CN109865588A - A kind of transition zone mixing iron ore beneficiation technique - Google Patents
A kind of transition zone mixing iron ore beneficiation technique Download PDFInfo
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- CN109865588A CN109865588A CN201910291471.5A CN201910291471A CN109865588A CN 109865588 A CN109865588 A CN 109865588A CN 201910291471 A CN201910291471 A CN 201910291471A CN 109865588 A CN109865588 A CN 109865588A
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 158
- 238000000034 method Methods 0.000 title claims abstract description 88
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 79
- 230000007704 transition Effects 0.000 title claims abstract description 23
- 238000005456 ore beneficiation Methods 0.000 title claims abstract description 21
- 239000012141 concentrate Substances 0.000 claims abstract description 115
- 238000007885 magnetic separation Methods 0.000 claims abstract description 99
- 238000005188 flotation Methods 0.000 claims abstract description 54
- 238000011084 recovery Methods 0.000 claims abstract description 51
- 230000005484 gravity Effects 0.000 claims abstract description 47
- 238000000227 grinding Methods 0.000 claims abstract description 33
- 238000011282 treatment Methods 0.000 claims abstract description 33
- 239000004568 cement Substances 0.000 claims abstract description 4
- 238000003860 storage Methods 0.000 claims description 22
- 239000004576 sand Substances 0.000 claims description 16
- 238000010410 dusting Methods 0.000 claims description 14
- 238000012216 screening Methods 0.000 claims description 14
- 238000007873 sieving Methods 0.000 claims description 14
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 9
- 238000004064 recycling Methods 0.000 claims description 9
- 208000005156 Dehydration Diseases 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 6
- 230000018044 dehydration Effects 0.000 claims description 6
- 238000006297 dehydration reaction Methods 0.000 claims description 6
- 239000006148 magnetic separator Substances 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- 239000002356 single layer Substances 0.000 claims description 6
- 239000002002 slurry Substances 0.000 claims description 6
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 3
- 239000002270 dispersing agent Substances 0.000 claims description 3
- 239000006260 foam Substances 0.000 claims description 3
- 239000002516 radical scavenger Substances 0.000 claims description 3
- GCLGEJMYGQKIIW-UHFFFAOYSA-H sodium hexametaphosphate Chemical compound [Na]OP1(=O)OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])O1 GCLGEJMYGQKIIW-UHFFFAOYSA-H 0.000 claims description 3
- 235000019982 sodium hexametaphosphate Nutrition 0.000 claims description 3
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 claims description 3
- -1 that is Substances 0.000 claims description 3
- 238000000605 extraction Methods 0.000 claims 1
- 238000005265 energy consumption Methods 0.000 abstract description 11
- 239000010802 sludge Substances 0.000 description 17
- 229910052500 inorganic mineral Inorganic materials 0.000 description 15
- 239000011707 mineral Substances 0.000 description 15
- LIKBJVNGSGBSGK-UHFFFAOYSA-N iron(3+);oxygen(2-) Chemical class [O-2].[O-2].[O-2].[Fe+3].[Fe+3] LIKBJVNGSGBSGK-UHFFFAOYSA-N 0.000 description 7
- 230000000903 blocking effect Effects 0.000 description 6
- 230000003647 oxidation Effects 0.000 description 5
- 238000007254 oxidation reaction Methods 0.000 description 5
- 239000004927 clay Substances 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 238000003801 milling Methods 0.000 description 3
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 2
- 238000000498 ball milling Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 229910052598 goethite Inorganic materials 0.000 description 2
- AEIXRCIKZIZYPM-UHFFFAOYSA-M hydroxy(oxo)iron Chemical compound [O][Fe]O AEIXRCIKZIZYPM-UHFFFAOYSA-M 0.000 description 2
- 229910001608 iron mineral Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000008188 pellet Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 210000001367 artery Anatomy 0.000 description 1
- 239000002734 clay mineral Substances 0.000 description 1
- 239000011362 coarse particle Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000010187 selection method Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 210000003462 vein Anatomy 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/52—Mechanical processing of waste for the recovery of materials, e.g. crushing, shredding, separation or disassembly
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- Manufacture And Refinement Of Metals (AREA)
Abstract
The present invention relates to a kind of transition zone mixing iron ore beneficiation techniques, including the mixing iron ore of grade 41.8%, raw ore chats cement content 30% is carried out closed circuit three sections of crushing operation+high pressure roller mills, a magnetic concentration working, a thickness grading cyclone operation, a reselection operation, two sections of closed circuit grinding operations, secondary thickness grading cyclone operation, secondary reselection operation, secondary magnetic concentration working and reverse flotation work.Broken operation number of segment is increased by the ultrafine grinding operation of high pressure roller mill, meets the energy saving principle of much broken and lessmill, reduces energy consumption, creates advantage for subsequent sort.Obtained using stages of magnetic separation at the beginning of technique it is smart, middle section gravity treatment obtain it is smart, end flotation obtain it is smart be classified to obtain Seiko skill, obtaining grade is 62%, and the rate of recovery is 52.5% iron ore concentrate I；Grade is 60%, the iron ore concentrate II that the rate of recovery is 12.5%；Comprehensive recovery is up to 65%, and sorting index is much better than stage grinding stage whipping, and process end obtains smart process.
Description
Technical field
The invention belongs to iron ore beneficiation technical field, especially a kind of transition zone mixing iron ore beneficiation technique.
