CN109675715A - A kind of pre-selection technique of the red mixing poor iron ore of magnetic- - Google Patents
A kind of pre-selection technique of the red mixing poor iron ore of magnetic- Download PDFInfo
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- CN109675715A CN109675715A CN201811356158.7A CN201811356158A CN109675715A CN 109675715 A CN109675715 A CN 109675715A CN 201811356158 A CN201811356158 A CN 201811356158A CN 109675715 A CN109675715 A CN 109675715A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B9/00—General arrangement of separating plant, e.g. flow sheets
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B5/00—Washing granular, powdered or lumpy materials; Wet separating
- B03B5/48—Washing granular, powdered or lumpy materials; Wet separating by mechanical classifiers
- B03B5/52—Spiral classifiers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C1/00—Magnetic separation
- B03C1/02—Magnetic separation acting directly on the substance being separated
- B03C1/025—High gradient magnetic separators
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C1/00—Magnetic separation
- B03C1/02—Magnetic separation acting directly on the substance being separated
- B03C1/10—Magnetic separation acting directly on the substance being separated with cylindrical material carriers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B2230/00—Specific aspects relating to the whole B07B subclass
- B07B2230/01—Wet separation
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Abstract
The invention discloses a kind of pre-selection techniques of the red mixing poor iron ore of magnetic-, belong to iron ore dressing field.The present invention the following steps are included: a, by magnetic-it is red mixing poor iron ore through Three stage crushing with single closed circuit stage to -12mm product fine crushing；B, product fine crushing is sieved through wet type straight line shaker, two acquisition -12+3mm, -3mm grades；C, by magnetic separation in the progress of -3mm grade product, middle magnetic tailing carries out high intensity magnetic separation, and high intensity magnetic separation tailing is classified through spiral classifier, and middle magnetic concentrate is delivered to fine ore bin after merging dehydration with high intensity magnetic separation concentrate；D, by magnetic dry separation in the progress of -12+3mm grade product, middle magnetic dry separation tailing carries out strong magnetic dry separation, and middle magnetic dry separation concentrate and the merging of strong magnetic dry separation concentrate are delivered to fine ore bin.The present invention overcomes the shortcomings of that the poor iron ore beneficiation investment of the red mixing of magnetic-is big in the prior art, difficulty is high, a kind of pre-selection technique of red mixing poor iron ore of magnetic-is provided, particularly suitable for magnetic-red mixing poor iron ore of the processing TFe grade between 20.0%-30.0%.
Description
Technical field
The present invention relates to iron ore dressing technical fields, more specifically to a kind of the pre- of the red mixing poor iron ore of magnetic-
Technique is selected, particularly suitable for magnetic-red mixing poor iron ore of the processing TFe grade between 20.0%-30.0%.
Background technique
Pre-selection is the important link of iron ore dressing, tailings discarding by preconcentration be realize " much broken and lessmill ", " early lose can be lost " it is important
Means.For single magnetic iron ore, the application of pre-selection reaches its maturity, and before 2004, the pre-selection of magnetic iron ore is used primarily in
Coarse crushing product (- 300mm), in broken product (- 75mm) using bulk dry type magnetic separation throw tail；Product (- 12mm) fine crushing uses wet type
Magnetic separator carries out tailings discarding by preconcentration in coarse grain.2004, with the successful application of high pressure roller mill, the particle size reduction of magnetic iron ore pre-selection
Enter mill so that magnetic tailings discarding by preconcentration amount greatly increases in its wet type to -3mm and Iron grade is selected to greatly improve, makes do not have recycling originally
The off-balancesheet ore resources of value realize resource utilization, and economic benefit and social benefit are very significant, at present high pressure roller mill-wet type
Coarse grain pre-selection technique has become the standard configuration in chromium depleted zone dressing plant.
