CN105907967A - System and method for extracting ferronickel alloy from limonite type lateritic nickel ore - Google Patents
System and method for extracting ferronickel alloy from limonite type lateritic nickel ore Download PDFInfo
- Publication number
- CN105907967A CN105907967A CN201610418493.XA CN201610418493A CN105907967A CN 105907967 A CN105907967 A CN 105907967A CN 201610418493 A CN201610418493 A CN 201610418493A CN 105907967 A CN105907967 A CN 105907967A
- Authority
- CN
- China
- Prior art keywords
- outlet
- nickel
- entrance
- dilval
- combustion gas
- 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.)
- Pending
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
- C22B4/00—Electrothermal treatment of ores or metallurgical products for obtaining metals or alloys
- C22B4/08—Apparatus
-
- 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
- C22B4/00—Electrothermal treatment of ores or metallurgical products for obtaining metals or alloys
- C22B4/06—Alloys
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a system and a method for extracting a ferronickel alloy from limonite type lateritic nickel ore. The system comprises a mixing device, a pelleting device, a reduction roasting device, a rapid melting device and a gas melting separation furnace, wherein the mixing device comprises a lateritic nickel ore inlet, a reducing coal inlet, an additive inlet and a mixed material outlet; the pelleting device comprises a mixed material inlet and a mixed pellet outlet, and the mixed material inlet is connected with the mixed material outlet; the reduction roasting device comprises a mixed pellet inlet and a metallized pellet outlet, and the mixed pellet inlet is connected with the mixed pellet outlet; the rapid melting device comprises a metallized pellet inlet and a mixed melt outlet, and the metallized pellet inlet is connected with the metallized pellet outlet; the gas melting separation furnace comprises a burner, a mixed melt inlet, a ferronickel alloy outlet and a slag outlet, and the mixed melt inlet is connected with the mixed melt outlet. The high-nickel-grade ferronickel alloy is prepared from the low-nickel-grade limonite type lateritic nickel ore by the aid of the system, so that the production cost of the ferronickel alloy is reduced while the source of ferronickel alloy raw materials is expanded.
Description
Technical field
The invention belongs to metallurgical technology field, specifically, the present invention relates to a kind of extraction nickel from limonite type lateritic nickel ore
The system and method for ferroalloy.
Background technology
Lateritic nickel ore stone nickeliferous olivine rock forms through large-scale long-term weathering leaching is rotten in the torrid zone or subtropical zone,
The loose clay shape Ore being made up of hydrous oxides such as ferrum, magnesium, silicon, the ferrum in Ore is mainly with the form of bloodstone
Existing, Ore takes on a red color, so being referred to as lateritic nickel ore.The adopted part of lateritic nickel ore is generally divided into 3 layers: limonite,
Transition zone and humus layer, their composition is different, and rule is that iron content reduces successively, and content of magnesium and nickel content rise successively
Height, limonite layer is generally the low magnesium laterite nickel mine of high ferro, its iron content 40～50%, nickel content 0.8～1.5%.
The processing method of lateritic nickel ore mainly has two kinds: pyrogenic process and wet method.Wet processing is used typically to process low magnesium high ferro laterite
Nickel minerals, can extract Ni, Co in lateritic nickel ore, obtain electrolytic nickel, and its cost is lower than pyrogenic process, but wet treatment
Technics comparing is complicated, long flow path, and environmental pollution is serious, and when producing, raw material loss is big, and process conditions are high to equipment requirements,
Keep the safety in production wayward；Using thermal process typically to process high magnesium low ferrum lateritic nickel ore, major product is dilval, energy
Enough directly applying to rustless steel produce, thermal process processes laterite nickel ore and producing ferronickel alloy, and to have that flow process is short, efficiency is high etc. excellent
Point, current thermal process mainly processes high-grade lateritic nickel ore.Due to the restriction of resource, limonite type lateritic nickel ore is nickeliferous
Grade is low, and the nickeliferous grade of ferronickel produced by pyrometallurgical smelting is low, and economic worth is the highest, brown in the urgent need to being developed to utilize
Iron mine type lateritic nickel ore produces the ferronickel of meeting the market requirement.
Summary of the invention
It is contemplated that one of technical problem solved the most to a certain extent in correlation technique.To this end, the one of the present invention
Purpose is to propose a kind of system and method extracting dilval from limonite type lateritic nickel ore, and this system uses nickeliferous product
The low limonite type lateritic nickel ore in position prepares the dilval that nickel is of high grade, such that it is able at the raw material expanding dilval
The production cost of dilval is reduced while source.
In one aspect of the invention, the present invention proposes a kind of system extracting dilval from limonite type lateritic nickel ore.
According to embodiments of the invention, this system includes:
Mixing arrangement, described mixing arrangement has lateritic nickel ore entrance, reduction coal entrance, additive entrance and mixed material and goes out
Mouthful；
Ball-making device, described ball-making device has mixed material entrance and mixing pelletizing outlet, described mixed material entrance and institute
State mixed material outlet to be connected；
Reduction roasting device, described reduction roasting device has mixing pelletizing entrance and metallized pellet outlet, described mixing ball
Group's entrance is connected with the outlet of described mixing pelletizing；
Rapid melting device, described rapid melting device has metallized pellet entrance and blend melt outlet, described metallization
Pelletizing entrance is connected with the outlet of described metallized pellet；
Molten point of stove of combustion gas, the molten point stove of described combustion gas has the outlet of burner, blend melt entrance, dilval and slag outlet,
Described blend melt entrance is connected with the outlet of described blend melt.
Thus, the system extracting dilval from limonite type lateritic nickel ore according to embodiments of the present invention is led to reduction roasting
Device and rapid melting device and the molten point stove of combustion gas are used in series so that mixed containing the low limonite type lateritic nickel ore of nickel grade
Closing pelletizing and carry out reduction treatment in reduction roasting device, obtained metallized pellet supply is carried out to rapid melting device
The fusing that is rapidly heated is smelted, and nickel-containing molten iron obtained after fusing and the blend melt of slag further play heat and be fed into molten point of combustion gas
In stove, utilize combustion gas to melt the burner arranged on point stove and control to enter combustion gas to melt the air of point stove and gas proportion molten to control combustion gas
Atmosphere in point stove so that carry out slag in molten iron after a part of ferrum selective oxidation, and ensure nickel not oxidized (due to
The existence of NiO+Fe=Ni+FeO reaction, even if nickel is oxidized, also can be replaced by iron), such that it is able to it is higher to obtain nickel grade
Dilval, and then the production cost of dilval can be reduced while expanding the raw material sources of dilval.
It addition, the system extracting dilval from limonite type lateritic nickel ore according to the above embodiment of the present invention can also have
There is a following additional technical characteristic:
In some embodiments of the invention, described reduction roasting device is rotary kiln, rotary hearth furnace, car-bottom furnace or tunnel cave.
Thus, it is possible to significantly improve the degree of metalization of metallized pellet.
In some embodiments of the invention, described rapid melting device is electric arc furnace or mineral hot furnace.Thus, it is possible to significantly carry
The melting efficiency of high metallized pellet.
In the second aspect of the invention, the present invention proposes a kind of side extracting dilval from limonite type lateritic nickel ore
Method.According to embodiments of the invention, the method be use above-mentioned from limonite type lateritic nickel ore, extract dilval be
System is carried out.According to a particular embodiment of the invention, the method includes:
(1) supply of described lateritic nickel ore, reduction coal and additive is carried out mixed processing to described mixing arrangement, in order to
To mixed material；
(2) supply of described mixed material is carried out ball processed to described ball-making device, in order to obtain mixing pelletizing；
(3) supply of described mixing pelletizing is carried out reduction roasting process to described reduction roasting device, in order to metallized
Pelletizing；
(4) supply of described metallized pellet is carried out melt processed to described rapid melting device, in order to obtain containing containing ferronickel
Water and the blend melt of slag；And
(5) by the most described to the gaseous mixture containing air and combustion gas and the described blend melt supply containing nickel-containing molten iron and slag
Molten point of stove of combustion gas carries out molten divisional processing, in order to obtain dilval and slag,
Wherein, in step (1), the nickel content in described lateritic nickel ore is 0.5～1.4wt%, and iron content is 40～50wt%.
Thus, the method extracting dilval from limonite type lateritic nickel ore according to embodiments of the present invention is led to and is just contained nickel
The mixing pelletizing of the limonite type lateritic nickel ore that grade is low carries out reduction treatment, obtained metallization in reduction roasting device
Pelletizing supply carries out, to rapid melting device, the mixed of fusing smelting, nickel-containing molten iron obtained after fusing and slag that be rapidly heated
Conjunction melt further plays heat and is fed in molten point of stove of combustion gas, utilizes combustion gas to melt the burner arranged on point stove and controls molten point of stove of entrance combustion gas
Air and gas proportion control combustion gas and melt the atmosphere in point stove so that molten iron carries out stove after a part of ferrum selective oxidation
Slag, and ensure nickel not oxidized (due to the existence of NiO+Fe=Ni+FeO reaction, even if nickel is oxidized, also can be replaced by iron),
Such that it is able to obtain the dilval that nickel grade is higher, and then nickel can be reduced while expanding the raw material sources of dilval
The production cost of ferroalloy.
It addition, the method extracting dilval from limonite type lateritic nickel ore according to the above embodiment of the present invention can also have
There is a following additional technical characteristic:
In some embodiments of the invention, in step (1), described lateritic nickel ore, described reduction coal and described interpolation
Agent is that 100:5～25:3～15 mixes according to mass ratio.Thus, it is possible to significantly improve the reduction efficiency of ferronickel.
In some embodiments of the invention, in step (1), described reduction coal be selected from anthracite, bituminous coal, semi-coke and
At least one in semicoke.
In some embodiments of the invention, in step (1), described additive is selected from alkali metal oxide, alkali metal
At least one in salt, alkaline earth oxide and alkali salt.
In some embodiments of the invention, in step (3), the degree of metalization of described metallized pellet is 40～60%.
In some embodiments of the invention, in step (4), the temperature of described melt processed is 1500～1650 degrees Celsius.
In some embodiments of the invention, in the described blend melt containing nickel-containing molten iron and slag, in described nickel-containing molten iron
The content of nickel is 1～4wt%.Thus, it is possible to the nickel grade ensured in follow-up gained dilval is higher.
In some embodiments of the invention, in step (5), in the described gaseous mixture containing air and combustion gas, described
Air is 10～15:1 with the volume ratio of described combustion gas.Slag is entered thus, it is possible to aoxidized by the part ferrum in blend melt, from
And obtain nickeliferous dilval of high grade.
The additional aspect of the present invention and advantage will part be given in the following description, and part will become bright from the following description
Aobvious, or recognized by the practice of the present invention.
