CN105214830A - Magnetic mineral stage division - Google Patents
Magnetic mineral stage division Download PDFInfo
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- CN105214830A CN105214830A CN201510758266.7A CN201510758266A CN105214830A CN 105214830 A CN105214830 A CN 105214830A CN 201510758266 A CN201510758266 A CN 201510758266A CN 105214830 A CN105214830 A CN 105214830A
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Abstract
The present invention relates to Mineral Classification technical field, disclose a kind of magnetic mineral stage division, described magnetic mineral stage division comprises: step one, gravity and/or centrifugal force just classification are carried out, to obtain coarse fraction mineral aggregate and the fine fraction mineral aggregate meeting particle diameter to the magnetic raw ore material that the grinding machine of upstream provides; Step 2, carries out Magnetic fractionation to described coarse fraction mineral aggregate, to obtain tail residues and magnetic-particle mineral aggregate; Step 3, the described grinding machine described magnetic-particle mineral aggregate being at least partially back to upstream grinds further.Like this, before coarse fraction mineral aggregate after magnetic raw ore material is just separated is back to grinding machine, can timely and effectively by the such as gangue mine tailing of the tail residues in coarse fraction mineral aggregate, and/or, the ilmenite mine tailing of gangue mine tailing and weak magnetic is dished out, and the particle mineral aggregate that makes only to be magnetic is back in grinding machine and grinds further, thus improves the grainding capacity of grinding machine significantly, and reduce the overground of required mineral such as ilmenite, increase the yield of ilmenite.
Description
Technical field
The present invention relates to Mineral Classification technical field, particularly, relate to a kind of magnetic mineral stage division
Background technology
At present, magnetic iron ore and vanadium titano-magnetite all adopt the flow process of ore grinding-classification to process, namely, useful magnetic iron ore or titanomagnetite and gangue is made to reach monomer dissociation by ore grinding, utilize the feed separation that classifying equipoment will reach monomer cleavage as far as possible subsequently, classification substandard product then returns in conventional grinding circuit and grinds.Current general single employing spiral classifier, cyclone or vibrating fine screen etc., also part run is had to adopt the said equipment to carry out combined classification machine, its principle mainly judges the monomer dissociation degree of valuable mineral with the physical dimension of ore grinding generation particle or proportion granularity, and carries out classification with this.
But magnetic iron ore and v-ti magnetite ore are magnetic iron ore or titanomagnetite selecting the mineral of iron stage main enrichment, single utilizes the physical dimension of particle or proportion granularity to judge that liberation degree of minerals then has the following disadvantages:
1) in physical dimension classification, gangue monomer thick in actual production can be stayed on the vibratory sieve of sieve physical dimension extension set together with thick magnetic iron ore monomer particle, and enters together subsequently in ore grinding circulation.
2) gravity classification such as cyclone, grader is in actual production, and the larger gangue courage body of particle size also all can be stayed in ore grinding circulation with than the great and magnetic iron ore monomer that particle size is larger.
Along with the increase of production time, a large amount of monomer gangues certainly will be caused to return into grinding machine, thus cause the wearing and tearing of grinding machine and the waste of the energy.In addition, useful monomer mineral return and micro-size fraction mineral content can be caused to increase into grinding machine, grain class distribution scope broadens simultaneously, be unfavorable for the recycling in useful ore deposit, such as, when ilmenite returns in grinding machine together with monomer gangue, energy consumption is not only caused to waste, also cause ilmenite overground, the ilmenite of recyclable grade is obviously reduced.
Summary of the invention
The object of this invention is to provide a kind of magnetic mineral stage division, before the coarse fraction mineral aggregate of this magnetic mineral stage division after magnetic raw ore material is just separated is back to grinding machine, can timely and effectively by the such as gangue mine tailing of the tail residues in coarse fraction mineral aggregate, and/or, the ilmenite mine tailing of gangue mine tailing and weak magnetic is dished out, the particle mineral aggregate that makes only to be magnetic is back in grinding machine and grinds further, thus improve the grainding capacity of grinding machine significantly, reduce the wastage, and reduce the overground of required mineral such as ilmenite, increase the yield of ilmenite.
