CN106148718A - Process the method and system of red mud - Google Patents
Process the method and system of red mud Download PDFInfo
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- CN106148718A CN106148718A CN201610622076.7A CN201610622076A CN106148718A CN 106148718 A CN106148718 A CN 106148718A CN 201610622076 A CN201610622076 A CN 201610622076A CN 106148718 A CN106148718 A CN 106148718A
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- red mud
- dealkalize
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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
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/04—Working-up slag
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/14—Multi-stage processes processes carried out in different vessels or furnaces
-
- 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
- C22B1/16—Sintering; Agglomerating
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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
Abstract
The invention discloses the method and system processing red mud, wherein, the method processing red mud includes: aqueous red mud is carried out drying and processing, in order to obtain being dried red mud；Dry red mud is carried out fine grinding process, in order to obtain red mud micropowder；Described red mud micropowder is carried out in fluid bed under reducing atmosphere prereduction dealkalize process, in order to obtain dealkalize red mud and high-alkali flue dust；Carry out mixing briquetting with reducing agent by described dealkalize red mud, in order to obtain red mud agglomerate；And described red mud agglomerate is carried out in molten point of stove molten divisional processing, in order to obtain molten iron and tailings.Thus using the method can effectively remove the alkali metal in red mud, improve the reproducibility of follow-up red mud iron, solve red mud dealkalization rate low, ferrum reduction effect is poor, and ferrum is difficult to the technical barrier reclaimed.The present invention utilizes a molten point stove deeply to reduce and slag sluicing system simultaneously, is conducive to being recycled rate and the higher product of degree of metalization further, has important economic benefit.
Description
Technical field
The invention belongs to metallurgy and energy technology field, be specifically related to a kind of method and system processing red mud.
Background technology
Red mud is the topmost solid slag produced in aluminum oxide industry production process, and at present, domestic red mud is arranged every year
High-volume more than 30,000,000 t, in addition to small part is applied to the purposes such as manufacture of cement, brickmaking, outdoor the building a dam of most wet method is stored up, now
Red mud accumulation is stored up more than 3.5 hundred million tons.In cement building material field, within 2015, cement consumption state of China is about 2,200,000,000 tons, city
Field is the hugest, but the key constraints that restriction red mud is applied in cement at present is that in red mud, alkali content is too high.Existing
Red mud dealkalization method mainly has lime method, normal pressure suspension and carbonation method, WATER-WASHING METHOD, acid wash.Lime water full-boiled process dealkalize is at high pressure
Or under low pressure, add Calx, and it being allowed to and red mud generation lattice substitution reaction, utilize Ca2+ to replace the Na+ in red mud, Na+ is with solution
Dissolution, thus reach dealkalize purpose.This kind of method dealkalize effect is notable, but dealkalize process exists lime consumption greatly, high in cost of production
Problem.Acid leaching process is that the strong acid leaching red muds such as direct sulphuric acid, hydrochloric acid carry out dealkalize, and it is poor that the method exists operating environment, useless
Liquid measure is big and easily causes secondary pollution problems.Dealkalize cost height causes enterprise and client to utilize the wish of red mud relatively low, merely
Dealkalize or recovery alkali cost-effective can not utilize red mud, thus limit red mud application in terms of cement.
From the point of view of composition, acidic oxide Al in red mud2O3、SiO2Content is the highest, Al in red mud2O3、SiO2Content is special
The highest, need to add substantial amounts of limestone as basic solvent in reduction process.When being added without limestone or addition is less
Time, pelletizing can not sufficiently be reduced, and degree of metalization is the lowest, is unfavorable for follow-up slag sluicing system.When adding more limestone
After, in limestone CaO the most then with FeO, SiO2、Al2O3Form the low-melting compounds such as kirsch-steinite, cause pelletizing
Soft heat is bonding with refractory material seriously, and the metallized pellet therefore obtaining high degree of metalization is more difficult, and existing rotary kiln uses
The method of red mud powder sintering, though dealkalize rate can reach more than 60%, but degree of metalization only has 50%-70%, iron recovery
30%, the easy ring formation of equipment, production has some setbacks.