Accompanying drawing explanation
Above-mentioned and/or the additional aspect of the present invention and advantage will be apparent from from combining the accompanying drawings below description to embodiment
With easy to understand, wherein:
Fig. 1 is the system structure signal extracting dilval according to an embodiment of the invention from limonite type lateritic nickel ore
Figure；
Fig. 2 is the method flow signal extracting dilval according to an embodiment of the invention from limonite type lateritic nickel ore
Figure.
Detailed description of the invention
Embodiments of the invention are described below in detail, and the example of described embodiment is shown in the drawings, the most identical
Or similar label represents same or similar element or has the element of same or like function.Retouch below with reference to accompanying drawing
The embodiment stated is exemplary, it is intended to is used for explaining the present invention, and is not considered as limiting the invention.
In describing the invention, it is to be understood that term " " center ", " longitudinally ", " laterally ", " length ", " width ",
" thickness ", " on ", D score, "front", "rear", "left", "right", " vertically ", " level ", " top ", " end ", " interior ", " outward ",
Orientation or the position relationship of the instruction such as " clockwise ", " counterclockwise ", " axially ", " radially ", " circumferential " are based on shown in the drawings
Orientation or position relationship, be for only for ease of describe the present invention and simplify describe rather than instruction or hint indication device or
Element must have specific orientation, with specific azimuth configuration and operation, be therefore not considered as limiting the invention.
In the present invention, unless otherwise clearly defined and limited, term " install ", " being connected ", " connection ", the art such as " fixing "
Language should be interpreted broadly, and connects for example, it may be fixing, it is also possible to be to removably connect, or integral；Can be machinery
Connect, it is also possible to be electrical connection；Can be to be joined directly together, it is also possible to be indirectly connected to by intermediary, can be two units
Connection within part or the interaction relationship of two elements, unless otherwise clear and definite restriction.Ordinary skill for this area
For personnel, above-mentioned term concrete meaning in the present invention can be understood as the case may be.
In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score can be
One directly contacts with second feature, or the first and second features are by intermediary mediate contact.And, fisrt feature is
Two features " on ", " top " and " above " but fisrt feature directly over second feature or oblique upper, or be merely representative of first
Characteristic level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be fisrt feature
Immediately below second feature or obliquely downward, or it is merely representative of fisrt feature level height less than second feature.
In one aspect of the invention, the present invention propose a kind of from limonite type lateritic nickel ore extract dilval be
System.According to embodiments of the invention, with reference to Fig. 1, this system includes mixing arrangement 100, ball-making device 200, reduction roasting
Molten point of stove 500 of device 300, rapid melting device 400 and combustion gas.
According to embodiments of the invention, mixing arrangement 100 has lateritic nickel ore entrance 101, reduction coal entrance 102, additive
Entrance 103 and mixed material outlet 104, and be suitable to lateritic nickel ore, reduction coal and additive for carrying out mixed processing,
Such that it is able to obtain mixed material.
According to one embodiment of present invention, the nickel content in lateritic nickel ore is 0.5～1.4wt%, and iron content is 40～50wt%.
Thus, the limonite type lateritic nickel ore that the application can use nickeliferous grade low prepares the dilval that nickel is of high grade, from
And the production cost of dilval can be reduced while expanding the raw material sources of dilval.
According to still a further embodiment, the mixing match of lateritic nickel ore, reduction coal and additive is limited the most especially
System, those skilled in the art can select according to actual needs, according to a particular embodiment of the invention, lateritic nickel ore,
Reduction coal and additive can be that 100:5～25:3～15 mixes according to mass ratio.Inventor finds, if reduction coal
Addition too low, the reduction effect of metallized pellet can be affected, and if the addition of reduction coal is too high, product can not be improved
The technical specification of product, and the reduction coal wasting of resources can be caused, improve production cost, and the consumption of additive is intended to assist laterite
The reduction of nickel in nickel minerals, finds in test that too high or too low consumption all can reduce the reduction effect of nickel.
According to another embodiment of invention, the particular type of reduction coal is not particularly restricted, according to the concrete reality of the present invention
Executing example, reduction coal can be at least one in anthracite, bituminous coal, semi-coke and semicoke.
According to another embodiment of invention, the particular type of additive is not particularly restricted, according to the concrete reality of the present invention
Execute example, additive can be in alkali metal oxide, alkali metal salt, alkaline earth oxide and alkali salt extremely
Few one.Inventor finds, in the reduction process of lateritic nickel ore, such additive can be from forsterite or fayalite
Displace NiO, to improve the activity of NiO, thus significantly reduce reducing and smelting temperature so that the reducing condition of lateritic nickel ore
It is greatly improved, promotes that reduction reaction is carried out.
According to embodiments of the invention, ball-making device 200 has mixed material entrance 201 and mixing pelletizing outlet 202, mixed
Close material inlet 201 to be connected with mixed material outlet 104, and be suitable to mixed material be carried out ball processed, such that it is able to mixed
Close pelletizing.It should be noted that the granularity of mixing pelletizing can be selected by those skilled in the art according to actual needs.
According to embodiments of the invention, reduction roasting device 300 has mixing pelletizing entrance 301 and metallized pellet outlet 302,
Mixing pelletizing entrance 301 is connected with mixing pelletizing outlet 202, and is suitable to enter the supply of mixing pelletizing to reduction roasting device
Row reduction roasting processes, such that it is able to obtain metallized pellet.It should be noted that those skilled in the art can be according to reality
Border needs to select the condition of reduction roasting processing procedure.
