CN106435190A - Treatment method and system for metallized pellets - Google Patents
Treatment method and system for metallized pellets Download PDFInfo
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- CN106435190A CN106435190A CN201610788436.0A CN201610788436A CN106435190A CN 106435190 A CN106435190 A CN 106435190A CN 201610788436 A CN201610788436 A CN 201610788436A CN 106435190 A CN106435190 A CN 106435190A
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- grinding
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- filtrate
- solid
- mine tailing
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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
-
- 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
- C22B15/00—Obtaining copper
-
- 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
- C22B7/005—Separation by a physical processing technique only, e.g. by mechanical breaking
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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
- C22B7/006—Wet processes
- C22B7/008—Wet processes by an alkaline or ammoniacal leaching
-
- 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 a treatment method and system for metallized pellets. The invention firstly discloses the treatment method for the metallized pellets. The metallized pellets are subjected to water quenching and crushing, and then are grinded after copper-bearing waste liquor is added, so that grinded slurry is acquired; the grinded slurry is subjected to solid-liquid separation so that solid mixture and filtrate can be acquired; the solid mixture is subjected to magnetic selection so that metallic iron/iron alloy particles and primary tailings can be acquired, and the primary tailings are subjected to floatation so that sponge copper and secondary tailings can be acquired; and alkaline substances are added into the filtrate so that ferrous hydroxide can be acquired, and iron oxide red is acquired through calcination. The invention further discloses the system used for implementing the treatment method. The system comprises a metallized pellet water quenching-crushing device, a grinding device, a solid-liquid separation device, a magnetic selection device, a floatation separation device, a sediment separation device and a calcination device. According to the treatment method and system for the metallized pellets, the metallized pellets and the copper-bearing waste liquor can be synthetically utilized, and the high-quality iron products, sponge copper and iron oxide red are produced.
Description
Technical field
The present invention relates to a kind of processing method of metallized pellet, further relate to a kind of processing system of metallized pellet, belong to
In metallurgical technology field.
Background technology
Metallized pellet refers generally to the roasted product that ferrous material pelletizing obtains after direct-reduction, and wherein ferrum is mainly with gold
Presented in belonging to ferrum or ferroalloy (in ferroalloy, ferrum is existed) by metallic iron form, therefore its degree of metalization is typically up to 60%
～95%.At present, metallized pellet is many is processed using two ways, and a kind of mode is sent directly into for thermal state metal pellet
In smelting furnace, after separating, obtain molten point of ferrum/ferroalloy and melting slag through fusing；Another mode is metallized pellet first through water
Quench, crush, then after ore grinding, magnetic separation separation, obtain metallic iron/ferroalloy particles and mine tailing.Wherein, using fusing separate mode
When, energy consumption is higher, but can obtain high-grade and melt a point ferrum/ferroalloy；When being processed using ore grinding, magnetic separation mode, cost is relatively low, but
Grinding particle size because requiring is thin, and therefore the energy consumption of grinding process and water consume occupy larger proportion in production cost.
The generating source of contained waste liquid has a lot, common are printed circuit board (PCB), chemical industry saccharin sodium, plating processing and cathode copper
Deng manufacturing enterprise, contain the valuable elements such as a certain amount of copper in such waste liquid, and exist in the form of an ion, its discharge not only can be made
Become the wasting of resources, but also larger harm can be produced to human health and environment.At present the process of contained waste liquid and metal are returned
Packet receiving includes the side such as reverse osmosis membrane, Nanofiltering membrane, absorption method, electrolysis, neutralisation, the sedimentation method, ion exchange, ion exchange
Method.But from the aspect of processing cost, treatment scale, treatment effect etc., these methods cut both ways.