Therefore, the comprehensive control of red mud and the efficient recovery of metals resources thereof become the focus of people's growing interest.Red mud
The main or outer row of process before use high intensity magnetic separation, extract part iron ore concentrate, mine tailing is directly stored up.
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 present invention
One purpose is propose a kind of method with the process red mud that red mud dealkalization rate is high, ferrum reduction effect is good and easily reclaims and be
System.
According to an aspect of the present invention, the present invention proposes a kind of method processing red mud, including: aqueous red mud is entered
Row drying and processing, in order to obtain being dried red mud；Dry red mud is carried out fine grinding process, in order to obtain red mud micropowder；By described
Red mud micropowder carries out prereduction dealkalize process in fluid bed under reducing atmosphere, in order to obtain dealkalize red mud and high-alkali cigarette
Dirt；Carry out mixing briquetting with reducing agent by described dealkalize red mud, in order to obtain red mud agglomerate；And by described red mud agglomerate molten
Molten divisional processing is carried out, in order to obtain molten iron and tailings in dividing stove.
Alkali during thus the present invention uses fluid bed reduction fine powder material red mud, can be carried out the alkali metal in red mud effectively
Removing, improves the reproducibility of follow-up red mud iron, and can efficient recovery alkali metal and ferrum element, solve red mud dealkalization rate low,
Ferrum reduction effect is poor, and ferrum is difficult to the technical barrier reclaimed.The present invention utilizes a molten point stove deeply to reduce and slag sluicing system simultaneously, has
It is beneficial to be recycled rate and the higher product of degree of metalization further, there is important economic benefit.
It addition, the method for process red mud according to the above embodiment of the present invention can also have following additional technology spy
Levy:
In some embodiments of the invention, the particle mean size of described red mud micropowder is no more than 50 microns.Thus may be used
To improve dealkalize efficiency and the reduction efficiency of metal.
In some embodiments of the invention, the temperature that described prereduction dealkalize processes is 800-1050 DEG C, and the time is 30-
60min.Thus can effectively remove the alkali in red mud, reduce that red mud is follow-up proposes the alkali metal erosion to furnace lining during ferrum,
And metal in red mud can be carried out prereduction.
In some embodiments of the invention, described reducibility gas is H2Mixed gas with CO.Thus can enter one
Step improves the reduction efficiency of metal in red mud.
In some embodiments of the invention, in described reducing atmosphere, reducibility gas content is not less than 70 volume %, excellent
Selection of land, for 75-90 volume %.Thus can improve metal reduction reaction efficiency in red mud.
In some embodiments of the invention, it is that 100:5-10 enters by described dealkalize red mud and reducing agent according to mass ratio
Row mixing briquetting.The most advantageously in follow-up molten divisional processing.
In some embodiments of the invention, the temperature of described molten divisional processing is 1450-1600 DEG C, and the time is 40-
90min.Thus be conducive to red mud deeply to reduce, be recycled rate and the higher product of degree of metalization.
According to a further aspect in the invention, the present invention also proposes a kind of system processing red mud, and this system is before implementing
The method processing red mud of face embodiment, this system includes: drying unit, and described drying unit has aqueous red mud entrance and does
Dry red mud exports；
Ore grinding device, described ore grinding device has dry red mud entrance and the outlet of red mud micropowder, and described dry red mud enters
Mouth is connected with the outlet of described dry red mud；
Fluid bed, described fluid bed have reducibility gas entrance, red mud micropowder entrance, dealkalize red mud outlet and high-alkali
Flue dust exports, and described red mud micropowder entrance is connected with the outlet of described red mud micropowder；
Briquetting device, described briquetting device has dealkalize red mud entrance, reducing agent entrance, additive entrance and red mud agglomerate
Outlet, described dealkalize red mud entrance is connected with the outlet of described dealkalize red mud；And
Molten point of stove, a described molten point stove has the outlet of red mud agglomerate entrance, molten iron and tailings outlet, described red mud agglomerate entrance
It is connected with described red mud lump outlet.
Thus use this system to utilize fluid bed that ultra-fine red mud fine powder is carried out dealkalize process, be possible not only to effectively to remove red
Alkali metal in mud, reduces that red mud is follow-up proposes the alkali metal erosion to furnace lining during ferrum, it is possible to obtain Lower alrali content
Mine tailing.Fluid bed can also carry out prereduction to the ferrum in red mud while dealkalize, is conducive to improving later stage ferrum reduction efficiency,
It is easy to obtain the metallized pellet of high degree of metalization.Further, the metal that prereduction dealkalize is processed by briquetting device is utilized
With reduction coal briquetting, and in molten point of stove, agglomerate is reduced deeply, be conducive at high temperature melting poly-by the ferrum granule of reduction
Integrated molten iron, it is achieved slag, ferrum separate, and are recycled rate and the higher product of degree of metalization.Moreover, the present invention can also be led to
Cross high-alkali exhanst gas outlet and reclaim the flue dust of high alkali content, and then decrease environmental pollution, it is achieved that resource recycles effectively,
Thus there is significant economic benefit and social benefit.
It addition, the system of process red mud according to the above embodiment of the present invention can also have following additional technology spy
Levy:
In some embodiments of the invention, the system processing red mud of above-described embodiment farther includes: cyclonic separation
Device, described cyclone separator is connected with the outlet of described high-alkali flue dust.Thus utilize described cyclone separator and described high-alkali flue dust
Outlet is connected and reducing gas in fluid bed enters after volatilization exhanst gas outlet, by the high-alkali flue dust of dedusting isolated, it is achieved
Resource reclaim, reduces environmental pollution.
In some embodiments of the invention, a described molten point stove is molten point of stove of combustion gas.Thus be conducive to obtaining molten iron and tail
Slag, and then realize the separation of ferrum and tailings, it is recycled rate and the higher product of degree of metalization.
Accompanying drawing explanation
Fig. 1 is the flow chart of the method processing red mud according to an embodiment of the invention.
Fig. 2 is the flow chart of the method processing red mud in accordance with another embodiment of the present invention.
Fig. 3 is the structural representation of the system processing red mud according to an embodiment of the invention.
Detailed description of the invention
Embodiments of the invention are described below in detail, and the example of 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.
According to an aspect of the present invention, the present invention proposes a kind of method processing red mud.Specifically real according to the present invention
Execute the method processing red mud of example, including: aqueous red mud is carried out drying and processing, in order to obtain being dried red mud；By dry red mud
Carry out fine grinding process, in order to obtain red mud micropowder；Red mud micropowder is carried out in fluid bed under reducing atmosphere prereduction
Dealkalize processes, in order to obtain dealkalize red mud and high-alkali flue dust；Carry out mixing briquetting with reducing agent by dealkalize red mud, in order to obtain red
Walk block；And red mud agglomerate is carried out in molten point of stove molten divisional processing, in order to obtain molten iron and tailings.
Thus aqueous red mud is taken off in fluid bed through the ultra-fine red mud fine powder dried and obtain after fine grinding process
Alkali processes, and can effectively remove the alkali metal in red mud, and during reducing that red mud is follow-up and carrying ferrum, furnace lining is invaded by alkali metal
Erosion, it is possible to obtain the mine tailing of Lower alrali content.Fluid bed can also carry out prereduction to the ferrum in red mud, favorably while dealkalize
In improving later stage ferrum reduction efficiency, it is simple to obtain the metallized pellet of high degree of metalization.Further, by prereduction dealkalize
The metal of reason and reduction coal briquetting, and in molten point of stove, agglomerate is reduced deeply, be conducive to the ferrum granule of reduction at high temperature
Lower fusing is gathered into molten iron, it is achieved slag, ferrum separate, and are recycled rate and the higher product of degree of metalization.Moreover, the present invention
The flue dust of high alkali content can also be reclaimed, and then decrease environmental pollution, it is achieved that resource recycles effectively, thus have
Significantly economic benefit and social benefit.
According to a particular embodiment of the invention, the process of the specific embodiment of the invention is described in detail below with reference to Fig. 1-2 red
The method of mud.
S100: drying and processing
According to a particular embodiment of the invention, first aqueous red mud is carried out drying and processing, in order to obtain being dried red mud.By
Aqueous red mud is carried out drying and processing to remove most moisture by this, obtains being dried red mud.And then follow-up pre-also
Former dealkalize processes, and improves treatment effeciency.
S200: fine grinding processes
According to a particular embodiment of the invention, dry red mud is carried out fine grinding process, in order to obtain red mud micropowder.According to
The specific embodiment of the present invention, the particle mean size of red mud micropowder is no more than 50 microns.Reducing gas thus can be made with red
Mud is fully contacted, and improves dealkalize efficiency and the reduction efficiency of metal.Inventor finds that red mud micropowder more has compared to pelletizing
It is beneficial to alkali-metal reduction and volatilization.
S300: prereduction dealkalize processes
According to a particular embodiment of the invention, red mud micropowder carries out in fluid bed under reducing atmosphere prereduction to take off
Alkali processes, in order to obtain dealkalize red mud and high-alkali flue dust.Specifically, the temperature that prereduction dealkalize processes is 800-1050 DEG C, time
Between be 30-60min.Thus use the alkali metal that above-mentioned treatment conditions can effectively remove in red mud, reduce red mud follow-up
Propose the alkali metal erosion to furnace lining during ferrum, the prereduction to red mud can also be realized simultaneously.
According to a particular embodiment of the invention, reducibility gas can be H2Mixed gas with CO.Thus at fluid bed
The reducibility gas of interior employing is H2It is more beneficial for promoting the reduction reaction of metal in red mud with the mixed gas of CO.
According to a particular embodiment of the invention, in reducing atmosphere, reducibility gas content is not less than 70 volume %, thus exists
In the reducing atmosphere used in fluid bed, reducing gas content is not less than 70 volume %.Preferably, reproducibility gas in reducing atmosphere
Body burden is 75-90 volume %, thus can improve the efficiency of metal reduction reaction in red mud further.
Thus by adding reproducibility H on fluid bed2Mixed gas with CO carries out the reduction of micropowder red mud, permissible
The effectively alkali metal in removing red mud, reduces that red mud is follow-up proposes the alkali metal erosion to furnace lining during ferrum, it is possible to obtain
The mine tailing of Lower alrali content.Inventor also finds that fluid bed can carry out prereduction to the ferrum in red mud while dealkalize simultaneously,
And then be conducive to accelerating later stage reduction efficiency, obtain the metallized pellet of high degree of metalization.
S400: mixing briquetting
According to a particular embodiment of the invention, carry out mixing briquetting with reducing agent by dealkalize red mud, in order to obtain red mud group
Block.Specifically, it is that 100:5-10 carries out mixing briquetting by dealkalize red mud and reducing agent according to mass ratio.Thus use above-mentioned joining
Follow-up deep reduction reaction in molten point of stove is conducive to, it is simple to be recycled rate and degree of metalization is higher than carrying out mixing briquetting
Metal.It is follow-up that inventor finds according to mass ratio, dealkalize red mud and reducing agent consumption are that 100:5-10 carries out mixing briquetting
Molten divisional processing, the too low dealkalize red mud drastic reduction that is unfavorable for of reducing agent consumption, and the too high production cost that not only increases of reducing agent, and
And it is unfavorable for the high efficiency separation of follow-up molten iron and tailings.
S500: molten divisional processing
According to a particular embodiment of the invention, finally red mud agglomerate is carried out in molten point of stove molten divisional processing, in order to obtain
Molten iron and tailings.Specifically, the temperature of molten divisional processing can be 1450-1600 DEG C, and the time is 40-90min.Thus at molten point of stove
The most deeply reducing, the temperature wherein melting divisional processing is 1450-1600 DEG C, and the time is 40-90min, is conducive to the ferrum of reduction to exist
It is further separated into molten iron and tailings under high temperature, and is assembled by the way of molten point, and then efficiently separate molten iron and tailings,
It is recycled rate and the higher product of degree of metalization.
According to a further aspect in the invention, the present invention also proposes a kind of system for processing red mud, according to the present invention's
Being embodied as, this system is adapted for carrying out the method processing red mud of preceding embodiment.Present invention tool is described in detail below with reference to Fig. 3
The system processing red mud of body embodiment.
The system processing red mud according to a particular embodiment of the invention includes: drying unit 10, and drying unit has and contains
Water red mud entrance 11 and dry red mud outlet 12；Ore grinding device 20, ore grinding device has dry red mud entrance 21 and red mud is ultra-fine
Powder outlet 22, is dried the outlet of red mud entrance 21 and described dry red mud and is connected 12；Fluid bed 30, fluid bed has reducibility gas
Entrance 31, red mud micropowder entrance 32, dealkalize red mud outlet 33 and high-alkali flue dust outlet 34, red mud micropowder entrance 32 and red mud
Micropowder outlet 22 is connected；Briquetting device 40, briquetting device has dealkalize red mud entrance 41, reducing agent entrance 42, additive enter
Mouth 43 and red mud lump outlet 44, dealkalize red mud entrance 41 is connected with dealkalize red mud outlet 33；And molten point of stove 50, molten point of stove
Having red mud agglomerate entrance 51, molten iron outlet 52 and tailings outlet 53, red mud agglomerate entrance 51 is connected with red mud lump outlet 44.
According to a particular embodiment of the invention, utilize above-described embodiment process red mud system to aqueous red mud at
Reason, specifically can be carried out according to the following step:
First, by drying unit 10, aqueous red mud is carried out drying and processing, in order to obtain being dried red mud.Secondly by mill
Dry red mud is carried out fine grinding process by ore deposit device 20, obtains red mud micropowder.Further, by fluid bed 30, red mud is ultra-fine
Powder carries out reduction dealkalize under reducing atmosphere and processes, and obtains dealkalize red mud, and after the alkali in red mud fine powder reduces in fluid bed
It is volatized into high-alkali exhanst gas outlet 34, by the high-alkali flue dust of dedusting isolated.And gone back dealkalize red mud by briquetting device 40
Former dose carries out mix homogeneously briquetting, obtains red mud agglomerate, and red mud agglomerate carries out in molten point of stove 50 molten divisional processing, obtain
Molten iron and tailings.
In traditional recovery red mud, the device of metal is based on rotary kiln, rotary hearth furnace, tunnel cave etc., and these equipment can not be complete
Alkali in full removing red mud, energy consumption is high, and resultant metal rate is low, causes production cost height, production to have some setbacks.The present invention adopts
With fluid bed 300, ultra-fine red mud fine powder is carried out dealkalize process, be possible not only to the alkali metal effectively removing in red mud, reduce
Red mud is follow-up proposes the alkali metal erosion to furnace lining during ferrum, it is possible to obtain the mine tailing of Lower alrali content.Fluid bed 30 is in dealkalize
Ferrum in red mud can also be carried out prereduction simultaneously, be conducive to improving later stage ferrum reduction efficiency, it is simple to obtain high degree of metalization
Metallized pellet.Further, utilize metal and reduction coal briquetting that prereduction dealkalize processes by briquetting device 40, and
In molten point of stove 50, agglomerate is reduced deeply, be conducive at high temperature melting the ferrum granule of reduction being gathered into molten iron, it is achieved slag,
Ferrum separates, and is recycled rate and the higher product of degree of metalization.Moreover, the present invention can also pass through high-alkali exhanst gas outlet 34
Reclaim the flue dust of high alkali content, and then decrease environmental pollution, it is achieved that resource recycles effectively, thus have significantly
Economic benefit and social benefit.
The system processing red mud according to a particular embodiment of the invention, farther includes: cyclone separator 60, whirlwind
Separator 60 is connected with high-alkali flue dust outlet 34.Cyclone separator is thus utilized to be connected will go back in fluid bed with the outlet of high-alkali flue dust
Raw-gas enters exhanst gas outlet after volatilization, by the high-alkali flue dust of dedusting isolated, it is achieved resource reclaim, reduces environment dirty
Dye.
The system processing red mud according to a particular embodiment of the invention, wherein molten point of stove 50 is molten point of stove of combustion gas.By
This carries out deep reduction treatment by a molten point stove 50 to the red mud of dealkalize, is conducive to obtaining molten iron and tailings, and then realizes ferrum and tail
The separation of slag, is recycled rate and the higher product of degree of metalization.
Embodiment 1
Certain red mud, TFe is 30.29%, Na2O is 5.22%.It is finely ground to-0.043mm, red mud breeze after being dried by red mud
Prereduction dealkalize is carried out in sending into fluid bed.(H in fluid bed reduction gas2+ CO) it is 70%, gas temperature is 1020 DEG C, instead
40min between Ying Shi.Red mud sodium content after dealkalize is 0.28%, and after dealkalize, red mud allocates the reduction coal of 10% into, after mix homogeneously
Carrying out briquetting, the agglomerate obtained is distributed in molten point of stove, and melting a point furnace temperature is 1550 DEG C, and agglomerate is deep in molten point of stove to reduce and molten point
Time is 60min, is finally recovered and obtains molten iron and tailings, and in molten iron, Iron grade is 97%, and iron recovery is 92%.
Embodiment 2
Certain red mud, TFe is 30.29%, Na2O is 5.22%.It is finely ground to-0.043mm, red mud breeze after being dried by red mud
Prereduction dealkalize is carried out in sending into fluid bed.(H in fluid bed reduction gas2+ CO) it is 75%, gas temperature is 1020 DEG C, instead
30min between Ying Shi.Red mud sodium content after dealkalize is 0.30%, and after dealkalize, red mud allocates the reduction coal of 8% into, and mix homogeneously is laggard
Row briquetting, the agglomerate obtained is distributed in molten point of stove, and a molten point furnace temperature is 1500 DEG C, agglomerate deep reduction and molten timesharing in molten point of stove
Between be 60min, be finally recovered obtain molten iron and tailings, in molten iron, Iron grade is 97%, and iron recovery is 91%.
Embodiment 3
Certain red mud, TFe is 30.29%, Na2O is 5.22%.It is finely ground to-0.043mm, red mud breeze after being dried by red mud
Prereduction dealkalize is carried out in sending into fluid bed.(H in fluid bed reduction gas2+ CO) it is 75%, gas temperature is 1020 DEG C, instead
30min between Ying Shi.Red mud sodium content after dealkalize is 0.30%, and after dealkalize, red mud allocates the reduction coal of 8% into, and mix homogeneously is laggard
Row briquetting, the agglomerate obtained is distributed in molten point of stove, and a molten point furnace temperature is 1600 DEG C, agglomerate deep reduction and molten timesharing in molten point of stove
Between be 40min, be finally recovered obtain molten iron and tailings, in molten iron, Iron grade is 97%, and iron recovery is 91%.
In describing the invention, it is to be understood that term " " center ", " longitudinally ", " laterally ", " length ", " width ",
" thickness ", " on ", D score, "front", "rear", "left", "right", " vertically ", " level ", " top ", " end " " interior ", " outward ", " up time
Pin ", " counterclockwise ", " axially ", " radially ", the orientation of the instruction such as " circumferential " or position relationship be based on orientation shown in the drawings or
Position relationship, is for only for ease of the description present invention and simplifies description rather than instruction or imply that the device of indication or element must
Must have specific orientation, with specific azimuth configuration and operation, be therefore not considered as limiting the invention.
Additionally, term " first ", " second " are only used for describing purpose, and it is not intended that instruction or hint relative importance
Or the implicit quantity indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can express or
Implicitly include one or more this feature.In describing the invention, " multiple " are meant that two or more,
Unless otherwise expressly limited specifically.
In the present invention, unless otherwise clearly defined and limited, term " install ", " being connected ", " connection ", " fixing " etc.
Term should be interpreted broadly, and connects for example, it may be fixing, it is also possible to be to removably connect, or integral；Can be that machinery connects
Connect, it is also possible to be electrical connection；Can be to be joined directly together, it is also possible to be indirectly connected to by intermediary, in can being two elements
The connection in portion or the interaction relationship of two elements.For the ordinary skill in the art, can be according to concrete feelings
Condition understands above-mentioned term concrete meaning in the present invention.
In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score permissible
It is that the first and second features directly contact, or the first and second features are by intermediary mediate contact.And, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature directly over second feature or oblique upper, or be merely representative of
Fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be
One feature is immediately below second feature or obliquely downward, or is merely representative of fisrt feature level height less than second feature.
In the description of this specification, reference term " embodiment ", " some embodiments ", " example ", " specifically show
Example " or the description of " some examples " etc. means to combine this embodiment or example describes specific features, structure, material or spy
Point is contained at least one embodiment or the example of the present invention.In this manual, to the schematic representation of above-mentioned term not
Identical embodiment or example must be directed to.And, the specific features of description, structure, material or feature can be arbitrary
Individual or multiple embodiment or example combine in an appropriate manner.Additionally, in the case of the most conflicting, the technology of this area
The feature of the different embodiments described in this specification or example and different embodiment or example can be combined by 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 example
Property, it is impossible to being interpreted as limitation of the present invention, those of ordinary skill in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, revises, replaces and modification.
Claims (10)
1. the method processing red mud, it is characterised in that including:
Aqueous red mud is carried out drying and processing, in order to obtain being dried red mud；
Described dry red mud is carried out fine grinding process, in order to obtain red mud micropowder；
Described red mud micropowder is carried out in fluid bed under reducing atmosphere prereduction dealkalize process, in order to obtain dealkalize red mud
With high-alkali flue dust；
Carry out mixing briquetting with reducing agent by described dealkalize red mud, in order to obtain red mud agglomerate；And
Described red mud agglomerate is carried out in molten point of stove molten divisional processing, in order to obtain molten iron and tailings.
The method of process red mud the most according to claim 1, it is characterised in that the particle mean size of described red mud micropowder is
It is not more than 50 microns.
The method of process red mud the most according to claim 1 and 2, it is characterised in that the temperature that described prereduction dealkalize processes
Degree is for 800-1050 DEG C, and the time is 30-60min.
4. according to the method processing red mud described in any one of claim 1-3, it is characterised in that described reducing atmosphere reduces
Property gas content not less than 70 volume %, it is preferable that for 75-90 volume %.
The method of process red mud the most according to claim 4, it is characterised in that described reducibility gas is H2With mixing of CO
Close gas.
6. according to the method processing red mud described in any one of claim 1-5, it is characterised in that by described dealkalize red mud with also
Former dose is that 100:5-10 carries out mixing briquetting according to mass ratio.
7. according to the method processing red mud described in any one of claim 1-6, it is characterised in that the temperature of described molten divisional processing
For 1450-1600 DEG C, the time is 40-90min.
8. the system being adapted for carrying out processing the method for red mud described in any one of claim 1-7, it is characterised in that including:
Drying unit, described drying unit has aqueous red mud entrance and the outlet of dry red mud；
Ore grinding device, described ore grinding device have dry red mud entrance and red mud micropowder outlet, described dry red mud entrance with
The outlet of described dry red mud is connected；
Fluid bed, described fluid bed has reducibility gas entrance, red mud micropowder entrance, the outlet of dealkalize red mud and high-alkali flue dust
Outlet, described red mud micropowder entrance is connected with the outlet of described red mud micropowder；
Briquetting device, described briquetting device has dealkalize red mud entrance, reducing agent entrance, additive entrance and red mud agglomerate and goes out
Mouthful, described dealkalize red mud entrance is connected with the outlet of described dealkalize red mud；And
Molten point of stove, a described molten point stove has the outlet of red mud agglomerate entrance, molten iron and tailings outlet, described red mud agglomerate entrance and institute
State red mud lump outlet to be connected.
System the most according to claim 8, it is characterised in that farther include:
Cyclone separator, described cyclone separator is connected with the outlet of described high-alkali flue dust.
System the most according to claim 8, it is characterised in that a described molten point stove is molten point of stove of combustion gas.
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