CN108672082A - Magnetic iron ore high pressure roller mill-wet type pre-selecting-stage grinding-tower grinds magnetic separation process - Google Patents
Magnetic iron ore high pressure roller mill-wet type pre-selecting-stage grinding-tower grinds magnetic separation process Download PDFInfo
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- CN108672082A CN108672082A CN201810729014.5A CN201810729014A CN108672082A CN 108672082 A CN108672082 A CN 108672082A CN 201810729014 A CN201810729014 A CN 201810729014A CN 108672082 A CN108672082 A CN 108672082A
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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
- 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 magnetic iron ore high pressure roller mill wet type pre-selecting stage grinding towers to grind magnetic separation process, including slightly breaks operation and break operation in, it is characterised in that middle crushing operation product sequence is fed following operations：The closed circuit high pressure roller mill screening operation being made of high-pressure roller mill and screening plant, wet type pre-selecting magnetic concentration working, one section of closed circuit grinding operation, swirl flow device is classified the two sections of closed circuit grinding operations constituted with two sections of tower grinding machines and continuous three stages of magnetic separation operation, it is 67% 67.8% to obtain grade, the final concentrate and grade that yield is 38% 41% are 8.5% 9.5%, the synthesis tailing that yield is 62% 59%.It is an advantage of the invention that：It is preselected using high pressure roller mill, reduces mill feed size, improve Beneficiation Feed Grade and mog；Using two sections of closed circuit grinding operations of cyclone and tower grinding machine composition, eliminates spun yarn evenness operation, reduces 5 stages of magnetic separation operations；Change technological process, reduces beneficiation cost.
Description
Technical field
The invention belongs to technical field of beneficiation, and in particular to a kind of magnetic iron ore high pressure roller that technological process greatly simplifies
Mill-wet type pre-selecting-stage grinding-tower grinds magnetic separation process.
Background technology
In mining processing industry, " coarse broken, the broken, thin broken screening, stage grinding-dusting cover are again for processing magnetic iron ore generally use
Mill-single magnetic separation " technological process sorts.Specific technological process is usually：Raw ore（1000-0mm）By slightly breaking, in break, it is thin
After broken screening, crushed product size reaches 12-0 mm, wherein in break, thin broken screening operation accounts for 25% of beneficiation cost or so, at
This is higher, and the crushed product of 12-0 mm is after the closed circuit grinding that primary grinding and scalping form, scalping overflow grain
Degree reaches -200 mesh contents 58 ~ 60%, and scalping overflow feeds a stage magnetic separator and sorts, and a stages of magnetic separation concentrate feeds secondary point
The secondary closed circuit grinding system of grade cyclone and secondary ball milling composition, secondary grading overflow product granularity reach -200 mesh contents
90%, for secondary grading overflow product after one section of dehydration slot, two stage magnetic separators sort, two stages of magnetic separation concentrate feed one section of dusting cover
Operation, after dehydration magnetic separator dehydration, dehydration magnetic separator concentrate feeds three sections of ball mills and regrinds one section of dusting cover oversize, regrinds
Product granularity reaches -200 mesh content 85%-90% afterwards, regrinds rear product and feeds two sections of dehydrations slot, three stage magnetic separators and sorts, three sections
Magnetic separator concentrate feeds two sections of dusting cover operations, and two sections of dusting cover oversizes feed three sections of ball mills after returning to dehydration magnetic separator dehydration
It regrinds.Merge under one section of dusting cover sieve, under two sections of dusting cover sieves and feed three sections of dehydration slots, four stage magnetic separators, four sections of dehydration slots, four sections de-
Sink concentrate is final concentrate, and grade is 67% or more；One stages of magnetic separation tailing, two stages of magnetic separation tailings, takes off one section of dehydration slot tailing
Hydromagnetic selects tail mine, two sections of dehydration slot tailings, three stages of magnetic separation tailings, three sections of dehydration slot tailings, four stages of magnetic separation tailings, four sections of dehydrations
Slot tailing is combined into true tailings, grade 10-11%.Typically broken ore grinding selecting process is shown in Fig. 1.