Chinese patent application publication No. CN 103956487A discloses one kind and prepares phosphoric acid using rotary hearth furnace metallized pellet
The method of ferrum lithium, metallized pellet is carried out crushing, grinding, magnetic separation, the multiple operation such as grinding and secondary magnetic separation are processed, then by ferrum
Based alloy is used, and technological process is longer；And this invention adopts metallized pellet grinding wet magnetic separation batch mixing
Drying and sintering technique, material priority is processed through high temperature low temperature high temperature and dry method Wet-dry method, and energy consumption is higher,
Thus high expensive；Obtained LiFePO4 is also possible to the impurity brought into because of ferrous alloy and affects its product quality.China
Public announcement of a patent application CN 101200320A discloses a kind of high-carbonaceous metallized pellet for processing waste water and preparation side
Method, prepares high-carbonaceous metallized pellet with carbonaceous material and iron-bearing material for raw material, and the method is only applicable to process electrolysis filter
Material, and need to be in acidic electrolyte bath aqueous solution, with carbon, ferrum as anode and cathode, using Fe2+With the reduction of carbon realize heavy metal and
The reduction of organic pollution is reclaimed, and therefore its treatment effect and production cost are all undesirable, and does not enable returning of valuable element
Receive, therefore economic benefit is poor.
It would therefore be highly desirable to develop a kind of processing method of new metallized pellet and system, realize metallized pellet and cupric
The comprehensive utilization of waste liquid, reduces production cost.
Content of the invention
First technical problem to be solved by this invention is to provide a kind of processing method of metallized pellet, the method energy
Enough output high-quality iron products, copper sponge and iron oxide red product, realize the comprehensive utilization of metallized pellet, contained waste liquid；
Another technical problem to be solved by this invention is to provide a kind of processing system of metallized pellet.
For solving above-mentioned technical problem, the technical solution used in the present invention is：
The present invention discloses a kind of processing method of metallized pellet first, comprises the following steps：(1) by metallized pellet
Carry out water quenching, break process, obtain broken material；(2) add contained waste liquid to carry out grinding in broken material, obtain grinding material
Slurry；(3) grinding slip is carried out solid-liquid separation, obtain solid mixture and filtrate；(4) solid mixture is carried out magnetic separation, obtain
To metallic iron/ferroalloy particles and a mine tailing；(5) mine tailing is carried out flotation, obtain copper sponge and secondary mine tailing；(6)
Add alkaline matter to be reacted in the filtrate of step (3), obtain ferrous hydroxide precipitation；(7) ferrous hydroxide is carried out
Calcining, obtains iron oxide red.
Wherein, by mass percentage, the degree of metalization of described metallized pellet is 60%-95% to step (1), preferably
80%-95%；Described metallized pellet is the product of roasting that ferrous material pelletizing obtains after direct-reduction, and metallized pellet
Middle ferrum is mainly existed with iron granule or ferroalloy particles form.Granularity≤the 1-3mm of the described broken material of step (1)；Excellent
Choosing, the described water quenching of step (1) is carried out using contained waste liquid.The concentration of copper ion in the described contained waste liquid of step (2) >=
0.3mg/L；The addition of described contained waste liquid is：Control the mol ratio of copper ion in metallic iron and contained waste liquid in broken material
≥10：1, preferably 10-1000：1.According to mass percent, fineness≤0.074mm in the described grinding slip of step (2)
Granule accounts for more than 70%.The concentration ＜ 0.1mg/L of copper ion in the described filtrate of step (3).The described alkaline matter of step (6) is made a living
Calx；Preferably, the addition of described quick lime is：Control calcium ion and step (3) filtrate ferrous ions in quick lime
Mol ratio is 1：1.
Contained waste liquid of the present invention is printed circuit board (PCB), chemical industry saccharin sodium, produce during plating processing or cathode copper etc.
The raw waste liquid containing copper ion is it is preferred that the concentration of wherein copper ion is in more than 0.3mg/L.
Metallized pellet after water quenching, crushing, is added contained waste liquid to carry out grinding by the present invention；In grinding process, contain
There is displacement reaction in copper waste liquid and metallic iron/ferroalloy particles, generate copper sponge, and with unreacted metallic iron/ferroalloy
Grain and impurity are all levigate, obtain grinding slip.Grinding slip is obtained solid mixture and filtrate after precipitation, solid mixes
Thing first obtains metallic iron/ferroalloy particles and a mine tailing through magnetic separation, and mine tailing obtains copper sponge and secondary again after flotation
Mine tailing；Again in filtrate add quick lime, reacted after obtain ferrous hydroxide precipitation, then through calcining be obtained iron oxide red.Its
In, grinding process not only can achieve that metallic iron/ferroalloy particles are separated with impurity moreover it is possible to promote metallic iron/ferroalloy particles
Contact with copper ion, the ancillary method such as need not stir, you can displacement reaction occurs；Simultaneously with the carrying out of displacement reaction, gold
The grindability belonging to ferrum/ferroalloy particles improves, and is conducive to improving grinding efficiency, and can make the content of ferrum in ferroalloy particles by
Gradually reduce, from obtained from the higher alloy product of grade；The addition of quick lime not only can provide hydroxyl for precipitation
Ion, also can reduce the water content in filtrate, reduce post precipitation, the energy consumption of calcination process.
