CN113908975A - Dry-wet combined separation method for power coal - Google Patents
Dry-wet combined separation method for power coal Download PDFInfo
- Publication number
- CN113908975A CN113908975A CN202111057457.2A CN202111057457A CN113908975A CN 113908975 A CN113908975 A CN 113908975A CN 202111057457 A CN202111057457 A CN 202111057457A CN 113908975 A CN113908975 A CN 113908975A
- Authority
- CN
- China
- Prior art keywords
- coal
- dry
- sieve
- clean coal
- classification
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000003245 coal Substances 0.000 title claims abstract description 116
- 238000000926 separation method Methods 0.000 title claims abstract description 43
- 239000000463 material Substances 0.000 claims abstract description 16
- 238000010332 dry classification Methods 0.000 claims abstract description 15
- 239000007787 solid Substances 0.000 claims abstract description 10
- 241001584775 Tunga penetrans Species 0.000 claims abstract description 5
- 238000002156 mixing Methods 0.000 claims abstract description 5
- 239000002245 particle Substances 0.000 claims description 4
- 238000012216 screening Methods 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 36
- 238000000034 method Methods 0.000 abstract description 15
- 230000008901 benefit Effects 0.000 abstract description 9
- 230000002950 deficient Effects 0.000 abstract description 6
- 230000018044 dehydration Effects 0.000 abstract description 3
- 238000006297 dehydration reaction Methods 0.000 abstract description 3
- 239000000047 product Substances 0.000 description 18
- 238000005516 engineering process Methods 0.000 description 5
- 238000002360 preparation method Methods 0.000 description 5
- 238000001035 drying Methods 0.000 description 4
- 239000000428 dust Substances 0.000 description 4
- 238000011084 recovery Methods 0.000 description 4
- 239000006148 magnetic separator Substances 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 238000000746 purification Methods 0.000 description 3
- 241000196324 Embryophyta Species 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000012467 final product Substances 0.000 description 2
- 238000009776 industrial production Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 239000010878 waste rock Substances 0.000 description 2
- 235000020985 whole grains Nutrition 0.000 description 2
- 240000005561 Musa balbisiana Species 0.000 description 1
- 235000018290 Musa x paradisiaca Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 235000013339 cereals Nutrition 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
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
- 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
-
- 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
- B03B4/00—Separating by pneumatic tables or by pneumatic jigs
- B03B4/06—Separating by pneumatic tables or by pneumatic jigs using fixed and inclined tables ; using stationary pneumatic tables, e.g. fluidised beds
-
- 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
- Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
Abstract
The invention provides a dry-wet combined separation method for power coal, which comprises the following specific steps: performing dry classification on raw coal, feeding oversize I into a movable sieve jigger for separation to obtain large pieces of clean coal, gangue and permeable sieve, and feeding the permeable sieve into a bucket elevator for dehydration; performing dry classification on the undersize product I to obtain an oversize product II and an undersize product II, and enabling the oversize product II to enter a concentrated phase gas-solid fluidized bed separator to obtain mixed block clean coal and gangue; dry grading the mixed lump clean coal to obtain a middle lump or mixed lump clean coal and fine clean coal; and mixing the through-sieve material and the undersize material II dehydrated by the bucket elevator into the fine clean coal. The full-swing sieve jig has the advantages of high sorting precision of large coal blocks, low water consumption and suitability for arid water-deficient areas, fully exerts the advantages of high sorting precision of the dense-phase gas-solid fluidized bed on mixed raw coal blocks, does not need water, does not need a coal slime water treatment system, has simplified process and high sorting precision, realizes the maximization of the yield of clean coal, and has low investment and operation cost.
Description
Technical Field
The invention relates to the field of coal separation, in particular to a dry-wet combined separation method for power coal.
Background
At present, a water-based wet separation technology is generally adopted in the field of coal separation, and practice shows that the wet separation has the following defects: (1) the applicability to arid areas, alpine areas and easily-argillized coal is low; (2) a large amount of slime water is generated in the wet separation process, and the investment and operation cost of a coal preparation plant are increased by treating the slime water; (3) after the coal slime water is sequentially concentrated and filter-pressed, the moisture of the final product is higher than 20%, the calorific value is low, the final product is not easy to sell, and the economic benefit of an enterprise is reduced; (4) although the water for wet coal preparation realizes closed cycle, moisture exists in the product, so that the water consumption is still large.