But the pre-selection of the red mixing poor iron ore of magnetic-, is applied successfully at present and effect is preferably few.What is mainly used is pre-
Selecting technique has the strong magnetic dry separation of magnetic+roll-type in cartridge type, disadvantage be it is poor to fine fraction separating effect, especially to mine moisture content compared with
In the case where height, separation index can sharply deteriorate；In addition there are also magnetic+bulky grains in cartridge type to found ring pulsating high gradient high magnetic pre-selection work
Skill, high intensity magnetic separation equipment manufacturer has succeeded in developing bulky grain and has found ring pulsating high gradient intensity magnetic separator in recent years, can handle -3mm or less
Hematite, but have to high-pressure roller mill arrange in pairs or groups use, high pressure roller mill by product fine crushing all it is ultra-fine be broken to -3mm after
This technique is used again, the vertical ring pulsating high gradient intensity magnetic separator equipment number of the bulky grain needed is more, high pressure roller mill equipment is added,
Field device configuration difficulty is big, and investment is big, and the red poor iron ore beneficiating factory of mixing of many magnetic-is made to hang back.
Through retrieving, Chinese Patent Application No.: 2017107954387, the applying date: on September 6th, 2017, invention and created name
Are as follows: a kind of raising high-sulfur magnetic-red compound iron ore sorting index beneficiation method, this application is by raw ore first through stage grinding-
Sulphur-low intensity magnetic separation process is selected in flotation, and low intensity magnetic separation tailing is discharged, and obtains qualified iron concentrate and magnetite concentrate product；To the weak of discharge
Magnetic tailing carries out high intensity magnetic separation, throws and removes high intensity magnetic separation tailing T1, obtains strong magnetic rough concentrate；The strong magnetic rough concentrate obtained feeds dusting cover sieve
It is allocated as industry, oversize is removed directly as tailing T2 throwing；Dusting cover undersize feeds spiral chute gravity separation technology.This application tool
Have the advantages that hematite concentrates TFe grade is high, operation recovery is high.
For another example Chinese Patent Application No.: 2015101496121, the applying date: on March 30th, 2015, invention and created name are as follows:
A kind of compound poor iron ore pre-selection new process and its production system, the pre-selection new process of this application, step include compound poor iron
Ore it is broken → fully closed road ultrafine grinding technique is sieved using high pressure roller mill the muck product of upper step is crushed to Φ 3mm → wet
Formula low intensity magnetic separation enters subsequent after mixing with wet high-intensity magnetic separation process integration → concentrate of weak magnetic separator and the concentrate of intensity magnetic separator
Ball milling sorting operation → intensity magnetic separator tailing enters linear vibrating screen II dehydration.Compound poor iron iron ore may be implemented in this application
Stone can largely abandon qualified tailings before entering mill, reduce the purpose for into mill amount, sufficiently realizing " much broken and lessmill early throws early lose ".
To sum up, the above application case be can yet be regarded as a kind of ore-dressing technique of optimization, but the pursuit of mine selecting technology is never stopped in industry
Stagnant, more richer mines are selected during technique is still evolving.
Summary of the invention
1. technical problems to be solved by the inivention
It is an object of the invention to overcome the shortcomings of that the poor iron ore beneficiation investment of the red mixing of magnetic-is big in the prior art, difficulty is high,
Provide a kind of pre-selection technique of the red mixing poor iron ore of magnetic-, particularly suitable for processing TFe grade 20.0%-30.0% it
Between the red mixing poor iron ore of magnetic-.
2. technical solution
In order to achieve the above objectives, technical solution provided by the invention are as follows:
A kind of pre-selection technique of the red mixing poor iron ore of magnetic-of the invention, comprising the following steps:
A, by red fine crushing product of the mixing poor iron ore through Three stage crushing with single closed circuit stage to -12mm of magnetic -；
B, product fine crushing is sieved through wet type straight line shaker, two acquisition -12+3mm, -3mm grades；
C, by magnetic separation in the progress of -3mm grade product, middle magnetic tailing carries out high intensity magnetic separation, and high intensity magnetic separation tailing is through screw classifying
Machine classification, middle magnetic concentrate are delivered to fine ore bin after merging dehydration with high intensity magnetic separation concentrate；
D, by magnetic dry separation in the progress of -12+3mm grade product, middle magnetic dry separation tailing carries out strong magnetic dry separation, middle magnetic dry separation concentrate
Fine ore bin is delivered to the merging of strong magnetic dry separation concentrate.
Further, the straight line sieve plate used in step b is punched screens, screen size 3-5mm.
Further, middle magnetic separation uses magnetic separator in Wet-type permanent magnet drum type, magnetic field strength 0.4-0.6T in step c.
Further, high intensity magnetic separation uses bulky grain to found ring pulsating high gradient intensity magnetic separator in step c, and magnetic field strength is
1.2-1.4T。
Further, using magnetic field dry-dressing machine in permanent-magnet chamber type, magnetic field strength is 0.3-for middle magnetic dry separation in step d
0.5T。
Further, strong magnetic dry separation uses permanent magnetic roll type strong magnetic dry separator, magnetic field strength 1.3-1.5T in step d.
Further, the TFe grade of the red mixing poor iron ore of magnetic-is in 20-30%.
Further, in step c middle magnetic separation magnetic field strength be greater than step d in middle magnetic separation magnetic field strength.
Further, in step c high intensity magnetic separation magnetic field strength be less than step d in high intensity magnetic separation magnetic field strength.
3. beneficial effect
Using technical solution provided by the invention, compared with prior art, there is following remarkable result:
(1) the pre-selection technique of the red mixing poor iron ore of a kind of magnetic-of the invention, first by the red mixing poor iron ore of magnetic-
Product fine crushing uses wet screening for two grades of -12+3mm, -3mm, adopts for the subsequent ore grain size characteristic according to two grades
It is created with suitable pre-selection technique good for mine condition.
(2) a kind of pre-selection technique of the red mixing poor iron ore of magnetic-of the invention is eliminated using wet screening in mine
The influence that moisture content preselects subsequent two grades respectively, even if moisture content is high, after wet screening, the water of -12+3mm grade
It is point also very low, and without fine-graded presence, it will not influence the dry separation effect of this grade.
(3) the pre-selection technique of the red mixing poor iron ore of a kind of magnetic-of the invention, is preselected using classification, is taken full advantage of not
Particle property with grade ore uses targeted pre-selection technique, and the strong magnetic dry separation fritter tailing of -12+3mm grade can
Building materials sale directly is done, the Wet high-intensity magnetic separator tailing of -3mm grade is classified as two grains of -3+0.5mm, -0.5mm through spiral classifier
Grade, -3+0.5mm grade can be used as building sand sale, and -0.5mm grade is into the big well of Tailing thickening, that is, the tailing preselected is only about
1/3 is used as solid waste discharge, and emission reduction effect is obvious.
Detailed description of the invention
Fig. 1 is a kind of pre-selection process flow chart of the red mixing poor iron ore of magnetic-of the invention；
Fig. 2 is a kind of pre-selection processing quality flow chart of the red mixing poor iron ore of magnetic-of the invention.
Specific embodiment
To further appreciate that the contents of the present invention, in conjunction with attached drawing, the present invention is described in detail.
In the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right", "vertical",
The orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" be based on the orientation or positional relationship shown in the drawings, merely to
Convenient for description the present invention and simplify description, rather than the device or element of indication or suggestion meaning must have a particular orientation,
It is constructed and operated in a specific orientation, therefore is not considered as limiting the invention.In addition, term " first ", " second ",
" third " is used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance.
The present invention will be further described with reference to the examples below.
Embodiment 1
As depicted in figs. 1 and 2, the pre-selection technique of the red mixing poor iron ore of a kind of magnetic-of the present embodiment, including following step
It is rapid:
A, the red mixing poor iron ore (- 300mm) of the magnetic-for underground mining being produced and being elevated is through Three stage crushing with single closed circuit stage
To the product fine crushing of -12mm；Wherein the TFe grade of the red mixing poor iron ore of magnetic-TFe grade in 20-30%, the present embodiment exists
25%；Iron grade does not have condition of utilization still under current situation of mining industry in 20% ore below, and Iron grade is 30%
Above then typically directly uses mill selecting technology, and ore of the present embodiment for TFe grade in 20-30% carries out subsequent pre-selection work
Skill；
B, product fine crushing is sieved, two acquisition -12+3mm, -3mm grades through wet type straight line shaker, and is directed to two differences
The particle property of grade product takes different pre-selected patterns respectively；The straight line sieve plate wherein used is punched screens, sieve pore
Having a size of 3mm；Using wet screening, the influence preselected respectively to moisture content in mine to subsequent two grades is eliminated, even if containing
Water rate is high, and after wet screening, the moisture of -12+3mm grade is relatively low, and without fine-graded presence, will not influence this grade
Dry separation effect；
C, by -3mm grade product using magnetic separator in Wet-type permanent magnet drum type carry out in magnetic separation, magnetic field strength 0.4T, in
Magnetic tailing founds ring pulsating high gradient intensity magnetic separator progress high intensity magnetic separation, magnetic field strength 1.2T from bulky grain is flowed into；High intensity magnetic separation tail
Mine is classified through spiral classifier, wherein -3+0.5mm does building sand sale, -0.5mm is delivered to the big well of Tailing thickening；Middle magnetic separation
Concentrate is delivered to fine ore bin after merging dehydration with high intensity magnetic separation concentrate；
D, -12+3mm grade product is delivered to magnetic dry separation in the progress of magnetic field dry-dressing machine, magnetic field in permanent-magnet chamber type through belt
Intensity is 0.3T, and middle magnetic dry separation tailing carries out strong magnetic dry separation into permanent magnetic roll type strong magnetic dry separator by ore discharge funnel, and magnetic field strength is
1.3T, strong magnetic dry separation tailing do building materials sale, and middle magnetic dry separation concentrate and the merging of strong magnetic dry separation concentrate are delivered to fine ore bin.This implementation
The magnetic field strength of middle magnetic separation is greater than the magnetic field strength of middle magnetic separation in step d in example step c, the magnetic field strength of high intensity magnetic separation in step c
Less than the magnetic field strength of high intensity magnetic separation in step d.
The present embodiment first sieves product fine crushing for size fractionated, takes different pre-selection techniques, -3mm for size fractionated
Grade founds ring pulsating high gradient high magnetic pre-selection technique using magnetic separation+bulky grain in Wet-type permanent magnet drum type；- 12+3mm grade product
Granularity is larger, and using magnetic separation in dry type permanent-magnet chamber type+roll-type high intensity magnetic separation, it is dry to have given full play to magnetic dry separation and the strong magnetic of roll-type in cartridge type
Choosing is suitable for the selected feature of narrow rank, has evaded its disadvantage to fine particle stage material separating effect difference, the magnetic field that ore is subject to
Power and ore grain size are directly proportional, directly proportional with the magnetic field gradient of magnetic plant, and the strong magnetic dry separation equipment of roll-type is low with magnetic field gradient, but
Because ore grain size is larger, the magnetic field force that ore is subject to still is enough that ore and barren rock is made to realize sorting.- 3mm grade is using in cartridge type
Magnetic+bulky grain founds ring pulsating high gradient intensity magnetic separator and carries out tailings discarding by preconcentration, this grade product granularity is thin, makes full use of bulky grain vertical
The characteristic that ring pulsating high gradient intensity magnetic separator magnetic field strength is high, magnetic field gradient is high, to realize the tailings discarding by preconcentration of this grade.This implementation
Example realizes the efficient tailings discarding by preconcentration of the red mixing poor iron ore of magnetic-, sorting index under the conditions of product granularity (- 12mm) fine crushing
It is not influenced by raw ore moisture content height, is easy to field conduct, can not only substantially reduce ball milling mine-supplying quantity, but also most pre-
Tailing all resourcebilities are selected to utilize, only about 1/3 preliminary rejection need to be used as solid waste discharge, and " energy-saving " effect is very significant.
It is illustrated below in conjunction with concrete case, the red mixing poor iron ore of magnetic-is derived from certain iron ore, raw ore chemistry multielement point
Analysis the results are shown in Table 1, and Fe clusters analysis the results are shown in Table 2.
1 magnetic of table-red mixing poor iron ore chemistry multielement analysis result (%)
| Project | TFe | SFe | FeO | SiO2 | Al2O3 |
| Content (%) | 25.34 | 23.70 | 8.59 | 53.17 | 6.16 |
| Project | CaO | MgO | S | P | Scaling loss |
| Content (%) | 0.99 | 2.96 | 0.17 | 0.038 | 1.68 |
2 magnetic of table-red mixing poor iron ore Fe clusters analysis result (%)
| Mineral name | Iron phase iron-content | Occupation rate |
| Magnetic iron ore | 12.97 | 50.53 |
| Red (brown) iron ore | 10.18 | 39.66 |
| Ferrosilite | 1.58 | 6.16 |
| Ferric carbonate | 0.79 | 3.08 |
| Iron sulfide | 0.15 | 0.58 |
| Quan Tie | 25.67 | 100.00 |
Essential element in the above ore for ore dressing recycling is iron, and Iron grade is only 25.26%, and major impurity is with SiO2
Based on, the content of objectionable impurities p and s is all very low, and alkaline coefficient (CaO+MgO)/(SiO2+A12O3) of ore is equal to
0.067, belong to typical acid drift.
Embodiment 2
A kind of pre-selection technique of the red mixing poor iron ore of the magnetic-of the present embodiment, substantially with embodiment 1, the difference is that this
The straight line sieve plate that uses in 20%, step b of TFe grade of the red mixing poor iron ore of magnetic-is punched screens in embodiment,
Screen size is 5mm；- 3mm grade product is using magnetic separation in magnetic separator progress, magnetic field strength in Wet-type permanent magnet drum type in step c
For 0.5T, middle magnetic tailing founds ring pulsating high gradient intensity magnetic separator progress high intensity magnetic separation, magnetic field strength 1.3T from bulky grain is flowed into；
In step d -12+3mm grade product through belt be delivered in permanent-magnet chamber type magnetic field dry-dressing machine carry out in magnetic dry separation, magnetic field strength is
0.4T, middle magnetic dry separation tailing carry out strong magnetic dry separation, magnetic field strength 1.4T into permanent magnetic roll type strong magnetic dry separator by ore discharge funnel；This
The magnetic field strength of middle magnetic separation is greater than the magnetic field strength of middle magnetic separation in step d in embodiment step c, the magnetic field of high intensity magnetic separation in step c
Intensity is less than the magnetic field strength of high intensity magnetic separation in step d.
Embodiment 3
A kind of pre-selection technique of the red mixing poor iron ore of the magnetic-of the present embodiment, substantially with embodiment 1, the difference is that this
The straight line sieve plate that uses in 30%, step b of TFe grade of the red mixing poor iron ore of magnetic-is punched screens in embodiment,
Screen size is 4mm；- 3mm grade product is using magnetic separation in magnetic separator progress, magnetic field strength in Wet-type permanent magnet drum type in step c
For 0.6T, middle magnetic tailing founds ring pulsating high gradient intensity magnetic separator progress high intensity magnetic separation, magnetic field strength 1.4T from bulky grain is flowed into；
In step d -12+3mm grade product through belt be delivered in permanent-magnet chamber type magnetic field dry-dressing machine carry out in magnetic dry separation, magnetic field strength is
0.5T, middle magnetic dry separation tailing carry out strong magnetic dry separation, magnetic field strength 1.5T into permanent magnetic roll type strong magnetic dry separator by ore discharge funnel；This
The magnetic field strength of middle magnetic separation is greater than the magnetic field strength of middle magnetic separation in step d in embodiment step c, the magnetic field of high intensity magnetic separation in step c
Intensity is less than the magnetic field strength of high intensity magnetic separation in step d.
Schematically the present invention and embodiments thereof are described above, description is not limiting, institute in attached drawing
What is shown is also one of embodiments of the present invention, and actual structure is not limited to this.So if the common skill of this field
Art personnel are enlightened by it, without departing from the spirit of the invention, are not inventively designed and the technical solution
Similar frame mode and embodiment, are within the scope of protection of the invention.