To achieve these goals, the invention provides a kind of magnetic mineral stage division, described magnetic mineral stage division comprises:
Step one, carries out gravity and/or centrifugal force just classification, to obtain coarse fraction mineral aggregate and the fine fraction mineral aggregate meeting particle diameter to the magnetic raw ore material that the grinding machine of upstream provides;
Step 2, carries out Magnetic fractionation to described coarse fraction mineral aggregate, to obtain tail residues and magnetic-particle mineral aggregate;
Step 3, the described grinding machine described magnetic-particle mineral aggregate being at least partially back to upstream grinds further.
Pass through technique scheme, due to magnetic raw ore material carry out the just classification of gravity and/or centrifugal force after the coarse fraction mineral aggregate that obtains can further by Magnetic fractionation, so that tail residues is therefrom isolated, thus can make before this coarse fraction mineral aggregate is back to grinding machine, can timely and effectively by the such as gangue mine tailing of the tail residues in coarse fraction mineral aggregate, and/or, the ilmenite mine tailing of gangue mine tailing and weak magnetic is dished out, the particle mineral aggregate that makes only to be magnetic is back in grinding machine and grinds further to carry out next classification cycle, thus significantly reduce the tail residues entering grinding machine, improve the grainding capacity of grinding machine, reduce the loss of unit concentrate classification, and mineral such as ilmenite enters the overground of grinding machine again needed for reducing, add the yield of ilmenite.
Further, described magnetic-particle mineral aggregate and magnetic raw ore material are together sent in described grinding machine.
Further, described magnetic raw ore material comprises magnetic iron ore and/or v-ti magnetite mineral material.
Further, further, described tail residues is the gangue mine tailing dissociated with magnetic iron ore; And/or described tail residues is the ilmenite mine tailing of gangue mine tailing and the weak magnetic of dissociating with vanadium titano-magnetite.
Further, the ilmenite mine tailing of described weak magnetic enters into the ilmenite grinding machine ore grinding in downstream.
Further, the gravity of described magnetic raw ore material and/or centrifugal force just classification are undertaken by cyclone, spiral classifier and/or screening machine.
Further, the Magnetic fractionation of described coarse fraction mineral aggregate is undertaken by magnetic separator.
Further, described fine fraction mineral aggregate is transported to downstream and carries out magnetic sorting operation.
Further, after step one, described coarse fraction mineral aggregate was sized mixing process before carrying out Magnetic fractionation.
Other features and advantages of the present invention are described in detail in detailed description of the invention part subsequently.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and forms a part for description, is used from explanation the present invention, but is not construed as limiting the invention with detailed description of the invention one below.In the accompanying drawings:
Fig. 1 is the schematic diagram of the magnetic mineral stage division that the specific embodiment of the invention provides.
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.Should be understood that, detailed description of the invention described herein, only for instruction and explanation of the present invention, is not limited to the present invention.
As shown in Figure 1, magnetic mineral stage division of the present invention comprises:
Step one, gravity and/or centrifugal force just classification are carried out to the magnetic raw ore material that the grinding machine of upstream provides, to obtain coarse fraction mineral aggregate and the fine fraction mineral aggregate meeting particle diameter, this coarse fraction mineral aggregate can include the little particle of proportion Large stone, the particle that proportion Large stone is large and the large particle of light specific gravity particle diameter;
Step 2, carries out Magnetic fractionation to described coarse fraction mineral aggregate, to obtain tail residues and magnetic-particle mineral aggregate;
Step 3, the described grinding machine described magnetic-particle mineral aggregate being at least partially back to upstream grinds further.
Like this, by this technical scheme, due to magnetic raw ore material carry out the just classification of gravity and/or centrifugal force after the coarse fraction mineral aggregate that obtains can further by Magnetic fractionation, so that tail residues is therefrom isolated, thus can make before this coarse fraction mineral aggregate is back to grinding machine, can timely and effectively by the such as gangue mine tailing of the tail residues in coarse fraction mineral aggregate, and/or, the ilmenite mine tailing of gangue mine tailing and weak magnetic is dished out, the particle mineral aggregate that makes only to be magnetic is back in grinding machine and grinds further to carry out next classification cycle, thus significantly reduce the tail residues entering grinding machine, improve the grainding capacity of grinding machine, reduce the loss of unit concentrate classification, and mineral such as ilmenite enters the overground of grinding machine again needed for reducing, add the yield of ilmenite.
