CN105907944A - Method and system for treating metallurgical slag - Google Patents
Method and system for treating metallurgical slag Download PDFInfo
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- CN105907944A CN105907944A CN201610270981.0A CN201610270981A CN105907944A CN 105907944 A CN105907944 A CN 105907944A CN 201610270981 A CN201610270981 A CN 201610270981A CN 105907944 A CN105907944 A CN 105907944A
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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
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/24—Binding; Briquetting ; Granulating
- C22B1/242—Binding; Briquetting ; Granulating with binders
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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
- C22B7/001—Dry 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
- 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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- 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 a method and system for treating metallurgical slag. The method comprises the steps that the metallurgical slag, limestone and adhesives are subjected to forming treatment, so that first material pellets are obtained; oxidizing roasting is conducted on the first material pellets, so that fayalite in the metallurgical slag is converted into ferric oxide, and meanwhile oxidizing roasting products are obtained through desulfurization; the oxidizing roasting products are crushed, so that crushed oxidizing roasting products are obtained; the crushed oxidizing roasting products, reducing coal, the adhesives and water are subjected to forming treatment, so that second material pellets are obtained; reducing roasting is conducted on the second material pellets, so that the iron oxide in the second material pellets is converted into iron, and meanwhile reducing roasting products are obtained through desulfurization; and ore grinding and magnetic separation are conducted on the reducing roasting products, so that metal iron powder and tailings are obtained. By the adoption of the method, the problem that reduction of fayalite in the metallurgical slag is difficult is solved, effective separation of the iron element is achieved, and high-quality low-sulfur metal iron powder can be obtained advantageously.
Description
Technical field
The invention belongs to metallurgy industry technical field, particularly to a kind of method and system processing metallurgical slag.
Background technology
In the prior art, along with society and expanding economy, non-ferrous metal yield and consumption figure are also increasing day by day.Adjoint
The smelting process of nonferrous metal product, substantial amounts of metallurgical slag and mine tailing are also discharged.These metallurgical slags pass through mostly
The high-temperature molten-state slag that pyrometallurgical smelting obtains, metallurgical slag shrend can be down to room temperature to reclaim valuable element therein by some
Rear broken use chemical agent carries out flotation, finally gives smelted furnace cinder ore dressing tailings.In these metallurgical slags and ore dressing tailings one
As possibly together with 35～55wt% ferrum, mainly exist mutually with fayalite.Utilize difficulty relatively big, greatly due to metallurgical slag and tailings
Measuring to store up form existence, not only land occupation, heavy metal ion therein also can penetrate into pollution environment in soil；The opposing party
Face, also result in huge waste to resource.In the modern society that various mineral resources reduce day by day, how to realize money
The effective recycling in source becomes the emphasis of research.
In nonferrous metallurgy slag, the dominant of ferrum is fayalite (Fe mutually2SiO4), it is difficult to reduction.Can by analysis-reduction thermodynamics
Knowing, the reduction temperature of metallurgical slag is higher than common iron ore reduction temperature, and the requirement to reducing atmosphere is higher.In addition, ferrum
The fusing point of olivine is low causes metallurgical slag fusing point to be about 1200 DEG C.When carbonaceous pelletizing is when more than 1200 DEG C of reduction, and metallurgical slag melts
Change and make reduction coal be layered with slag, be degrading reacting dynamics condition；When reaction temperature is higher, such as more than 1450 DEG C, then belong to
In melting and reducing, although can reduce, but energy consumption is the highest；If reduction temperature is less than metallurgical slag fusing point, although pelletizing is not
Fusing, metallurgical slag is fully contacted with reduction coal, but fayalite difficult reduction again, reduction rate is slow, reduces the most thorough.
Additionally, nonferrous metallurgy slag contains the sulfur of 0.5%-1.5%, reduction coal contains the sulfur of ＞ 0.5%, in reduction process
The sulfur major part that two kinds of raw materials are brought into enters in metallized pellet, can only remove small part sulfur, make iron powder during mill choosing
Sulfur content is up to more than 0.5%, higher than the requirement to conversion pig, unfavorable to follow-up steelmaking process, if increasing desulfurization process,
Then improve production cost.
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 the side of a kind of process metallurgical slag being produced high-quality low-sulfur metal iron powder by fayalite in reduction metallurgical slag
Method and system.