Claims (9)
1. a kind of pre-selection technique of the red mixing poor iron ore of magnetic-, it is characterised in that: the following steps are included:
A, by red fine crushing product of the mixing poor iron ore through Three stage crushing with single closed circuit stage to -12mm of magnetic -；
B, product fine crushing is sieved through wet type straight line shaker, two acquisition -12+3mm, -3mm grades；
C, by magnetic separation in the progress of -3mm grade product, middle magnetic tailing carries out high intensity magnetic separation, and high intensity magnetic separation tailing is through spiral classifier point
Grade, middle magnetic concentrate are delivered to fine ore bin after merging dehydration with high intensity magnetic separation concentrate；
D, by -12+3mm grade product carry out in magnetic dry separation, middle magnetic dry separation tailing carries out strong magnetic dry separation, middle magnetic dry separation concentrate and strong
The merging of magnetic dry separation concentrate is delivered to fine ore bin.
2. a kind of pre-selection technique of the red mixing poor iron ore of magnetic-according to claim 1, it is characterised in that: adopted in step b
Straight line sieve plate is punched screens, screen size 3-5mm.
3. a kind of pre-selection technique of the red mixing poor iron ore of magnetic-according to claim 1, it is characterised in that: in step c
Magnetic separation is using magnetic separator in Wet-type permanent magnet drum type, magnetic field strength 04-0.6T.
4. a kind of pre-selection technique of the red mixing poor iron ore of magnetic-according to claim 1, it is characterised in that: strong in step c
Magnetic separation founds ring pulsating high gradient intensity magnetic separator, magnetic field strength 1.2-1.4T using bulky grain.
5. a kind of pre-selection technique of the red mixing poor iron ore of magnetic-according to claim 1, it is characterised in that: in step d
Magnetic dry separation is using magnetic field dry-dressing machine in permanent-magnet chamber type, magnetic field strength 0.3-0.5T.
6. a kind of pre-selection technique of the red mixing poor iron ore of magnetic-according to claim 1, it is characterised in that: strong in step d
Magnetic dry separation uses permanent magnetic roll type strong magnetic dry separator, magnetic field strength 1.3-1.5T.
7. a kind of pre-selection technique of the red mixing poor iron ore of magnetic-according to claim 1, it is characterised in that: the red mixing of magnetic-
The TFe grade of poor iron ore is in 20-30%.
8. a kind of pre-selection technique of the red mixing poor iron ore of magnetic-according to claim 1, it is characterised in that: in step c
The magnetic field strength of magnetic separation is greater than the magnetic field strength of middle magnetic separation in step d.
9. a kind of pre-selection technique of the red mixing poor iron ore of magnetic-according to claim 1, it is characterised in that: strong in step c
The magnetic field strength of magnetic separation is less than the magnetic field strength of high intensity magnetic separation in step d.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110773315A (en) * | 2019-10-18 | 2020-02-11 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Full-particle-level pre-selection discarding method for magnetite |
| CN110898957A (en) * | 2019-11-13 | 2020-03-24 | 鞍钢集团矿业有限公司 | Particle size grading pre-selection tailing discarding process for extremely lean hematite |
| WO2021000020A1 (en) * | 2019-07-03 | 2021-01-07 | Fortescue Metals Group Ltd | Method for the beneficiation of iron ore streams |
| CN114130523A (en) * | 2021-11-30 | 2022-03-04 | 安徽马钢矿业资源集团姑山矿业有限公司 | Pre-selection process of high-mud hematite |
| CN115382662A (en) * | 2022-10-28 | 2022-11-25 | 铜源国际工程设计研究有限公司 | Waste-free comprehensive utilization process and system for ultra-lean magnetite resources |
| RU2802647C2 (en) * | 2019-07-03 | 2023-08-30 | Фортескью Металс Груп Лтд | Method for enrichment of iron ore streams |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101502819A (en) * | 2009-03-25 | 2009-08-12 | 中钢集团马鞍山矿山研究院有限公司 | Pre-selection method of low-ore grade magnetic iron ore |
| RU2388544C1 (en) * | 2009-03-11 | 2010-05-10 | Федеральное государственное унитарное предприятие "Всероссийский научно-исследовательский институт минерального сырья им. Н.М. Федоровского" (ВИМС) | Procedure for production of collective concentrate out of mixed fine ingrained iron ore |
| CN102773161A (en) * | 2012-08-14 | 2012-11-14 | 中钢集团马鞍山矿山研究院有限公司 | Magnetic-gravity combined ore dressing technology for hematite |
| CN104722394A (en) * | 2015-03-30 | 2015-06-24 | 安徽马钢工程技术集团有限公司 | Novel composite lean iron ore pre-concentration technology and production system thereof |
| CN108212506A (en) * | 2018-03-09 | 2018-06-29 | 中钢集团马鞍山矿山研究院有限公司 | A kind of classification pre-selection of magnetic-red-water chestnut compound iron ore, fine New Method for Sorting |
| CN108580029A (en) * | 2018-08-01 | 2018-09-28 | 中冶北方（大连）工程技术有限公司 | A kind of red magnetic mixing iron ore beneficiation technique |
-
2018
- 2018-11-14 CN CN201811356158.7A patent/CN109675715A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2388544C1 (en) * | 2009-03-11 | 2010-05-10 | Федеральное государственное унитарное предприятие "Всероссийский научно-исследовательский институт минерального сырья им. Н.М. Федоровского" (ВИМС) | Procedure for production of collective concentrate out of mixed fine ingrained iron ore |
| CN101502819A (en) * | 2009-03-25 | 2009-08-12 | 中钢集团马鞍山矿山研究院有限公司 | Pre-selection method of low-ore grade magnetic iron ore |
| CN102773161A (en) * | 2012-08-14 | 2012-11-14 | 中钢集团马鞍山矿山研究院有限公司 | Magnetic-gravity combined ore dressing technology for hematite |
| CN104722394A (en) * | 2015-03-30 | 2015-06-24 | 安徽马钢工程技术集团有限公司 | Novel composite lean iron ore pre-concentration technology and production system thereof |
| CN108212506A (en) * | 2018-03-09 | 2018-06-29 | 中钢集团马鞍山矿山研究院有限公司 | A kind of classification pre-selection of magnetic-red-water chestnut compound iron ore, fine New Method for Sorting |
| CN108580029A (en) * | 2018-08-01 | 2018-09-28 | 中冶北方（大连）工程技术有限公司 | A kind of red magnetic mixing iron ore beneficiation technique |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021000020A1 (en) * | 2019-07-03 | 2021-01-07 | Fortescue Metals Group Ltd | Method for the beneficiation of iron ore streams |
| CN114072235A (en) * | 2019-07-03 | 2022-02-18 | 福特斯丘金属集团 | Method for concentrating an iron ore stream |
| RU2802647C2 (en) * | 2019-07-03 | 2023-08-30 | Фортескью Металс Груп Лтд | Method for enrichment of iron ore streams |
| CN110773315A (en) * | 2019-10-18 | 2020-02-11 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Full-particle-level pre-selection discarding method for magnetite |
| CN110773315B (en) * | 2019-10-18 | 2021-07-09 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Full-particle-level pre-selection discarding method for magnetite |
| CN110898957A (en) * | 2019-11-13 | 2020-03-24 | 鞍钢集团矿业有限公司 | Particle size grading pre-selection tailing discarding process for extremely lean hematite |
| CN114130523A (en) * | 2021-11-30 | 2022-03-04 | 安徽马钢矿业资源集团姑山矿业有限公司 | Pre-selection process of high-mud hematite |
| CN114130523B (en) * | 2021-11-30 | 2024-03-19 | 安徽马钢矿业资源集团姑山矿业有限公司 | Preselection process of high-mud hematite ore |
| CN115382662A (en) * | 2022-10-28 | 2022-11-25 | 铜源国际工程设计研究有限公司 | Waste-free comprehensive utilization process and system for ultra-lean magnetite resources |
| CN115382662B (en) * | 2022-10-28 | 2023-01-10 | 铜源国际工程设计研究有限公司 | Waste-free comprehensive utilization process and system for ultra-lean magnetite resources |
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