CN206139310U - System for be used for direct reduction iron content pelletizing to dissociate - Google Patents
System for be used for direct reduction iron content pelletizing to dissociate Download PDFInfo
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- CN206139310U CN206139310U CN201621085055.8U CN201621085055U CN206139310U CN 206139310 U CN206139310 U CN 206139310U CN 201621085055 U CN201621085055 U CN 201621085055U CN 206139310 U CN206139310 U CN 206139310U
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Abstract
The utility model discloses a system for be used for direct reduction iron content pelletizing to dissociate, including broken system and ore grinding grading system, wherein, ore grinding grading system includes primary grinding system, secondary grinding system and three -section ore grinding system, broken system, primary grinding system, secondary grinding system and three -section ore grinding system link together in order. The utility model discloses system for be used for direct reduction iron content pelletizing to dissociate designs scientific and reasonable, combines closely breakage and ore grinding on the one hand, can effectively save energy saving and consume, sparingly the pellet required cost that dissociates, on the other hand adopts three -section ore grinding grading system, has further improved grind grading efficiency, has guaranteed gained result epigranular, has met the requirements.
Description
Technical field
The invention belongs in non-ferrous metal metallurgical industry waste residue field of comprehensive utilization, and in particular to one kind for directly and also
The system of former iron content pelletizing dissociation.
Background technology
With the development of nonferrous metallurgy industry, nonferrous smelting waste residue obtains effective comprehensive reutilization, at present, directly also
Former roasting is to process one of nonferrous smelting waste residue and low-grade complex refractory iron ore most efficient method, the height that the technique is obtained
The reduced iron powder cold pressing block of degree of metalization can be used as the raw material for smelting high-quality steel, special steel.
According to the requirement of the mill ore magnetic selection technique of direct-reduction iron content pelletizing, final mog is typically all in -325 mesh
80%～90% is accounted for, magnetic separation process is traditionally arranged to be stage closed circuit grinding flow process, stage grinding magnetic dressing process.Nonferrous Metallurgical Waste Slag
Direct-reduction return iron process it is at the early-stage in China, ferrum is typically paid attention in the research of many research departments and factory to the technique
Degree of metalization, thermal regulation and control climate etc., fail for reduction after material characteristic, such as chemical composition, granularmetric composition
And the property such as the embedding cloth relation of mineral grain makes the adjustment of corresponding ore-dressing technique.Although there is correlational study institute to propose " autogenous grinding+ball
Mill+hard rock is crushed " (ABC patterns) or " autogenous grinding+ball milling " (AB patterns) flow processing metallurgical slag, but the original of this kind of mode treatment
Material is usually the slag of non-dilution, and is subsequently not required to reduction, only reclaims non-ferrous metal therein by physicochemical manner, because
This, larger particles hard rock can make full use of as self-mill medium in slag.But, for the pellet of direct-reduction, itself is not
Hard rock containing larger particles, is unsuitable for using ABC flow processs or AB flow processs.At present dissociation operation typically only adopts single mill
Meeting the purpose of Ore dissociation, the overall energy consumption of less consideration pellet dissociation lacks direct-reduction iron content pelletizing to miner's skill
The ore grinding characteristic research of ore deposit, it is too high to often result in ore grinding energy consumption, needs to combine broken and other ore grinding forms and system pair
Direct-reduction pelletizing is studied, to guarantee that dissociation is reached in the state of most energy-conservation to be required.
The content of the invention
Goal of the invention：Ore grinding energy consumption is too high in order to overcome prior art, the low problem of production capacity, the invention provides
A kind of system for being reduced directly the dissociation of iron content pelletizing.
Technical scheme：In order to achieve the above object, it is of the present invention it is a kind of for be reduced directly iron content pelletizing dissociation
System, including crushing system and grinding classification system, wherein, grinding classification system includes primary grinding system, secondary grinding system
System and three sections of grinding systems, the crushing system, primary grinding system, secondary grinding system and three sections of grinding systems are sequentially connected with
Together.