Background technique
Currently, most of ores can be divided into earth's surface mine, transition zone mine and sub-terrain mines according to the difference of buried depth.Generally
Earth's surface mine degree of oxidation is higher, based on bloodstone class ore；Sub-terrain mines degree of oxidation is shallow, generally magnetic iron ore.And excessive mine
Between earth's surface and sub-terrain mines, degree of oxidation also therebetween, normally behaves as mixed ore, i.e., with bloodstone
Class ore and magnetic iron ore collectively form.Bloodstone class ore therein is according to the unusual with bloodstone, illusion of degree of oxidation
Magnetic iron ore and ferruginous clay based on bloodstone, and containing part；According to the difference of degree of hydration and crystal structure, and can be divided into
Bloodstone, limonite and goethite.Transition zone ore is presented due to long-term oxidation, etch, aquation and weathering, general earth's surface mine
Argillization is serious, and sludge content is more, the tacky characteristic of ore.This kind of ore is easily set using traditional broken+sieving circuit
The case where standby and discharge gate blocking, reduce the processing capacity of equipment and the operating rate of whole system.Current most of mines
The grade of transition zone iron ore is 40% or so, to need to grind the ore for selecting upgrading.The characteristics of transition zone mineral are generally presented are as follows: mine
Species are more, and aqueous in the ore molecular structure of part, and particulate fine ore is more in raw ore, the gangue mineral and iron-bearing mineral of particulate
Intergrowth is more, the grade of grade of particulate fine ore and coarse granule and bulky grain ore is not much different；The content of ferruginous clay
Greatly.The characteristics of presenting in ore dressing is exactly the interior water that can not deviate from molecule, and concentrate grade is not high；Each grain in ore and sludge
Grade iron mineral content is more average, it is difficult to carry out whipping by classification；Ferruginous clay easily impacts concentrate quality；Particulate connects
It is more to win body, the more difficult raising of the grade of particulate sludge.General composite ore beneficiation flowsheet is Staged grinding and staged separation, and every section sorts
It is whipping operation, gained concentrate regrinding selects again, obtains final iron ore concentrate in the least significant end of Beneficiation flowsheet；And it is serious for argillization
Ore, in this way, since each grade iron mineral content of sludge is more average, when process leading portion sorts whipping
Hou Douhui loses the higher rate of recovery, causes the rate of recovery of final iron ore concentrate too low；And due to the gangue mineral and iron content of particulate
The intergrowth of mineral is more, it is difficult to dissociate, particulate of the particulate ferruginous clay in this part intergrowth and mineral in process end
Being easy to be mixed into final concentrate when whipping causes final concentrate grade lower.Using traditional stage grinding, stage grading whipping, end
The beneficiation flowsheet for holding smart, the grade of final iron ore concentrate are extremely difficult to 60%, and the rate of recovery is also generally below 60%.And use this side
All ores of method all need first to grind to select again, and ore grinding power consumption is big, increase energy consumption and old of operation.The object of the invention is to research and develop one
Kind can effectively solve the blockage problem of crushing operation, and reducing ore grinding energy consumption simultaneously can improve sorting operation iron concentrate grade and recycling
The transition zone mixing iron ore beneficiation technique of rate.
Summary of the invention
The object of the present invention is to provide a kind of blockage problems that can effectively solve crushing operation, reduce ore grinding energy consumption and energy
Improve the transition zone mixing iron ore beneficiation technique of sorting operation iron concentrate grade and the rate of recovery.
The purpose of the present invention is what is realized by following technical proposals:
A kind of transition zone mixing iron ore beneficiation technique of the invention, it is characterised in that: a kind of transition zone mixing iron ore beneficiation technique,
It is characterized by comprising the mixing iron ore of grade 41.8%, raw ore chats cement content 30% is carried out three sections of crushing operations, a magnetic
It is elected to be industry, a thickness grading cyclone operation, a reselection operation, two sections of closed circuit grinding operations, secondary thickness grading eddy flow
Device operation, secondary reselection operation, secondary magnetic concentration working and reverse flotation work；The granularity is that the raw ore of 1200mm-0mm is given
Enter by coarse crushing, in broken and fine crushing three formed section are broken, pre-selection roller type sifting operation, a magnetic concentration working handles granularity
Enter to grind raw ore for 1 mm -0 mm, a thickness grading operation handles the mixing magnetic middling ore of a magnetic separation, described
A reselection operation handle a thickness grading cyclone operation sand setting product, two sections of closed circuit grinding operations and two
Secondary thickness grading cyclone operation handles the tailing of a gravity treatment, and secondary reselection operation handles secondary thickness grading cyclone operation
Sand setting product, the secondary magnetic concentration working handles the overflow product and secondary thickness grading eddy flow of a thickness grading operation
The overflow product of device operation, the secondary magnetic separation bulk concentrate of reverse flotation work processing.
As advanced optimizing for above scheme, it is that will produce the mixing that granularity is 1200mm-0mm that described three sections broken
Former iron ore feeds roller type sieving machine prescreening desliming, and the roller spacing of roller type sieving machine is 150mm；The sieve of+150mm after desliming
Upper product feed coarse crushing operation to rod-toothed crusher, product and roller type sieving machine to the 150mm-0 of rod-toothed crusher
Contain the merging of mud product under the sieve of 150mm-0 and feeds rotating cylinder log washer and drum sieve progress washup desliming and separating dry space from moist space；
The dry type on-the-sieve material of 150mm~36mm of the discharge drum sieve of rotating cylinder log washer feed in broken operation cone crusher
Machine；Gyratory crusher product feeds dry type double-deck screen shale shaker, broken formation closed circuit crushing in the oversize return of+36mm；Rotation
The wet type undersize material of 36mm~0mm of the discharge drum sieve of formula drum washer feeds wet type coarse grain single-deck vibrating screen and wet type
Particulate single-deck vibrating screen enter continuous two sections of wet screening operations, wet type coarse grain single-deck vibrating screen the undersize of 8mm~0 give
Enter the particulate single-deck vibrating screen of wet type；
The undersize of 2mm~0 of wet type particulate single-deck vibrating screen feeds cyclone group and dewatering screen enters continuous two-stage dewatering
And graded operation, the coarse grain sand setting of the cyclone of primary dewatering and graded operation feed that dewatering screen carries out secondary dehydration and classification is made
Industry, the dewatering screen undersize return cyclone group of 0.5mm~0 form closed circuit；
In the dry type oversize of 36mm~8mm of wet type coarse grain single-deck vibrating screen, 36mm~8mm of dry type double-deck screen shale shaker
Between product merge feed operation fine crushing gyratory crusher enter it is fine crushing-screening closed-circuit operation；Fine crushing-closed circuit 12mm of screening~
0 product, the undersize of 8mm~0mm of dry type double-deck screen shale shaker, wet type particulate single-deck vibrating screen 8mm~2mm dry screen
Upper product, dewatering screen 2mm~0.5mm dehydration after oversize together constitute the product of 12mm~0 that yield is 70% and feed
High pressure roller mill-wet type single layer screening is closed circuit, and+1mm the product on wet type single-deck screen sub-sieve returns to high pressure roller mill；The granularity of cyclone
For -200 mesh 50%~60%, the fine fraction overflow slime product that yield is 30% feeds slurry concentrating pond, the underflow in slurry concentrating pond
The product of 1mm~0 under closed circuit sieve is sieved with high pressure roller mill-wet type single layer feed a weak magnetic operation together enter beneficiation flowsheet.
As advanced optimizing for above scheme, a magnetic concentration working is primary using the primary middle magnetic separation-of low intensity magnetic separation-
Magnetic separation-dusting cover-elutriation magnetic dressing process is once swept in strong magnetic roughing-；
The tailing of low intensity magnetic separation feeds magnetic separation in primary, it is primary in the tailing of magnetic separation feed primary strong magnetic roughing, high intensity magnetic separation
Tailing feeds primary strong magnetic and scans；Grade is 57.71%, and the weak magnetic concentrate selection and primary middle magnetic concentrate that the rate of recovery is 38.7% close
And dusting cover is fed for comprehensive concentrate, it is 62.97% that the undersize of 0.15mm~0 of dusting cover, which feeds and eluriates magnetic separation to obtain grade, recycling
The magnetic separation of iron ore concentrate that rate is 28.35%；Tailing, primary strong magnetic roughing and the concentrate that magnetic is scanned primary by force for eluriating magnetic separation are merged into
Grade is 42.55%, and the magnetic middling ore that the rate of recovery is 45.54% is concentrated to feed a thickness grading cyclone；Dusting cover+
The coarse grain sand setting of 0.15mm, grade 42.5%, oversize and a thickness grading cyclone that the rate of recovery is 15.0% are fed
Reselection operation, primary strong magnetic scan tailing and throw tail.
As advanced optimizing for above scheme, a reselection operation uses spiral chute roughing+spiral chute
The process that selected+spiral chute is scanned, it is selected that the concentrate of a spiral chute roughing feeds a spiral chute, obtains a spiral shell
The selected concentrate of chute, the selected chats of a spiral chute and a spiral chute cleaner tailings are revolved, No. one time spiral chute is selected
Spiral chute of middling recurrence is selected to give mine, and the tailing of a spiral chute roughing feeds a spiral chute and scans, once
Spiral chute cleaner tailings and a spiral chute scavenger concentrate return to a spiral chute roughing；No. one time spiral chute is selected
Grade is 60.97%, and the concentrate that the rate of recovery is 21.56% constitutes a gravity treatment iron ore concentrate, and the grade that a spiral chute is scanned is
34.55%, the tailing that the rate of recovery is 27.82% feeds chats concentration basin, and the underflow of chats concentration basin feeds ore pulp storage tank, ore pulp storage
The storage time of tank is 6 hours, and ore pulp is fed that two sections of ball milling-cyclones are closed circuit, and two sections of ball milling-cyclones are closed by ore pulp tank pump
The overflow product that -0.076mm on road accounts for 90% feeds secondary thickness grading cyclone group；Secondary thickness grading cyclone group it is thick
Grain sand setting feeds secondary gravity treatment.
As advanced optimizing for above scheme, the secondary gravity treatment uses secondary spiral chute roughing+secondary spiral
Chute is selected+process scanned of secondary spiral chute, it is selected that the concentrate of secondary spiral chute roughing feeds secondary spiral chute, obtains
The selected concentrate of secondary spiral chute, the selected chats of secondary spiral chute and secondary spiral chute cleaner tailings, secondary spiral is obtained to slip
The tailing of slot roughing feeds secondary spiral chute and scans, and the selected middling recurrence secondary spiral chute of secondary spiral chute is selected,
The concentrate that the selected tailing of secondary spiral chute and secondary spiral chute are scanned returns to the roughing of secondary spiral chute；Secondary spiral slips
The selected grade of slot is 60.15%, and the concentrate that the rate of recovery is 2.59% constitutes secondary gravity treatment iron ore concentrate, secondary gravity concentrate, primary
It is 62% that the concentrate and a gravity concentrate of the elutriation magnetic separation of magnetic concentration working, which collectively form grade, and the rate of recovery is 52.5% iron ore concentrate I；
Secondary spiral chute gravity tailings throws tail；
As advanced optimizing for above scheme, a thickness grading cyclone and secondary thickness grading cyclone-
0.043mm accounts for 90%, and grade 38.64%, the rate of recovery is that 27.37% overflow product feeds secondary magnetic concentration working, secondary magnetic concentration working
It is made of secondary middle magnetic separation and secondary high intensity magnetic separation, the tailing of secondary middle magnetic separation feeds secondary high intensity magnetic separation, secondary middle magnetic separation and secondary
The grade of high intensity magnetic separation is 44.65%, and the magnetic concentrate that the rate of recovery is 19.59% feeds flotation operation, and secondary strong magnetic scans tailing throwing
Tail.
As advanced optimizing for above scheme, the flotation operation is reverse flotation, and foam is tailing, and underflow is essence
Mine, using the process of a rough floatation, cleaner flotation twice, one selects the underflow of rough floatation to flow automatically to primary cleaning, a cleaner flotation
Underflow flow automatically to secondary cleaner flotation；The grade of secondary cleaner flotation is 60.0%, and the iron ore concentrate that the rate of recovery is 12.5% constitutes flotation
Iron ore concentrate, that is, iron ore concentrate II.
As advanced optimizing for above scheme, three sections of process before ore pulp storage tank are crushed-screening-washup-high pressure roller mills-
The operation system of-gravity treatment of magnetic separation is consistent, works 16 hours for day;Process secondary grinding-after ore pulp storage tank is secondary
The operation system of the secondary magnetic separation-reverse flotation of gravity treatment-is consistent, works 24 hours for day.
As advanced optimizing for above scheme, the low intensity magnetic separation and primary middle magnetic separation use drum magnetic separator, weak magnetic
The magnetic field strength of choosing is 2000GS, and the magnetic field strength of primary middle magnetic separation is 3500GS, and a high intensity magnetic separation is strong using vertical ring pulsating
Magnetomechanical；High intensity magnetic separation is using the vertical strong magnetomechanical of ring pulsating, and the magnetic field strength of primary strong magnetic roughing is 8000 GS, primary strong magnetic
The magnetic field strength scanned is 10000 GS.
As advanced optimizing for above scheme, the secondary middle magnetic separation uses drum magnetic separator, secondary middle magnetic separation
Magnetic field strength is 3500GS, and for secondary high intensity magnetic separation using the vertical strong magnetomechanical of ring pulsating, the magnetic field strength that secondary strong magnetic is scanned is 4000
GS, high intensity magnetic separation is using the vertical strong magnetomechanical of ring pulsating.
As advanced optimizing for above scheme, the regime of agent of the flotation is that 1500g/t is added to mine in rough floatation
Sodium hexametaphosphate dispersant to mine of PH regulator NaOH, 50g/t, blistering and collecting agent MS-2715 of the 500g/t to mine.
The invention has the advantages that
1) technique crushing operation of the invention use coarse crushing+in broken+fine crushing+high pressure roller mill technique, relative to traditional thick
Broken+Semi-autogenous Grinding Technology increases broken operation number of segment, meets the energy saving principle of much broken and lessmill, reduces energy consumption.Eliminate half
Autogenous grinding operation has subtracted Semi-Autogenous ball consumption, has reduced the consumption of milling medium.
2) technique of the invention it is broken using coarse crushing+in broken+fine crushing+high pressure roller mill technique, pass through and increase high pressure roller
Mill feeds magnetic concentration working after mixing the ore pulp that the granularity of ore is reduced to the 0-1mm and resulting 0-1mm of washup and sorts.This side
Method, in the method for ore dressing, eliminates primary grinding relative to traditional first ball milling, and the energy consumption of ore grinding greatly reduces, reduces
Milling medium consumption, reduces investment and operation cost.
3) technique of the invention carries out ultrafine grinding using high pressure roller mill, by the granularity of the final closed circuit product of high pressure roller mill
Control is 0-1mm, the high feature of high pressure roller mill attrition crushing fine fraction product content is taken full advantage of, while reducing energy consumption
Fine-graded content is increased, creates advantage for subsequent sort.
4) technique of the invention, from coarse crushing to a magnetic separation using identical working system, i.e., the daily working time is
It is 16 hours, creative that gravity treatment of a magnetic separation is consistent with broken-washup-screening-high pressure roller mill operation system, it avoids
Traditional process, crushing operation time are less than the sorting operation time, when to ensure that operating rate need to be arranged bulk storage facility, 0-
Insurmountable settlement issues when 1mm ore pulp, have ensured going on smoothly for entire production.
5) technique of the invention, coarse crushing is using roller type sieving machine+to rod-toothed crusher operation, and sludge is from roller type sieving machine
It is dropped between big spacing roll gap, avoids viscous blocking of the sludge to subsequent coarse crushing operation, and between the big roller of roller spacing roller type sifting
Big space width away from and to rod-toothed crusher can also eliminate most of height and glue blocking of the aqueous sludge to equipment；Effective solution
The blockage problem of coarse crushing operation.
6) process flow of the invention, coarse crushing product directly feed washup operation, and the undersize of washup directly feeds two
Sludge is adequately washed into ore pulp by washup, the desliming of wet screening by section wet screening, and the desliming for realizing mineral, which is cleaned, to be made
Industry, sludge do not enter into it is fine crushing and its to ore discharge operation, it is effective to avoid blocking of the sludge to equipment and charging and discharging equipment,
It ensure that the operating rate of whole system.
7) process flow of the invention, the chats of particulate is fed after+gravity treatment of a magnetic separation obtains concentrate and whipping
Ore grinding and two sections of re-selection procedures, greatly reduce ore grinding and the secondary treating capacity sorted, reduce energy consumption and equipment civil engineering is thrown
Money, reduces running cost.
8) process flow of the invention, the storage time of ore pulp storage tank are 6 hours, with broken-washup-screening-high pressure
Industry and the secondary gravity treatment of the secondary magnetic separation-of ore grinding-- working time flotation operation day difference one are elected to be during roller mill-magnetic separation-is primary
It causes, the inconsistent problem of the operating rate of effective solution crushing operation and grinding operation ensure that entire dressing plant's operation
Continuous-stable.And storage tank saves as the chats once sorted after smart whipping, and storage mine amount greatly reduces, reduces and deposits
The specification for storing up facility is conducive to the uniform stirring of ore pulp, and chats is particulate mine, will not be settled by stirring.
9) process flow of the invention obtains smart process relative to traditional stage grinding stage whipping, process end, this
The process of invention is directly obtained when grinding particle size is thicker in the first section sorted using weak magnetic+middle magnetic+dusting cover+elutriation magnetic separation process
Magnetic concentrate has been arrived, the strongly magnetic mineral in raw ore has been subjected to effective recycling if magnetic iron ore is in the first section sorted, has been avoided
When later period grinding particle size attenuates, pollution of the intergrowth of microfine to strongly magnetic mineral, obtaining grade is 62.97%, recycling
The good sorting index for the magnetic separation of iron ore concentrate that rate is 28.35%.The dressing method carries out ultimate mention to magnetic concentrate with magnetic separation is eluriated
Magnetic separation+gravity treatment the immixture for eluriating magnetic separation, effective grade that ensure that magnetic concentrate is adequately utilized in matter.
10) process flow of the invention, after every section of ore grinding with the method for gravity treatment to the coarse grain sand setting of thickness grading into
Gravity treatment of having gone obtain it is smart, the process gravity treatment use+selected+mixture length scanned of roughing, the advantageous product that ensure that gravity concentrate
Position and the rate of recovery；Obtaining grade in the middle section of process by gravity treatment is 60.97%, the gravity treatment iron that the rate of recovery is 21.56%
Concentrate and grade are 60.15%, and the secondary gravity treatment iron ore concentrate that the rate of recovery is 2.59% is not only filled using coarse particle gravity after thickness grading
Divide and spiral chute is utilized to the good sorting result of more coarse grained ore particle, it is thus also avoided that microfine intergrowth is to gravity concentrate
Pollution, the quality of gravity concentrate is effectively guaranteed.
11) for technique of the invention in the end of process by the overflow sludge of thickness grading twice, i.e. -0.043mm accounts for 90%
The mineral of microfine all feed secondary middle magnetic+strong magnetic+flotation process of end, ensure that magnetism first with middle magnetic and strong magnetic
The yield of mineral finally carries out whipping to microfine intergrowth with flotation, ensure that the grade of flotation concentrate, be finally obtained product
Position is 60%, and the flotation iron ore concentrate that the rate of recovery is 12.50% realizes the high efficiente callback to microfine sludge.
12) technique of the invention just stages of magnetic separation obtain it is smart, middle section gravity treatment obtain it is smart, end flotation obtain it is smart be classified to obtain Seiko skill,
The grade for being finally obtained magnetic separation gravity treatment mixing is 62%, and the rate of recovery is 52.5% iron ore concentrate I；It is 60% that flotation concentrate, which constitutes grade,
The iron ore concentrate II that the rate of recovery is 12.5%；Comprehensive recovery is up to 65%, and sorting index is much better than stage grinding stage whipping, process
End obtains smart process, obtains outstanding sorting index.
13) concentrate is divided into the iron ore concentrate I of grade 62% and the iron essence of grade 60% by process flow of the invention according to quality
Mine II, for I price of iron ore concentrate compared with High Availabitity in pellet feed, the relatively low raw material that can be used for being sintered of II price of iron ore concentrate is this
Products scheme not only increases integrated marketing income, and has expanded the market adaptability of iron ore concentrate.
It 14) is 10000 GS in the magnetic field strength that once strong magnetic is scanned of section at the beginning of process, high field intensity has fully ensured that magnetic mine
The recycling of object, it is advantageous to ensure that the rate of recovery；The magnetic field strength that the secondary strong magnetic in process end is scanned is 4000 GS, is conducive to portion
Divide intergrowth whipping when magnetic separation, ensure that the quality of final flotation concentrate.
Detailed description of the invention
Fig. 1 is broken, process flow chart of the invention.
Fig. 2 is schematic diagram of the present invention.
Specific embodiment
A specific embodiment of the invention is further illustrated with reference to the accompanying drawing.
As shown in Figure 1, 2, a kind of transition zone mixing iron ore beneficiation technique, it is characterised in that including by grade 41.8%, raw ore
The mixing iron ore of chats cement content 30% carry out three sections of crushing operations, a magnetic concentration working, a thickness grading cyclone operation,
Reselection operation, two sections of closed circuit grinding operations, secondary thickness grading cyclone operation, secondary reselection operation, secondary magnetic separation are made
Industry and reverse flotation work；The granularity be 1200mm-0mm raw ore feed by coarse crushing, in broken and fine crushing three formed section
Broken, pre-selection roller type sifting operation, the magnetic concentration working processing granularity is that 1 mm -0 mm enters to grind raw ore, described
Thickness grading operation handles the mixing magnetic middling ore of a magnetic separation, and a reselection operation handles a thickness grading
The sand setting product of cyclone operation, two sections of closed circuit grinding operations and the primary weight of secondary thickness grading cyclone operation processing
The tailing of choosing, secondary reselection operation handle the sand setting product of secondary thickness grading cyclone operation, the secondary magnetic concentration working
The overflow product of a thickness grading operation and the overflow product of secondary thickness grading cyclone operation are handled, at reverse flotation work
Manage secondary magnetic separation bulk concentrate.
As advanced optimizing for above scheme, it is that will produce the mixing that granularity is 1200mm-0mm that described three sections broken
Former iron ore feeds roller type sieving machine prescreening desliming, and the roller spacing of roller type sieving machine is 150mm；The sieve of+150mm after desliming
Upper product feed coarse crushing operation to rod-toothed crusher, product and roller type sieving machine to the 150mm-0 of rod-toothed crusher
Contain the merging of mud product under the sieve of 150mm-0 and feeds rotating cylinder log washer and drum sieve progress washup desliming and separating dry space from moist space；
The dry type on-the-sieve material of 150mm~36mm of the discharge drum sieve of rotating cylinder log washer feed in broken operation cone crusher
Machine；Gyratory crusher product feeds dry type double-deck screen shale shaker, broken formation closed circuit crushing in the oversize return of+36mm；Rotation
The wet type undersize material of 36mm~0mm of the discharge drum sieve of formula drum washer feeds wet type coarse grain single-deck vibrating screen and wet type
Particulate single-deck vibrating screen enter continuous two sections of wet screening operations, wet type coarse grain single-deck vibrating screen the undersize of 8mm~0 give
Enter the particulate single-deck vibrating screen of wet type.
Coarse crushing of the present invention is using roller type sieving machine+to rod-toothed crusher operation, big spacing roller of the sludge from roller type sieving machine
It is dropped between gap, avoids viscous viscous blocking of the sludge to subsequent coarse crushing operation, and the big roller spacing of roller spacing roller type sifting and to tooth
The big space width of roll crusher can also eliminate most of height and glue blocking of the aqueous sludge to equipment；Effective solution coarse crushing work
The blockage problem of industry.
The undersize of 2mm~0 of wet type particulate single-deck vibrating screen of the invention feeds cyclone group and dewatering screen enters
The coarse grain sand setting of the cyclone of continuous two-stage dewatering and graded operation, primary dewatering and graded operation feeds dewatering screen and carries out secondary
Dehydration and graded operation, the dewatering screen undersize return cyclone group of 0.5mm~0 form closed circuit；
In the dry type oversize of 36mm~8mm of wet type coarse grain single-deck vibrating screen, 36mm~8mm of dry type double-deck screen shale shaker
Between product merge feed operation fine crushing gyratory crusher enter it is fine crushing-screening closed-circuit operation；Fine crushing-closed circuit 12mm of screening~
0 product, the undersize of 8mm~0mm of dry type double-deck screen shale shaker, wet type particulate single-deck vibrating screen 8mm~2mm dry screen
Upper product, dewatering screen 2mm~0.5mm dehydration after oversize together constitute the product of 12mm~0 that yield is 70% and feed
High pressure roller mill-wet type single layer screening is closed circuit, and+1mm the product on wet type single-deck screen sub-sieve returns to high pressure roller mill；The granularity of cyclone
For -200 mesh 50%~60%, the fine fraction overflow slime product that yield is 30% feeds slurry concentrating pond, the underflow in slurry concentrating pond
The product of 1mm~0 under closed circuit sieve is sieved with high pressure roller mill-wet type single layer feed a weak magnetic operation together enter beneficiation flowsheet.
Technique crushing operation of the invention use coarse crushing+in broken+fine crushing+high pressure roller mill technique, relative to traditional
Coarse crushing+Semi-autogenous Grinding Technology increases broken operation number of segment, meets the energy saving principle of much broken and lessmill, reduces energy consumption.It eliminates
Semi-Autogenous operation has subtracted Semi-Autogenous ball consumption, has reduced the consumption of milling medium.
Ultrafine grinding is carried out using high pressure roller mill, the granularity of the final closed circuit product of high pressure roller mill is controlled as 0-1mm, sufficiently
The high feature of high pressure roller mill attrition crushing fine fraction product content is utilized, increases fine-graded contain while reducing energy consumption
Amount creates advantage for subsequent sort.
A magnetic concentration working of the present invention once sweeps magnetic using the primary middle primary strong magnetic roughing-of magnetic separation-of low intensity magnetic separation-
Choosing-dusting cover-elutriation magnetic dressing process；
The tailing of low intensity magnetic separation feeds magnetic separation in primary, it is primary in the tailing of magnetic separation feed primary strong magnetic roughing, high intensity magnetic separation
Tailing feeds primary strong magnetic and scans；Grade is 57.71%, and the weak magnetic concentrate selection and primary middle magnetic concentrate that the rate of recovery is 38.7% close
And dusting cover is fed for comprehensive concentrate, it is 62.97% that the undersize of 0.15mm~0 of dusting cover, which feeds and eluriates magnetic separation to obtain grade, recycling
The magnetic separation of iron ore concentrate that rate is 28.35%；Tailing, primary strong magnetic roughing and the concentrate that magnetic is scanned primary by force for eluriating magnetic separation are merged into
Grade is 42.55%, and the magnetic middling ore that the rate of recovery is 45.54% is concentrated to feed a thickness grading cyclone；Dusting cover+
The coarse grain sand setting of 0.15mm, grade 42.5%, oversize and a thickness grading cyclone that the rate of recovery is 15.0% are fed
Reselection operation, primary strong magnetic scan tailing and throw tail.
The low intensity magnetic separation and primary middle magnetic separation use drum magnetic separator, and the magnetic field strength of low intensity magnetic separation is 2000GS, once
The magnetic field strength of middle magnetic separation is 3500GS, and a high intensity magnetic separation is using the vertical strong magnetomechanical of ring pulsating；High intensity magnetic separation is using vertical ring arteries and veins
The magnetic field strength of the strong magnetomechanical of dynamic formula, primary strong magnetic roughing is 8000 GS, and the magnetic field strength that primary strong magnetic is scanned is 10000 GS.
High field intensity has fully ensured that the recycling of magnetic mineral, advantageous to ensure that the rate of recovery；
Process flow of the invention is in the first section sorted using weak magnetic+middle magnetic+dusting cover+elutriation magnetic separation process directly in ore grinding grain
Magnetic concentrate has been obtained when spending thicker, the strongly magnetic mineral in raw ore has been carried out if magnetic iron ore is in the first section sorted effective
Recycling, when avoiding later period grinding particle size and attenuating, pollution of the intergrowth of microfine to strongly magnetic mineral, obtaining grade is
62.97%, the good sorting index for the magnetic separation of iron ore concentrate that the rate of recovery is 28.35%.The dressing method is smart to magnetic separation with magnetic separation is eluriated
Mine carries out ultimate upgrading, is adequately utilized the magnetic separation+gravity treatment immixture for eluriating magnetic separation, effective to ensure that magnetic concentrate
Grade.
A reselection operation of the present invention using spiral chute roughing+spiral chute it is selected+spiral chute scans
Process, it is selected that the concentrate of a spiral chute roughing feeds a spiral chute, obtains the selected concentrate of a spiral chute, primary
The selected chats of spiral chute and a spiral chute cleaner tailings, the selected spiral chute of middling recurrence of a spiral chute
Selected to give mine, the tailing of a spiral chute roughing feeds a spiral chute and scans, a spiral chute cleaner tailings and one
Secondary spiral chute scavenger concentrate returns to a spiral chute roughing；The selected grade of spiral chute is 60.97%, the rate of recovery
A gravity treatment iron ore concentrate is constituted for 21.56% concentrate, the grade that a spiral chute is scanned is 34.55%, and the rate of recovery is
27.82% tailing feeds chats concentration basin, and the underflow of chats concentration basin feeds ore pulp storage tank, and the storage time of ore pulp storage tank is 6
Hour, ore pulp is pumped to ball milling by ore pulp storage tank and feeds that ball milling-cyclone is closed circuit, and ball milling-cyclone road -0.076mm accounts for 90%
Overflow product feed secondary thickness grading cyclone group；The coarse grain sand setting of secondary thickness grading cyclone group feeds secondary heavy
Choosing.
Present invention chats of particulate after+gravity treatment of a magnetic separation obtains concentrate and whipping feeds ore grinding and two sections of gravity treatments
Process greatly reduces ore grinding and the secondary treating capacity sorted, reduces energy consumption and equipment construction investment, reduce operating charges
With.
Secondary gravity treatment of the present invention using secondary spiral chute roughing+secondary spiral chute it is selected+secondary spiral slips
The process that slot is scanned, it is selected that the concentrate of secondary spiral chute roughing feeds secondary spiral chute, and it is selected to obtain secondary spiral chute
Concentrate, the selected chats of secondary spiral chute and secondary spiral chute cleaner tailings, the tailing of secondary spiral chute roughing feed two
Secondary spiral chute is scanned, and the selected middling recurrence secondary spiral chute of secondary spiral chute is selected, and secondary spiral chute is selected
The concentrate that tailing and secondary spiral chute are scanned returns to the roughing of secondary spiral chute；The selected grade of secondary spiral chute is
60.15%, the concentrate that the rate of recovery is 2.59% constitutes secondary gravity treatment iron ore concentrate；Thickness grading cyclone and secondary thickness grading
- the 0.043mm of cyclone accounts for 90%, grade 38.64%, and the rate of recovery is that 27.37% overflow product feeds secondary magnetic concentration working, and two
Secondary spiral chute gravity tailings throws tail.
It is 62% that magnetic concentrate, a gravity concentrate and secondary gravity concentrate of the invention, which collectively forms grade, and the rate of recovery is
52.5% iron ore concentrate I, I price of iron ore concentrate is compared with High Availabitity in pellet feed.
The present invention is advanced optimized as above scheme, a thickness grading cyclone and secondary thickness grading
- the 0.043mm of cyclone accounts for 90%, grade 38.64%, and the rate of recovery is that 27.37% overflow product feeds secondary magnetic concentration working, and two
Secondary magnetic concentration working is made of secondary middle magnetic separation and secondary high intensity magnetic separation, and the tailing of secondary middle magnetic separation feeds secondary high intensity magnetic separation, it is secondary in
The grade of magnetic separation and secondary high intensity magnetic separation is 44.65%, and the magnetic concentrate that the rate of recovery is 19.59% feeds flotation operation, secondary strong magnetic
It scans tailing and throws tail.
The secondary middle magnetic separation uses drum magnetic separator, and the magnetic field strength of secondary middle magnetic separation is 3500GS, secondary strong magnetic
Using the vertical strong magnetomechanical of ring pulsating, the magnetic field strength that secondary strong magnetic is scanned is 4000 GS for choosing, and high intensity magnetic separation is strong using vertical ring pulsating
Magnetomechanical.The present invention is 4000 GS in the magnetic field strength that the secondary strong magnetic in process end is scanned, and is conducive to part intergrowth in magnetic separation
When whipping, ensure that the quality of final flotation concentrate.
Flotation operation of the present invention is reverse flotation, and foam is tailing, and underflow is concentrate, using rough floatation, two
The process of secondary cleaner flotation, one selects the underflow of rough floatation to flow automatically to primary cleaning, and the underflow of a cleaner flotation is flow automatically floating to secondary fine
Choosing；The grade of secondary cleaner flotation is 60.0%, and the iron ore concentrate that the rate of recovery is 12.5% constitutes flotation iron ore concentrate, a rough floatation tail
Mine, a cleaner flotation tailing and secondary fine flotation tailing together constitute grade 26.17, the tailing of the rate of recovery 35%.
The regime of agent of the flotation is that 1500g/t is added to the PH regulator NaOH of mine in rough floatation, and 50g/t is to mine
Sodium hexametaphosphate dispersant, blistering and collecting agent MS-2715 of the 500g/t to mine.
Three sections of process before ore pulp storage tank of the present invention are crushed-screening-washup-gravity treatments of magnetic separation-one time of high pressure roller mill-one time
Operation system is consistent, works 16 hours for day;Secondary magnetic separation-the reverse flotation of process secondary grinding-secondary gravity treatment-after ore pulp storage tank
Operation system it is consistent, for day work 24 hours.Identical working system is used from coarse crushing to a magnetic separation, i.e., daily work
Time is 16 hours, creative by gravity treatment of a magnetic separation and broken-washup-screening-high pressure roller mill operation system one
It causes, avoids traditional process, the crushing operation time is less than the sorting operation time, sets to ensure that bulk storage need to be arranged in operating rate
Insurmountable settlement issues when Shi Shi, 0-1mm ore pulp, have ensured going on smoothly for entire production.
Technique of the invention in the end of process by the overflow sludge of thickness grading twice, i.e. -0.043mm account for 90% it is micro-
The mineral of particulate all feed secondary middle magnetic+strong magnetic+flotation process of end, ensure that magnetic mine first with middle magnetic and strong magnetic
The yield of object finally carries out whipping to microfine intergrowth with flotation, ensure that the grade of flotation concentrate, be finally obtained grade
It is 60%, the flotation iron ore concentrate II that the rate of recovery is 12.50% realizes the high efficiente callback to microfine sludge.Its flotation iron ore concentrate
The relatively low raw material that can be used for being sintered of II price, this products scheme not only increases integrated marketing income, and expands
The market adaptability of iron ore concentrate.
Primary strong magnetic scans tailing, and secondary strong magnetic scans tailing, secondary spiral chute gravity tailings, the common structure of flotation tailing
At grade 26.17, the tailing of the rate of recovery 35%.
The present invention is suitable for including magnetic iron ore, bloodstone, martite, limonite, goethite and part ferruginous clay
Mineral sort.
Claims (10)
1. a kind of transition zone mixing iron ore beneficiation technique, it is characterised in that including by grade 41.8%, raw ore chats cement content 30%
Mixing iron ore carry out three sections of crushing operations, a magnetic concentration working, a thickness grading cyclone operation, a reselection operation,
Two sections of closed circuit grinding operations, secondary thickness grading cyclone operation, secondary reselection operation, secondary magnetic concentration working and reverse flotation are made
Industry；The granularity be the raw ore of 1200mm-0mm feed by coarse crushing, in broken and fine crushing three formed section are broken, pre-selection roll-type sieve
It is allocated as industry, the magnetic concentration working processing granularity enters to grind raw ore for 1 mm -0 mm's, and a thickness grading is made
Industry handles the mixing magnetic middling ore of a magnetic separation, and a reselection operation handles the heavy of a thickness grading cyclone operation
Sand product, two sections of closed circuit grinding operations and secondary thickness grading cyclone operation handle the tailing of a gravity treatment, secondary
Reselection operation handles the sand setting product of secondary thickness grading cyclone operation, and the secondary magnetic concentration working handles thickness point
The grade overflow product of operation and the overflow product of secondary thickness grading cyclone operation, the secondary magnetic separation mixing of reverse flotation work processing
Concentrate.
2. transition zone mixing iron ore beneficiation technique according to claim 1, it is characterised in that described three sections broken be by
The mixing original iron ore that extraction granularity is 1200mm-0mm feeds roller type sieving machine prescreening desliming, the roller spacing of roller type sieving machine
For 150mm；The oversize of+150mm after desliming feed coarse crushing operation to rod-toothed crusher, to rod-toothed crusher
Contain the merging of mud product under the sieve of the 150mm-0 of the product and roller type sieving machine of 150mm-0 and feeds rotating cylinder log washer and circle
Shaft screen carries out washup desliming and separating dry space from moist space；The dry screen of 150mm~36mm of the discharge drum sieve of rotating cylinder log washer
Upper material feed in broken operation gyratory crusher；Gyratory crusher product feeds dry type double-deck screen shale shaker, produces on the sieve of+36mm
Broken formation closed circuit crushing in product return；The wet type undersize material of 36mm~0mm of the discharge drum sieve of rotating cylinder log washer
The particulate single-deck vibrating screen for feeding wet type coarse grain single-deck vibrating screen and wet type enters continuous two sections of wet screening operations, wet type coarse grain
The undersize of the 8mm of single-deck vibrating screen~0 feeds the particulate single-deck vibrating screen of wet type；
The undersize of 2mm~0 of wet type particulate single-deck vibrating screen feeds cyclone group and dewatering screen enters continuous two-stage dewatering
And graded operation, the coarse grain sand setting of the cyclone of primary dewatering and graded operation feed that dewatering screen carries out secondary dehydration and classification is made
Industry, the dewatering screen undersize return cyclone group of 0.5mm~0 form closed circuit；
In the dry type oversize of 36mm~8mm of wet type coarse grain single-deck vibrating screen, 36mm~8mm of dry type double-deck screen shale shaker
Between product merge feed operation fine crushing gyratory crusher enter it is fine crushing-screening closed-circuit operation；Fine crushing-closed circuit 12mm of screening~
0 product, the undersize of 8mm~0mm of dry type double-deck screen shale shaker, wet type particulate single-deck vibrating screen 8mm~2mm dry screen
Upper product, dewatering screen 2mm~0.5mm dehydration after oversize together constitute the product of 12mm~0 that yield is 70% and feed
High pressure roller mill-wet type single layer screening is closed circuit, and+1mm the product on wet type single-deck screen sub-sieve returns to high pressure roller mill；The granularity of cyclone
For -200 mesh 50%~60%, the fine fraction overflow slime product that yield is 30% feeds slurry concentrating pond, the underflow in slurry concentrating pond
The product of 1mm~0 under closed circuit sieve is sieved with high pressure roller mill-wet type single layer feed a weak magnetic operation together enter beneficiation flowsheet.
3. transition zone mixing iron ore beneficiation technique according to claim 1, it is characterised in that a magnetic concentration working
Magnetic separation-dusting cover-elutriation magnetic dressing process is once swept using the primary middle primary strong magnetic roughing-of magnetic separation-of low intensity magnetic separation-；
The tailing of low intensity magnetic separation feeds magnetic separation in primary, it is primary in the tailing of magnetic separation feed primary strong magnetic roughing, high intensity magnetic separation
Tailing feeds primary strong magnetic and scans；Grade is 57.71%, and the weak magnetic concentrate selection and primary middle magnetic concentrate that the rate of recovery is 38.7% close
And dusting cover is fed for comprehensive concentrate, it is 62.97% that the undersize of 0.15mm~0 of dusting cover, which feeds and eluriates magnetic separation to obtain grade, recycling
The magnetic separation of iron ore concentrate that rate is 28.35%；Tailing, primary strong magnetic roughing and the concentrate that magnetic is scanned primary by force for eluriating magnetic separation are merged into
Grade is 42.55%, and the magnetic middling ore that the rate of recovery is 45.54% is concentrated to feed a thickness grading cyclone；Dusting cover+
The coarse grain sand setting of 0.15mm, grade 42.5%, oversize and a thickness grading cyclone that the rate of recovery is 15.0% are fed
Reselection operation, primary strong magnetic scan tailing and throw tail.
4. transition zone mixing iron ore beneficiation technique according to claim 1, it is characterised in that a reselection operation
Using spiral chute roughing+spiral chute it is selected+process scanned of spiral chute, the concentrate of a spiral chute roughing feeds one
Secondary spiral chute is selected, obtains the selected concentrate of a spiral chute, the selected chats of a spiral chute and a spiral chute essence
Tailing is selected, the selected spiral chute of middling recurrence of a spiral chute is selected to give mine, the tailing of a spiral chute roughing
It feeds a spiral chute to scan, a spiral chute cleaner tailings and a spiral chute scavenger concentrate return to a spiral and slip
Slot roughing；The selected grade of spiral chute is 60.97%, and the concentrate that the rate of recovery is 21.56% constitutes a gravity treatment iron ore concentrate,
The grade that spiral chute is scanned is 34.55%, and the tailing that the rate of recovery is 27.82% feeds chats concentration basin, chats concentration basin
Underflow feed ore pulp storage tank, the storage time of ore pulp storage tank is 6 hours, and ore pulp feeds two sections of ball milling-rotations by ore pulp tank pump
Stream device is closed circuit, and the overflow product that two sections of ball millings-closed circuit -0.076mm of cyclone accounts for 90% feeds secondary thickness grading cyclone
Group；The coarse grain sand setting of secondary thickness grading cyclone group feeds secondary gravity treatment.
5. transition zone mixing iron ore beneficiation technique according to claim 1, it is characterised in that the secondary gravity treatment uses
Secondary spiral chute roughing+secondary spiral chute is selected+process scanned of secondary spiral chute, the essence of secondary spiral chute roughing
It is selected that mine feeds secondary spiral chute, obtains the selected concentrate of secondary spiral chute, the selected chats of secondary spiral chute and secondary spiral shell
Chute cleaner tailings is revolved, the tailing of secondary spiral chute roughing feeds secondary spiral chute and scans, and secondary spiral chute is selected
Middling recurrence secondary spiral chute is selected, and the concentrate that the selected tailing of secondary spiral chute and secondary spiral chute are scanned returns to two
Secondary spiral chute roughing；The selected grade of secondary spiral chute is 60.15%, and the concentrate that the rate of recovery is 2.59% constitutes secondary gravity treatment
Iron ore concentrate, secondary gravity concentrate, magnetic concentration working elutriation magnetic separation concentrate and a gravity concentrate collectively form grade and be
62%, the rate of recovery is 52.5% iron ore concentrate I；Secondary spiral chute gravity tailings throws tail.
6. transition zone mixing iron ore beneficiation technique according to claim 4, it is characterised in that a thickness grading
- the 0.043mm of cyclone and secondary thickness grading cyclone accounts for 90%, and grade 38.64%, the rate of recovery is 27.37% overflow product
Secondary magnetic concentration working is fed, secondary magnetic concentration working is made of secondary middle magnetic separation and secondary high intensity magnetic separation, and the tailing of secondary middle magnetic separation is given
Enter secondary high intensity magnetic separation, the grade of secondary middle magnetic separation and secondary high intensity magnetic separation is 44.65%, and the magnetic concentrate that the rate of recovery is 19.59% is given
Enter flotation operation, secondary strong magnetic scans tailing and throws tail.
7. transition zone mixing iron ore beneficiation technique according to claim 1, it is characterised in that the flotation operation is anti-
Flotation, foam are tailing, and underflow is concentrate, using the process of a rough floatation, cleaner flotation twice, one select the underflow of rough floatation from
It flows to primary cleaning, the underflow of a cleaner flotation is flow automatically to secondary cleaner flotation；The grade of secondary cleaner flotation is 60.0%, the rate of recovery
Flotation iron ore concentrate, that is, iron ore concentrate II is constituted for 12.5% iron ore concentrate, the regime of agent of the flotation is that rough floatation is added
PH regulator NaOH, 50g/t sodium hexametaphosphate dispersant to mine of the 1500g/t to mine, blistering and collecting of the 500g/t to mine
Agent MS-2715.
8. transition zone mixing iron ore beneficiation technique according to claim 4, it is characterised in that the process three before ore pulp storage tank
The operation system that section is crushed-screening-washup-gravity treatment of magnetic separation-one time of high pressure roller mill-one time is consistent, works 16 hours for day;Ore pulp
The operation system of the secondary magnetic separation-reverse flotation of process secondary grinding-secondary gravity treatment-after storage tank is consistent, works 24 hours for day.
9. transition zone mixing iron ore beneficiation technique according to claim 3, it is characterised in that the low intensity magnetic separation and primary
Middle magnetic separation uses drum magnetic separator, and the magnetic field strength of low intensity magnetic separation is 2000GS, it is primary in the magnetic field strength of magnetic separation be 3500GS, one
Secondary high intensity magnetic separation is using the vertical strong magnetomechanical of ring pulsating；High intensity magnetic separation is using the vertical strong magnetomechanical of ring pulsating, the magnetic of primary strong magnetic roughing
Field intensity is 8000 GS, and the magnetic field strength that primary strong magnetic is scanned is 10000 GS.
10. transition zone mixing iron ore beneficiation technique according to claim 6, it is characterised in that the secondary middle magnetic separation is adopted
With drum magnetic separator, the magnetic field strength of secondary middle magnetic separation is 3500GS, and secondary high intensity magnetic separation is secondary using the vertical strong magnetomechanical of ring pulsating
The magnetic field strength that strong magnetic is scanned is 4000 GS, and high intensity magnetic separation is using the vertical strong magnetomechanical of ring pulsating.
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| CN111644261A (en) * | 2020-06-10 | 2020-09-11 | 云南九州再生资源开发有限公司 | Red mud iron separation method |
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| CN112916197A (en) * | 2021-01-28 | 2021-06-08 | 内蒙古金陶股份有限公司 | Pretreatment method before ore processing |
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Application publication date: 20190611 |