CN105797831B - Technique is selected in the dissociation of coal again in a kind of coking end - Google Patents
Technique is selected in the dissociation of coal again in a kind of coking end Download PDFInfo
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- CN105797831B CN105797831B CN201610165914.2A CN201610165914A CN105797831B CN 105797831 B CN105797831 B CN 105797831B CN 201610165914 A CN201610165914 A CN 201610165914A CN 105797831 B CN105797831 B CN 105797831B
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- 239000003245 coal Substances 0.000 title claims abstract description 91
- 238000010494 dissociation reaction Methods 0.000 title claims abstract description 27
- 230000005593 dissociations Effects 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000004939 coking Methods 0.000 title claims abstract description 23
- 238000000227 grinding Methods 0.000 claims abstract description 16
- 239000002994 raw material Substances 0.000 claims abstract description 6
- 238000005188 flotation Methods 0.000 claims description 18
- 230000008569 process Effects 0.000 claims description 8
- 238000004513 sizing Methods 0.000 claims description 8
- 238000000926 separation method Methods 0.000 claims description 6
- 230000002441 reversible effect Effects 0.000 claims description 5
- 238000007667 floating Methods 0.000 claims description 4
- 239000003814 drug Substances 0.000 claims description 3
- 238000010334 sieve classification Methods 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 8
- 239000002245 particle Substances 0.000 abstract description 8
- 238000012216 screening Methods 0.000 abstract description 3
- 238000005406 washing Methods 0.000 abstract 1
- 239000002956 ash Substances 0.000 description 18
- 238000005516 engineering process Methods 0.000 description 8
- 238000011084 recovery Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000010883 coal ash Substances 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000002776 aggregation Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000006399 behavior Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C21/00—Disintegrating plant with or without drying of the material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
- B02C23/14—Separating or sorting of material, associated with crushing or disintegrating with more than one separator
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/18—Adding fluid, other than for crushing or disintegrating by fluid energy
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Disintegrating Or Milling (AREA)
- Combined Means For Separation Of Solids (AREA)
- Crushing And Grinding (AREA)
- Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
Abstract
Technique is selected in the dissociation of coal again in a kind of coking end of the difficult choosing of high ash, belongs to coal washing field.Coal in raw material end is fed into disintegrating apparatus to be crushed, product after broken sorts into spiral, to throw the high density partial material removed in pan feeding, case of low density loads feeds short body grinding machine, product feeds three-product cyclone classifying screen and is classified after mill, the overflow of classifying screen and screenings enter floatation system, and underflow returns to spiral and sort again, dissociates.Its separating density is higher, and spiral throwing tail avoids high ash particle and enters grinding machine, had both reduced the load of grinding machine, and turn avoid pollution of the crushing for cleaned coal of high ash particle.
Description
Technical field
The present invention relates to one kind dissociation to select technique again, the coking end that the rare coking coal resource of recovery that is particularly suitable for use in uses
Technique is selected in the dissociation of middle coal again.
Background technology
The present invention is based on the broken practical technique selected again of coal in coking end, and main purpose is the rare coking coal money of recovery
Source.
With the continuous improvement of China's mechanical coal mining degree, Resource geology condition continue deteriorate and heavy media coal separation
Technology coal preparation plant extensive use, China be selected in ature of coal be constantly deteriorated, caused fine-graded coal slime ratio in assorting room
Sharply increase, the characteristics of " poor, thin, miscellaneous " is gradually presented in coal, and contain in the trend for continuing to deteriorate, its outstanding behaviours for middle coal
Amount is big, ash content is high and floatability is poor, and the outstanding problem that coal faces in assorting room in this part is exactly that cleans ash surpasses
Mark and tail coal ash content is relatively low, the problem of encountered in fine fraction coal slime processing procedure to coal resources efficiently separate with it is purifying
Using bringing great challenge.
