CN106269204B - A kind of energy saving technique of processing extreme poverty bloodstone wet type pre-selecting rough concentrate - Google Patents
A kind of energy saving technique of processing extreme poverty bloodstone wet type pre-selecting rough concentrate Download PDFInfo
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- CN106269204B CN106269204B CN201610676287.9A CN201610676287A CN106269204B CN 106269204 B CN106269204 B CN 106269204B CN 201610676287 A CN201610676287 A CN 201610676287A CN 106269204 B CN106269204 B CN 106269204B
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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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Abstract
The present invention relates to a kind of energy saving techniques of processing extreme poverty bloodstone wet type pre-selecting rough concentrate, it is characterised in that includes the following steps：1）Wet type pre-selecting rough concentrate is fed into high-frequency dewatering screen and carries out Dewatering operation；2）The oversize of high-frequency dewatering screen directly feeds primary ball mill；3）The ore discharge product of primary ball mill feeds one section of permanent magnetism weak magnetic separator and one section strong magnetomechanical and carries out magnetic separation, one section strong magnetic tail throwing tail, and one section of inferior fine magnetite concentrate and one section of high intensity magnetic mineral merge into mixed magnetic concentrate product, and 4）The undersize of high-frequency dewatering screen merges with mixed magnetic essence product to be fed thickener and carries out concentration operation, concentration operation underflow product feeds thickness grading operation again after scalping cyclone feeds scalping cyclone classification to mine pump pond, is sorted respectively to the coarse fraction product that granularity is 200 mesh contents 40% ~ 45% and the fine particle product that granularity is 85% ~ 90% again after thickness grading.Present invention reduces one section of ball mill ore grinding energy consumption, the power source consumption and follow-up ore grinding that also reduce scalping cyclone equipment sort mine amount, to further reduced ore dressing energy consumption, improve beneficiating efficiency.
Description
Technical field
The invention belongs to technical field of beneficiation, more particularly to a kind of to handle the energy saving of extreme poverty bloodstone wet type pre-selecting rough concentrate
Technique.
Background technology:
Currently, ore dressing plant handles extreme poverty bloodstone generally use coarse grain wet type pre-selecting process, which first will be thick
The extreme poverty hematite that grade after broken is 22% or so feeds semi-autogenous mill, and it is 2 mm that semi-autogenous mill ore discharge, which feeds screen size,
Linear vibrating screen screening after, oversize returns to semi-autogenous mill, and the linear vibrating screen undersize of 2~0 mm granularities feeds
Wet type pre-selecting weak magnetic separator obtains the coarse grain inferior fine magnetite concentrate that grade is 44% or so；The pre-selection low intensity magnetic separation tail that grade is 19% or so
Mine feeds wet type pre-selecting intensity magnetic separator, obtains the coarse grain high intensity magnetic mineral that grade is 28% or so, pre-selection intensity magnetic separator tailing is as thick
Grain tailing is dished out；Pre-selection weak magnetic concentrate selection product merges into wet type pre-selecting concentrate with pre-selection high intensity magnetic mineral product, the pre- concentrate selection
Grade is 31% or so, a concentration of 25% or so, selects factory that the pre-selection rough concentrate is fed to " the stage that Anshan type lean hematite ore is managed in original place
Ore grinding, thickness grading, gravity treatment-magnetic separation-reverse flotation " technological process is handled, and detailed process is that the pre- concentrate selection of the coarse grain feeds former work
Scalping cyclone in skill flow pumps pond, is sorted by entering former flow after scalping cyclone classification.（Former technique
Flow is shown in attached drawing 1）.Wet type rough concentrate granularity in former flow is 2~0 mm, is the result table analyzed to its granularmetric composition
Bright, the accumulative yield of 0.5~0 mm grade products reaches 75% ~ 80% in pre- concentrate selection, preselects -0.076mm in coarse-fine mineral products
（That is -200 mesh）Grade yield is 35% or more, which feeds primary grinding graded operation and not only increase a ball milling
The treating capacity of graded operation, and the fine fraction product in the portioned product regrind after to be easy to cause product overground, influence follow-up
The sorting result of sorting operation reduces metal recovery rate；Simultaneously as the pre-selection rough concentrate product design in former flow is relatively low,
Concentration only has 30% or so and concentration values fluctuation is larger, which directly feeds scalping cyclone pump pond,
It causes scalping cyclone equipment to be difficult to stable operation, not only influences grading effect, reduce classification efficiency, and ought once divide
When grade hydrocyclone sand concentration is relatively low, returning it into primary ball mill, to cause an ore milling concentration relatively low, in this way can serious shadow
The grinding efficiency for ringing a grinding machine, to increase ore grinding energy consumption.
Invention content
The object of the present invention is to provide a kind of reduction primary grinding graded operation milling capacities, reduce by one section of ball mill ore grinding
The power source of energy consumption and scalping cyclone equipment consumes, and stablizes one section of ball mill of optimization and classifying cyclone equipment operation
Technical parameter improves the energy saving technique of the processing extreme poverty bloodstone wet type pre-selecting rough concentrate of beneficiating efficiency.