Magnetic iron ore is selected using " Three stage crushing with single closed circuit stage, the single magnetic separation process of stage grinding-spun yarn evenness-" technological process
Not, there are three sections of broken, one section of screenings in crushing circuit, have three sections of grinding operations, two sections of dusting cover operations, nine sections of magnetic in Beneficiation flowsheet
It is elected to be industry, hence it is evident that there are following problem and shortage：1）Broken hop count is more, sorts that hop count is more, and technological process complexity is tediously long；2）
Production operation control management is inconvenient, and grinding machine is regrinded again for a large amount of returns measured on two sections of dusting cover sieves especially in Beneficiation flowsheet, is easy to make
Unstable at flow, index easily fluctuates, and influences normally to produce；3）The drawbacks such as beneficiation cost is higher.
Invention content
The object of the present invention is to provide a kind of magnetic iron ore that technological process greatly simplifies high pressure roller mill-wet type pre-selecting-stages
Ore grinding-tower grinds magnetic separation process.
The invention is realized in this way：
The present invention a kind of magnetic iron ore high pressure roller mill-wet type pre-selecting-stage grinding-tower grind magnetic separation process, including slightly break operation and
In break operation, it is characterised in that by middle crushing operation product sequence feed following operations：By high-pressure roller mill and screening plant structure
At closed circuit high pressure roller mill-screening operation, by high pressure roller mill-, that screening product feeds wet type is pre-
Magnetic concentration working, pre-selection magnetic separator concentrate is selected to feed one section of closed circuit grinding that a cyclone classification and one section of grinding machine are constituted and make
Industry, scalping overflow feed a stages of magnetic separation operation, and a stages of magnetic separation operation concentrate feeds the classification of swirl flow device and ground with two sections of towers
Mechanism at two sections of closed circuit grinding operations, secondary grading overflow feeds continuous three stages of magnetic separation operation, and selected magnetic concentration working concentrate is
Final concentrate, pre-selection magnetic concentration working tailing, a stages of magnetic separation operation tailing, two stages of magnetic separation operation tailings, three stages of magnetic separation operation tailings
Comprehensive tailing is merged into selected magnetic concentration working tailing.
The advance magnetic concentration working uses CTS600 × 600mm downstream-type magnetic separators, preselects magnet separator magnetic field intensity
240Tm, a stages of magnetic separation operation use magnetic field intensity for a stage magnetic separator of 160Tm, and two stages of magnetic separation operations use magnetic field
Intensity is：Two stage magnetic separators of 140Tm, three stages of magnetic separation operation magnetic field intensities are：Three stage magnetic separators of 120Tm, selected magnetic separation are made
Industry use intensity for：The cleaning magnetic separator of 110Tm.Each section of different work is different using the magnetic field intensity of magnetic separator, effectively in carrying
The concentrate grade of high each section of sorting operation, while using the difference of magnetic field intensity, gangue mineral and poor adhesion that jettisoning is mingled with
Body.
It is 30%~32% that operation product grade is broken in described, granularity is the mm of 25mm~0, high pressure roller mill-screening product
Granularity is -3mm.
Wet type pre-selecting magnetic separator concentrate grade be 34%~37.5%, wet type pre-selecting magnetic separator tailings grade be 7.5%~
8.5%, yield is 17%~20%.
The scalping overflow granularity is -200 mesh content 65%-70%.One stage magnetic separator concentrate grade is 49%-
52%, a stage magnetic separator tailings grade is 6.5%~7.5%.
The secondary grading overflow granularity is -325 mesh 90%~95%.Two stage magnetic separator concentrate grades be 63%~
64.5%, two stage magnetic separator tailings grades are 6.5%~7.5%, three stage magnetic separator concentrate 65%~66%, three stage magnetic separator tailing product
Position is 12.5% ~ 14.5%, and cleaning magnetic separator concentrate grade is 67%-67.8%, yield 38%-41%, and comprehensive tailings grade is
8.5%-9.5%, yield 62%-59%.
