CN102145315B - Multi-level desiliconizing and purifying method and device for high-purity fine iron powder - Google Patents
Multi-level desiliconizing and purifying method and device for high-purity fine iron powder Download PDFInfo
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- CN102145315B CN102145315B CN201110031489.5A CN201110031489A CN102145315B CN 102145315 B CN102145315 B CN 102145315B CN 201110031489 A CN201110031489 A CN 201110031489A CN 102145315 B CN102145315 B CN 102145315B
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Abstract
The invention relates to a multi-level desiliconizing and purifying method and device for high-purity fine iron powder, and solves the problems of low separation efficiency and low grade of iron ore concentrates as silicon-containing ore particles are mixed in the magnetite separation process of magnetite. The magnetite feed is divided into multiple layers of bipolar alternating magnetic fields from top to bottom; mineral particles are subjected to multi-level separation repeatedly in the processes of magnetization, loosening, reverse magnetization, re-loosening and the like so that the size of magnetic flocs or flux linkage formed by mineral particles containing relatively high-quality iron is increased, and the low-quality mineral particles in a disperse state are separated by a screen and a flat alternate composite screen; and thus, a multi-selection effect is realized in primary separation operation, and the magnetite separation precision and concentrate grade can be obviously improved.
Description
Technical field
The present invention is applicable to be mingled with in fine powder of magnetite the sorting equipment for purifying of the impurity such as silicon, titanium, fluorine, sulphur, phosphorus, specifically relates to the multistage desiliconization method of purification of a kind of high purity iron fine powder and device.
Background technology
The selected magnetic selection method having adopted of magnetic iron ore divides two classes by magnetic field intensity at present: a class is conventional tubular magnetic separator, and magnetic field intensity is high, and iron recovery is high, but impurity is mingled with seriously; Another kind of is picking equipment under low magnetic field condition, as the magnetic agglomeration gravity separator of permanent magnetic field type, the column magnetic separator refiner of electromagnetism field type, wash mill, and the Magnetic field screening separator under uniform magnetic field, first two has formed magnetic aggressiveness after magnetic iron ore mineral being reunited by irregular magnetic flocculation, formed different differential settlements from the impurity particle that is dispersity existence, recycling ascending water is gone out impurity, but to being difficult to sorting compared with coarse grain impurity, and water consumption is larger; A kind of is afterwards in the uniform magnetic field relatively forming at the two poles of the earth, magnetic iron ore is magnetized into chain magnetic aggressiveness, and edge wherein sieve screens out the impurity of failing to reunite, to iron mineral not loose effect once again after reuniting, also can exist to some extent and be mingled with, affect the raising of iron concentrate grade.
Summary of the invention
The deficiency existing for overcoming prior art, the invention provides the multistage desiliconization method of purification of a kind of high purity iron fine powder and device.
Technical scheme: the multistage desiliconization method of purification of a kind of high purity iron fine powder, in minute constituency, iron fine powder at least will be carried out once following normal magnetization-loose-reverse magnetization-loose two-stage assorting room:
(1) with forward magnetic field, will be selected in Magnetic Materials and be magnetized into chain magnetic aggressiveness, and with screen pack, unmagnetized dispersion impurity be screened out, magnetic aggressiveness is descending along screen pack;
(2) between forward magnetic field and opposing magnetic field, magnetic aggressiveness is loose opening gradually, and screen pack is become to flat board, and loose Magnetic Materials is descending along flat board;
(3) with opposing magnetic field, remagnetize after the Magnetic Materials upset after loose is become to chain magnetic aggressiveness, and with screen pack, unmagnetized dispersion impurity is screened out.
Except above secondary magnetic separation process, can also carry out normal magnetization-loose-reverse magnetization-loose-forward magnetization-three grades of loose assorting rooms, and multipass sort process.
Before entering sorting, selected Magnetic Materials is ground.
Described magnetic field intensity is 10～1000 Gausses.
The multistage desiliconization purifying plant of a kind of high purity iron fine powder, comprise that cross section is the separation tube of rectangle, composite alternating magnetic field and composite screen mesh, the both sides of described separation tube inwall from top to bottom successively fixed magnets form and to be at least forward and reverse composite alternating magnetic field, described composite screen mesh tilts to be arranged in separation tube, the downside of this composite screen mesh is compound slab, it is web plate in magnetic field, the flat board of the section of having a common boundary in magnetic field, composite screen mesh upper end is provided with charging aperture, lower end is provided with iron fine powder discharging opening, and separation tube lower end is provided with discharging opening and auto-adjustment control valve.