The coal yield of China is large, the raw coal yield of the nation in 2020 is 39 hundred million tons, the raw coal selection rate is 74.1%, the lowest water consumption of the coal selected from the raw coal per ton is 0.065 cubic meter according to GB/T18916.11-2012, and the raw coal selection amount in 2020 is calculated to be 28.9 hundred million tons according to the water consumption, and at least 1.8 hundred million cubic meters of water resources are consumed. More than two thirds of coal resources in China are distributed in arid water-deficient areas such as northwest, north and the like, and power coal is taken as a main material, so that the whole-grain dry separation technology or partial-grain dry separation technology is adopted to replace whole-grain wet separation, and the method has important significance for saving water resources and realizing effective separation of the power coal.
Chinese utility model patent 202021063058.8 discloses a processing system is selected separately in grades futilely, wet dual-purpose, and this patent has increased the dry process of fine grain coal and has classified on the basis that wet separation was selected separately, and dry process takes off the powder link promptly, and the lump coal adopts dense medium shallow slot sorter to select separately, the end coal adopts dense medium cyc-current ware to select separately behind the dry process powder removal, and this patent exists following not enoughly: (1) the method is characterized in that a dry separation method is not involved, lump coal is separated by a dense medium shallow slot separator, and slack coal is separated by a dense medium cyclone, and the method is a dense medium wet separation method, the circulating medium is high in mass, and the water amount in the required circulating medium is high; (2) a medium recovery and purification system and a product dehydration system are required to be configured, the medium recovery and purification system comprises a primary medium removal sieve, a secondary medium removal sieve, a magnetic separator, a centrifugal machine, a dilute medium barrel, a qualified medium barrel, a corresponding slurry pump and other equipment, and the water consumption (water consumption) taken away from the surface of a product is large; (3) after dry-process de-powdering, although the amount of the final coal entering the dense-medium cyclone is reduced, according to the regulation of the amount of the secondary coal slime in a coal preparation process design practical technical manual (2 nd edition), lump coal and the final coal still generate a large amount of secondary coal slime in the separation process, a secondary de-medium screen needs to be provided with water spray, a large amount of coal slime water is finally generated, a coarse coal slime separation system and a coal slime water treatment system still need to be configured, and the water consumption of coarse coal slime products and fine coal slime products is large. (4) The process is relatively complex, has high operation and capital investment, and has low adaptability to coal separation in arid water-deficient areas.
Chinese invention patent 201510819633.X discloses a clean process and a clean system for coal full-size fraction dry separation, which mainly comprises the following separation steps: pre-discharging waste rocks of 100-0mm raw coal by adopting a composite dry separator, classifying 100-0mm clean coal by 6mm, classifying 100-6mm mixed blocks by adopting a dry heavy medium fluidized bed, classifying 6-0mm size fraction by 3mm, classifying 6-3mm size fraction by adopting a dry vibration heavy medium fluidized bed, and classifying 3-0mm size fraction by adopting a dry electric separator or a dry magnetic separator. The invention has the following defects: (1) according to the regulation of coal washing engineering design specifications (GB50359-2016), the operation condition of the air separator is that the separation size fraction is 80-6mm, and the possible deviation E value is 0.23-0.28 mm. It can be seen that an air classifier can be used to sort the clumps, but the sorting accuracy is only 1/6 for dense media sorting. The size fraction of the fed materials in the patent is 100-0mm, and the size fraction is too wide, so that the sorting precision is further reduced, effective sorting cannot be achieved, and a large amount of dust can be generated. (2) The feeding size fraction of the dry-method dense medium fluidized bed is 100-6mm, and the range is too wide, so that the sorting precision is reduced, and the treatment capacity of the sorting machine is influenced. (3) The dry-method vibration dense medium fluidized bed, dry-type electric separator and dry-type magnetic separator separation technology is in the laboratory research stage, and the technical conditions for industrial production are not available at present. (4) The dry method has more classification and separation links, complex process, larger dust amount, strict technical requirements on a dedusting recovery system and higher capital construction and operation costs.