The tower grinding machine is 0.05m3Use for laboratory tower grinding machine.
The high-pressure roller mill model GLGY-06025H type roller mills.
The analysis on its rationality of the present invention：
In the Three stage crushing with single closed circuit stage flow of the prior art, after ore need to first pass through coarse broken, the broken, thin broken screening, granularity reaches
Primary grinding operation can be just fed to 92% or more -12mm grain size contents.If replaced using closed circuit high pressure roller mill-screening operation
Break ore discharge in the processing of thin broken-screening operation, product granularity can reach -3mm hereinafter, make the mill feed size of a grinding machine by -
12mm be reduced to -3mm hereinafter, and the product may be used wet type pre-selecting throw remove bulky grain qualified tailings, reduce a ball milling
The treating capacity of machine improves mog, improves the Beneficiation Feed Grade of ore.High pressure roller mill compared with wet self-grinding, high pressure roller mill
Feed preparation unit size 0-25mm, wet type semi-autogenous mill feed preparation unit size 0-300 mm, two kinds of broken grinding modes have application in ore dressing plant.
The high-pressure roller mill that compares is a kind of novel ore dressing crushing plant, and promotion prospect is more extensive, especially in original technology
Increase roller in reforming technology and grind operation, practice more convenient, and wet type is Semi-Autogenous is more suitable in design side of Xin Jianxuan factories
Face design application.The characteristics of the two respectively has itself respectively has respective advantage, sees that handled ore is more economical using that mode
Rationally.
In the Fine screening-regrinding technology of the prior art, one section of dusting cover sieve is upper, two sections of dusting covers sieve and feed open circuit ball mill
It regrinds, is not reached requirement if regrinding granularity, two sections of upper back amount of dusting cover sieve can be caused to increase, vicious circle is formed, influence to give birth to
Production and sorting index；If a stages of magnetic separation concentrate directly used at the closed circuit grinding operation of classifying cyclone and tower grinding machine composition
Reason, makes two sections of cyclone overflow product granularities reach -325 mesh content 90%-95%, two sections of cyclone overflows are using several stages of magnetic separation
Operation sorts, and can get qualification grade concentrate；Spun yarn evenness operation can be not only eliminated in this way, but also can reduce multistage magnetic separation work
Industry, simplification of flowsheet reduce beneficiation cost.
The present invention compared with the prior art the advantages of be：
1）The pre-selection operation of closed circuit high pressure roller mill is introduced flow by the present invention, and instead of thin broken-screening operation, primary ball mill enters mill
Granularity is reduced to -3mm by -12mm, enters to grind grade and improves 4~5 percentage points, and entering mill amount reduces 20% or so, improves one
The processing capacity and mog of secondary ball mill；
2）Two sections of closed circuit grinding operations introducing flow that the present invention forms " classifying cyclone and tower grinding machine ", stage magnetic separator essence
Mine directly feeds secondary closed circuit grinding operation, and two sections of cyclone overflow granularities reach -325 mesh content 90%-95%, using three times
Magnetic concentration working sorts, and obtains qualified grade concentrate, reduces one section of open-circuit grinding operation, 5 stages of magnetic separation operations, and two sections of dusting covers are made
Industry；
3）The present invention enormously simplifies existing technological process, realizes that short route sorts, considerably reduces beneficiation cost, economical
Remarkable benefit.
Description of the drawings
Fig. 1 is existing " Three stage crushing with single closed circuit stage, the single magnetic separation process of stage grinding-spun yarn evenness-" flow chart.
Fig. 2 is " magnetic iron ore high pressure roller mill-wet type pre-selecting-stage grinding-tower grinds magnetic separation process " flow chart of the invention.
Specific implementation mode
The invention will be further described with reference to the accompanying drawings and examples.
As shown in Figure 2：A kind of magnetic iron ore high pressure roller mill-wet type pre-selecting-stage grinding-tower of the present invention grinds magnetic separation work
Skill, including slightly break operation and break operation in, it is characterised in that further include the following steps：
1）It is 30%~32% by grade, granularity feeds for broken operation product in the mm of 25mm~0 and set by high-pressure roller mill and screening
The standby closed circuit high pressure roller mill-screening operation constituted, the high-pressure roller mill are GLGY-06025H type roller mills, obtain granularity
For high pressure roller mill-screening product of -3mm；
2）High pressure roller mill-screening product is fed into wet type pre-selecting magnetic separator, obtains the wet type pre-selecting magnetic that grade is 34%~37.5%
Select the wet type pre-selecting magnetic separator tailing that machine concentrate and grade are 7.5%~8.5%, yield is 17%~20%；
3）Wet type pre-selecting magnetic separator concentrate is fed one section of closed circuit grinding that a cyclone classification and one section of tower grinding machine are constituted to make
Industry obtains the scalping overflow that granularity is -200 mesh content 65%-70%；
4）Scalping overflow is fed into a stage magnetic separator, the stage magnetic separator concentrate and grade that acquisition grade is 49%-52% are
6.5%~7.5% stage magnetic separator tailing；
5）One stage magnetic separator concentrate is fed into two sections of closed circuit grinding operations that the classification of swirl flow device is constituted with two sections of tower grinding machines, institute
The tower grinding machine stated is 0.05m3Use for laboratory tower grinding machine obtains the secondary grading overflow that granularity is -325 mesh 90%~95%；
6）Secondary grading overflow is fed into two stage magnetic separators, obtain two stage magnetic separator concentrate and grade is 6.5%~7.5% two sections
Magnetic separator tailing；Two stage magnetic separator concentrate are fed into three stage magnetic separators, obtain three stage magnetic separator concentrate and grade be 12.5% ~
14.5% three stage magnetic separator tailings；Three stage magnetic separator concentrate are fed into cleaning magnetic separator, acquisition grade is 67%-67.8%, yield
For the cleaning magnetic separator concentrate and cleaning magnetic separator tailing of 38%-41%；Cleaning magnetic separator concentrate is final concentrate product；
7）By wet type pre-selecting magnetic separator tailing, a stage magnetic separator tailing, two stage magnetic separator tailings, three stage magnetic separator tailings and selected
It is 8.5%-9.5% that magnetic separator tailing, which merges into grade, and yield is the synthesis tailing of 62%-59%.
Embodiment 1：
As shown in Figure 2：Magnetic iron ore high pressure roller mill-wet type pre-selecting-stage grinding-tower of the present invention grinds magnetic separation process,
Operation is broken in including slightly breaking operation, it is characterised in that further include the following steps：
1）It is 31.5% by grade, granularity is to break operation product in the mm of 25mm~0 to feed by high-pressure roller mill and screening plant
Constitute closed circuit high pressure roller mill-screening operation, the high-pressure roller mill be GLGY-06025H type roller mills, obtain granularity be-
The high pressure roller mill of 3mm-screening product；
2）High pressure roller mill-screening product is fed into wet type pre-selecting magnetic separator, obtains the wet type pre-selecting magnetic separator essence that grade is 36.5%
The wet type pre-selecting magnetic separator tailing that mine and grade are 7.95%, yield is 17.51%；
3）Magnetic separator concentrate will be preselected and feed one section of closed circuit grinding operation that a cyclone classification and one section of tower grinding machine are constituted, obtained
Obtain the scalping overflow that granularity is -200 mesh contents 65% ~ 70%；
4）Scalping overflow is fed into a stage magnetic separator, the stage magnetic separator concentrate and grade that acquisition grade is 49.5% are
A 7.4% stage magnetic separator tailing；
5）One stage magnetic separator concentrate is fed two sections that the classification of two sections of cyclones and swirl flow device constitutes with two sections of tower grinding machines to close
Road grinding operation, the tower grinding machine are 0.05m3Use for laboratory tower grinding machine obtains secondary point that granularity is -325 mesh 90% ~ 95%
Grade overflow；
6）Secondary grading overflow is fed into two stage magnetic separators, obtains two stage magnetic separator concentrate and grade as 6.45% two stages of magnetic separation
Tail mine；Two stage magnetic separator concentrate are fed into three stage magnetic separators, it is 12.5% ~ 13.85% to obtain three stage magnetic separator concentrate and grade
Three stage magnetic separator tailings；Three stage magnetic separator concentrate are fed into cleaning magnetic separator, it is 67.66% to obtain grade, yield 39.35%
Cleaning magnetic separator concentrate and cleaning magnetic separator tailing；Cleaning magnetic separator concentrate is final concentrate product；
7）By wet type pre-selecting magnetic separator tailing, a stage magnetic separator tailing, two stage magnetic separator tailings, three stage magnetic separator tailings and selected
Magnetic separator tailing merges into the synthesis tailing that grade is 8.04%, yield is 60.65%.