Preferably, the primary grinding system, secondary grinding system and three sections of grinding systems are closed circuit grinding system.
Preferably, the crushing system includes disintegrating apparatus, transmission equipment and storage equipment.
It is further preferred that the disintegrating apparatus is high-pressure roller mill.
The grinding classification system adopts three sections of ore grindings, including primary grinding system, secondary grinding system and three sections of ore grindings
System, wherein one section of ball mill and one section of Inspection graduation cyclone combination, two-stage nitration ball mill and the advance Inspection graduation eddy flow of two-stage nitration
Device is combined, and three sections of ball mill and advance Inspection graduation high frequency shale shaker are combined.Via product of the disintegrating apparatus after broken by passing
Equipment is sent to be transported to storage equipment, storage equipment is connected with primary grinding system, sequentially enters follow-up grinding classification system.
Preferably, the primary grinding system include one section of ball mill being sequentially connected, one section of classifying equipoment to ore deposit pump and
One section of classifying equipoment.
Preferably, the secondary grinding system includes that two-stage nitration ball mill, two-stage nitration classifying equipoment set to ore deposit pump and two-stage nitration classification
It is standby.
Preferably, one section of classifying equipoment and two-stage nitration classifying equipoment are hydrocyclone or spiral classifier.
It is further preferred that one section of classifying equipoment and two-stage nitration classifying equipoment are hydrocyclone.
Hydroclone classification effect is better than spiral classifier, and classification efficiency can bring up to 80%, can make ore grinding from 50%
Efficiency improves 25%, and power consumption reduces 20%, so as to improve grinding machine disposal ability.
Preferably, three sections of grinding systems include three sections of ball mill, high frequency fine screens to ore deposit pump and high frequency fine screen.
It is further preferred that one section of classifying equipoment includes two outlets, one is connected to be formed back with one section of ball mill
Road, is easy to sand return to regrind；Another is connected with two-stage nitration classifying equipoment to ore deposit pump, is easy to for overflow product to import secondary grinding system
System.
It is further preferred that the two-stage nitration classifying equipoment includes two outlets, one is connected to be formed back with two-stage nitration ball mill
Road, is easy to sand return to regrind；Another is connected with high frequency fine screen to ore deposit pump, is easy to for overflow product to import three sections of grinding systems.
It is further preferred that the high frequency fine screen includes two outlets, one is connected to form loop with three sections of ball mill, just
Regrind in sand return；Another is overflow product exit.
When the above-mentioned system for being reduced directly the dissociation of iron content pelletizing works, direct-reduction iron content pelletizing is first directed to crush
After equipment is broken, storage equipment is transported to by transmission equipment, is then introduced into one section of ball mill, through one section of ball mill ball milling it
Product afterwards imports one section of classifying equipoment and carries out Inspection graduation via one section of classifying equipoment to ore deposit pump, and undesirable product is returned
Sand returns one section of ball mill and regrinds；Satisfactory product overflow goes out, and is directly connected to two-stage nitration classifying equipoment and gives ore deposit pump, imports two-stage nitration point
Level equipment carries out Inspection graduation, and undesirable product imports two-stage nitration ball mill and regrinds；Satisfactory product overflow goes out, directly
High frequency fine screen being connect in succession and giving ore deposit pump, importing high frequency fine screen carries out Inspection graduation, and undesirable product imports three sections of ball mill
Regrind, satisfactory product overflow is discharged.
The overflow product design that above-mentioned flow process is mainly based upon one section of classifying equipoment Inspection graduation is typically relatively low, and only 40% is left
It is right, it is impossible to which that concentration is difficult directly to carry out grinding operation, and Jing after the classification of two-stage nitration classifying equipoment coarse grain sand setting concentration up to 60% with
On, then regrinded and be more relatively adapted to.
