CN1210107C - Heavy medium separating process for slime - Google Patents
Heavy medium separating process for slime Download PDFInfo
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- CN1210107C CN1210107C CN 03124283 CN03124283A CN1210107C CN 1210107 C CN1210107 C CN 1210107C CN 03124283 CN03124283 CN 03124283 CN 03124283 A CN03124283 A CN 03124283A CN 1210107 C CN1210107 C CN 1210107C
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- Prior art keywords
- coal
- section
- funnel
- medium
- sieve
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- 238000000034 method Methods 0.000 title abstract description 12
- 239000003245 coal Substances 0.000 claims abstract description 125
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000006148 magnetic separator Substances 0.000 claims abstract description 14
- 238000005516 engineering process Methods 0.000 claims description 16
- 238000000926 separation method Methods 0.000 claims description 16
- 230000001404 mediated effect Effects 0.000 claims description 10
- 239000007921 spray Substances 0.000 claims description 8
- 239000000725 suspension Substances 0.000 claims description 7
- 230000011218 segmentation Effects 0.000 claims description 4
- 238000012216 screening Methods 0.000 claims description 2
- 239000003250 coal slurry Substances 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 6
- 239000007788 liquid Substances 0.000 abstract description 2
- 238000005507 spraying Methods 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 12
- 229910052742 iron Inorganic materials 0.000 description 6
- 238000002360 preparation method Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 239000007787 solid Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000007885 magnetic separation Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000009738 saturating Methods 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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Abstract
The present invention discloses a heavy medium separating technique for coal slurry. A screen plate of a fancy coal medium removing vibration screen is divided into three sections, a screen seam delta of the first section is from 1 to 1.5mm, a screen seam delta of the second section is from 0.5 to 0.75mm, a screen seam delta of the third section is from 0.5 to 0.75mm, the three sections of the screen plate are connected into a whole to be positioned in a screen box, wherein water spraying devices are arranged above the second section of the screen plate and the third section of the screen plate, and an individual funnel is arranged under each section of the screen plate. At the first section of the screen plate, coal slurry, suspending liquid and a qualified medium under a curved screen shunt to be separated finely in a coal slurry heavy medium cyclone; at the second section of the screen plate, a dilute medium under a screen enters a raw coal qualified medium barrel from an outlet of the second funnel; at the third section of the screen plate, qualified coarse coal slurry of ash and the dilute medium flow in the third funnel to a fancy coal magnetic separator. The heavy medium separating technique can ensure the product quality of the coal slurry and can improve the comprehensive separating effect on the coal slurry.
Description
Technical field
The present invention relates to a kind of coal preparation technique, particularly a kind of coal slime dense medium separation technology.
Background technology
All there is industrialized coal slime dense medium separation system in countries such as Holland, the U.S., South Africa, but be+0.5 (0.75) mm grade and-0.5 (0.75) mm grade raw coal sink float technology respectively, coal slime heavily be situated between system must use separately through special processing handle could use-the 0.02mm grain size content reaches the spy's magnetic iron ore carefully more than 90%.Because this magnetic iron ore processing charges height is difficult to again reclaim, and adds full factory process system complexity, is not widely used always.
1993, φ 150mm heavy medium cyclone sorting 0.5 (1.0)-0mm fine coal technology that Tangshan Subinst, Coal Science Research Central Inst is succeeded in developing combines with heavy medium cyclone sorting 45 not desliming of (40)-0mm raw coal technologies, form single dense medium coal cleaning process system, simplified technological process greatly.Although simplified technological process, still need use-0.02mm level content reaches the special thin magnetic iron ore more than 90%.The consumption of its medium and processing charges are still higher, are difficult to apply in Large Coal Washing Plant.
1996 to 2000, country's " 95 " emphasis tackling of key scientific and technical problems problem is declared and accepted to Tangshan Subinst, Coal Science Research Central Inst, this important function for of research content is: in using the coal preparation technique system of heavy medium cyclone as main separation equipment, utilize in the heavy medium cyclone assorting room the grading of medium solid and spontaneous superfine grade magnetic iron ore with roughly select suspension that cleaned coal mud mixes as separating medium and selected raw material, to carry out dense media selected to roughly selecting cleaned coal mud, effective lower limit of separation can be dropped to below 0.1 (0.074) mm.This technology can be made medium solid with single more coarsely graded magnetic iron ore, realizes raw coal mixing sorting and coal slime combined sorting.Its technological process is as follows: the cleaned coal after the heavy medium cyclone sorting enters sieve bend and vibratory sieve de-mediated dehydration.In this technology, the qualified medium overwhelming majority under the cleaned coal sieve bend directly enters the qualified medium bucket and recycles.Sieve splitter section down enters coal slime qualified medium bucket, squeezes into the sorting of coal slime heavy medium cyclone with pump again.Qualified medium under the tail coal sieve bend all enters the qualified medium bucket and recycles.
