CN108480035A - A kind of method of pre-selection-roasting-magnetic separation process recycling magnetic tailing - Google Patents
A kind of method of pre-selection-roasting-magnetic separation process recycling magnetic tailing Download PDFInfo
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- CN108480035A CN108480035A CN201810187069.8A CN201810187069A CN108480035A CN 108480035 A CN108480035 A CN 108480035A CN 201810187069 A CN201810187069 A CN 201810187069A CN 108480035 A CN108480035 A CN 108480035A
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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
- B03B9/00—General arrangement of separating plant, e.g. flow sheets
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Abstract
The present invention relates to a kind of methods that pre-selection calcining magnetic separation process recycles magnetic tailing, include the following steps：It is 9 ~ 13% by Iron grade, the magnetic tailing that carbonic acid iron content is 3% or more feeds one section of weak magnetic, and a magnetic tail feeds one section of strong magnetic, and the last one essence feeds the reselection operation of the smart spiral shell of a thick spiral shell one, and smart spiral shell essence and a magnetic essence merge into the pre-selection essence that grade is 37%~42%；Smart spiral shell tail merges into pre-selection tail with thick spiral shell tail and the last one tail；For pre-selection essence through concentrator, filter thickening filtration, filter cake is fired to obtain roasted ore；Roasted ore is through closed circuit grinding, and the overflow products of 0.046mm contents 90%~95% shakes two sections of continuous magnetic separation of ore separators through two sections of weak magnetics and magnetic, and final concentrate grade is 65% or more；Magnetic shake tail and two magnetic tails and preselect tail merge into grade be 7%~10% finality.It is an advantage of the invention that：1. pre-selection is without ore grinding, advance essence yield 8% ~ 10%, cost declining；2. yield improves 50% or more.
Description
Technical field
The invention belongs to technical field of beneficiation, and in particular to the magnetic tailing for being 3% or more to carbonic acid iron content sorts
A kind of pre-selection-roasting-magnetic separation process recycling magnetic tailing method.
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, specifically it is summarized as follows：
Magnetic separation-dusting cover-magnetic separation process：
For Armco magnetic iron mineral disseminated grain size in magnetic tailing more than 30 particles, 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 in 30 particles 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, regrind granularity 90% or more -0.046mm contents particulate magnetic
Iron ore mine, the major defect sorted using single magnetic separation process or magnetic separation-dusting cover-magnetic separation process are：
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）It is meticulous to regrind granularity, mutually in requisition for thinner dusting cover screen size, sieve pore blockade is easily caused in production；Otherwise, it needs
Lower dusting cover feed ore concentration and larger flushing water are wanted, is not easy to realize in production.
The method that the synthesis tailing of the bloodstone to valuable mineral based on weak magnetism mineral is recycled at present, recycling
Higher rate is pre-selection-calcining magnetic separation process, and pre-selection technique generally regrinds-magnetic separation process using magnetic separation-, and specific summary is such as
Under：
The high intensity magnetic mineral that comprehensive tailing obtains after one section of high-intensity magnetic separation feeds grinding classification system, and ore milling product is strong through two sections again
Magnetic separation is other, carries out reduction roasting after the smart concentrated, filtering of the last two, product is sorted through weak magnetic after roasting, and inferior fine magnetite concentrate is again through ore grinding
Afterwards, then using weak magnetic selected, acquisition final concentrate is carried out.
Carbonic acid iron content is higher in the magnetic iron ore of part valuable mineral fine-grained disseminated grain at present, reaches 3% or more.Magneticore-dressing plant adopts
Such magnetic iron ore is handled with the single magnetic separation technological process of production, ferric carbonate substantially enters magnetic tailing.To such magnetic tailing
Recovery process and method, especially to the recovery process of ferric carbonate and method carry out further investigation inquire into have realistic meaning.
The recovery process of the existing above-mentioned magnetic tailing to valuable mineral based on Armco magnetic iron mineral is used, it is not only magnetic
Iron recovery is relatively low, and can not recycle the ferric carbonate being lost in tailing completely；
The recovery process of the synthesis tailing of the existing above-mentioned bloodstone to valuable mineral based on weak magnetism mineral is used,
Pre-selection technique is that-magnetic separation is regrinded in magnetic separation-, recycles the ferric carbonate in magnetic tailing using strong magnetic, regrinds front and back two sections of high intensity magnetic minerals
Grade compared with to mine, a strong concentrate concentrate 15% hereinafter, two strong concentrate concentrates 21% hereinafter, increase rate is minimum, as a result pay no attention to
Think；Then it uses roasting technique reasonable, ferric carbonate can be converted to Armco magnetic iron, but follow-up low intensity magnetic separation operation will obtain grade
65% iron ore concentrate, -500 97% or more mesh will be reached by regrinding granularity, regrind that granularity requirements are too thin, and cost is high, and is difficult to realize
Commercial Application.
Invention content
The object of the present invention is to provide a kind of pre-selection-roastings that the magnetic tailing for being 3% or more to carbonic acid iron content is sorted
The method of burning-magnetic separation process recycling magnetic tailing.
The invention is realized in this way.
A kind of method of pre-selection-roasting of the present invention-magnetic separation process recycling magnetic tailing, includes the following steps：
1）By the magnetic tailing containing carbonic acid iron, one section of weak magnetic is fed, obtains one section of inferior fine magnetite concentrate that grade is 25%~30%
With one section of weakly magnetic tailings；One section of weakly magnetic tailings is fed into one section of strong magnetic, obtain one section of high intensity magnetic mineral that grade is 12%~14% and
The one section strong magnetic tail mine that grade is 5%~7%；
2）One section of high intensity magnetic mineral is fed into roughing spiral chute, thick spiral shell concentrate feeds selected spiral chute, obtains selected spiral and slips
Slot concentrate, selected spiral chute chats and selected spiral chute tailing, the selected selected spiral chute of spiral chute middling recurrence, essence
It selects spiral chute tailing to constitute pre-selection technique tailing with roughing spiral chute tailing and one section strong magnetic tail mine and throws tail, grade 55%
~60% selected spiral chute concentrate and one section of inferior fine magnetite concentrate, which are merged into, preselects technique concentrate, and pre-selection technique concentrate grade 37%~
42%；
3）Pre-selection technique Jing Kuang Give are entered into concentrator concentration, dense machine Di Liu Give enter filter filtering, obtain moisture weight content
For 10% ~ 15% filter cake, then filter cake restores under the conditions of 530 DEG C ~ 570 DEG C of temperature by roasting technique, obtains Armco magnetic iron point
The roasted ore of 85% or more cloth rate；Concentrator overflow and filter filtrate are as recycling water utilization；
4）Roasted ore is fed to the closed circuit grinding system of cyclone and ball mill composition, partition size is -0.046mm contents 90%
~95% closed circuit grinding overflow product feeds two sections of weak magnetics, and two sections of inferior fine magnetite concentrates feed magnetic and shake ore separators, and magnetic shakes ore separators concentrate
For final concentrate；Shake ore separators tailing and two sections of weakly magnetic tailings, pre-selection technique tailing of magnetic merges into true tailings.
Iron grade in the magnetic tailing containing carbonic acid iron is 9 ~ 13%, and carbonic acid iron content is 3% or more.
The final concentrate grade 65% or more, true tailings grade is 7%~10%.
The present invention shakes ore separators instead of traditional weak magnetic machine using magnetic.
It is an advantage of the invention that：
1. not having grinding operation in pre-selection technique, primary grinding cost has been saved, and has fed the advance technique essence of subsequent job
Mineral products rate only has 8% ~ 10%, reduces 50% or more follow-up roasting sorting operation cost；
2. carbonic acid iron content converts ferric carbonate to vignite 3% or more using roasting technique in magnetic tailing handled by
Object realizes that the common recycling of itself and the Armco magnetic iron mineral being lost in tailing, the rate of recovery reach traditional magnetic tailing recovery process
150% or more.
Description of the drawings
Fig. 1 is the method flow diagram that pre-selection-roasting-magnetic separation process 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 1：
A kind of method of pre-selection-roasting of the present invention-magnetic separation process recycling magnetic tailing, includes the following steps：
1）It is 10.46% by Iron grade, the magnetic tailing that carbonic acid iron content is 3.5% feeds one section of weak magnetic, obtains grade and is
27.35% one section of inferior fine magnetite concentrate and one section of weakly magnetic tailings；One section of weakly magnetic tailings is fed into one section of strong magnetic, obtaining grade is
The one section strong magnetic tail mine that 12.65% one section of high intensity magnetic mineral and grade is 5.92%；
2）One section of high intensity magnetic mineral is fed into roughing spiral chute, thick spiral shell concentrate feeds selected spiral chute, obtains selected spiral and slips
Slot concentrate, selected spiral chute chats and selected spiral chute tailing, the selected selected spiral chute of spiral chute middling recurrence, essence
It selects spiral chute tailing to constitute pre-selection technique tailing with roughing spiral chute tailing and one section strong magnetic tail mine and throws tail, grade is
57.12 selected spiral chute concentrate and one section of inferior fine magnetite concentrate merge into pre-selection technique concentrate, preselect technique concentrate grade
38.96%；
3）Pre-selection technique Jing Kuang Give are entered into concentrator concentration, dense machine Di Liu Give enter filter filtering, obtain moisture weight content
For 10% ~ 15% filter cake, then filter cake restores under the conditions of 530 DEG C ~ 570 DEG C of temperature by roasting technique, obtains Armco magnetic iron point
The roasted ore of 85% or more cloth rate；Concentrator overflow and filter filtrate are as recycling water utilization；
4）Roasted ore is fed to the closed circuit grinding system of cyclone and ball mill composition, partition size is -0.046mm contents
90.5% closed circuit grinding overflow product feeds two sections of weak magnetics, and two sections of inferior fine magnetite concentrates feed magnetic and shake ore separators, and magnetic shakes ore separators concentrate
For final concentrate, final concentrate grade is 65.09% or more；Magnetic shakes ore separators tailing and two sections of weakly magnetic tailings, pre-selection technique tailing
True tailings is merged into, true tailings grade is 8.12%.
Embodiment 2：
A kind of method of pre-selection-roasting of the present invention-magnetic separation process recycling magnetic tailing, includes the following steps：
1）It is 12.13% by Iron grade, the magnetic tailing that carbonic acid iron content is 4.23% feeds one section of weak magnetic, obtains grade and is
28.01% one section of inferior fine magnetite concentrate and one section of weakly magnetic tailings；One section of weakly magnetic tailings is fed into one section of strong magnetic, obtaining grade is
The one section strong magnetic tail mine that 13.62% one section of high intensity magnetic mineral and grade is 6.53%；
2）One section of high intensity magnetic mineral is fed into roughing spiral chute, thick spiral shell concentrate feeds selected spiral chute, obtains selected spiral and slips
Slot concentrate, selected spiral chute chats and selected spiral chute tailing, the selected selected spiral chute of spiral chute middling recurrence, essence
It selects spiral chute tailing to constitute pre-selection technique tailing with roughing spiral chute tailing and one section strong magnetic tail mine and throws tail, grade is
57.86 selected spiral chute concentrate and one section of inferior fine magnetite concentrate merge into pre-selection technique concentrate, preselect technique concentrate grade
37.86%；
3）Pre-selection technique Jing Kuang Give are entered into concentrator concentration, dense machine Di Liu Give enter filter filtering, obtain moisture weight content
For 10% ~ 15% filter cake, then filter cake restores under the conditions of 530 DEG C ~ 570 DEG C of temperature by roasting technique, obtains Armco magnetic iron point
The roasted ore of 85% or more cloth rate；Concentrator overflow and filter filtrate are as recycling water utilization；
4）Roasted ore is fed to the closed circuit grinding system of cyclone and ball mill composition, partition size is -0.046mm contents
94.5% closed circuit grinding overflow product feeds two sections of weak magnetics, and two sections of inferior fine magnetite concentrates feed magnetic and shake ore separators, and magnetic shakes ore separators concentrate
For final concentrate, final concentrate grade is 65.39% or more；Magnetic shakes ore separators tailing and two sections of weakly magnetic tailings, pre-selection technique tailing
True tailings is merged into, true tailings grade is 9.22%.
Claims (3)
1. the method for kind of pre-selection-roasting-magnetic separation process recycling magnetic tailing, it is characterised in that include the following steps：
1）By the magnetic tailing containing carbonic acid iron, one section of weak magnetic is fed, obtains one section of inferior fine magnetite concentrate that grade is 25%~30%
With one section of weakly magnetic tailings；One section of weakly magnetic tailings is fed into one section of strong magnetic, obtain one section of high intensity magnetic mineral that grade is 12%~14% and
The one section strong magnetic tail mine that grade is 5%~7%；
2）One section of high intensity magnetic mineral is fed into roughing spiral chute, thick spiral shell concentrate feeds selected spiral chute, obtains selected spiral and slips
Slot concentrate, selected spiral chute chats and selected spiral chute tailing, the selected selected spiral chute of spiral chute middling recurrence, essence
It selects spiral chute tailing to constitute pre-selection technique tailing with roughing spiral chute tailing and one section strong magnetic tail mine and throws tail, grade 55%
~60% selected spiral chute concentrate and one section of inferior fine magnetite concentrate, which are merged into, preselects technique concentrate, and pre-selection technique concentrate grade 37%~
42%；
3）Pre-selection technique Jing Kuang Give are entered into concentrator concentration, dense machine Di Liu Give enter filter filtering, obtain moisture weight content
For 10% ~ 15% filter cake, then filter cake restores under the conditions of 530 DEG C ~ 570 DEG C of temperature by roasting technique, obtains Armco magnetic iron point
The roasted ore of 85% or more cloth rate；Concentrator overflow and filter filtrate are as recycling water utilization；
4）Roasted ore is fed to the closed circuit grinding system of cyclone and ball mill composition, partition size is -0.046mm contents 90%
~95% closed circuit grinding overflow product feeds two sections of weak magnetics, and two sections of inferior fine magnetite concentrates feed magnetic and shake ore separators, and magnetic shakes ore separators concentrate
For final concentrate；Shake ore separators tailing and two sections of weakly magnetic tailings, pre-selection technique tailing of magnetic merges into true tailings.
2. the method for pre-selection-roasting according to claim 1-magnetic heavy industry skill recycling magnetic tailing, it is characterised in that described
The magnetic tailing containing carbonic acid iron in Iron grade be 9 ~ 13%, carbonic acid iron content be 3% or more.
3. the method for pre-selection-roasting according to claim 1-magnetic heavy industry skill recycling magnetic tailing, it is characterised in that described
Final concentrate grade 65% or more, true tailings grade is 7%~10%.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810187069.8A CN108480035A (en) | 2018-03-07 | 2018-03-07 | A kind of method of pre-selection-roasting-magnetic separation process recycling magnetic tailing |
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| CN201810187069.8A CN108480035A (en) | 2018-03-07 | 2018-03-07 | A kind of method of pre-selection-roasting-magnetic separation process recycling magnetic tailing |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101862703A (en) * | 2010-05-17 | 2010-10-20 | 昆明理工大学 | Separation-smelting combined method for producing iron ore concentrate from oolitic lean hematite |
| CN102389859A (en) * | 2011-11-03 | 2012-03-28 | 河北联合大学 | Method for processing and utilizing specularite |
| CN103316761A (en) * | 2013-07-09 | 2013-09-25 | 昆明冶金研究院 | Separation method for ore containing ilmenite and chromite |
| CN104588202A (en) * | 2015-01-29 | 2015-05-06 | 鞍钢集团矿业公司 | Beneficiation method for extremely lean iron ore pre-separation tailings |
| CN105233976A (en) * | 2015-11-05 | 2016-01-13 | 鞍钢集团矿业公司 | Tailing recovery process adopting preconcentration-roasting-regrinding and magnetic separation method |
| CN107088469A (en) * | 2017-06-16 | 2017-08-25 | 鞍钢集团矿业有限公司 | A kind of composite ore point mill, sorting, suspension roasting tower mill weak magnetic separation process |
| CN107088470A (en) * | 2017-06-16 | 2017-08-25 | 鞍钢集团矿业有限公司 | A kind of composite ore point mill, sorting, strong magnetic suspension are calcined weak magnetic separation process |
-
2018
- 2018-03-07 CN CN201810187069.8A patent/CN108480035A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101862703A (en) * | 2010-05-17 | 2010-10-20 | 昆明理工大学 | Separation-smelting combined method for producing iron ore concentrate from oolitic lean hematite |
| CN102389859A (en) * | 2011-11-03 | 2012-03-28 | 河北联合大学 | Method for processing and utilizing specularite |
| CN103316761A (en) * | 2013-07-09 | 2013-09-25 | 昆明冶金研究院 | Separation method for ore containing ilmenite and chromite |
| CN104588202A (en) * | 2015-01-29 | 2015-05-06 | 鞍钢集团矿业公司 | Beneficiation method for extremely lean iron ore pre-separation tailings |
| CN105233976A (en) * | 2015-11-05 | 2016-01-13 | 鞍钢集团矿业公司 | Tailing recovery process adopting preconcentration-roasting-regrinding and magnetic separation method |
| CN107088469A (en) * | 2017-06-16 | 2017-08-25 | 鞍钢集团矿业有限公司 | A kind of composite ore point mill, sorting, suspension roasting tower mill weak magnetic separation process |
| CN107088470A (en) * | 2017-06-16 | 2017-08-25 | 鞍钢集团矿业有限公司 | A kind of composite ore point mill, sorting, strong magnetic suspension are calcined weak magnetic separation process |
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