CN105925818B - Handle the method and system of high ferro lateritic nickel ore - Google Patents
Handle the method and system of high ferro lateritic nickel ore Download PDFInfo
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- CN105925818B CN105925818B CN201610414242.4A CN201610414242A CN105925818B CN 105925818 B CN105925818 B CN 105925818B CN 201610414242 A CN201610414242 A CN 201610414242A CN 105925818 B CN105925818 B CN 105925818B
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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
- C22B23/005—Preliminary treatment of ores, e.g. by roasting or by the Krupp-Renn process
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/02—Roasting processes
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/24—Binding; Briquetting ; Granulating
- C22B1/2406—Binding; Briquetting ; Granulating pelletizing
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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
- C22B23/0415—Leaching processes with acids or salt solutions except ammonium salts solutions
- C22B23/043—Sulfurated acids or salts thereof
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- 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
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Abstract
The invention discloses the method and system of processing high ferro lateritic nickel ore, iron content is not less than 30wt% in high ferro lateritic nickel ore, and this method includes：(1) high ferro lateritic nickel ore is carried out mixing ball processed with reducing agent and additive, obtains mixing pelletizing；(2) mixing pelletizing is subjected to drying and processing, obtains drying pelletizing；(3) drying pelletizing is subjected to reduction roasting processing, obtains metallized pellet；(4) metallized pellet is subjected to Water Quenching；(5) metallized pellet after the water quenching for obtaining step (4) carries out mill ore magnetic selection processing, obtains nickeliferous iron charge and tailings；(6) nickeliferous iron charge is subjected to corrosion processing, obtains hydrated ferric oxide and rich nickel, cobalt leachate；(7) rich nickel, cobalt leachate are subjected to separating-purifying, obtain metallic nickel and metallic cobalt.This method can solve the problems, such as that traditional smelting process processing high ferro lateritic nickel ore products obtained therefrom nickel grade is low, low yield, can efficiently use high ferro lateritic nickel ore.
Description
Technical field
The invention belongs to metallurgical technology fields, specifically, the present invention relates to a kind of methods of processing high ferro lateritic nickel ore
And system.
Background technology
Nickel is a kind of important non-ferrous metal, mainly from lateritic nickel ore and nickel sulfide ore smelting.Due to nickel in recent years
Consumption be continuously increased and nickel sulfide ore reserves are constantly reduced, the exploitation of nickel laterite is paid more and more attention.Lateritic nickel ore
Two classes are essentially divided into, one kind is limonite type, is located at the top in mineral deposit, since weathering eluviation is as a result, iron is more, silicon
Few, magnesium is few, and nickel is relatively low, but amount containing cobalt is higher, and this ore preferably uses hydrometallurgical processes to handle, the clinker that smelting ferronickel generates
Production for steel；Another kind of is garnierite, be located at mineral deposit lower part, due to weathering be enriched with, the more silicon of nickel minerals, more magnesium, low iron,
Cobalt, nickel content is higher, referred to as garnirite, and this ore preferably uses fire metallurgy process to handle, and production ferronickel generates
Clinker can be used for construction material and production chemical fertilizer.Pyrometallurgy may be used in ore in intermediate layer, can also adopt
Use hydrometallurgical processes.
Complex treatment process, long flow path, technique such as are produced using wet processing for the limonite type lateritic nickel ore of high ferro
Condition is to equipment requirement height.However it uses and is had the following disadvantages in the process of traditional smelting ferronickel：Process environments are dirty
Dye is serious, and high energy consumption violates the limitation of national environmental protection policy and energy policy；It is required that ore raw materials has higher nickel grade；It returns
Rotary kiln reduction temperature is low, easy ring formation；It is low to produce finished product nickel grade；Low yield.
Therefore, the technology of processing high ferro lateritic nickel ore is further improved.
Invention content
The present invention is directed to solve at least some of the technical problems in related technologies.For this purpose, the present invention
One purpose is to propose that a kind of method and system of processing high ferro lateritic nickel ore, this method can solve at traditional smelting process
It manages that high ferro lateritic nickel ore products obtained therefrom nickel grade is low, problem of low yield, high ferro lateritic nickel ore can be efficiently used.
In one aspect of the invention, the present invention proposes a kind of method of processing high ferro lateritic nickel ore, wherein the height
Iron content is not less than 30wt% in iron lateritic nickel ore.According to an embodiment of the invention, this method includes：
(1) the high ferro lateritic nickel ore is carried out mixing ball processed with reducing agent and additive, to obtain mixing pelletizing；
(2) the mixing pelletizing is subjected to drying and processing, to obtain drying pelletizing；
(3) the drying pelletizing is subjected to reduction roasting processing, to obtain metallized pellet；
(4) metallized pellet is subjected to Water Quenching；
(5) metallized pellet after the water quenching for obtaining step (4) carries out mill ore magnetic selection processing, to obtain nickeliferous iron charge
And tailings；
(6) the nickeliferous iron charge is subjected to corrosion processing, to obtain hydrated ferric oxide and rich nickel, cobalt leachate；And
(7) the rich nickel, cobalt leachate are subjected to separating-purifying, to obtain metallic nickel and metallic cobalt.
