CN109701731A - A kind of cleaned coal flotation clean utilization treatment process - Google Patents
A kind of cleaned coal flotation clean utilization treatment process Download PDFInfo
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- CN109701731A CN109701731A CN201910033103.0A CN201910033103A CN109701731A CN 109701731 A CN109701731 A CN 109701731A CN 201910033103 A CN201910033103 A CN 201910033103A CN 109701731 A CN109701731 A CN 109701731A
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- flotation
- cleaned coal
- treatment process
- clean utilization
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Abstract
The present invention relates to a kind of cleaned coal flotation clean utilization treatment process, and the technical scheme comprises the following steps: step A: the solution containing smaller particle cleaned coal enters floatation equipment, select flotation concentrate by floatation equipment；Step B: the flotation concentrate in step A enters dehydration equipment and is carried out dehydrating.It is an advantage of the invention that can be further ensured that cleaned coal can obtain more efficiently adequately utilizing.
Description
Technical field
The present invention relates to a kind of cleaned coal treatment process, more particularly, to a kind of cleaned coal flotation clean utilization treatment process.
Background technique
Cleaned coal flotation is an indispensable process of coal deep processing, from mine directly mined coal
Raw coal, raw coal has been mixed into many impurity in recovery process, and the quality of coal is also different, and fixed ash is small and fixed ash
Big coal is mixed in together.The production of cleaned coal is exactly to reject the impurity in raw coal, or fat coal and colm are carried out a point door
A kind of method of other class.
Existing cleaned coal floatation process can refer to the patent of invention application No. is 201310583692.2, mainly pass through three
Product dense medium cyclone separates cleaned coal, middle coal and spoil, is dehydrated later, de-mediated forms product.
Dual medium cyclone dressing is completed using Archimedes principle in centrifugal force field, after material enters cyclone,
Under centrifugal force effect, the particle of different densities radially scatter, and weight particle is moved respectively to the density of oneself similar density
Entering upper up-flow on face, perhaps sinking is discharged from underflow opening or overflow port.70%- can be sub-elected by dense medium cyclone
80% cleaned coal, the substantially biggish block cleaned coal of granularity isolated, but some granularity is less than or equal to the cleaned coal of 0.4mm
It can not be recycled, there is also cleaned coal in the liquid discharged outward.
Summary of the invention
In view of the deficienciess of the prior art, the object of the present invention is to provide a kind of cleaned coal flotation clean utilizations to handle work
Skill, its advantage is that can be further ensured that cleaned coal can obtain more efficiently adequately utilizing.
Above-mentioned purpose of the invention has the technical scheme that a kind of cleaned coal flotation clean utilization processing
Technique, comprising the following steps:
Step A: the solution containing smaller particle cleaned coal enters floatation equipment, selects flotation concentrate by floatation equipment；
Step B: the flotation concentrate in step A enters dehydration equipment and is carried out dehydrating.
Granularity can be extracted by carrying out flotation to the cleaned coal containing smaller particle by using above-mentioned technical proposal
Cleaned coal less than or equal to 0.4mm makes cleaned coal obtain more efficiently adequately utilizing.
The present invention is further arranged to: having the solution of smaller particle cleaned coal to be introduced into waterpower rotation before entering floatation equipment
Flow device, the overflow of water conservancy cyclone enters floatation equipment, and the underflow of hydrocyclone enters sieve bend, the backwater of sieve bend into
Enter floatation equipment.
The biggish cleaned coal of granularity in floatation equipment can be reduced by using above-mentioned technical proposal, after screening by sieve bend
Deposition so that flotation more sufficiently, efficiently.
The present invention is further arranged to: the floatation equipment includes floatation feed bucket, kaskad apparatus for pre-flotation pulp conditioning and flotation device, arc
The backwater of shape sieve is introduced into floatation feed bucket, then enters back into kaskad apparatus for pre-flotation pulp conditioning, at the same time, is added in kaskad apparatus for pre-flotation pulp conditioning
Foaming agent and collecting agent are sufficiently mixed the liquid for entering kaskad apparatus for pre-flotation pulp conditioning with foaming agent and collecting agent, enter together later
Flotation device carries out flotation.
By using above-mentioned technical proposal, by making the ore pulp come out from floatation feed bucket and blistering in kaskad apparatus for pre-flotation pulp conditioning
Agent, collecting agent mixing, can be improved the hydrophobicity of ore particle, improve the utilization rate and output capacity of cleaned coal, make to emerge and more fill
Point.