Further, after step one, described coarse fraction mineral aggregate was sized mixing process before carrying out Magnetic fractionation.Namely, between step one and step 2, the coarse fraction mineral aggregate that step one produces is sized mixing process, thus to meet in step 2 Magnetic fractionation equipment more well to the requirement entering mineral aggregate, the efficiency of raising Magnetic fractionation.
Certainly, in the Magnetic fractionation of the application, the magnetic field intensity for classification is important parameter, needs to test according to the material of actual classification, the coarsely graded tail residues of principal security has disposability economically, or balance needed for valuable mineral not overground.
Further, as shown in Figure 1, described magnetic-particle mineral aggregate and can together be sent in described grinding machine by magnetic raw ore material, like this, magnetic-particle mineral aggregate can collide magnetic raw ore material in the process of lapping of grinding machine, the percentage of damage of further raising magnetic raw ore material, thus can isolate more fine fraction mineral aggregate in gravity subsequently and/or centrifugal force just classification.
In addition, magnetic mineral stage division of the present invention is in the hierarchical application to magnetic iron ore particularly vanadium titano-magnetite, and can obtain significant beneficial effect, namely described magnetic raw ore material comprises magnetic iron ore and/or v-ti magnetite mineral material.
Like this, when magnetic raw ore material comprises magnetic iron ore, described tail residues is the gangue mine tailing dissociated with magnetic iron ore, this gangue mine tailing can be dished out as qualified mine tailing, and when magnetic raw ore material is for comprising vanadium titano-magnetite, described tail residues is then the ilmenite mine tailing of gangue mine tailing and the weak magnetic of dissociating with vanadium titano-magnetite, like this, coarse fraction mineral aggregate is before being back to grinding machine, timely and effectively the ilmenite mine tailing of magnetic weak in coarse fraction mineral aggregate can be dished out, the particle mineral aggregate that makes only to be magnetic is back in grinding machine and grinds further to carry out next classification cycle, thus minimizing ilmenite enters the overground of grinding machine again, add the yield of ilmenite.
Further, according to actual production demand, the ilmenite mine tailing of described weak magnetic can enter into the ilmenite grinding machine ore grinding in downstream, thus considerably improves utilization rate and the yield of ilmenite.
In addition, in the magnetic mineral stage division of the application, the gravity of described magnetic raw ore material and/or centrifugal force just classification can be undertaken by existing cyclone, spiral classifier and/or screening machine.And the gravity classification of cyclone, spiral classifier and/or screening machine can be existing classification technique, no longer describe in detail at this.
Further, in the magnetic mineral stage division of the application, the Magnetic fractionation of described coarse fraction mineral aggregate is undertaken by magnetic separator.As above, the magnetic field intensity of this magnetic separator is important parameter, and need to test according to the material of actual classification, the coarsely graded tail residues of principal security has disposability economically, or balance needed for valuable mineral not overground.
Certainly, in gravity classification, as described in Figure 1, described fine fraction mineral aggregate is transported to downstream and carries out magnetic sorting operation, thus considerably improves classification and the sorting production efficiency of magnetic mineral.
To sum up, such as, in a kind of application specifically, magnetic iron ore or v-ti magnetite green ore enter ball mill, ball mill by magnetic iron ore or v-ti magnetite is levigate dissociate to partial monosomy after, first enter spiral classifier or water conservancy cyclone, utilize gravity, centrifugal force to carry out elementary rough classification, overflow obtains the qualified final products of classification; Grader sand return or cyclone desilting then enter Magnetic fractionation operation, gangue in the non magnetic ore-magnetic iron ore of the thick monomer dissociation in grader sand return or cyclone desilting or the ilmenite in vanadium titano-magnetite and gangue etc. are mainly dished out by Magnetic fractionation operation from grind grading circulation, in Magnetic fractionation, magnetic-particle mineral aggregate returns ball mill according to demand at least partly and regrinds, and enters in grader sand return or cyclone and carry out classification after magnetic mineral and non magnetic ore dissociate again.Like this, whole work flow produces two kinds of materials: the mineral that the qualified fine fraction mineral aggregate-monomer of classification is useful and gangue mineral fully dissociate, and can enter next step magnetic concentration working; The tail residues that Magnetic fractionation is dished out, dishes out as qualified tailings or enters the detached job of next step non-(weak) magnetic mineral.
Below the preferred embodiment of the present invention is described in detail by reference to the accompanying drawings; but; the present invention is not limited to the detail in above-mentioned embodiment; within the scope of technical conceive of the present invention; can carry out multiple simple variant to technical scheme of the present invention, these simple variant all belong to protection scope of the present invention.
It should be noted that in addition, each the concrete technical characteristic described in above-mentioned detailed description of the invention, in reconcilable situation, can be combined by any suitable mode.In order to avoid unnecessary repetition, the present invention illustrates no longer separately to various possible combination.
In addition, also can be combined between various different embodiment of the present invention, as long as it is without prejudice to thought of the present invention, it should be considered as content disclosed in this invention equally.
Claims (9)
1. a magnetic mineral stage division, is characterized in that, described magnetic mineral stage division comprises:
Step one, carries out gravity and/or centrifugal force just classification, to obtain coarse fraction mineral aggregate and the fine fraction mineral aggregate meeting particle diameter to the magnetic raw ore material that the grinding machine of upstream provides;
Step 2, carries out Magnetic fractionation to described coarse fraction mineral aggregate, to obtain tail residues and magnetic-particle mineral aggregate;
Step 3, the described grinding machine described magnetic-particle mineral aggregate being at least partially back to upstream grinds further.
2. magnetic mineral stage division according to claim 1, is characterized in that, described magnetic-particle mineral aggregate and magnetic raw ore material are together sent in described grinding machine.
3. magnetic mineral stage division according to claim 1, is characterized in that, described magnetic raw ore material comprises magnetic iron ore and/or v-ti magnetite mineral material.
4. magnetic mineral stage division according to claim 3, is characterized in that, described tail residues is the gangue mine tailing dissociated with magnetic iron ore; And/or,
Described tail residues is the ilmenite mine tailing of gangue mine tailing and the weak magnetic of dissociating with vanadium titano-magnetite.
5. magnetic mineral stage division according to claim 4, is characterized in that, the ilmenite mine tailing of described weak magnetic enters into the ilmenite grinding machine ore grinding in downstream.
6. magnetic mineral stage division according to claim 1, is characterized in that, the gravity of described magnetic raw ore material and/or centrifugal force just classification are undertaken by cyclone, spiral classifier and/or screening machine.
7. the magnetic mineral stage division according to claim 1 or 6, is characterized in that, the Magnetic fractionation of described coarse fraction mineral aggregate is undertaken by magnetic separator.
8. magnetic mineral stage division according to claim 1, is characterized in that, described fine fraction mineral aggregate is transported to downstream and carries out magnetic sorting operation.
9. magnetic mineral stage division according to claim 1, is characterized in that, after step one, to size mixing process to described coarse fraction mineral aggregate before carrying out Magnetic fractionation.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105772211A (en) * | 2016-04-08 | 2016-07-20 | 中钢集团马鞍山矿山研究院有限公司 | Arrangement method of magnetite ore flash magnetic separation combined equipment |
| CN111701719A (en) * | 2020-06-10 | 2020-09-25 | 章文民 | Automatic ore dressing equipment for tungsten ore |
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| CN105772211A (en) * | 2016-04-08 | 2016-07-20 | 中钢集团马鞍山矿山研究院有限公司 | Arrangement method of magnetite ore flash magnetic separation combined equipment |
| CN111701719A (en) * | 2020-06-10 | 2020-09-25 | 章文民 | Automatic ore dressing equipment for tungsten ore |
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