Disclosure of Invention
The invention provides a dry-wet combined separation method for power coal, which is suitable for arid water-deficient areas, has the advantages of simplified process, high separation precision, good operation stability, small dust amount, environmental friendliness and suitability for industrial production.
The technical scheme of the invention is realized as follows: a dry-wet combined separation method for power coal comprises the following steps:
a. performing dry classification on raw coal to obtain oversize I and undersize I, sorting the oversize I in a movable sieve jigger to obtain large pieces of clean coal, gangue and a through-sieve material, and dewatering the through-sieve material in a bucket elevator;
b. and d, carrying out dry classification on the undersize product I obtained in the step a to obtain an oversize product II and an undersize product II, and enabling the oversize product II to enter a dense phase gas-solid fluidized bed separator to obtain mixed block clean coal and gangue.
c. B, dry grading the mixed lump clean coal in the step b to obtain middle lump or mixed middle lump clean coal and fine clean coal;
d. and (c) mixing the thoroughly-screened material obtained after the dewatering of the step a by the bucket elevator and the undersize material II obtained in the step b into the fine clean coal obtained in the step c.
Further, the size fraction of the raw coal in the step a is 150-0 mm.
Furthermore, the dry method of the step a adopts an inclined linear vibrating screen, and the classification granularity is 50-35 mm.
And further, a relaxation sieve is adopted in the dry classification of the step b, and the classification granularity is 6-3 mm.
And furthermore, the dry classification in the step c adopts a horizontal linear vibrating screen, and the classification granularity is 25-13 mm.
The invention has the beneficial effects that:
the full-swing sieve jig has the advantages of high sorting precision of large coal blocks, low water consumption and suitability for arid water-deficient areas, fully exerts the advantages of high sorting precision of the dense-phase gas-solid fluidized bed on mixed raw coal blocks and no need of water, does not need a coal slime water treatment system, has simplified process and high sorting precision, realizes the maximization of the yield of clean coal, and has low investment and operation cost, and the specific advantages are as follows:
(1) the full-swing sieve jig has the advantages of high sorting precision of the large coal blocks, low water consumption and suitability for arid water-deficient areas. According to the specification of GB50359-2016, the imperfection of the movable sieve jig is 0.09-0.11, and the sorting density of the waste rock of the power coal in production practice is generally 1.75-1.85g/cm3And calculating the E value of the movable sieve jig to be 0.08-0.09, wherein the sorting precision is 3 times that of the combined dry-method sorter, and in addition, the external water of the large clean coal and the large gangue is 8-10%, and the water carrying capacity of the product is small.
(2) The invention fully exerts the advantages of high separation precision of the dense-phase gas-solid fluidized bed separator on the mixed raw coal and no need of water. The dense phase gas-solid fluidized bed separator is dense medium dry separation equipment, is suitable for efficiently separating medium-mixed blocks or small mixed blocks, the separation size fraction can be 50-6mm or 35-3mm, and the obtained E value is 0.05-0.08.
(3) A coarse slime separation system and a slime water treatment system are not needed. The amount of the through sieve in the movable sieve jig is small, the fine clean coal is directly doped after being dehydrated by the bucket elevator, the dry separation technology is adopted for 50-6mm raw coal, wet or dry separation is not carried out on 6 (or 3) -0mm power coal, the dust amount is small, and the yield of the clean coal is improved to the maximum extent on the premise of ensuring that the environmental protection requirement and the product requirement are met.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a process flow diagram of a dry-wet combined separation method for power coal according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention.
As shown in FIG. 1, a dry-wet combined separation method for power coal comprises the following steps:
a. performing dry classification on raw coal to obtain oversize I and undersize I, wherein the oversize I is bulk raw coal, the undersize I is mixed raw coal, the oversize I is separated in a movable sieve jigger to obtain bulk clean coal, gangue and a through-sieve, and the through-sieve enters a bucket elevator to be dehydrated;
b. and d, carrying out dry classification on the undersize product I obtained in the step a to obtain an oversize product II and an undersize product II, wherein the oversize product II is the mixed block raw coal, and the oversize product II enters a dense phase gas-solid fluidized bed separator to obtain the mixed block clean coal and gangue.
c. B, dry grading the mixed lump clean coal in the step b to obtain middle lump or mixed middle lump clean coal and fine clean coal;
d. and (c) mixing the thoroughly-screened material obtained after the dewatering of the step a by the bucket elevator and the undersize material II obtained in the step b into the fine clean coal obtained in the step c.
