CN106669957A - Flotation technology for fine-grain middling coal - Google Patents
Flotation technology for fine-grain middling coal Download PDFInfo
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- CN106669957A CN106669957A CN201610446935.1A CN201610446935A CN106669957A CN 106669957 A CN106669957 A CN 106669957A CN 201610446935 A CN201610446935 A CN 201610446935A CN 106669957 A CN106669957 A CN 106669957A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B7/00—Combinations of wet processes or apparatus with other processes or apparatus, e.g. for dressing ores or garbage
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B1/00—Conditioning for facilitating separation by altering physical properties of the matter to be treated
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B5/00—Washing granular, powdered or lumpy materials; Wet separating
- B03B5/48—Washing granular, powdered or lumpy materials; Wet separating by mechanical classifiers
- B03B5/52—Spiral classifiers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B9/00—General arrangement of separating plant, e.g. flow sheets
- B03B9/005—General arrangement of separating plant, e.g. flow sheets specially adapted for coal
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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
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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
- B03D1/001—Flotation agents
- B03D1/004—Organic compounds
- B03D1/01—Organic compounds containing nitrogen
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Abstract
The invention relates to a flotation technology for fine-grain middling coal. The technology comprises the following steps: carrying out pulp mixing operation on the fine-grain middling coal; using coarse slime sorting equipment to carry out previous tailing discarding operation; using classifying equipment to carry out classification, and producing fine-grain coarse clean coal and coarse-grain coarse clean coal; using coal grinding equipment to dissociate the coarse-grain coarse clean coal; using pulp mixing equipment to carry out flotation operation on the fine-grain coarse clean coal; using rougher flotation equipment to carry out rougher flotation on ore pulp which is obtained after pulp mixing is carried out on the fine-grain coarse clean coal and producing rougher flotation clean coal; and using concentration equipment to carry out concentration on the rougher flotation clean coal and producing clean coal. The flotation technology provided by the invention is simple in process, mature in technology, low in investment, low in running fees and remarkable in economical benefit. The flotation technology not only ensures the ash content of tailings, but also ensures that materials with middle ash content and low ash content are fully dissociated. Gangue is prevented from entering a mill, so that the load of the mill is greatly reduced. Energy consumption is reduced, and the recycling rate of the tailings and the clean coal is increased.
Description
Technical field
The present invention relates to the floatation process technical field of coal, more particularly in a kind of particulate coal floatation process.
Background technology
The present invention is that, based on the broken practical technique selected again of coal in coking particulate, main purpose is to reclaim rare coking coal
Resource.
Rich coal resources in China, coal is complete, but each coal reserves differ greatly, and wherein coking coal resource reserves are not
To 1/3rd of gross reserves.Coal average yield is more than 30% in the coking of production every year of the Oversized Coking Coal Cleaning Plant of China, this
Coal does not reach the requirement of coking and uses often as thermal coal in the coking of part, and the irrational utilization of resource result in great wave
Take, therefore study coal dissociation in coking and select have great importance again.
Middle coal source has two kinds, and one is, because sharpness of separation is not high, to be formed by mispairing；Two is low ash extract coal and inorganic ore deposit
Often with superfine granularity mutually embedding cloth, coal selects again needs through further dissociation to thing component in this part.Domestic is many special
Family scholar selects again from the angle centering coal for improving sharpness of separation or dissociation and has carried out many beneficial explorations.Lv Yuting etc. is to high
Moral coal preparation plant individually sorts coal in jigging when transforming using a jigging machine, and final clean coal yield increased 6.76 percentage points,
Per year 1500000 tons of meters of feed coal, at least can increase benefit 20,000,000 yuan every year；Liu Junling etc. uses one section of two product dense medium eddy flow
Device to sort jigging in coal, make final clean coal yield improve 5.39%, increase profit more than 10,000,000 yuan.Zhao Wenda et al. is right
Coal has carried out dissociation and has selected experimental study again in Wuhai coal preparation plant dense medium, and the 3-0.5mm grades in crushed product are entered using TBS
Go sorting, obtain the cleaned coal that yield is 60%.But the middle coal thinner for disseminated grain size, conventional cracking and sorting is usually
Satisfied separation results cannot be obtained, this apoplexy due to endogenous wind coal generally requires coal-grinding and just can guarantee that a certain degree of solution to thinner granularity
From after such as Zhang Lei crushes to coal in the dense medium of head of the horse coal preparation plant, the big cone angle cyclone of 3-0.5mm grades Jing sorts clean coal yield
Only 4.22%, therefore again recovery of the selecting technology to coking coal resource is significant to develop coal in new particulate, it is following for dynamic
Power coal may carry out select again for middle coal and also have certain reference.
The content of the invention
In view of above-mentioned analysis, the present invention is intended to provide in a kind of particulate coal floatation process, to overcome therefrom coal in
The deficiency of the conventional art of low ash extract coal is reclaimed, fundamentally solving existing rare coking coal resource cannot recycling
Problem.
The purpose of the present invention is mainly achieved through the following technical solutions：
A kind of floatation process of coal in particulate, the flow process of the technique is as follows：
S1, carry out operation of sizing mixing, ore pulp after coal is sized mixing in output particulate using coal size mixing equipment in particulate；
S2, coal in particulate is sized mixing using separation of coarse slime equipment after ore pulp thrown tail operation in advance, output sorting is thick
Cleaned coal and sorting tail coal, sorting tail coal is used as gangue treatment；
S3, carry out graded operation, the coarse-fine coal of output particulate and the coarse-fine coal of coarse grain to sorting coarse-fine coal using classifying equipoment；
S41, dissociation operation is carried out to the coarse-fine coal of coarse grain using coal-grinding equipment, product and recycled after output mill；
S42, the coarse-fine coal of particulate is mixed with floating agent, operation of sizing mixing is carried out to mixture using size mixing equipment,
The coarse-fine coal of output particulate size mixing after ore pulp；
S5, the coarse-fine coal of particulate is sized mixing using roughing separation equipment after ore pulp carry out roughly selecting operation, output is roughly selected cleaned coal and is roughly selected
Tail coal；
S6, carry out selected operation, output cleaned coal and selected tail coal to roughly selecting cleaned coal using picking equipment.
The cleaned coal for needing further process that coarse-fine coal is that sorting is obtained is sorted, sorting tail coal is used directly as spoil,
Not think to possess and further process the value that cleaned coal is obtained.The coarse-fine coal of particulate is the less coarse-fine coal of particle diameter obtained after classification,
Because its particle diameter is less, thus flotation operation can be directly carried out；The coarse-fine coal of coarse grain is larger thick of the particle diameter that obtains after classification
Cleaned coal, because its particle diameter is larger, should not directly carry out that more spoil may be contained in flotation operation, and granule, so that
Further crushed so as to become the less granule of particle diameter, repeated graded operation, removed the impurity such as spoil therein, into
For the coarse-fine coal of particulate, carry out it is further selected.
The raw material of floating agent and by total weight percent proportioning be following one of which：
N-octyl alcohol 23%-33%, kerosene 62%-72%, alkylphenol polyoxyethylene 1%-2%, methyl isobutyl carbinol
1%-2%, dimethylbenzene 1%-2%；
N-butyl alcohol 27%-37%, kerosene 58%-68%, alkylphenol polyoxyethylene 1%-2%, methyl isobutyl carbinol
1%-2%, glycol polypropylene 1%-2%；
α-terpinol 30%-40%, Paraffin liquid heavy 55%-65%, alkylphenol polyoxyethylene 1%-2%, silicic acid
Sodium 1%-2%, glycol polypropylene 1%-2%.
Alkylphenol polyoxyethylene be ethers suds booster, methyl isobutyl carbinol, glycol polypropylene, glycol polypropylene
For hydroxy compound species suds booster, sodium silicate is silicate regulator.