Whole backwaters of cleaned coal vibration sculping screen such as Fig. 1 enter the cleaned coal magnetic separator with the overflow of coal slime heavy medium cyclone to carry out medium and reclaims, and the backwater of tail coal vibration sculping screen enters the tail coal magnetic separator with the underflow of coal slime heavy medium cyclone to carry out medium and reclaim.
Magnetic concentrate enters the qualified medium bucket and recycles, and cleaned coal magnetic separator mine tailing enters cleaned coal mud classification recovery system, and the coarse coal slurry of recovery mixes head coal product.Tail coal magnetic separator mine tailing enters tail coal mud system.This technology mainly is the method for separating that adopts with the shared coal slime dense media than the coarse fraction medium solid of heavy medium cyclone, dielectric dissipation is less, applied in some coal preparation plants, but the ash content of the final cleaned coal mud of most of coal preparation plant can not satisfy quality requirement.Its weak point is, the rare medium under the cleaned coal vibratory sieve all becomes final products after the magnetic separation de-mediated, that is: the cleaned coal sieve bend do not purify and the coal slime that enters vibratory sieve as yet not through the selected final products that just become of coal slime heavy medium cyclone.Higher to the primary slime ash content, the coal slime washability is relatively poor, final cleans ash requires lower coal preparation plant, thus can because cleaned coal sculping screen coal slime down without the selected direct quality that influences marketable coal as final products.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, and provide a kind of make as far as possible all coal slimes especially the fine fraction coal slime all pass through the coal slime dense medium separation, to improve the comprehensive dressing effect of coal slime, reduce the ash content of cleaned coal mud, guarantee the coal slime dense medium separation technology of the product quality of cleaned coal mud.
For achieving the above object, the present invention takes following technical measures, and the sieve plate of cleaned coal de-mediated vibratory sieve is divided into three sections from the feeding end to the discharge end, and the sieve plate of segmentation connects as one and places in the screen box, and wherein the top of second, third section sieve plate is equipped with water injector; The below of every section sieve plate is equipped with sieve funnel down, is followed successively by first funnel, second funnel and the 3rd funnel, and the screenings segmentation of cleaned coal vibration sculping screen enters different funnels.
Described sieve plate is divided into three sections from the feeding end to the discharge end, sieve seam δ=1～1.5mm of first section, sieve seam δ=0.5～0.75mm of second section, sieve seam δ=0.5～0.75mm of the 3rd section.
The outlet of described first funnel communicates with the coal slime heavy medium cyclone, and the outlet of second funnel communicates with raw coal qualified medium bucket, and the outlet of the 3rd funnel communicates with the cleaned coal magnetic separator.
At first section of cleaned coal vibration sculping screen sieve plate, the qualified medium shunting comes along toward the coal slime heavy medium cyclone selected under coal slime and suspension and the sieve bend; At second section of sieve plate, water injector is sprayed water downwards, and the rare medium under the sieve is gone to raw coal qualified medium bucket by the outlet of second funnel; The 3rd section of sieve plate, the qualified coarse grain coal slime of minute quantity ash content is through the 3rd section water spray, and rare medium flows into the 3rd funnel and goes to the cleaned coal magnetic separator, and the cleaned coal in the screen box is discharged by the outlet of screen box rear end.
First section, there is not water spray, the material under the sieve is gone to coal slime qualified medium bucket.It is selected that its effect is that the suspension (containing coal slime) that allows sieve bend not purify enters the coal slime heavy medium cyclone.Second section, water spray is arranged, undersize material is gone to raw coal qualified medium bucket, and its effect is to allow first section coal slime that purifies not yet come back to the dense medium separation system, in case directly discharge without the coal slime selected coal slime that heavily is situated between.The 3rd section, water spray is arranged, undersize material is gone to the cleaned coal magnetic separator, and its effect is dense media and the coarse grain coal slime that further removes in the cleaned coal, guarantees the de-mediated effect of cleaned coal.