And the size fraction of the raw coal in the step a is 150-0 mm.
The dry classification of the step a adopts an inclined linear vibrating screen, and the classification granularity is 50-35mm, such as 50, 40 or 35 mm.
And (c) dry classification in the step b adopts a relaxation sieve, and the classification particle size is 6-3mm, such as 6 or 3 mm.
And c, adopting a horizontal linear vibrating screen for dry classification in the step c, wherein the classification granularity is 25-13mm, such as 25 or 13 mm.
Taking the scale of a power coal preparation plant as an example and taking 180 ten thousand tons per year as an example, the separation process is as follows:
a. dry grading 150-0mm raw coal by using 1 banana sieve (the model is ABS30 multiplied by 48, the sieve pore is 50mm), sorting 150-50mm oversize I in 1 movable sieve jigger (the model is YWT1/2.2) to obtain 150-50m large clean coal, 150-50mm waste rock and 1-0mm sieve permeable object, and dehydrating the sieve permeable object by using 1 bucket elevator;
b. b, dry grading the undersize I of 50-0mm in the step a by adopting 2 relaxation sieves (the model is KRL/ED3 multiplied by 6.1m, the sieve pores are 6mm), feeding the oversize II of 50-6mm into 1 concentrated phase gas-solid fluidized bed separator (the model is GZQ-200) to obtain mixed fine coal and gangue, feeding the medium discharged out of the separator into a medium recovery and purification system, and feeding the circulating medium and the supplemented medium into the concentrated phase gas-solid fluidized bed separator;
c. dry grading 50-6mm mixed block clean coal by using 1 horizontal linear vibrating screen (model AHS18 multiplied by 48, screen hole 25mm) to obtain 50-25mm medium block clean coal and 25-6mm mixed small block clean coal;
d. and d, mixing the 1-0mm of through-sieve material obtained after the dehydration of the step a by a bucket elevator and the 6-0mm of undersize material obtained by the relaxation sieve of the step b into 25-6mm of small mixed clean coal obtained in the step c to obtain 25-0mm of powder clean coal.
The coal preparation product balance table is shown in table 1. The raw coal has high internal water content of 4%, resulting in total water content of 10.72, calorific value below 5000Kcal/Kg, and ash content of 23.34%, and cannot be sold directly. After the separation process is used for treatment, the calorific values of the large clean coal and the middle clean coal are about 6000Kcal/Kg, the calorific value of the fine clean coal is close to 5500Kcal/Kg, the ash content is effectively reduced, the production requirement is met, and the yield of the clean coal is maximized.
TABLE 1 coal dressing product balance table
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (5)
1. A dry-wet combined separation method for power coal is characterized by comprising the following steps:
a. performing dry classification on raw coal to obtain oversize I and undersize I, sorting the oversize I in a movable sieve jigger to obtain large pieces of clean coal, gangue and a through-sieve material, and dewatering the through-sieve material in a bucket elevator;
b. b, dry grading the undersize I obtained in the step a to obtain an oversize II and an undersize II, and enabling the oversize II to enter a dense-phase gas-solid fluidized bed separator to obtain mixed fine coal and gangue;
c. b, dry grading the mixed lump clean coal in the step b to obtain middle lump or mixed middle lump clean coal and fine clean coal;
d. and (c) mixing the thoroughly-screened material obtained after the dewatering of the step a by the bucket elevator and the undersize material II obtained in the step b into the fine clean coal obtained in the step c.
2. The dry-wet combined separation method for power coal as claimed in claim 1, wherein the raw coal of step a is 150-0mm raw coal obtained by screening and crushing.
3. The dry-wet combined separation method for power coal as claimed in claim 1, wherein the dry classification in step a adopts an inclined linear vibrating screen, and the classification particle size is 50-35 mm.
4. The dry-wet combined separation method for power coal as claimed in claim 1, wherein the dry classification in step b adopts a relaxation sieve, and the classification particle size is 6-3 mm.