The method of processing high ferro lateritic nickel ore according to the ... of the embodiment of the present invention passes through to containing high ferro lateritic nickel ore as a result,
Pelletizing carries out reduction roasting processing, and carries out mill ore magnetic selection processing, Ke Yiyou after obtained metallized pellet is carried out water quenching
The gangue and carbon residue contained in effect remover pellet group, to can not only significantly reduce the treating capacity in follow-up tarnishing processes,
And the acid consumption of tarnishing processes can be reduced, while corrosion processing is carried out to isolated nickeliferous iron charge so that nickeliferous iron charge
The corrosion as far as possible of middle iron is recycled for hydrated ferric oxide, and nickel, cobalt enter in leachate, at through later separation purification
Reason can be obtained high-quality nickel, cobalt product, and then can solve traditional smelting process processing high ferro lateritic nickel ore products obtained therefrom nickel
Grade is low, low yield problem, can efficiently use high ferro lateritic nickel ore.
In addition, the method for processing high ferro lateritic nickel ore according to the above embodiment of the present invention can also be with following additional
Technical characteristic：
In some embodiments of the invention, in step (1), by the high ferro lateritic nickel ore and the reducing agent and institute
It is 100 that additive, which is stated, according to mass ratio:10~30:5~20 are mixed.It was roasted thus, it is possible to significantly improve sequential reduction
The degree of metalization of gained metallized pellet in journey.
In some embodiments of the invention, in step (1), the reducing agent is reduction coal.
In some embodiments of the invention, in step (1), the additive is selected from lime stone, sodium carbonate and water
Solve at least one of carbide slag.
In some embodiments of the invention, in step (2), water content is not higher than 5wt% in the drying pelletizing.By
This, can further increase the degree of metalization of gained metallized pellet in sequential reduction roasting process.
In some embodiments of the invention, in step (3), the reduction roasting processing is in regenerative rotary hearth furnace
It carries out.Thus, it is possible to significantly reduce energy consumption and pollution.
In some embodiments of the invention, in step (3), the temperature of the reduction roasting processing is 1150~1300
Degree Celsius, the time is 20~50min.Thus, it is possible to further increase gained metallized pellet in sequential reduction roasting process
Degree of metalization.
In some embodiments of the invention, step (6) is carried out according to the following steps：The nickeliferous iron charge is added
It in closed stirred tank, and continuously blasts air or oxygen and is stirred continuously, while corrosion catalyst is added, add sulfuric acid control
Corrosion liquid pH value, reaches iron rust, Ni2+And Co2+Coexisting condition, makes in the nickeliferous iron charge most of metallic iron corrosion be
Hydrated ferric oxide obtains hydrated ferric oxide and rich nickel, cobalt leachate after being filtered, washed.Wherein, the stirring in the stirred tank
Rotating speed is 200r/min, and temperature is 60~80 DEG C, and the pH of the corrosion liquid is 1~3.8, extraction time 4~6 hours, the rust
It is 6 to lose liquid and the nickeliferous iron charge liquid-solid ratio, Ventilation Rate 6 × 103L·min-1·m-3.Thus, it is possible to significantly improve nickel, cobalt
Leaching rate.
In another aspect of the invention, the present invention proposes a kind of system of processing high ferro lateritic nickel ore.According to this hair
Bright embodiment, the system include：
Ball-making device is mixed, there is the mixing ball-making device high ferro lateritic nickel ore entrance, reducing agent entrance, additive to enter
Mouth and the outlet of mixing pelletizing；
Drying unit, the drying unit have mixing pelletizing entrance and the outlet of drying pelletizing, the mixing pelletizing entrance
It is connected with mixing pelletizing outlet；
There is drying pelletizing entrance, metallized pellet outlet and flue gas to go out for reduction roasting device, the reduction roasting device
Mouthful, the drying pelletizing entrance is connected with drying pelletizing outlet；
Granulating unit, pelletizing exports after the granulating unit has metallized pellet entrance and water quenching, the metallization ball
Group's entrance is connected with metallized pellet outlet；
Ore grinding-concentration equipment, the ore grinding-concentration equipment have pelletizing entrance, the outlet of nickeliferous iron charge and tailings after water quenching
Outlet, pelletizing entrance is connected with pelletizing outlet after the water quenching after the water quenching；
There is nickeliferous iron charge entrance, blast entrance, sulfuric acid entrance, hydrated ferric oxide to go out for corrosion device, the corrosion device
Mouth and rich nickel, the outlet of cobalt leachate, the nickeliferous iron charge entrance are connected with the nickeliferous iron charge outlet；
Separating-purifying device, the separating-purifying device have rich nickel, cobalt leachate entrance, metallic nickel outlet and metallic cobalt
Outlet, the richness nickel, cobalt leachate entrance are connected with the rich nickel, the outlet of cobalt leachate.