Because steel ball follows probability statistics rule to the broken of pellet in ball mill, with randomness, ball mill it is broken
Broken efficiency is only 6%～9%.Feed preparation unit size is thicker, and under identical product fineness, the ore grinding time is longer, the abrasion to grinding machine
Bigger, the productivity ratio of grinding machine is lower.Mineral processing in China factory mill feed size is larger, mostly -12mm, and foreign countries are typically in below 6mm.Number
Show according to data, by mill feed size by：20mm, 15mm, 12mm are reduced to 8mm, 5mm, below 3mm, so that it may reduce broken mill total energy
The 15%～30% of consumption.
So, the present invention first will for being reduced directly the system of iron content pelletizing dissociation for the material characteristic after reduction
Direct-reduction iron content pelletizing is crushed using disintegrating apparatus, i.e., before direct-reduction iron content pelletizing ore grinding, employ one section and open
Road crushes, and makes pelletizing be crushed to the fineness for being beneficial to ore grinding.On the one hand so that the energy for being consumed is less than by the way of ore grinding
Reach the energy that same granularity is consumed；On the other hand, first pellet carried out into one section of open circuit crushing, causes in pellet and be covered with
Crack, next in primary grinding, pelletizing fully dissociates along crack, is conducive to improving ball mill disposal ability, reduces broken mill total
The 15%～30% of energy consumption, this also complies with the theory of " much broken and lessmill ".
In addition, direct-reduction pellet allocates reduction coal into because of the front green-ball of reduction, in reduction process, reduction coal participates in anti-
Should, leave the ripe pellet of porous surface.But, in the higher Direct Reduction of temperature, pelletizing is internally formed more glass
The Binder Phase of glass phase, the ore grinding characteristic for causing ripe pellet different from primary ore presentation.Ripe pellet hardness is relatively general primary
Ore will height, fragility is larger, and ball milling is impacting and grind based on stripping effect, it is impossible to effectively reach grinding efficiency.
Combine closely broken with ore grinding in the present invention, it is direct as fine crushing device process especially with high-pressure roller mill
Reduction iron content pellet, can make harder pellet produce enough cracks, in follow-up mill immediately based on force-to-crush
In ore deposit, crack expands rapidly, and pellet volume is sharply increased, and subsequently switchs to the conventional ore grinding work based on specific surface area increase
Sequence, by classifying equipoment and dusting cover control classification the purpose of valuable mineral monomer dissociation is finally reached.
One of innovative point as the present invention, ball mill and classifying equipoment associated working, are directly enhancing classification efficiency
While, also improve the disposal ability of ball mill.Primary grinding system and secondary grinding system are carried by strengthening graded operation
High score stage efficiency, makes qualified ore particle depart from grind grading circulation as early as possible, reduces " unnecessary grinds "；Three sections of grinding systems are then
Closed circuit grinding is constituted using high frequency fine screen combination, account for 80%～90% or so, and one because three sections of ore grindings have typically reached -325 mesh,
Secondary grinding Chang Yuyi stages of magnetic separation is combined, and magnetic separation is thrown the treating capacity of three sections of grinding machines after tail and reduced, and is three sections of reinforcing grading effects, is adopted
Ore milling product is classified with high frequency fine screen, reduces ore grinding power consumption, three sections of grinding machine disposal abilities improve more than 50%.
Beneficial effect：The present invention is scientific and reasonable for the system design for being reduced directly the dissociation of iron content pelletizing, on the one hand will be broken
It is broken to combine closely with ore grinding, energy consumption can be effectively saved, save cost needed for pellet dissociation；On the other hand using three sections of ore grindings point
Level system, further increases broken classification efficiency, it is ensured that products therefrom epigranular, meet the requirements.
Description of the drawings
Fig. 1 is the process chart using the system dissociation direct-reduction iron content pelletizing of the present invention；
Fig. 2 is the present invention for being reduced directly the dissociation system schematic of iron content pelletizing.
Specific embodiment
The present invention is explained in detail with reference to specific embodiment.