Compared with prior art, the present invention is on the basis of original " coal slime dense medium separation Processes and apparatus ", adjusts the sieve seam size of cleaned coal de-mediated vibratory sieve, improves the sieve structure of funnel down, makes the trend of undersize material in order.Making the overwhelming majority roughly select cleaned coal mud, all to pass through the coal slime heavy medium cyclone selected, thereby can guarantee the product quality of cleaned coal mud, improves the comprehensive dressing effect of coal slime.
Description of drawings
Fig. 1 is the prior art constructions schematic diagram.
Fig. 2 is a structural representation of the present invention.
The specific embodiment
Below in conjunction with drawings and Examples in detail the present invention is described in detail.
The present invention is made up of linear vibrating screen, funnel etc.The screen box of linear vibrating screen is equipped with vibrator 6.The front end of cleaned coal de-mediated vibratory sieve sieve nest is provided with feeding mouth 1, and the rear end is provided with discharging opening 8.Its sieve plate 7 is divided into three sections from the feeding end to the discharge end, sieve seam δ=1～1.5mm of first section 2, sieve seam δ=0.5～0.75mm of second section 3, sieve seam δ=0.5～0.75mm of the 3rd section 5, three sections sieve plates 2,3,5 connect as one composition sieve plate 7 and place in the screen box, wherein the top of second section sieve plate 3 and the 3rd section sieve plate 5 is provided with water injector 4, and the below of every section sieve plate is equipped with sieve funnel down, is followed successively by first funnel 9, second funnel 10 and the 3rd funnel 11.
The outlet 12 of described first funnel 9 is connected with the coal slime heavy medium cyclone.The outlet 13 of second funnel 10 is connected with raw coal qualified medium bucket.The outlet 14 of the 3rd funnel 11 communicates with the cleaned coal magnetic separator.
Coal slime dense medium separation technology of the present invention, at first section 2 of cleaned coal vibration sculping screen sieve plate, the qualified medium shunting comes along toward the coal slime heavy medium cyclone selected under coal slime and suspension and the sieve bend; At second section 3 of sieve plate, water injector 4 is sprayed water downwards, and the rare medium under the sieve flows into second funnel 10, goes to raw coal qualified medium bucket by the outlet 13 of second funnel 10.At the 3rd section 5 of sieve plate, the coarse grain coal slime that the minute quantity ash content is qualified is sprayed water through the 3rd section water injector 4, and rare medium flows into the 3rd funnel 11 and goes to the cleaned coal magnetic separator, and the cleaned coal in the screen box is discharged by the outlet 8 of sieve nest rear end.
Because improved the sieve plate and the funnel of device, one aspect of the present invention makes the contained coal slime overwhelming majority of the oversize of sieve bend all enter the slime separation operation, guaranteed the stability of whole coal separation production technology system on the other hand again.
In process of production, the suspension that sieve bend does not purify enters into cleaned coal de-mediated vibratory sieve with cleaned coal, and cleaned coal de-mediated vibratory sieve does not add water spray for first section, and the qualified medium shunting comes along toward the coal slime heavy medium cyclone selected under sieve low suspension liquid and the sieve bend.Vibratory sieve adds the de-mediated water spray for second section, and sieve rare medium is down gone to raw coal qualified medium bucket, makes without selected coal slime and comes back to raw coal heavy medium cyclone pan feeding.Have only the water spray of the qualified coarse grain coal slime of a small amount of ash content through the 3rd section in vibratory sieve, saturating sieve is gone to the cleaned coal magnetic separator, and after magnetic separator was selected magnetic iron ore, cleaned coal mud was discharged into the classification dewatering operation.
Claims (4)
1, a kind of coal slime dense medium separation technology comprises cleaned coal vibration sculping screen, and sieve plate is a segmented, from the feeding end to the discharge end, be divided into three sections, the sieve plate of segmentation connects as one and places in the screen box, it is characterized in that, wherein the top of second, third section sieve plate is equipped with water injector; The below of every section sieve plate is equipped with sieve funnel down, is followed successively by first funnel, second funnel and the 3rd funnel, and the screenings segmentation of cleaned coal vibration sculping screen enters different operation funnels.
2, according to the described coal slime dense medium separation of claim 1 technology, it is characterized in that sieve seam δ=1～1.5mm of first section, sieve seam δ=0.5～0.75mm of second section, sieve seam δ=0.5～0.75mm of the 3rd section.
