CN104475232A - Iron ore tailing discarding pre-concentration technology - Google Patents
Iron ore tailing discarding pre-concentration technology Download PDFInfo
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- CN104475232A CN104475232A CN201410639754.1A CN201410639754A CN104475232A CN 104475232 A CN104475232 A CN 104475232A CN 201410639754 A CN201410639754 A CN 201410639754A CN 104475232 A CN104475232 A CN 104475232A
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- ores
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 36
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 18
- 238000005516 engineering process Methods 0.000 title abstract description 6
- 238000004094 preconcentration Methods 0.000 title abstract 5
- 238000000034 method Methods 0.000 claims abstract description 53
- 239000012141 concentrate Substances 0.000 claims abstract description 35
- 238000007885 magnetic separation Methods 0.000 claims description 10
- 230000018044 dehydration Effects 0.000 claims description 9
- 238000006297 dehydration reaction Methods 0.000 claims description 9
- 238000013467 fragmentation Methods 0.000 claims description 9
- 238000006062 fragmentation reaction Methods 0.000 claims description 9
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 claims description 6
- 230000008719 thickening Effects 0.000 claims description 6
- 239000002893 slag Substances 0.000 claims description 5
- 229920002635 polyurethane Polymers 0.000 claims description 4
- 239000004814 polyurethane Substances 0.000 claims description 4
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 3
- 239000011707 mineral Substances 0.000 claims description 3
- 239000002516 radical scavenger Substances 0.000 claims description 3
- 239000004744 fabric Substances 0.000 claims description 2
- 238000005265 energy consumption Methods 0.000 abstract description 6
- 238000012216 screening Methods 0.000 abstract 4
- 230000000630 rising effect Effects 0.000 abstract 1
- 230000002000 scavenging effect Effects 0.000 abstract 1
- 238000005406 washing Methods 0.000 abstract 1
- 239000002699 waste material Substances 0.000 abstract 1
- 239000011435 rock Substances 0.000 description 4
- 239000004035 construction material Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000005188 flotation Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000010334 sieve classification Methods 0.000 description 1
Classifications
-
- 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
-
- 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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- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention relates to an iron ore tailing discarding pre-concentration technology. The iron ore tailing discarding pre-concentration technology includes: performing ore washing operation on ores after being smashed, grading the ores into three grain levels of 50-20mm, 20-2mm and 2-0mm, using a dry magnetic drum to screen the ores of the 50-20mm grain level, enabling finished ores screened out from the ores of the 50-20mm grain level to enter a fine crushing process, enabling tailing ores screened out from the ores of the 50-20mm grain level to enter a jigging machine for screening, enabling finished ores screened out from the tailing ores through the jigging machine to enter the fine crushing process, and enabling the remaining tail ores to form dry tailings; screening the ores of the 20-2mm grain level through a dry magnetic pulley, using a magnetic field 2500Oe in intensity, enabling finished ores screened out from the ores of the 20-2mm grain level to enter the fine crushing process, enabling tailing ores screened out from the cores of the 20-2mm grain level to enter a roller type strong magnetic rough concentration process, rising the intensity of the magnetic field to 7000Oe, enabling roughing finished ores to enter the fine crushing process, enabling the tailing ores of the ores of the 20-2mm grain level to enter a roller type strong magnetic scavenging process, enabling finished ores scavenged from the tailing ores of the ores of the 20-2mm grain level to enter the fine crushing process, and enabling the scavenged finished ores to form another dry tailings; using a 5M cone funnel to concentrate the ores of the 2-0mm grain level, grading the ores of the 2-0mm grain level into two grain levels of 2-0.5mm and 0-0.5mm, and then respectively processing the ores of the 2-0.5mm grain level and the 0-0.5mm level. The iron ore tailing discarding pre-concentration technology reduces the amount of waste ores which enter an ore screening process and ore screening energy consumption, achieves the concept of more crashing and less grinding, and achieves pre-concentration of tailing discarding.
Description
Technical field
The present invention relates to a kind of iron ore process for discarding tailings in advance, be applicable to metallurgical mine field, throw except barren rock before sorting, reduce selected ettle amount.
