CN107008566B - A kind of steam coal separation technique - Google Patents
A kind of steam coal separation technique Download PDFInfo
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- CN107008566B CN107008566B CN201710320735.6A CN201710320735A CN107008566B CN 107008566 B CN107008566 B CN 107008566B CN 201710320735 A CN201710320735 A CN 201710320735A CN 107008566 B CN107008566 B CN 107008566B
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- screen
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- coal
- desliming
- layer
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- 239000003245 coal Substances 0.000 claims abstract description 70
- 239000000463 material Substances 0.000 claims abstract description 40
- 238000000034 method Methods 0.000 claims abstract description 21
- 238000000926 separation method Methods 0.000 claims abstract description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 9
- 230000001404 mediated effect Effects 0.000 claims abstract description 8
- 230000005484 gravity Effects 0.000 claims abstract description 7
- 239000002002 slurry Substances 0.000 claims abstract 2
- 230000018044 dehydration Effects 0.000 claims description 4
- 238000006297 dehydration reaction Methods 0.000 claims description 4
- 238000004513 sizing Methods 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 abstract description 11
- 230000008901 benefit Effects 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 239000000047 product Substances 0.000 description 19
- 239000002562 thickening agent Substances 0.000 description 10
- 238000012216 screening Methods 0.000 description 6
- 239000000706 filtrate Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- 239000010866 blackwater Substances 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 239000003250 coal slurry Substances 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
Classifications
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/28—Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens
Landscapes
- Solid Fuels And Fuel-Associated Substances (AREA)
Abstract
The invention discloses a kind of steam coal separation techniques, it include: raw coal by Double-layer elastic classifying screen progress dry method deep-graded, one layer of on-the-sieve material of Double-layer elastic classifying screen enters crusher, enter desliming screen after broken together with two layers of on-the-sieve material of Double-layer elastic classifying screen and carry out dry method desliming, the undersize material of Double-layer elastic classifying screen and the undersize material of desliming screen are as smalls product；The on-the-sieve material of desliming screen enters gravity concentrator and is sorted, and light, the heavy product after sorting respectively obtain cleaned coal, spoil product after de-mediated is dehydrated, and the dewatered undersize material of de-mediated enters slurry circulating system and handled, and realizes system closed water circuit.Present invention process is simple, produces stability and high efficiency, has the advantages that preparation proportion is high, material size range is wide, sharpness of separation is high, adaptable, production cost is low etc., realizes good economical and practical benefit.
Description
Technical field
The present invention relates to a kind of steam coal separation techniques, belong to coal screening and separation system and technology field.
Background technique
Coal is the main non-renewable energy in China, and rich reserves are Chinese energy safety and the energy up to 5.9 trillion tons
Most economical, most reliable, the most basic guarantee of strategy.National raw coal output is 37.5 hundred million tons within 2015, and consumption of coal accounts for energy
The 64.0% of source total quantity consumed, coal account for the principal status of public economy in China's energy consumption structure, and coal develops Chinese national economy
It is made that major contribution.Whole nation coal-cleaning utilization degree is lower at present, and raw coal preparation proportion is about 59%, the selected ratio of thermal coal
Example is only 35% or so, and World Developed Countries raw coal preparation proportion is 80%~100%.Due to clean processing producing level
It is low, bring Heavy environmental pollution, SO caused by fire coal285% and 70% are accounted for smoke discharge amount, and causes haze weather
One of principal element.
The high effect cleaning processing and utilization of coal resources be reduce sulfur dioxide, nitrogen oxides and smoke discharge amount economy,
Effective method is the premise of coal deep processing, is one of key technology of energy-saving and emission-reduction.Current driving force coal coal preparation plant mostly uses
Raw coal carries out 13 (6) classification, and+13mm lump coal sorts discharge refuse through vibro-assisted jigging or heavy-media separator, and smalls is not selected in, the technique
Smalls is not sorted, and raw coal preparation proportion is low, and clean coal yield is low, coal preparation plant's deficiency in economic performance；It is produced to meet user to coal
The requirement of quality needs to improve raw coal preparation proportion, increases the selected amount of smalls.But smalls is selected in entirely, what assorting room was brought into
Coal slime is needed through dehydration recycling, and coal slime dewatering effect is poor, and moisture of coal fines is high, calorific value is lower, some coal preparation plants even occur
The calorific value of sorted product coal is lower than the phenomenon that raw coal.Furthermore when the easy argillization of coal slime, excessive coal slime enters separation system, coal
Mud sedimentation is difficult, and moisture is difficult to remove, so that coal slurry content is excessively high in recirculated water, to influence separation operation, and then influences choosing
Coal works production-process systems operate normally.
