CN108480034A - A kind of method of magnetic-weight combined mineral dressing technology recycling magnetic tailing - Google Patents
A kind of method of magnetic-weight combined mineral dressing technology recycling magnetic tailing Download PDFInfo
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- CN108480034A CN108480034A CN201810187057.5A CN201810187057A CN108480034A CN 108480034 A CN108480034 A CN 108480034A CN 201810187057 A CN201810187057 A CN 201810187057A CN 108480034 A CN108480034 A CN 108480034A
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- Prior art keywords
- magnetic
- centrifuge
- tailing
- concentrate
- drum
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Classifications
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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
-
- 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
- B03B9/00—General arrangement of separating plant, e.g. flow sheets
-
- 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
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C1/00—Magnetic separation
- B03C1/02—Magnetic separation acting directly on the substance being separated
- B03C1/10—Magnetic separation acting directly on the substance being separated with cylindrical material carriers
Abstract
The present invention relates to a kind of magnetic reconnections to close the method that ore-dressing technique recycles magnetic tailing, including lower step：It is 10 ~ 12% by Iron grade, the magnetic tailing that magnetic iron content is 1 ~ 3%, feed one section of drum magnetic separator, one magnetic essence feeds the closed circuit grinding of cyclone and tower grinding machine composition, granularity is that the closed circuit grinding overflow product of 0.046mm contents 90% ~ 95% feeds two sections of drum magnetic separators, two magnetic essences feed the one thick one single-minded centrifuge reselection operation flow swept, and the concentrate of selected centrifuge is final concentrate, and the tailing and a magnetic tail, two magnetic tails for scanning centrifuge merge into true tailings；For final concentrate grade 65% or more, true tailings grade is 7.5% ~ 9.5%, it is an advantage of the invention that：1）It realizes and recycles iron ore concentrate from the thinner magnetic tailing of valuable mineral disseminated grain size, magnetic iron content is less than 0.5% in a magnetic tail；2）Magnetic heavy industry skill, which can reduce, regrinds granularity 5 10%, improves 13 percentage points of concentrate grade.
Description
Technical field
The invention belongs to technical field of beneficiation, and in particular to valuable mineral disseminated grain size in 30 microns or less magnetic tailings
A kind of method of the magnetic sorted-weight combined mineral dressing technology recycling magnetic tailing.
Background technology
The method that magnetic tailing of the valuable mineral based on Armco magnetic iron mineral is recycled at present, it is common that use magnetic
Choosing-dusting cover-magnetic separation process or single magnetic separation process are sorted, and are returned to the Armco magnetic iron mineral in magnetic tailing to reach
It receives, obtains the purpose of qualified iron ore concentrate.The selection of single magnetic separation process or magnetic separation-dusting cover-magnetic separation process is according to magnetic tailing
The size of middle Armco magnetic iron mineral disseminated grain size and determination, it is specifically described as follows：
Magnetic separation-dusting cover-magnetic separation process：
For Armco magnetic iron mineral disseminated grain size in magnetic tailing at 30 microns or more, regrind granularity -0.074mm contents 95% with
Under magnetic tailing, magnetic separation-dusting cover-magnetic separation process generally can be used, it is common that throwing tail is carried out using disc type recycling machine first, so
It after being regrinded afterwards to recycling machine concentrate, then carries out weak magnetic machine and sorts, weak magnetic machine concentrate feeds dusting cover, and dusting cover undersize passes through again
Become final concentrate after weak magnetic machine is selected, it is weak that the return of dusting cover oversize feeds weak magnetic machine-dusting cover-again after regrinding or individually regrinding
Magnetomechanical is sorted, and is constituted closed circuit；
Single magnetic separation process：
For Armco magnetic iron mineral disseminated grain size in magnetic tailing at 30 microns hereinafter, regrind granularity -0.046mm contents 90% with
On magnetic tailing, single magnetic separation process generally can be used, it is common that throwing tail is carried out using disc type recycling machine first, then to return
After receipts machine concentrate is regrinded, then is combined using multistage magnetic separator or dehydration slot and magnetic separator and sort acquisition concentrate.
For iron mineral disseminated grain size at 0 ~ 30 micron, iron minerals in magnetic separated gangues disseminated grain size is relatively very thin, regrinds
Granularity 90% or more -0.046mm contents fine-grained magnetite tailing, using single magnetic separation process or magnetic separation-dusting cover-magnetic separation work
The major defect that skill is sorted is：
1）Magnetic concentration working regrind granularity it is meticulous when be easy to cause magnetism and be mingled with, high-grade concentrate can not be obtained；2）Regrind granularity
It is meticulous, mutually in requisition for thinner dusting cover screen size, sieve pore blockade is easily caused in production；Otherwise, need lower dusting cover to
Mine concentration and larger flushing water, are not easy to realize in production.
In addition, being recycled to magnetic tailing using disc type recycling machine, although treating capacity is larger, and the rate of recovery is relatively low,
Magnetic iron content is still greater than 0.5% in disc type recycling machine tailing.
Invention content
The object of the present invention is to provide what is sorted in 30 microns of magnetic tailings below to valuable mineral disseminated grain size
A kind of method of magnetic-weight combined mineral dressing technology recycling magnetic tailing.
The invention is realized in this way.
A kind of method of magnetic of the present invention-weight combined mineral dressing technology recycling magnetic tailing, includes the following steps：
1）It is 10 ~ 12% by Iron grade, the magnetic tailing that magnetic iron content is 1 ~ 3% feeds one section that magnetic induction intensity is 400mT
Drum magnetic separator, one section of drum magnetic separator concentrate feed the closed circuit grinding system of cyclone and tower grinding machine composition, and particle size range is-
The closed circuit grinding system overflow product of 0.046mm grain size contents 90% ~ 95% feeds two sections of cartridge type magnetic that magnetic induction intensity is 250mT
Select machine；
2）Two sections of drum magnetic separator concentrate feed reselection operation, and reselection operation is the one thick one single-minded centrifuge Beneficiation flowsheet swept,
The Jing Kuang Give of roughing centrifuge enter selected centrifuge, and the concentrate of selected centrifuge is final concentrate, and the tailing of selected centrifuge returns
Return roughing centrifuge；The Wei Kuang Give of roughing centrifuge enter to scan centrifuge, and the concentrate for scanning centrifuge returns to roughing centrifuge, sweeps
The tailing of centrifuge and the tailing of the tailing of one section of drum magnetic separator, two sections of drum magnetic separators is selected to merge into true tailings；Finally
For concentrate grade 65% or more, true tailings grade is 7.5% ~ 9.5%.
Magnetic iron content is less than 0.5% in one magnetic tail.
It is an advantage of the invention that：
1）The present invention recycles iron ore concentrate from valuable mineral disseminated grain size in 30 microns of magnetic tailings below, using one section of cartridge type
Magnetic separator replaces disk recycling machine, and magnetic iron content in one section of drum magnetic separator tailing is made to be reduced to 0.5% hereinafter, improving money
Source utilization rate；
2）The present invention can reduce grinding particle size 5-10% by using magnetic separation with the process integration that gravity treatment is combined, and saving is produced into
This；The magnetic Inclusion Problem in single magnetic selection method is solved simultaneously, improves 1-3 percentage points of concentrate grade.
Description of the drawings
Fig. 1 is the method flow diagram that a kind of magnetic-weight combined mineral dressing technology recycles magnetic tailing.
Specific implementation mode
The invention will be further described with reference to the accompanying drawings and examples.
As shown in Figure 1,
Embodiment one
A kind of method of magnetic of the present invention-weight combined mineral dressing technology recycling magnetic tailing, includes the following steps：
1）It is 10.04% by Iron grade, the magnetic tailing that magnetic iron content is 1.65% feeds one that magnetic induction intensity is 400mT
Section drum magnetic separator, one section of drum magnetic separator concentrate feed the closed circuit grinding system of cyclone and tower grinding machine composition, particle size range
Two sections of drum magnetic separators that magnetic induction intensity is 250mT are fed for the closed circuit grinding system overflow product of -0.046mm contents 90%；
2）Two sections of drum magnetic separator concentrate feed reselection operation, and reselection operation is the one thick one single-minded centrifuge Beneficiation flowsheet swept,
The concentrate of roughing centrifuge feeds selected centrifuge, and the concentrate for the selected centrifuge that grade is 65.53% is final concentrate, selected
The tailing of centrifuge returns to roughing centrifuge；The Wei Kuang Give of roughing centrifuge enter to scan centrifuge, and the concentrate for scanning centrifuge returns
Roughing centrifuge is returned, the tailing for scanning centrifuge merges with the tailing of the tailing of one section of drum magnetic separator, two sections of drum magnetic separators
As true tailings, true tailings grade is 8.67%.
Magnetic iron content is 0.40% in one section of drum magnetic separator tailing.
Roughing centrifuge revolution is 450 revs/min, and feed ore concentration is 10% ~ 15%；Selected centrifuge revolution is 300 revs/min,
Feed ore concentration is 6% ~ 10%；It is 500 revs/min to scan centrifuge revolution, and feed ore concentration is 12% ~ 18%.
Embodiment two：
1）It is 10.86% by Iron grade, the magnetic tailing that magnetic iron content is 2.25% feeds one that magnetic induction intensity is 400mT
Section drum magnetic separator, one section of drum magnetic separator concentrate feed the closed circuit grinding system of cyclone and tower grinding machine composition, particle size range
Two sections of cartridge type magnetic separation that magnetic induction intensity is 250mT are fed for the closed circuit grinding system overflow product of -0.046mm contents 91.5%
Machine；
2）Two sections of drum magnetic separator concentrate feed reselection operation, and reselection operation is the one thick one single-minded centrifuge Beneficiation flowsheet swept,
The Jing Kuang Give of roughing centrifuge enter selected centrifuge, and the concentrate for the selected centrifuge that grade is 66.35% is final concentrate, selected
The tailing of centrifuge returns to roughing centrifuge；The Wei Kuang Give of roughing centrifuge enter to scan centrifuge, and the concentrate for scanning centrifuge returns
Roughing centrifuge is returned, the tailing for scanning centrifuge merges with the tailing of the tailing of one section of drum magnetic separator, two sections of drum magnetic separators
As true tailings, true tailings grade is 8.91%.
Magnetic iron content is 0.45% in one section of drum magnetic separator tailing.
Roughing centrifuge revolution is 450 revs/min, and feed ore concentration is 10% ~ 15%；Selected centrifuge revolution is 300 revs/min,
Feed ore concentration is 6% ~ 10%；It is 500 revs/min to scan centrifuge revolution, and feed ore concentration is 12% ~ 18%.
Claims (2)
1. a kind of method of magnetic-weight combined mineral dressing technology recycling magnetic tailing, it is characterised in that including lower step：
1）It is 10 ~ 12% by Iron grade, the magnetic tailing that magnetic iron content is 1 ~ 3% feeds one section of drum magnetic separator, one section of cartridge type
Magnetic separator concentrate feeds the closed circuit grinding system of cyclone and tower grinding machine composition, and particle size range is -0.046mm contents 90% ~ 95%
Closed circuit grinding system overflow product feed two sections of drum magnetic separators；
2）Two sections of drum magnetic separator concentrate feed reselection operation, and reselection operation is the one thick one single-minded centrifuge Beneficiation flowsheet swept,
The Jing Kuang Give of roughing centrifuge enter selected centrifuge, and the concentrate of selected centrifuge is final concentrate, and the tailing of selected centrifuge returns
Return roughing centrifuge；The Wei Kuang Give of roughing centrifuge enter to scan centrifuge, and the concentrate for scanning centrifuge returns to roughing centrifuge, sweeps
The tailing of centrifuge and the tailing of the tailing of one section of drum magnetic separator, two sections of drum magnetic separators is selected to be incorporated as true tailings；Most
Whole concentrate grade is 65% or more, true tailings grade 7.5% ~ 9.5%.
2. the method for single magnetic separation process recycling magnetic tailing according to claim 1, it is characterised in that described one section
The magnetic induction intensity of drum magnetic separator is 400mT, in one section of drum magnetic separator tailing magnetic iron content 0.50% hereinafter, described
Two sections of drum magnetic separators magnetic induction intensity be 250mT.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810187057.5A CN108480034A (en) | 2018-03-07 | 2018-03-07 | A kind of method of magnetic-weight combined mineral dressing technology recycling magnetic tailing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810187057.5A CN108480034A (en) | 2018-03-07 | 2018-03-07 | A kind of method of magnetic-weight combined mineral dressing technology recycling magnetic tailing |
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| Publication Number | Publication Date |
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| CN108480034A true CN108480034A (en) | 2018-09-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810187057.5A Withdrawn CN108480034A (en) | 2018-03-07 | 2018-03-07 | A kind of method of magnetic-weight combined mineral dressing technology recycling magnetic tailing |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112844807A (en) * | 2020-12-21 | 2021-05-28 | 鞍钢集团矿业有限公司 | Magnetic-gravity combined recleaning process for micro-fine particle hematite strong magnetic tailings |
Citations (7)
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|---|---|---|---|---|
| CN102430468A (en) * | 2011-09-19 | 2012-05-02 | 鞍钢集团矿业公司 | Magnetism-gravity combined separation technology for magnetic hematite mixed type rough concentrate |
| CN102921540A (en) * | 2012-11-16 | 2013-02-13 | 鞍钢集团矿业公司 | Lean hematite processing technology |
| CN104148165A (en) * | 2014-07-28 | 2014-11-19 | 鞍钢集团矿业公司 | Process for separate grinding and centrifugal recycling of hematite tailings |
| CN104888947A (en) * | 2015-06-12 | 2015-09-09 | 鞍钢集团矿业公司 | Magnetic separation-centrifuge separation technology of micro-fine particle dissemination magnet-hematite mixed ore |
| CN104923386A (en) * | 2015-06-12 | 2015-09-23 | 鞍钢集团矿业公司 | Micro-fine disseminated mixed ore coarse size preconcentrating and magnetic-gravitational separating process |
| CN106513163A (en) * | 2016-10-14 | 2017-03-22 | 鞍钢集团矿业有限公司 | High-pressure rolling and magnetic-gravity separation process for lean hematite |
| CN107597430A (en) * | 2017-08-28 | 2018-01-19 | 鞍钢集团矿业有限公司 | A kind of magnetic reconnection for handling iron tailings closes ore-dressing technique |
-
2018
- 2018-03-07 CN CN201810187057.5A patent/CN108480034A/en not_active Withdrawn
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102430468A (en) * | 2011-09-19 | 2012-05-02 | 鞍钢集团矿业公司 | Magnetism-gravity combined separation technology for magnetic hematite mixed type rough concentrate |
| CN102921540A (en) * | 2012-11-16 | 2013-02-13 | 鞍钢集团矿业公司 | Lean hematite processing technology |
| CN104148165A (en) * | 2014-07-28 | 2014-11-19 | 鞍钢集团矿业公司 | Process for separate grinding and centrifugal recycling of hematite tailings |
| CN104888947A (en) * | 2015-06-12 | 2015-09-09 | 鞍钢集团矿业公司 | Magnetic separation-centrifuge separation technology of micro-fine particle dissemination magnet-hematite mixed ore |
| CN104923386A (en) * | 2015-06-12 | 2015-09-23 | 鞍钢集团矿业公司 | Micro-fine disseminated mixed ore coarse size preconcentrating and magnetic-gravitational separating process |
| CN106513163A (en) * | 2016-10-14 | 2017-03-22 | 鞍钢集团矿业有限公司 | High-pressure rolling and magnetic-gravity separation process for lean hematite |
| CN107597430A (en) * | 2017-08-28 | 2018-01-19 | 鞍钢集团矿业有限公司 | A kind of magnetic reconnection for handling iron tailings closes ore-dressing technique |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112844807A (en) * | 2020-12-21 | 2021-05-28 | 鞍钢集团矿业有限公司 | Magnetic-gravity combined recleaning process for micro-fine particle hematite strong magnetic tailings |
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Application publication date: 20180904 |