Embodiment 1
As shown in figure 1, be the flow process using the system dissociation direct-reduction iron content pelletizing of the present invention, specially：First will
Direct-reduction ball ore deposit group is put into crushing system 1, and being introduced directly into primary grinding system 3 after broken carries out grind grading, accords with
The overflow for closing classification requirement enters secondary grinding system 4, and undesirable, sand return is returned primary grinding system 3 and regrinded；
The first Inspection graduation into after secondary grinding system 4, the overflow for meeting classification requirement enters three sections of section grinding systems 5, and not meeting will
That what is asked is then regrinded into secondary grinding system 4；First Inspection graduation, undesirable into after three sections of section grinding systems 5
Then regrinded into three sections of grinding systems 5, the product for meeting classification requirement is expelled directly out, until discharging all products up to standard
Thing.
Embodiment 2
Dissociation system for being reduced directly iron content pelletizing as shown in Figure 2, including crushing system 1 and grinding classification system
2, wherein, crushing system 1 includes disintegrating apparatus 11, transmission equipment 12 and storage equipment 13, and specifically, disintegrating apparatus 11 is high pressure
Roller mill, transmission equipment 12 are high inclination-angle sealing-tape machine, storage equipment 13 is fine ore bin；Grinding classification system 2 includes primary grinding
System 3, secondary grinding system 4 and three sections of grinding systems 5, above-mentioned crushing system 1, primary grinding system 3, secondary grinding system 4
Together with being sequentially connected with three sections of grinding systems 5.Specifically, primary grinding system 3 include be sequentially connected one section of ball mill 31,
One section of classifying equipoment is to ore deposit pump 32 and one section of classifying equipoment 33；Secondary grinding system 4 includes that the classification of two-stage nitration ball mill 41, two-stage nitration sets
It is standby to give ore deposit pump 42 and two-stage nitration classifying equipoment 43；Three sections of grinding systems 5 include three sections of ball mill 51, high frequency fine screen to ore deposit pump 52 and height
Frequency dusting cover 53.One section of classifying equipoment 33 and two-stage nitration classifying equipoment 43 are hydrocyclone.
Wherein, one section of classifying equipoment 33 includes two outlets, and one is overflow outlet, is directly connected to secondary grinding system 4
Two-stage nitration classifying equipoment to ore deposit pump 42；One is sand return outlet, and return is connected to form loop with one section of ball mill 31.Two-stage nitration is classified
Equipment 43 includes two outlets, and one is overflow outlet, is directly connected to the high frequency fine screen of three sections of grinding systems 5 to ore deposit pump 52；One
It is individual directly to be connected to form loop with two-stage nitration ball mill 41.High frequency fine screen 53 includes two outlets, and one is overflow outlet, directly arranges
Go out product up to standard；One directly is connected to form loop with three sections of ball mill 51.
When the above-mentioned dissociation system for being reduced directly iron content pelletizing works, direct-reduction iron content pelletizing initially enters broken
After equipment 11 is broken, storage equipment 13 is transported to by transmission equipment 12, one section of ball mill 31 is then introduced into, through one section of ball milling
Product after the ball milling of machine 31 imports one section of classifying equipoment 33 and carries out Inspection graduation via one section of classifying equipoment to ore deposit pump 32, is not inconsistent
Close desired one section of ball mill 31 of product sand return time to regrind；Satisfactory product overflow goes out, and is directly connected to two-stage nitration classifying equipoment
To ore deposit pump 42, importing two-stage nitration classifying equipoment 43 carries out Inspection graduation, and undesirable product is directly entered two-stage nitration ball mill 41
Regrind；Satisfactory product overflow goes out, and is directly connected to high frequency fine screen to ore deposit pump 52, imports high frequency fine screen 53 and carries out checking and divides
Level, undesirable product is directly entered three sections of ball mill 51 and regrinds, and satisfactory product overflow is discharged.
