CN104984824B - A kind of method for grinding magnetic separation - Google Patents
A kind of method for grinding magnetic separation Download PDFInfo
- Publication number
- CN104984824B CN104984824B CN201510297962.2A CN201510297962A CN104984824B CN 104984824 B CN104984824 B CN 104984824B CN 201510297962 A CN201510297962 A CN 201510297962A CN 104984824 B CN104984824 B CN 104984824B
- Authority
- CN
- China
- Prior art keywords
- magnetic separation
- grinding
- powder
- magnetic
- mineral
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a kind of method for grinding magnetic separation, this method grinds mineral powder to be selected first, and rub simultaneously dispersed mineral particle, then magnetic separation.The present invention is overcome intergranular gravitation, fully dispersed mineral powder is provided for magnetic separation, and then improve and sort ability using the electrogenesis of friction and the shear action of friction.Iron ore concentrate powder is sorted with the inventive method, successively after a dry grinding magnetic separation and four wet lapping magnetic separation, the Iron grade of iron ore concentrate powder is by 67.15% raising to 69.62%, iron recovery 99.00%.The present invention is simple and environmentally-friendly, saves, efficiently.
Description
Technical field
The present invention relates to the dressing method of mineral, especially a kind of method for grinding magnetic separation.
Background technology
For the sorting of fine mineral, overcome in the electrostatic attraction between particle, Van der Waals force, wet dressing and exist
Capillary force, be improve concentrate grade premise.Why flotation is applied to processing fine, is because regulator
The surface electrical behavior of ore particles can be changed, the capillary that collecting agent can be reduced as a kind of surfactant between ore particles is made
Firmly, medicament weakens the Van der Waals force between ore particles in the synergy of mineral surfaces, and produces mineral floatability
Difference, thus sorted, very high sorting index can be obtained.Flotation is typically to obtain high-grade valuable mineral ore-dressing technique
Last processing procedure, such as：Past application and present improved Continuous Grinding, single alkaline direct floatation process, stage grinding, again
Choosing-magnetic separation-acid direct floatation process, Continuous Grinding, weak magnetic-strong magnetic-anion reverse floatation technique, stage grinding, thickness grading,
Gravity treatment-magnetic separation-anion reverse floatation technique (metal mine, 2006,365 (11), 35-40).Flotation is effective despite mineral
Means are sorted, but water pollution is serious, and some floatation process also need to heat, high energy consumption.Therefore, developing other mineral and sorting technology and be
It is necessary.
The content of the invention
The present invention provides a kind of method for grinding magnetic separation, it is therefore an objective to overcomes the gravitation between particle to improve magnetic separation by friction
The ability sorted, to obtain high-grade concentrate, especially obtain high-grade iron ore concentrate.
A kind of to grind the method for magnetic separation, it is characterized in that grinding mineral powder to be selected first, rub simultaneously dispersed mineral particle, so
Magnetic separation is once afterwards.
A kind of method of described grinding magnetic separation, it is characterized in that milling time is 0.2-5min, the magnetic separation time is 0.01-
5min。
The method of described a kind of grinding magnetic separation, it is characterized in that grinding magnetic separation mode includes：Wet lapping magnetic separation, dry type are ground
Magnetic separation and the wet magnetic separation of dry grinding are ground, the mineral powder of dry grinding magnetic separation is dry powder, and the medium of wet lapping magnetic separation is water, dry to grind
Grind after wet magnetic separation is ground for dry powder and add water wet magnetic separation.
The method of described a kind of grinding magnetic separation, it is characterized in that magnetic powder is held with magnet after grinding, with non magnetic powder
Body separates.
A kind of method of described grinding magnetic separation, it is characterized in that magnetic powder is held by dividing plate with magnet after grinding, with
Non magnetic powder separation.
The method of described a kind of grinding magnetic separation, it is characterized in that magnetic separation process is：With dividing plate and the structure choosing of mine tailing receiver
Other space, positioned at sorting on the outside of spatial clapboard, the miberal powder after grinding is placed in be sorted in space magnet, magnet is entered relative to dividing plate
Row moves back and forth the discrepant mineral of sorting magnetic, sorts during wet magnetic separation and water is full of in space.
The method of described a kind of grinding magnetic separation, it is characterized in that mineral powder to be selected is iron ore powder.
A kind of method of described grinding magnetic separation, sorted it is characterized in that carrying out iron ore powder with 1-10 grinding magnetic separation.