5. The dry-wet combined separation method for power coal as claimed in claim 1, wherein the dry classification in step c is carried out by using a horizontal linear vibrating screen, and the classification particle size is 25-13 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111057457.2A CN113908975B (en) | 2021-09-09 | 2021-09-09 | Dry-wet combined sorting method for power coal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111057457.2A CN113908975B (en) | 2021-09-09 | 2021-09-09 | Dry-wet combined sorting method for power coal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113908975A true CN113908975A (en) | 2022-01-11 |
| CN113908975B CN113908975B (en) | 2024-01-23 |
Family
ID=79234490
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111057457.2A Active CN113908975B (en) | 2021-09-09 | 2021-09-09 | Dry-wet combined sorting method for power coal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113908975B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114849892A (en) * | 2022-05-07 | 2022-08-05 | 金易通（天津）智能装备有限公司 | Dry dust-free lump material dry separation method and system |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4938864A (en) * | 1988-08-23 | 1990-07-03 | Mare Creek Industries, Inc. | Method for processing fine coal |
| US5197398A (en) * | 1991-04-16 | 1993-03-30 | Electric Power Research Institute | Separation of pyrite from coal in a fluidized bed |
| CN1883812A (en) * | 2006-07-08 | 2006-12-27 | 枣庄矿业(集团)有限责任公司 | Raw coal sorting process |
| CN101482005A (en) * | 2009-02-02 | 2009-07-15 | 河南理工大学 | Down-hole gross coal dirt-discharging and mine water treating combined process |
| CN102211054A (en) * | 2011-05-30 | 2011-10-12 | 中国矿业大学 | Process for sorting coarse coal slime by utilizing heavy medium liquid-solid fluidized bed |
| CN105268544A (en) * | 2015-12-01 | 2016-01-27 | 中国矿业大学 | Wide-particle-size coal series kaolinite upgrading process based on fluidization sorting |
| CN108296009A (en) * | 2018-01-29 | 2018-07-20 | 内蒙古伊泰煤炭股份有限公司 | Coal deep working method and coal processing method |
| CN109331989A (en) * | 2018-09-18 | 2019-02-15 | 中国矿业大学 | A kind of coal wholegrain grade dry method dehydration deliming system and technique |
| CN109482494A (en) * | 2018-11-22 | 2019-03-19 | 中国矿业大学 | A kind of thermal coal wholegrain grade dry method upgrading discharge refuse technique |
| CN109569874A (en) * | 2018-11-26 | 2019-04-05 | 天津美腾科技有限公司 | Steam coal separation system, steam coal separation technique and application |
| CN109718944A (en) * | 2019-03-08 | 2019-05-07 | 中国矿业大学 | A kind of aqueous medium underground coal preparation technique |
| CN109746116A (en) * | 2019-02-12 | 2019-05-14 | 中国矿业大学 | The method for separating of coal oil feed coal enrichment based on aqueous medium sorting |
| CN109794349A (en) * | 2019-03-08 | 2019-05-24 | 中国矿业大学 | A kind of underground coal preparation technique |
-
2021
- 2021-09-09 CN CN202111057457.2A patent/CN113908975B/en active Active
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4938864A (en) * | 1988-08-23 | 1990-07-03 | Mare Creek Industries, Inc. | Method for processing fine coal |
| US5197398A (en) * | 1991-04-16 | 1993-03-30 | Electric Power Research Institute | Separation of pyrite from coal in a fluidized bed |
| CN1883812A (en) * | 2006-07-08 | 2006-12-27 | 枣庄矿业(集团)有限责任公司 | Raw coal sorting process |
| CN101482005A (en) * | 2009-02-02 | 2009-07-15 | 河南理工大学 | Down-hole gross coal dirt-discharging and mine water treating combined process |
| CN102211054A (en) * | 2011-05-30 | 2011-10-12 | 中国矿业大学 | Process for sorting coarse coal slime by utilizing heavy medium liquid-solid fluidized bed |
| CN105268544A (en) * | 2015-12-01 | 2016-01-27 | 中国矿业大学 | Wide-particle-size coal series kaolinite upgrading process based on fluidization sorting |
| CN108296009A (en) * | 2018-01-29 | 2018-07-20 | 内蒙古伊泰煤炭股份有限公司 | Coal deep working method and coal processing method |
| CN109331989A (en) * | 2018-09-18 | 2019-02-15 | 中国矿业大学 | A kind of coal wholegrain grade dry method dehydration deliming system and technique |