The system of processing high ferro lateritic nickel ore according to the ... of the embodiment of the present invention passes through to containing high ferro lateritic nickel ore as a result,
Pelletizing carries out reduction roasting processing, and carries out mill ore magnetic selection processing, Ke Yiyou after obtained metallized pellet is carried out water quenching
The gangue and carbon residue contained in effect remover pellet group, to can not only significantly reduce the treating capacity in follow-up tarnishing processes,
And the acid consumption of tarnishing processes can be reduced, while corrosion processing is carried out to isolated nickeliferous iron charge so that nickeliferous iron charge
The corrosion as far as possible of middle iron is recycled for hydrated ferric oxide, and nickel, cobalt enter in leachate, at through later separation purification
Reason can be obtained high-quality nickel, cobalt product, and then can solve traditional smelting process processing high ferro lateritic nickel ore products obtained therefrom nickel
Grade is low, low yield problem, can efficiently use high ferro lateritic nickel ore.
In some embodiments of the invention, the reduction roasting device is regenerative rotary hearth furnace.Thus, it is possible to significantly drop
Low energy consumption and pollution.
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
The above-mentioned and/or additional aspect and advantage of the present invention will become in the description from combination following accompanying drawings to embodiment
Obviously and it is readily appreciated that, wherein：
Fig. 1 is the method flow schematic diagram of processing high ferro lateritic nickel ore according to an embodiment of the invention；
Fig. 2 is the system structure diagram of processing high ferro lateritic nickel ore according to an embodiment of the invention.
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 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 of processing high ferro lateritic nickel ore, the high iron oxide red
Iron content is not less than 30wt% in native nickel minerals.According to an embodiment of the invention, this method includes：(1) by the high ferro laterite nickel
Mine carries out mixing ball processed with reducing agent and additive, to obtain mixing pelletizing；(2) the mixing pelletizing is carried out at drying
Reason, to obtain drying pelletizing；(3) the drying pelletizing is subjected to reduction roasting processing, to obtain metallized pellet；(4)
The metallized pellet is subjected to Water Quenching；(5) metallized pellet after the water quenching for obtaining step (4) carries out mill ore magnetic selection
Processing, to obtain nickeliferous iron charge and tailings；(6) the nickeliferous iron charge is subjected to corrosion processing, to obtain hydrated ferric oxide
With rich nickel, cobalt leachate；And the rich nickel, cobalt leachate are carried out separating-purifying by (7), to obtain metallic nickel and metal
Cobalt.Inventor has found, by carrying out reduction roasting processing to the pelletizing containing high ferro lateritic nickel ore, and by obtained metallization
Pelletizing carries out mill ore magnetic selection processing after carrying out water quenching, can effectively remove the gangue and carbon residue contained in material pelletizing, to not
The treating capacity in follow-up tarnishing processes can be only significantly reduced, and the acid consumption of tarnishing processes can be reduced, while to detaching
The nickeliferous iron charge arrived carries out corrosion processing so that and iron corrosion as far as possible is recycled for hydrated ferric oxide in nickeliferous iron charge, and
Nickel, cobalt enter in leachate, to can be obtained high-quality nickel, cobalt product through later separation purification processes, and then can solve
Traditional smelting process processing high ferro lateritic nickel ore products obtained therefrom nickel grade is low, low yield problem, can efficiently use high ferro laterite
Nickel minerals.
The method of the processing high ferro lateritic nickel ore of the embodiment of the present invention is described in detail below with reference to Fig. 1.According to this
The embodiment of invention, this method include：
S100：High ferro lateritic nickel ore is carried out mixing ball processed with reducing agent and additive
According to an embodiment of the invention, high ferro lateritic nickel ore is carried out mixing ball processed with reducing agent and additive, so as to
To obtain mixing pelletizing.Specifically, iron content is not less than 30wt% in high ferro lateritic nickel ore.
According to one embodiment of present invention, the mixed proportion of high ferro lateritic nickel ore and 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, high ferro laterite
Nickel minerals can be 100 according to mass ratio with reducing agent and additive:10~30:5~20 are mixed.Inventor passes through a large amount of real
It tests and has been surprisingly found that, if the additive amount of reducing agent is too low, the reduction effect of metallized pellet can be influenced, and if the additive amount of reducing agent
It is excessively high, the technical indicator of product can not be improved, and the reduction coal wasting of resources can be caused, raising production cost, and additive
Dosage is intended to the reduction of nickel in auxiliary lateritic nickel ore, and too high or too low dosage is found in experiment all can reduce the reduction effect of nickel
Fruit.
According to still a further embodiment, the concrete type of reducing agent 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, reducing agent can be reduction coal, such as can be with
For anthracite, lignite, bituminous coal etc..
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, according to a particular embodiment of the invention, additive be selected from lime stone, sodium carbonate and
Hydrolyze at least one of carbide slag.Inventor has found that in the reduction process of lateritic nickel ore, such additive can be from magnesium olive
NiO is displaced in stone or fayalite, to improve the activity of NiO, to significantly reduce reducing and smelting temperature so that lateritic nickel ore
Reducing condition be greatly improved, promote reduction reaction carry out.
S200：Mixing pelletizing is subjected to drying and processing
According to an embodiment of the invention, mixing pelletizing obtained above is subjected to drying and processing, so as to be dried
Pelletizing.Thus, it is possible to significantly improve the degree of metalization of metallized pellet obtained by sequential reduction calcination process.