The present invention is found by many experiments, and in contained waste liquid, copper ion concentration, in more than 0.3mg/L, is crushed by controlling
The ratio of material and contained waste liquid so that in broken material metallic iron and copper ion in contained waste liquid mol ratio >=10：1, excellent
Elect 10-1000 as：1 it can be ensured that the metallic iron in broken material can farthest displace copper ion so that subsequently giving up
Copper ion concentration in liquid is less than 0.1mg/L, reaches the environmental requirement of industrial wastewater discharge.The described quick lime of step (6) plus
Entering amount is：Calcium ion and the mol ratio of step (3) filtrate ferrous ions in quick lime is controlled to be 1：1, thus can make ferrous iron
Ion all precipitates, and can obtain more pure iron oxide red product after subsequent technique process.
The present invention further discloses a kind of system implementing described metallized pellet processing method, including：Metallization ball
Group's water quenching-breaker, grinding device, equipment for separating liquid from solid, magnetic separating device, floatation separator, precipitation separation device
And calciner plant.
Wherein, described metallized pellet water quenching-breaker is provided with metallized pellet entrance and broken material outlet；Described
Grinding device is provided with broken material entrance, contained waste liquid entrance and grinding slurry outlet；Described equipment for separating liquid from solid is provided with grinding
Slurry inlet, solid mixture outlet and filtrate (liquid；Described magnetic separating device be provided with solids mixture inlet, metallic iron/
Ferroalloy particles outlet and a mine tailing outlet；Described floatation separator is provided with mine tailing entrance, a copper sponge outlet and two
Secondary mine tailing outlet；Described precipitation separation device is provided with filtrate inlet, alkaline matter entrance, ferrous hydroxide outlet and supernatant and goes out
Mouthful；Described calciner plant is provided with ferrous hydroxide entrance and iron oxide red outlet.
It is further preferred that the broken material outlet of described metallized pellet water quenching-breaker and described grinding device
Broken material entrance be connected；The grinding slurry outlet of described grinding device and the grinding slurry inlet of described equipment for separating liquid from solid
It is connected；The solid mixture outlet of described equipment for separating liquid from solid is connected with the solids mixture inlet of described magnetic separating device；
Mine tailing outlet of described magnetic separating device is connected with a mine tailing entrance of described floatation separator；Described solid-liquid divides
Filtrate (liquid from device is connected with the filtrate inlet of described precipitation separation device；The ferrous hydroxide of described precipitation separation device
Outlet is connected with the ferrous hydroxide entrance of described calciner plant.Wherein, described grinding device can be ball mill.
" being connected " of the present invention can be fixedly connected or be detachably connected；Can be to be mechanically connected, also may be used
To be electrical connection；Can be to be directly connected to or be indirectly connected to by intermediary.
In the processing system of metallized pellet of the present invention, metallized pellet water quenching-breaker is used for metallized pellet
Carry out water quenching, break process, obtain broken material；Described grinding device is used for for broken material and contained waste liquid carrying out grinding,
Obtain grinding slip；Described equipment for separating liquid from solid is used for for grinding slip carrying out solid-liquid separation, obtains solid mixture and filtrate；
Described magnetic separating device is used for for solid mixture carrying out magnetic separation, obtains metallic iron/ferroalloy particles and a mine tailing；Described
Floatation separator is used for for a mine tailing carrying out flotation, obtains copper sponge and secondary mine tailing；Described precipitation separation device is used for
Filtrate is reacted with alkaline matter, is obtained ferrous hydroxide precipitation；Described calciner plant is used for carrying out ferrous hydroxide
Calcining, obtains iron oxide red.