Preferably, the raw material of floating agent and by total weight percent proportioning it is：N-octyl alcohol 26%, kerosene 70%, alkyl
Phenol polyethenoxy ether 1.2%, methyl isobutyl carbinol 1.3%, dimethylbenzene 1.5%.
Preferably, the raw material of floating agent and by total weight percent proportioning it is：N-butyl alcohol 31%, kerosene 65%, alkyl
Phenol polyethenoxy ether 1.6%, methyl isobutyl carbinol 1.1%, glycol polypropylene 1.3%.
Preferably, the raw material of floating agent and by total weight percent proportioning it is：α-terpinol 36%, Paraffin liquid heavy
59%th, alkylphenol polyoxyethylene 1.8%, sodium silicate 1.7%, glycol polypropylene 1.5%.
Paraffin liquid heavy is industrial products, and main component is that carbon atom number is more than or equal to 12 and is less than or equal in molecule
18 n-alkane and aromatic hydrocarbon.
Coal-grinding equipment is short body rod mill or short body autogenous tumbling mill.
It is as follows to the recycling mode of product after mill：
After mill product meet simultaneously density level less than 1.6kg/L, yield less than 10%, ash be less than 70% when, be back to
Flow process S3, using classifying equipoment graded operation is carried out to product after mill, and is sequentially completed flow process S41, S42, S5, S6；Otherwise, return
Be back to flow process S2, using separation of coarse slime equipment Throwing tail operations carried out to product after mill, and be sequentially completed flow process S3, S41, S42,
S5、S6。
Tail coal will be roughly selected to mix with selected tail coal, output tail coal.
Coal size mixing equipment is agitator in particulate；Agitator uses BGT series surface modification pulp mixing machines；
Separation of coarse slime equipment is spiral；Spiral uses high weir spiral classifier or sinking spiral
Grader；
Size mixing equipment is action of forced stirring device；
Roughing separation equipment is flotation device；
Picking equipment is flotation column；
Classifying equipoment is vibration sieve bend.
The slot size of vibration sieve bend is 0.5-1mm, to ensure siftage granularity in the range of suitable flotation；
The present invention has the beneficial effect that：
1st, the present invention proposes the floatation process of coal in a kind of flotation that dissociation is crushed based on middle coal, realizes to rare refining
The efficient recovery of coking coal resource.
2nd, spiral separating density is higher, can throw in advance under its optimal separating density except the broken dissociation of a part of Jing
The high ash material for going out, both ensure that tail coal ash, and while avoiding spoil enters grinding machine, significantly reduce the negative of grinding machine
Lotus, reduces energy consumption, alleviates the pollution to follow-up flotation operation after high ash material grinds.
3rd, the quick pan feeding of short body grinding machine, quick discharge, in both ensure that, low-ash material fully dissociated, and not
It is unfavorable for the overground phenomenon of follow-up flotation operation as generation.
4th, the action of forced stirring device of flotation operation can be fully dispersed by medicament, raising pharmacy effect effect, and due to
Scrubbing action of the high shear to coal particle surface, thin mud cover lid effect mitigates significantly.
5th, floating agent is mixed with by various medicaments, and the foaming effect of confection is substantially due to being used alone a kind of medicine
Effect of the agent as floating agent：Under the same terms, using the foam height of confection unit volume far above using independent
The foam height of medicament；Under the same terms, the life-span of the foam produced using confection compares what a kind of individually medicament was produced
The life-span of foam is longer.
6th, the recovery that operation ensure that low ash particle using flotation device is roughly selected, selected operation guarantees that flotation is selected using flotation column
Selecting property.
7th, flotation process proposed by the present invention is simple, technology maturation, small investment, operating cost are low, and economic benefit shows
Write.
Other features and advantages of the present invention will be illustrated in the following description, also, the partial change from description
Obtain it is clear that or being understood by implementing the present invention.The purpose of the present invention and other advantages can be by the explanations write
Specifically noted structure is realizing and obtain in book, claims and accompanying drawing.
Description of the drawings
Fig. 1 is flotation process figure according to the present invention.
Fig. 2 is the equipment schematic diagram of floatation process according to the present invention.
In Fig. 2, coal in 1 particulate, ore pulp after coal is sized mixing in 2 particulates, 3 sorting tail coals, the coarse-fine coal of 4 sortings, 5 coarse grain are coarse-fine
Coal, product after 6 mills, the coarse-fine coal of 7 particulates, 8 floating agents, the coarse-fine coal of 9 particulates size mixing after ore pulp, 10 roughly select cleaned coal, 11 cleaned coal, 12
Tail coal, A agitators, B spirals, C vibration sieve bends, the short body rod mills of D, E action of forced stirring devices, F flotation devices, G flotation
Post.
Specific embodiment
Below in conjunction with the accompanying drawings specifically describing the preferred embodiments of the present invention, wherein, accompanying drawing constitutes the application part, and
It is used to together with embodiments of the present invention explain the principle of the present invention.
Embodiment one
As shown in Fig. 2 the concrete flotation process of the present invention is as follows
S1, by granularity, coal 1 (raw material) feeds agitator A by feed pump (being not drawn in figure) in the particulate of below 3mm
Sized mixing, ore pulp 2 after coal is sized mixing in output particulate.
S2, coal in particulate is sized mixing after ore pulp 2 feed spiral B and carry out spiral and throw tail operation, the high ash spoil of output
Granule is used as sorting tail coal 3, while output and retaining the coarse-fine coal 4 of sorting；The ash of sorting tail coal 3 can reach 70% or so, make
For gangue treatment.
S3, the coarse-fine coal 4 of sorting is fed vibration sieve bend C and carries out graded operation, the slot size of vibration sieve bend is
0.5mm, about between 0.25-1mm, oversize is the coarse-fine coal 5 of coarse grain to partition size, and siftage is the coarse-fine coal 7 of particulate.
S41, the coarse-fine coal 5 of coarse grain is fed short body rod mill D carry out coal-grinding dissociation, product 6 after output mill, by controlling mill
The coal time so that product 6 is in below 0.5mm after mill but is unlikely to overground phenomenon.Product meets density level simultaneously after mill
When being less than 70% less than 10%, ash less than 1.6kg/L, yield, flow process S3 is back to, product after mill is entered using classifying equipoment
Row graded operation, and it is sequentially completed flow process S41, S42, S5, S6；Otherwise, flow process S2 is back to, using separation of coarse slime equipment pair
Product carries out Throwing tail operations after mill, and is sequentially completed flow process S3, S41, S42, S5, S6.
S42, the coarse-fine coal 7 of particulate and floating agent 8 are fed into action of forced stirring device E carry out operation of sizing mixing, output particulate is thick
Cleaned coal size mixing after ore pulp 9.
S5, the coarse-fine coal of particulate is sized mixing after ore pulp 9 feed flotation device F and carry out roughly selecting operation first, pan feeding pulp density is
80g/L, Jing flotation device F roughly selects output ash roughly selecting cleaned coal 10 and roughly select tail coal for 14-15%.
S6, cleaned coal 10 will be roughly selected feed flotation column G and carry out selected operation, output cleaned coal 11 and selected tail coal, cleaned coal 11 will be most
Whole ash is 12.5% or so, and selected tail coal mixes output tail coal 12 with tail coal is roughly selected.
Floating agent use quality percentage ratio：N-octyl alcohol 28%, kerosene 67%, alkylphenol polyoxyethylene 1.9%, methyl
Isobutyl carbinol 1.6%, dimethylbenzene 1.5%.
Embodiment two
As shown in Fig. 2 the concrete flotation process of the present invention is as follows
S1, by granularity, coal 1 (raw material) feeds agitator A by feed pump (being not drawn in figure) in the particulate of below 3mm
Sized mixing, ore pulp 2 after coal is sized mixing in output particulate.
S2, coal in particulate is sized mixing after ore pulp 2 feed spiral B and carry out spiral and throw tail operation, the high ash spoil of output
Granule is used as sorting tail coal 3, while output and retaining the coarse-fine coal 4 of sorting；Sorting tail coal 3 is used as gangue treatment.
S3, the coarse-fine coal 4 of sorting is fed vibration sieve bend C and carries out graded operation, the slot size of vibration sieve bend is
0.7mm, about between 0.25-1mm, oversize is the coarse-fine coal 5 of coarse grain to partition size, and siftage is the coarse-fine coal 7 of particulate.
S41, the coarse-fine coal 5 of coarse grain is fed short body rod mill D carry out coal-grinding dissociation, product 6 after output mill, by controlling mill
The coal time so that product 6 is in below 0.5mm after mill but is unlikely to overground phenomenon.Product meets density level simultaneously after mill
When being less than 70% less than 10%, ash less than 1.6kg/L, yield, flow process S3 is back to, product after mill is entered using classifying equipoment
Row graded operation, and it is sequentially completed flow process S41, S42, S5, S6；Otherwise, flow process S2 is back to, using separation of coarse slime equipment pair
Product carries out Throwing tail operations after mill, and is sequentially completed flow process S3, S41, S42, S5, S6.
S42, the coarse-fine coal 7 of particulate and floating agent 8 are fed into action of forced stirring device E carry out operation of sizing mixing, output particulate is thick
Cleaned coal size mixing after ore pulp 9.
S5, the coarse-fine coal of particulate is sized mixing after ore pulp 9 feed flotation device F and carry out roughly selecting operation first, pan feeding pulp density is
80g/L, Jing flotation device F roughly selects output ash roughly selecting cleaned coal 10 and roughly select tail coal for 14-15%.
S6, cleaned coal 10 will be roughly selected feed flotation column G and carry out selected operation, output cleaned coal 11 and selected tail coal, cleaned coal 11 will be most
Whole ash is 12.5% or so, and selected tail coal mixes output tail coal 12 with tail coal is roughly selected.
Floating agent use quality percentage ratio：N-butyl alcohol 31%, kerosene 65%, alkylphenol polyoxyethylene 1.3%, methyl
Isobutyl carbinol 1.1%, glycol polypropylene 1.6%.
Embodiment three
As shown in Fig. 2 the concrete flotation process of the present invention is as follows
S1, by granularity, coal 1 (raw material) feeds agitator A by feed pump (being not drawn in figure) in the particulate of below 3mm
Sized mixing, ore pulp 2 after coal is sized mixing in output particulate.
S2, coal in particulate is sized mixing after ore pulp 2 feed spiral B and carry out spiral and throw tail operation, the high ash spoil of output
Granule is used as sorting tail coal 3, while output and retaining the coarse-fine coal 4 of sorting；Sorting tail coal 3 is used as gangue treatment.
S3, the coarse-fine coal 4 of sorting is fed vibration sieve bend C and carries out graded operation, the slot size of vibration sieve bend is
1mm, about between 0.25-1mm, oversize is the coarse-fine coal 5 of coarse grain to partition size, and siftage is the coarse-fine coal 7 of particulate.
S41, the coarse-fine coal 5 of coarse grain is fed short body rod mill D carry out coal-grinding dissociation, product 6 after output mill, by controlling mill
The coal time so that product 6 is in below 0.5mm after mill but is unlikely to overground phenomenon.Product meets density level simultaneously after mill
When being less than 70% less than 10%, ash less than 1.6kg/L, yield, flow process S3 is back to, product after mill is entered using classifying equipoment
Row graded operation, and it is sequentially completed flow process S41, S42, S5, S6；Otherwise, flow process S2 is back to, using separation of coarse slime equipment pair
Product carries out Throwing tail operations after mill, and is sequentially completed flow process S3, S41, S42, S5, S6.
S42, the coarse-fine coal 7 of particulate and floating agent 8 are fed into action of forced stirring device E carry out operation of sizing mixing, output particulate is thick
Cleaned coal size mixing after ore pulp 9.
S5, the coarse-fine coal of particulate is sized mixing after ore pulp 9 feed flotation device F and carry out roughly selecting operation first, pan feeding pulp density is
80g/L, Jing flotation device F roughly selects output ash roughly selecting cleaned coal 10 and roughly select tail coal for 14-15%.
S6, cleaned coal 10 will be roughly selected feed flotation column G and carry out selected operation, output cleaned coal 11 and selected tail coal, cleaned coal 11 will be most
Whole ash is 12.5% or so, and selected tail coal mixes output tail coal 12 with tail coal is roughly selected.
Floating agent use quality percentage ratio：α-terpinol 34%, Paraffin liquid heavy 61%, alkylphenol polyoxyethylene
1.4%th, sodium silicate 1.9%, glycol polypropylene 1.7%.
In sum, a kind of floatation process of coal in particulate is embodiments provided, during this selects again work to be based on for skill
Coal crushes the floatation process of coal in a kind of flotation of dissociation, realizes the efficient recovery to rare coking coal resource；The flotation work
Skill flow process is simple, technology maturation, small investment, operating cost are low, remarkable in economical benefits.Additionally, spiral separating density compared with
High (generally in more than 1.6Kg/L), can throw in advance except a part of Jing crushes the high ash for dissociateing under its optimal separating density
Material, both ensure that tail coal ash, and while avoiding spoil enters grinding machine, significantly reduce the load of grinding machine, reduce energy
Consumption, alleviates the pollution to follow-up flotation operation after high ash material grinds；Short body grinding machine (autogenous tumbling mill or rod mill) is quick
Pan feeding, quick discharge, in both ensure that, low-ash material fully dissociated, generation is unlikely to again and is unfavorable for follow-up flotation
The overground phenomenon of operation；Bulk flotation medicament not only increases the amount of expansion of floatation process, also increases the life-span of foam；It is floating
The action of forced stirring device for being elected to be industry can be fully dispersed by medicament, improves pharmacy effect effect, and because high shear is to coal
The scrubbing action on grain surface, thin mud cover lid effect mitigates significantly；The recovery that operation ensure that low ash particle using flotation device is roughly selected,
Selected operation guarantees flotation selectivity using flotation column.
The above, the only present invention preferably specific embodiment, but protection scope of the present invention is not limited thereto,
Any those familiar with the art the invention discloses technical scope in, the change or replacement that can be readily occurred in,
All should be included within the scope of the present invention.
Claims (10)
1. in a kind of particulate coal floatation process, it is characterised in that the flow process of the technique is as follows：
S1, carry out operation of sizing mixing, ore pulp after coal is sized mixing in output particulate using coal size mixing equipment in particulate；
S2, coal in the particulate is sized mixing using separation of coarse slime equipment after ore pulp thrown tail operation in advance, output sorting is thick
Cleaned coal and sorting tail coal, sorting tail coal is used as gangue treatment；
S3, graded operation, the coarse-fine coal of output particulate and the coarse-fine coal of coarse grain are carried out to the coarse-fine coal of the sorting using classifying equipoment；
S41, dissociation operation is carried out to the coarse-fine coal of the coarse grain using coal-grinding equipment, product and recycled after output mill；
S42, the coarse-fine coal of the particulate is mixed with floating agent, operation of sizing mixing is carried out to mixture using size mixing equipment,
The coarse-fine coal of output particulate size mixing after ore pulp；
S5, the coarse-fine coal of the particulate is sized mixing using roughing separation equipment after ore pulp carry out roughly selecting operation, output is roughly selected cleaned coal and is roughly selected
Tail coal；
S6, selected operation, output cleaned coal and selected tail coal are carried out to the cleaned coal of roughly selecting using picking equipment；
The raw material of the floating agent and by total weight percent proportioning be following one of which：
N-octyl alcohol 23%-33%, kerosene 62%-72%, alkylphenol polyoxyethylene 1%-2%, methyl isobutyl carbinol 1%-
2%th, dimethylbenzene 1%-2%；
N-butyl alcohol 27%-37%, kerosene 58%-68%, alkylphenol polyoxyethylene 1%-2%, methyl isobutyl carbinol 1%-
2%th, glycol polypropylene 1%-2%；
α-terpinol 30%-40%, Paraffin liquid heavy 55%-65%, alkylphenol polyoxyethylene 1%-2%, sodium silicate
1%-2%, glycol polypropylene 1%-2%.