According to an embodiment of the present invention, it dries water content in pelletizing and is not higher than 5wt%.It should be noted that this field
Technical staff can according to actual needs select the condition of drying and processing, contain as long as can meet in gained drying pelletizing
Water is not higher than 5wt%.
S300：Drying pelletizing is subjected to reduction roasting processing
According to an embodiment of the invention, drying pelletizing obtained above is subjected to reduction roasting processing, so as to obtain
Metallized pellet and flue gas, the flue gas can return to baking step and be used as dried medium.
According to one embodiment of present invention, reduction roasting processing can carry out in regenerative rotary hearth furnace.Thus, it is possible to
Significantly reduce energy consumption and pollution.
According to still a further embodiment, the condition of reduction roasting processing is not particularly restricted, art technology
Personnel can select according to actual needs, and according to a particular embodiment of the invention, reduction roasting processing can be in temperature
20~50min is carried out under 1150~1300 degrees Celsius.
S400：Metallized pellet is subjected to Water Quenching
According to an embodiment of the invention, metallized pellet obtained above is subjected to Water Quenching.Thus, it is possible to significantly carry
High efficiency.
S500：Metallized pellet after the water quenching that step S400 is obtained carries out mill ore magnetic selection processing
According to an embodiment of the invention, the metallized pellet after water quenching step S400 obtained carries out at mill ore magnetic selection
Reason, so as to obtain nickeliferous iron charge and tailings.Inventor has found, by being restored to the pelletizing containing high ferro lateritic nickel ore
Calcination process, and mill ore magnetic selection processing is carried out after obtained metallized pellet is carried out water quenching, material ball can be effectively removed
The gangue and carbon residue contained in group to can not only significantly reduce the treating capacity in follow-up tarnishing processes, but also can reduce
The acid consumption of tarnishing processes, and then reduce processing cost.It should be noted that those skilled in the art can be right according to actual needs
Ore grinding and the condition of magnetic separation are selected.
S600：Nickeliferous iron charge is subjected to corrosion processing
According to an embodiment of the invention, above-mentioned isolated nickeliferous iron charge is subjected to corrosion processing, so as to obtain
Hydrated ferric oxide and rich nickel, cobalt leachate.In the step, specifically, nickeliferous iron charge is added in closed stirred tank, and even
It is continuous to blast air or oxygen and be stirred continuously, while corrosion catalyst is added, add sulfuric acid to control corrosion liquid pH value, reach iron rust,
Ni2+And Co2+Coexisting condition, it is hydrated ferric oxide to make most of metallic iron corrosion in nickeliferous iron charge, after being filtered, washed
Obtain hydrated ferric oxide and rich nickel, cobalt leachate, wherein the speed of agitator in stirred tank is 200r/min, and temperature is 60~80
DEG C, the pH of corrosion liquid is 1~3.8, extraction time 4~6 hours, and corrosion liquid and nickeliferous iron charge liquid-solid ratio are 6, Ventilation Rate 6 ×
103L·min-1·m-3.Iron is set to be oxidized to FeOOH after being passed through air in OK range by the pH value of control corrosion liquid as a result,
And precipitate into slag with precipitation form, and nickel, cobalt are with Ni2+And Co2+Form stable be present in leachate, through being filtered, washed
After hydrated ferric oxide and rich nickel, cobalt leachate can be obtained, iron oxide red can be obtained after the hydrated ferric oxide removing crystallization water in addition, increase
Added value of product, gained richness nickel, cobalt leachate is added to can be obtained high-quality nickel, cobalt product through later separation purification processes, to
It can solve the problems, such as that traditional smelting process processing high ferro lateritic nickel ore products obtained therefrom nickel grade is low, low yield, can efficiently use
High ferro lateritic nickel ore.
S700：Rich nickel, cobalt leachate are subjected to separating-purifying
According to an embodiment of the invention, rich nickel obtained above, cobalt leachate are subjected to separating-purifying, so as to detach
Obtain metallic nickel and metallic cobalt.It should be noted that those skilled in the art can be according to actual needs to the separating-purifying
Concrete operations are selected, as long as metallic nickel and metallic cobalt can be obtained separating-purifying from rich nickel, cobalt leachate.
The method of processing high ferro lateritic nickel ore according to the ... of the embodiment of the present invention passes through to the pelletizing containing high ferro lateritic nickel ore
Reduction roasting processing is carried out, and mill ore magnetic selection processing is carried out after obtained metallized pellet is carried out water quenching, can effectively be gone
Except the gangue and carbon residue contained in material pelletizing, to can not only significantly reduce the treating capacity in follow-up tarnishing processes, but also
The acid consumption of tarnishing processes can be reduced, while corrosion processing is carried out to isolated nickeliferous iron charge so that iron in nickeliferous iron charge
Corrosion is recycled for hydrated ferric oxide as far as possible, and nickel, cobalt enter in leachate, to be through later separation purification processes
High-quality nickel, cobalt product can be obtained, and then traditional smelting process processing high ferro lateritic nickel ore products obtained therefrom nickel grade can be solved
Low, low yield problem, can efficiently use high ferro lateritic nickel ore.
In the second aspect of the invention, the present invention proposes a kind of system of processing high ferro lateritic nickel ore.According to this hair
Bright embodiment, the method which is used to implement above-mentioned processing high ferro lateritic nickel ore.According to an embodiment of the invention, it refers to
Fig. 2, the system include：Mix ball-making device 100, drying unit 200, reduction roasting device 300, granulating unit 400, ore grinding-
Concentration equipment 500, corrosion device 600 and separating-purifying device 700.
According to an embodiment of the invention, mixing ball-making device 100 has high ferro lateritic nickel ore entrance 101, reducing agent entrance
102, additive entrance 103 and mixing pelletizing outlet 104, and suitable for mixing high ferro lateritic nickel ore with reducing agent and additive
Conjunction ball, so as to obtain mixing pelletizing.Specifically, iron content is not less than 30wt% in high ferro lateritic nickel ore.
According to one embodiment of present invention, the mixed proportion of high ferro lateritic nickel ore and 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, high ferro laterite
Nickel minerals can be 100 according to mass ratio with reducing agent and additive:10~30:5~20 are mixed.Inventor passes through a large amount of real
It tests and has been surprisingly found that, if the additive amount of reducing agent is too low, the reduction effect of metallized pellet can be influenced, and if the additive amount of reducing agent
It is excessively high, the technical indicator of product can not be improved, and the reduction coal wasting of resources can be caused, raising production cost, and additive
Dosage is intended to the reduction of nickel in auxiliary lateritic nickel ore, and too high or too low dosage is found in experiment all can reduce the reduction effect of nickel
Fruit.
According to still a further embodiment, the concrete type of reducing agent 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, reducing agent can be reduction coal, such as can be with
For anthracite, lignite, bituminous coal etc..
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, according to a particular embodiment of the invention, additive be selected from lime stone, sodium carbonate and
Hydrolyze at least one of carbide slag.Inventor has found that in the reduction process of lateritic nickel ore, such additive can be from magnesium olive
NiO is displaced in stone or fayalite, to improve the activity of NiO, to significantly reduce reducing and smelting temperature so that lateritic nickel ore
Reducing condition be greatly improved, promote reduction reaction carry out.
According to an embodiment of the invention, drying unit 200 has mixing pelletizing entrance 201 and drying pelletizing outlet 202, mixes
It closes pelletizing entrance 201 with mixing pelletizing outlet 104 to be connected, and suitable for mixing pelletizing obtained above is carried out drying and processing, from
And drying pelletizing can be obtained.Thus, it is possible to significantly improve the degree of metalization of metallized pellet obtained by sequential reduction calcination process.
According to an embodiment of the present invention, it dries water content in pelletizing and is not higher than 5wt%.It should be noted that this field
Technical staff can according to actual needs select the condition of drying and processing, contain as long as can meet in gained drying pelletizing
Water is not higher than 5wt%.
According to an embodiment of the invention, reduction roasting device 300 has drying pelletizing entrance 301, metallized pellet outlet
302 and exhanst gas outlet 303, drying pelletizing entrance 301 is connected with drying pelletizing outlet 202, and is suitable for drying obtained above
Pelletizing carries out reduction roasting processing, and so as to obtain metallized pellet and flue gas, which can return to drying course conduct
Dried medium uses.
According to one embodiment of present invention, reduction roasting device can be regenerative rotary hearth furnace.Thus, it is possible to significantly drop
Low energy consumption and pollution.
According to still a further embodiment, the condition of reduction roasting processing is not particularly restricted, art technology
Personnel can select according to actual needs, and according to a particular embodiment of the invention, reduction roasting processing can be in temperature
20~50min is carried out under 1150~1300 degrees Celsius.
According to an embodiment of the invention, pelletizing exports after granulating unit 400 has metallized pellet entrance 401 and water quenching
402, metallized pellet entrance 401 is connected with metallized pellet outlet 302, and suitable for carrying out metallized pellet obtained above
Water Quenching.Thus, it is possible to significantly improve efficiency.
According to an embodiment of the invention, ore grinding-concentration equipment 500 has pelletizing entrance 501, the outlet of nickeliferous iron charge after water quenching
502 and tailings outlet 503, pelletizing entrance 501 402 is connected with pelletizing outlet after water quenching after water quenching, and being suitable for will be obtained above
Metallized pellet after water quenching carries out mill ore magnetic selection processing, so as to obtain nickeliferous iron charge and tailings.Inventor has found, passes through
Reduction roasting processing is carried out to the pelletizing containing high ferro lateritic nickel ore, and is carried out after obtained metallized pellet is carried out water quenching
Mill ore magnetic selection processing, can effectively remove the gangue and carbon residue contained in material pelletizing, follow-up to can not only significantly reduce
Treating capacity in tarnishing processes, and the acid consumption of tarnishing processes can be reduced, and then reduce processing cost.It should be noted that
Those skilled in the art can according to actual needs select ore grinding and the condition of magnetic separation.
According to an embodiment of the invention, there is corrosion device 600 nickeliferous iron charge entrance 601, blast entrance 602, sulfuric acid to enter
Mouth 603, hydrated ferric oxide outlet 604 and rich nickel, cobalt leachate outlet 605, nickeliferous iron charge entrance 601 and the outlet of nickeliferous iron charge
502 are connected, and suitable for above-mentioned isolated nickeliferous iron charge is carried out corrosion processing, so as to obtain hydrated ferric oxide and richness
Nickel, cobalt leachate.In the step, specifically, nickeliferous iron charge is added in closed stirred tank, and air or oxygen are continuously blasted
Gas is simultaneously stirred continuously, while corrosion catalyst is added, and is added sulfuric acid to control corrosion liquid pH value, is reached iron rust, Ni2+And Co2+It can coexist
Condition, it is hydrated ferric oxide to make in nickeliferous iron charge most of metallic iron corrosion, obtained after being filtered, washed hydrated ferric oxide and
Rich nickel, cobalt leachate, wherein the speed of agitator in stirred tank is 200r/min, and temperature is 60~80 DEG C, and the pH of corrosion liquid is 1
~3.8, extraction time 4~6 hours, corrosion liquid and nickeliferous iron charge liquid-solid ratio are 6, Ventilation Rate 6 × 103L·min-1·m-3.By
This, the pH value by controlling corrosion liquid makes iron be oxidized to FeOOH and be precipitate into precipitation form in OK range after being passed through air
In slag, and nickel, cobalt are with Ni2+And Co2+Form stable be present in leachate, hydrated ferric oxide can be obtained after being filtered, washed
With rich nickel, cobalt leachate, iron oxide red can be obtained after the hydrated ferric oxide removing crystallization water in addition, increase added value of product, gained
High-quality nickel cobalt product can be obtained in rich nickel, cobalt leachate after later separation purification processes, so as to solve traditional smelter
Skill handles that high ferro lateritic nickel ore products obtained therefrom nickel grade is low, problem of low yield, can efficiently use high ferro lateritic nickel ore.
According to an embodiment of the invention, separating-purifying device 700 has rich nickel, cobalt leachate entrance 701, metallic nickel outlet
702 and metallic cobalt outlet 703, rich nickel, cobalt leachate entrance 701 and rich nickel, cobalt leachate outlet 605 are connected, and being suitable for will be upper
Rich nickel, the cobalt leachate stated carry out separating-purifying, so as to isolated metallic nickel and metallic cobalt.It needs to illustrate
Be that those skilled in the art can according to actual needs select the concrete operations of the separating-purifying, if can from rich nickel,
Separating-purifying obtains metallic nickel and metallic cobalt in cobalt leachate.
The system of processing high ferro lateritic nickel ore according to the ... of the embodiment of the present invention passes through to the pelletizing containing high ferro lateritic nickel ore
Reduction roasting processing is carried out, and mill ore magnetic selection processing is carried out after obtained metallized pellet is carried out water quenching, can effectively be gone
Except the gangue and carbon residue contained in material pelletizing, to can not only significantly reduce the treating capacity in follow-up tarnishing processes, but also
The acid consumption of tarnishing processes can be reduced, while corrosion processing is carried out to isolated nickeliferous iron charge so that iron in nickeliferous iron charge
Corrosion is recycled for hydrated ferric oxide as far as possible, and nickel, cobalt enter in leachate, to handle and can obtain through later separation
To high-quality nickel, cobalt product, and then it can solve that traditional smelting process processing high ferro lateritic nickel ore products obtained therefrom nickel grade is low, production
The low problem of rate, can efficiently use high ferro lateritic nickel ore.
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 high ferro lateritic nickel ore (nickeliferous 1.2wt%, cobalt 0.09wt%, iron 41.2wt%) according to high ferro lateritic nickel ore 100
Parts by weight, 10 parts by weight of coal, pressure ball after the weight ratio mixing of 10 parts by weight of lime stone, pelletizing are distributed into rotary hearth furnace and exist after drying
Reductase 12 0min under 1200 DEG C of environment, rotary hearth furnace discharge high-temperature flue gas return stokehold system be used as lateritic nickel ore raw material stoving and
Pelletizing is dried, and is carried out mill ore magnetic selection after the metallized pellet product water quenching that discharge gate is discharged, is obtained nickeliferous iron charge, contain above-mentioned
Ferronickel material is uniformly sent into the slot of closed band stirring, and continuous blast is filled air or oxygen and is stirred continuously, while sodium salt is added
Substance removes iron rate as corrosion catalyst accelerating selection, and metallic iron in mine " corrosion " is made to be hydrated ferric oxide and recycle oxygen
Change iron oxide red, obtain rich nickel, cobalt leachate, control stirring intensity 200r/min, temperature is 60 DEG C, pH value 1.2,4 hours time, liquid
Admittedly than 6,6 × 103Lmin of Ventilation Rate-1·m-3, by iron rust isolated nickeliferous, cobalt leachate, wherein nickel after the completion of corrosion
Leaching rate be 92%, the leaching rate of cobalt is 85%, and finally carrying out separation by traditional handicraft to the pregnant solution rich in nickel, cobalt carries
It is pure, finally obtain metallic nickel, cobalt product.
Embodiment 2
By high ferro lateritic nickel ore (nickeliferous 1.1wt%, cobalt 0.1wt%, iron 32.2wt%) according to 100 weight of high ferro lateritic nickel ore
Measure part, 15 parts by weight of coal, pressure ball after the weight ratio mixing of 20 parts by weight of carbide slag, pelletizing is distributed into rotary hearth furnace and exists after drying
Restore 50min under 1300 DEG C of environment, the high-temperature flue gas of rotary hearth furnace discharge return stokehold system be used as lateritic nickel ore raw material stoving and
Pelletizing is dried, and is carried out mill ore magnetic selection after the metallized pellet product water quenching that discharge gate is discharged, is obtained nickeliferous iron charge, contain above-mentioned
Ferronickel material is uniformly sent into the slot of closed band stirring, and continuous blast is filled air or oxygen and is stirred continuously, while sylvite is added
Substance removes iron rate as corrosion catalyst accelerating selection, and metallic iron in mine " corrosion " is made to be hydrated ferric oxide and recycle oxygen
Change iron oxide red, obtain rich nickel, cobalt leachate, control stirring intensity 200r/min, temperature is 80 DEG C, pH value 2.6,6 hours time, liquid
Admittedly than 6,6 × 103Lmin of Ventilation Rate-1·m-3, by iron rust isolated nickeliferous, cobalt leachate, wherein nickel after the completion of corrosion
Leaching rate be 94%, the leaching rate of cobalt is 88%, and finally carrying out separation by traditional handicraft to the pregnant solution rich in nickel, cobalt carries
It is pure, finally obtain metallic nickel, cobalt product.
Embodiment 3
By high ferro lateritic nickel ore (nickeliferous 0.98wt%, cobalt 0.11wt%, iron 34.5wt%) according to high ferro lateritic nickel ore 100
Parts by weight, 25 parts by weight of coal, lime, sodium carbonate mix pressure ball after the weight ratio mixings of 25 parts by weight, pelletizing cloth after drying
Enter rotary hearth furnace and restore 30min under 1250 DEG C of environment, the high-temperature flue gas of rotary hearth furnace discharge returns to stokehold system and is used as lateritic nickel ore
Raw material stoving and pelletizing drying, mill ore magnetic selection is carried out after the metallized pellet product water quenching that discharge gate is discharged, and obtains containing ferronickel
Above-mentioned nickeliferous ferromagnetism material is uniformly sent into the slot of closed band stirring by material, and continuous blast is filled air or oxygen and constantly stirred
It mixes, while sodium salt substance is added and removes iron rate as corrosion catalyst accelerating selection, it is water to make metallic iron in mine " corrosion "
It closes iron oxide and recycles iron oxide red, obtain rich nickel, cobalt leachate, control stirring intensity 200r/min, temperature is 70 DEG C, ph values
3.5,5 hours time, liquid-solid ratio 6,6 × 103Lmin of Ventilation Rate-1·m-3, contain iron rust is isolated after the completion of corrosion
Nickel, cobalt leachate, the wherein leaching rate of nickel are 93%, and the leaching rate of cobalt is 87%, is finally passed through to the pregnant solution rich in nickel, cobalt
Traditional handicraft carries out separating-purifying, finally obtains metallic nickel, cobalt product.
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 (10)
1. a kind of method of processing high ferro lateritic nickel ore, iron content is not less than 30wt%, feature in the high ferro lateritic nickel ore
It is, the method includes：
(1) the high ferro lateritic nickel ore is carried out mixing ball processed with reducing agent and additive, to obtain mixing pelletizing；
(2) the mixing pelletizing is subjected to drying and processing, to obtain drying pelletizing；
(3) the drying pelletizing is subjected to reduction roasting processing, to obtain metallized pellet；
(4) metallized pellet is subjected to Water Quenching；
(5) metallized pellet after the water quenching for obtaining step (4) carries out mill ore magnetic selection processing, to obtain nickeliferous iron charge and tail
Slag；
(6) the nickeliferous iron charge is subjected to corrosion processing, to obtain hydrated ferric oxide and rich nickel, cobalt leachate；And
(7) the rich nickel, cobalt leachate are subjected to separating-purifying, to obtain metallic nickel and metallic cobalt,
Wherein, step (6) is carried out according to the following steps：The nickeliferous iron charge is added in closed stirred tank, and even
It is continuous to blast air or oxygen and be stirred continuously, while corrosion catalyst is added, add sulfuric acid to control corrosion liquid pH value, reach iron rust,
Ni2+And Co2+Coexisting condition, it is hydrated ferric oxide to make most of metallic iron corrosion in the nickeliferous iron charge, through filtering, washing
Hydrated ferric oxide and rich nickel, cobalt leachate are obtained after washing, wherein the corrosion liquid and the nickeliferous iron charge liquid-solid ratio are 6.
2. according to the method described in claim 1, it is characterized in that, in step (1), by the high ferro lateritic nickel ore with it is described
Reducing agent and the additive are 100 according to mass ratio:10~30:5~20 are mixed.
3. according to the method described in claim 1, it is characterized in that, in step (1), the reducing agent is reduction coal.
4. according to the method described in claim 3, it is characterized in that, in step (1), the additive be selected from lime stone,
At least one of sodium carbonate and hydrolysis carbide slag.