Technical solution of the present invention compared with prior art, has the advantages that：
The processing method of metallized pellet of the present invention and system, are not changing metallized pellet existing main body handling process
Under the premise of, straight iron powder or iron filings are substituted with metallized pellet, by adding contained waste liquid in grinding process, and need not stir etc. auxiliary
Help measure, you can occur displacement reaction generate copper sponge, improve the grindability of metallized pellet, further reduce ore grinding water consume and
Energy consumption, significantly reduces the processing cost of metallized pellet and contained waste liquid, good in economic efficiency, and Cu in waste water ion after treatment
Concentration of emission can reach environmental requirement.The processing method of metallized pellet of the present invention and system, can output high-quality metallic iron/
Ferroalloy particles, iron oxide red and copper sponge are it is achieved that the comprehensive utilization of metallized pellet and contained waste liquid.
Brief description
Fig. 1 is the structural representation of the processing system of metallized pellet of the present invention；
Fig. 2 is the flow chart of the processing method of metallized pellet of the present invention.
Specific embodiment
To further describe the present invention with reference to specific embodiment, advantages of the present invention and feature will be with description and
Apparent.It should be understood that described embodiment is only exemplary, any restriction is not constituted to the scope of the present invention.This area
Technical staff should be understood that lower without departing from the spirit and scope of the present invention can to the details of technical solution of the present invention and
Form is modified or is replaced, but these modifications or replacement each fall within protection scope of the present invention.
As shown in figure 1, the invention provides a kind of processing system of metallized pellet, including：Metallized pellet water quenching-broken
Crushing device 1, grinding device 2, equipment for separating liquid from solid 3, magnetic separating device 4, floatation separator 5, precipitation separation device 6 and forge
Burn device 7.
Wherein, metallized pellet water quenching-breaker 1 is provided with metallized pellet entrance and broken material outlet；Grinding fills
Put 2 and be provided with broken material entrance, contained waste liquid entrance and grinding slurry outlet；Equipment for separating liquid from solid 3 be provided with grinding slurry inlet,
Solid mixture outlet and filtrate (liquid；Magnetic separating device 4 is provided with solids mixture inlet, metallic iron/ferroalloy particles go out
Mouth and a mine tailing outlet；Floatation separator 5 is provided with mine tailing entrance, a copper sponge and exports and the outlet of secondary mine tailing；Precipitation
Segregation apparatuss 6 are provided with filtrate inlet, alkaline matter entrance, ferrous hydroxide outlet and supernatant outlet；Calciner plant 7 is provided with hydrogen
Ferrous oxide entrance and iron oxide red outlet.
Further, the broken material outlet of metallized pellet water quenching-breaker 1 and the broken material of grinding device 2
Entrance is connected；The grinding slurry outlet of grinding device 2 is connected with the grinding slurry inlet of equipment for separating liquid from solid 3；Solid-liquid separation fills
Put 3 solid mixture outlet be connected with the solids mixture inlet of magnetic separating device 4；Tail of magnetic separating device 4
Ore deposit outlet is connected with a mine tailing entrance of floatation separator 5；The filtrate (liquid of equipment for separating liquid from solid 3 and precipitation separation device
6 filtrate inlet is connected；The ferrous hydroxide outlet of precipitation separation device 6 is connected with the ferrous hydroxide entrance of calciner plant 7.
" being connected " of the present invention can be fixedly connected or be detachably connected；Can be to be mechanically connected, also may be used
To be electrical connection；Can be to be directly connected to or be indirectly connected to by intermediary.
The processing system of metallized pellet of the present invention, the metal of metallized pellet metallized pelletizing water quenching-breaker 1
Pellet entrance enters metallized pellet water quenching-breaker 1, carries out water quenching, break process, obtains broken material.Broken thing
Material enters grinding device 2 by the broken material entrance of grinding device 2, and contained waste liquid enters grinding device through contained waste liquid entrance
2, broken material and contained waste liquid carry out grinding in grinding device 2, obtain grinding slip.Grinding slip is through equipment for separating liquid from solid
3 grinding slurry inlet enters equipment for separating liquid from solid 3, carries out solid-liquid separation, obtains solid mixture and filtrate.Solid mixture
Solids mixture inlet through magnetic separating device 4 enters magnetic separating device 4, solid mixture is carried out magnetic separation, obtains gold
Belong to ferrum/ferroalloy particles and a mine tailing.Mine tailing mine tailing entrance through floatation separator 5 enters FLOTATION SEPARATION dress
Put 5, a mine tailing is carried out flotation, obtain copper sponge and secondary mine tailing.Grinding slip obtains through equipment for separating liquid from solid 3 separation
The filtrate inlet through precipitation separation device 6 for the filtrate enters precipitation separation device 6, and quick lime enters precipitation point through alkaline matter entrance
From device 6, filtrate is reacted with alkaline matter quick lime, obtains ferrous hydroxide precipitation.Ferrous hydroxide precipitation is through calcining
The ferrous hydroxide entrance of device 7 enters calciner plant 7, is calcined, obtains iron oxide red.
Embodiment one
[1] will obtain closing rich in ferronickel after " lateritic nickel ore joins the direct-reduction of carbon pellets rotary hearth furnace " PROCESS FOR TREATMENT
Gold grain, degree of metalization are that 80% metallized pellet carries out water quenching, then will be water cooled after pelletizing be all crushed to 3mm with
Under, obtain broken material (process chart of metallized pellet is shown in Fig. 2)；
[2] broken material being crushed to below 3mm is sent into ball mill, and add the cupric that copper ion concentration is 10mg/L
Waste liquid carries out grinding so that the metallic iron in dilval granule is 10 with the mol ratio of copper ion in contained waste liquid：1, ore grinding
Time 40min, contained waste liquid gradually occurs displacement reaction to generate copper sponge with dilval granule, and closes with unreacted ferronickel
Gold grain, impurity etc. are all levigate to account for more than 70% to below 0.074mm, obtains grinding slip；
[3] grinding slip is carried out precipitate and separate, obtain solid mixture and filtrate, wherein solid mixture closes for ferronickel
Gold grain, copper sponge and mine tailing composition, filtrate is the solution containing ferrous ion, and in filtrate, the concentration of copper ion is less than 0.1mg/
L；
[4] solid mixture is carried out magnetic separation, obtain nickel grade be 9.34%, Iron grade be that 63.11% high ferronickel closes
Gold grain, and a mine tailing containing copper sponge；
[5] mine tailing is carried out flotation, obtain copper sponge and secondary mine tailing；
[6] add quick lime in filtrate, make iron ion generate hydroxide iron precipitate, then aoxidized after calcining
Iron oxide red product.
Embodiment two
[1] will obtain rich in low ferronickel after " nickel fibers slag joins the direct-reduction of carbon pellets rotary hearth furnace " PROCESS FOR TREATMENT
Alloying pellet, degree of metalization are that 85% metallized pellet carries out water quenching, then will be water cooled after pelletizing be all crushed to 2mm with
Under, obtain broken material；
[2] broken material being crushed to below 2mm is sent into ball mill, and add the cupric that copper ion concentration is 1g/L to give up
Liquid carries out grinding so that the metallic iron in low dilval is 100 with the mol ratio of copper ion in contained waste liquid：1, the ore grinding time
30min, contained waste liquid gradually with dilval granule occur displacement reaction generate copper sponge, and with unreacted dilval
Grain, impurity etc. are all levigate to account for more than 80% to below 0.074mm, obtains grinding slip；
[3] grinding slip is carried out precipitate and separate, obtain solid mixture and filtrate, wherein solid mixture closes for ferronickel
Gold grain, copper sponge and mine tailing composition, filtrate is the solution containing ferrous ion, and in filtrate, the concentration of copper ion is less than 0.1mg/
L；
[4] solid mixture is carried out magnetic separation, obtain TFe grade 90.81%, the dilval of nickel content 1.72%
Grain, and a mine tailing containing copper sponge；
[5] mine tailing is carried out flotation, obtain copper sponge and secondary mine tailing；
[6] add quick lime in filtrate, make iron ion generate hydroxide iron precipitate, then aoxidized after calcining
Iron oxide red product.
Embodiment three
[1] will obtain rich in metallic iron after " Iron concentrate joins the direct-reduction of carbon pellets rotary hearth furnace " PROCESS FOR TREATMENT
Grain, degree of metalization are that 90% metallized pellet carries out water quenching, then will be water cooled after pelletizing be all crushed to below 1mm, obtain
To broken material；
[2] broken material being crushed to below 1mm is sent into ball mill, and add the cupric that copper ion concentration is 10g/L
Waste liquid carries out grinding so that metallic iron is 10 with the mol ratio of copper ion in contained waste liquid：1, ore grinding time 25min, cupric gives up
Liquid gradually occurs displacement reaction to generate copper sponge with iron granule, and all grinds with unreacted iron granule, impurity etc.
Carefully account for more than 90% to below 0.074mm, obtain the slip after grinding；
[3] slip after grinding is carried out precipitate and separate, obtain solid mixture and filtrate, wherein solid mixture is gold
Belong to iron particle, copper sponge and mine tailing composition, filtrate is the solution containing ferrous ion, and in filtrate, the concentration of copper ion is less than
0.1mg/L；
[4] solid mixture is carried out magnetic separation, obtain the iron granule of TFe grade 91%, and containing copper sponge
Mine tailing；
[5] mine tailing is carried out flotation, obtain copper sponge and secondary mine tailing；
[6] add quick lime in filtrate, the addition of quick lime presses the mol ratio of calcium ion and ferrous ion by 1：1 adds
Enter, make iron ion generate hydroxide iron precipitate, then obtain iron oxide red product after calcining.
Example IV
[1] will obtain rich in metallic iron after " Iron concentrate joins the direct-reduction of carbon pellets rotary hearth furnace " PROCESS FOR TREATMENT
Grain, degree of metalization are that 95% metallized pellet carries out water quenching, then will be water cooled after pelletizing be all crushed to below 1mm, obtain
To broken material；
[2] broken material being crushed to below 1mm is sent into ball mill, and add copper ion concentration to be containing of 0.3mg/L
Copper waste liquid carries out grinding so that metallic iron is 1000 with the mol ratio of copper ion in contained waste liquid：1, ore grinding time 20min, contain
Copper waste liquid gradually occurs displacement reaction to generate copper sponge with iron granule, and complete with unreacted iron granule, impurity etc.
Portion is levigate to account for more than 95% to below 0.074mm, obtains the slip after grinding；
[3] slip after grinding is carried out precipitate and separate, obtain solid mixture and filtrate, wherein solid mixture is gold
Belong to iron particle, copper sponge and mine tailing composition, filtrate is the solution containing ferrous ion, and in filtrate, the concentration of copper ion is less than
0.1mg/L；
[4] solid mixture is carried out magnetic separation, obtain the iron granule of TFe grade 92%, and containing copper sponge
Mine tailing；
[5] mine tailing is carried out flotation, obtain copper sponge and secondary mine tailing；
[6] add quick lime in filtrate, the addition of quick lime presses the mol ratio of calcium ion and ferrous ion by 1：1 adds
Enter, make iron ion generate hydroxide iron precipitate, then obtain iron oxide red product after calcining.
Contrast test one
Will be after " lateritic nickel ore joins the direct-reduction of carbon pellets rotary hearth furnace " PROCESS FOR TREATMENT, obtaining degree of metalization is 80%
Thermal state metal pellet, after water quenching send into ball mill ore grinding, ore grinding time 50min, obtain fineness and account for for below 0.074mm
More than 70% grinding slip, grinding slip separates through magnetic separation, obtains nickel grade 6.03%, and the ferronickel of Iron grade 65.57% closes
Gold grain.
Contrast test two
Will be after " nickel fibers slag joins the direct-reduction of carbon pellets rotary hearth furnace " PROCESS FOR TREATMENT, obtaining degree of metalization is 85%
Thermal state metal pellet, after water quenching send into ball mill ore grinding, ore grinding time 40min, obtain fineness and account for for below 0.074mm
More than 70% grinding slip, grinding slip separates through magnetic separation, obtains the low ferronickel of nickel grade 0.89%, Iron grade 92.35%
Alloying pellet.
Contrast test three
Will be after " iron ore concentrate joins the direct-reduction of carbon pellets rotary hearth furnace " PROCESS FOR TREATMENT, obtaining degree of metalization is 90%
Thermal state metal pellet, sends into ball mill ore grinding, ore grinding time 30min after water quenching, obtains fineness and account for for below 0.074mm
More than 70% grinding slip, grinding slip separates through magnetic separation, obtains the iron granule of Iron grade 92.86%.
Claims (10)
1. a kind of processing method of metallized pellet is it is characterised in that comprise the following steps：
(1) metallized pellet is carried out water quenching, crushes, obtain broken material；
(2) add contained waste liquid to carry out grinding in broken material, obtain grinding slip；
(3) grinding slip is carried out solid-liquid separation, obtain solid mixture and filtrate；
(4) solid mixture is carried out magnetic separation, obtain metallic iron/ferroalloy particles and a mine tailing；
(5) mine tailing is carried out flotation, obtain copper sponge and secondary mine tailing；
(6) add alkaline matter to be reacted in the filtrate of step (3), obtain ferrous hydroxide precipitation；
(7) ferrous hydroxide is calcined, obtained iron oxide red.
2. according to the processing method described in claim 1 it is characterised in that：By mass percentage, the described metallization of step (1)
The degree of metalization of pelletizing is 60%-95%, preferably 80%-95%；
Wherein, described metallized pellet is the product of roasting that ferrous material pelletizing obtains after direct-reduction.
3. according to the processing method described in claim 1 it is characterised in that：In the described contained waste liquid of step (2), copper ion is dense
Degree >=0.3mg/L；
The addition of described contained waste liquid is：Control the mol ratio of copper ion in metallic iron and contained waste liquid in broken material >=
10：1, preferably 10-1000：1.
4. according to the processing method described in claim 1 it is characterised in that：According to mass percent, the described grinding of step (2)
In slip, the granule of fineness≤0.074mm accounts for more than 70%.
5. according to the processing method described in claim 1 it is characterised in that：The described alkaline matter of step (6) is quick lime；
Preferably, the addition of described quick lime is：Control rubbing of calcium ion and step (3) filtrate ferrous ions in quick lime
That ratio is 1：1.
6. according to the processing method described in claim 1 it is characterised in that：Granularity≤the 1- of the described broken material of step (1)
3mm；
Preferably, the described water quenching of step (1) is carried out using contained waste liquid；
The concentration ＜ 0.1mg/L of copper ion in the described filtrate of step (3).
7. a kind of system implementing processing method described in claim 1 to 6 any one is it is characterised in that include：Metallization ball
Group's water quenching-breaker, grinding device, equipment for separating liquid from solid, magnetic separating device, floatation separator, precipitation separation device
And calciner plant.
8. according to the system described in claim 7 it is characterised in that：Described metallized pellet water quenching-breaker is provided with metal
Pellet entrance and broken material outlet；
Described grinding device is provided with broken material entrance, contained waste liquid entrance and grinding slurry outlet；
Described equipment for separating liquid from solid is provided with grinding slurry inlet, solid mixture outlet and filtrate (liquid；
Described magnetic separating device is provided with solids mixture inlet, metallic iron/ferroalloy particles outlet and a mine tailing outlet；
Described floatation separator is provided with mine tailing entrance, a copper sponge and exports and the outlet of secondary mine tailing；
Described precipitation separation device is provided with filtrate inlet, alkaline matter entrance, ferrous hydroxide outlet and supernatant outlet；
Described calciner plant is provided with ferrous hydroxide entrance and iron oxide red outlet.
9. according to the system described in claim 8 it is characterised in that：The broken thing of described metallized pellet water quenching-breaker
Material outlet is connected with the broken material entrance of described grinding device；
The grinding slurry outlet of described grinding device is connected with the grinding slurry inlet of described equipment for separating liquid from solid；
The solid mixture outlet of described equipment for separating liquid from solid is connected with the solids mixture inlet of described magnetic separating device；
Mine tailing outlet of described magnetic separating device is connected with a mine tailing entrance of described floatation separator；
The filtrate (liquid of described equipment for separating liquid from solid is connected with the filtrate inlet of described precipitation separation device；
The ferrous hydroxide outlet of described precipitation separation device is connected with the ferrous hydroxide entrance of described calciner plant.
10. according to the system described in claim 7 it is characterised in that：Described grinding device is ball mill.
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