The present invention is further arranged to: first adding foaming agent before adding foaming agent and collecting agent into kaskad apparatus for pre-flotation pulp conditioning
It is added in bubble pail, collecting agent is added in collecting bucket, then bubble pail and collecting bucket are communicated in a deposit bucket simultaneously,
It is then added to mine from medicament is stirred evenly in deposit bucket and makes an accurate selection of in standby device.
First medicament is stirred before ore pulp mixing is mixed with foaming agent and collecting agent by using above-mentioned technical proposal
Uniformly, can make to mix between subsequent ore pulp and medicament more abundant.
The present invention is further arranged to: metering pump is provided between the bubble pail and deposit bucket, for controlling foaming agent
Dosage, collecting bucket and deposit bucket between be again provided with metering pump, for controlling the dosage of collecting agent.
By using above-mentioned technical proposal, the dosage of medicament is controlled by metering pump, flotation can be made more abundant.
The present invention is further arranged to: flotation device can be connected in turn multiple.
By using above-mentioned technical proposal, multiple flotation devices can carry out stage flotation to flotation concentrate, divide concentrate
It selects more abundant.
The present invention is further arranged to: the dehydration equipment uses pressing filter.
By using above-mentioned technical proposal, pressing filter can be carried out dehydrating the cleaned coal floatingly selected.
The present invention is further arranged to: the pressing filter include rack and it is several be slidably arranged in the rack it
Between filter plate, the hold-down mechanism for driving several filter plate mutual extrusions is additionally provided in the side of rack, on the rack side be provided with
The water spraying mechanism sprayed water to filter plate.
By using above-mentioned technical proposal, after being dehydrated to cleaned coal, since the mesh of filter plate is minimum, while after compression
Cleaned coal filter cake also there is certain humidity, therefore after filter plate is grouped and pulls open, part cleaned coal particle can be attached on strainer,
It cannot fall automatically, by the water spraying mechanism of setting, the cleaned coal being adhered on filter plate can be made to fall to spraying water on filter plate
It falls, improves the blanking efficiency of cleaned coal, while will not damage again to filter cloth.
The present invention is further arranged to: the water spraying mechanism includes being horizontally fixed on water pipe above rack, in water pipe
Multiple branch pipes that bottom end is connected to vertically and the casing being rotatably connected on branch pipe are vertically arranged with a shaft in the branch pipe,
The inner wall of itself and branch pipe is rotatablely connected, and the bottom of shaft and the bottom end inner wall of described sleeve pipe are affixed, set in shaft along its circumferential direction
It is equipped with rotating vane, is communicated with multiple spray heads in the bottom of casing, when water enters branch pipe, water flow plays the band on rotating vane
Dynamic rotating vane and shaft rotation, so that casing be driven to rotate.
By using above-mentioned technical proposal, water flow enters in branch pipe from water pipe, and beats on rotating vane, due to water flow
Certain impact force is generated to rotating vane, therefore, rotating vane can rotate while shaft also rotates, and the rotation of shaft can
Casing rotation is driven, while the water in branch pipe is sprayed from spray head along sleeve, in such manner, it is possible to make spray head while water spray
Rotation, so that water spray effect is more preferable.
The present invention is further arranged to: the hold-down mechanism includes the hydraulic cylinder that rack side is arranged in, the work of hydraulic cylinder
Stopper rod is connected with a push plate, and the push plate is right against the filter plate setting.
By using above-mentioned technical proposal, starts hydraulic cylinder, can make push plate that multiple filter plates press together, realization pair
The dehydration of cleaned coal.
In conclusion advantageous effects of the invention are as follows:
1. the technique can flotate the cleaned coal that granularity is less than or equal to 0.4mm, the utilization rate and output capacity of cleaned coal are improved；
2. can be cleared up the cleaned coal filter cake bonded on filter plate, while again will not be to filter plate by the water spraying mechanism of setting
It damages.
Detailed description of the invention
Fig. 1 is integrated artistic schematic diagram of the invention；
Fig. 2 is the schematic diagram that the present invention embodies pressing filter；
Fig. 3 is the cross-sectional view that the present invention embodies water spraying mechanism.
In figure, 1, hydrocyclone；2, sieve bend；3, floatation equipment；31, floatation feed bucket；311, collecting bucket；312, it rises
Steep bucket；313, bucket is laid in；314, metering pump；32, kaskad apparatus for pre-flotation pulp conditioning；33, flotation device；4, pressing filter；41, rack；42, it filters
Plate；421, support frame；43, hold-down mechanism；431, hydraulic cylinder；4311, piston rod；432, push plate；5, water spraying mechanism；51, water pipe；
52, branch pipe；521, bearing；522, support rod；53, casing；531, spray head；54, shaft；541, rotating vane.
Specific embodiment
Below in conjunction with attached drawing, invention is further described in detail.
As shown in Figure 1, being a kind of cleaned coal flotation clean utilization treatment process disclosed by the invention, comprising the following steps:
Step A: the solution containing smaller particle cleaned coal enters hydrocyclone 1, and the overflow of water conservancy cyclone enters floatation equipment
3, the underflow of hydrocyclone 1 enters sieve bend 2, and the backwater of sieve bend 2 enters floatation equipment 3, is selected by floatation equipment 3
Flotation concentrate.
Floatation equipment 3 includes floatation feed bucket 31, kaskad apparatus for pre-flotation pulp conditioning 32 and flotation device 33, and the backwater of sieve bend 2 is first
Into floatation feed bucket 31.Collecting agent and foaming agent are added in kaskad apparatus for pre-flotation pulp conditioning 32, then makes backwater from floatation feed bucket
It enters in 31 in kaskad apparatus for pre-flotation pulp conditioning 32 and is sufficiently mixed with collecting agent and foaming agent, then enter flotation device 33 together and carry out
Flotation, flotation device 33 can be connected in turn multiple.
It is more abundant in order to enable backwater to mix with collecting agent and foaming agent, before mixing, first by collecting agent
It is poured into collecting bucket 311, foaming agent is poured into bubble pail 312, then collecting bucket 311 is connected to jointly with bubble pail 312
Have and be provided with metering pump 314 between deposit bucket 313, collecting bucket 311 and bubble pail 312 and deposit bucket 313, is caught for controlling
The dosage for receiving agent and foaming agent is first mixed after collecting agent and foaming agent are added to deposit bucket 313, mixes medicament
Uniformly, then the medicament laid in bucket 313 kaskad apparatus for pre-flotation pulp conditioning 32 is poured into mix with ore pulp.
Step B: enter dehydration equipment from the flotation concentrate that flotation device 33 floatingly selects in step A and be carried out dehydrating.Dehydration
Equipment can use pressing filter 4.
As shown in Fig. 2, pressing filter 4 includes the rack 41 stood on ground, several filter plates 42 are provided in rack 41,
The two sides of every piece of filter plate 42 are connected with support frame 421 triangular in shape, for being overlapped in rack 41 to carry out to filter plate 42
Support, while enabling filter plate 42 along the horizontal sliding of rack 41.
The hold-down mechanism 43 for driving several 42 mutual extrusions of filter plate is additionally provided in the side of rack 41, hold-down mechanism 43 wraps
The hydraulic cylinder 431 that 41 side of rack is set is included, the piston rod 4311 of hydraulic cylinder 431 is connected with a push plate 432, and push plate 432 is just
Filter plate 42 is arranged.
When extracting cleaned coal, Fig. 1 will be seen from flotation device 33() it flotates the filtrate with cleaned coal and is passed through pressing filter 4
It is interior, then pass through the pressing of hold-down mechanism 43, the moisture in filtrate is discharged by drainage pipeline, cleaned coal filter cake stays in filter plate 42
In filter chamber, then filter plate 42 is pulled open by automatic pulling plate device (being not drawn into figure), cleaned coal filter cake is made to carry out blanking.
Since the mesh of filter plate 42 is minimum, while compressed cleaned coal filter cake also has certain humidity, therefore works as filter plate
After 42 are grouped and pull open, part cleaned coal particle can be attached on strainer, cannot be fallen automatically.Therefore, it is arranged above rack 41
There is the water spraying mechanism 5 sprayed water to filter plate 42.
As shown in Figures 2 and 3, water spraying mechanism 5 includes being horizontally fixed on the water pipe 51 of 41 top of rack and in water pipe 51
Multiple branch pipes 52 for being connected to vertically of bottom end, multiple branch pipes 52 are arranged along the axial uniform intervals of water pipe 51.In each branch pipe
Casing 53 is rotatably connected to by bearing 521 on 52, is connected between branch pipe 52 and casing 53, it is vertical in the bottom of casing 53
It is communicated with multiple spray heads 531.
A pair of support rods 522, the company of rotation between two support rods 522 are fixed with along its axisymmetrical on the inner wall of branch pipe 52
It is connected to shaft 54, shaft 54 is vertically arranged, and the bottom of shaft 54 stretches out branch pipe 52 and the bottom end inner wall of casing 53 is affixed, in shaft
Its circumferential direction is provided with rotating vane 541 on 54.
Water flow enters in branch pipe 52 from water pipe 51, and beats on rotating vane 541, since water flow is to rotating vane 541
Certain impact force is generated, therefore, rotating vane 541 can rotate while shaft 54 being driven also to rotate, the rotation energy of shaft 54
Enough casing 53 is driven to rotate, while the water in branch pipe 52 is sprayed from spray head 531 along sleeve, in such manner, it is possible to make spray head 531
It is rotated while water spray, so that water spray effect is more preferable.By spraying water, the cleaned coal being adhered on filter plate can be made to fall,
The blanking efficiency of cleaned coal is improved, while filter cloth will not be damaged again.
The embodiment of present embodiment is presently preferred embodiments of the present invention, not limits protection of the invention according to this
Range, therefore: the equivalence changes that all structures under this invention, shape, principle are done, should all be covered by protection scope of the present invention it
It is interior.
Claims (10)
1. a kind of cleaned coal flotation clean utilization treatment process, it is characterized in that: the following steps are included:
Step A: the solution containing smaller particle cleaned coal enters floatation equipment (3), selects flotation concentrate by floatation equipment (3)；
Step B: the flotation concentrate in step A enters dehydration equipment and is carried out dehydrating.
2. a kind of cleaned coal flotation clean utilization treatment process according to claim 1, it is characterized in that: there is smaller particle cleaned coal
Solution enter floatation equipment (3) before be introduced into hydrocyclone (1), the overflow of water conservancy cyclone enters floatation equipment
(3), the underflow of hydrocyclone (1) enters sieve bend (2), and the backwater of sieve bend (2) enters floatation equipment (3).
3. a kind of cleaned coal flotation clean utilization treatment process according to claim 1, it is characterized in that: the floatation equipment
It (3) include floatation feed bucket (31), kaskad apparatus for pre-flotation pulp conditioning (32) and flotation device (33), the backwater of sieve bend (2) is introduced into floating
Be selected into charging basket (31), then enter back into kaskad apparatus for pre-flotation pulp conditioning (32), at the same time, be added in the kaskad apparatus for pre-flotation pulp conditioning (32) foaming agent and
Collecting agent is sufficiently mixed the liquid for entering kaskad apparatus for pre-flotation pulp conditioning (32) with foaming agent and collecting agent, enters flotation together later
Machine (33) carries out flotation.
4. a kind of cleaned coal flotation clean utilization treatment process according to claim 3, it is characterized in that: to kaskad apparatus for pre-flotation pulp conditioning
(32) first foaming agent is added in bubble pail (312) before addition foaming agent and collecting agent in, collecting agent is added to collecting
In bucket (311), then bubble pail (312) and collecting bucket (311) are communicated in a deposit bucket (313) simultaneously, from deposit bucket
(313) medicament stirred evenly in and is then added to mine and makes an accurate selection of in standby device.
5. a kind of cleaned coal flotation clean utilization treatment process according to claim 4, it is characterized in that: the bubble pail
(312) metering pump (314) are provided between deposit bucket (313), for controlling the dosage of foaming agent, in collecting bucket (311) and
Metering pump (314) are again provided between deposit bucket (313), for controlling the dosage of collecting agent.
6. a kind of cleaned coal flotation clean utilization treatment process according to claim 3, it is characterized in that: flotation device (33) can be with
It is connected in turn multiple.
7. a kind of cleaned coal flotation clean utilization treatment process according to claim 1, it is characterized in that: the dehydration equipment is adopted
With pressing filter (4).
8. a kind of cleaned coal flotation clean utilization treatment process according to claim 7, it is characterized in that: the pressing filter
It (4) include rack (41) and several filter plates (42) being slidably arranged between the rack (41), in the side of rack (41)
It is additionally provided with the hold-down mechanism (43) for driving several filter plate (42) mutual extrusions, is provided with above rack (41) to filter plate (42)
The water spraying mechanism (5) sprayed water.
9. a kind of cleaned coal flotation clean utilization treatment process according to claim 8, it is characterized in that: the water spraying mechanism
It (5) include the multiple branch pipes for being horizontally fixed on water pipe (51) above rack (41), being connected to vertically in the bottom end of water pipe (51)
(52) and it is rotatably connected on casing (53) on branch pipe (52), is vertically arranged with a shaft (54) in the branch pipe (52), with
The inner wall of branch pipe (52) is rotatablely connected, and the bottom of shaft (54) and the bottom end inner wall of described sleeve pipe (53) are affixed, in shaft (54)
On its circumferential direction is provided with rotating vane (541), multiple spray heads (531) are communicated in the bottom of casing (53), when water enters
When branch pipe (52), water flow is beaten drives rotating vane (541) and shaft (54) rotation on rotating vane (541), to drive
Casing (53) rotation.
10. a kind of cleaned coal flotation clean utilization treatment process according to claim 8, it is characterized in that: the hold-down mechanism
It (43) include hydraulic cylinder (431) of the setting in rack (41) side, the piston rod (4311) of hydraulic cylinder (431) is connected with a push plate
(432), the push plate (432) is right against the filter plate (42) setting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910033103.0A CN109701731A (en) | 2019-01-14 | 2019-01-14 | A kind of cleaned coal flotation clean utilization treatment process |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910033103.0A CN109701731A (en) | 2019-01-14 | 2019-01-14 | A kind of cleaned coal flotation clean utilization treatment process |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111375483A (en) * | 2020-03-19 | 2020-07-07 | 中国矿业大学 | Separation system and separation process for coal slime recovery |
| CN114768990A (en) * | 2022-04-20 | 2022-07-22 | 曹妙珂 | Mineral flotation system that flotation efficiency is high |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4529506A (en) * | 1983-08-08 | 1985-07-16 | Amax Inc. | Method for cleaning fine coal |
| CN101502818A (en) * | 2009-03-05 | 2009-08-12 | 煤炭科学研究总院唐山研究院 | Integrated device for hydraulic classification and sorting of coarse slime as well as classification and sorting system |
| CN102284354A (en) * | 2011-09-13 | 2011-12-21 | 永城煤电控股集团有限公司 | Coarse slime separating process |
| CN104138808A (en) * | 2014-08-19 | 2014-11-12 | 四川达竹煤电(集团)有限责任公司渡市选煤发电厂 | Three-product flotation coal preparation technique |
| CN207606964U (en) * | 2017-12-05 | 2018-07-13 | 四川四正建设工程质量检测有限公司 | Concrete curing rotation nozzle apparatus |
| CN108479138A (en) * | 2018-06-20 | 2018-09-04 | 浙江鸿博环保设备有限公司 | A kind of vibrating mechanism of filter press |
-
2019
- 2019-01-14 CN CN201910033103.0A patent/CN109701731A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4529506A (en) * | 1983-08-08 | 1985-07-16 | Amax Inc. | Method for cleaning fine coal |
| CN101502818A (en) * | 2009-03-05 | 2009-08-12 | 煤炭科学研究总院唐山研究院 | Integrated device for hydraulic classification and sorting of coarse slime as well as classification and sorting system |
| CN102284354A (en) * | 2011-09-13 | 2011-12-21 | 永城煤电控股集团有限公司 | Coarse slime separating process |
| CN104138808A (en) * | 2014-08-19 | 2014-11-12 | 四川达竹煤电(集团)有限责任公司渡市选煤发电厂 | Three-product flotation coal preparation technique |
| CN207606964U (en) * | 2017-12-05 | 2018-07-13 | 四川四正建设工程质量检测有限公司 | Concrete curing rotation nozzle apparatus |
| CN108479138A (en) * | 2018-06-20 | 2018-09-04 | 浙江鸿博环保设备有限公司 | A kind of vibrating mechanism of filter press |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111375483A (en) * | 2020-03-19 | 2020-07-07 | 中国矿业大学 | Separation system and separation process for coal slime recovery |
| CN114768990A (en) * | 2022-04-20 | 2022-07-22 | 曹妙珂 | Mineral flotation system that flotation efficiency is high |
| CN114768990B (en) * | 2022-04-20 | 2023-12-15 | 内蒙古广汇选煤有限责任公司 | Mineral flotation system with high flotation efficiency |
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Application publication date: 20190503 |
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