It is of the invention compared with existing mineral dressing method, it significantly has the beneficial effect that：
1. the present invention introduces polishing before magnetic separation, be in order that between mineral grain, mineral grain and lapping apparatus it
Between produce friction, using friction electrogenesis and friction shear action, overcome electrostatic attraction, Van der Waals force and wet method choosing
Capillary force present in ore deposit, in addition, it helps monomer dissociation, so, fully dispersed mineral powder is provided for magnetic separation
Body, and then improve iron concentrate grade.In order to be different from existing other magnetic separation technologies, present invention provide that magnetic separation 1 time in grinding magnetic separation.
Polishing in the present invention is to realize the monomer separation of mineral grain adhesion body, grinds that the time of ore particle is short, and energy consumption is low, nothing
The overground phenomenon of mineral grain, without classification, this is totally different from conventional ball-milling method.Ball milling is ore dressing classification means, for reality
The monomer dissociation of existing mineral intergrowth, the chemical bond destroyed with ball mill by the metal ball left at a high speed between intergrowth, with punching
Hit power and smash and fine grinding is carried out based on ore particle, mechanical milling process time length, high energy consumption, the overground argillization phenomenon of ore particle, follow-up work be present
Make needs to be handled with classification, so, more broken few ball millings are advocated in ore dressing at present.
It is 66.02%, with fine grain magnetic for Iron grade 2. dressing method of the present invention is simple and environmentally-friendly, saves, efficiently
Property iron based on high grade iron concentrate, the grinding of dry type magnetic separation obtains Iron grade after sorting be 67.40%, and iron recovery is
99.23% iron ore concentrate；It is 68.91% to obtain Iron grade after eight wet magnetic separation grindings sort, iron recovery 98.33%
Iron ore concentrate；It is 67.15% for Iron grade, 89% high grade iron concentrate is accounted for below 71 μm of granularity, successively through a dry type
It is 69.62% that magnetic separation grinding, four wet magnetic separation grindings obtain Iron grade after sorting, and iron recovery is 99.00% iron ore concentrate.
Brief description of the drawings
Fig. 1 is a kind of process chart for the method for grinding magnetic separation.
Symbol description in figure：(1) it is to sort process first step to N steps to (N)；F and R is respectively the essence per step
Ore deposit and mine tailing.
Embodiment
The present invention is described in detail with embodiment below in conjunction with the accompanying drawings.
Embodiment 1
As shown in figure 1, a kind of method for grinding magnetic separation, ore powder to be selected is Iron grade 67.15%, wherein with Armco magnetic iron
Based on, accounted for below 71 μm of granularity 89% iron ore.
It is a kind of grind magnetic separation method the step of be：(1) dry grinding magnetic separation sorts material powder, obtains concentrate 1F and tail
Ore deposit 1R；(2) wet lapping magnetic separation sorts concentrate 1F, obtains concentrate 2F and mine tailing 2R；(3) wet lapping magnetic separation sorts concentrate 2F,
Obtain concentrate 3F and mine tailing 3R；(4) wet lapping magnetic separation sorts concentrate 3F, obtains concentrate 4F and mine tailing 4R；(5) wet lapping magnetic
Concentrate 4F is sorted, obtains concentrate 5F and mine tailing 5R.Concentrate 5F is final concentrate, Iron grade 69.62%, and iron recovery is
99.00%.It is true tailings to merge mine tailing 1R-5R, sorts the water circulation use of process.
The dry grinding magnetic separation process that this method is related to is：Using mortar and pestle as grinding apparatus, grinding raw material is dry powder
Material, after grinding 0.5-2min, powder is moved on on smooth papery support board, make mine tailing receiver with papery support board, in ore deposit
Structure closing dry type sorts space after back-off wide-mouthed flat-bottom glass container above powder, and Disengagement zone is highly 18mm, and dividing plate is wide-mouth
The bottom of flat bottom glass container, magnet are 210-320mT in magnetic induction intensity caused by dividing plate another side.Dry type magnetic separation sorted
Cheng Zhong, dividing plate is motionless, and magnet is moved back and forth above dividing plate, and iron ore powder follows magnet movement, in motion, magnetic and weak magnetic
Iron ore powder is occluded on dividing plate by magnet turns into concentrate, rather than the gangue such as magnetic quartz powder is constantly dumped into mine tailing receiver
As mine tailing, stop moving magnet after 3-5min, concentrate is sucked by glass partition with magnet and removed, complete a dry type and grind
Grind magnetic separation.
The wet lapping magnetic separation process that this method is related to is：Using mortar and pestle as grinding apparatus, powder and water in mortar
Mass ratio is 1:1-30, after grinding 0.5-5min, the magnet that concentrate is 150-400mT with magnetic induction intensity is held, moved into another
One mortar or other receivers, complete a wet lapping magnetic separation.
