CN103949337A - Lean magnetite tailings reselection, magnetic separation and flotation combined ore separation process - Google Patents
Lean magnetite tailings reselection, magnetic separation and flotation combined ore separation process Download PDFInfo
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- CN103949337A CN103949337A CN201410213706.6A CN201410213706A CN103949337A CN 103949337 A CN103949337 A CN 103949337A CN 201410213706 A CN201410213706 A CN 201410213706A CN 103949337 A CN103949337 A CN 103949337A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/52—Mechanical processing of waste for the recovery of materials, e.g. crushing, shredding, separation or disassembly
Abstract
The invention belongs to the technical field of ore separation, and particularly relates to a lean magnetite tailings reselection, magnetic separation and flotation combined ore separation process. Lean magnetite tailings are subjected to reselection by a spiral chute after being finely sieved, firstly, the rough separation is carried out, then, the fine separation is carried out, and reselected ore concentrate is obtained; the reselected ore concentrate is subjected to first-section ore grinding, first-section magnetic separation, second-section ore grinding and second-section magnetic separation, and magnetically separated ore concentrate is obtained and is manufactured into ore slurry; pH value regulating agents, inhibiting agents, activating agents and collecting agents are added into the ore slurry for carrying out reverse flotation, firstly, the rough separation is carried out, roughed ore concentrate and roughed middlings are obtained, the roughed ore concentrate is subjected to fine separation, ore concentrate and middlings are obtained, the roughed middlings is subjected to scavenging, middlingss and tailings are obtained, the middlingss return for carrying out flotation rough separation, and the tailings return for carrying out second-section ore grinding. The ore separation process has the advantages that the pollution is reduced, the potential safety hazard caused by tailings storage is also reduced, the economic benefits of enterprises are improved, the social environmental benefits are improved, and the sustainable development of enterprises and societies is promoted.
Description
Technical field
The invention belongs to technique of preparing field, be specifically related to a kind of poor magnetic iron ore mine tailing weight-magnetic-floating combined mineral dressing technology.
Background technology
China's iron mineral resource consumption figure is large, resource scarcity, bargh has produced a large amount of mine tailings in process of production, the full iron grade average out to 8%-12% of China's iron ore mine, have even up to 27%.With 4,500,000,000 tons of calculating of the total volume of cargo in storage of current iron tailings, in mine tailing, be equivalent to have 500,000,000 tons of left and right of iron, but the most mine tailings of China are not yet fully utilized at present, and comprehensive utilization ratio is lower, major part is discharged into Tailings Dam or discarded storing up, not only cause huge potential safety hazard, and environment has been caused to larger impact.
Iron tailings is the waste residue that iron ore discharges after ore-dressing technique is chosen iron ore concentrate.Due to the restriction of technology, generally take landfill to dispose to iron tailings for a long time, this is land occupation not only, and causes environmental pollution and safety problem, pays land requisition expense, freight charges and landfill expense simultaneously, has increased the production cost of ore dressing.Along with developing rapidly of steel industry, the yield of iron ore constantly increases, the mine tailing amount of ore dressing plant discharge also grows with each passing day, and a large amount of mine tailings of storing up bring many difficult problems to mining industry environment and economic dispatch, has become one of major issue that mineral products and steel industry sustainable development face.Along with surface mining forwards underground mining to, underground mining requires goaf consolidated fill, and the direct filling of mine tailing will cause the waste of a part of valuable mineral, and the secondary utilization of carrying out iron tailings is the fundamental solution that solves mine tailing problem.
Pay much attention to abroad the comprehensive utilization of iron tailings, its research work starting early, the handle realization of many developed countries as one of development goal, is considered as the comprehensive utilization degree of resource of tailings one of mark of weighing a national science and technology level and economic development level without waste material mine.In recent years, along with the continuous enhancing of environmental protection and resources conservation consciousness, the comprehensive utilization work of iron tailings has caused the common concern in China mine, and how comprehensive utilization is made good use of iron tailings is the difficult problem that needs are captured.
Summary of the invention
The object of this invention is to provide a kind of poor magnetic iron ore mine tailing weight-magnetic-floating combined mineral dressing technology, reduced pollution, alleviated mine tailing and deposited the potential safety hazard of bringing, improved economic benefit, improved social environment benefit, promote social sustainable development.
Poor magnetic iron ore mine tailing weight-magnetic of the present invention-floating combined mineral dressing technology, step is as follows:
(1) after poor magnetic iron ore mine tailing dusting cover, adopt spiral chute to carry out gravity treatment, first roughly select again the selected gravity concentrate that obtains;
(2) gravity concentrate, through primary grinding, a stages of magnetic separation, secondary grinding and two stages of magnetic separation, obtains magnetic concentrate and makes ore pulp;
(3) in ore pulp, add pH value adjusting agent, inhibitor, activator and collecting agent to carry out reverse flotation, first roughly select and obtain roughly selecting concentrate and roughly select chats, roughly select selected concentrate and the chats of obtaining of concentrate, roughly selecting chats scans and obtains chats and mine tailing, chats returns and carries out roughing flotation, and mine tailing returns and carries out secondary grinding.
Primary grinding granularity described in step (2) is-0.076mm85% that one stages of magnetic separation magnetic field intensity is 318.47KA/m.
Secondary grinding granularity described in step (2) is-0.045mm85% that two stages of magnetic separation magnetic field intensities are 159.47KA/m.
Pulp density described in step (2) is 40-45%.
Reverse flotation temperature described in step (3) is 28-32 DEG C.
PH value adjusting agent described in step (3) is NaOH, and NaOH addition is 1000g/t.
Inhibitor described in step (3) is cornstarch, and cornstarch addition is 600g/t.
Activator described in step (3) is CaO, and CaO addition is 200g/t.
Collecting agent described in step (3) is HLO2, and HLO2 addition is 300g/t.HLO2 is that Binzhou Guang Yuan Chemical Co., Ltd. produces.
The number of times of scanning described in step (3) is 3 times.
Generally the higher reverse flotation to iron ore concentrate of flotation temperature is more favourable.The collecting agent that reverse flotation uses is for anion collecting agent is in the time that concentration is higher, and anion collecting agent exists mainly with the form of molecular colloid greatly.The collecting agent concentration adding in reverse flotation process is higher, and collecting agent need to disperse in ore pulp, but the activity of the lower medicament of temperature is lower, is difficult for disperseing.The temperature of ore pulp is very large on mineral processing index impact, in the time that flotation temperature is lower (≤25 DEG C), the collecting ability of collecting agent a little less than.In the time that flotation temperature reaches 30 DEG C, the sorting index of flotation is comparatively desirable.But the too high cost that will increase ore dressing of flotation temperature, determining of flotation temperature should consider mineral processing index and beneficiation cost.Therefore 28-32 DEG C of flotation temperature selection is comparatively suitable.
The raising of reverse flotation pulp density, can increase the throughput of unit flotation volume, reduces dosing, affects the quality of iron ore concentrate but too high floatation concentration can reduce sorting index.The concentration of reverse flotation ore pulp is comparatively obvious on floatation indicators impact, along with the increase of pulp density, the productive rate of iron ore concentrate reduces gradually, the iron grade of concentrate raises, in the time that pulp density is greater than 50%, the productive rate of concentrate and iron yield decline very large, consider each mineral processing index, and selecting the concentration of ore pulp is that 40-45% is good.
The present invention compared with prior art, has following beneficial effect:
The present invention had both reduced pollution, had alleviated again mine tailing and had deposited the potential safety hazard of bringing, and had improved Business Economic Benefit, had improved social environment benefit, promoting enterprise and social sustainable development.
Brief description of the drawings
Fig. 1 is process chart of the present invention.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described further.
Embodiment 1
(1) after poor magnetic iron ore mine tailing dusting cover, adopt spiral chute to carry out gravity treatment, first roughly select again the selected gravity concentrate that obtains;
(2) gravity concentrate is through primary grinding, a stages of magnetic separation, secondary grinding and two stages of magnetic separation, obtaining magnetic concentrate and making concentration is 40% ore pulp, primary grinding granularity is-0.076mm85%, one stages of magnetic separation magnetic field intensity is 318.47KA/m, secondary grinding granularity is-0.045mm85% that two stages of magnetic separation magnetic field intensities are 159.47KA/m;
(3) in ore pulp, add 1000g/t NaOH, 600g/t cornstarch, 200g/t CaO and 300g/t HLO2 to carry out reverse flotation, reverse flotation temperature is 30 DEG C, first roughly select and obtain roughly selecting concentrate and roughly select chats, roughly select selected concentrate and the chats of obtaining of concentrate, roughly selecting chats scans and obtains chats and mine tailing, scanning number of times is 3 times, and chats returns and carries out roughing flotation, and mine tailing returns and carries out secondary grinding.
Embodiment 2
(1) after poor magnetic iron ore mine tailing dusting cover, adopt spiral chute to carry out gravity treatment, first roughly select again the selected gravity concentrate that obtains;
(2) gravity concentrate is through primary grinding, a stages of magnetic separation, secondary grinding and two stages of magnetic separation, obtaining magnetic concentrate and making concentration is 45% ore pulp, primary grinding granularity is-0.076mm85%, one stages of magnetic separation magnetic field intensity is 318.47KA/m, secondary grinding granularity is-0.045mm85% that two stages of magnetic separation magnetic field intensities are 159.47KA/m;
(3) in ore pulp, add 1000g/t NaOH, 600g/t cornstarch, 200g/t CaO and 300g/t HLO2 to carry out reverse flotation, reverse flotation temperature is 28 DEG C, first roughly select and obtain roughly selecting concentrate and roughly select chats, roughly select selected concentrate and the chats of obtaining of concentrate, roughly selecting chats scans and obtains chats and mine tailing, scanning number of times is 3 times, and chats returns and carries out roughing flotation, and mine tailing returns and carries out secondary grinding.
Embodiment 3
(1) after poor magnetic iron ore mine tailing dusting cover, adopt spiral chute to carry out gravity treatment, first roughly select again the selected gravity concentrate that obtains;
(2) gravity concentrate is through primary grinding, a stages of magnetic separation, secondary grinding and two stages of magnetic separation, obtaining magnetic concentrate and making concentration is 42% ore pulp, primary grinding granularity is-0.076mm85%, one stages of magnetic separation magnetic field intensity is 318.47KA/m, secondary grinding granularity is-0.045mm85% that two stages of magnetic separation magnetic field intensities are 159.47KA/m;
(3) in ore pulp, add 1000g/t NaOH, 600g/t cornstarch, 200g/t CaO and 300g/t HLO2 to carry out reverse flotation, reverse flotation temperature is 32 DEG C, first roughly select and obtain roughly selecting concentrate and roughly select chats, roughly select selected concentrate and the chats of obtaining of concentrate, roughly selecting chats scans and obtains chats and mine tailing, scanning number of times is 3 times, and chats returns and carries out roughing flotation, and mine tailing returns and carries out secondary grinding.
Claims (10)
1. poor magnetic iron ore mine tailing weight-magnetic-floating combined mineral dressing technology, is characterized in that step is as follows:
(1) after poor magnetic iron ore mine tailing dusting cover, adopt spiral chute to carry out gravity treatment, first roughly select again the selected gravity concentrate that obtains;
(2) gravity concentrate, through primary grinding, a stages of magnetic separation, secondary grinding and two stages of magnetic separation, obtains magnetic concentrate and makes ore pulp;
(3) in ore pulp, add pH value adjusting agent, inhibitor, activator and collecting agent to carry out reverse flotation, first roughly select and obtain roughly selecting concentrate and roughly select chats, roughly select selected concentrate and the chats of obtaining of concentrate, roughly selecting chats scans and obtains chats and mine tailing, chats returns and carries out roughing flotation, and mine tailing returns and carries out secondary grinding.
2. poor magnetic iron ore mine tailing weight-magnetic according to claim 1-floating combined mineral dressing technology, is characterized in that the primary grinding granularity described in step (2) is-0.076mm85%, and a stages of magnetic separation magnetic field intensity is 318.47KA/m.
3. poor magnetic iron ore mine tailing weight-magnetic according to claim 1-floating combined mineral dressing technology, is characterized in that the secondary grinding granularity described in step (2) is-0.045mm85%, and two stages of magnetic separation magnetic field intensities are 159.47KA/m.
4. poor magnetic iron ore mine tailing weight-magnetic according to claim 1-floating combined mineral dressing technology, is characterized in that the pulp density described in step (2) is 40-45%.
5. poor magnetic iron ore mine tailing weight-magnetic according to claim 1-floating combined mineral dressing technology, is characterized in that the reverse flotation temperature described in step (3) is 28-32 DEG C.
6. poor magnetic iron ore mine tailing weight-magnetic according to claim 1-floating combined mineral dressing technology, is characterized in that the pH value adjusting agent described in step (3) is NaOH, and NaOH addition is 1000g/t.
7. poor magnetic iron ore mine tailing weight-magnetic according to claim 1-floating combined mineral dressing technology, is characterized in that the inhibitor described in step (3) is cornstarch, and cornstarch addition is 600g/t.
8. poor magnetic iron ore mine tailing weight-magnetic according to claim 1-floating combined mineral dressing technology, is characterized in that the activator described in step (3) is CaO, and CaO addition is 200g/t.
9. poor magnetic iron ore mine tailing weight-magnetic according to claim 1-floating combined mineral dressing technology, is characterized in that the collecting agent described in step (3) is HLO2, and HLO2 addition is 300g/t.
10. poor magnetic iron ore mine tailing weight-magnetic according to claim 1-floating combined mineral dressing technology, is characterized in that the number of times of scanning described in step (3) is 3 times.
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| CN201410213706.6A CN103949337A (en) | 2014-05-21 | 2014-05-21 | Lean magnetite tailings reselection, magnetic separation and flotation combined ore separation process |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107365904A (en) * | 2017-07-11 | 2017-11-21 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A kind of iron ore shaft roasting magnetic separation flotation tailing recycles technique |
| CN109046743A (en) * | 2018-07-20 | 2018-12-21 | 太原理工大学 | A kind of compound force field sorting machine and its method for separating for magnetic iron ore sorting |
| CN109201277A (en) * | 2018-09-20 | 2019-01-15 | 鞍钢集团矿业有限公司 | Technique is selected in a kind of Anshan type lean octahedral iron ore mine tailing high efficiente callback again |
| CN110465404A (en) * | 2018-05-09 | 2019-11-19 | 中国瑞林工程技术有限公司 | The method for handling carbonate containing iron selection tailings |
| CN111001492A (en) * | 2019-12-24 | 2020-04-14 | 湖南柿竹园有色金属有限责任公司 | Beneficiation method for efficiently recovering rubidium, tin and iron in mill tailings |
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| CN101491787A (en) * | 2008-01-25 | 2009-07-29 | 鞍钢集团矿业公司 | Pre-sieving technology added before flotation operation |
| CN102259059A (en) * | 2010-11-05 | 2011-11-30 | 鞍钢集团矿业公司 | Method for recycling iron concentrates from tailings in stage grinding, thickness sorting and gravity-magnetism-floatation procedures |
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Patent Citations (5)
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| CN1548234A (en) * | 2003-05-23 | 2004-11-24 | 鞍钢集团鞍山矿业公司研究所 | Ore dressing process of treating poor hematite |
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| CN102259059A (en) * | 2010-11-05 | 2011-11-30 | 鞍钢集团矿业公司 | Method for recycling iron concentrates from tailings in stage grinding, thickness sorting and gravity-magnetism-floatation procedures |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107365904A (en) * | 2017-07-11 | 2017-11-21 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A kind of iron ore shaft roasting magnetic separation flotation tailing recycles technique |
| CN107365904B (en) * | 2017-07-11 | 2019-01-25 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A kind of iron ore shaft roasting magnetic separation flotation tailing recycling technique |
| CN110465404A (en) * | 2018-05-09 | 2019-11-19 | 中国瑞林工程技术有限公司 | The method for handling carbonate containing iron selection tailings |
| CN109046743A (en) * | 2018-07-20 | 2018-12-21 | 太原理工大学 | A kind of compound force field sorting machine and its method for separating for magnetic iron ore sorting |
| CN109201277A (en) * | 2018-09-20 | 2019-01-15 | 鞍钢集团矿业有限公司 | Technique is selected in a kind of Anshan type lean octahedral iron ore mine tailing high efficiente callback again |
| CN111001492A (en) * | 2019-12-24 | 2020-04-14 | 湖南柿竹园有色金属有限责任公司 | Beneficiation method for efficiently recovering rubidium, tin and iron in mill tailings |
| CN111001492B (en) * | 2019-12-24 | 2021-08-03 | 湖南柿竹园有色金属有限责任公司 | Beneficiation method for efficiently recovering rubidium, tin and iron in mill tailings |
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Application publication date: 20140730 |