3, coal slime dense medium separation technology according to claim 1, it is characterized in that, the outlet of described first funnel and the coal slime sorter that heavily is situated between communicates, and the outlet of second funnel communicates with raw coal qualified medium bucket, and the outlet of the 3rd funnel communicates with the cleaned coal magnetic separator.
4, coal slime dense medium separation technology according to claim 1 is characterized in that, at first section of cleaned coal de-mediated vibration sieve plate, the qualified medium shunting comes along toward the coal slime heavy medium cyclone selected under coal slime and suspension and the sieve bend; At second section of sieve plate, water injector is sprayed water downwards, and the rare medium under the sieve is gone to raw coal qualified medium bucket by the outlet of second funnel; The 3rd section of sieve plate, the qualified coarse grain coal slime of minute quantity ash content is through the 3rd section water spray, and rare medium flows into the 3rd funnel and goes to the cleaned coal magnetic separator, and the cleaned coal in the screen box is discharged by the outlet of screen box rear end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03124283 CN1210107C (en) | 2003-05-07 | 2003-05-07 | Heavy medium separating process for slime |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03124283 CN1210107C (en) | 2003-05-07 | 2003-05-07 | Heavy medium separating process for slime |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1548233A CN1548233A (en) | 2004-11-24 |
| CN1210107C true CN1210107C (en) | 2005-07-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 03124283 Expired - Lifetime CN1210107C (en) | 2003-05-07 | 2003-05-07 | Heavy medium separating process for slime |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100441307C (en) * | 2005-04-08 | 2008-12-10 | 煤炭科学研究总院唐山分院 | Technique for classifying and retrieving suspension liquid from dense medium |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101284254B (en) * | 2008-06-04 | 2012-09-05 | 神华集团有限责任公司 | Floatation coal separation technique |
| CN101433880B (en) * | 2008-11-07 | 2012-05-23 | 倪志群 | Method for sorting coal ash |
| CN101716552B (en) * | 2009-12-28 | 2012-05-23 | 河南理工大学 | Raw coal washing process capable of realizing non-polar ash conditioning |
| CN102179290A (en) * | 2010-12-31 | 2011-09-14 | 杨灵奎 | Method for recycling clean coal from high-ash coal slurry tailings |
| CN108481613B (en) * | 2018-03-19 | 2020-09-11 | 河南理工大学 | Gravity separation recycling process for waste polyvinyl chloride plastic building templates |
| CN112156885B (en) * | 2020-08-17 | 2021-11-30 | 中国矿业大学 | Process for recycling coarse slime in qualified medium |
| CN112934651A (en) * | 2021-01-21 | 2021-06-11 | 国家能源集团国源电力有限公司 | Banana sieve |
| CN114950944B (en) * | 2022-05-27 | 2023-03-10 | 徐州工程学院 | Single-layer banana screen system with front-section medium removal and rear-section classification for coal dressing |
-
2003
- 2003-05-07 CN CN 03124283 patent/CN1210107C/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100441307C (en) * | 2005-04-08 | 2008-12-10 | 煤炭科学研究总院唐山分院 | Technique for classifying and retrieving suspension liquid from dense medium |
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| Publication number | Publication date |
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| CN1548233A (en) | 2004-11-24 |
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Owner name: ZHONGKUANG LVNENG (BEIJING) ENGINEERING TECHNOLOGY Free format text: FORMER OWNER: ZHAO SHUYAN Effective date: 20130918 Free format text: FORMER OWNER: LI HUI Effective date: 20130918 |
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Free format text: CORRECT: ADDRESS; FROM: 063000 TANGSHAN, HEBEI PROVINCE TO: 100080 HAIDIAN, BEIJING |
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Effective date of registration: 20130918 Address after: Beijing City 100080 square Haidian District Road No. 10 Building No. 1 room 1206 Patentee after: Zhongkuang Lvneng (Beijing) Engineering Technology Co.,Ltd. Address before: 063000 Tangshan City Hebei hi tech Development Zone Qinghua road Tangshan Guohua science and Technology Co., Ltd. Patentee before: Zhao Shuyan Patentee before: Li Hui |
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Address after: Room 618, 6 / F, building 1, yard 9, Longyue street, Mapo Town, Shunyi District, Beijing Patentee after: Beijing Guohua Technology Co.,Ltd. Address before: Beijing City 100080 square Haidian District Road No. 10 Building No. 1 room 1206 Patentee before: ZHONGKUANG LVNENG (BEIJING) ENGINEERING TECHNOLOGY Co.,Ltd. |
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