| CN109482494A (en) * | 2018-11-22 | 2019-03-19 | 中国矿业大学 | A kind of thermal coal wholegrain grade dry method upgrading discharge refuse technique |
| CN109569874A (en) * | 2018-11-26 | 2019-04-05 | 天津美腾科技有限公司 | Steam coal separation system, steam coal separation technique and application |
| CN109746116A (en) * | 2019-02-12 | 2019-05-14 | 中国矿业大学 | The method for separating of coal oil feed coal enrichment based on aqueous medium sorting |
| WO2020164187A1 (en) * | 2019-02-12 | 2020-08-20 | 中国矿业大学 | Concentration and separation method for raw coal of coal-to-liquid fuels on the basis of water medium separation |
| CN109718944A (en) * | 2019-03-08 | 2019-05-07 | 中国矿业大学 | A kind of aqueous medium underground coal preparation technique |
| CN109794349A (en) * | 2019-03-08 | 2019-05-24 | 中国矿业大学 | A kind of underground coal preparation technique |
Non-Patent Citations (4)
| Title |
|---|
| 曹亦俊: "煤矿井下选煤技术现状和展望", 《采矿与安全工程学报》, vol. 37, no. 1, pages 192 - 201 * |
| 李鹏宇: "不同动力煤洗选工艺的对比分析", 《水力采煤与管道运输》, no. 4, pages 57 - 60 * |
| 薛熠: "解决选煤产业水资源缺乏的途径", 《选煤技术》, no. 3, pages 71 - 73 * |
| 赵跃民: "干法重介质流化床选煤技术及工业应用", 《2014年全国选煤学术交流会论文集》, pages 5 - 12 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114849892A (en) * | 2022-05-07 | 2022-08-05 | 金易通（天津）智能装备有限公司 | Dry dust-free lump material dry separation method and system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113908975B (en) | 2024-01-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105597915B (en) | The wide dual Jie's whole coarse slime separating process of grade can be achieved in one kind | |
| CN109794349B (en) | Underground coal dressing process | |
| CN105268544B (en) | A kind of wide grade Coaseries kaolin process for upgrading based on fluidization sorting | |
| CN106179717B (en) | A kind of full level of thermal coal is selected in simplified heavy medium sorting process | |
| CN109331989B (en) | Dry dewatering and deashing process for coal full-size fraction | |
| CN102728455B (en) | Combined separation process for gravity concentration and flotation of difficult separation coal slime with high intermediate density material content | |
| CN105289985A (en) | Coal full-size dry separation cleaning process and system | |
| CN205797474U (en) | A kind of high ash coarse slime degree of depth fall ash system | |
| CN112371325A (en) | Power coal grading washing process | |
| CN110523524B (en) | Simplified sorting process for full-grade sorting of anthracite | |
| CN110560258A (en) | device and process for selecting ultra-clean coal from jigging overflow coal slime through physical cyclone recovery | |
| CN113145292A (en) | Grading and selecting method for multistage screening and powder removal of power coal | |
| CN105964392B (en) | A kind of coal separation desliming system | |
| CN105195427A (en) | Iron ore dry separation technology based on concentrated-phase gas-solid fluidized bed | |
| CN214021353U (en) | Gravity-flotation combined separation system for refractory fluorite ores | |
| CN113908975A (en) | Dry-wet combined separation method for power coal | |
| CN115945288A (en) | Metal mineral enrichment process and system based on dry separation equipment | |
| CN110170370B (en) | System and process for reducing lower limit of gravity separation granularity of dense medium coal preparation plant | |
| CN209997781U (en) | Coarse coal slime dense medium sorting system | |
| CN114247560B (en) | Full-size ore pretreatment process and device | |
| CN113560033B (en) | Intelligent coal powder removal washing and selecting system and method | |
| CN104741214A (en) | System and method for preparing pulverized coal fuel of pulverized-coal boiler by using coal washing tailings | |
| CN115646638A (en) | Gasification slag fine separation process | |
| CN110170371B (en) | Coarse coal slime heavy medium sorting system and sorting method | |
| CN114405663A (en) | Wet easily-argillized power coal wide-size-fraction selected coal slime non-quantitative process |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |