CN104722391A - Method for recycling low-concentration and micro-fine-particle hematite floatation tailings - Google Patents
Method for recycling low-concentration and micro-fine-particle hematite floatation tailings Download PDFInfo
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- CN104722391A CN104722391A CN201510094180.9A CN201510094180A CN104722391A CN 104722391 A CN104722391 A CN 104722391A CN 201510094180 A CN201510094180 A CN 201510094180A CN 104722391 A CN104722391 A CN 104722391A
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- concentration
- concentrate
- flotation
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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
- B03B7/00—Combinations of wet processes or apparatus with other processes or apparatus, e.g. for dressing ores or garbage
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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
- B03B1/00—Conditioning for facilitating separation by altering physical properties of the matter to be treated
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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
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
- B03D1/08—Subsequent treatment of concentrated product
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- Dispersion Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention relates to a method for recycling low-concentration and micro-fine-particle hematite floatation tailings. The method is characterized by including the following steps: 1, after the graded hematite floatation tailings are concentrated through a concentrator, bottom flow is fed into a tower grinder for ore grinding to form open-circuit grinded ore, and concentrator overflowing flow with the concentration ranging from 0.2% to 0.3% enters a tailing settling pond; 2, tower-grinder discharged ore with the content of 325-mesh-particle-size ore ranging from 90% to 95% is fed into a weak-magnetism grading part, weak-magnetism tailings are fed into a strong-magnetism grading part, and strong-magnetism tailings are discharged; 3, mixed-magnetism concentrates obtained by mixing strong-magnetism concentrates and weak-magnetism concentrates are fed into a concentration swirler; 4, roughing, concentrating and scavenging flotation-column reverse flotation technology is carried out on settled sand, obtained after concentration of the concentration swirler, with the concentration ranging from 55% to 60%, and concentration swirler overflowing flow with the particle sizes smaller than 10 micrometers and the concentration ranging from 7% to 8% enters the tailing settling pond; 5, the grade of the obtained flotation concentrates ranges from 64% to 66%, the grade of the tailings is lower than 13%, and the concentrate recycling rate is higher than 80%. By means of the method, the technology is short, the technological process is simple, the grade of the flotation tailings is effectively reduced, and the metal recycling rate is increased.
Description
Technical field
The invention belongs to technical field of beneficiation, particularly a kind of method reclaiming low concentration, Hematite flotation tailing.
Background technology
China's bloodstone ore reserve is enriched, the more ripe sorting process that it is core that present stage has been formed with " stage grinding, coarse and fine separation, weight-magnetic-floating combined process flow ", the basic exploitation main process difficult problem solving bloodstone.Iron concentrate grade after sorting can reach more than 67.5%, but the rate of recovery is relatively low.Flotation tailing Iron grade is high, more than 18%, and based on the loss of particulate, microfine.Due to higher fineness ability monomer dissociation generally need be milled to, in grinding process, there is the selective milling of quartz and iron-stone simultaneously, cause iron-stone finer, thus cause the loss of particulate iron larger, and concentration is on the low side in Tailings transportation process, increase the difficulty of hematite flotation mining tailing.
Through sorting the hematite flotation tailings concentration of process at 15%-20%, granularity is-200 order content 75%-80%, and grade is at 18%-22%.
