CN107537696A - A kind of Fine particle processing direct reverse flotation purifying technique - Google Patents
A kind of Fine particle processing direct reverse flotation purifying technique Download PDFInfo
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Abstract
The invention discloses a kind of Fine particle processing direct reverse flotation purifying technique, and it includes once roughly grinding rougher process, regrinds six refining process and Treatment of Middling process for five times.The present invention combines positive and negative floatation process, and reverse flotation flowsheet is used since four times selected, and obtained final concentrate fixes carbon content 90~92%, the concentrate rate of recovery 85~86%.The present invention replaces traditional direct flotation flow using graphite direct reverse flotation flow, reverse floatation process is used in the rear stage of cleaning technological flowasheet, the entrainment of gangue mineral caused by meticulous mog can effectively being reduced, it especially can effectively reduce the entrainment of the silicate gangue minerals such as mica in concentrate, quartz, improve concentrate and fix carbon content, optimize Fine particle processing ore-dressing technique, reduce subsequent chemistry purifying technique production cost, a new thought is provided for Fine particle processing purifying technique.
Description
Technical field
The invention belongs to purification by mineral technical field, and in particular to a kind of Fine particle processing direct-reverse flotation purifying technique.
Background technology
" twentieth century is the century of silicon, and 21st century is the century of carbon ", graphite is important nonmetal mineral resource,
The every field of national economy can be applied to, there is highly important industrial value.The function admirable of graphite, in industrial materials
In application about 200 years history.As important economic materials, metallurgy, casting, machine-building, chemical industry, electrically,
The application of the traditional industry such as weaving, atomic energy department is quite varied.
Chinese graphite resource rich reserves, resource potential are huge.In Chinese Scaly graphite resource, the crystalloid more than 70%
Graphite resource is Fine particle processing, and the Scaly graphite resource only less than 30% is flaky graphite resource.With science and technology
Continuous progress and flaky graphite resource a large amount of consumption, modern graphite industry has not only been satisfied with to big scale stone
The demand of ink, the development and utilization of Fine particle processing ore deposit are increasingly taken seriously.
Graphite is the preferable nonmetallic mineral of native floatability, can remove most gangue mineral using flotation, at present
Flotation is in graphite ore dressing field using quite varied.In general, the concentrate requirement to graphite ore dressing is that it fixes carbon content
It is the higher the better with the rate of recovery, and for flaky graphite resource, it is also contemplated that the protection of scale.Flaky graphite processing is more
Using stage grinding-flotation flow, through repeatedly regrinding multiple dressing process, improve concentrate and fix carbon content.Multistage grinding is to press from both sides
Gangue (such as quartz, mica, pyroxene) between graphite flakes peels off as early as possible, reduces gangue mineral pair in grinding process
The destruction of graphite flakes.Repeatedly selected is to remove the gangue mineral dissociated as far as possible, obtains the stone of high fixed carbon content
Black concentrate.Flaky graphite ore beneficiation feasibility is typically better than thin scale, and flow is shorter, and the more difficult choosing of thin scale, and flow is relatively
It is long.
The crystalline flake graphite concentrate obtained for flotation, is partly used directly for industrial production, such as magnesia carbon brick, casting sand
It is exactly directly using crystalline flake graphite concentrate as raw material, still, most of concentrate needs to use after being purified, and such as expands stone
Ink, lithium battery graphite cathode material etc., particularly some high-end purposes, such as Nuclear grade graphite, high-end lubricating oil, ultra-thin ultrapure
Conductive heat conducting material etc., these industries require very high to the fixed carbon of crystalline flake graphite raw material.The side of industrial graphite purification at present
Method mainly has three kinds：Alkali acid system, acid system and high temperature method；High temperature method is because cost is higher, and application is not very wide at present；Alkali acid system and
Acid system is using wide, but graphite fixes that carbon content is lower than acid system, and acid system is current most widely used stone after the purification of alkali acid system
Black purifying technique；Acid system is mainly to pass through the impurity in hydrofluoric acid dissolution crystalline flake graphite concentrate, if mica too high levels in concentrate,
Because hydrofluoric acid will have a greatly reduced quality compared with indissoluble solution mica, refining effect, cause after purification in graphite impurity content too high and limit
Its application is made.