According to one embodiment of present invention, the degree of metalization of metallized pellet can be 40～60%.Thus, it is possible to significantly carry
The grade of high follow-up gained dilval.
According to still a further embodiment, the particular type of reduction roasting device is not particularly restricted, art technology
Personnel can select according to actual, and according to a particular embodiment of the invention, reduction roasting device can be rotary kiln, turn
End stove, car-bottom furnace or tunnel cave.
According to embodiments of the invention, rapid melting device 400 has metallized pellet entrance 401 and blend melt outlet 402,
Metallized pellet entrance 401 is connected with metallized pellet outlet 302, and is suitable to metallized pellet is carried out melt processed, from
And the blend melt containing nickel-containing molten iron and slag can be obtained.
According to one embodiment of present invention, the temperature of melt processed is not particularly restricted, and those skilled in the art can root
Selecting according to being actually needed, according to a particular embodiment of the invention, the temperature of melt processed can be 1500～1650 Celsius
Degree.
According to still a further embodiment, the particular type of rapid melting device is not particularly restricted, art technology
Personnel can select according to actual needs, and according to a particular embodiment of the invention, rapid melting device can be electric arc furnace
Or mineral hot furnace.
According to still another embodiment of the invention, in the blend melt containing nickel-containing molten iron and slag, in nickel-containing molten iron, nickel contains
Amount is 1～4wt%.Thus, can ensure that in gained dilval, nickel has higher grade by subsequent treatment.
According to embodiments of the invention, the molten point stove 500 of combustion gas has burner 501, blend melt entrance 502, dilval go out
Mouth 503 and slag outlet 504, blend melt entrance 502 is connected with blend melt outlet 402, and is suitable to containing air
To molten point of stove of combustion gas, molten divisional processing is carried out with the gaseous mixture of combustion gas and the blend melt supply containing nickel-containing molten iron and slag,
Such that it is able to obtain dilval and slag.Inventor find, by will fusing after obtained by containing nickel-containing molten iron and slag
Blend melt heat together be fed in molten point of stove of combustion gas, utilize combustion gas to melt the burner arranged on point stove and control to enter that combustion gas is molten to divide
The air of stove and gas proportion control combustion gas and melt the atmosphere in point stove so that carry out after a part of ferrum selective oxidation in molten iron
Slag, and ensure that nickel is not oxidized and (due to the existence of NiO+Fe=Ni+FeO reaction, even if nickel is oxidized, also can be put by ferrum
Change), such that it is able to obtain the dilval that nickel grade is higher, and then can drop while expanding the raw material sources of dilval
The production cost of low dilval.It should be noted that those skilled in the art can concrete to combustion gas according to actual needs
Type selects.
According to still a further embodiment, in the gaseous mixture containing air and combustion gas, the volume ratio of air and combustion gas can
Think 10～15:1.Inventor finds, the burning of combustion gas needs the oxygen in air, on the premise of fuel gas supply amount is certain, empty
Firing ratio if too low, combustion gas can not fully be burnt, and on the one hand causes the thermal efficiency in stove low, on the other hand oxygen depletion in stove
It not oxidizing atmosphere in causing stove；A part of nickel can be caused in the case of air-fuel ratio is too high to cause nickel also with ferrum oxidation slag input
Loss.Thus, the air-fuel ratio using the application scope not only can guarantee that the heat efficiency of supply in stove but also had been provided that suitable atmosphere.
Inventor finds, it is that heating rate is slow that the shortcoming of point stove is melted in combustion gas, and production efficiency is low, and advantage is to be conveniently adjusted
Atmosphere in stove；But electric arc furnace or mineral hot furnace heating rate soon are difficult to control furnace atmosphere, therefore the application electric arc furnace or ore deposit
A hot stove point stove molten with combustion gas is combined, and limonite type lateritic nickel ore is first reduced by the advantage that can comprehensively utilize the two
Smelting obtains metallized pellet, then obtained hot being introduced in electric arc furnace or mineral hot furnace of metallized pellet is rapidly heated
Fusing is smelted, and nickel-containing molten iron and slag after fusing further play molten point of stove of feeding combustion gas and smelt, and by controlling air-fuel ratio, make ferrum
Enter slag after a part of selective oxidation of ferrum in water, reach to improve the purpose of the grade of nickel in dilval with this.
The system extracting dilval from limonite type lateritic nickel ore according to embodiments of the present invention logical by reduction roasting device with
The molten point stove of rapid melting device and combustion gas is used in series so that containing the mixing pelletizing of the low limonite type lateritic nickel ore of nickel grade
Carrying out reduction treatment in reduction roasting device, obtained metallized pellet supply quickly rises to rapid melting device
Temperature fusing is smelted, and nickel-containing molten iron obtained after fusing and the blend melt of slag further play heat and be fed in molten point of stove of combustion gas,
Utilize combustion gas to melt the burner arranged on point stove to control to enter combustion gas and melt the air of point stove and gas proportion combustion gas is molten to divide in stove to control
Atmosphere so that molten iron carries out after a part of ferrum selective oxidation slag, and ensure nickel not oxidized (due to
The existence of NiO+Fe=Ni+FeO reaction, even if nickel is oxidized, also can be replaced by iron), such that it is able to it is higher to obtain nickel grade
Dilval, and then the production cost of dilval can be reduced while expanding the raw material sources of dilval.