China Patent Publication No. CN102806140A discloses one and " reclaims the method for the comprehensive mine tailing of bloodstone ", the method as shown in Figure 1, the bloodstone mine tailing that granularity is-200 order 65%-75% by the first step, grade is 10%-15% feeds cyclone, cyclone underflow feed tower mill carry out closed circuit grinding; Second step cyclone 90%-95%(-325 order) overflow to feed low intensity magnetic separation other, weakly magnetic tailings feeds high-intensity magnetic separation, and strong magnetic throws tail, and high intensity magnetic mineral forms mixed magnetic essence together with inferior fine magnetite concentrate; Mixed magnetic essence feeds and roughly selects flotation column by the 3rd step, and the underflow roughly selecting flotation column feeds selected flotation column, roughly selects flotation column foam and feeds and scan flotation column; The underflow of the selected flotation column of the 4th step be final concentrate grade at 64%-66%, selected flotation column foam returns roughly selects flotation column; The underflow that 5th step scans flotation column returns roughly selects flotation column, scans flotation column foam and strong magnetic tail ore deposit forms true tailings.But said method is also inadaptable for the mineral of process low concentration, microfine, and its main cause has 2 requirements:
1.. because original process lacks the adjustment to concentration, and the size of pulp density directly affects floatation indicators impact, when being that 15%-20% flotation tailing feeds in original process by concentration, because concentration is lower, and the equipment lacked in original process concentration adjustment, cause and float to concentration on the low side, affect flotation operation;
2.. because hematite flotation mine tailing granularity-200 order content 75%-80% is thinner at-200 order content 65%-75% than the selected material in CN102806140A, feed tower mill according to cyclone underflow and carry out closed circuit grinding, by the impact of cyclone classification efficiency, part ore particle will there will be overground problem, therefore, under selected material comparatively slice part, adopt cyclone underflow to feed tower mill and carry out closed circuit grinding and be not suitable with.
Summary of the invention
The object of the invention is by the research to low concentration, Hematite mine tailing technique, improve iron ore selective dissociation, improve Iron ore recovery rate, increase production and improve productivity, reduce tailings grade.
The present invention is realized by following technical proposals:
A kind of technique reclaiming low concentration, Hematite flotation tailing of the present invention, is characterized in that comprising the following steps:
1) through sorting the hematite flotation tailings concentration of process at 15%-20%, granularity-200 order content 75%-85%, grade is at the flotation tailing of 18%-22%, after thickener is concentrated, underflow density is at 35%-40%, feed tower mill and carry out ore grinding, form open-circuit grinding, concentration is that the thickener overflow of 0.2%-0.3% then enters clarification pond;
2) by granularity be that the tower mill ore discharge of-325 order content 90%-95% feeds low intensity magnetic separation other, weakly magnetic tailings feeds high-intensity magnetic separation, and tail is thrown in strong magnetic tail ore deposit;
3) high intensity magnetic mineral and inferior fine magnetite concentrate are mixed together as concentration is at the mixed magnetic concentrate of 15%-20%, and mixed magnetic concentrate is fed concentrate cyclone;
4) concentration after being concentrated by concentrate cyclone reaches the sand setting of 55%-60%, and to one thick, an essence, sweep flotation column reverse floatation process, granularity is 10 μm, concentration be 7%-8% concentrate cyclone overflow then overflow enter clarification pond;
5) concentrate roughly selecting flotation column feeds selected flotation column, the mine tailing roughly selecting flotation column feeds scans flotation column, the mine tailing of selected flotation column turns back to the concentrate scanning flotation column roughly selects flotation column, the concentrate of selected flotation column is final flotation concentrate, grade reaches 64%-66%, the mine tailing scanning flotation column is true tailings, and its grade is lower than 13%, and the concentrate rate of recovery is more than 80%.
Compared with existing technology, the present invention possesses following advantage:
1, adopt open circuit tower mill to microfine mine tailing, avoid and cause ore overground because classification efficiency is low, microfine repeats the problem of ore grinding and then argillization phenomenon;
2, before tower mill and increase concentrator before flotation, effectively can adjust concentration, enhance flow process to low concentration to the adaptability in ore deposit, ore grinding and flotation effect can be guaranteed;
3, front the concentrating of flotation has desliming effect concurrently, avoids the impact of thin mud on flotation flowsheet;
4, owing to have employed concentrated to low concentration ore pulp, reduce pulp volume amount, equipment can be reduced and start number of units, energy-saving and cost-reducing, or increase flow processing ability, reduce processed in units cost;
5, after improving floatation concentration, can unit consumption of medicine be reduced, extend flotation time, optimize floatation indicators.
The present invention has that technique is short, flow process is simple, saves floor occupying area, can effectively reduce flotation tailing grade, reduces metal loss, improves iron ore selective dissociation, effectively improves Iron ore recovery rate simultaneously, increases production and improves productivity, reduce tailings grade.
Accompanying drawing explanation
Fig. 1 is the process chart of the present invention of the comprehensive mine tailing of former recovery bloodstone.
Fig. 2 is the process chart of recovery low concentration of the present invention, Hematite flotation tailing.
Detailed description of the invention
Below in conjunction with accompanying drawing, the invention will be further described.
A kind of technique reclaiming low concentration, Hematite flotation tailing of the present invention, is characterized in that comprising the following steps:
1) through sorting the concentration of process at 15%-20%, granularity-200 order content 75%-85%, grade is at the hematite flotation mine tailing of 18%-22%, after thickener is concentrated, underflow density is at 35%-40%, feed tower mill and carry out ore grinding, form open-circuit grinding, concentration is that the thickener overflow of 0.2%-0.3% then enters clarification pond;
Adopt thickener and tower to grind the open-circuit grinding combined, by thickener, low concentration flotation tailing is concentrated into 35%-40% by 15%-20%, for back segment magnetic-flotation ore deposit provides good condition;
2) by granularity be that the tower mill ore discharge of-325 order content 90%-95% feeds low intensity magnetic separation other, weakly magnetic tailings feeds high-intensity magnetic separation, and tail is thrown in strong magnetic tail ore deposit;
3) high intensity magnetic mineral and inferior fine magnetite concentrate are mixed together as concentration is at the mixed magnetic concentrate of 15%-20%, and mixed magnetic concentrate is fed concentrate cyclone;
4) concentration after being concentrated by concentrate cyclone reaches the sand setting of 55%-60%, and to one thick, an essence, sweep flotation column reverse floatation process, granularity is less than 10 μm, concentration be 7%-8% concentrate cyclone overflow then overflow enter clarification pond;
Concentrate cyclone is adopted because the present invention mixes magnetic concentrate in process magnetic separation, concentrate cyclone is as the novel concentrator of one, this concentrator has compared with traditional thickener equipment that floor space is little, sand setting thickening efficiency is high, tested to ore deposit by variable concentrations, the product that sand setting concentration is 55%-60%, effluent concentration 7%-8% can be obtained.
Table 1 difference concentrates index to the concentrate cyclone under the condition of ore deposit
5) concentrate roughly selecting flotation column feeds selected flotation column, the mine tailing roughly selecting flotation column feeds scans flotation column, the mine tailing of selected flotation column turns back to the concentrate scanning flotation column roughly selects flotation column, the concentrate of selected flotation column is final flotation concentrate, grade reaches 64%-66%, the mine tailing scanning flotation column is true tailings, and its grade is lower than 13%, and the concentrate rate of recovery is more than 80%.
The present invention provides new selecting process for flotation tailing reclaims, for waste resource recycling provides new method.
Claims (1)
1. reclaim a method for low concentration, Hematite flotation tailing, it is characterized in that comprising the following steps:
1) through sorting the concentration of process at 15%-20%, granularity-200 order content 75%-85%, grade is at the hematite flotation mine tailing of 18%-22%, after thickener is concentrated, underflow density is at 35%-40%, feed tower mill and carry out ore grinding, form open-circuit grinding, concentration is that the thickener overflow of 0.2%-0.3% then enters clarification pond;
2) by granularity be that the tower mill ore discharge of-325 order content 90%-95% feeds low intensity magnetic separation other, weakly magnetic tailings feeds high-intensity magnetic separation, and tail is thrown in strong magnetic tail ore deposit;
3) high intensity magnetic mineral and inferior fine magnetite concentrate are mixed together as concentration is at the mixed magnetic concentrate of 15%-20%, and mixed magnetic concentrate is fed concentrate cyclone;
4) concentration after being concentrated by concentrate cyclone reaches the sand setting of 55%-60%, and to one thick, an essence, sweep flotation column reverse floatation process, granularity is less than 10 μm, concentration be 7%-8% concentrate cyclone overflow then overflow enter clarification pond;
5) concentrate roughly selecting flotation column feeds selected flotation column, the mine tailing roughly selecting flotation column feeds scans flotation column, the mine tailing of selected flotation column turns back to the concentrate scanning flotation column roughly selects flotation column, the concentrate of selected flotation column is final flotation concentrate, grade reaches 64%-66%, the mine tailing scanning flotation column is true tailings, and its grade is lower than 13%, and the concentrate rate of recovery is more than 80%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510094180.9A CN104722391A (en) | 2015-03-04 | 2015-03-04 | Method for recycling low-concentration and micro-fine-particle hematite floatation tailings |
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| CN201510094180.9A CN104722391A (en) | 2015-03-04 | 2015-03-04 | Method for recycling low-concentration and micro-fine-particle hematite floatation tailings |
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| CN104722391A true CN104722391A (en) | 2015-06-24 |
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| CN201510094180.9A Pending CN104722391A (en) | 2015-03-04 | 2015-03-04 | Method for recycling low-concentration and micro-fine-particle hematite floatation tailings |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105944812A (en) * | 2016-05-17 | 2016-09-21 | 莫文丛 | Separation technology capable of solving mineral derichment problem in grinding and classification system |
| CN108380397A (en) * | 2018-05-17 | 2018-08-10 | 中国矿业大学 | A kind of recovery method of low concentration calcite type containing mica fluorite tailing |
| CN109225607A (en) * | 2018-09-18 | 2019-01-18 | 湖南柿竹园有色金属有限责任公司 | A kind of method of iron ore concentrate reverse flotation |
| CN112844806A (en) * | 2020-12-21 | 2021-05-28 | 鞍钢集团矿业有限公司 | Ultra-fine grinding dispersion flotation process for strong magnetic hematite tailings |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1908207A (en) * | 2006-08-18 | 2007-02-07 | 昆明理工大学 | Method of comprehensive utilizing iron making blast furnace dust resources |
| RU2427430C1 (en) * | 2010-04-08 | 2011-08-27 | Открытое акционерное общество "Михайловский ГОК" | Method of extracting haematite from composite iron ore wet magnetic separation tailings |
| CN102259052A (en) * | 2010-10-30 | 2011-11-30 | 鞍钢集团矿业公司 | Process for re-cleaning reverse flotation tailings of hematite |
| CN102259053A (en) * | 2010-10-30 | 2011-11-30 | 鞍钢集团矿业公司 | Method for recovering iron resources in reverse flotation tailings |
| CN104148172A (en) * | 2014-07-28 | 2014-11-19 | 鞍钢集团矿业公司 | Respective grinding and strong magnetic-reverse flotation recovery process of hematite tailings |
-
2015
- 2015-03-04 CN CN201510094180.9A patent/CN104722391A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1908207A (en) * | 2006-08-18 | 2007-02-07 | 昆明理工大学 | Method of comprehensive utilizing iron making blast furnace dust resources |
| RU2427430C1 (en) * | 2010-04-08 | 2011-08-27 | Открытое акционерное общество "Михайловский ГОК" | Method of extracting haematite from composite iron ore wet magnetic separation tailings |
| CN102259052A (en) * | 2010-10-30 | 2011-11-30 | 鞍钢集团矿业公司 | Process for re-cleaning reverse flotation tailings of hematite |
| CN102259053A (en) * | 2010-10-30 | 2011-11-30 | 鞍钢集团矿业公司 | Method for recovering iron resources in reverse flotation tailings |
| CN104148172A (en) * | 2014-07-28 | 2014-11-19 | 鞍钢集团矿业公司 | Respective grinding and strong magnetic-reverse flotation recovery process of hematite tailings |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105944812A (en) * | 2016-05-17 | 2016-09-21 | 莫文丛 | Separation technology capable of solving mineral derichment problem in grinding and classification system |
| CN108380397A (en) * | 2018-05-17 | 2018-08-10 | 中国矿业大学 | A kind of recovery method of low concentration calcite type containing mica fluorite tailing |
| CN109225607A (en) * | 2018-09-18 | 2019-01-18 | 湖南柿竹园有色金属有限责任公司 | A kind of method of iron ore concentrate reverse flotation |
| CN112844806A (en) * | 2020-12-21 | 2021-05-28 | 鞍钢集团矿业有限公司 | Ultra-fine grinding dispersion flotation process for strong magnetic hematite tailings |
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Address after: 114001 Anshan District, Liaoning, No. 219 Road, No. 39, Tiedong Applicant after: Anshan Iron and Steel Group Mining Co., Ltd. Address before: 114001 Anshan District, Liaoning, No. 219 Road, No. 39, Tiedong Applicant before: Angang Group Mine Company |
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Application publication date: 20150624 |
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