2. in particulate according to claim 1 coal floatation process, it is characterised in that the coal-grinding equipment be short body rod milling
Machine or short body autogenous tumbling mill.
3. in particulate according to claim 2 coal floatation process, it is characterised in that to after the mill product recovery profit
It is as follows with mode：
After the mill product meet simultaneously density level less than 1.6kg/L, yield less than 10%, ash be less than 70% when, be back to
Flow process S3, using classifying equipoment graded operation is carried out to product after mill, and is sequentially completed flow process S41, S42, S5, S6；It is no
Then, flow process S2 is back to, Throwing tail operations is carried out to product after mill using separation of coarse slime equipment, and be sequentially completed flow process
S3、S41、S42、S5、S6。
4. in particulate according to claim 1 coal floatation process, it is characterised in that by the tail coal of roughly selecting with selected tail
Coal mixes, output tail coal.
5. in particulate according to claim 1 coal floatation process, it is characterised in that coal size mixing equipment is in the particulate
Agitator；The agitator uses BGT series surface modification pulp mixing machines；
The separation of coarse slime equipment is spiral；The spiral uses high weir spiral classifier or sinking
Spiral classifier；
The size mixing equipment is action of forced stirring device；
The roughing separation equipment is flotation device；
The picking equipment is flotation column；
The classifying equipoment is vibration sieve bend.
6. in particulate according to claim 5 coal floatation process, it is characterised in that the sieve aperture of the vibration sieve bend is big
It is little for 0.5-1mm, to ensure siftage granularity in the range of suitable flotation.
7. in particulate according to claim 1 coal floatation process, it is characterised in that the raw material of the floating agent and press
Total weight percent proportioning is：N-octyl alcohol 26%, kerosene 70%, alkylphenol polyoxyethylene 1.2%, methyl isobutyl carbinol
1.3%th, dimethylbenzene 1.5%.
8. in particulate according to claim 1 coal floatation process, it is characterised in that the raw material of the floating agent and press
Total weight percent proportioning is：N-butyl alcohol 31%, kerosene 65%, alkylphenol polyoxyethylene 1.6%, methyl isobutyl carbinol
1.1%th, glycol polypropylene 1.3%.
9. in particulate according to claim 1 coal floatation process, it is characterised in that the raw material of the floating agent and press
Total weight percent proportioning is：α-terpinol 36%, Paraffin liquid heavy 59%, alkylphenol polyoxyethylene 1.8%, sodium silicate
1.7%th, glycol polypropylene 1.5%.
10. in the particulate according to claim 1-9 coal floatation process, it is characterised in that the Paraffin liquid heavy is
Industrial products, main component is that carbon atom number is more than or equal to 12 and n-alkane and aromatic hydrocarbon less than or equal to 18 in molecule.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610446935.1A CN106669957B (en) | 2016-06-20 | 2016-06-20 | The floatation process of coal in a kind of particulate |
Applications Claiming Priority (1)
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| CN109731695A (en) * | 2019-03-22 | 2019-05-10 | 山东超美清洁能源有限公司 | A kind of sorting agent of energy conservation and environmental protection, clean and effective |
| CN109746115A (en) * | 2019-02-01 | 2019-05-14 | 中国矿业大学 | It is a kind of coke rich coal middle coal intergrowth multistage dissociation-column joint select technique again |
| CN110947524A (en) * | 2019-12-11 | 2020-04-03 | 乌海市广纳洗煤有限公司 | Coal washing and sorting method |
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