Summary of the invention
Goal of the invention: in order to overcome the deficiencies in the prior art, the present invention provides a kind of steam coal separation technique, tool
Have that simple process, screening efficiency are high, sorting particle size range is wide, preparation proportion is high, sharpness of separation is high, adaptable, production cost
The features such as low.
Technical solution: to achieve the above object, the technical solution adopted by the present invention are as follows:
A kind of steam coal separation technique, comprising: raw coal carries out dry method deep-graded, the double-deck bullet by Double-layer elastic classifying screen
Property classifying screen one layer of on-the-sieve material enter crusher, enter together with two layers of on-the-sieve material of Double-layer elastic classifying screen after broken
Desliming screen carries out dry method desliming, and the undersize material of Double-layer elastic classifying screen and the undersize material of desliming screen are as smalls product；It is de-
The on-the-sieve material of mud sieve enters gravity concentrator and is sorted, and light, the heavy product after sorting respectively obtain cleaned coal, cash after de-mediated is dehydrated
Stone product, the dewatered undersize material of de-mediated enter black water (medium) processing system and are handled, and realize closing for system wash water
Road circulation.
Preferably, the double-deck raw coal sizing screen is divided into upper layer and lower layer, and uses flip flop screen, elastic bar screen, piano wire screen etc.
One of elastic screening plant.
Preferably, the desliming screen uses one of vibrating screen, flip flop screen.
Preferably, the gravity concentrator uses jigging machine or heavy-media separator, and selected material is divided into weight two by density
Kind product.
The utility model has the advantages that a kind of steam coal separation technique provided by the invention has the advantage that compared with the existing technology
Using the above scheme, carrying out screening to coal using elastic screening plant may be implemented the depth high efficiency screening of feed coal, can
To meet the particle size range of sorting pan feeding；Desliming operation is carried out to gravity concentrator pan feeding by desliming screen, to meet follow-up separation
The pan feeding requirement of operation, reduces the coal slurry content for entering separation system；It can be realized thermal coal dry deep-sizing and efficiently divide
Choosing, has widened the material size range of heavy-media separator, increases the preparation proportion of raw coal, improves quantity of cleaned coal；It alleviates
The argillization phenomenon of spoil, alleviates slime water system load, and present invention process is simple, produces stability and high efficiency, has preparation proportion
The high, advantages such as material size range is wide, sharpness of separation is high, adaptable, production cost is low, realize good economical and practical effect
Benefit.
Detailed description of the invention
Fig. 1 is a kind of process flow chart of steam coal separation technique of the present invention；
Fig. 2 is the process flow chart of the embodiment of the present invention 1；
Fig. 3 is the process flow chart of the embodiment of the present invention 2.
Specific embodiment
The present invention will be further explained with reference to the accompanying drawing.
It is as shown in Figure 1 a kind of steam coal separation technique, comprising: raw coal carries out dry method depth by Double-layer elastic classifying screen
Classification, one layer of on-the-sieve material of Double-layer elastic classifying screen enter crusher, after being crushed and on two layers of sieve of Double-layer elastic classifying screen
Material enters desliming screen together and carries out dry method desliming, the undersize material conduct of the undersize material and desliming screen of Double-layer elastic classifying screen
Smalls product；The on-the-sieve material of desliming screen enters gravity concentrator and is sorted, and light, the heavy product after sorting are taken off by vibrating screen de-mediated
Cleaned coal and spoil product are respectively obtained after water, the undersize material of vibrating screen enters subsequent black water (medium) processing system, realizes
System closed water circuit.
Specific embodiment 1:
Step A: raw coal feeds Double-layer elastic classifying screen by chute through belt conveyer and carries out dry method deep-graded, double
The upper layer screen size of the elastic classifying screen of layer is 100mm, and lower layer's screen size is 3mm；On one layer of sieve of Double-layer elastic classifying screen
Material+100mm enters crusher, discharges after broken and enters together with two layers of on-the-sieve material 100-3mm of Double-layer elastic classifying screen
Desliming screen carries out dry method desliming；
Step B: the undersize material -3mm of the Double-layer elastic classifying screen and undersize material -3mm of desliming screen is produced as last raw coal
Product are transported to last coal bunker by belt conveyer；
Step C: as shown in Fig. 2, the on-the-sieve material+3mm of desliming screen enters jigging machine and sorted, light product and again is obtained
Product, wherein heavy product obtains spoil product after the dehydration of coal tub elevator, is transported to waste bin through belt conveyer；
Step D: the light product of jigging machine enters the double-deck cleaned coal dewatering screen and is dehydrated, and two layers of screen size is respectively 25mm
And 2mm；Two layers of on-the-sieve material 25-2mm of the double-deck cleaned coal dewatering screen enter cleaned coal centrifuge and are dehydrated, and cleaned coal centrifuge goes out
One layer of on-the-sieve material+25mm of material and the double-deck cleaned coal dewatering screen is used as head coal product, is transported to cleaned coal storehouse through belt conveyer；
Step E: the undersize material -2mm of the double-deck cleaned coal dewatering screen and the centrifugate of cleaned coal centrifuge enter hydrocyclone
It being classified, the underflow of hydrocyclone is dehydrated by coarse slime sieve bend and Coarse slime centrifuge, coarse slime product is obtained, and
The centrifugate of the overflow of hydrocyclone, the undersize material of coarse slime sieve bend and Coarse slime centrifuge enters one section of thickener；
The overflow of F: one section of thickener of step enters two sections of thickeners, and the overflow of two sections of thickeners enters as recirculated water
Jigging machine is recycled；
The underflow of G: one section and two sections thickener of step enters coal slime mixing tank, and material squeezes into plate compression by pumping in bucket
Machine obtains coal slime product after filters pressing；The filtrate of plate and frame filter press enters filtrate tank, then returns one section of thickener by pump and carries out
Circular treatment.
Specific embodiment 2:
Step A: raw coal feeds Double-layer elastic classifying screen by chute through belt conveyer and carries out dry method deep-graded, double
The upper layer screen size of the elastic classifying screen of layer is 100mm, and lower layer's screen size is 3mm；On one layer of sieve of Double-layer elastic classifying screen
Material+100mm enters crusher, discharges after broken and enters together with two layers of on-the-sieve material 100-3mm of Double-layer elastic classifying screen
Desliming screen carries out dry method desliming；
Step B: the undersize material -3mm of the Double-layer elastic classifying screen and undersize material -3mm of desliming screen is produced as last raw coal
Product are transported to last coal bunker by belt conveyer；
Step C: it as shown in figure 3, the on-the-sieve material+3mm of desliming screen enters heavy-media separator and sorted, is gently produced
Object and heavy product, wherein heavy product is used as spoil product after Coal Stone Separation de-mediated dehydration, is transported to through belt conveyer
Waste bin；
Step D: the light product of heavy-media separator enters the double-deck head coal sculpingscreen, two layers of sieve pore after gravity flow screen de-mediated
Size is respectively 25mm and 2mm；Two layers of on-the-sieve material 25-2mm of the double-deck cleaned coal dewatering screen enter cleaned coal centrifuge and are dehydrated,
One layer of on-the-sieve material+25mm of the discharging of cleaned coal centrifuge and the double-deck head coal sculpingscreen is used as head coal product, through belt conveyer
It is transported to cleaned coal storehouse；
Step E: closed under the sieve of Coal Stone Separation be situated between, shunted under the sieve of gravity flow screen and (close and be situated between), the sieve of the double-deck head coal sculpingscreen
Lower conjunction Jie -2mm, which enters, closes Jie's bucket, and material squeezes into heavy-media separator by pumping in conjunction Jie's bucket, adds qualified medium；
Step F: it is dilute under the sieve of Coal Stone Separation be situated between, shunted under the sieve of gravity flow screen (dilute Jie), cleaned coal centrifuge centrifugate,
Dilute Jie -2mm enters dilute Jie's bucket under the sieve of the double-deck head coal sculpingscreen, and material squeezes into magnetic separator by pumping in dilute Jie's bucket, the magnetic after magnetic separation
Concentrate selection, which enters, closes Jie's bucket, and magnetic tailing then enters cyclone feeding bucket, then enters hydrocyclone and is classified；
Step G: the underflow of hydrocyclone is dehydrated by coarse slime sieve bend and Coarse slime centrifuge, obtains coarse slime production
The overflow of product, hydrocyclone enters one section of thickener；The centrifugation of the undersize material and Coarse slime centrifuge of coarse slime sieve bend
Liquid enters coal slime bucket, and material enters one section of thickener in bucket；
The overflow of H: one section of thickener of step enters two sections of thickeners, and the overflow of two sections of thickeners enters as recirculated water
Heavy-media separator is recycled；
The underflow of I: one section and two sections thickener of step enters coal slime mixing tank, and material is beaten by pump in the bucket of coal slime mixing tank
Enter plate and frame filter press, coal slime product is obtained after filters pressing；The filtrate of plate and frame filter press enters filtrate tank, then returns one section by pump
Thickener carries out circular treatment.
The above is only a preferred embodiment of the present invention, it should be pointed out 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 (4)
1. a kind of steam coal separation technique, which is characterized in that raw coal carries out dry method deep-graded by Double-layer elastic classifying screen, double
One layer of on-the-sieve material+100mm of the elastic classifying screen of layer enters crusher, is crushed rear and Double-layer elastic classifying screen two layers of oversize
Material 100-3mm enters desliming screen together and carries out dry method desliming, the undersize material -3mm of Double-layer elastic classifying screen and the sieve of desliming screen
Lower material -3mm is used as smalls product；The on-the-sieve material of desliming screen enters gravity concentrator and is sorted, light, heavy product warp after sorting
Cleaned coal, spoil product are respectively obtained after de-mediated dehydration, the dewatered undersize material of de-mediated enters at slurry circulating system
Reason realizes the closed cycle of system wash water.
2. a kind of steam coal separation technique according to claim 1, which is characterized in that the Double-layer elastic gradation sizing is
Upper layer and lower layer, and use one of flip flop screen, elastic bar screen, piano wire screen.
3. a kind of steam coal separation technique according to claim 1, which is characterized in that the desliming screen using vibrating screen,
One of flip flop screen.
4. a kind of steam coal separation technique according to claim 1, which is characterized in that the gravity concentrator using jigging machine or
Heavy-media separator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710320735.6A CN107008566B (en) | 2017-05-09 | 2017-05-09 | A kind of steam coal separation technique |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710320735.6A CN107008566B (en) | 2017-05-09 | 2017-05-09 | A kind of steam coal separation technique |
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| CN107008566B true CN107008566B (en) | 2019-06-07 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110052326B (en) * | 2018-08-24 | 2024-05-28 | 鄂尔多斯市中钰泰德煤炭有限公司 | System and method for purifying and recycling refined coal slime |
| CN109365120A (en) * | 2018-11-23 | 2019-02-22 | 金石资源集团股份有限公司 | A kind of fluorite lump ore gravity separation technology and its system |
| CN110170371B (en) * | 2019-05-10 | 2023-11-24 | 唐山森普工程设计有限公司 | Coarse coal slime heavy medium sorting system and sorting method |
| CN112871441A (en) * | 2020-12-29 | 2021-06-01 | 安徽理工大学 | Non-quantitative washing method for low-quality coal slime |
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| CN204523212U (en) * | 2015-03-09 | 2015-08-05 | 北京昊华能源股份有限公司 | Flip flop screen and dense-medium shallow-tank separator are at the use in conjunction device of Coal Preparation Plant |
-
2017
- 2017-05-09 CN CN201710320735.6A patent/CN107008566B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4282088A (en) * | 1980-03-03 | 1981-08-04 | Linatex Corporation Of America | Process for cleaning fine coal |
| CN101716552A (en) * | 2009-12-28 | 2010-06-02 | 河南理工大学 | Raw coal washing process capable of realizing non-polar ash conditioning |
| CN102773153A (en) * | 2012-07-16 | 2012-11-14 | 中国矿业大学 | Lignite separation process |
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