CN109365141A - A kind of coal slime floating process that floating agent recycles - Google Patents
A kind of coal slime floating process that floating agent recycles Download PDFInfo
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- CN109365141A CN109365141A CN201811431154.0A CN201811431154A CN109365141A CN 109365141 A CN109365141 A CN 109365141A CN 201811431154 A CN201811431154 A CN 201811431154A CN 109365141 A CN109365141 A CN 109365141A
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- floating
- coal
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- coal slime
- floatation
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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
- B03D1/02—Froth-flotation processes
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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
- B03D1/12—Agent recovery
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Abstract
The present invention provides a kind of coal slime floating process that floating agent recycles, the coal slime floating process being mainly made of the part such as coal slime flotation equipment, filter press, air-floating apparatus, floating agent bucket.Mainly comprise the steps that floatation clean coal enters floatation clean coal bucket through collecting chute；Floatation clean coal becomes final head coal product through the dewatered material of filter press, and filtrate enters air-floating apparatus；Air-floating apparatus upper foam feeds floatation feed size mixing device after transporting；Air-floating apparatus residue filtrate enters circulating water pool.The method have the characteristics that the floating agent being distributed in floatation clean coal filtrate is enriched with using micro air bubble, is recycled, floatation system is back to recycle, it is simple for process, it is adaptable, coal slime flotation process reagent consumption can effectively reduce using this technique, 10% or more floating agent consumption can be saved, the residual fine coal slime content reduced in recirculated water is also helped, promotes recycled-water quality.
Description
Technical field
The invention belongs to flotation Concentrating Fields, are related to flotation coal separation process medicament utilization process, in particular to a kind of
A kind of coal slime floating process based on floating agent recycling.
Background technique
Flotation is that the most effective, most economical of -0.5mm coal slime is also most mature method, and future is with comprehensive mechanized coal mining degree
Promotion and coal quality variation, the yield of fine coal slurry will promote further, and the importance of flotation also will be highlighted further.
Floating agent is to promote flammable body floatability, adjusts the key factor of bubble stability.But the consumption of floating agent
On the one hand it has been obviously improved flotation operation cost, flotation cost is 3 times of reselection operation or more at present, wherein mainly medicament disappears
The reason of consumption.On the other hand certain pollution is also generated to coal preparation plant's water body, therefore is reduced floating agent consumption and not only improved increasing
Its bring water pollution can be alleviated by adding Business Economic Benefit also.
The research that existing coal slime flotation reduces medicine consumption is concentrated mainly on flotation leading portion, i.e., mainly by stage agent addition, force,
New and effective medicament is sized mixing and developed in reinforcing reduces floating agent consumption.However after flotation back segment floatingly selects cleaned coal, tailing
It remains a large amount of collecting agents being dissolved in water body, foaming agent and is utilized without centralized recovery.Although coal preparation plant's water body is in dynamic
In the systemic circulation of state, but and not up to special water it is dedicated.
In actual production, floatation clean coal filters pressing filtrate is returned to floatation feed link, indirect utilization filtrate by some coal preparation plants
In remaining floating agent be easy to cause the reduction of floatation feed concentration, deteriorate flotation effect but since filtrate water flow is larger.
In conclusion remaining floating agent in filtrate after the completion of recycling flotation, can further decrease flotation medicine
Agent consumption, but need to preferentially realize the enrichment of residual floating agent, in order to avoid detrimental effect is brought to flotation link.
Summary of the invention
Aiming at the problem that floating agent remained in water body after the completion of flotation is difficult to directly utilize.The present invention proposes to utilize
Filtrate after floatation clean coal filters pressing is carried out air bearing enrichment by the surface-active of floating agent, and the treatment process of recycling mentions
A kind of coal slime floating process that floating agent recycles is supplied.
To achieve the above object, the present invention adopts the following technical scheme:
A kind of coal slime floating process that floating agent recycles, includes the following steps:
Step 1: floating agent being added into floatation feed, feeds flotation device after mixing；
Step 2: floatation clean coal is dehydrated through filter press, and dewatered solid mixes final cleaned coal, and filtrate enters air-floating apparatus；
Step 3: air-floating apparatus isolates recirculated water and upper layer floating agent foam, and medicament foam is returned as floating agent
Floatation feed link is returned, recirculated water enters circulating water pool.
Preferably, the air-floating apparatus is pressurized dissolved air flotation equipment, generates 20~100 μm of micro air bubbles.
Preferably, filter press filtrate is in air-floating apparatus effective stay time in 5min or more.
Preferably, the air-floating apparatus aeration quantity is greater than 0.5m3/min·m2。
Preferably, the medicament foam of air-floating apparatus returns to floatation feed link, and reentry point can be adjusted flexibly according to technique, can
For size mixing device, floatation feed bucket/pond, floatation feed pipeline.
Preferably, for floatation clean coal after filter press is dehydrated, filtrate gravity flow enters air-floating apparatus.
The utility model has the advantages that coal slime flotation process is remained in the floating agent in floatation clean coal filtrate by the present invention carries out air bearing richness
Collection, recycling reduce the reagent consumption of floatation process；The residual fine coal slime content reduced in recirculated water is also helped,
Promote recycled-water quality；And recovery process is flexible, adaptable, no special operation is easy to agree with implementation with prior art.
Detailed description of the invention
Fig. 1 is the method for the invention flow diagram；
Figure label: A- flotation device；B- floatation clean coal bucket；C- clean coal pressur filter；D- filtrate tank；E- air-floating apparatus；K- is floating
Select medicament barrel；L- size mixing equipment；M- circulating water pool.
Attached drawing 2 is the technique for applying process of certain Oversized Coking Coal Cleaning Plant；
Attached drawing 3 is technique for applying process of this technique in certain Oversized Coking Coal Cleaning Plant.
Specific embodiment
In order to be readily appreciated that the technology of the present invention method, specific example is used now in conjunction with attached drawing, to technical side of the invention
Case is described.It is to be noted that embodiment described herein is only section Example of the invention, and non-present invention is complete
Portion's implementation acts on and is only to provide the mode for understanding that the content of present invention is more simple and clear for auditor and the public, and
It is not the limitation to technical solution of the present invention.Without departing from the inventive concept of the premise, all ordinary skills
Personnel do not make creative work with regard to thinkable other embodiment and the simple replacement of other pairs of technical solution of the present invention
And various change, belong to protection scope of the present invention.
As shown in Figure 1, the invention mainly comprises the following steps:
Floatation feed is added fresh floating agent (K- floating agent bucket) and feeds flotation device A after size mixing equipment L mixing；
Flotation device A sub-elects tail coal and cleaned coal, and floatation clean coal is collected through chute enters floatation clean coal bucket B；
Floatation clean coal ore pulp enters clean coal pressur filter C, and solids mixes final head coal product, and filtrate water enters filtrate tank D；
Filtrate water enters air-floating apparatus E, isolates recirculated water and upper layer floating agent foam, medicament foam through air bearing operation
Into size mixing equipment L, recirculated water enters circulating water pool M；
Attached drawing 2 is the technique for applying process of certain Oversized Coking Coal Cleaning Plant
The coal preparation plant is 3.0Mt/a Oversized Coking Coal Cleaning Plant, and raw material coal is 1/3 coking coal, and floatation feed ore pulp amount is about
600m3/ h, collecting agent diesel oil additional amount is 900g/t raw coal in normal floatation process, and foaming agent 2# oil dosage is 90g/t raw coal；
Floatation feed and floating agent feed 24 slot XJM-12 flotation after 2 XK-500 kaskad apparatuses for pre-flotation pulp conditioning are sized mixing
Machine；
Floatation clean coal feeds 2 KXGZ650/200-U type filter presses, the floatation clean coal after being dehydrated after entering floatation clean coal bucket
Mix final products；
Filter press filtrate returns to circulating water pool.