Described composite alternating magnetic field is the composite permanet magnet alternating magnetic field that the little magnetic patch of a plurality of same magnetic is combined to form, or composite electromagnetic alternating magnetic field.
The magnetic block that adds that is also provided with same magnetic in magnetic field forms descending magnetic force.
Described composite screen mesh is prismatic structures, comprises the baffle plate of compound slab, both sides screen cloth and opposite side.
The mounted angle of described composite screen mesh is 75 °～85 °.
In separation tube, be at least fixed with a composite screen mesh, according to ore dressing treating capacity needs, composite screen mesh can endlessly superpose.
Beneficial effect of the present invention: sorting chamber internal magnetic field for both sides magnetic pole heteropole longitudinally alternately relatively, placement composite screen mesh wherein replaces the weak section in magnetic field, corresponding region, line of demarcation for dull and stereotyped at every group of magnetic pole, and in again falling between next reverse pole region after ore particle dispersion in this interval, reversion is reunited again; In the descending process of composite screen mesh that magnetic aggressiveness replaces with flat board along screen cloth, the interval screen size of screen cloth is less but larger than selected material middling particle size than the magnetic aggressiveness on sieve, and form same plane with dull and stereotyped interval, can allow magnetic aggressiveness along steadily descending on composite screen mesh, on composite screen mesh, obtain concentrate, low-grade intergrowth and matter are assorted to be removed after separated from composite screen mesh; The processes such as such can repeated multiple timesly magnetize-loose-reverse magnetization of a separation operation-loose, form multipass sort, and iron fine powder has been reached to refining effect fully.
The magnetic block that adds that is provided with same magnetic in resultant field forms descending magnetic force, can improve the downstream rate of magnetic aggressiveness, thereby improves separation velocity.
The present invention also can be used for removing other objectionable impurities such as titanium, fluorine, sulphur, phosphorus.
Accompanying drawing explanation
Fig. 1 is the cross-sectional view of high purity iron fine powder two-stage desiliconization purifying plant of the present invention;
Fig. 2 is the A-A cross-sectional view of Fig. 1;
Fig. 3 is composite screen mesh structural representation;
Fig. 4 is the cross-sectional view of the multistage desiliconization purifying plant of high purity iron fine powder of the present invention;
Fig. 5 is the structural representation of monolithic screen cloth;
Fig. 6 and Fig. 7 are respectively two kinds of different sorting process and show flow chart.
Number in the figure 1 is separation tube, and 2 is composite screen mesh, the 21 screen cloth sections that are composite screen mesh, 22 is the flat plate section of composite screen mesh, and 23 is both sides screen cloth, 24 baffle plates that are opposite side, 3 is magnet, and 31 for adding magnetic block, and 4 is selected magnetic mixture, 4a is magnetic aggressiveness, 4b is loose Magnetic Materials, and 5 is a minute constituency, and 6 is feed hopper, 7 is iron fine powder discharging opening, and 8 is low-grade intergrowth and impurity discharging opening.
the specific embodiment
Embodiment mono-: referring to Fig. 6, Fig. 7, and the multistage desiliconization method of purification of a kind of high purity iron fine powder, in ore pulp, carry out repeatedly following just magnetize-loose-reverse magnetization-loose assorting room:
(1) with forward magnetic field, will be selected in Magnetic Materials and be magnetized into chain magnetic aggressiveness, and with screen pack, unmagnetized dispersion impurity be screened out, magnetic aggressiveness glides along screen pack;
(2) between forward magnetic field and opposing magnetic field, magnetic aggressiveness is loose opening gradually, and screen pack is become to flat board, and loose Magnetic Materials glides along flat board;
(3) with opposing magnetic field, remagnetize after the Magnetic Materials upset after loose is become to chain magnetic aggressiveness, and with screen pack, unmagnetized dispersion impurity is screened out.
Described magnetic field intensity is 10～1000 Gausses.
Tangshan magnetic iron ore utilizes said method to prepare the test of high purity iron fine powder.The taste of preparing by common magnetic separator is that 67.85% iron fine powder is as selected sample ore.
Fig. 6 is that Fig. 7 is by utilizing the technique of the method sorting after ball milling by the direct technique to sample ore sorting of the method.