To this end, according to an aspect of the present invention, the present invention proposes a kind of method processing metallurgical slag, and the method includes:
Described metallurgical slag is carried out the first forming processes with limestone and binding agent, in order to obtain the first material pelletizing；By described first
Material pelletizing carries out oxidizing roasting process, in order to makes the fayalite in described metallurgical slag transfer ferrum oxide to, removes sulfur simultaneously,
And obtain oxidizing roasting product；Described oxidizing roasting product is carried out break process, in order to obtain the oxidizing roasting product crushed；
Described broken oxidizing roasting product is carried out the second forming processes with reduction coal, binding agent and water, in order to obtain the second material
Pelletizing；Described second material pelletizing is carried out reduction roasting process, in order to make the ferrum oxide in described second material pelletizing convert
For ferrum, remove sulfur simultaneously, and obtain reduction roasting product；And described reduction roasting product is carried out mill ore magnetic selection process,
To obtain metal iron powder and tailings.
It addition, the method for process metallurgical slag according to the above embodiment of the present invention can also have a following additional technical characteristic:
In some embodiments of the invention, by described metallurgical slag and limestone and binding agent according to 70-90:10-20:5-10
Mass ratio carries out described first forming processes.Thus, it is possible to the removal efficiency of sulfur in raising metallurgical slag, improve the place of oxidizing roasting
Reason efficiency.
In some embodiments of the invention, by described broken pelletizing and reduction coal, binding agent according to 55-80:15-40:5-10
Mass ratio carries out described second forming processes.Thus, it is possible to significantly improve the treatment effeciency of reduction roasting.
In some embodiments of the invention, in described second molding process, the addition of described water is described cracker
The 5-10% of the gross mass of group, reduction coal and binding agent.In described second molding process, thus add water be conducive to oxygen
Change roasting process is reacted by the calcium oxide of decomposition of limestone and produce calcium hydroxide, and then beneficially calcium hydroxide and reduction ribbing
The reaction of Salmon-Saxl entered, carries out two step desulfurization, the sulfur that removing reduction coal is brought into, it is simple to produce the low-sulfur metal iron powder of high-quality.
In some embodiments of the invention, the temperature that described oxidizing roasting processes is 700-950 degree Celsius.Thus at this oxygen
At a temperature of change, in metallurgical slag, fayalite is destructurized, produce be prone to reduction ferrum oxide, ferrum particle aggregation in roasting, for
Subsequent reactions provides advantage.Meanwhile, limestone reacts with the sulfur in metallurgical slag, the sulfur in removing metallurgical slag, enters
Row one-step desulfurization, alleviates the desulfurization load of subsequent process.
In some embodiments of the invention, the time that described oxidizing roasting processes is 20-50 minute.Thus at oxidizing roasting
The time of reason is within 20-50 minute, to complete fayalite oxidation reaction in metallurgical slag, generates the ferric oxide particles that ferrum is assembled, with
Time beneficially limestone and metallurgical slag react and carry out one-step desulfurization, alleviate the desulfurization load of subsequent process.
In some embodiments of the invention, the temperature that described reduction roasting processes is 1100-1300 degree Celsius.Thus at this
Ferrum oxide oxidizing roasting obtained under reduction temperature reacts production ferrum simple substance further with reduction coal, passes through calcium hydroxide simultaneously
The reaction of Salmon-Saxl brought into reduction coal, carries out two step desulfurization, is conducive to producing the low-sulfur metal iron powder of high-quality.
In some embodiments of the invention, the time that described reduction roasting processes is 20-40 minute.Thus at reduction roasting
The time of reason is within 20-40 minute, to be conducive to generation fe and two step desulphurization reactions fully to carry out, and generates the low-sulfur gold of high-quality
Belong to iron powder.
In some embodiments of the invention, the mean diameter of described broken pelletizing is not more than 2 millimeters.Thus by broken pelletizing
Mean diameter controls to be conducive to being fully contacted between ferric oxide particles and reduction coal below 2 millimeters, and then promotes ferrum oxide
And reduction reaction is fully carried out between reduction coal.