Background technology
In ore dressing plant, broken ore grinding energy ezpenditure accounts for nearly 70% of whole ore dressing plant energy consumption, and " much broken and lessmill, throw tail in advance " is the target that metallurgical mine industry is pursued always, reduce enter fragmentation, the ore amount of ore grinding is the effective ways reducing energy consumption.In selecting and purchasing flow process, more early realize throwing tail, more can reduce and sort cost.Beneficiation flowsheet, by after ore extraction, generally first through coarse crushing, after being crushed to certain particle size, is sent in stope.After ore enters beneficiation flowsheet, generally first carry out fragmentation, after being crushed to mill feed size, carry out ore grinding and sorting operation.After ore after fragmentation is carried out classification by some ore dressing plants, fine fraction directly carries out sorting operation, reduce into mill amount, achieve to a certain extent " much broken and lessmill ", ore through in after fragmentation-ultrafine grinding flow process, after using vibratory sieve classification, fine fraction directly adopts low intensity magnetic separation to sort, and decreases ore grinding amount.And the ore thinner to some disseminated grain sizes, the method all entering fragmentation-grinding operation is then selected in some ore dressing plants, and cause ratio of concentration comparatively large, Gao Shihui reaches more than 4.0, grinding system adopts stage grinding, thickness grading, Gravity separation high intensity magnetic separation reverse flotation flow process, and ore dressing energy consumption is higher.
Tail, " much broken and lessmill " are thrown in realization as early as possible, more and more come into one's own, under the market prospects of iron ore concentrate price continued downturn, reduce beneficiation cost, it is the unique channel realizing performance of enterprises target, and to reduce ratio of concentration be reduce costs most effective measures, therefore throw tail technology in advance and technique receives much concern.
Summary of the invention
The invention provides a kind of iron ore process for discarding tailings in advance, reduce the barren rock amount and the ore dressing energy consumption that enter beneficiation flowsheet, realize much broken and lessmill, throw tail in advance.
For achieving the above object, the present invention by the following technical solutions: a kind of iron ore process for discarding tailings in advance, the ore after middle fragmentation is carried out washup operation, and ore is divided into 50 ~ 20mm, 20 ~ 2mm and 2 ~ 0mm tri-grades, wherein
(1) 50 ~ 20mm grade ore adopts dry magnet drum to sort; sort concentrate and enter flow process in small, broken bits through belt-conveying; sort mine tailing and enter YMT-75 coarsegrain jig concentration through belt-conveying, the concentrate after jig concentration enters fine crushing flow process, and the mine tailing after jig concentration forms dry tail; The magnetic field intensity of described dry magnet drum is 3000Oe;
(2) 20 ~ 2mm grade ores sort through overdrying magnetic pulley, and described dry magnetic pulley magnetic field intensity is 2500Oe, sorts concentrate and enters flow process in small, broken bits, and sort mine tailing and enter the strong magnetic of roll-type and roughly select flow process, the magnetic field intensity that the strong magnetic of wherein said roll-type is roughly selected is 7000Oe; Rougher concentration enters flow process in small, broken bits, and rougher tailings enters the strong magnetic of roll-type and scans flow process, and scavenger concentrate enters fine crushing flow process, scans mine tailing and forms dry tail; The magnetic field intensity that wherein the strong magnetic of roll-type is scanned is 8000Oe;
(3) 2 ~ 0mm grade ores are concentrated through 5M cone bucket, wherein 2 ~ 0.5mm grade enters the other flow process of low intensity magnetic separation through 5M cone bucket underflow, inferior fine magnetite concentrate enters flow process in small, broken bits after dehydration, weakly magnetic tailings enters middle magnetic Beneficiation flowsheet, middle magnetic concentrate enters flow process in small, broken bits after spiral classifier dehydration, and middle magnetic tail ore deposit forms wet tail after spiral classifier dehydration; 0 ~ 0.5mm grade enters the concentrated large well of diameter 50m through the overflow of 5M cone bucket, large shaft bottom flows to into the other flow process of low intensity magnetic separation, inferior fine magnetite concentrate enters the large well of concentrate, Iron concentrate is formed after thickening, weakly magnetic tailings, through after slag, enters high-intensity magnetic separation flow process, and high intensity magnetic mineral enters the large well of concentrate, form Iron concentrate after thickening, Tailings Dam is sent in strong magnetic tail ore deposit after concentrated; The magnetic field intensity of wherein said weak magnetic is 2000Oe, and the magnetic field intensity of middle magnetic is 3000Oe, and the magnetic field intensity of strong magnetic is 7000Oe.