The energy saving technique of a kind of processing extreme poverty bloodstone wet type pre-selecting rough concentrate of the present invention, it is characterised in that including following
Step：
1）By granularity be 2~0 mm, a concentration of 15% ~ 30%, the wet type pre-selecting rough concentrate that grade is 30% ~ 45% feeds high frequency
Dewatering screen carries out Dewatering operation；
2）The oversize that the granularity of high-frequency dewatering screen is 2~0.5 mm, a concentration of 80% or more, yield is 20% ~ 25% is straight
It connects and feeds primary ball mill；
3）The ore discharge product of primary ball mill feeds one section of permanent magnetism weak magnetic separator and carries out low intensity magnetic separation, and one section of weak magnetic tail mine is given
Enter one section of strong magnetomechanical, one section strong magnetic tail mine is dished out as true tailings, and one section of inferior fine magnetite concentrate is merged into mixed with one section of high intensity magnetic mineral
Magnetic concentrate product, which is 20% ~ 30%；
4）Granularity is 0.5 mm or less, a concentration of 17% ~ 23%, the high-frequency dewatering screen that yield is 75% ~ 80% undersize
Merge with the mixed magnetic essence product of third step and feed thickener and carry out concentration operation, concentrates the overflow of operation as ore dressing plant return water
It recycles；A concentration of 55% or more concentration operation underflow product feeds scalping eddy flow as a cyclone to mineral products
Device pumps pond to mine;
5）Scalping cyclone is pumped into a cyclone in pond to mineral products, through feeding scalping to mine pump to mine
Cyclone, after scalping cyclone classification, a concentration of 80% or more, the scalping of -200 mesh content 13% ~ 18% of granularity is heavy
Sand directly returns to primary ball mill, and a concentration of 45% ~ 50%, the cyclone overflow that granularity is -200 mesh contents 55% ~ 60% gives
Enter thickness grading operation, after thickness grading again to coarse fraction product and granularity that granularity is -200 mesh contents 40% ~ 45% be 85% ~
90% fine particle product is sorted respectively.
Further, the screen size of the high-frequency dewatering screen is 0.5mm.
Compared with prior art, the beneficial effects of the invention are as follows：
1）, reach the pre- concentrate selection product of 80% or more coarse grain using the concentration that high-frequency dewatering screen screens out, feed a ball milling
Machine can more effectively control an ore milling concentration, improve the equipment and technology operating parameter of an ore mill, improve grinding efficiency,
Ore grinding energy consumption is comparatively also reduced in this way.
2）, by a concentration of 18% ~ 20% high-frequency dewatering screen undersize with and 20% ~ 30% mixed magnetic concentrate product of concentration merge
Concentration basin concentration is fed, for 55% or more concentration basin underflow of concentration as scalping cyclone to mine, stabilization optimizes an eddy flow
Device and primary ball mill equipment give mine condition and operating technology parameter, improve ore grinding and classification efficiency.
3）, will pre-selection rough concentrate after high-frequency dewatering screen screening and dewatering, the fine particle product of yield 75% ~ 80% is separated
One section of classifying cyclone directly is fed, overflows through a rotation and feeds thickness grading operation classification, this part fine particle product can after classification
Directly to be sorted, which reduces the ore grinding treating capacities of one section of ball mill, reduce a ball milling ore grinding energy consumption, reduce
Ore grinding cost.
Description of the drawings
Fig. 1 is the former process flow chart that extreme poverty hematite separation factory uses coarse grain wet type pre-selecting process.
Fig. 2 is a kind of energy saving technique flow chart of processing extreme poverty bloodstone wet type pre-selecting rough concentrate of the present invention.
Specific implementation mode
As shown in Figure 2.
The energy saving technique of a kind of processing extreme poverty bloodstone wet type pre-selecting rough concentrate of the present invention, it is characterised in that including following
Step：
1）By granularity be 2~0 mm, a concentration of 15% ~ 30%, grade is 30% ~ 45%
Wet type pre-selecting rough concentrate feed high-frequency dewatering screen carry out Dewatering operation, the sieve pore of the high-frequency dewatering screen
Size is 0.5mm；
2）The oversize that the granularity of high-frequency dewatering screen is 2~0.5 mm, a concentration of 80% or more, yield is 20% ~ 25% is straight
It connects and feeds primary ball mill；
The pre- concentrate selection product of 80% or more coarse grain is reached using the concentration that high-frequency dewatering screen screens out, feeds primary ball mill,
An ore milling concentration can be more effectively controlled, the equipment and technology operating parameter of an ore mill is improved, improves grinding efficiency, in this way
Comparatively ore grinding energy consumption is also reduced.