As it has been described above, the system extracting dilval from limonite type lateritic nickel ore according to embodiments of the present invention can have choosing
From at least one following advantage:
The system extracting dilval from limonite type lateritic nickel ore according to embodiments of the present invention opens limonite type laterite
The new way of nickel minerals pyrometallurgical smelting high-grade nickel ferroalloy；
The system extracting dilval from limonite type lateritic nickel ore according to embodiments of the present invention by electric arc furnace or mineral hot furnace and
The molten point stove of combustion gas is used in series smelting limonite type lateritic nickel ore, it is possible to comprehensive utilization electric furnace quick heating and molten point of furnace atmosphere of combustion gas
The advantage being easily controlled, smelts the ferronickel of meeting the market requirement expeditiously from limonite type lateritic nickel ore.
In the second aspect of the invention, the present invention proposes a kind of side extracting dilval from limonite type lateritic nickel ore
Method.According to embodiments of the invention, the method is to use the above-mentioned system extracting dilval from limonite type lateritic nickel ore
Carry out.According to a particular embodiment of the invention, with reference to Fig. 2, the method includes:
S100: the supply of lateritic nickel ore, reduction coal and additive is carried out mixed processing to mixing arrangement
According to embodiments of the invention, the supply of lateritic nickel ore, reduction coal and additive is carried out mixed processing to mixing arrangement,
Such that it is able to obtain mixed material.
According to one embodiment of present invention, the nickel content in lateritic nickel ore is 0.5～1.4wt%, and iron content is 40～50wt%.
Thus, the limonite type lateritic nickel ore that the application can use nickeliferous grade low prepares the dilval that nickel is of high grade, from
And the production cost of dilval can be reduced while expanding the raw material sources of dilval.
According to still a further embodiment, the mixing match of lateritic nickel ore, reduction coal and additive is limited the most especially
System, those skilled in the art can select according to actual needs, according to a particular embodiment of the invention, lateritic nickel ore,
Reduction coal and additive can be that 100:5～25:3～15 mixes according to mass ratio.Inventor finds, if reduction coal
Addition too low, the reduction effect of metallized pellet can be affected, and if the addition of reduction coal is too high, product can not be improved
The technical specification of product, and the reduction coal wasting of resources can be caused, improve production cost, and the consumption of additive is intended to assist laterite
The reduction of nickel in nickel minerals, finds in test that too high or too low consumption all can reduce the reduction effect of nickel.
According to still another embodiment of the invention, the particular type of reduction coal is not particularly restricted, concrete according to the present invention
Embodiment, reduction coal can be at least one in anthracite, bituminous coal, semi-coke and semicoke.
According to still another embodiment of the invention, the particular type of additive is not particularly restricted, concrete according to the present invention
Embodiment, additive can be in alkali metal oxide, alkali metal salt, alkaline earth oxide and alkali salt
At least one.Inventor finds, in the reduction process of lateritic nickel ore, such additive can be from forsterite or fayalite
In displace NiO, to improve the activity of NiO, thus significantly reduce reducing and smelting temperature so that the reduction bar of lateritic nickel ore
Part is greatly improved, and promotes that reduction reaction is carried out.
S200: mixed material supply is carried out ball processed to ball-making device
According to embodiments of the invention, mixed material supply is carried out ball processed to ball-making device, such that it is able to obtain mixing ball
Group.It should be noted that the granularity of mixing pelletizing can be selected by those skilled in the art according to actual needs.
S300: the supply of mixing pelletizing is carried out reduction roasting process to reduction roasting device
According to embodiments of the invention, the supply of mixing pelletizing is carried out reduction roasting process to reduction roasting device, thus can
To obtain metallized pellet.It should be noted that reduction roasting can be processed by those skilled in the art according to actual needs
The condition of journey selects.
According to one embodiment of present invention, the degree of metalization of metallized pellet can be 40～60%.Thus, it is possible to significantly carry
The grade of high follow-up gained dilval.
According to still a further embodiment, the particular type of reduction roasting device is not particularly restricted, art technology
Personnel can select according to actual, and according to a particular embodiment of the invention, reduction roasting device can be rotary kiln, turn
End stove, car-bottom furnace or tunnel cave.
S400: metallized pellet supply is carried out melt processed to rapid melting device
According to embodiments of the invention, metallized pellet supply is carried out melt processed to rapid melting device, such that it is able to
To containing nickel-containing molten iron and the blend melt of slag.
According to one embodiment of present invention, the temperature of melt processed is not particularly restricted, and those skilled in the art can root
Selecting according to being actually needed, according to a particular embodiment of the invention, the temperature of melt processed can be 1500～1650 Celsius
Degree.
According to still a further embodiment, the particular type of rapid melting device is not particularly restricted, art technology
Personnel can select according to actual needs, and according to a particular embodiment of the invention, rapid melting device can be electric arc furnace
Or mineral hot furnace.
According to still another embodiment of the invention, in the blend melt containing nickel-containing molten iron and slag, in nickel-containing molten iron, nickel contains
Amount is 1～4wt%.Thus, can ensure that in gained dilval, nickel has higher grade by subsequent treatment.