For Fine particle processing, most ore dressing plants are still produced using the flow of stage grinding-stage flotation.Traditional
Problems be present in the flow of stage grinding-stage flotation：1) cleaning technological flowasheet leading portion, the intergrowth in concentrate is more, after regrinding
New explanation from intergrowth it is more, therefore selected after regrinding can improve concentrate by a relatively large margin and fix carbon content, and cleaning technological flowasheet
Back segment, as concentrate fixes the rise of carbon content, regrind rear new explanation from intergrowth tail off, therefore the fixation carbon content of concentrate carries
The amplitude risen is smaller；2) arteries and veins is caused for the thinner crystalline flake graphite of disseminated grain size, the back segment of cleaning technological flowasheet, meticulous mog
Stone entrainment is serious, and concentrate fixes carbon content and is difficult to improve；3) during direct flotation crystalline flake graphite, mica can be carried secretly with foam enters essence
Ore deposit, it is unfavorable for the deep processing and utilization of crystalline flake graphite concentrate.
The content of the invention
It is an object of the invention to provide a kind of method of Fine particle processing direct-reverse flotation purification, carried with reference to positive and negative flotation
Go out technique, use reverse flotation in the back segment of cleaning technological flowasheet, reduce the entrainment of the gangue mineral caused by meticulous mog, especially
It can effectively reduce the entrainment of the silicate gangue minerals such as mica in concentrate, quartz, improve concentrate and fix carbon content, optimize thin squama
Piece graphite mineral processing, reduce subsequent chemistry purifying technique production cost.
To achieve the above object, the technical solution adopted in the present invention is：
A kind of Fine particle processing direct-reverse flotation purifying technique, it comprises the following steps：
1) low-grade Fine particle processing raw ore is crushed, roughly ground, then add roughing inhibitor, direct flotation collecting
Agent, foaming agent carry out roughing, obtain rough concentrate and mine tailing a；
2) direct floatation process：Rough concentrate obtained by step 1) is once regrinded, it is floating that gained is once regrinded to product input
Machine is selected, direct flotation collecting agent is added and foaming agent carries out primary cleaning, obtain primary cleaning concentrate and chats b；Gained is smart successively
Concentrate selection progress is secondary to regrind, and in products therefrom input flotation device, adds direct flotation collecting agent and foaming agent carries out recleaning,
Obtain secondary concentrate and chats c；Recleaning concentrate is regrinded three times, in products therefrom input flotation device, and adds and top-ups
Select collecting agent and foaming agent to carry out triple cleaning, obtain triple cleaning concentrate and chats d；
3) reverse floatation process：By gained, concentrate regrind for four times three times, in products therefrom input flotation device, adds anti-floating
Select inhibitor and collecting agent in reverse floatation carry out four times it is selected, obtain four selected concentrate and froth pulp chats e；By four essences of gained
Concentrate selection regrind for five times, and products therefrom is rubbed in flotation device, adds reverse flotation inhibitor and collecting agent in reverse floatation carries out five
It is secondary selected, obtain five selected concentrate and froth pulp chats f；By in five selected concentrate input flotation devices of gained, add anti-floating
Select inhibitor and collecting agent in reverse floatation carry out six times it is selected, obtain graphite concentrate product and chats g；
4) direct flotation collecting agent will be added in mine tailing a obtained by step 1) and foaming agent carries out once purging selection, obtain chats a and tail
Ore deposit b；
5) gained chats a, chats b, chats c are merged, regrind for six times, direct flotation is added in products therefrom and is caught
Receive agent and foaming agent carry out it is secondary scan, obtain chats h and mine tailing c；By gained chats h return to step 1) in the roughing step,
And successively carry out step 1) in roughing, described three of step 2) regrind, three selected direct floatation process, step 3) described two
It is individual regrind, three selected reverse floatation process, obtain graphite concentrate product；Chats d and the chats a, chats b, chats c of this step are closed
And or merge with chats e step 6) described；
6) by gained chats e return to step 2) it is described once regrind in step, and carry out described three of step 2) again successively
Mill, three selected direct floatation process, step 3) be described two to regrind, three selected reverse floatation process, obtains the production of graphite concentrate
Product；
7) by gained chats f return to step 2) it is described it is secondary regrind in step, and carry out follow-up two of step 2) successively
Regrind, two selected direct floatation process, step 3) it is described two regrind, three selected reverse floatation process, obtain graphite concentrate
Product；
8) by gained chats g return to step 2) it is described regrind three times in step, and carry out follow-up one of step 2) successively
Regrind, a selected direct floatation process, step 3) it is described two regrind, three selected reverse floatation process, obtain graphite concentrate
Product.
In such scheme, the roughing inhibitor is quick lime.
In such scheme, the direct flotation collecting agent is kerosene；Foaming agent is 2# oil.
In such scheme, the collecting agent in reverse floatation presses (14~16) by lauryl amine and coco amine：5 mass ratio mixing and
Into；The present invention combine reverse floatation process, by the lauryl amine of gangue mineral collecting excellent performance and to graphite collecting performance compared with
The coco amine of difference is mixed, and is used cooperatively with reverse flotation inhibitor MF, can effectively facilitate the separation of graphite and gangue mineral,
Reduce the content of the constituent phases such as mica in gained concentrate.