5. according to the described method of any one of claim 1-4, which is characterized in that in step (2), in the drying pelletizing
Water content is not higher than 5wt%.
6. according to the method described in claim 5, it is characterized in that, in step (3), the reduction roasting processing is in accumulation of heat
It is carried out in formula rotary hearth furnace.
7. according to the method described in claim 6, it is characterized in that, in step (3), the temperature of the reduction roasting processing is
1150~1300 degrees Celsius, the time is 20~50min.
8. according to the method described in claim 1, it is characterized in that, the speed of agitator in stirred tank described in step (6) is
200r/min, temperature are 60~80 DEG C, and the pH of the corrosion liquid is 1~3.8, extraction time 4~6 hours, Ventilation Rate 6 ×
103L·min-1·m-3。
9. a kind of system of processing high ferro lateritic nickel ore that implementing claim 1-8 any one of them methods, which is characterized in that
Including：
Mix ball-making device, the mixing ball-making device with high ferro lateritic nickel ore entrance, reducing agent entrance, additive entrance and
Mix pelletizing outlet；
Drying unit, the drying unit have mixing pelletizing entrance and the outlet of drying pelletizing, the mixing pelletizing entrance and institute
The outlet of mixing pelletizing is stated to be connected；
Reduction roasting device, the reduction roasting device have drying pelletizing entrance, metallized pellet outlet and exhanst gas outlet, institute
Drying pelletizing entrance is stated with drying pelletizing outlet to be connected；
Granulating unit, pelletizing exports after the granulating unit has metallized pellet entrance and water quenching, and the metallized pellet enters
Mouth is connected with metallized pellet outlet；
Ore grinding-concentration equipment, the ore grinding-concentration equipment have pelletizing entrance, the outlet of nickeliferous iron charge and tailings outlet after water quenching,
Pelletizing entrance is connected with pelletizing outlet after the water quenching after the water quenching；
Corrosion device, the corrosion device have nickeliferous iron charge entrance, blast entrance, sulfuric acid entrance, hydrated ferric oxide outlet and
Rich nickel, the outlet of cobalt leachate, the nickeliferous iron charge entrance are connected with the nickeliferous iron charge outlet；
There is rich nickel, cobalt leachate entrance, metallic nickel outlet and metallic cobalt to go out for separating-purifying device, the separating-purifying device
Mouthful, the richness nickel, cobalt leachate entrance are connected with the rich nickel, the outlet of cobalt leachate.
10. system according to claim 9, which is characterized in that the reduction roasting device is regenerative rotary hearth furnace.
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| CN106755954A (en) * | 2016-11-17 | 2017-05-31 | 江苏省冶金设计院有限公司 | The processing method of lateritic nickel ore |
| CN106755953A (en) * | 2016-11-17 | 2017-05-31 | 江苏省冶金设计院有限公司 | The processing method of lateritic nickel ore |
| CN111172384B (en) * | 2020-01-17 | 2022-08-09 | 矿冶科技集团有限公司 | Method for reducing, enriching and recycling nickel and cobalt from nickel and cobalt multi-metal oxide ore |
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| US4135913A (en) * | 1972-10-27 | 1979-01-23 | The International Nickel Company, Inc. | Thermal concentration of non-ferrous metal values in sulfide minerals |
| CN101073790B (en) * | 2006-12-22 | 2010-05-19 | 昆明贵金属研究所 | Reduction-mill concentration treatment for different-type red-clay nickel mine |
| CN100497670C (en) * | 2006-12-22 | 2009-06-10 | 昆明贵金属研究所 | Process of fast reducing carbon-containing red mud nickel ore pellet to enriching 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 |
| CN102168157B (en) * | 2009-12-21 | 2014-07-16 | 李维成 | Method for reducing nickel ore by using reducing rotary kiln and producing ferronickel by rusting electric furnace |
| CN102373329B (en) * | 2010-08-18 | 2013-11-06 | 沈阳有色金属研究院 | Method for gathering nickel and iron from laterite-nickel ores |
| CN102021351A (en) * | 2010-10-11 | 2011-04-20 | 云南锡业集团（控股）有限责任公司 | Integrated approach to enriching nickel from nickel oxide laterite ore |
| CN102212636A (en) * | 2011-05-26 | 2011-10-12 | 吴道洪 | Iron-making method by performing coal-based direct reduction in rotary hearth furnace and melting in gas melting furnace on lateritic-nickel ore |
| CN102643997B (en) * | 2012-04-09 | 2015-07-01 | 北京神雾环境能源科技集团股份有限公司 | Laterite-nickel ore processing method for efficiently recovering nickel resources |
| 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 |
| CN103667742B (en) * | 2013-09-16 | 2016-03-02 | 江苏省冶金设计院有限公司 | Treatment method of laterite-nickel ore |
| CN103667743B (en) * | 2013-09-16 | 2016-08-17 | 江苏省冶金设计院有限公司 | Treatment method of laterite-nickel ore |
| CN205710870U (en) * | 2016-06-13 | 2016-11-23 | 江苏省冶金设计院有限公司 | Process the system of high ferro lateritic nickel ore |
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