Claims (10)
1. a kind of magnetic iron ore high pressure roller mill-wet type pre-selecting-stage grinding-tower grinds magnetic separation process, including slightly breaks operation and broken in and made
Industry, it is characterised in that middle crushing operation product sequence is fed into following operations：It is closed with what screening plant was constituted by high-pressure roller mill
High pressure roller mill-screening product is fed wet type pre-selecting magnetic concentration working by road high pressure roller mill-screening operation, and pre-selection magnetic separator concentrate is given
Enter one section of closed circuit grinding operation that a cyclone classification and one section of grinding machine are constituted, scalping overflow feeds stages of magnetic separation work
Industry, a stages of magnetic separation operation concentrate feeds two sections of closed circuit grinding operations that the classification of swirl flow device is constituted with two sections of tower grinding machines, secondary
Grading Overflow feeds continuous three stages of magnetic separation operation, and selected magnetic concentration working concentrate is final concentrate, pre-selection magnetic concentration working tailing, one section
Magnetic concentration working tailing, two stages of magnetic separation operation tailings and three stages of magnetic separation operation tailings and selected magnetic concentration working tailing merge into comprehensive tail
Mine.
2. magnetic iron ore high pressure roller mill-wet type pre-selecting-stage grinding-tower according to claim 1 grinds magnetic separation process, feature
It is that the advance magnetic concentration working uses CTS600 × 600mm downstream-type magnetic separators, preselects magnet separator magnetic field intensity 240Tm,
The one stages of magnetic separation operation uses magnetic field intensity for a stage magnetic separator of 160Tm, two stages of magnetic separation operations use magnetic field intensity for：
Two stage magnetic separators of 140Tm, three stages of magnetic separation operation magnetic field intensities are：Three stage magnetic separators of 120Tm, selected magnetic concentration working is using strong
Degree is：The cleaning magnetic separator of 110Tm.
3. magnetic iron ore high pressure roller mill-wet type pre-selecting-stage grinding-tower according to claim 1 grinds magnetic separation process, special
It is 30%~32% that operation product grade is broken in levying described in being, granularity is the mm of 25mm~0,
High pressure roller mill-screening product granularity is -3mm.
4. magnetic iron ore high pressure roller mill-wet type pre-selecting-stage grinding-tower according to claim 2 grinds magnetic separation process, special
Sign be wet type pre-selecting magnetic separator concentrate grade be 34 %~37.5%, wet type pre-selecting magnetic separator tailings grade be 7.5%~8.5%,
Yield is 17%~20%.
5. magnetic iron ore high pressure roller mill-wet type pre-selecting-stage grinding-tower according to claim 1 grinds magnetic separation process, feature
It is that the scalping overflow granularity is -200 mesh content 65%-70%.
6. magnetic iron ore high pressure roller mill-wet type pre-selecting-stage grinding-tower according to claim 2 grinds magnetic separation process, feature
It is that a stage magnetic separator concentrate grade is 49%-52%, a stage magnetic separator tailings grade is 6.5%~7.5%.
7. magnetic iron ore high pressure roller mill-wet type pre-selecting-stage grinding-tower according to claim 1 grinds magnetic separation process, feature
It is that the secondary grading overflow granularity is -325 mesh 90%~95%.
8. magnetic iron ore high pressure roller mill-wet type pre-selecting-stage grinding-tower according to claim 2 grinds magnetic separation process, feature
It is that the two stage magnetic separator concentrate grades are 63%~64.5%, two stage magnetic separator tailings grades are 6.5%~7.5%, three sections
Magnetic separator concentrate 65%~66%, three stage magnetic separator tailings grades are 12.5% ~ 14.5%, and cleaning magnetic separator concentrate grade is 67%-
67.8%, yield 38%-41%, comprehensive tailings grade are 8.5%-9.5%, yield 62%-59%.
9. a kind of magnetic iron ore high pressure roller mill-wet type pre-selecting-stage grinding-tower according to claim 1 grinds magnetic separation process,
It is characterized in that the high-pressure roller mill is GLGY-06025H type roller mills.
10. a kind of magnetic iron ore high pressure roller mill-wet type pre-selecting-stage grinding-tower according to claim 1 grinds magnetic separation process,
It is characterized in that the tower grinding machine is 0.05m3Use for laboratory tower grinding machine.
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| CN109675711A (en) * | 2019-01-08 | 2019-04-26 | 中冶北方（大连）工程技术有限公司 | A kind of magnetite beneficiation process of the processing containing fine gold mineral |
| CN109692753A (en) * | 2019-01-08 | 2019-04-30 | 中冶北方（大连）工程技术有限公司 | A kind of ore-dressing technique handling easy argillization Ultra-low-grade magnetite stone |
| CN109865585A (en) * | 2019-04-18 | 2019-06-11 | 重钢西昌矿业有限公司 | A method of improving extreme poverty mine mineral products amount |
| CN110898957A (en) * | 2019-11-13 | 2020-03-24 | 鞍钢集团矿业有限公司 | Particle size grading pre-selection tailing discarding process for extremely lean hematite |
| CN111068897A (en) * | 2019-12-20 | 2020-04-28 | 辽宁科技学院 | Fine particle magnetite beneficiation process |
| CN112170001A (en) * | 2020-09-18 | 2021-01-05 | 滦平建龙矿业有限公司 | Ultra-lean magnetite high-pressure roller mill-relaxation sieve combined pretreatment system and process |
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| CN113877718A (en) * | 2021-10-14 | 2022-01-04 | 包钢集团矿山研究院（有限责任公司） | Beneficiation method for recovering high-grade iron ore concentrate from iron-containing waste rock of refuse dump |
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| CN109675711A (en) * | 2019-01-08 | 2019-04-26 | 中冶北方（大连）工程技术有限公司 | A kind of magnetite beneficiation process of the processing containing fine gold mineral |
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| CN110898957A (en) * | 2019-11-13 | 2020-03-24 | 鞍钢集团矿业有限公司 | Particle size grading pre-selection tailing discarding process for extremely lean hematite |
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| CN112170001A (en) * | 2020-09-18 | 2021-01-05 | 滦平建龙矿业有限公司 | Ultra-lean magnetite high-pressure roller mill-relaxation sieve combined pretreatment system and process |
| CN112170001B (en) * | 2020-09-18 | 2023-12-19 | 滦平建龙矿业有限公司 | Ultra-lean magnetite high-pressure roller mill-relaxation sieve combined pretreatment system and process |
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| CN113877718A (en) * | 2021-10-14 | 2022-01-04 | 包钢集团矿山研究院（有限责任公司） | Beneficiation method for recovering high-grade iron ore concentrate from iron-containing waste rock of refuse dump |
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