S500: the gaseous mixture containing air and combustion gas and the supply of the blend melt containing nickel-containing molten iron and slag are melted to combustion gas
Divide and stove carries out molten divisional processing
According to embodiments of the invention, the gaseous mixture containing air and combustion gas and the mixing containing nickel-containing molten iron and slag are melted
Body supply carries out molten divisional processing, such that it is able to obtain dilval and slag to molten point of stove of combustion gas.Inventor finds, passes through
By obtained being fed in molten point of stove of combustion gas containing nickel-containing molten iron heat together with the blend melt of slag after fusing, utilize combustion gas
The molten air dividing the burner arranged on stove control entrance combustion gas to melt point stove and gas proportion melt the atmosphere in point stove to control combustion gas,
Make molten iron carries out slag after a part of ferrum selective oxidation, and ensure that nickel is not oxidized (owing to NiO+Fe=Ni+FeO is anti-
The existence answered, even if nickel is oxidized, also can be replaced by iron), such that it is able to obtain the dilval that nickel grade is higher, Jin Erke
To reduce the production cost of dilval while expanding the raw material sources of dilval.It should be noted that this area skill
The particular type of combustion gas can be selected by art personnel according to actual needs.
According to still a further embodiment, in the gaseous mixture containing air and combustion gas, the volume ratio of air and combustion gas can
Think 10～15:1.Inventor finds, the burning of combustion gas needs the oxygen in air, on the premise of fuel gas supply amount is certain, empty
Firing ratio if too low, combustion gas can not fully be burnt, and on the one hand causes the thermal efficiency in stove low, on the other hand oxygen depletion in stove
It not oxidizing atmosphere in causing stove；A part of nickel can be caused in the case of air-fuel ratio is too high to cause nickel also with ferrum oxidation slag input
Loss.Thus, the air-fuel ratio using the application scope not only can guarantee that the heat efficiency of supply in stove but also had been provided that suitable atmosphere.
Inventor finds, it is that heating rate is slow that the shortcoming of point stove is melted in combustion gas, and production efficiency is low, and advantage is to be conveniently adjusted
Atmosphere in stove；But electric arc furnace or mineral hot furnace heating rate soon are difficult to control furnace atmosphere, therefore the application electric arc furnace or ore deposit
A hot stove point stove molten with combustion gas is combined, and limonite type lateritic nickel ore is first reduced by the advantage that can comprehensively utilize the two
Smelting obtains metallized pellet, then obtained hot being introduced in electric arc furnace or mineral hot furnace of metallized pellet is rapidly heated
Fusing is smelted, and nickel-containing molten iron and slag after fusing further play molten point of stove of feeding combustion gas and smelt, and by controlling air-fuel ratio, make ferrum
Enter slag after a part of selective oxidation of ferrum in water, reach to improve the purpose of the grade of nickel in dilval with this.
The method extracting dilval from limonite type lateritic nickel ore according to embodiments of the present invention logical by reduction roasting device with
The molten point stove of rapid melting device and combustion gas is used in series so that containing the mixing pelletizing of the low limonite type lateritic nickel ore of nickel grade
Carrying out reduction treatment in reduction roasting device, obtained metallized pellet supply quickly rises to rapid melting device
Temperature fusing is smelted, and nickel-containing molten iron obtained after fusing and the blend melt of slag further play heat and be fed in molten point of stove of combustion gas,
Utilize combustion gas to melt the burner arranged on point stove to control to enter combustion gas and melt the air of point stove and gas proportion combustion gas is molten to divide in stove to control
Atmosphere so that molten iron carries out after a part of ferrum selective oxidation slag, and ensure nickel not oxidized (due to
The existence of NiO+Fe=Ni+FeO reaction, even if nickel is oxidized, also can be replaced by iron), such that it is able to it is higher to obtain nickel grade
Dilval, and then the production cost of dilval can be reduced while expanding the raw material sources of dilval.
Below with reference to specific embodiment, present invention is described, it should be noted that these embodiments are the most descriptive
, and limit the present invention never in any form.
Embodiment 1
By in limonite type lateritic nickel ore (containing Ni 0.7wt%, TFe 41wt%), anthracite and sodium carbonate supply to mixing arrangement
Dispensing also mixes, and obtains mixed material, then by carrying out ball processed in this mixed material supply to marble forming machine and drying, is mixed
Close pelletizing, then obtained mixing pelletizing supply is carried out reduction roasting to rotary hearth furnace, obtain metallized pellet (metal
Rate is 50%), it is warming up to 1600 DEG C in then obtained metallized pellet hot-loading and hot-conveying being entered electric arc furnace and melts,
Nickel-containing molten iron (nickeliferous 2.7%) and slag after fusing are together poured in molten point of stove of combustion gas, make gas furnace by adjusting air-fuel ratio
Interior O2Mean concentration, 15%, is smelted and is obtained dilval, Ni grade 4.8%, Fe grade 94.6% after terminating.
Embodiment 2
The supply of limonite type lateritic nickel ore (containing Ni 0.5wt%, TFe 45wt%), semi-coke and calcium carbonate is joined to mixing arrangement
Expect and mix, obtaining mixed material, then by this mixed material supply to marble forming machine carrying out ball processed and drying, being mixed
Pelletizing, then carries out reduction roasting by obtained mixing pelletizing supply to rotary furnace, obtains metallized pellet (metallization
Rate is 46%), it is warming up to 1550 DEG C in then obtained metallized pellet hot-loading and hot-conveying being entered mineral hot furnace and melts,
Nickel-containing molten iron (nickeliferous 1.9%) and slag after fusing are together poured in molten point of stove of combustion gas, make gas furnace by adjusting air-fuel ratio
Interior O2Mean concentration, 18%, is smelted and is obtained dilval, Ni grade 4.1%, Fe grade 95.3% after terminating.