3）The ore discharge product of primary ball mill feeds one section of permanent magnetism weak magnetic separator and carries out low intensity magnetic separation, and one section of weak magnetic tail mine is given
Enter one section of strong magnetomechanical, one section strong magnetic tail mine is dished out as true tailings, and one section of inferior fine magnetite concentrate is merged into mixed with one section of high intensity magnetic mineral
Magnetic concentrate product, which is 20% ~ 30%；
Coarse grain dewatering screen oversize after high-frequency dewatering screen screening, after one section of ball mill ore grinding, one section of ball milling ore discharge
Part gangue mineral has reached monomer dissociation in product, and one section of ball milling ore discharge product is fed one section of weak magnetic separator, one section of strong magnetic
Machine is sorted, and one section strong magnetomechanical is dished out a part of qualified strong magnetic tail mine under the conditions of corase grinding, is reduced flow in this way and is subsequently ground
Mine sorts mine amount；
4）Granularity is 0.5 mm or less, a concentration of 17% ~ 23%, the high-frequency dewatering screen that yield is 75% ~ 80% undersize
Merge with the mixed magnetic essence product of third step and feed thickener and carry out concentration operation, concentrates the overflow of operation as ore dressing plant return water
It recycles；A concentration of 55% or more concentration operation underflow product feeds scalping eddy flow as a cyclone to mineral products
Device pumps pond to mine;
By a concentration of 17% ~ 23% high-frequency dewatering screen undersize with and 20% ~ 30% mixed magnetic concentrate product of concentration merge to
Enter concentration basin concentration, concentration basin underflow density can reach 55% or more, the underflow as scalping cyclone to mine, not only
Stablize optimize cyclone to mine condition and operating parameter, it is ensured that a cyclone for returning to primary ball mill is heavy
Sand concentration can reach 75% or more, and optimization stabilizes primary ball mill equipment operation technical parameter, improves grinding efficiency, phase
Namely reduce primary ball mill ore grinding energy consumption for, reduce ore grinding cost, at the same also advantageous effect while stablize
Handle the operating of the technological process of the wet type pre-selecting concentrate；
5）Scalping cyclone is pumped into a cyclone in pond to mineral products, through feeding scalping to mine pump to mine
Cyclone, after scalping cyclone classification, a concentration of 80% or more, the scalping of -200 mesh content 13% ~ 18% of granularity is heavy
Sand directly returns to primary ball mill, and a concentration of 45% ~ 50%, the cyclone overflow that granularity is -200 mesh contents 55% ~ 60% gives
Enter thickness grading operation, after thickness grading again to coarse fraction product and granularity that granularity is -200 mesh contents 40% ~ 45% be 85% ~
90% fine particle product is sorted respectively.
Above-mentioned classification, the optimum organization configuration of ore grinding, sorting equipment, have reached the best effective that classification branched ore milling sorts
Fruit reduces one section of ball mill ore grinding energy consumption, also reduce the power source consumption of scalping cyclone equipment and follow-up
Ore grinding sorts mine amount, to further reduced ore dressing energy consumption, improves beneficiating efficiency.
Claims (1)
1. a kind of energy saving technique of processing extreme poverty bloodstone wet type pre-selecting rough concentrate, it is characterised in that include the following steps：
1）By granularity be 2~0 mm, a concentration of 15% ~ 30%, the wet type pre-selecting rough concentrate that grade is 30% ~ 45% feeds high frequency dehydration
Sieve carries out Dewatering operation；
2）The oversize that the granularity of high-frequency dewatering screen is 2~0.5 mm, a concentration of 80% or more, yield is 20% ~ 25% directly to
Enter primary ball mill；
3）The ore discharge product of primary ball mill feeds one section of permanent magnetism weak magnetic separator and carries out low intensity magnetic separation, and one section of weak magnetic tail mine feeds one
The strong magnetomechanical of section, one section strong magnetic tail mine are dished out as true tailings, and one section of inferior fine magnetite concentrate and one section of high intensity magnetic mineral merge into mixed magnetic essence
Mineral products, which is 20% ~ 30%；
4）Granularity is 0.5 mm or less, a concentration of 17% ~ 23%, undersize for the high-frequency dewatering screen that yield is 75% ~ 80% and
The mixed magnetic essence product merging of 3 steps feeds thickener and carries out concentration operation, and the overflow for concentrating operation is sharp again as ore dressing plant return water
With；A concentration of 55% or more concentration operation underflow product as a cyclone to mineral products feed scalping cyclone to
Mine pumps pond;
5）Scalping cyclone is pumped into a cyclone in pond to mineral products, through feeding scalping eddy flow to mine pump to mine
Device, after scalping cyclone classification, a concentration of 80% or more, the scalping sand setting of -200 mesh content 13% ~ 18% of granularity is straight
Connect return primary ball mill, a concentration of 45% ~ 50%, the cyclone overflow that granularity is -200 mesh contents 55% ~ 60% feeds slightly
Subfractionation operation is again that -200 mesh contain to coarse fraction product and granularity that granularity is -200 mesh contents 40% ~ 45% after thickness grading
The fine particle product of amount 85% ~ 90% is sorted respectively.
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| CN107552220B (en) * | 2017-08-30 | 2020-04-10 | 玉溪大红山矿业有限公司 | Safe ore screening optimization process capable of effectively improving yield of concentrate |
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