Attached drawing 3 is technique for applying process of this technique in certain Oversized Coking Coal Cleaning Plant
In scheme of the present invention, only increases 2 GSF-45 combined air flotation ponds newly and filtrate suspension is handled, Dan Chichi
Very little is 6000mm × 2700mm × 2100mm, treating capacity 34m3/ h, filtrate effective stay time are 6min, and aeration quantity is
0.6m3/min·m2；
Floatation clean coal filtrate floats up to air bearing after remaining floating agent therein and bubble from combined air flotation pond is flow to
Pool surface returns to 2 XK-500 kaskad apparatuses for pre-flotation pulp conditioning and sizes mixing, is recycled after collection；
Residue filtrate is back to circulating water pool in flotation tank.
After above-mentioned technique, it is 800g/t raw coal that coal preparation plant's reagent consumption actual measurement, which is collecting agent diesel oil additional amount, is risen
Infusion 2# oil dosage is 50g/t raw coal；Whole floating agent consumption reduces by 14% or more.Year saves about 420 tons of floating agent, year
Save about 2,100,000 yuan of production cost.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (6)
1. a kind of coal slime floating process that floating agent recycles, which comprises the steps of:
Step 1: floating agent being added into floatation feed, feeds flotation device after mixing；
Step 2: floatation clean coal is dehydrated through filter press, and dewatered solid mixes final cleaned coal, and filtrate enters air-floating apparatus；
Step 3: air-floating apparatus isolates recirculated water and upper layer floating agent foam, and medicament foam returns floating as floating agent
It is selected into material link, recirculated water enters circulating water pool.
2. the coal slime floating process that a kind of floating agent according to claim 1 recycles, which is characterized in that the gas
Floating device is pressurized dissolved air flotation equipment, generates 20~100 μm of micro air bubbles.
3. the coal slime floating process that a kind of floating agent according to claim 1 recycles, which is characterized in that filter press
Filtrate is in air-floating apparatus effective stay time in 5min or more.
4. the coal slime floating process that a kind of floating agent according to claim 1 recycles, which is characterized in that the gas
Floating device aeration quantity is greater than 0.5m3/min·m2。
5. the coal slime floating process that a kind of floating agent according to claim 1 recycles, which is characterized in that air bearing dress
The medicament foam set returns to floatation feed link, and it can be size mixing device, floatation feed that reentry point can be adjusted flexibly according to technique
Bucket/pond, floatation feed pipeline.
6. the coal slime floating process that a kind of floating agent according to claim 1 recycles, which is characterized in that flotation essence
For coal after filter press is dehydrated, filtrate gravity flow enters air-floating apparatus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811431154.0A CN109365141B (en) | 2018-11-28 | 2018-11-28 | Coal slime flotation process with recycling flotation agent |
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| CN201811431154.0A CN109365141B (en) | 2018-11-28 | 2018-11-28 | Coal slime flotation process with recycling flotation agent |
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| CN109365141A true CN109365141A (en) | 2019-02-22 |
| CN109365141B CN109365141B (en) | 2020-06-19 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112225431A (en) * | 2020-10-28 | 2021-01-15 | 昭仕（厦门）新材料有限公司 | Coal slime treatment method and coal slime treatment composite preparation |
| CN112371343A (en) * | 2020-09-21 | 2021-02-19 | 新汶矿业集团有限责任公司洗煤分公司 | Flotation clean coal dewatering and blending process |
| CN112536159A (en) * | 2020-11-20 | 2021-03-23 | 四川广旺能源发展（集团）有限责任公司唐家河煤矿 | Flotation tailing coal slime secondary concentration recovery process |
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| CN112536159A (en) * | 2020-11-20 | 2021-03-23 | 四川广旺能源发展（集团）有限责任公司唐家河煤矿 | Flotation tailing coal slime secondary concentration recovery process |
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