Embodiment 3
By in limonite type lateritic nickel ore (containing Ni 1.2wt%, TFe 38wt%), semicoke and calcium hydroxide supply to mixing arrangement
Dispensing also mixes, and obtains mixed material, then by carrying out ball processed in this mixed material supply to marble forming machine and drying, is mixed
Close pelletizing, then obtained mixing pelletizing supply is carried out reduction roasting to rotary furnace, obtain metallized pellet (metal
Rate is 55%), it is warming up to 1550 DEG C in then obtained metallized pellet hot-loading and hot-conveying being entered mineral hot furnace and melts,
Nickel-containing molten iron (nickeliferous 3.7%) and slag after fusing are together poured in molten point of stove of combustion gas, make gas furnace by adjusting air-fuel ratio
Interior O2Mean concentration, 13%, is smelted and is obtained dilval, Ni grade 5.2%, Fe grade 93.9% after terminating.
In the description of this specification, reference term " embodiment ", " some embodiments ", " example ", " concrete example ",
Or specific features, structure, material or the feature bag that the description of " some examples " etc. means to combine this embodiment or example describes
It is contained at least one embodiment or the example of the present invention.In this manual, to the schematic representation of above-mentioned term necessarily
It is directed to identical embodiment or example.And, the specific features of description, structure, material or feature can be arbitrary
Individual or multiple embodiment or example combine in an appropriate manner.Additionally, in the case of the most conflicting, the skill of this area
The feature of the different embodiments described in this specification or example and different embodiment or example can be combined by art personnel
And combination.
Although above it has been shown and described that embodiments of the invention, it is to be understood that above-described embodiment is exemplary,
Being not considered as limiting the invention, those of ordinary skill in the art within the scope of the invention can be to above-described embodiment
It is changed, revises, replaces and modification.
Claims (10)
1. the system extracting dilval from limonite type lateritic nickel ore, it is characterised in that including:
Mixing arrangement, described mixing arrangement has lateritic nickel ore entrance, reduction coal entrance, additive entrance and mixed material and goes out
Mouthful；
Ball-making device, described ball-making device has mixed material entrance and mixing pelletizing outlet, described mixed material entrance and institute
State mixed material outlet to be connected；
Reduction roasting device, described reduction roasting device has mixing pelletizing entrance and metallized pellet outlet, described mixing ball
Group's entrance is connected with the outlet of described mixing pelletizing；
Rapid melting device, described rapid melting device has metallized pellet entrance and blend melt outlet, described metallization
Pelletizing entrance is connected with the outlet of described metallized pellet；
Molten point of stove of combustion gas, the molten point stove of described combustion gas has the outlet of burner, blend melt entrance, dilval and slag outlet,
Described blend melt entrance is connected with the outlet of described blend melt.
System the most according to claim 1, it is characterised in that described reduction roasting device be rotary kiln, rotary hearth furnace,
Car-bottom furnace or tunnel cave.
System the most according to claim 1 and 2, it is characterised in that described rapid melting device is electric arc furnace or ore deposit heat
Stove.
4. the system utilized according to any one of claim 1-3 extracts dilval from limonite type lateritic nickel ore
Method, it is characterised in that including:
(1) supply of described lateritic nickel ore, reduction coal and additive is carried out mixed processing to described mixing arrangement, in order to
To mixed material；
(2) supply of described mixed material is carried out ball processed to described ball-making device, in order to obtain mixing pelletizing；
(3) supply of described mixing pelletizing is carried out reduction roasting process to described reduction roasting device, in order to metallized
Pelletizing；
(4) supply of described metallized pellet is carried out melt processed to described rapid melting device, in order to obtain containing containing ferronickel
Water and the blend melt of slag；And
(5) by the most described to the gaseous mixture containing air and combustion gas and the described blend melt supply containing nickel-containing molten iron and slag
Molten point of stove of combustion gas carries out molten divisional processing, in order to obtain dilval and slag,
Wherein, in step (1), the nickel content in described lateritic nickel ore is 0.5～1.4wt%, and iron content is 40～50wt%.
Method the most according to claim 4, it is characterised in that in step (1), described lateritic nickel ore, described
Reduction coal and described additive are that 100:5～25:3～15 mixes according to mass ratio.
6., according to the method described in claim 4 or 5, it is characterised in that in step (1), described reduction coal is choosing
At least one in anthracite, bituminous coal, semi-coke and semicoke.
7. according to the method according to any one of claim 4-6, it is characterised in that in step (1), described interpolation
Agent is at least one in alkali metal oxide, alkali metal salt, alkaline earth oxide and alkali salt.
Method the most according to claim 4, it is characterised in that in step (3), the gold of described metallized pellet
Belonging to rate is 40～60%.
Method the most according to claim 4, it is characterised in that in step (4), the temperature of described melt processed
It is 1500～1650 degrees Celsius,
Optional, in the described blend melt containing nickel-containing molten iron and slag, in described nickel-containing molten iron, the content of nickel is 1～4wt%.
