CN106086469B - 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
- Publication number
- CN106086469B CN106086469B CN201610652611.3A CN201610652611A CN106086469B CN 106086469 B CN106086469 B CN 106086469B CN 201610652611 A CN201610652611 A CN 201610652611A CN 106086469 B CN106086469 B CN 106086469B
- Authority
- CN
- China
- Prior art keywords
- nickel
- roasting
- product
- ore
- reduction
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- 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
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The present invention discloses a kind of method and system for extracting nickel oxide using lateritic nickel ore.It the described method comprises the following steps：(1) lateritic nickel ore, reducing agent and additive are mixed, carries out pelletizing processing, obtain mixing pelletizing；(2) mixing pelletizing is restored, mill ore magnetic selection processing, obtains ferronickel powder and tailings；(3) ferronickel powder 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 mixed pelletizing device, reduction apparatus, mill ore magnetic selection device, calciner and ammonia to soak ammonia still process calciner plant.The present invention is using low nickel minerals as raw material, by carrying out drastic reduction to nickel in the direct-reduction of early period, obtained ferronickel powder roasts to obtain iron oxide and the product of roasting of elemental nickel using selective oxidation, product of roasting obtains the nickel oxide product of high added value using wet-treating, and nickel recovery is up to 90% or more.
Description
Technical field
The invention belongs to non-ferrous metal extraction field more particularly to it is a kind of using lateritic nickel ore 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 lateritic nickel ore is current prevailing technology, and wherein reduction roasting-mill ore magnetic selection has become research
Hot spot.Using lateritic nickel ore as raw material, coal dust is reducing agent, under the high temperature conditions that the nickel in ore is complete using direct reduction equipment
Portion is reduced into metallic nickel, and iron makes nickel be enriched in ferronickel powder according to mixed carbon comtent partial reduction at metallic iron, then through magnetic separation separation.Mesh
Preceding to ferronickel powder, there are no large-scale commercial Applications, study it and also only reside within using its briquetting as the original of pneumatic steelmaking
Material is obtained using molten point of processing in the level after ferronickel powder as the raw material of smelting stainless steel, and value-added content of product is not high.
If carrying nickel using ammonia soaking technology processing ferronickel powder, it is different from the reduced calcine of Caron techniques, the iron almost all in ferronickel powder
Exist in the form of metallic iron, leaching process can consume a large amount of ammonia leaching agent, difficulty is brought to the leaching of nickel.
Existing lateritic nickel ore treatment technology is further improved as a result,.
Invention content
In order to solve the problems, such as that nickel recovery is low in wet method ammonia leaching processing lateritic nickel ore in the prior art and pyrogenic attack is red
The low problem of native nickel minerals handicraft product ferronickel powder utility value, the present invention propose a kind of method and system of processing lateritic nickel ore,
First lateritic nickel ore being handled to obtain ferronickel powder by direct-reduction-mill ore magnetic selection, ferronickel powder is roasted using selective oxidation,
Nickel is more than to the affinity of oxygen using iron, metallic iron is made to be oxidized to Fe3O4, in selective oxidation roasting, metallic nickel does not aoxidize simultaneously,
Product of roasting obtains nickel oxide product using ammonia leaching-ammonia still process-calcine technology of existing maturation.
In one aspect of the invention, the present invention proposes a kind of method for extracting nickel oxide using lateritic nickel ore, according to
The embodiment of the present invention, this method include：
(1) lateritic nickel ore, reducing agent and additive are mixed, carries out pelletizing processing, obtain mixing pelletizing；
(2) mixing pelletizing is restored, mill ore magnetic selection processing, obtains ferronickel powder and tailings；
(3) ferronickel powder is selectively oxidized roasting, metallic iron is made to be oxidized to Fe3O4And metallic nickel does not aoxidize, and is roasted
Burn product；
(4) product of roasting is subjected to ammonia leaching-ammonia still process-calcination processing, obtains nickel oxide product.
The method according to the ... of the embodiment of the present invention for extracting nickel oxide using lateritic nickel ore as a result, can efficiently use laterite
Nickel minerals extracts nickel oxide by fiery wet method combined process, and after whole operation flow, nickel recovery is up to 90% or more.
In addition, it is according to the above embodiment of the present invention using lateritic nickel ore extract nickel oxide method can also have it is as follows
Additional technical characteristic：
In some embodiments of the invention, in step (1), the additive is selected from alkali metal oxide, alkali gold
Belong at least one of salt, alkaline earth oxide and alkali salt.
In some embodiments of the invention, in step (1), lateritic nickel ore：Reducing agent：The mass ratio of additive three
It is 100：5~25：3~15.
In some embodiments of the invention, in step (2), reduction temperature is controlled at 1250 DEG C~1320 DEG C, also
The former time is 20~40min so that the degree of metalization of iron of the mixing pelletizing after reduction is 50%~60%, as a result,
On the one hand it can ensure that the nickel Restore All in lateritic nickel ore is metallic state；On the other hand a part of iron can be controlled with FeO's
Form is present in mill ore magnetic selection tailings to be detached with ferronickel powder, reduces subsequent material treating capacity.
In some embodiments of the invention, it is 300-500 DEG C by calcination temperature control in step (3), oxygen concentration
It is calculated as 0.5%-2%, roasting time 5-20min by percent by volume so that metallic iron mass content is less than in product of roasting
5%, the ratio that metallic nickel accounts for full nickel is more than 95%.Thus, it is possible to ensure that iron is oxidized to Fe3O4, and nickel is not oxidized.
Lateritic nickel ore of the present invention refers to the low nickel minerals that nickel content is 0.5~3.0wt% in lateritic nickel ore.
In another aspect of the present invention, the present invention proposes a kind of system for extracting nickel oxide using lateritic nickel ore, root
According to the embodiment of the present invention, which includes：
There is lateritic nickel ore entrance, carbonaceous reducing agent entrance, additive to enter for mixed pelletizing device, the mixed pelletizing device
Mouth and the outlet of mixing pelletizing, and be suitable for by lateritic nickel ore, carbonaceous reducing agent and additive progress mixed pelletizing, to be mixed
Pelletizing；
Direct-reduction-mill ore magnetic selection device, the direct-reduction-mill ore magnetic selection device have mixing pelletizing entrance, ferronickel
Powder exports and tailings outlet, and the mixing pelletizing entrance is connected with mixing pelletizing outlet, and is suitable for the mixing pelletizing
It carries out being reduced directly-mill ore magnetic selection processing, to obtain ferronickel powder and tailings；
There is ferronickel powder entrance, oxidizing gas to enter for selective oxidation calciner, the selective oxidation calciner
Mouth and product of roasting outlet, the ferronickel powder entrance and ferronickel powder outlet, and be suitable for ferronickel powder progress selectivity
Oxidizing roasting, to obtain product of roasting；
There is product of roasting entrance and nickel oxide to go out for ammonia leaching-ammonia still process-calciner plant, the ammonia leaching-ammonia still process-calciner plant
Mouthful, the product of roasting entrance and product of roasting outlet are connected, and suitable for by product of roasting progress ammonia leaching, ammonia still process and
Calcination processing, to obtain nickel oxide product.
Preferably, the reduction apparatus is any one of rotary hearth furnace, rotary kiln, car-bottom furnace, tunnel oven.
The present invention to nickel in the reduction of early period by carrying out drastic reduction, obtained ferronickel powder after mill choosing, using
Selective oxidation roasts to obtain iron oxide and the product of roasting of elemental nickel, and product of roasting obtains high added value using wet-treating
Nickel oxide product, and nickel recovery is up to 90% or more；Meanwhile the present invention can be made using low-grade laterite nickel ore as raw material
It is standby to obtain the nickel of high-purity, to significantly reduce cost of material while widening nickel raw material sources；The present invention uses alkali
Metallic compound or alkaline earth oxide can reduce minimum temperature of reduction as additive so that the reduction item of lateritic nickel ore
Part is greatly improved, and improves the reduction of nickel.
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 lateritic nickel ore；
Fig. 2 is the system structure diagram according to an embodiment of the invention that nickel oxide is extracted using lateritic nickel ore.
Specific implementation mode
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to for explaining the present invention, and is not considered as limiting the invention.
In the description of the present invention, it is to be understood that, term "center", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside", " up time
The orientation or positional relationship of the instructions such as needle ", " counterclockwise ", " axial direction ", " radial direction ", " circumferential direction " be orientation based on ... shown in the drawings or
Position relationship is merely for convenience of description of the present invention and simplification of the description, and does not indicate or imply the indicated device or element must
There must be specific orientation, with specific azimuth configuration and operation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are used for description purposes only, it is not understood to indicate or imply relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include at least one this feature.In the description of the present invention, the meaning of " plurality " is at least two, such as two, three
It is a etc., unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；Can be that machinery connects
It connects, can also be electrical connection；It can be directly connected, can also can be indirectly connected through an intermediary in two elements
The interaction relationship of the connection in portion or two elements, unless otherwise restricted clearly.For those of ordinary skill in the art
For, the specific meanings of the above terms in the present invention can be understood according to specific conditions.
In the present invention unless specifically defined or limited otherwise, fisrt feature can be with "above" or "below" second feature
It is that the first and second features are in direct contact or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature be directly above or diagonally above the second feature, or be merely representative of
Fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be
One feature is directly under or diagonally below the second feature, or is merely representative of fisrt feature level height and is less than second feature.
In one aspect of the invention, the present invention proposes a kind of method for extracting nickel oxide using lateritic nickel ore.According to
The embodiment of the present invention, this method include：
(1) lateritic nickel ore, reducing agent and additive are mixed, carries out pelletizing processing, obtain mixing pelletizing；
(2) mixing pelletizing is restored, mill ore magnetic selection processing, obtains ferronickel powder and tailings；
(3) ferronickel powder 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, carry out lateritic nickel ore first being reduced directly first-mill ore magnetic selection handles to obtain ferronickel powder, due to
Iron in ferronickel powder mainly exists with metallic state, follow-up to be not suitable for directly carrying out ammonia leaching；It then, will be after ferronickel powder selective oxidation
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.Compared with prior art, on the one hand lateritic nickel ore is obtained by wet-treating
To the nickel oxide product of high added value.Another aspect whole flow process nickel recovery is high, can reach 90% or more, and the prior art pair
The nickel recovery of lateritic nickel ore reduction roasting-ammonia leaching technique 75% hereinafter, its innovation point be in the present invention can be
Drastic reduction is carried out to nickel in the direct-reduction of early period.
The method for extracting nickel oxide using lateritic nickel ore 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：Lateritic nickel ore, carbonaceous reducing agent and additive are subjected to mixed pelletizing.
According to an embodiment of the invention, lateritic nickel ore, carbonaceous reducing agent and additive are subjected to mixed pelletizing, so as to
Obtain mixing pelletizing.
According to one embodiment of present invention, the mixed proportion of lateritic nickel ore, carbonaceous reducing agent and additive is not by spy
It not limiting, those skilled in the art can select according to actual needs, according to a particular embodiment of the invention, laterite nickel
Mine, carbonaceous reducing agent and additive can be 100 according to mass ratio:5~25:3~15 are mixed.Wherein, carbonaceous reducing agent
Additive amount not preferably less than 5% parts by weight can influence the reduction effect of nickel if being less than this value, reduce the rate of recovery of nickel.Carbonaceous is also
The additive amount of former agent should not be higher than 25% parts by weight, on the one hand cannot improve the technical-economic index of nickel higher than this value, and can make
The coal-forming wasting of resources improves production cost；Also excessive iron reduction can on the other hand entered in ferronickel powder, is follow-up ferronickel powder
Selective oxidation bring burden.The dosage of additive be intended to auxiliary lateritic nickel ore in nickel reduction, found in experiment it is excessively high or
Too low dosage can all reduce the reduction effect of nickel.Specifically, lateritic nickel ore, carbonaceous reducing agent and additive are mixed it
Before, lateritic nickel ore, carbonaceous reducing agent and additive are crushed in advance.
According to still a further embodiment, nickel content is not particularly restricted in lateritic nickel ore, people in the art
Member can be selected according to actual needs, according to a particular embodiment of the invention, in lateritic nickel ore nickel content be 0.5~
3.0wt%.The nickel of high-purity in order to obtain in existing synthesis technology as a result, it usually needs the higher nickel minerals containing nickel content is used,
Cause raw material production cost higher, is not easy to purchase, and nickel grade requirement threshold is relatively low in centering nickel minerals of the present invention, using nickel content
Only the nickel of high-purity can be prepared as the raw material for preparing nickel in the lateritic nickel ore of 0.5~3.0wt%, to widen
Cost of material is significantly reduced while nickel raw material sources.
According to still another embodiment of the invention, the concrete type of additive 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, additive can be to be aoxidized selected from alkali metal
At least one of object, alkali metal salt, alkaline earth oxide and alkali salt.Alkali or alkaline earth metal in additive
Oxide can displace NiO from forsterite or fayalite, to improve the activity of NiO, reduce minimum temperature of reduction so that
The reducing condition of lateritic nickel ore is greatly improved, and improves the reduction of nickel.
S200：Mixing pelletizing is carried out to be reduced directly-mill ore magnetic selection processing.
According to an embodiment of the invention, mixing pelletizing is carried out being reduced directly-mill ore magnetic selection processing, so as to obtain nickel
Iron powder and tailings.
According to one embodiment of present invention, the direct-reduction for mixing pelletizing-mill ore magnetic selection processing may be used directly
What the combined apparatus of reduction apparatus and mill ore magnetic selection device carried out, according to a particular embodiment of the invention, reduction apparatus can be
Selected from any one of rotary hearth furnace, rotary kiln, car-bottom furnace and tunnel oven.It should be noted that those skilled in the art can root
The condition of direct-reduction and mill ore magnetic selection processing is selected according to actual needs.
According to one embodiment of present invention, the degree of metalization of iron of the mixing pelletizing after direct-reduction is 50%
Between~60%, it on the one hand can ensure that the nickel Restore All in lateritic nickel ore is metallic state as a result,；On the other hand it can control
A part of iron is present in the form of FeO in mill ore magnetic selection tailings to be detached with ferronickel powder, reduces subsequent material treating capacity.
S300：Ferronickel powder is selectively oxidized roasting.
According to an embodiment of the invention, ferronickel powder is selectively oxidized roasting, so as to obtain product of roasting.Hair
A person of good sense has found that different to the affinity of oxygen with nickel using iron, being selectively oxidized roasting to ferronickel powder can be such that iron is oxidized to
Fe3O4, and nickel is not oxidized, and during subsequent ammonia soaks, Fe3O4Ammonia of getting along well reacts, and the consumption of ammonia is thus greatly decreased.
It should be noted that those skilled in the art can according to actual needs select selective oxidation roasting condition.According to
The embodiment of the present invention, metallic iron mass content is less than 5% in the product of roasting, and 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 lateritic nickel ore can efficiently use laterite nickel as a result,
Mine extracts nickel oxide by fiery wet method combined process, the nickel recovery of whole flow process it is high (>90%).
In another aspect of the present invention, the present invention proposes a kind of system for extracting nickel oxide using lateritic nickel ore.Root
According to the embodiment of the present invention, which includes：Mixed pelletizing device, the mixed pelletizing device have lateritic nickel ore entrance, carbon
Matter reducing agent entrance, additive entrance and the outlet of mixing pelletizing, and suitable for carrying out lateritic nickel ore, carbonaceous reducing agent and additive
Mixed pelletizing, to obtain mixing pelletizing；Direct-reduction-mill ore magnetic selection device, the direct-reduction-mill ore magnetic selection device have
Pelletizing entrance, ferronickel powder outlet and tailings outlet are mixed, the mixing pelletizing entrance is connected with mixing pelletizing outlet, and suitable
In the mixing pelletizing be reduced directly-mill ore magnetic selection processing, to obtain ferronickel powder and tailings；Selective oxidation roasts
Device, the selective oxidation calciner have ferronickel powder entrance, oxidizing gas entrance and product of roasting outlet, the nickel
Iron powder entrance is connected with ferronickel powder outlet, and suitable for the ferronickel powder is selectively oxidized roasting, to be roasted
Burn product；There is product of roasting entrance and nickel oxide to export for ammonia leaching-ammonia still process-calciner plant, the ammonia leaching-ammonia still process-calciner plant,
The product of roasting entrance is connected with product of roasting outlet, and suitable for the product of roasting is carried out ammonia leaching, ammonia still process and is forged
Burning processing, to obtain nickel oxide product.
Inventor has found, carry out lateritic nickel ore first being reduced directly first-mill ore magnetic selection handles to obtain ferronickel powder, due to
Iron in ferronickel powder mainly exists with metallic state, follow-up to be not suitable for directly carrying out ammonia leaching；It then, will be after ferronickel powder selective oxidation
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.Compared with prior art, on the one hand ferronickel powder is obtained by wet-treating
The nickel oxide product of high added value, and the prior art is only to handle the direct briquetting of ferronickel powder or continue the molten ferronickel powder that is divided into make
To continue the raw material of smelting stainless steel.Another aspect whole flow process nickel recovery is high, can reach 90% or more, and the prior art pair
The nickel recovery of lateritic nickel ore reduction roasting-ammonia leaching technique 75% hereinafter, its innovation point be in the present invention can be
Drastic reduction is carried out to nickel in the direct-reduction of early period.
The system for extracting nickel oxide using lateritic nickel ore 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：
Mixed pelletizing device 100：According to an embodiment of the invention, mixed pelletizing device 100 has lateritic nickel ore entrance
101, carbonaceous reducing agent entrance 102, additive entrance 103 and mixing pelletizing outlet 104, and be suitable for so as to obtain mixing ball
Group.
According to one embodiment of present invention, the mixed proportion of lateritic nickel ore, carbonaceous reducing agent and additive is not by spy
It not limiting, those skilled in the art can select according to actual needs, according to a particular embodiment of the invention, laterite nickel
Mine, carbonaceous reducing agent and additive can be 100 according to mass ratio:5~25:3~15 are mixed.Wherein, carbonaceous reducing agent
Additive amount not preferably less than 5% parts by weight can influence the reduction effect of nickel if being less than this value, reduce the rate of recovery of nickel.Carbonaceous is also
The additive amount of former agent should not be higher than 25% parts by weight, on the one hand cannot improve the technical-economic index of nickel higher than this value, and can make
The coal-forming wasting of resources improves production cost；Also excessive iron reduction can on the other hand entered in ferronickel powder, is follow-up ferronickel powder
Selective oxidation bring burden.The dosage of additive be intended to auxiliary lateritic nickel ore in nickel reduction, found in experiment it is excessively high or
Too low dosage can all reduce the reduction effect of nickel.Specifically, lateritic nickel ore, carbonaceous reducing agent and additive are mixed it
Before, lateritic nickel ore, carbonaceous reducing agent and additive are crushed in advance.
According to still a further embodiment, nickel content is not particularly restricted in lateritic nickel ore, people in the art
Member can be selected according to actual needs, according to a particular embodiment of the invention, in lateritic nickel ore nickel content be 0.5~
3.0wt%.The nickel of high-purity in order to obtain in existing synthesis technology as a result, it usually needs the higher nickel minerals containing nickel content is used,
Cause raw material production cost higher, is not easy to purchase, and nickel grade requirement threshold is relatively low in centering nickel minerals of the present invention, using nickel content
Only the nickel of high-purity can be prepared as the raw material for preparing nickel in the lateritic nickel ore of 0.5~3.0wt%, to widen
Cost of material is significantly reduced while nickel raw material sources.
According to still another embodiment of the invention, the concrete type of additive 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, additive can be to be aoxidized selected from alkali metal
At least one of object, alkali metal salt, alkaline earth oxide and alkali salt.Alkali or alkaline earth metal in additive
Oxide can displace NiO from forsterite or fayalite, to improve the activity of NiO, reduce minimum temperature of reduction so that
The reducing condition of lateritic nickel ore is greatly improved, and improves the reduction of nickel.
Direct-reduction-mill ore magnetic selection device 200：According to an embodiment of the invention, direct-reduction-mill ore magnetic selection device 200
With mixing pelletizing entrance 201, ferronickel powder outlet 202 and tailings outlet 203, mixing pelletizing entrance 201 and the outlet of mixing pelletizing
104 are connected, and carry out being reduced directly-mill ore magnetic selection processing suitable for that will mix pelletizing, so as to obtain ferronickel powder and tailings.
According to one embodiment of present invention, the direct-reduction for mixing pelletizing-mill ore magnetic selection processing may be used directly
What the combined apparatus of reduction apparatus and mill ore magnetic selection device carried out, i.e., the reduzate of reduction apparatus exports direct unicom ore grinding magnetic
Screening device reduzate entrance.According to a particular embodiment of the invention, reduction apparatus can be selected from rotary hearth furnace, rotary kiln, vehicle
Any one of bottom stove and tunnel oven.It should be noted that those skilled in the art can be according to actual needs to direct-reduction
It is selected with the condition of mill ore magnetic selection processing.The combined apparatus of above-mentioned direct reduction unit and mill ore magnetic selection device, only originally
One preferred embodiment of invention, those skilled in the art can also be from rotary hearth furnace, rotary kiln, car-bottom furnace and tunnel ovens optionally
It is a kind of to be used as reduction apparatus, the reduction apparatus that there is mixing pelletizing entrance and reduzate outlet, mix pelletizing entrance and described
Pelletizing outlet is mixed to be connected.Mill ore magnetic selection device has reduzate entrance, ferronickel powder outlet and tailings outlet, wherein also originating in
Object entrance is connected with the outlet of the reduzate of reduction apparatus.Invention is not limited thereto.
According to one embodiment of present invention, reduction temperature being controlled at 1250 DEG C~1320 DEG C, the recovery time is 20~
40min so that the degree of metalization of iron of the mixing pelletizing after direct-reduction, as a result, on the one hand can between 50%~60%
To ensure the nickel Restore All in lateritic nickel ore as metallic state；On the other hand a part of iron can be controlled in the form of FeO to exist
It is detached with ferronickel powder in mill ore magnetic selection tailings, reduces subsequent material treating capacity.
Selective oxidation calciner 300, the selective oxidation calciner 300 have ferronickel powder entrance 301, oxidation
Property gas access 302 and product of roasting outlet 303, the ferronickel powder entrance 301 and the ferronickel powder outlet 202 be connected, and fit
In the ferronickel powder is selectively oxidized roasting, to obtain product of roasting.Inventor has found, using iron and nickel to oxygen
Affinity is different, and being selectively oxidized roasting to ferronickel powder can make iron be oxidized to Fe3O4, and nickel is not oxidized, subsequent
During ammonia leaching, Fe3O4Ammonia of getting along well reacts, and the consumption of ammonia is thus greatly decreased.It should be noted that those skilled in the art
Selective oxidation roasting condition can be selected according to actual needs.According to an embodiment of the invention, by calcination temperature control
It is made as 300-500 DEG C, oxygen concentration is calculated as 0.5%-2%, roasting time 5-20min by percent by volume so that 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%, 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 lateritic nickel ore can efficiently use and can have as a result,
Effect extracts nickel oxide using lateritic nickel ore by fiery wet method combined process, the nickel recovery of whole flow process it is high (>90%).
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 lateritic nickel ore (containing Ni 3.0%), carbonaceous reducing agent and lime in mass ratio 100:15:10 carry out mixed pelletizing
Mixing pelletizing is obtained, by mixing pelletizing in tunnel oven, 40min is heated at 1320 DEG C, reduction roasting obtains metallized pellet (ball
Group's degree of metalization 60.00%), then, mill ore magnetic selection is carried out to metallized pellet, obtains ferronickel powder and (contain 5.72%TFe
64.83%), then by ferronickel powder at 350 DEG C, oxygen concentration is calculated as 1% time selective oxidation by percent by volume and roasts, roasting
Time is 20min, and metal Ferrum content 2.38% in obtained product of roasting, metallic nickel accounts for the ratio 97.06% of full nickel, finally will
Product of roasting carries out ammonia leaching-ammonia still process-calcination processing and obtains nickel oxide product and magnetic tailings, and conduct is sent to after magnetic tailings magnetic separation
Iron-smelting raw material, whole flow nickel recovery 92.67%.
Embodiment 2
By lateritic nickel ore (containing Ni 1.12%), carbonaceous reducing agent and sodium carbonate in mass ratio 100:5:5 carry out mixed pelletizing
Mixing pelletizing is obtained, by mixing pelletizing in rotary hearth furnace, 20min is heated at 1300 DEG C, reduction roasting obtains metallized pellet (ball
Group's degree of metalization 50.00%), then, mill ore magnetic selection is carried out to metallized pellet, obtains ferronickel powder (3.83%TFe containing Ni
75.83%), then by ferronickel powder at 300 DEG C, oxygen concentration is calculated as 0.5% time selective oxidation by percent by volume and roasts, roasting
The burning time is 15min, and metal Ferrum content 4.13% in obtained product of roasting, metallic nickel accounts for the ratio 95.08% of full nickel, finally
Product of roasting is subjected to ammonia leaching-ammonia still process-calcination processing and obtains nickel oxide product and magnetic tailings, work is sent to after magnetic tailings magnetic separation
For iron-smelting raw material, whole flow nickel recovery 91.52%.
Embodiment 3
By lateritic nickel ore (containing Ni 0.5%), carbonaceous reducing agent and lime stone in mass ratio 100:10:15, which carry out mixing, makes
Ball obtains mixing pelletizing, by mixing pelletizing in rotary kiln, 30min is heated at 1280 DEG C, reduction roasting obtains metallized pellet
(pelletizing degree of metalization 53.33%) then carries out mill ore magnetic selection to metallized pellet, obtains ferronickel powder (2.83%TFe containing Ni
85.83%), then by ferronickel powder at 450 DEG C, oxygen concentration is calculated as 2% time selective oxidation by percent by volume and roasts, roasting
Time is 10min, and metal Ferrum content 3.28% in obtained product of roasting, metallic nickel accounts for the ratio 96.18% of full nickel, finally will
Product of roasting carries out ammonia leaching-ammonia still process-calcination processing and obtains nickel oxide product and magnetic tailings, and conduct is sent to after magnetic tailings magnetic separation
Iron-smelting raw material, whole flow nickel recovery 94.11%.
Embodiment 4
By lateritic nickel ore (containing Ni 1.82%), carbonaceous reducing agent and barium monoxide in mass ratio 100:25:3, which carry out mixing, makes
Ball obtains mixing pelletizing, by mixing pelletizing in car-bottom furnace, 30min is heated at 1250 DEG C, reduction roasting obtains metallized pellet
(pelletizing degree of metalization 56.79%) then carries out mill ore magnetic selection to metallized pellet, obtains ferronickel powder and (contains 6.82%TFe
65.64%), then by ferronickel powder at 500 DEG C, oxygen concentration is calculated as 1.5% time selective oxidation by percent by volume and roasts, roasting
The burning time is 5min, and metal Ferrum content 3.99% in obtained product of roasting, metallic nickel accounts for the ratio 95.19% of full nickel, finally
Product of roasting is subjected to ammonia leaching-ammonia still process-calcination processing and obtains nickel oxide product and magnetic tailings, work is sent to after magnetic tailings magnetic separation
For iron-smelting raw material, whole flow nickel recovery 93.62%.
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.
Claims (6)
1. a kind of method for extracting nickel oxide using lateritic nickel ore, which is characterized in that include the following steps：
(1) lateritic nickel ore, reducing agent and additive are mixed, carries out pelletizing processing, obtain mixing pelletizing；
(2) mixing pelletizing is restored, mill ore magnetic selection processing, obtains ferronickel powder and tailings；
(3) ferronickel powder is selectively oxidized roasting, iron is made to be oxidized to Fe3O4, obtain product of roasting, metal in product of roasting
Weight of iron content is less than 5%, 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, obtains nickel oxide product.
2. according to the method described in claim 1, it is characterized in that, nickel content is 0.5~3.0wt% in the lateritic nickel ore.
3. according to the method described in claim 1, it is characterized in that, in step (1), the additive is selected from alkali metal oxygen
At least one of compound, alkali metal salt, alkaline earth oxide and alkali salt.
4. according to the method described in claim 1, it is characterized in that, in step (1), lateritic nickel ore：Reducing agent：Additive three
The mass ratio of person is 100：5~25：3~15.
5. according to the method described in claim 1, it is characterized in that, in step (2), by reduction temperature control 1250 DEG C~
1320 DEG C, the recovery time is 20~40min so that the degree of metalization of the iron of the mixing pelletizing after reduction is 50%~
60%.
6. it is 300-500 by calcination temperature control according to the method described in claim 1, it is characterized in that, in step (3)
DEG C, oxygen concentration is calculated as 0.5%-2%, roasting time 5-20min by percent by volume so that metal irony in product of roasting
It measures content and is less than 5%, the ratio that metallic nickel accounts for full nickel is more than 95%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610652611.3A CN106086469B (en) | 2016-08-09 | 2016-08-09 | A kind of method and system for extracting nickel oxide using lateritic nickel ore |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610652611.3A CN106086469B (en) | 2016-08-09 | 2016-08-09 | A kind of method and system for extracting nickel oxide using lateritic nickel ore |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106086469A CN106086469A (en) | 2016-11-09 |
| CN106086469B true CN106086469B (en) | 2018-08-28 |
Family
ID=57456561
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610652611.3A Active CN106086469B (en) | 2016-08-09 | 2016-08-09 | A kind of method and system for extracting nickel oxide using lateritic nickel ore |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106086469B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106868309A (en) * | 2017-03-24 | 2017-06-20 | 江苏省冶金设计院有限公司 | The system and method for Treatment of Copper iron powder |
| CN106834723A (en) * | 2017-03-24 | 2017-06-13 | 江苏省冶金设计院有限公司 | The system and method for processing metallurgical slag |
| CN106957952A (en) * | 2017-04-27 | 2017-07-18 | 江苏省冶金设计院有限公司 | Handle the method and system of lateritic nickel ore |
| CN107574278B (en) * | 2017-07-27 | 2019-12-17 | 武汉科技大学 | Method for preparing ferronickel by enriching nickel from laterite-nickel ore |
| CN109085031B (en) * | 2018-07-10 | 2020-11-10 | 济南裕兴化工有限责任公司 | Method for determining Van der Waals adsorption organic matter of reduced iron powder in titanium white industry, and establishment and application of quality detection system thereof |
| CN110983043B (en) * | 2019-11-28 | 2021-11-23 | 武汉科技大学 | Method for preparing high-grade ferronickel from medium-low grade laterite-nickel ore |
| 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 |
| CN114934186A (en) * | 2022-06-27 | 2022-08-23 | 安徽理工大学 | Method for enriching nickel-cobalt metal in fayalite type furnace slag |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4125588A (en) * | 1977-08-01 | 1978-11-14 | The Hanna Mining Company | Nickel and magnesia recovery from laterites by low temperature self-sulfation |
| CN101020957A (en) * | 2006-12-22 | 2007-08-22 | 昆明贵金属研究所 | Process of fast reducing carbon-containing red mud nickel ore pellet to beneficiate nickel in a bottom rotating furnace |
| CN101230422A (en) * | 2008-02-02 | 2008-07-30 | 贵研铂业股份有限公司 | Method for enriching nickel from lateritic nickel with co-production of iron-oxide red |
| CN101245414A (en) * | 2007-02-15 | 2008-08-20 | 邓彤 | Method for extracting metal from laterite mine |
| CN101423897A (en) * | 2008-11-26 | 2009-05-06 | 东北大学 | Method for extracting nickel oxide from lateritic nickel |
| CN102851490A (en) * | 2012-08-30 | 2013-01-02 | 北京矿冶研究总院 | Method for preparing high-quality calcine by fluidized reduction roasting of nickel oxide ore |
| CN103667675A (en) * | 2013-08-01 | 2014-03-26 | 北京神雾环境能源科技集团股份有限公司 | Treatment method of laterite-nickel ore |
| CN103667742A (en) * | 2013-09-16 | 2014-03-26 | 北京神雾环境能源科技集团股份有限公司 | Treatment method of laterite-nickel ore |
| CN105039683A (en) * | 2015-08-12 | 2015-11-11 | 湖南长拓高科冶金有限公司 | Roasting-ammonia leaching processing method for brown iron type laterite nickel ore |
| CN206143292U (en) * | 2016-08-09 | 2017-05-03 | 江苏省冶金设计院有限公司 | System for utilize laterite -nickel ore ore deposit to draw nickel oxide |
-
2016
- 2016-08-09 CN CN201610652611.3A patent/CN106086469B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4125588A (en) * | 1977-08-01 | 1978-11-14 | The Hanna Mining Company | Nickel and magnesia recovery from laterites by low temperature self-sulfation |