According to a further aspect in the invention, the present invention proposes a kind of system processing metallurgical slag, before described system is adapted for carrying out
The method processing metallurgical slag described in face, described system includes:
First mixing arrangement, described first mixing arrangement has metallurgical slag entrance, limestone entrance, binding agent entrance and first
Mixed material exports；
First shaped device, described first shaped device has the first compound entrance and the first material pelletizing exports, and described first
Compound entrance is connected with described first compound outlet；
Oxidizing roasting device, described oxidizing roasting device has the first material pelletizing entrance, the first exhanst gas outlet and oxidizing roasting
Product exit, described first material pelletizing entrance is connected with described first material pelletizing outlet；
Breaker, described breaker is connected with described first oxidizing roasting product exit；
Second mixing arrangement, described second mixing arrangement has oxidizing roasting product inlet, reduction coal entrance, binding agent entrance
With the second compound outlet, described oxidizing roasting product inlet is connected with described breaker；
Second shaped device, described second shaped device has the second compound entrance and an outlet of the second material pelletizing, and described the
Two compound entrances and the outlet of the second compound are connected；
Reduction roasting device, described reduction roasting device has the second material pelletizing entrance, the second exhanst gas outlet, reduction roasting
Product exit, described second material pelletizing entrance is connected with described second material pelletizing outlet；And
Mill ore magnetic selection device, described mill ore magnetic selection device has reduction roasting product inlet, metal iron powder outlet and tailings outlet,
Described reduction roasting product inlet is connected with described reduction roasting product exit.
In some embodiments of the invention, described first shaped device and described second shaped device are balling disk (-sc).
In some embodiments of the invention, described oxidizing roasting device is the rotary hearth furnace with oxidizing atmosphere.
Optionally, described reduction roasting device is the rotary hearth furnace with reducing atmosphere.
Accompanying drawing explanation
Fig. 1 is the flow chart of the method processing metallurgical slag according to an embodiment of the invention.
Fig. 2 is the structural representation of the system processing metallurgical slag 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 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.
According to an aspect of the present invention, the present invention proposes a kind of method processing metallurgical slag.Retouch below with reference to Fig. 1
State the method processing metallurgical slag of the specific embodiment of the invention.
The method processing metallurgical slag according to the specific embodiment of the invention includes: by described metallurgical slag and limestone and binding agent
Carry out the first forming processes, in order to obtain the first material pelletizing；Described first material pelletizing is carried out oxidizing roasting process, with
Just make the fayalite in described metallurgical slag transfer ferrum oxide to, remove sulfur simultaneously, and obtain oxidizing roasting product；By described oxygen
Change product of roasting and carry out break process, in order to obtain the oxidizing roasting product crushed；By described broken oxidizing roasting product with
Reduction coal, binding agent and water carry out the second forming processes, in order to obtain the second material pelletizing；Described second material pelletizing is entered
Row reduction roasting processes, in order to makes the ferrum oxide in described second material pelletizing be converted into ferrum, removes sulfur simultaneously, and gone back
Former product of roasting；And described reduction roasting product is carried out mill ore magnetic selection process, in order to obtain metal iron powder and tailings.
The method first passes through oxidizing roasting and destroys fayalite structure, generates the ferrum oxide of easily reduction, makes ferrum oxide in roasting
Particle aggregation, provides advantage for subsequent reactions, the sulfur that removing metallurgical slag is brought into the most effectively；Further
The sulfur brought into by the ferrum oxide reduction reduction coal of second time removing simultaneously by reduction roasting, uses pulverizing grinder to select mode by metallurgical slag
Middle ferrum element is effectively separated, and obtains the low-sulfur metal iron powder of high-quality.Thus use and this method solve ferrum in metallurgical slag
The problem of olivine difficulty reduction and ferrum element are difficult to the difficult problem assembled, and the method using two step desulfurization, respectively in oxidizing roasting
The element sulphur that stage and reduction roasting stage removing metallurgical slag and reduction coal bring into, and then obtain high-quality low-sulfur richness ferrous metal ferrum
Powder, the recycling that improve metallurgical slag is worth.
According to a particular embodiment of the invention, by above-mentioned metallurgical slag and limestone and binding agent according to 70-90:10-20:5-10
Mass ratio carries out described first forming processes.Thus, it is possible to the removal efficiency of sulfur in raising metallurgical slag, improve the place of oxidizing roasting
Reason efficiency.
According to a particular embodiment of the invention, the mean diameter of above-mentioned broken pelletizing is not more than 2 millimeters.Thus by broken pelletizing
Mean diameter controls to be conducive to being fully contacted between ferric oxide particles and reduction coal below 2 millimeters, and then promotes ferrum oxide
And reduction reaction is fully carried out between reduction coal.Inventor finds that the particle diameter of broken pelletizing is excessive, in these process conditions not
It is easy to reduction reaction fully carry out, and then needs higher temperature or longer response time to complete this reduction reaction, too much
Consume a large amount of energy consumption, increase production cost；Inventor finds that the particle diameter of broken pelletizing is not more than 2 millimeters, can guarantee that also
Former reaction is fully carried out, it is not necessary to too much increase production technology or production cost.
According to a particular embodiment of the invention, by above-mentioned broken pelletizing and reduction coal, binding agent according to 55-80:15-40:5-10
Mass ratio carries out described second forming processes.Thus, it is possible to significantly improve the treatment effeciency of reduction roasting.
According to a particular embodiment of the invention, in above-mentioned second molding process, the addition of described water is described cracker
The 5-10% of the gross mass of group, reduction coal and binding agent.In described second molding process, thus add water be conducive to oxygen
Change roasting process is reacted by the calcium oxide of decomposition of limestone and produce calcium hydroxide, and then beneficially calcium hydroxide and reduction ribbing
The reaction of Salmon-Saxl entered, carries out two step desulfurization, the sulfur that removing reduction coal is brought into, it is simple to produce the low-sulfur metal iron powder of high-quality.
According to a further aspect in the invention, the present invention proposes a kind of system processing metallurgical slag, before described system is adapted for carrying out
The method processing metallurgical slag described in face.According to a particular embodiment of the invention, present invention tool is described in detail below with reference to Fig. 2
The system processing metallurgical slag of body embodiment.
The system processing metallurgical slag according to the specific embodiment of the invention includes: first mixing arrangement the 10, first shaped device 20,
Oxidizing roasting device 30, breaker the 40, second mixing arrangement the 50, second shaped device 60, reduction roasting device 70 and
Mill ore magnetic selection device 80.
Wherein, the first mixing arrangement 10 has metallurgical slag entrance 11, limestone entrance 12, binding agent entrance 13 and first and mixes
Close material outlet 14；
First shaped device 20 has the first compound entrance 21 and the first material pelletizing outlet 22, described first compound entrance
21 are connected with described first compound outlet 14；
Described oxidizing roasting device 30 has first material pelletizing entrance the 31, first exhanst gas outlet 32 and oxidizing roasting product goes out
Mouth 33, described first material pelletizing entrance 31 is connected with described first material pelletizing outlet 14；
Described breaker 40 is connected with described first oxidizing roasting product exit 33；
Described second mixing arrangement 50 has oxidizing roasting product inlet 51, reduction coal entrance 52, binding agent entrance 53 and
Two compound outlets 54, described oxidizing roasting product inlet 51 is connected with described breaker 40；
Described second shaped device 60 has the second compound entrance 61 and the second material pelletizing outlet 62, described second mixing
Material entrance 61 is connected with the second compound outlet 54；
Described reduction roasting device 70 has second material pelletizing entrance the 71, second exhanst gas outlet 72, reduction roasting product goes out
Mouth 73, described second material pelletizing entrance 71 is connected with described second material pelletizing outlet 62；And
Described mill ore magnetic selection device 80 has reduction roasting product inlet 81, metal iron powder outlet 82 and tailings outlet 83, institute
State reduction roasting product inlet 81 to be connected with described reduction roasting product exit 73.
This system first passes through oxidizing roasting device and destroys fayalite structure, generates the ferrum oxide of easily reduction, makes oxygen in roasting
Change ferrum particle aggregation, provide advantage for subsequent reactions, the sulfur that removing metallurgical slag is brought into the most effectively；Enter one
The sulfur that the ferrum oxide reduction reduction coal of second time removing simultaneously is brought into by step ground by reduction roasting device, uses pulverizing grinder to select mode
Ferrum element in metallurgical slag is effectively separated, obtains the low-sulfur metal iron powder of high-quality.Thus use and system solves the problem smelting
In gold slag, problem and the ferrum element of the reduction of fayalite difficulty are difficult to the difficult problem assembled, the method using two step desulfurization, exist respectively
The element sulphur that oxidizing roasting stage and reduction roasting stage removing metallurgical slag and reduction coal bring into, and then it is rich to obtain high-grade low-sulfur
Ferrous metal iron powder, the recycling that improve metallurgical slag is worth.
According to a particular embodiment of the invention, described first shaped device 20 and described second shaped device 60 are balling disk (-sc).
Thus can improve balling efficiency further.
According to a particular embodiment of the invention, described oxidizing roasting device 30 is the rotary hearth furnace with oxidizing atmosphere.According to this
Bright specific embodiment, the temperature that the oxidizing roasting carried out in above-mentioned oxidizing roasting device 30 processes is 700-950 degree Celsius.
Thus under this oxidizing temperature, in metallurgical slag, fayalite is destructurized, produces the ferrum oxide being prone to reduction, ferrum in roasting
Grain is assembled, and provides advantage for subsequent reactions.Meanwhile, limestone reacts with the sulfur in metallurgical slag, carries out a step and takes off
Sulfur, alleviates the desulfurization load of subsequent process.
According to a particular embodiment of the invention, the time that the oxidizing roasting carried out in above-mentioned oxidizing roasting device 30 processes is 20-50
Minute.The time that thus oxidizing roasting processes is to complete fayalite oxidation reaction in metallurgical slag, Jin Ersheng in 20-50 minute
Become the ferric oxide particles that ferrum is assembled.Meanwhile, the oxidizing roasting time is within 20-50 minute, to be conducive to limestone and the sulfur in metallurgical slag
React, the sulfur in one-step removal metallurgical slag, alleviate the desulfurization load of subsequent process.
According to a particular embodiment of the invention, described reduction roasting device 70 is the rotary hearth furnace with reducing atmosphere.According to this
Bright specific embodiment, the temperature that the reduction roasting carried out in above-mentioned reduction roasting device 70 processes is 1100-1300 degree Celsius.
The ferrum oxide thus oxidizing roasting obtained under this reduction temperature reacts production ferrum simple substance further with reduction coal, passes through simultaneously
The reaction of Salmon-Saxl that calcium hydroxide and reduction coal are brought into, carries out two step desulfurization, is conducive to producing the low-sulfur metal iron powder of high-quality.
According to a particular embodiment of the invention, the time that the reduction roasting carried out in above-mentioned reduction roasting device 70 processes is 20-40
Minute.The time that thus reduction roasting processes is within 20-40 minute, to be conducive to fully reacting generation between ferrum oxide and reduction coal
Fe, ensure that two step desulphurization reactions between calcium hydroxide and reduction coal simultaneously, generates the low-sulfur metal iron powder of high-quality.
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
Certain smelts copper ashes, and its composition is: TFe 41.52%, Cu 0.36%, S 0.35%.Reduction coal fixed carbon 72%, S 0.32%.
In copper ashes: limestone: the ratio of binding agent=100:18:10 mixes, mixed material carries out pelletizing process.Pelletizing dries
Oxidizing roasting, sintering temperature 850 DEG C, roasting time 25 minutes is carried out after Gan.Pelletizing S content 0.02% after roasting.By ball
Group is crushed to below-2mm, in copper ashes after roasting: reduction coal: binding agent: the ratio of water=100:25:5:10 is mixed
Combined pressure ball, pelletizing carries out reduction roasting, sintering temperature 1200 DEG C, roasting time 40 minutes after drying.Pelletizing after roasting
Carry out mill ore magnetic selection after water quenching cooling, finally give the metal iron powder of TFe92.89%, S content 0.021% in iron powder.
Embodiment 2
Certain smelts copper ashes, and its composition is: TFe 41.52%, Cu 0.36%, S 0.35%.Reduction coal fixed carbon 72%, S 0.32%.
In copper ashes: limestone: the ratio of binding agent=100:15:10 mixes, mixed material carries out pelletizing process.Pelletizing dries
Oxidizing roasting, sintering temperature 850 DEG C, roasting time 25 minutes is carried out after Gan.Pelletizing S content 0.027% after roasting.By ball
Group is crushed to below-2mm, in copper ashes after roasting: reduction coal: binding agent: the ratio of water=100:25:5:10 is mixed
Combined pressure ball, pelletizing carries out reduction roasting, sintering temperature 1200 DEG C, roasting time 40 minutes after drying.Pelletizing after roasting
Carry out mill ore magnetic selection after water quenching cooling, finally give the metal iron powder of TFe92.03%, S content 0.030% in iron powder.
Embodiment 3
Certain smelts copper ashes, and its composition is: TFe 41.52%, Cu 0.36%, S 0.35%.Reduction coal fixed carbon 72%, S 0.32%.
In copper ashes: limestone: the ratio of binding agent=100:15:10 mixes, mixed material carries out pelletizing process.Pelletizing dries
Oxidizing roasting, sintering temperature 900 DEG C, roasting time 20 minutes is carried out after Gan.Pelletizing S content 0.022% after roasting.By ball
Group is crushed to below-2mm, in copper ashes after roasting: reduction coal: binding agent: the ratio of water=100:25:5:10 is mixed
Combined pressure ball, pelletizing carries out reduction roasting, sintering temperature 1300 DEG C, roasting time 25 minutes after drying.Pelletizing after roasting
Carry out mill ore magnetic selection after water quenching cooling, finally give the metal iron powder of TFe93.14%, S content 0.021% in iron powder.
Embodiment 4
Certain smelts nickel slag, and its composition is: TFe 43.22%, S 0.95%.Reduction coal fixed carbon 72%, S 0.32%.By nickel
Slag: limestone: the ratio of binding agent=100:18:10 mixes, mixed material carries out pelletizing process.After pelletizing is dried
Carry out oxidizing roasting, sintering temperature 900 DEG C, roasting time 20 minutes.Pelletizing S content 0.035% after roasting.Pelletizing is broken
It is broken to below-2mm, in copper ashes after roasting: reduction coal: binding agent: the ratio of water=100:30:5:10 carries out mixing pressure
Ball, pelletizing carries out reduction roasting, sintering temperature 1300 DEG C, roasting time 25 minutes after drying.Pelletizing shrend after roasting
Carry out mill ore magnetic selection after cooling, finally give the metal iron powder of TFe93.55%, S content 0.029% in iron powder.
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.
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 be expressed or hidden
One or more this feature are included containing ground.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 ", 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.For the ordinary skill in the art, can be according to tool
Body situation 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 can be
First and second features directly contact, or the first and second features are by intermediary mediate contact.And, first is special
Levy second feature " on ", " top " and " above " but fisrt feature directly over second feature or oblique upper, or only
Only represent that fisrt feature 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 be merely representative of fisrt feature level height less than second
Feature.
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, need not pin to the schematic representation of above-mentioned term
To be identical embodiment or example.And, the specific features of description, structure, material or feature can be at any one
Or multiple embodiment or example combine in an appropriate manner.Additionally, in the case of the most conflicting, the technology of this area
Personnel the feature of the different embodiments described in this specification or example and different embodiment or example can be combined 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 method processing metallurgical slag, it is characterised in that including:
Described metallurgical slag is carried out the first forming processes with limestone and binding agent, in order to obtain the first material pelletizing；
Described first material pelletizing is carried out oxidizing roasting process, in order to make the fayalite in described metallurgical slag transfer ferrum oxide to,
Remove sulfur simultaneously, and obtain oxidizing roasting product；
Described oxidizing roasting product is carried out break process, in order to obtain the oxidizing roasting product crushed；
Described broken oxidizing roasting product is carried out the second forming processes with reduction coal, binding agent and water, in order to obtain second
Material pelletizing；
Described second material pelletizing is carried out reduction roasting process, in order to make the ferrum oxide in described second material pelletizing be converted into
Ferrum, removes sulfur simultaneously, and obtains reduction roasting product；And
Described reduction roasting product is carried out mill ore magnetic selection process, in order to obtain metal iron powder and tailings.
The method of process metallurgical slag the most according to claim 1, it is characterised in that by described metallurgical slag and limestone and
Binding agent carries out described first forming processes according to 70-90:10-20:5-10 mass ratio.
The method of process metallurgical slag the most according to claim 1, it is characterised in that described broken oxidizing roasting is produced
Thing and reduction coal, binding agent carry out described second forming processes according to 55-80:15-40:5-10 mass ratio.
The method of process metallurgical slag the most according to claim 3, it is characterised in that in described second molding process,
The addition of described water is the 5-10% of the gross mass of described broken oxidizing roasting product, reduction coal and binding agent.
The method of process metallurgical slag the most according to claim 1, it is characterised in that the temperature that described oxidizing roasting processes
For 700-950 degree Celsius,
Optionally, the time that described oxidizing roasting processes is 20-50 minute.
The method of process metallurgical slag the most according to claim 1, it is characterised in that the temperature that described reduction roasting processes
For 1100-1300 degree Celsius,
Optionally, the time that described reduction roasting processes is 20-40 minute.
The method of process metallurgical slag the most according to claim 1, it is characterised in that the mean diameter of described broken pelletizing
It is not more than 2 millimeters.
8. the system processing metallurgical slag, it is characterised in that described system is adapted for carrying out described in any one of claim 1-7
Process metallurgical slag method, described system includes:
First mixing arrangement, described first mixing arrangement has metallurgical slag entrance, limestone entrance, binding agent entrance and first
Mixed material exports；
First shaped device, described first shaped device has the first compound entrance and the first material pelletizing exports, and described first
Compound entrance is connected with described first compound outlet；
Oxidizing roasting device, described oxidizing roasting device has the first material pelletizing entrance, the first exhanst gas outlet and oxidizing roasting
Product exit, described first material pelletizing entrance is connected with described first material pelletizing outlet；
Breaker, described breaker is connected with described first oxidizing roasting product exit；
Second mixing arrangement, described second mixing arrangement has oxidizing roasting product inlet, reduction coal entrance, binding agent entrance
With the second compound outlet, described oxidizing roasting product inlet is connected with described breaker；
Second shaped device, described second shaped device has the second compound entrance and an outlet of the second material pelletizing, and described the
Two compound entrances and the outlet of the second compound are connected；
Reduction roasting device, described reduction roasting device has the second material pelletizing entrance, the second exhanst gas outlet, reduction roasting
Product exit, described second material pelletizing entrance is connected with described second material pelletizing outlet；And
Mill ore magnetic selection device, described mill ore magnetic selection device has reduction roasting product inlet, metal iron powder outlet and tailings outlet,
Described reduction roasting product inlet is connected with described reduction roasting product exit.
System the most according to claim 8, it is characterised in that described first shaped device and described second shaped device
For balling disk (-sc).
System the most according to claim 9, it is characterised in that described oxidizing roasting device is to have oxidizing atmosphere
Rotary hearth furnace,
Optionally, described reduction roasting device is the rotary hearth furnace with reducing atmosphere.
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| CN107099657A (en) * | 2017-05-17 | 2017-08-29 | 江苏省冶金设计院有限公司 | Comprehensively utilize the system and method for Industrial Solid Waste |
| CN107326173A (en) * | 2017-07-13 | 2017-11-07 | 中南大学 | A kind of method of valuable metal in compound additive recovery copper ashes |
| CN107674972A (en) * | 2017-09-30 | 2018-02-09 | 江苏省冶金设计院有限公司 | Utilize the method for copper ashes production sponge iron |
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| CN110004261A (en) * | 2019-05-24 | 2019-07-12 | 建龙北满特殊钢有限责任公司 | The preparation process of FeO in a kind of metallurgical cinder |
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| CN107674972A (en) * | 2017-09-30 | 2018-02-09 | 江苏省冶金设计院有限公司 | Utilize the method for copper ashes production sponge iron |
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| CN110004261A (en) * | 2019-05-24 | 2019-07-12 | 建龙北满特殊钢有限责任公司 | The preparation process of FeO in a kind of metallurgical cinder |
| CN112813277A (en) * | 2020-12-28 | 2021-05-18 | 中南大学 | Method for separating and recovering valuable metals from copper smelting slag through chlorination roasting |
| CN113621819A (en) * | 2021-07-21 | 2021-11-09 | 广东邦普循环科技有限公司 | Method for extracting valuable metals from low nickel matte converter slag |
| CN113621819B (en) * | 2021-07-21 | 2022-11-15 | 广东邦普循环科技有限公司 | Method for extracting valuable metals from low-grade nickel matte converter slag |
| CN114934186A (en) * | 2022-06-27 | 2022-08-23 | 安徽理工大学 | Method for enriching nickel-cobalt metal in fayalite type furnace slag |
| CN115044768A (en) * | 2022-06-27 | 2022-09-13 | 安徽理工大学 | Method for increasing size of metallic iron particles in fayalite-type slag reduction product |
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