Method the most according to claim 4, it is characterised in that in step (5), described containing air with combustion
In the gaseous mixture of gas, described air is 10～15:1 with the volume ratio of described combustion gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610418493.XA CN105907967A (en) | 2016-06-13 | 2016-06-13 | System and method for extracting ferronickel alloy from limonite type lateritic nickel ore |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610418493.XA CN105907967A (en) | 2016-06-13 | 2016-06-13 | System and method for extracting ferronickel alloy from limonite type lateritic nickel ore |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105907967A true CN105907967A (en) | 2016-08-31 |
Family
ID=56750037
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610418493.XA Pending CN105907967A (en) | 2016-06-13 | 2016-06-13 | System and method for extracting ferronickel alloy from limonite type lateritic nickel ore |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105907967A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107012321A (en) * | 2017-02-23 | 2017-08-04 | 江苏省冶金设计院有限公司 | The method for preparing acid pellet |
| CN110983043A (en) * | 2019-11-28 | 2020-04-10 | 武汉科技大学 | Method for preparing high-grade ferronickel from medium-low grade laterite-nickel ore |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101020958A (en) * | 2006-12-22 | 2007-08-22 | 昆明贵金属研究所 | Combined bottom rotating furnace-electric furnace process for treating red mud nickel ore to produce ferronickel |
| CN101935794A (en) * | 2010-10-11 | 2011-01-05 | 北京科技大学 | Method for producing ferro-nickel alloy by using nickel-bearing laterite in shaft furnace and smelting furnace |
| 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 |
| CN102643997A (en) * | 2012-04-09 | 2012-08-22 | 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 |
| CN105033269A (en) * | 2015-08-12 | 2015-11-11 | 北京神雾环境能源科技集团股份有限公司 | Method and system for preparing carbonyl nickel powder through laterite nickel ore |
| CN205741152U (en) * | 2016-06-13 | 2016-11-30 | 江苏省冶金设计院有限公司 | The system of dilval is extracted from limonite type lateritic nickel ore |
-
2016
- 2016-06-13 CN CN201610418493.XA patent/CN105907967A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101020958A (en) * | 2006-12-22 | 2007-08-22 | 昆明贵金属研究所 | Combined bottom rotating furnace-electric furnace process for treating red mud nickel ore to produce ferronickel |
| CN101935794A (en) * | 2010-10-11 | 2011-01-05 | 北京科技大学 | Method for producing ferro-nickel alloy by using nickel-bearing laterite in shaft furnace and smelting furnace |
| 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 |
| CN102643997A (en) * | 2012-04-09 | 2012-08-22 | 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 |
| CN105033269A (en) * | 2015-08-12 | 2015-11-11 | 北京神雾环境能源科技集团股份有限公司 | Method and system for preparing carbonyl nickel powder through laterite nickel ore |
| CN205741152U (en) * | 2016-06-13 | 2016-11-30 | 江苏省冶金设计院有限公司 | The system of dilval is extracted from limonite type lateritic nickel ore |
Non-Patent Citations (2)
| Title |
|---|
| 周梦公: "《工厂系统节电与节电工程》", 31 July 2008 * |
| 郭亚光等: "红土镍矿选择性还原熔分制备粒状镍铁", 《烧结球团》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107012321A (en) * | 2017-02-23 | 2017-08-04 | 江苏省冶金设计院有限公司 | The method for preparing acid pellet |
| CN110983043A (en) * | 2019-11-28 | 2020-04-10 | 武汉科技大学 | Method for preparing high-grade ferronickel from medium-low grade laterite-nickel ore |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106609325B (en) | Oxygen-rich coal dust melting and reducing lateritic nickel ore technique and fusion reducing furnace | |
| CN106086469B (en) | A kind of method and system for extracting nickel oxide using lateritic nickel ore | |
| CN105969981A (en) | Process for comprehensively utilizing vanadium-titanium magnetite | |
| CN105734278A (en) | Treatment method of laterite-nickel ores | |
| CN102277462A (en) | Method for comprehensive utilization of vanadium titanomagnetite | |
| CN111378851A (en) | System and method for treating laterite-nickel ore | |
| CN106086467A (en) | A kind of method and system utilizing lateritic nickel ore to extract nickel oxide | |
| CN104195279A (en) | Process for preparing ferric-nickel from laterite-nickel ore | |
| CN107385235B (en) | Process and device for smelting ferronickel by adopting pre-reduction preheating kiln and molten pool smelting furnace | |
| CN103451451A (en) | Ferro-nickel alloy production technology with laterite nickel ore processed through oxygen enrichment hot air shaft furnace | |
| CN103388082A (en) | Production method of crude copper and production device for production of crude copper | |
| CN103334014A (en) | Method and device for cleaning copper smelting and melting slag | |
| CN206956109U (en) | The oxygen-enriched molten device for dividing lateritic nickel ore of fine coal reduction | |
| CN105907967A (en) | System and method for extracting ferronickel alloy from limonite type lateritic nickel ore | |
| CN103866115B (en) | The preparation of red soil nickel ore single stage method is containing the method for nickel and stainless steel raw material | |
| CN102191348B (en) | Technological method and device for producing high-grade nickel and stainless steel by using oxidized pellet method | |
| CN205741152U (en) | The system of dilval is extracted from limonite type lateritic nickel ore | |
| CN107099659A (en) | The smelting system and method for a kind of mother liquor of stainless steel | |
| CN106755954A (en) | The processing method of lateritic nickel ore | |
| CN105087913B (en) | The metallurgical method of pellet | |
| CN106702177A (en) | Technology of direct reduction of nickel-iron particles from laterite-nickel ores in rotary kiln | |
| CN105925818A (en) | Method and system for processing high-iron laterite nickel ore | |
| CN206143291U (en) | System for utilize laterite -nickel ore ore deposit to draw nickel oxide | |
| CN102703685A (en) | Method for smelting low-nickel matte through vulcanizing calines in rotary furnace | |
| CN115505755A (en) | Smelting method of high-magnesium low-nickel sulfide concentrate |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination |