CN105728204A - Selective flocculation separation process for micro-fine particle coking coal - Google Patents
Selective flocculation separation process for micro-fine particle coking coal Download PDFInfo
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- CN105728204A CN105728204A CN201610170153.XA CN201610170153A CN105728204A CN 105728204 A CN105728204 A CN 105728204A CN 201610170153 A CN201610170153 A CN 201610170153A CN 105728204 A CN105728204 A CN 105728204A
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- flocculation
- ore pulp
- coking coal
- microfine
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D3/00—Differential sedimentation
- B03D3/06—Flocculation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
- B03D1/14—Flotation machines
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Abstract
The invention relates to a selective flocculation separation process for micro-fine particle coking coal. The selective flocculation separation process is suitable for coal washing. The process includes the steps that firstly, ore pulp, a flocculating agent and a dispersing agent are fed into a stirring device for intense stirring for 2 minutes, and the ore pulp is sufficiently dispersed; secondly, gentle stirring is carried out for 2 minutes, and target ore grains and parts of non-target particles have the flocculation phenomenon under the effect of the flocculating agent; the ore pulp is subject to intense stirring for 2 minutes again, and the parts of non-target particles are separated from active sites on flocculating agent molecules; during follow-up gentle stirring, exposed active sites are combined with the target ore grains, and the flocculating purifying process is completed; and the ore pulp obtained after flocculating is fed into a countercurrent air inflation type flotation column to be subject to separated operation in the static environment, and the micro-fine particle mineral separation is completed. The selective flocculation separation process solves the problem that the hybrid flocculent phenomenon exists, coal flocculation and gangue flocculation avoiding are achieved to the maximum degree, and damage to flocculation clusters is avoided; the process is simple in technological process, less in investment and low in running cost; and scarce coking coal resources are effectively recovered.
Description
Technical field
The present invention relates to the sorting process of a kind of coal, the selective flocculation sorting process of the microfine coking coal used when being particularly suited for coking coal microfine grain sorting.
Background technology
The present invention is based on the practical technique of the broken selective flocculation of microfine coking coal, and main purpose is to solve microfine grain sorting problem, reclaims rare coking coal resource.
Microfine granule Producing reason has following several, on the one hand along with the improving constantly of China's mechanical coal mining degree, Resource geology condition continue worsen and heavy media coal separation technology is in the extensive use of coal preparation plant, the selected ature of coal of China is constantly deteriorated, the fine-graded coal slime ratio produced in assorting room sharply increases, coal presents the feature of " lean, thin, assorted " gradually, and in continuing the trend of deterioration.On the other hand due to coal in forming process low ash particle and high ash spoil usually with the less mutual embedding cloth of granularity, when existing sorting process, this part coal is produced often as a kind of product, coal and floating tail-coal in coking, the requirement that both products do not reach coking due to its ash uses often as thermal coal, wastes the coking coal resource of preciousness.If low ash cleaned coal therein being reclaimed in its choosing again of dissociating, due to the embedding cloth characteristic of its relatively low granularity, it is often necessary to the rank of its ore grinding to micron just can make it farthest be dissociated.The conventional most widely used sorting technology of coal processing micro-size fraction is flotation, but effective lower limit of flotation is generally 0.045 (0.074) mm, and during lower than this value, flotation effect is deteriorated significantly.Therefore microfine is carried out the contradiction between an urgent demand and the existing particulate treatment technology that sorting is reclaimed, develops a kind of technology for fine-grained gold deposit extremely urgent.
Summary of the invention
For above-mentioned technical problem, it is provided that a kind of method is simple, and feasibility is strong, the selective flocculation sorting process of the microfine coking coal of good separation effect.
For realizing above-mentioned technical purpose, the selective flocculation sorting process of the order microfine coking coal of the present invention, it is characterised in that: it is made up of strong stirring, gentle agitation, again strong stirring, again gentle agitation and flotation five part；
A. first ore pulp, flocculant and dispersant are fed agitating device and carry out strong stirring 2 minutes, make ore pulp fully dispersed；
B. to ore pulp fully dispersed after strong stirring and then gentle agitation 2 minutes, make purpose ore particle and part non-purpose granule that flocculation phenomenon to occur under the effect of flocculant；
C. the ore pulp that flocculation phenomenon occurs is carried out again the strong stirring of 2 minutes, makes the non-purpose granule of part in ore pulp separate with the avtive spot on flocculating agent molecule；
D. finally again ore pulp is carried out gentle agitation, and make the avtive spot exposed be combined with purpose ore particle in stirring, complete the purification process of flocculation；
E. the ore pulp after the purification of flocculation is fed flotation column in static environment, is easily separated operation, complete the sorting of fine-particle minerals.
Described whipping process utilizes agitator to complete, and agitator is furnished with converter, and rotating speed can regulate；Described strong stirring refers to that high rotating speed stirs；Described gentle agitation refers to that the relatively slow-speed of revolution is stirred；Described flotation column is adverse current pneumo type flotation post；Hocketed by two kinds of alr modes, it is achieved the efficient flocculating to low ash microfine, farthest reduce assorted wadding phenomenon.
Beneficial effect: 1. use strong stirring and gentle agitation to hocket, solve assorted wadding phenomenon, farthest realizes the selective flocculation of " wadding coal do not wad a quilt with cotton spoil "；2. adverse current Static Flotation Column is applied to the ore pulp after sorting flocculation, and its good static environment avoids the destruction to floc sedimentation；3. sorting process flow process is simple, small investment, operating cost are low, remarkable in economical benefits, it is achieved that the efficient recovery to rare coking coal resource.
Accompanying drawing explanation
Fig. 1 is sorting process FB(flow block) of the present invention.
Fig. 2 is the equipment contact figure of sorting process of the present invention, wherein:
In Fig. 2: 1-microfine coking coal, 2-flocculant, 3-dispersant, 4,5,6,7-size mixing after ore pulp, 8-floatation clean coal, 9-floating tail-coal, A, B, C, D-agitating device, E-adverse current Static Flotation Column.
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is further detailed:
As depicted in figs. 1 and 2, the selective flocculation sorting process of the microfine coking coal of the present invention, step is as follows: it utilizes agitator to be made up of strong stirring, gentle agitation, again strong stirring, again gentle agitation and flotation five part, and described strong stirring refers to that high rotating speed stirs；Described gentle agitation refers to that the relatively slow-speed of revolution is stirred；
A. first the aid for Micro-fine Coal Slurry Dewatering 1 produced after coal in coking or floating tail-coal ore grinding, flocculant 2 are fed agitator A together with dispersant 3 and carry out strong stirring 2 minutes so that ore pulp is fully dispersed under high intensity stirs；
B., ore pulp 4 fully dispersed after strong stirring feeds agitator B and then gentle agitation 2 minutes, and there is flocculation with the non-purpose granule of small part and flocculant 2 in the purpose granule in ore pulp in gentle environment；
C. to occur flocculation phenomenon ore pulp 5 is fed the agitator C strong stirring again carried out 2 minutes, under this condition, the major part non-target minreal granule more weak with flocculant 2 molecular binding affinities and small part target minreal granule split away off from flocculant 2 molecule, and flocculant 2 molecule overhead goes out avtive spot；；
D. finally ore pulp 6 feeds agitator D again carries out gentle agitation, and makes the avtive spot exposed be combined with purpose ore particle in stirring, so far completes selective flocculation process；
E. the ore pulp 7 after flocculation is fed adverse current pneumo type flotation post E to sort, obtain floatation clean coal 8 and 9 two kinds of products of floating tail-coal.Described flotation column is adverse current pneumo type flotation post.
Hocketed by two kinds of alr modes, it is achieved the efficient flocculating to low ash microfine, farthest reduce assorted wadding phenomenon.
Claims (5)
1. the selective flocculation sorting process of a microfine coking coal, it is characterised in that step is: it is made up of strong stirring, gentle agitation, again strong stirring, again gentle agitation and flotation five part；
A. first ore pulp, flocculant and dispersant are fed agitating device and carry out strong stirring 2 minutes, make ore pulp fully dispersed；
B. to ore pulp fully dispersed after strong stirring and then gentle agitation 2 minutes, make purpose ore particle and part non-purpose granule that flocculation phenomenon to occur under the effect of flocculant；
C. the ore pulp that flocculation phenomenon occurs is carried out again the strong stirring of 2 minutes, makes the non-purpose granule of part in ore pulp separate with the avtive spot on flocculating agent molecule；
D. finally again ore pulp is carried out gentle agitation, and make the avtive spot exposed be combined with purpose ore particle in stirring, complete the purification process of flocculation；
E. the ore pulp after the purification of flocculation is fed flotation column in static environment, is easily separated operation, complete the sorting of fine-particle minerals.
2. the selective flocculation sorting process of a kind of microfine coking coal according to claim 1, it is characterised in that: described whipping process utilizes agitator to complete, and agitator is furnished with converter, and rotating speed can regulate.
3. the selective flocculation sorting process of a kind of microfine coking coal according to claim 1, it is characterised in that: described strong stirring refers to that high rotating speed stirs；Described gentle agitation refers to that the relatively slow-speed of revolution is stirred.
4. the selective flocculation sorting process of a kind of microfine coking coal according to claim 1, it is characterised in that: described flotation column is adverse current pneumo type flotation post.
5. the selective flocculation sorting process of a kind of microfine coking coal according to claim 1, it is characterised in that: hocketed by two kinds of alr modes, it is achieved the efficient flocculating to low ash microfine, farthest reduce assorted wadding phenomenon.
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| CN201610170153.XA CN105728204B (en) | 2016-03-22 | 2016-03-22 | A kind of selective flocculation sorting process of microfine coking coal |
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| CN201610170153.XA CN105728204B (en) | 2016-03-22 | 2016-03-22 | A kind of selective flocculation sorting process of microfine coking coal |
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| CN105728204B CN105728204B (en) | 2018-04-03 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108311291A (en) * | 2018-01-08 | 2018-07-24 | 中国恩菲工程技术有限公司 | A kind of method of iron ore concentrate desulfurization |
| CN111111270A (en) * | 2020-01-06 | 2020-05-08 | 中国矿业大学 | Novel flocculating agent and ore pulp stirring and mixing process and device |
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| CA2172028A1 (en) * | 1996-03-18 | 1997-09-19 | Olev Trass | Flotation of oil-agglomerated coal for ash and pyrite removal-simultaneous grinding and agglomeration |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108311291A (en) * | 2018-01-08 | 2018-07-24 | 中国恩菲工程技术有限公司 | A kind of method of iron ore concentrate desulfurization |
| CN111111270A (en) * | 2020-01-06 | 2020-05-08 | 中国矿业大学 | Novel flocculating agent and ore pulp stirring and mixing process and device |
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| CN105728204B (en) | 2018-04-03 |
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