Test one is carried out according to the sorting process of Fig. 6, and the mesh of composite screen mesh is Φ=1.5mm, and magnetic is distance L=140mm;
Test two is carried out according to the sorting process of Fig. 6, and the mesh of composite screen mesh is Φ=1.5mm, and magnetic is distance L=160mm;
Test three is carried out according to the sorting process of Fig. 7, and the mesh of composite screen mesh is Φ=1.5mm, and magnetic is distance L=160mm;
After sorting, interpretation of result sees the following form:
In table, "+" represents on the net in+0.28, and " 0.28 " represents granularity, in 1 represent chats 1, in 2 represent chats 2.
Result of the test shows to adopt three kinds of modes of this method all can realize concentrate grade more than 70% (grade 67.85% that existing magnetic separator is selected).After wherein adopting mill, select technique final concentrate grade can reach 71.52%, concentrate yield is 77.58% again, and comprehensive chats grade is 66.91%, and chats productive rate is 18.24%.From economic angle, above 1 grade of every increase of iron fine powder standard price, price per ton increases by 30 yuan, this factory utilizes this method that grade is brought up to 71.52% from 67.85%, improve altogether 3.67 grades, with every day, the output of 2000 tons of iron fine powders calculates, and can improve income approximately 220,000 every day, every monthly benefits moon 6,600,000, remarkable in economical benefits.
It is as follows that Huoqiu County, Anhui magnetic iron ore utilizes said method to prepare the test of high purity iron fine powder:
Test shows, when system feeds existing equipment approximately 40 tons of concentrate amounts of 120 tons of raw ore amounts, ore dressing grade is 69.33%, and the concentrate grade of selecting by beneficiation method of the present invention is 70.16%, tailings grade 17.67%, the rate of recovery 99.70%.
Embodiment bis-: basic identical with embodiment mono-, different, can also just magnetize-loose-reverse magnetization-loose secondary assorting room, or just magnetizing-loose-reverse magnetization-loose-forward magnetization-three grades of loose assorting rooms.
Embodiment tri-: referring to Fig. 1, Fig. 2, Fig. 3, the multistage desiliconization purifying plant of a kind of high purity iron fine powder, comprise that cross section is the separation tube 1 of rectangle, the both sides of separation tube 1 inwall from top to bottom successively fixed magnets form forward magnetic field, opposing magnetic field (forward and be oppositely comparatively speaking).Middle part in separation tube is tiltedly installed with a plurality of composite screen meshs 2, and mounted angle is 75 °～85 °.This composite screen mesh is prismatic structures, comprises the baffle plate 24 of compound sieve plate, both sides screen cloth 23 and opposite side.Wherein this compound sieve plate in magnetic field, be web plate 21, the flat board 22 of the section of having a common boundary in magnetic field, screen cloth upper end is provided with feed hopper 6, lower end is provided with iron fine powder discharging opening 7, separation tube lower end is provided with discharging opening 8 and auto-adjustment control valve.
Described composite alternating magnetic field is the composite permanet magnet alternating magnetic field that the little magnetic patch of a plurality of same magnetic is combined to form, or composite electromagnetic alternating magnetic field.
The magnetic block that adds that is also provided with same magnetic in magnetic field forms descending magnetic force.
Embodiment tetra-: referring to Fig. 4, content and embodiment mono-are basic identical, and something in common does not repeat, different: the both sides of separation tube 1 inwall from top to bottom successively fixed magnets form a series of multistage magnetic fields that replace such as forward magnetic field, opposing magnetic field.
Embodiment five: referring to Fig. 5, content and embodiment mono-are basic identical, and something in common does not repeat, different: in separation tube, be at least fixed with a composite screen mesh, according to ore dressing treating capacity needs, composite screen mesh can endlessly superpose.