Embodiment 2
Iron ore concentrate to be selected is Iron grade 66.02%, based on fine grain Armco magnetic iron.Ground by one kind as shown in Figure 1
The method of magnetic separation sorts.
Specifically sorting step is：(1) dry grinding magnetic separation sorts material powder, obtains concentrate 1F and mine tailing 1R.Concentrate 1F
Iron grade be 67.40%, iron recovery 99.23%.
Involved dry grinding magnetic selection method is the same as embodiment 1.
Embodiment 3
Iron ore concentrate to be selected is the same as embodiment 2.Sorted by a kind of method of grinding magnetic separation as shown in Figure 1.
Specifically sorting step is：(1) wet lapping magnetic separation sorts material powder, obtains concentrate 1F and mine tailing 1R；(2)-(8)
Wet lapping magnetic separation sorts the concentrate that previous step obtains, and obtains concentrate 8F and mine tailing 2R-8R.Concentrate 8F is final concentrate, iron
Grade is 68.91%, iron recovery 98.33%.It is true tailings to merge mine tailing 1R-8R, sorts the water circulation use of process.
Involved wet lapping magnetic selection method is the same as embodiment 1.
Embodiment 4
Iron ore to be selected is containing Armco magnetic iron, martite, bloodstone etc., Iron grade 49.10%, is accounted for below 75 μm of granularity
75%.Sorted by a kind of method of grinding magnetic separation as shown in Figure 1.
Specifically sorting step is：(1) wet lapping magnetic separation sorts material powder, obtains concentrate 1F and mine tailing 1R；(2)-(7)
Wet lapping magnetic separation sorts the concentrate that previous step obtains, and obtains concentrate 7F and mine tailing 2R-7R, and concentrate 7F is final concentrate, iron
Grade is 69.05%, iron recovery 82.40%.It is true tailings to merge mine tailing 1R-7R, sorts the water circulation use of process.
Involved wet lapping magnetic selection method is the same as embodiment 1.
Claims (5)
1. the method for magnetic separation is ground a kind of, it is characterized in that grinding mineral powder to be selected first, rub simultaneously dispersed mineral particle, then
Magnetic separation is once；Milling time is 0.2-5min, and the magnetic separation time is 0.01-5min；Mineral powder to be selected is iron ore concentrate；With 1-10 times
Grinding magnetic separation carries out iron ore powder and sorted.
A kind of 2. method for grinding magnetic separation according to claim 1, it is characterized in that grinding magnetic separation mode includes：Wet lapping
Magnetic separation or dry grinding magnetic separation or the wet magnetic separation of dry grinding, the mineral powder of dry grinding magnetic separation is dry powder, wet lapping magnetic separation
Medium is water, and the wet magnetic separation of dry grinding is after dry powder is ground plus water wet magnetic separation；Mineral powder to be selected is iron ore powder.
3. a kind of method for grinding magnetic separation according to claim 1, it is characterized in that magnetic powder is held with magnet after grinding,
Separated with non magnetic powder.
A kind of 4. method for grinding magnetic separation according to claim 1, it is characterized in that being held after grinding with magnet by dividing plate
Magnetic powder, separated with non magnetic powder.
A kind of 5. method for grinding magnetic separation according to claim 1, it is characterized in that magnetic separation process is：Connect with dividing plate and mine tailing
Receive device structure and sort space, positioned at sorting on the outside of spatial clapboard, the miberal powder after grinding is placed in be sorted in space magnet, makes magnet phase
Moved back and forth the discrepant mineral of sorting magnetic for dividing plate, sort during wet magnetic separation and water is full of in space.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510297962.2A CN104984824B (en) | 2015-06-03 | 2015-06-03 | A kind of method for grinding magnetic separation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510297962.2A CN104984824B (en) | 2015-06-03 | 2015-06-03 | A kind of method for grinding magnetic separation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104984824A CN104984824A (en) | 2015-10-21 |
| CN104984824B true CN104984824B (en) | 2018-02-09 |
Family
ID=54296787
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510297962.2A Active CN104984824B (en) | 2015-06-03 | 2015-06-03 | A kind of method for grinding magnetic separation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104984824B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109603971A (en) * | 2018-12-04 | 2019-04-12 | 青海泰宁水泥有限公司 | It is used to prepare the device and method laid bricks with cement grinding aid |
| CN111952555A (en) * | 2020-07-07 | 2020-11-17 | 华南理工大学 | Lithium ion battery cathode material based on fine iron powder and preparation |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2368654C1 (en) * | 2008-04-29 | 2009-09-27 | Закрытое акционерное общество "НАНОТРАНС" | Method of receiving of antiwear composition made of serpentinite and composition on its basis |
| CN101502819B (en) * | 2009-03-25 | 2010-11-24 | 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 |
| CN101954311B (en) * | 2009-07-16 | 2011-12-21 | 吴跃进 | Iron ore dry powder magnetic separation technology and equipment |
| CN103263977B (en) * | 2013-05-15 | 2014-11-26 | 包钢集团矿山研究院（有限责任公司） | Process for recovering iron and rare earth in baotite low-intensity magnetic separation tailings |
| CN104399584A (en) * | 2014-12-13 | 2015-03-11 | 唐山市丰润区华晨机械维修部 | Dry magnetic separation technology for waste steel slags |
| CN104549713A (en) * | 2015-01-13 | 2015-04-29 | 辽宁科技大学 | Simple and efficient magnetic separation method for low-grade iron minerals |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59154148A (en) * | 1983-02-22 | 1984-09-03 | Nec Corp | Separation of magnetic particles and nonmagnetic particles |
-
2015
- 2015-06-03 CN CN201510297962.2A patent/CN104984824B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2368654C1 (en) * | 2008-04-29 | 2009-09-27 | Закрытое акционерное общество "НАНОТРАНС" | Method of receiving of antiwear composition made of serpentinite and composition on its basis |
| CN101502819B (en) * | 2009-03-25 | 2010-11-24 | 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 |
| CN101954311B (en) * | 2009-07-16 | 2011-12-21 | 吴跃进 | Iron ore dry powder magnetic separation technology and equipment |
| CN103263977B (en) * | 2013-05-15 | 2014-11-26 | 包钢集团矿山研究院（有限责任公司） | Process for recovering iron and rare earth in baotite low-intensity magnetic separation tailings |
| CN104399584A (en) * | 2014-12-13 | 2015-03-11 | 唐山市丰润区华晨机械维修部 | Dry magnetic separation technology for waste steel slags |
| CN104549713A (en) * | 2015-01-13 | 2015-04-29 | 辽宁科技大学 | Simple and efficient magnetic separation method for low-grade iron minerals |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104984824A (en) | 2015-10-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106984425B (en) | A kind of sub-prime classification diversion processing method of Lower Grade Micro-fine Grain tin ore | |
| CN102527504B (en) | Magnetic ore dressing method | |
| Rocha et al. | Iron ore slimes flotation | |
| Xiong et al. | Developments in the physical separation of iron ore: magnetic separation | |
| CN104888947B (en) | The magnetic separation of fine grain teeth cloth magnetic-red composite ore-centrifuge sorting process | |
| CN109351467A (en) | A kind of sorting process based on the iron mineral disseminated grain size processing red mixed ore of magnetic | |
| CN102909125B (en) | Recleaning process for section of strong magnetic tailings in mixed lean iron ores | |
| US20160008822A1 (en) | Method for separating a defined mineral phase of value from a ground ore | |
| CN106179759B (en) | High-voltage pulse outfield intensifying combination electrostatic separation reclaims the method and apparatus of magnesite | |
| CN103962232A (en) | Rare earth ore beneficiation method | |
| CN105536984B (en) | A kind of magnetic selection method having both tailings discarding by preconcentration and thickness grading and three product magnetic separators | |
| CN108405173B (en) | Novel fine beneficiation process for magnetic hematite and siderite mixed iron ore | |
| CN105944825B (en) | A kind of ore dressing and desiliconizing enrichment method of Fine Hematite Ore | |
| CN105665122A (en) | Beneficiation method for recovering pyrites from coal gangue | |
| CN105195427B (en) | A kind of iron ore dry separation technique based on dense gas solid bed | |
| CN104984824B (en) | A kind of method for grinding magnetic separation | |
| CN110586315A (en) | Full-dry type iron ore sorting method | |
| CN103230832A (en) | Beneficiation method for recovering fine fraction iron from strong magnetic separation gangues of ferric oxide ores | |
| CN109894267A (en) | The magnetic of the red compound iron ore of magnetic-- weight method for separating | |
| CN105689126A (en) | Mineral processing process for oolitic hematite | |
| CN104549713B (en) | Simple and efficient magnetic separation method for low-grade iron minerals | |
| CN112452516A (en) | Hard rock crushing method for semi-autogenous grinding process of ferromagnetic ore | |
| CN109718946A (en) | A kind of red compound iron ore of magnetic-without ore flotation method | |
| CN104888943B (en) | Magnetic separation method for obtaining high-grade iron ore concentrate | |
| CN117295557A (en) | Mineral separation process |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |