CN108405179A - A kind of method of magnetic separation-roasting-magnetic separation process recycling magnetic tailing - Google Patents
A kind of method of magnetic separation-roasting-magnetic separation process recycling magnetic tailing Download PDFInfo
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- CN108405179A CN108405179A CN201810187066.4A CN201810187066A CN108405179A CN 108405179 A CN108405179 A CN 108405179A CN 201810187066 A CN201810187066 A CN 201810187066A CN 108405179 A CN108405179 A CN 108405179A
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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
- 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
- B03C1/30—Combinations with other devices, not otherwise provided for
Abstract
The present invention relates to a kind of methods that magnetic separation 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, the continuous magnetic concentration working that one section strong magnetic forms, and the last one tailing throws tail, and a weak concentrate and the last one concentrate merge into a mixed concentrate and feed a closed circuit grinding；The continuous magnetic concentration working that primary overflow product feeds two sections of weak magnetics, two sections strong magnetic forms, the last two tailing throw tail, and two weak concentrate and the last two concentrate merge into two mixed concentrate；Two mixed concentrate obtain roasted ore by concentration, filtering, roasting；Roasted ore throws tail through three sections of weak magnetics, and three weak concentrate feed secondary closed circuit grinding, and secondary overflow product feeds follow-up three sections of continuous magnetic concentration workings, obtain the final concentrate that grade is 63% or more, the true tailings that grade is 7%~10%.It is an advantage of the invention that：Iron recovery reaches 200% or more of traditional magnetic tailing recovery process.
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 magnetic separation-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, the rate of recovery compared with
High is pre-selection-calcining magnetic separation process, and pre-selection technique generally regrinds-magnetic separation process using magnetic separation-, is specifically summarized as follows：
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 magnetic separation-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 magnetic separation-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%；It is 14%~16% that one section of inferior fine magnetite concentrate and one section of high intensity magnetic mineral, which merge into grade,
One mixed concentrate；
2）The closed circuit grinding system that one mixed essence is fed to cyclone and ball mill composition, it is -0.038mm to obtain partition size
The primary overflow product of content 85% ~ 90%；Primary overflow product feeds two sections of weak magnetics, and obtain grade as 45%~52% two sections are weak
Magnetic concentrate and two sections of weakly magnetic tailings；Two sections of weakly magnetic tailings are fed into two sections of strong magnetic, obtain two sections of strong magnetic that grade is 18%~21%
The two sections strong magnetic tail mine that concentrate and grade are 6%~8%；It is 23%~28% that two sections strong magnetic essence merges into grade with two sections of inferior fine magnetite concentrates
Two mixed concentrate；
3）Two mixed Jing Kuang Give are entered into concentrator concentration, dense machine Di Liu Give enter filter filtering, and it is 10% to obtain moisture weight content
~ 20% filter cake, then filter cake restored by roasting technique under the conditions of 530 DEG C ~ 570 DEG C of temperature, obtain Armco magnetic iron distributive law
85% or more roasted ore；Concentrator overflow and filter filtrate are as recycling water utilization；
4）Roasted ore is fed to three sections of weak magnetics, the three sections of inferior fine magnetite concentrates and grade that acquisition grade is 30%~35% are 5%~8%
Three sections of weakly magnetic tailings, three sections of inferior fine magnetite concentrates feed the secondary closed circuit grinding system of cyclone and ball mill composition, obtain classification grain
Degree is the secondary overflow product of -0.025mm contents 85%~95%%；Secondary overflow product feeds four sections of weak magnetics, obtains four sections of weak magnetics
Concentrate and four sections of weakly magnetic tailings；Four sections of inferior fine magnetite concentrates feed Magnetic field screening separator, and Magnetic field screening separator undersize returns secondary closed circuit
Grinding system, Magnetic field screening separator oversize feed five sections of weak magnetics, obtain five sections of inferior fine magnetite concentrates and five sections of weakly magnetic tailings, five sections weak
It is final concentrate that magnetic concentrate, which is grade, five sections of weakly magnetic tailings and one section strong magnetic tail mine, two sections strong magnetic tail mine, three sections of weakly magnetic tailings and
Four sections of weakly magnetic tailings merge 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 63% or more, true tailings grade is 7%~8%.
Four sections of weak magnetics form magnetic separation-magnetic riddler's skill with Magnetic field screening separator.
Five sections of weak magnetics are shaken ore separators using magnetic.
It is an advantage of the invention that：
1. 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
200% or more；
2. four sections of weak magnetics realize magnetic separation-Magnetic field screening separator technique with Magnetic field screening separator, compared with using single magnetic separation process, carry
1-3 percentage points of high concentrate grade, grinding particle size can reduce 5-10%, save production cost；
3. five sections of weak magnetics are shaken ore separators using magnetic, compared with traditional weak magnetic machine sorts, 1-2 percentage points of concentrate grade, and tail
Mine grade is 3-5 percentage points low, realizes effective recycling to superfine rank iron mineral.
Description of the drawings
Fig. 1 is the method flow diagram that magnetic separation-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 magnetic separation-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 13.01% one section of high intensity magnetic mineral and grade is 6.29%；One section of inferior fine magnetite concentrate and one section of high intensity magnetic mineral close
And it is the mixed concentrate that grade is 15.80%；
2）The closed circuit grinding system that one mixed essence is fed to cyclone and ball mill composition, it is -0.038mm to obtain partition size
The primary overflow product of content 87.5%；Primary overflow product feeds two sections of weak magnetics, obtains two sections of weak magnetic essences that grade is 48.41%
Mine and two sections of weakly magnetic tailings；Two sections of weakly magnetic tailings are fed into two sections of strong magnetic, obtain two sections of high intensity magnetic minerals that grade is 20.38% and
The two sections strong magnetic tail mine that grade is 7.17%；Two sections strong magnetic essence merges into the two mixed essences that grade is 26.48% with two sections of inferior fine magnetite concentrates
Mine；
3）Two mixed Jing Kuang Give are entered into concentrator concentration, dense machine Di Liu Give enter filter filtering, obtain moisture weight content and are
12.5% filter cake, then filter cake restored by roasting technique under the conditions of 530 DEG C ~ 570 DEG C of temperature, obtain Armco magnetic iron distributive law
85% or more roasted ore；Concentrator overflow and filter filtrate are as recycling water utilization；
4）Roasted ore is fed to three sections of weak magnetics, three sections of inferior fine magnetite concentrates that grade is 33.87% and grade is 7.33% three are obtained
Section weakly magnetic tailings, three sections of inferior fine magnetite concentrates feed the secondary closed circuit grinding system of cyclone and ball mill composition, obtain partition size
For the secondary overflow product of -0.025mm contents 91.47%；Secondary overflow product feeds four sections of weak magnetics, obtains four sections of inferior fine magnetite concentrates
With four sections of weakly magnetic tailings；Four sections of inferior fine magnetite concentrates feed Magnetic field screening separator, and Magnetic field screening separator undersize returns to secondary closed circuit grinding
System, Magnetic field screening separator oversize feed five sections of weak magnetics, obtain five sections of inferior fine magnetite concentrates and five sections of weakly magnetic tailings, five sections of weak magnetic essences
Mine is the final concentrate that grade is 63.57%, five sections of weakly magnetic tailings and one section strong magnetic tail mine, two sections strong magnetic tail mine, three sections of weak magnetic tails
Mine and four sections of weakly magnetic tailings merge into true tailings, and true tailings grade is 7.52%.
Four sections of weak magnetics form magnetic separation-magnetic riddler's skill with Magnetic field screening separator.
Five sections of weak magnetics are shaken ore separators using magnetic.
Embodiment 2：
A kind of method of magnetic separation-roasting of the present invention-magnetic separation process recycling magnetic tailing, includes the following steps：
1）It is 11.37% by Iron grade, the magnetic tailing that carbonic acid iron content is 4.2% feeds one section of weak magnetic, obtains grade and is
26.79% 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 13.69% one section of high intensity magnetic mineral and grade is 5.73%；One section of inferior fine magnetite concentrate and one section of high intensity magnetic mineral close
And it is the mixed concentrate that grade is 15.26%；
2）The closed circuit grinding system that one mixed essence is fed to cyclone and ball mill composition, it is -0.038mm to obtain partition size
The primary overflow product of content 89.5%；Primary overflow product feeds two sections of weak magnetics, obtains two sections of weak magnetic essences that grade is 50.98%
Mine and two sections of weakly magnetic tailings；Two sections of weakly magnetic tailings are fed into two sections of strong magnetic, obtain two sections of high intensity magnetic minerals that grade is 19.92% and
The two sections strong magnetic tail mine that grade is 6.68%；Two sections strong magnetic essence merges into the two mixed essences that grade is 25.02% with two sections of inferior fine magnetite concentrates
Mine；
3）Two mixed Jing Kuang Give are entered into concentrator concentration, dense machine Di Liu Give enter filter filtering, obtain moisture weight content and are
13.5% filter cake, then filter cake restored by roasting technique under the conditions of 530 DEG C ~ 570 DEG C of temperature, obtain Armco magnetic iron distributive law
85% or more roasted ore；Concentrator overflow and filter filtrate are as recycling water utilization；
4）Roasted ore is fed to three sections of weak magnetics, three sections of inferior fine magnetite concentrates that grade is 33.62% and grade is 6.79% three are obtained
Section weakly magnetic tailings, three sections of inferior fine magnetite concentrates feed the secondary closed circuit grinding system of cyclone and ball mill composition, obtain partition size
For the secondary overflow product of -0.025mm contents 94.39%；Secondary overflow product feeds four sections of weak magnetics, obtains four sections of inferior fine magnetite concentrates
With four sections of weakly magnetic tailings；Four sections of inferior fine magnetite concentrates feed Magnetic field screening separator, and Magnetic field screening separator undersize returns to secondary closed circuit grinding
System, Magnetic field screening separator oversize feed five sections of weak magnetics, and described five sections of weak magnetics are shaken ore separators using magnetic, obtain five sections of weak magnetics
Concentrate and five sections of weakly magnetic tailings, five sections of inferior fine magnetite concentrates are the final concentrate that grade is 65.03%, five sections of weakly magnetic tailings and one section strong
Magnetic tail mine, two sections strong magnetic tail mine, three sections of weakly magnetic tailings and four sections of weakly magnetic tailings merge into true tailings, and true tailings grade exists
7.71%。
Four sections of weak magnetics of the present invention form magnetic separation-magnetic riddler's skill with Magnetic field screening separator.
Claims (5)
1. a kind of method of magnetic separation-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%；It is 14%~16% that one section of inferior fine magnetite concentrate and one section of high intensity magnetic mineral, which merge into grade,
One mixed concentrate；
2）The closed circuit grinding system that one mixed essence is fed to cyclone and ball mill composition, it is -0.038mm to obtain partition size
The primary overflow product of content 85% ~ 90%；Primary overflow product feeds two sections of weak magnetics, and obtain grade as 45%~52% two sections are weak
Magnetic concentrate and two sections of weakly magnetic tailings；Two sections of weakly magnetic tailings are fed into two sections of strong magnetic, obtain two sections of strong magnetic that grade is 18%~21%
The two sections strong magnetic tail mine that concentrate and grade are 6%~8%；It is 23%~28% that two sections strong magnetic essence merges into grade with two sections of inferior fine magnetite concentrates
Two mixed concentrate；
3）Two mixed Jing Kuang Give are entered into concentrator concentration, dense machine Di Liu Give enter filter filtering, and it is 10% to obtain moisture weight content
~ 20% filter cake, then filter cake restored by roasting technique under the conditions of 530 DEG C ~ 570 DEG C of temperature, obtain Armco magnetic iron distributive law
85% or more roasted ore；Concentrator overflow and filter filtrate are as recycling water utilization；
4）Roasted ore is fed to three sections of weak magnetics, the three sections of inferior fine magnetite concentrates and grade that acquisition grade is 30%~35% are 5%~8%
Three sections of weakly magnetic tailings, three sections of inferior fine magnetite concentrates feed the secondary closed circuit grinding system of cyclone and ball mill composition, obtain classification grain
Degree is the secondary overflow product of -0.025mm contents 85%~95%%；Secondary overflow product feeds four sections of weak magnetics, obtains four sections of weak magnetics
Concentrate and four sections of weakly magnetic tailings；Four sections of inferior fine magnetite concentrates feed Magnetic field screening separator, and Magnetic field screening separator undersize returns secondary closed circuit
Grinding system, Magnetic field screening separator oversize feed five sections of weak magnetics, obtain five sections of inferior fine magnetite concentrates and five sections of weakly magnetic tailings, five sections weak
It is final concentrate that magnetic concentrate, which is grade, five sections of weakly magnetic tailings and one section strong magnetic tail mine, two sections strong magnetic tail mine, three sections of weakly magnetic tailings and
Four sections of weakly magnetic tailings merge 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 63% or more, true tailings grade is 7%~8%.
4. the method for a kind of magnetic separation-roasting-magnetic separation process recycling magnetic tailing according to claim 1, it is characterised in that institute
The four sections of weak magnetics stated form magnetic separation-magnetic riddler's skill with Magnetic field screening separator.
5. the method for a kind of magnetic separation-roasting-magnetic separation process recycling magnetic tailing according to claim 1, it is characterised in that institute
The five sections of weak magnetics stated are shaken ore separators using magnetic.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810187066.4A CN108405179A (en) | 2018-03-07 | 2018-03-07 | A kind of method of magnetic separation-roasting-magnetic separation process recycling magnetic tailing |
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| CN201810187066.4A CN108405179A (en) | 2018-03-07 | 2018-03-07 | A kind of method of magnetic separation-roasting-magnetic separation process recycling magnetic tailing |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113798054A (en) * | 2021-08-23 | 2021-12-17 | 鞍钢集团矿业有限公司 | Pre-selection-fluidization roasting-grinding magnetic separation process for treating iron tailings |
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Application publication date: 20180817 |