Claims (8)
1. the multistage desiliconization method of purification of high purity iron fine powder, in minute constituency, iron fine powder at least will be carried out once following normal magnetization-loose-reverse magnetization-loose two-stage assorting room:
(1) with forward magnetic field, will be selected in Magnetic Materials and be magnetized into chain magnetic aggressiveness, and with screen pack, unmagnetized dispersion impurity be screened out, magnetic aggressiveness is descending along screen pack;
(2) between forward magnetic field and opposing magnetic field, magnetic aggressiveness is loose opening gradually, screen pack is become to flat board, loose Magnetic Materials is descending along flat board, simultaneously, composite alternating magnetic field is the composite permanet magnet alternating magnetic field that the little magnetic patch of a plurality of same magnetic is combined to form, or composite electromagnetic alternating magnetic field, and the magnetic block that adds that is also provided with same magnetic in magnetic field forms descending magnetic force;
(3) with opposing magnetic field, remagnetize after the Magnetic Materials upset after loose is become to chain magnetic aggressiveness, and with screen pack, unmagnetized dispersion impurity is screened out.
2. the multistage desiliconization method of purification of high purity iron fine powder according to claim 1, is characterized in that, just magnetize-loose-reverse magnetization-loose-forward magnetization-three grades of loose assorting rooms.
3. the multistage desiliconization method of purification of high purity iron fine powder according to claim 1, is characterized in that, before entering sorting, selected Magnetic Materials is ground.
4. the multistage desiliconization method of purification of high purity iron fine powder according to claim 1, is characterized in that, described magnetic field intensity is 10～1000 Gausses.
5. the multistage desiliconization purifying plant of high purity iron fine powder, it is characterized in that: comprise that cross section is the separation tube of rectangle, composite alternating magnetic field and composite screen mesh, the both sides of described separation tube inwall from top to bottom successively fixed magnets form and to be just at least, reverse composite alternating magnetic field, described composite screen mesh tilts to be arranged in separation tube, the downside of this composite screen mesh is compound slab, it is web plate in magnetic field, the flat board of the section of having a common boundary in magnetic field, composite screen mesh upper end is provided with charging aperture, lower end is provided with iron fine powder discharging opening, separation tube lower end is provided with discharging opening and auto-adjustment control valve, described composite alternating magnetic field is the composite permanet magnet alternating magnetic field that the little magnetic patch of a plurality of same magnetic is combined to form, or composite electromagnetic alternating magnetic field, and the magnetic block that adds that is also provided with same magnetic in magnetic field forms descending magnetic force.
6. the multistage desiliconization purifying plant of high purity iron fine powder according to claim 5, is characterized in that, the composite screen mesh that described screen cloth is prismatic structures comprises the baffle plate of compound sieve plate, both sides screen cloth and opposite side.
7. the multistage desiliconization purifying plant of high purity iron fine powder according to claim 5, is characterized in that, the inclination angle of described screen cloth is 75 °～85 °.
8. according to the multistage desiliconization purifying plant of high purity iron fine powder described in the arbitrary claim of claim 5～7, it is characterized in that, in separation tube, be at least fixed with a composite screen mesh.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110031489.5A CN102145315B (en) | 2011-01-29 | 2011-01-29 | Multi-level desiliconizing and purifying method and device for high-purity fine iron powder |
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| CN201110031489.5A CN102145315B (en) | 2011-01-29 | 2011-01-29 | Multi-level desiliconizing and purifying method and device for high-purity fine iron powder |
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| CN102145315B true CN102145315B (en) | 2014-11-26 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1132118A (en) * | 1994-09-13 | 1996-10-02 | 地质矿产部郑州矿产综合利用研究所 | Magnetic field screening method and its appts. |
| CN2508856Y (en) * | 2001-09-30 | 2002-09-04 | 张美焦 | Magnetic reseparator |
| CN2698453Y (en) * | 2003-11-04 | 2005-05-11 | 首钢总公司 | Combination type flashing magnetic field selection machine |
| CN201959863U (en) * | 2011-01-29 | 2011-09-07 | 刘治家 | High-purity iron flavor powder multi-stage desilicification and refinement device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102008057082A1 (en) * | 2008-11-13 | 2010-05-27 | Siemens Aktiengesellschaft | Device for separating ferromagnetic particles from a suspension |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1132118A (en) * | 1994-09-13 | 1996-10-02 | 地质矿产部郑州矿产综合利用研究所 | Magnetic field screening method and its appts. |
| CN2508856Y (en) * | 2001-09-30 | 2002-09-04 | 张美焦 | Magnetic reseparator |
| CN2698453Y (en) * | 2003-11-04 | 2005-05-11 | 首钢总公司 | Combination type flashing magnetic field selection machine |
| CN201959863U (en) * | 2011-01-29 | 2011-09-07 | 刘治家 | High-purity iron flavor powder multi-stage desilicification and refinement device |
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