Described washup operation uses double-deck linear vibrating screen, and upper strata adopts φ 20mm polyurethane sieve plate, and lower floor adopts φ 2mm polyurethane bar shaped screen cloth.
High frequency fine screen is adopted every slag equipment before 0 ~ 0.5mm grade high intensity magnetic separation.
The beneficial effect that the present invention reaches: (1) realizes " throwing tail in advance ", reduces the barren rock amount and ore dressing energy consumption that enter beneficiation flowsheet; (2) according to barren rock feature, form different product, make rational use of resources, obtain the maximization of benefit; (3) decrease the true tailings amount that ore-dressing practice produces, saved Tailings Dam, accomplished the green management in mine; (4) Partial Jobs have employed unconventional equipment, improves efficiency, reduces equipment failure rate.
Detailed description of the invention
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with embodiment, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
Embodiment 1
The 30mm grade ore that after middle fragmentation, washup obtains adopts dry magnet drum to sort, and the magnetic field intensity of dry magnet drum is 3000Oe.Sort concentrate and enter flow process in small, broken bits through belt-conveying, sort mine tailing and enter YMT-75 coarsegrain jig concentration through belt-conveying, the concentrate after jig concentration enters fine crushing flow process, and the mine tailing after jig concentration forms dry tail and sells as construction material.
Embodiment 2
The 10mm grade ore that after middle fragmentation, washup obtains sorts through overdrying magnetic pulley, described dry magnetic pulley magnetic field intensity is 2500Oe; sort concentrate and enter flow process in small, broken bits, and sort mine tailing and enter the strong magnetic of roll-type and roughly select flow process, the magnetic field intensity that wherein the strong magnetic of roll-type is roughly selected is 7000Oe; Rougher concentration enters flow process in small, broken bits, and rougher tailings enters the strong magnetic of roll-type and scans flow process, and scavenger concentrate enters fine crushing flow process, scans mine tailing and forms dry tail and sell as construction material; The magnetic field intensity that wherein the strong magnetic of roll-type is scanned is 8000Oe.
Embodiment 3
The 1.5mm grade ore that after middle fragmentation, washup obtains is concentrated through 5M cone bucket, weak magnetic (2000Oe) Beneficiation flowsheet is entered by cone bucket underflow, inferior fine magnetite concentrate enters flow process in small, broken bits after dehydration, weakly magnetic tailings enters middle magnetic (3000Oe) Beneficiation flowsheet, middle magnetic concentrate enters flow process in small, broken bits after spiral classifier dehydration, and middle magnetic tail ore deposit forms wet tail and sells as construction material after spiral classifier dehydration.
Embodiment 4
The 0.3mm grade ore that after middle fragmentation, washup obtains is concentrated through 5M cone bucket, the concentrated large well that bucket overflow enters diameter 50m is bored by 5M, large shaft bottom flows to into weak magnetic (2000Oe) Beneficiation flowsheet, inferior fine magnetite concentrate enters the large well of concentrate, formed after thickening Iron concentrate sell, weakly magnetic tailings through high frequency fine screen after slag, enter strong magnetic (7000Oe) Beneficiation flowsheet, high intensity magnetic mineral enters the large well of concentrate, and form Iron concentrate after thickening and sell, Tailings Dam is sent in strong magnetic tail ore deposit after concentrated.
Be more than better embodiment of the present invention, but protection scope of the present invention is not limited thereto.Any those of ordinary skill in the art are in the technical scope disclosed by the present invention, and the conversion expected without creative work or replacement, all should be encompassed within protection scope of the present invention.Therefore the protection domain that protection scope of the present invention should limit with claim is as the criterion.