In such scheme, the reverse flotation inhibitor is MF (polymethylene naphthalene disulfonate).
In such scheme, reagent combination that roughing technique described in step 1) uses for：Low-grade Fine particle processing per ton
2300~2500g of roughing inhibitor, 300~350g of direct flotation collecting agent, 140~160g of foaming agent are added in raw ore.
In such scheme, the ore milling concentration of rough grinding process described in step 1) is 63-67%, and mog is -0.074mm
Content is 90~95%.
In such scheme, the roughing concentration of the roughing technique is 20~25%, and the roughing flotation time is 5~7min.
In such scheme, crushing process described in step 1) is to be crushed to -2mm.
In such scheme, the concentration of regrinding once regrinded is 20~25%, and mog is that -0.045mm contents are
80~85%；The secondary concentration of regrinding regrinded is 15~20%, and mog is that -0.045mm contents are 90~95%；Three times again
Mill and the concentration of regrinding regrinded for four times are 10~15%, and mog is that -0.045mm contents are 94~97%；Regrind for five times
It is 5~10% to regrind concentration, and mog is that -0.045mm contents are 92~97%.
In such scheme, the primary cleaning concentration is 10~13%, and the primary cleaning time is 5~6min；Recleaning
Concentration is 6~8%, and the recleaning time is 4~5min；Triple cleaning concentration be 4~6%, the triple cleaning time be 4~
5min；Four selected concentration are 3~5%, four selected 4~5min of time；Five selected concentration are 2~4%, five times it is selected when
Between 3~4min；Six selected concentration are 2~3%, six selected 2~3min of time.
In such scheme, the reagent combination that is used in the primary cleaning and recleaning step for：It is per ton low-grade thin
The dosage of crystalline flake graphite raw ore direct flotation collecting agent is 130~140g, and the dosage of foaming agent is 60~80g；Triple cleaning step
The middle reagent combination used for：The dosage of low-grade Fine particle processing raw ore direct flotation collecting agent per ton is 80~100g, foaming
The dosage of agent is 30~50g.
In such scheme, the reagent combination that is used in four concentration steps for：Low-grade Fine particle processing per ton is former
The dosage of reverse flotation inhibitor is 2000~2200g in ore deposit, and the dosage of collecting agent in reverse floatation is 200~300g；Five essences
Select the reagent combination that is used in step for：The dosage of low-grade Fine particle processing raw ore reverse flotation inhibitor per ton be 1400~
1600g, the dosage of collecting agent in reverse floatation is 200~300g；The reagent combination used in six concentration steps for：It is per ton low
MF dosage is 400~600g in grade Fine particle processing raw ore, and the dosage of collecting agent in reverse floatation is 100~200g.
In such scheme, the once purging selection concentration is 13~15%, and it is 3~4min to scan the time.
In such scheme, the secondary concentration of scanning is 10~12%, and it is 4~5min to scan the time.
In such scheme, the once purging selection and it is secondary scan the reagent combination that uses for：Low-grade thin scale stone per ton
Direct flotation collector dosage is 130~140g in black raw ore, and frother dosages are 60~80g.
In such scheme, regrind concentration for described six times as 20~25%, mog be -0.045mm contents be 90~
95%.
In such scheme, carbon content is fixed in the Fine particle processing raw ore as 10~15%, mainly by graphite, quartz,
Pyrite, mica group and feldspathoid composition.
In such scheme, using jaw crusher or oppositely rolling roller crusher to low-grade Fine particle processing in the step A
Raw ore is crushed.
In such scheme, process is roughly ground and regrinded using conical ball mill.
In such scheme, the roughing, flotation are selected and to scan flotation device used in process be RK/FD type single-trough flotating machines.
In such scheme, the ore milling concentration, floatation concentration (roughing is selected) and concentration is scanned as solid (ore deposit in ore pulp
Thing) and liquid (water) mass ratio, represented with percent solids；The concentration of regrinding is the corresponding ore grinding for regrinding step
Concentration.
Compared with prior art, beneficial effects of the present invention are：
1) present invention combines positive and negative floatation process, using reverse floatation process instead of traditional in rear stage refining process
Direct floatation process, can reduce because meticulous mog cause the entrainment of gangue mineral the problem of, optimize Fine particle processing dresser
Skill, improve concentrate and fix carbon content, a new thought is provided for Fine particle processing purifying technique.
2), can be by the low-grade Fine particle processing of raw ore fixation carbon content 10~15% using the technological process of the present invention
Ore deposit purifies, and is fixed the graphite concentrate of carbon content 90~92%, and the graphite concentrate rate of recovery can reach 85~86%.
3) present invention uses MF to suppress for inhibitor to graphite, hydrophobic graphite surface is become hydrophilic；MF's
Main function group is nonpolar naphthalene nucleus, is adsorbed in graphite by Van der Waals force and mica surface forms physical absorption, and utilize
Collecting agent mixed amine is mingled with the adsorbance gap of material in graphite surface and mica, quartz surfaces etc., realizes graphite and gangue ore deposit
The content of the constituent phases such as mica in the separation of thing, effectively control gained concentrate；Compared with traditional flotation flowsheet, present invention gained essence
The fixation carbon content of ore deposit is improved；And reverse flotation can preferably control the content of mica in concentrate, be more beneficial for crystalline flake graphite
The deep processing and utilization of concentrate.
Brief description of the drawings
Fig. 1 is Fine particle processing direct-reverse flotation purifying technique flow chart of the present invention；
Fig. 2 is the process chart of embodiment 2 of the present invention；
Fig. 3 is traditional Fine particle processing direct flotation purifying technique flow chart described in comparative example；
Fig. 4 is embodiment 2 of the present invention and the XRD of graphite concentrate product obtained by traditional direct flotation flow described in comparative example
Figure.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to embodiments, to the present invention
It is further elaborated.It should be appreciated that specific embodiment described herein is not used to limit only to explain the present invention
The fixed present invention.
In following examples, carbon content is fixed as 12.69% in the low-grade Fine particle processing raw ore used, mainly by stone
Ink, quartz, pyrite, mica group and feldspathoid composition.
In following examples, the collecting agent in reverse floatation of use presses 3 by lauryl amine and coco amine:1 mass ratio mixes
(mixed amine).
Embodiment 1
A kind of Fine particle processing direct-reverse flotation purifying technique, its process chart are shown in Fig. 1, comprised the following steps：
1) by after low-grade Fine particle processing crushing raw ore to -2mm, roughly ground, ore milling concentration 65%, mog
It is 92.17% for -0.074mm contents；The life of roughing inhibitor is added into low-grade Fine particle processing raw ore of the gained after levigate
Roughing is carried out after lime, direct flotation collecting agent kerosene and foaming agent 2# oil stirrings fully, roughing concentration is 25%, during roughing flotation
Between be 7min, rough concentrate and mine tailing a is made；Wherein, roughing reagent combination is to be added in low-grade Fine particle processing raw ore per ton
Quick lime 2400g, kerosene 308g and 2# oil 148g；
2) rough concentrate obtained by step 1) is once regrinded, it is 24.78% to regrind concentration, and mog is -0.045mm
Content is 81.15%, will once regrind product input flotation device, and be carried out after adding direct flotation collecting agent kerosene and foaming agent 2# oil
Primary cleaning, primary cleaning concentration are 10.86%, and the primary cleaning time is 6min, and primary cleaning concentrate and chats b is made；One
Secondary selected reagent combination is that the dosage of low-grade Fine particle processing raw ore kerosene per ton is 132g, and the dosage of 2# oil is 74g；Will system
Primary cleaning concentrate carry out it is secondary regrind, regrind concentration as 16.31%, mog is that -0.045mm contents are
94.69%, product input flotation device is regrinded by secondary, direct flotation collecting agent kerosene and foaming agent 2# oil stirrings is added, carries out
Recleaning, recleaning concentration are 6.10%, and the recleaning time is 5min, and recleaning concentrate and chats c is made；Its
In, recleaning reagent combination is that low-grade Fine particle processing raw ore kerosene dosage per ton is 132g, and the dosage of 2# oil is 74g；
Obtained recleaning concentrate is regrinded three times, it is 12.36% to regrind concentration, and mog is that -0.045mm contents are
96.31%, product input flotation device will be regrinded three times, and essence three times is carried out after adding direct flotation collecting agent kerosene and foaming agent 2# oil
Choosing, triple cleaning concentration are 4.29%, and the triple cleaning time is 5min, and triple cleaning concentrate and chats d is made；Triple cleaning medicine
Agent prescription is that the dosage of low-grade Fine particle processing raw ore kerosene per ton is 88g, and the dosage of 2# oil is 37g；
3) obtained triple cleaning concentrate regrind for four times, regrinds concentration as 10.38%, mog for-
0.045mm contents are 96.05%, regrind product input flotation device by four times, add reverse flotation inhibitor MF and reverse flotation collecting
Carried out after agent mixed amine four times it is selected, four selected concentration are 3.45%, four selected time 4min, and four selected concentrate are made
With froth pulp chats e；The use that four selected reagent combinations are low-grade Fine particle processing raw ore reverse flotation inhibitor MF per ton
Measure as 2000g, the dosage of collecting agent in reverse floatation mixed amine is 240g；Obtained four times selected concentrate regrind for five times, then
It is 9.35% to grind concentration, and mog is that -0.045mm contents are 95.29%, regrinds product input flotation device by five times, adds
Carried out after reverse flotation inhibitor MF and collecting agent in reverse floatation mixed amine five times it is selected, five selected concentration are 2.90%, five essences
Time 3min is selected, five selected concentrate and froth pulp chats f are made；Five selected reagent combinations are low-grade thin scale per ton
Graphite raw ore inhibitor MF dosage is 1500g, and the dosage of collecting agent in reverse floatation mixed amine is 200g；Will made from five times it is selected
Concentrate puts into flotation device, add after reverse flotation inhibitor MF and collecting agent in reverse floatation mixed amine carry out six times it is selected, six times are selected
Concentration is 2.44%, six selected time 3min, and final graphite concentrate product and chats g is made；Six times selected reagent combination is
Low-grade Fine particle processing raw ore reverse flotation inhibitor MF per ton dosage is 500g, and the dosage of collecting agent in reverse floatation mixed amine is
100g；
4) addition direct flotation collecting agent kerosene and foaming agent 2# oil progress once purging selections into mine tailing a obtained by step 1), one
Secondary concentration of scanning is 14.33%, and it is 4min to scan the time, obtains chats a and mine tailing b；It is per ton low-grade to scan reagent combination
Fine particle processing raw ore kerosene dosage is 132g, and 2# oil dosage is 74g；
5) obtained chats a, chats b, chats c and chats d are merged, regrind for six times, regrind concentration six times
For 21.62%, mog is that -0.045mm contents are 91.38%, regrinds addition direct flotation collecting agent in products therefrom six times
Kerosene and foaming agent 2# oil carry out it is secondary scan, for secondary concentration of scanning for 10.39%, it be 4min to scan the time, be made chats h with
Mine tailing c；Wherein, secondary reagent combination of scanning is that low-grade Fine particle processing raw ore kerosene dosage per ton is 132g, 2# oil dosages
For 74g；By gained chats h return to step 1) in the roughing step, and it is described to carry out the roughing in step 1), step 2) successively
Three regrind, three selected direct floatation process, step 3) it is described two regrind, three selected reverse floatation process, obtain graphite
Concentrate product；
6) by gained chats e return to step 2) it is described once regrind in step, and carry out described three of step 2) again successively
Mill, three selected direct floatation process, step 3) be described two to regrind, three selected reverse floatation process, obtains the production of graphite concentrate
Product；
7) obtained the secondary of chats f return to step B is regrinded in step, and three carried out successively in step B regrind,
Five refining process, final graphite concentrate product is made；
8) by gained chats g return to step 2) it is described regrind three times in step, and carry out follow-up one of step 2) successively
Regrind, a selected direct floatation process, step 3) it is described two regrind, three selected reverse floatation process, obtain graphite concentrate
Product.
The purification index of the present embodiment products obtained therefrom is shown in Table 1.
The gained refined product index of 1 embodiment of table 1
| Product | Yield/% | Fixed carbon content/% | The rate of recovery/% |
| Graphite concentrate product | 11.05 | 91.81 | 85.69 |
| Mine tailing b | 50.13 | 0.84 | 3.56 |
| Mine tailing c | 38.82 | 3.28 | 10.75 |
| It is total | 100 | 11.84 | 100 |
Embodiment 2
A kind of Fine particle processing direct-reverse flotation purifying technique, its process chart are shown in Fig. 2, comprised the following steps：
1) by after low-grade Fine particle processing crushing raw ore to -2mm, roughly ground, ore milling concentration 65%, mog
It is 90.25% for -0.074mm contents；The life of roughing inhibitor is added into low-grade Fine particle processing raw ore of the gained after levigate
Roughing is carried out after lime, direct flotation collecting agent kerosene and foaming agent 2# oil stirrings fully, roughing concentration is 25%, during roughing flotation
Between be 7min, rough concentrate and mine tailing a is made；Wherein, roughing reagent combination is to be added in low-grade Fine particle processing raw ore per ton
Quick lime 2400g, kerosene 320g and 2# oil 148g；
2) rough concentrate obtained by step 1) is once regrinded, it is 24.28% to regrind concentration, and mog is -0.045mm
Content is 82.37%, will once regrind product input flotation device, and be carried out after adding direct flotation collecting agent kerosene and foaming agent 2# oil
Primary cleaning, primary cleaning concentration are 12.23%, and the primary cleaning time is 6min, and primary cleaning concentrate and chats b is made；One
Secondary selected reagent combination is that the dosage of low-grade Fine particle processing raw ore kerosene per ton is 140g, and the dosage of 2# oil is 70g；Will system
Primary cleaning concentrate carry out it is secondary regrind, regrind concentration as 15.88%, mog is that -0.045mm contents are
92.03%, product input flotation device is regrinded by secondary, direct flotation collecting agent kerosene and foaming agent 2# oil stirrings is added, carries out
Recleaning, recleaning concentration are 6.55%, and the recleaning time is 5min, and recleaning concentrate and chats c is made；Its
In, recleaning reagent combination is that low-grade Fine particle processing raw ore kerosene dosage per ton is 140g, and the dosage of 2# oil is 70g；
Obtained recleaning concentrate is regrinded three times, it is 14.39% to regrind concentration, and mog is that -0.045mm contents are
94.27%, product input flotation device will be regrinded three times, and essence three times is carried out after adding direct flotation collecting agent kerosene and foaming agent 2# oil
Choosing, triple cleaning concentration are 4.36%, and the triple cleaning time is 5min, and triple cleaning concentrate and chats d is made；Triple cleaning medicine
Agent prescription is that the dosage of low-grade Fine particle processing raw ore kerosene per ton is 90g, and the dosage of 2# oil is 35g；
3) obtained triple cleaning concentrate regrind for four times, regrinds concentration as 12.01%, mog for-
0.045mm contents are 94.19%, regrind product input flotation device by four times, add reverse flotation inhibitor MF and reverse flotation collecting
Carried out after agent mixed amine four times it is selected, four selected concentration are 3.44%, four selected time 5min, and four selected concentrate are made
With froth pulp chats e；Four selected reagent combinations are that low-grade Fine particle processing raw ore MF per ton dosage is 2100g, are mixed
The dosage for closing amine is 250g；Obtained four times selected concentrate regrind for five times, it is 9.98% to regrind concentration, mog
It is 92.99% for -0.045mm contents, regrinds product input flotation device by five times, add reverse flotation inhibitor MF and reverse flotation is caught
Receive carries out after agent mixed amine five times it is selected, five selected concentration are 2.98%, five selected time 4min, obtained five selected essences
Ore deposit and froth pulp chats f；Five selected reagent combinations are that low-grade Fine particle processing raw ore MF per ton dosage is 1600g,
The dosage of mixed amine is 250g；Five selected concentrate input flotation devices, add inhibitor MF and collecting agent mixed amine by made from
Carry out afterwards six times it is selected, six selected concentration be 2.66%, six selected time 3min, and final graphite concentrate product is made with
Ore deposit g；Six selected reagent combinations are that low-grade Fine particle processing raw ore MF per ton dosage is 400g, and the dosage of mixed amine is
100g；
4) will in step 1) the mine tailing a add direct flotation collecting agent kerosene and foaming agent 2# oil carry out once purging selection, one
Secondary concentration of scanning is 13.16%, and it is 4min to scan the time, obtains chats a and mine tailing b；It is per ton low-grade to scan reagent combination
Fine particle processing raw ore kerosene dosage is 140g, and 2# oil dosage is 70g；
5) obtained chats a, chats b and chats c are merged, regrind for six times, regrinding concentration six times is
22.46%, mog is that -0.045mm contents are 90.53%, regrinds products therefrom and adds direct flotation collecting agent kerosene for six times
With foaming agent 2# oil carry out it is secondary scan, for secondary concentration of scanning for 10.57%, it be 4min to scan the time, obtained chats h and mine tailing
c；Wherein, secondary reagent combination of scanning is that low-grade Fine particle processing raw ore kerosene dosage per ton is 140g, and 2# oil dosages are
70g；By gained chats h return to step 1) in the roughing step, and the roughing in step 1), step 2) described three are carried out successively
It is individual regrind, three selected direct floatation process, step 3) it is described two regrind, three selected reverse floatation process, obtain graphite essence
Mineral products；
6) by gained chats d and e return to step 2) it is described once regrind in step, and carry out described three of step 2) successively
Regrind, three selected direct floatation process, step 3) it is described two regrind, three selected reverse floatation process, obtain graphite concentrate
Product；
7) obtained the secondary of chats f return to step B is regrinded in step, and three carried out successively in step B regrind,
Five refining process, final graphite concentrate product is made；
8) by gained chats g return to step 2) it is described regrind three times in step, and carry out follow-up one of step 2) successively
Regrind, a selected direct floatation process, step 3) it is described two regrind, three selected reverse floatation process, obtain graphite concentrate
Product.
The purification index of the present embodiment products obtained therefrom is shown in Table 2.
The gained refined product index of 2 embodiment of table 2
| Product | Yield/% | Fixed carbon content/% | The rate of recovery/% |
| Graphite concentrate product | 9.62 | 90.08 | 85.02 |
| Mine tailing b | 46.27 | 1.04 | 4.72 |
| Mine tailing c | 44.11 | 2.37 | 10.26 |
| It is total | 100 | 10.19 | 100 |
Comparative example
A kind of traditional direct flotation purifying technique of Fine particle processing, its process chart are shown in Fig. 3, wherein, including it is once thick
Mill rougher process, regrind seven refining process and Treatment of Middling process for six times；The corase grind roughing wherein used, one, two, three, four
Secondary to regrind, one, two, three is selected, and first and second to scan condition same as Example 1；4th, five, six dressing process, which use, top-ups
Choosing, agentia condition are identical with the triple cleaning condition of embodiment 1；Seven times selected not to add medicament.Chats a~d is carried out after merging
Regrind for seven times it is secondary scan process, chats e, f, g, h are back to one, two, three, four time and regrinded respectively, and chats i is back to roughing.
It is 89.22% that the final concentrate that the technique obtains, which fixes carbon content, slightly below the fixed carbon of the graphite concentrate obtained by the present invention
Content.
Fig. 4 is the gained graphite concentrate product of embodiment 1 (n- anti-floating flow) and comparative example (direct flotation flow) described tradition
The XRD spectrum of graphite concentrate product obtained by direct floatation process, as can be seen from Figure, using graphite obtained by traditional direct floatation process
Main gangue mineral is mica in concentrate, and the content of mica is far less than traditional direct flotation stream in present invention gained graphite concentrate
Journey, illustrate that n- anti-floating technique greatly reduces the entrainment of mica in concentrate.Mica is the arteries and veins of generally existing in crystalline flake graphite concentrate
Stone ore thing, while be also to endanger crystalline flake graphite deep processing maximum gangue mineral.During direct flotation crystalline flake graphite, mica can be with
Foam entrainment enters concentrate.
The above results show that the fixation phosphorus content and the rate of recovery of present invention gained graphite concentrate product are high；In addition it is of the invention
Traditional direct flotation flow is replaced using graphite direct-reverse flotation flow, reverse flotation is used in the rear stage of cleaning technological flowasheet, can be effective
The entrainment of the silicate gangue mineral such as mica, quartz in gained graphite concentrate is reduced, optimizes Fine particle processing ore-dressing technique, reduces
Subsequent chemistry purifying technique production cost.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.Within the spirit and principles of the invention, that is made any repaiies
Change, equivalent substitution, improvement etc., should be included in the scope of the protection.
Claims (10)
1. a kind of Fine particle processing direct-reverse flotation purifying technique, it comprises the following steps：
1) low-grade Fine particle processing raw ore is crushed, roughly ground, then added roughing inhibitor, direct flotation collecting agent, rise
Infusion carries out roughing, obtains rough concentrate and mine tailing a；
2) direct floatation process：Rough concentrate obtained by step 1) is once regrinded, primary cleaning, obtain primary cleaning concentrate and chats
b；By gained primary cleaning concentrate carry out it is secondary regrind, recleaning, obtain secondary concentrate and chats c；Recleaning concentrate is entered
Row is regrinded three times, triple cleaning, obtains triple cleaning concentrate and chats d；The primary cleaning, recleaning, triple cleaning technique
The middle floating agent used is direct flotation collecting agent and foaming agent；
3) reverse floatation process：By gained, concentrate regrind for four times three times, then adds reverse flotation inhibitor and reverse flotation collecting
Agent carry out four times it is selected, obtain four selected concentrate and froth pulp chats e；Four selected concentrate of gained regrind for five times,
Add reverse flotation inhibitor and collecting agent in reverse floatation carry out five times it is selected, obtain five selected concentrate and froth pulp chats f；To institute
Add reverse flotation inhibitor in five selected concentrate and collecting agent in reverse floatation carry out six times it is selected, obtain graphite concentrate product and in
Ore deposit g；
4) direct flotation collecting agent will be added in mine tailing a obtained by step 1) and foaming agent carries out once purging selection, obtain chats a and mine tailing b；
5) gained chats a, chats b, chats c are merged, regrind for six times, direct flotation collecting agent is added in products therefrom
With foaming agent carry out it is secondary scan, obtain chats h and mine tailing c；By gained chats h return to step 1) in the roughing step, and according to
It is secondary carry out step 1), 2), 3) in subsequent step, obtain graphite concentrate product；Chats d and the chats a, chats b, chats of this step
C merges or merged with chats e step 6) described；
6) by gained chats e return to step 2) it is described once regrind in step, and carry out successively step 2), 3) in follow-up step
Suddenly, graphite concentrate product is obtained；
7) by gained chats f return to step 2) it is described it is secondary regrind in step, and successively carry out step 2), 3) in follow-up step
Suddenly, graphite concentrate product is obtained；
8) by gained chats g return to step 2) it is described regrind three times in step, and carry out successively step 2), 3) in follow-up step
Suddenly, graphite concentrate product is obtained.
2. Fine particle processing direct-reverse flotation purifying technique according to claim 1, it is characterised in that the direct flotation is caught
Receipts agent is kerosene；Foaming agent is 2# oil.
3. Fine particle processing direct-reverse flotation purifying technique according to claim 1, it is characterised in that the reverse flotation is caught
Receive agent and (14~16) are pressed by lauryl amine and coco amine：5 mass ratio mixes；The reverse flotation inhibitor is MF.
4. Fine particle processing direct-reverse flotation purifying technique according to claim 1, it is characterised in that described in step 1)
The reagent combination that roughing technique uses for：Added in low-grade Fine particle processing raw ore per ton roughing inhibitor 2300~2500g,
300~350g of direct flotation collecting agent, 140~160g of foaming agent.
5. Fine particle processing direct-reverse flotation purifying technique according to claim 1, it is characterised in that described once to regrind
Regrind concentration as 20~25%, mog is that -0.045mm contents are 80~85%；The secondary concentration of regrinding regrinded is 15
~20%, mog is that -0.045mm contents are 90~95%；Regrind three times with regrind for four times regrind concentration for 10~
15%, mog is that -0.045mm contents are 94~97%；That regrinds for five times regrinds concentration as 5~10%, mog for-
0.045mm contents are 92~97%；Concentration is regrinded for described six times as 20~25%, mog be -0.045mm contents be 90~
95%.
6. Fine particle processing direct-reverse flotation purifying technique according to claim 1, it is characterised in that the primary cleaning
Concentration is 10~13%, and the primary cleaning time is 5~6min；Recleaning concentration be 6~8%, the recleaning time be 4~
5min；Triple cleaning concentration is 4~6%, and the triple cleaning time is 4~5min；Four times selected concentration is 3~5%, and four times selected
4~5min of time；Five selected concentration are 2~4%, five selected 3~4min of time；Six selected concentration are 2~3%, six
Secondary selected 2~3min of time.
7. Fine particle processing direct-reverse flotation purifying technique according to claim 1, it is characterised in that the primary cleaning
With the reagent combination that is used in recleaning step for：The dosage of low-grade Fine particle processing raw ore direct flotation collecting agent per ton is
130~140g, the dosage of foaming agent is 60~80g；The reagent combination used in triple cleaning step for：Low-grade thin squama per ton
The dosage of piece graphite raw ore direct flotation collecting agent is 80~100g, and the dosage of foaming agent is 30~50g.
8. Fine particle processing direct-reverse flotation purifying technique according to claim 1, it is characterised in that described four times selected
The reagent combination used in step for：In low-grade Fine particle processing raw ore per ton the dosage of reverse flotation inhibitor be 2000~
2200g, the dosage of collecting agent in reverse floatation is 200~300g；The reagent combination used in five concentration steps for：It is per ton low
The dosage of grade Fine particle processing raw ore reverse flotation inhibitor is 1400~1600g, the dosage of collecting agent in reverse floatation for 200~
300g；The reagent combination used in six concentration steps for：MF dosage is in low-grade Fine particle processing raw ore per ton
400~600g, the dosage of collecting agent in reverse floatation is 100~200g.
9. Fine particle processing direct-reverse flotation purifying technique according to claim 1, it is characterised in that the once purging selection
Concentration is 13~15%, and it is 3~4min to scan the time；The secondary concentration of scanning for 10~12%, scan the time for 4~
5min；The once purging selection and it is secondary scan the reagent combination that uses for：Direct flotation in low-grade Fine particle processing raw ore per ton
Collector dosage is 130~140g, and frother dosages are 60~80g.
10. Fine particle processing direct-reverse flotation purifying technique according to claim 1, it is characterised in that the thin scale stone
It is 10~15% that carbon content is fixed in black raw ore, is mainly made up of graphite, quartz, pyrite, mica group and feldspathoid.
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| CN111841830A (en) * | 2020-06-28 | 2020-10-30 | 中国地质科学院郑州矿产综合利用研究所 | Low-grade middling sorting method for graphite ore |
| CN113083493A (en) * | 2021-04-12 | 2021-07-09 | 昆明理工大学 | Microwave roasting pretreatment graphite ore enhanced flotation purification method |
| CN114538430A (en) * | 2020-11-26 | 2022-05-27 | 鸡西市贝特瑞石墨产业园有限公司 | Method for purifying graphite, lithium ion battery cathode, lithium ion battery and electric equipment |
| CN114932009A (en) * | 2022-04-26 | 2022-08-23 | 武汉理工大学 | Comprehensive utilization method of low-grade large-scale graphite ore |
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