtains nickel oxide product.
2. according to the method described in claim 1, it is characterized in that, iron content is 60~90wt% in the dilval.
3. according to the method described in claim 1, it is characterized in that, nickel content is 10~45wt% in the dilval.
4. according to the method described in claim 1, it is characterized in that, in step (1), the temperature range of the melt processed is
1400~1600 DEG C.
5. according to the method described in claim 1, it is characterized in that, in step (2), the mode of the pelletization treatment is selected as mist
Change granulation.
6. according to the method described in claim 1, it is characterized in that, in step (2), by the grain size of the dilval particle
Control is≤0.5 millimeter.
7. according to the method described in claim 1, it is characterized in that, in step (3), temperature that the selective oxidation is roasted
Degree control is 300-500 DEG C, and oxygen concentration is calculated as 0.5%-2%, roasting time 5-20min by percent by volume so that roasting
It burns metallic iron mass content in product and is less than 5%, the ratio that metallic nickel accounts for full nickel is more than 95%.
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| CN112723428B (en) * | 2020-12-18 | 2023-03-28 | 湖南德景源科技有限公司 | Method for preparing battery-grade nickel oxide by using metallic nickel |
| CN112941313A (en) * | 2021-01-29 | 2021-06-11 | 广东邦普循环科技有限公司 | Recovery method and application of rough ferronickel alloy |
| CN113265532B (en) * | 2021-04-09 | 2023-01-13 | 广东邦普循环科技有限公司 | Method for leaching nickel-ammonia solution from nickel-iron alloy by wet method and application |
| CN113399115B (en) * | 2021-07-29 | 2023-04-11 | 山东金玺泰矿业有限公司 | Iron ore separation and purification equipment for mineral production |
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