CN103721844A - Magnetic selection and reselection combined process for treating low-grade fine-particle weak-magnetic minerals - Google Patents
Magnetic selection and reselection combined process for treating low-grade fine-particle weak-magnetic minerals Download PDFInfo
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- CN103721844A CN103721844A CN201410011638.5A CN201410011638A CN103721844A CN 103721844 A CN103721844 A CN 103721844A CN 201410011638 A CN201410011638 A CN 201410011638A CN 103721844 A CN103721844 A CN 103721844A
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- magnetic
- grade
- reselection
- concentrate
- mineral
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- 238000000034 method Methods 0.000 title claims abstract description 30
- 229910052500 inorganic mineral Inorganic materials 0.000 title claims abstract description 27
- 239000011707 mineral Substances 0.000 title claims abstract description 27
- 239000010419 fine particle Substances 0.000 title abstract description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 31
- 239000012141 concentrate Substances 0.000 claims abstract description 27
- 229910052742 iron Inorganic materials 0.000 claims abstract description 14
- 238000011282 treatment Methods 0.000 claims abstract description 10
- 239000006148 magnetic separator Substances 0.000 claims abstract description 9
- 230000005484 gravity Effects 0.000 claims description 9
- 238000007885 magnetic separation Methods 0.000 claims description 9
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims description 5
- LIKBJVNGSGBSGK-UHFFFAOYSA-N iron(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Fe+3].[Fe+3] LIKBJVNGSGBSGK-UHFFFAOYSA-N 0.000 claims description 4
- YDZQQRWRVYGNER-UHFFFAOYSA-N iron;titanium;trihydrate Chemical compound O.O.O.[Ti].[Fe] YDZQQRWRVYGNER-UHFFFAOYSA-N 0.000 claims description 4
- -1 chromite Chemical compound 0.000 claims description 3
- ZXOKVTWPEIAYAB-UHFFFAOYSA-N dioxido(oxo)tungsten Chemical compound [O-][W]([O-])=O ZXOKVTWPEIAYAB-UHFFFAOYSA-N 0.000 claims description 3
- RHDUVDHGVHBHCL-UHFFFAOYSA-N niobium tantalum Chemical compound [Nb].[Ta] RHDUVDHGVHBHCL-UHFFFAOYSA-N 0.000 claims description 3
- 229910021646 siderite Inorganic materials 0.000 claims description 3
- 238000011084 recovery Methods 0.000 abstract description 14
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 238000000926 separation method Methods 0.000 abstract description 6
- 239000000725 suspension Substances 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 5
- 238000004064 recycling Methods 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 229910010413 TiO 2 Inorganic materials 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000005188 flotation Methods 0.000 description 1
- 229910052595 hematite Inorganic materials 0.000 description 1
- 239000011019 hematite Substances 0.000 description 1
- IXQWNVPHFNLUGD-UHFFFAOYSA-N iron titanium Chemical compound [Ti].[Fe] IXQWNVPHFNLUGD-UHFFFAOYSA-N 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000011269 treatment regimen Methods 0.000 description 1
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Abstract
The invention belongs to a beneficiation method in the field of mineral processing, particularly relates to a method for improving the recovery efficiency oflow-grade fine-particle weak-magnetic minerals, and discloses a magnetic selection and reselection combined process for treating the low-grade fine-particle weak-magnetic minerals. A magnetic selection and reselection combined procedure is adopted in the process, and the process comprises magnetic selection and reselection. According to the magnetic selection, the minerals are crushed to 10-100 microns, the magnetic selection is carried out through a high gradient magnetic separator at the gauss of 6500-8500, and rough iron ore concentrate is obtained. According to the reselection, size mixing is carried out on the rough iron ore concentrate, the concentration is 20-35wt%, the ore pulp enters a suspension vibration conical surface concentrating machine for reselection and concentration, the separation face taper is 5-10 degrees, vibration frequency is 300-480 times/minute, and the rotating speed of the edge of a separation face is 0.8-2.5m/minute. The process can greatly improve the grade of the the concentrate and lower production cost, and has the advantages of being simple in operation, large in treatment capacity, high in separation efficiency, stable in index and the like.
Description
Technical field
The invention belongs to a kind of beneficiation method of mineral manufacture field, especially relate to the method that improves low-grade fine fraction weak magnetic mineral organic efficiency.
Background technology
Fine-particle minerals recovery technology is a great problem of ore dressing circle always.Along with the poor refinement of mineral resources, need the fine-particle minerals raw material of ore dressing recycling more and more, particularly to measuring the recycling of large, inexpensive weak magnetic fine-particle minerals raw material.At present, industrial recycling low-grade, fine fraction weak magnetic mineral is generally adopted to magnetic separation-floatation process pattern.This technological process is for obtaining high-grade concentrate, and flotation flowsheet is tediously long, and dosing is large, and production cost is high, and the index of concentrate is subject to the influence of fluctuations of ore deposit, medicament condition larger.Suspended vibrating concentrating machine with conical surface (Chinese Patent Application No.: 200910263671.6,201110267598.7) as a kind of microfine gravitational separation equipment, the advantages such as it has that energy consumption is low, concentration ratio is high, environmental protection, stable, easy operating pipe, but applicant is through evidence, only adopt suspended vibrating concentrating machine with conical surface to be also difficult to increase substantially the grade of weak magnetic fine-particle minerals, reduce production costs, moreover also there is no research and the experiment of this respect in the past.
Summary of the invention
The object of this invention is to provide a kind of technique of processing low-grade particulate weak magnetic mineral, this technique can increase substantially concentrate grade, reduces production costs, and also has the features such as simple to operate, treating capacity is large, the efficiency of separation is high and index is stable.
Realizing the technical scheme that object of the present invention takes is: adopt first magnetic separation gravity treatment combined process flow again, 1. magnetic separation, is crushed to 10～100 μ m by mineral, adopts high gradient magnetic separator under 6500～8500 Gausses, to carry out magnetic separation, obtains crude iron concentrate; 2. gravity treatment, sizes mixing to crude iron concentrate, and concentration is 20～35wt%, enters suspended vibrating concentrating machine with conical surface gravity treatment selected, and sorting face cone degree is 5～10 °, and vibration frequency is 300～480 beats/min, and sorting face edge rotating speed is 0.8～2.5 m/min.
Described weak magnetic mineral is bloodstone, limonite, siderite, ilmenite, chromite, wolframite, tantalum niobium concentrate or red mud, first adopt high gradient magnetic separator to process the crude iron concentrate that grade is 25～35wt%, then with suspended vibrating concentrating machine with conical surface re-selection process iron concentrate grade be 55～60wt%.
Main useful technique effect of the present invention is: object of the present invention is low-grade fine fraction weak magnetic mineral, as bloodstone, limonite, siderite, ilmenite, chromite, wolframite, tantalum niobium concentrate or red mud etc., for these class mineral, all can play good action; Technological process adopts magnetic separation-gravity treatment pattern, and raw ore, after the pre-recycling of high gradient magnetic separator, then by suspended vibrating concentrating machine with conical surface enrichment again, can improve concentrate grade significantly; Technique environmental protection of the present invention, energy consumption is low, the efficiency of separation is high, and production cost is low, has very strong feasibility.
Accompanying drawing explanation
Fig. 1 is process chart schematic diagram of the present invention.
The specific embodiment
Below in conjunction with embodiment, the present invention is further elaborated.
Embodiment 1:
A kind of new technology of processing low-grade fine fraction weak magnetic mineral.Derive from somewhere containing For Fine Hematite Ore thing mine tailing, ferrous grade is 14.56%, takes technological process shown in Fig. 1 to sort.Through high gradient magnetic separator, obtain grade and be 27.4% crude iron concentrate, its rate of recovery is 58.34%.Rough concentrate enters immediately Φ 4m suspended vibrating concentrating machine with conical surface and carries out selected, sorting face cone degree is 7 °, vibration frequency is 410 beats/min, and card edge rotating speed is 1.4 ms/min (at use suspended vibrating concentrating machine with conical surface, carry out selected front needs and size mixing, general pulp density is controlled between 20%--35%).Finally obtaining iron concentrate grade is 60%, and the rate of recovery is 45.33%.
Table 1:
| Operation | Productive rate (%) | Grade (%) | The rate of recovery (%) | Concentration ratio (doubly) |
| Magnetic separation | 31 | 27.4% | 58.34 | 1.88 |
Table 2:
| Operation | Productive rate (%) | Grade (%) | The rate of recovery (%) | Concentration ratio (doubly) |
| Gravity treatment is selected | 35.48 | 60 | 77.7 | 2.19 |
| Always (to raw ore) | 11 | 60 | 45.33 | 4.12 |
Embodiment 2:
A kind of new technology of processing low-grade fine fraction weak magnetic mineral.Derive from the titanium iron ore in somewhere, TiO
2grade is that 10.13%(Fe grade is 10.2%), take technological process shown in Fig. 1 to sort.Through high gradient magnetic separator, obtain grade and be 18.5% rough concentrate (Fe grade is 15.39%), its rate of recovery is 60.27%.Rough concentrate enters immediately Φ 4m suspended vibrating concentrating machine with conical surface and carries out selected, sorting face cone degree is 7 °, vibration frequency is 390 beats/min, card edge rotating speed is 1.5 ms/min (slurry concentration is controlled between 20%--30%), finally obtaining ilmenite concentrate grade is that 41%(Fe grade is 30.24%), the rate of recovery is 49.03%.
Table 3:
| Operation | Productive rate (%) | Grade (%) | The rate of recovery (%) | Concentration ratio (doubly) |
| Magnetic separation | 33 | 18.5 | 60.27 | 1.83 |
Table 4:
| Operation | Productive rate (%) | Grade (%) | The rate of recovery (%) | Concentration ratio (doubly) |
| Gravity treatment is selected | 36.7 | 41 | 81.35 | 2.22 |
| Always (to raw ore) | 12.11 | 41 | 49.03 | 4.05 |
Embodiment 3:
A kind of new technology of processing low-grade fine fraction weak magnetic mineral.The particulate red mud mineral tailings that derives from somewhere, ferrous grade is 21.33%, takes technological process shown in Fig. 1 to sort.Through high gradient magnetic separator, obtain grade and be 31.14% crude iron concentrate, its rate of recovery is 81.54%.Rough concentrate enters immediately Φ 4m suspended vibrating concentrating machine with conical surface and carries out selected, sorting face cone degree is 7 °, vibration frequency is 400 beats/min, and card edge rotating speed is 1.8 ms/min (at use suspended vibrating concentrating machine with conical surface, carry out selected front needs and size mixing, general pulp density is controlled between 20%--35%).Finally obtaining iron concentrate grade is 58%, and the rate of recovery is 40.62%.
Table 5:
| Operation | Productive rate (%) | Grade (%) | The rate of recovery (%) | Concentration ratio (doubly) |
| Magnetic separation | 55.85 | 31.14 | 81.54 | 1.46 |
Table 6:
| Operation | Productive rate (%) | Grade (%) | The rate of recovery (%) | Concentration ratio (doubly) |
| Gravity treatment is selected | 26.76 | 58 | 49.82 | 1.86 |
| Always (to raw ore) | 14.94 | 58 | 40.62 | 2.72 |
Claims (2)
1. a technique of processing low-grade particulate weak magnetic mineral, is characterized in that: adopt first magnetic separation gravity treatment combined process flow again, 1. magnetic separation, is crushed to 10～100 μ m by mineral, adopts high gradient magnetic separator under 6500～8500 Gausses, to carry out magnetic separation, obtains crude iron concentrate; 2. gravity treatment, sizes mixing to crude iron concentrate, and concentration is 20～35wt%, enters suspended vibrating concentrating machine with conical surface gravity treatment selected, and sorting face cone degree is 5～10 °, and vibration frequency is 300～480 beats/min, and sorting face edge rotating speed is 0.8～2.5 m/min.
2. by the technique of the low-grade particulate weak magnetic mineral of processing claimed in claim 1, it is characterized in that: described weak magnetic mineral is bloodstone, limonite, siderite, ilmenite, chromite, wolframite, tantalum niobium concentrate or red mud, first adopt high gradient magnetic separator to process the crude iron concentrate that grade is 25～35wt%, then with suspended vibrating concentrating machine with conical surface re-selection process iron concentrate grade be 55～60wt%.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104815749A (en) * | 2015-05-18 | 2015-08-05 | 湖南省邑金投资有限公司 | Method for extracting black tungsten from low grade fine grain disseminated wolframite ores and production line |
| CN105214832A (en) * | 2015-10-28 | 2016-01-06 | 山东科技大学 | A kind of gravity separation method red mud efficiently selects iron system and technique |
| CN107312925A (en) * | 2016-04-26 | 2017-11-03 | 四川航都钛业科技有限公司 | One kind utilizes calcium hydroxide and sodium hydroxide（Potassium hydroxide）The method that mixed processing refractory metal mineral prepare correspondence oxide |
| CN108187901A (en) * | 2017-12-29 | 2018-06-22 | 杨和平 | A kind of beneficiation method being combined using metal accumulation and spontaneous carrier flotation |
| CN108246491A (en) * | 2018-01-25 | 2018-07-06 | 包头钢铁（集团）有限责任公司 | The process of fine chrome mine is recycled in a kind of gravity tailings of high-carbon chrome iron for smelting wet slag |
| CN109201354A (en) * | 2018-11-06 | 2019-01-15 | 中南大学 | MAGNETIC HYDROCYCLONES, magnetic reconnection conjunction separation system and the magnetic reconnection selected for weak magnetic mineral closes the method sorted |
| CN109530080A (en) * | 2018-11-21 | 2019-03-29 | 中南大学 | A kind of magnetic reconnection conjunction sorting process |
| CN111229449A (en) * | 2020-02-26 | 2020-06-05 | 赣州有色冶金研究所 | Tungsten ore sorting method |
| CN111346741A (en) * | 2020-03-16 | 2020-06-30 | 江西理工大学 | Method for recycling fine-grained wolframite by applying superconducting magnetic separation |
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| CN102302973A (en) * | 2011-09-10 | 2012-01-04 | 昆明理工大学 | Improved suspended vibrating concentrating machine with conical surface |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104815749A (en) * | 2015-05-18 | 2015-08-05 | 湖南省邑金投资有限公司 | Method for extracting black tungsten from low grade fine grain disseminated wolframite ores and production line |
| CN104815749B (en) * | 2015-05-18 | 2017-04-26 | 湖南省邑金投资有限公司 | Method for extracting black tungsten from low grade fine grain disseminated wolframite ores and production line |
| CN105214832A (en) * | 2015-10-28 | 2016-01-06 | 山东科技大学 | A kind of gravity separation method red mud efficiently selects iron system and technique |
| CN105214832B (en) * | 2015-10-28 | 2017-09-19 | 山东科技大学 | A kind of gravity separation method red mud efficiently selects iron system and technique |
| CN107312925A (en) * | 2016-04-26 | 2017-11-03 | 四川航都钛业科技有限公司 | One kind utilizes calcium hydroxide and sodium hydroxide（Potassium hydroxide）The method that mixed processing refractory metal mineral prepare correspondence oxide |
| CN108187901A (en) * | 2017-12-29 | 2018-06-22 | 杨和平 | A kind of beneficiation method being combined using metal accumulation and spontaneous carrier flotation |
| CN108246491A (en) * | 2018-01-25 | 2018-07-06 | 包头钢铁（集团）有限责任公司 | The process of fine chrome mine is recycled in a kind of gravity tailings of high-carbon chrome iron for smelting wet slag |
| CN109201354A (en) * | 2018-11-06 | 2019-01-15 | 中南大学 | MAGNETIC HYDROCYCLONES, magnetic reconnection conjunction separation system and the magnetic reconnection selected for weak magnetic mineral closes the method sorted |
| CN109201354B (en) * | 2018-11-06 | 2023-10-31 | 中南大学 | Magnetic hydrocyclone, combined magnetic-gravity separation system and combined magnetic-gravity separation method for weakly magnetic mineral concentration |
| CN109530080A (en) * | 2018-11-21 | 2019-03-29 | 中南大学 | A kind of magnetic reconnection conjunction sorting process |
| CN111229449A (en) * | 2020-02-26 | 2020-06-05 | 赣州有色冶金研究所 | Tungsten ore sorting method |
| CN111229449B (en) * | 2020-02-26 | 2021-11-09 | 赣州有色冶金研究所有限公司 | Tungsten ore sorting method |
| CN111346741A (en) * | 2020-03-16 | 2020-06-30 | 江西理工大学 | Method for recycling fine-grained wolframite by applying superconducting magnetic separation |
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Effective date of registration: 20200812 Address after: No. 9220-2, floor 2, Chuangye building B, Science Park, Kunming University of technology, No. 296, Xuefu Road, Wuhua District, Kunming City, Yunnan Province, 650000 Patentee after: KUNMING LIGONG KAIJISI TECHNOLOGY Co.,Ltd. Address before: 650093, No. 253, Xuefu Road, Wuhua District, Yunnan, Kunming (Kunming University of Science and Technology) Patentee before: Kunming University of Science and Technology |
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