Claims (10)
1. it is a kind of for be reduced directly iron content pelletizing dissociation system, it is characterised in that including crushing system (1) and grind grading
System (2), wherein, grinding classification system (2) includes primary grinding system (3), secondary grinding system (4) and three sections of grinding systems
(5), the crushing system (1), primary grinding system (3), secondary grinding system (4) and three sections of grinding systems (5) are sequentially connected with
Together.
2. it is according to claim 1 for be reduced directly iron content pelletizing dissociation system, it is characterised in that it is described one section mill
Ore deposit system (3), secondary grinding system (4) and three sections of grinding systems (5) are closed circuit grinding system.
3. it is according to claim 1 for be reduced directly iron content pelletizing dissociation system, it is characterised in that the broken system
System (1) is including disintegrating apparatus (11), transmission equipment (12) and storage equipment (13).
4. the system for being reduced directly the dissociation of iron content pelletizing according to claim 3, it is characterised in that described broken to set
Standby (11) are high-pressure roller mill.
5. it is according to claim 1 for be reduced directly iron content pelletizing dissociation system, it is characterised in that it is described one section mill
Ore deposit system (3) is including the one section of ball mill (31), one section of classifying equipoment being sequentially connected to ore deposit pump (32) and one section of classifying equipoment
(33), wherein one section of classifying equipoment (33) is hydrocyclone.
6. the system for being reduced directly the dissociation of iron content pelletizing according to claim 1, it is characterised in that two-stage nitration mill
Ore deposit system (4) is including two-stage nitration ball mill (41), two-stage nitration classifying equipoment to ore deposit pump (42) and two-stage nitration classifying equipoment (43), wherein two-stage nitration
Classifying equipoment (43) is hydrocyclone.
7. it is according to claim 1 for be reduced directly iron content pelletizing dissociation system, it is characterised in that it is described three sections mill
Ore deposit system (5) is including three sections of ball mill (51), high frequency fine screen to ore deposit pump (52) and high frequency fine screen (53).
8. it is according to claim 5 for be reduced directly iron content pelletizing dissociation system, it is characterised in that described one section point
Level equipment (33) includes two outlets, and one is connected to form loop with one section of ball mill (31), is easy to sand return to regrind；Another with
Two-stage nitration classifying equipoment connects to ore deposit pump (42), is easy to for overflow product to import secondary grinding system (4).
9. the system for being reduced directly the dissociation of iron content pelletizing according to claim 6, it is characterised in that the two-stage nitration point
Level equipment (43) includes two outlets, and one is connected to form loop with two-stage nitration ball mill (41), is easy to sand return to regrind；Another with
High frequency fine screen connects to ore deposit pump (52), is easy to for overflow product to import three sections of grinding systems (5).
10. it is according to claim 7 for be reduced directly iron content pelletizing dissociation system, it is characterised in that the high frequency
Dusting cover (53) includes two outlets, and one is connected to form loop with three sections of ball mill (51), is easy to sand return to regrind；Another is excessive
Apoblema is exported.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621085055.8U CN206139310U (en) | 2016-09-27 | 2016-09-27 | System for be used for direct reduction iron content pelletizing to dissociate |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621085055.8U CN206139310U (en) | 2016-09-27 | 2016-09-27 | System for be used for direct reduction iron content pelletizing to dissociate |
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| Publication Number | Publication Date |
|---|---|
| CN206139310U true CN206139310U (en) | 2017-05-03 |
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| CN201621085055.8U Expired - Fee Related CN206139310U (en) | 2016-09-27 | 2016-09-27 | System for be used for direct reduction iron content pelletizing to dissociate |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114798133A (en) * | 2022-04-11 | 2022-07-29 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Method for improving production capacity of ore mill |
-
2016
- 2016-09-27 CN CN201621085055.8U patent/CN206139310U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114798133A (en) * | 2022-04-11 | 2022-07-29 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Method for improving production capacity of ore mill |
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| PP01 | Preservation of patent right | ||
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Effective date of registration: 20190102 Granted publication date: 20170503 |
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Date of cancellation: 20220102 Granted publication date: 20170503 |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170503 Termination date: 20180927 |