| CN101020957A (en) * | 2006-12-22 | 2007-08-22 | 昆明贵金属研究所 | Process of fast reducing carbon-containing red mud nickel ore pellet to beneficiate nickel in a bottom rotating furnace |
| CN101245414A (en) * | 2007-02-15 | 2008-08-20 | 邓彤 | Method for extracting metal from laterite mine |
| CN101230422A (en) * | 2008-02-02 | 2008-07-30 | 贵研铂业股份有限公司 | Method for enriching nickel from lateritic nickel with co-production of iron-oxide red |
| CN101423897A (en) * | 2008-11-26 | 2009-05-06 | 东北大学 | Method for extracting nickel oxide from lateritic nickel |
| CN102851490A (en) * | 2012-08-30 | 2013-01-02 | 北京矿冶研究总院 | Method for preparing high-quality calcine by fluidized reduction roasting of nickel oxide ore |
| CN103667675A (en) * | 2013-08-01 | 2014-03-26 | 北京神雾环境能源科技集团股份有限公司 | Treatment method of laterite-nickel ore |
| CN103667742A (en) * | 2013-09-16 | 2014-03-26 | 北京神雾环境能源科技集团股份有限公司 | Treatment method of laterite-nickel ore |
| CN105039683A (en) * | 2015-08-12 | 2015-11-11 | 湖南长拓高科冶金有限公司 | Roasting-ammonia leaching processing method for brown iron type laterite nickel ore |
| CN206143292U (en) * | 2016-08-09 | 2017-05-03 | 江苏省冶金设计院有限公司 | System for utilize laterite -nickel ore ore deposit to draw nickel oxide |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106086469A (en) | 2016-11-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106086469B (en) | A kind of method and system for extracting nickel oxide using lateritic nickel ore | |
| CN106086467B (en) | A kind of method and system for extracting nickel oxide using lateritic nickel ore | |
| CN100582264C (en) | Method for extracting metallic nickel cobalt from irony nickel mine | |
| CN105018721A (en) | Method for separating iron, vanadium and titanium from vanadium-titanium magnetite | |
| WO2017185946A1 (en) | Method for processing low-grade laterite nickel ore and beneficiation method therefor | |
| CN106119573B (en) | A kind of method and system for extracting nickel oxide using lateritic nickel ore | |
| CN105907984B (en) | The method for comprehensively utilizing vanadium slag | |
| CN110484720A (en) | A kind of technique that drying grate roasting-gas-based shaft kiln prereduction-electric furnace restores comprehensive utilization of V-Ti magnetite deeply | |
| CN109097562A (en) | A kind of method of lateritic nickel ore selectivity sulfidation roasting | |
| CN105734278A (en) | Treatment method of laterite-nickel ores | |
| CN101418359A (en) | Method for extracting iron and high grade ferro-nickel alloy from laterite nickle mine | |
| CN103589939A (en) | Method for smelting ferro-nickel through smelting reduction of laterite-nickel ore | |
| CN108559838A (en) | The method that lateritic nickel ore mixed smelting prepares dilval | |
| CN106086468B (en) | A kind of method and system extracting nickel oxide using ferronickel powder | |
| CN103526015A (en) | Leaching method for nickel-containing limonite | |
| CN102851490B (en) | Method for preparing high-quality calcine by fluidized reduction roasting of nickel oxide ore | |
| CN104263909A (en) | Process for recovering nickel, cobalt and iron from nickel oxide ores by virtue of roasting and water leaching | |
| CN103866115B (en) | The preparation of red soil nickel ore single stage method is containing the method for nickel and stainless steel raw material | |
| CN106086487B (en) | Method for smelting molybdenum-nickel-iron alloy by desulfurizing, dearsenizing and calcining low-grade molybdenum-nickel ore | |
| CN106834728A (en) | Process the method and system of vanadium chromium slag | |
| CN205990445U (en) | A kind of utilization lateritic nickel ore extracts the system of nickel oxide | |
| CN101082095A (en) | Method for extracting nickel iron alloy from laterite ore | |
| CN105907949A (en) | Novel process for comprehensively recovering nickel, cobalt and iron from laterite-nickel ore through low-temperature acidification and acidolysis | |
| CN206143291U (en) | System for utilize laterite -nickel ore ore deposit to draw nickel oxide | |
| CN103088210A (en) | Method for selectively leaching nickel and molybdenum from nickel-molybdenum ore |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PP01 | Preservation of patent right | ||
| PP01 | Preservation of patent right |
Effective date of registration: 20190102 Granted publication date: 20180828 |
|
| PD01 | Discharge of preservation of patent | ||
| PD01 | Discharge of preservation of patent |
Date of cancellation: 20220102 Granted publication date: 20180828 |
|
| PP01 | Preservation of patent right | ||
| PP01 | Preservation of patent right |
Effective date of registration: 20220102 Granted publication date: 20180828 |