Claims (3)
1. an iron ore process for discarding tailings in advance, carries out washup operation by the ore after middle fragmentation, and ore is divided into 50 ~ 20mm, 20 ~ 2mm and 2 ~ 0mm tri-grades, it is characterized in that,
(1) 50 ~ 20mm grade ore adopts dry magnet drum to sort; sort concentrate and enter flow process in small, broken bits through belt-conveying; sort mine tailing and enter YMT-75 coarsegrain jig concentration through belt-conveying, the concentrate after jig concentration enters fine crushing flow process, and the mine tailing after jig concentration forms dry tail; The magnetic field intensity of described dry magnet drum is 3000Oe;
(2) 20 ~ 2mm grade ores sort through overdrying magnetic pulley, and described dry magnetic pulley magnetic field intensity is 2500 Oe, sorts concentrate and enters flow process in small, broken bits, and sort mine tailing and enter the strong magnetic of roll-type and roughly select flow process, the magnetic field intensity that the strong magnetic of wherein said roll-type is roughly selected is 7000Oe; Rougher concentration enters flow process in small, broken bits, and rougher tailings enters the strong magnetic of roll-type and scans flow process, and scavenger concentrate enters fine crushing flow process, scans mine tailing and forms dry tail; The magnetic field intensity that wherein the strong magnetic of roll-type is scanned is 8000Oe;
(3) 2 ~ 0mm grade ores are concentrated through 5M cone bucket, wherein 2 ~ 0.5mm grade enters the other flow process of low intensity magnetic separation through 5M cone bucket underflow, inferior fine magnetite concentrate enters flow process in small, broken bits after dehydration, weakly magnetic tailings enters middle magnetic Beneficiation flowsheet, middle magnetic concentrate enters flow process in small, broken bits after spiral classifier dehydration, and middle magnetic tail ore deposit forms wet tail after spiral classifier dehydration; 0 ~ 0.5mm grade enters the concentrated large well of diameter 50m through the overflow of 5M cone bucket, large shaft bottom flows to into the other flow process of low intensity magnetic separation, inferior fine magnetite concentrate enters the large well of concentrate, Iron concentrate is formed after thickening, weakly magnetic tailings, through after slag, enters high-intensity magnetic separation flow process, and high intensity magnetic mineral enters the large well of concentrate, form Iron concentrate after thickening, Tailings Dam is sent in strong magnetic tail ore deposit after concentrated; The magnetic field intensity of wherein said weak magnetic is 2000Oe, and the magnetic field intensity of middle magnetic is 3000Oe, and the magnetic field intensity of strong magnetic is 7000Oe.
2. iron ore according to claim 1 process for discarding tailings in advance, is characterized in that, described washup operation uses double-deck linear vibrating screen, and upper strata adopts φ 20mm polyurethane sieve plate, and lower floor adopts φ 2mm polyurethane bar shaped screen cloth.
3. iron ore according to claim 1 process for discarding tailings in advance, is characterized in that, adopts high frequency fine screen before 0 ~ 0.5mm grade high intensity magnetic separation every slag equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410639754.1A CN104475232A (en) | 2014-11-14 | 2014-11-14 | Iron ore tailing discarding pre-concentration technology |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410639754.1A CN104475232A (en) | 2014-11-14 | 2014-11-14 | Iron ore tailing discarding pre-concentration technology |
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| Publication Number | Publication Date |
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| CN104475232A true CN104475232A (en) | 2015-04-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410639754.1A Pending CN104475232A (en) | 2014-11-14 | 2014-11-14 | Iron ore tailing discarding pre-concentration technology |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109894255A (en) * | 2017-12-11 | 2019-06-18 | 南京梅山冶金发展有限公司 | A kind of method of magnetic heavy industry skill sorting bulk compound iron ore |
| CN114247555A (en) * | 2021-12-22 | 2022-03-29 | 武钢资源集团金山店矿业有限公司 | Crushing and grinding magnetic separation treatment process for iron ore |
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2014
- 2014-11-14 CN CN201410639754.1A patent/CN104475232A/en active Pending
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109894255A (en) * | 2017-12-11 | 2019-06-18 | 南京梅山冶金发展有限公司 | A kind of method of magnetic heavy industry skill sorting bulk compound iron ore |
| CN114247555A (en) * | 2021-12-22 | 2022-03-29 | 武钢资源集团金山店矿业有限公司 | Crushing and grinding magnetic separation treatment process for iron ore |
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Application publication date: 20150401 |