Flotation, selective flocculation and oil aggregation etc. are traditional technological means of sorting fine grading coal slime, but only flotation
Technology is most ripe and extensive industrialization.Flotation technology has preferably sorting to make generally for the coal slime of -0.5mm grades
With, but middle coal has its unique property, it be in raw coal forming process low ash particle and high ash particle with less grain
The middle intergrowth that the mutually embedding cloth of degree is formed, ash content and former pit ash are closer to.If being directly entered flotation, in floatation process
In in this part coal can form cleaned coal pollution if into cleaned coal and make it that tail coal ash content is relatively low if entering tail coal, so not dissociating
Recovering effect is necessarily affected, and centering coal is dissociated the technique selected again, cash be present if primary grinding-floatation process
Some problems such as stone is overground, flotation of material cleans ash is exceeded after mill, so how middle coal dissociates, how to sort and be one and be worth
The problem of thinking, the practical technique for developing the low ash content cleaned coal in a kind of energy high efficiente callback in coal seem very necessary, and this is not only
Progress to particulate difficult separation coal mud sorting technology has huge facilitation, and for rare coking coal resource secondary recovery profit
With with great economic value.
The content of the invention
For the weak point of above-mentioned technology, there is provided it is a kind of based on middle coal dissociation select technique again, overcome it is traditional from
The deficiency of the technology of low ash extract coal is reclaimed in middle coal, profit again can not be reclaimed by fundamentally solving existing rare coking coal resource
Technique is selected in the dissociation of coal again in coking end.
To realize above-mentioned technical purpose, in coking end of the present invention the dissociation of coal select technique again, its step is as follows：
A. coal in end is fed into reversible hammer crusher as raw material and carries out preliminary broken dissociation, after tentatively crushing dissociation
Crushed product feed spiral and sized mixing, start spiral after sizing mixing and sorted；
B. two kinds of products of the high ash content tail coal of output and coarse-fine coal after spiral sorting, wherein high ash content tail coal is discharged,
Coarse-fine coal is fed into short body grinding machine and carries out ore grinding, obtains product after coarse-fine coal mill；
C. product feeds three-product cyclone classifying screen and carries out graded operation after coarse-fine coal is ground, by three products after graded operation
The overflow of cyclone classification sieve and undersize bulk flotation medicament feed size mixing equipment and sized mixing in advance together, three-product cyclone
Underflow product after classifying screen classification returns to spiral and carries out sorting circulation again；
D. sizing mixing in size mixing equipment is fed into floatation equipment and carries out separation operation, finally give floatation clean coal and flotation tail
Process is selected in two kinds of products of coal, the dissociation for completing coal in a coking end again.
The coal particle size upper limit is 13mm in described end；The particle size after cracking upper limit is 1mm；Described short body grinding machine is rod milling
Machine or autogenous tumbling mill；Described floatation equipment is flotation column.
Beneficial effect：The sorting process of coal in a kind of coking end based on the broken dissociation of middle coal is proposed, is realized to dilute
Lack effective recovery of coking coal resource：A, spiral separating density is higher, can in advance throw and remove under its optimal separating density
A part avoids the high ash material dissociateed and enters grinding machine, both significantly reduced through the broken high ash material dissociateed
The load of grinding machine, reduces energy consumption, turn avoid the pollution to follow-up flotation operation after high ash material is ground；B, short body mill
Machine both ensure that in, low-ash material fully dissociated, be unlikely to again produce be unfavorable for the overground existing of follow-up flotation operation
As；C, three-product cyclone classifying screen has higher classification efficiency, plays a part of being classified product after mill on stream,
Its overflow and screenings fully enters floatation system, and underflow returns to spiral and throws tail again.On the one hand it control into
Enter the material size of floatation system so that the thinner material fully dissociated enters flotation operation, prevents it in systems
Constantly circulation；On the other hand it ensure that the coarse granule not dissociated fully returns to spiral and continues to throw tail, dissociation, in order to avoid
Into floatation system；D, sorting process flow proposed by the present invention is simple, technology maturation, small investment, operating cost are low, economy effect
It is beneficial notable.
Brief description of the drawings
Fig. 1 is that the FB(flow block) of technique is selected in the dissociation of coal in coking end of the present invention again.
Fig. 2 is that the equipment contact figure of technique is selected in the dissociation of coal in coking end of the present invention again,
In figure：Coal in 1- raw materials end, 2- crushed products, 3- spiral tail coals, the coarse-fine coals of 4-, product after 5- is ground, 6-
Grading Overflow, 7- classification screenings, 8- classification underflows, 9- floating agents, ore pulp after 10- sizes mixing, 11- floatation clean coals, 12- flotation
Tail coal, A- reversible hammer crushers, B- spirals, the short body grinding machines of C-, D- three-product cyclone classifying screens, E- size mixing equipments,
F- flotation columns.
Embodiment
The embodiment of the present invention is further detailed below in conjunction with the accompanying drawings：
As shown in figure 1, technique is selected in the dissociation of coal again in coking end of the present invention, its step is as follows：
A. coal in end is fed into reversible hammer crusher as raw material to carry out tentatively crushing dissociation, coal particle size in described end
The upper limit is 13mm；Crushed product after preliminary broken dissociation is fed into spiral to be sized mixing, starts spiral point after sizing mixing
Machine is selected to be sorted, the particle size after cracking upper limit is 1mm；
B. two kinds of products of the high ash content tail coal of output and coarse-fine coal after spiral sorting, wherein high ash content tail coal is discharged,
Coarse-fine coal is fed into short body grinding machine and carries out ore grinding, obtains product after coarse-fine coal mill, described short body grinding machine is rod mill or autogenous grinding
Machine；
C. product feeds three-product cyclone classifying screen and carries out graded operation after coarse-fine coal is ground, by three products after graded operation
The overflow of cyclone classification sieve and undersize bulk flotation medicament feed size mixing equipment and sized mixing in advance together, three-product cyclone
Underflow product after classifying screen classification returns to spiral and carries out sorting circulation again；
D. sizing mixing in size mixing equipment being fed into floatation equipment and carries out separation operation, described floatation equipment is flotation column,
Two kinds of products of floatation clean coal and floating tail-coal are finally given, process is selected in the dissociation for completing coal in a coking end again.
Such as Fig. 2, coal 1 in raw material end is fed into reversible hammer crusher A by Belt Conveying etc. first and tentatively crush
Dissociation, its crushed product 2 feeds spiral B after certain operation of sizing mixing after broken, through spiral B's
4 two kinds of high ash content tail coal 3 of output, coarse-fine coal products after sorting, coarse-fine coal 4 through pipeline or chute enter rod mill C (or from
Grinding machine) ore grinding, product 5 flows into or is pumped into three-product cyclone classifying screen D by deadweight and carries out graded operation, three-product cyclone after mill
Classifying screen D overflow 6, undersize 7 and floating agent 9 is sized mixing in advance into size mixing equipment E together, and (agitator, ore pulp prepare
Device or ore pulp preprocessor), three-product cyclone classifying screen D underflow product 8 returns to spiral B and circulated again.After sizing mixing
Ore pulp 10 feeds flotation column F and carries out separation operation, finally gives 12 two kinds of products of cleaned coal 11 and tail coal.
Described above is only the better embodiment to the present invention, not makees any formal limit to the present invention
System, any simple modification, equivalent change and modification that every technical spirit according to the present invention is done to embodiment of above,
Belong in the range of technical solution of the present invention.
Claims (4)
1. technique is selected in the dissociation of coal again in a kind of coking end, it is characterised in that step is as follows：
A. coal in end is fed into reversible hammer crusher as raw material and carries out preliminary broken dissociation, will be broken after preliminary broken dissociation
Broken product feeds spiral and sized mixing, and starts spiral after sizing mixing and is sorted；
B. two kinds of products of the high ash content tail coal of output and coarse-fine coal after spiral sorting, wherein high ash content tail coal is discharged, will be thick
Cleaned coal feeds rod mill or autogenous tumbling mill carries out ore grinding, obtains product after coarse-fine coal mill；
C. product feeds three-product cyclone classifying screen and carries out graded operation after coarse-fine coal is ground, by three-product cyclone after graded operation
The overflow of classifying screen and undersize bulk flotation medicament feed size mixing equipment and sized mixing in advance together, three-product cyclone classification
Underflow product after sieve classification returns to spiral and carries out sorting circulation again；
D. sizing mixing in size mixing equipment is fed into floatation equipment and carries out separation operation, finally give floatation clean coal and floating tail-coal two
Process is selected in kind product, the dissociation for completing coal in a coking end again.
2. technique is selected in the dissociation of coal again in coking end according to claim 1, it is characterised in that：The grain of coal in described end
It is 13mm to spend the upper limit.
3. technique is selected in the dissociation of coal again in coking end according to claim 1, it is characterised in that：It is described preliminary broken
Upper size boundary is 1mm.
4. technique is selected in the dissociation of coal again in coking end according to claim 1, it is characterised in that：Described floatation equipment is
Flotation column.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610165914.2A CN105797831B (en) | 2016-03-22 | 2016-03-22 | Technique is selected in the dissociation of coal again in a kind of coking end |
| AU2016399293A AU2016399293B2 (en) | 2016-03-22 | 2016-12-12 | Process for liberating and separating slack middling obtained from coking |
| RU2018103766A RU2677339C1 (en) | 2016-03-22 | 2016-12-12 | Method of release and enrichment of dust coal, obtained from coking |
| CA2993586A CA2993586C (en) | 2016-03-22 | 2016-12-12 | Process for liberating and separating slack middling obtained from coking |
| PCT/CN2016/109364 WO2017161922A1 (en) | 2016-03-22 | 2016-12-12 | Process for liberating and separating slack middling obtained from coking |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610165914.2A CN105797831B (en) | 2016-03-22 | 2016-03-22 | Technique is selected in the dissociation of coal again in a kind of coking end |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105797831A CN105797831A (en) | 2016-07-27 |
| CN105797831B true CN105797831B (en) | 2018-03-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610165914.2A Active CN105797831B (en) | 2016-03-22 | 2016-03-22 | Technique is selected in the dissociation of coal again in a kind of coking end |
Country Status (5)
| Country | Link |
|---|---|
| CN (1) | CN105797831B (en) |
| AU (1) | AU2016399293B2 (en) |
| CA (1) | CA2993586C (en) |
| RU (1) | RU2677339C1 (en) |
| WO (1) | WO2017161922A1 (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105797831B (en) * | 2016-03-22 | 2018-03-09 | 中国矿业大学 | Technique is selected in the dissociation of coal again in a kind of coking end |
| CN109967202A (en) * | 2017-12-28 | 2019-07-05 | 兖矿科技有限公司 | Coal dry classification upgrading integral system and its processing method |
| CN108686830A (en) * | 2018-04-13 | 2018-10-23 | 汤仁良 | It is not easy coal separation using physical method dissociation grinding, improves its washability, the technique for improving resource utilization |
| CN108745623B (en) * | 2018-05-28 | 2020-07-17 | 湖南兴辉洗选药剂科技开发有限公司 | System and method for sorting coke-fat coal slime |
| CN110201790B (en) * | 2019-06-21 | 2020-06-16 | 中国矿业大学 | Sorting and recycling system and sorting and recycling process for wide-size coal slime |
| CN112156885B (en) * | 2020-08-17 | 2021-11-30 | 中国矿业大学 | Process for recycling coarse slime in qualified medium |
| CN112871406A (en) * | 2021-01-12 | 2021-06-01 | 黑龙江龙煤双鸭山矿业有限责任公司 | Deep screening and crushing process for raw coal system |
| CN114950710B (en) * | 2022-05-11 | 2023-07-18 | 中国矿业大学 | Full-size-fraction sorting pre-enrichment system and process for coal-series co-associated mineral gallium and lithium |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3908912A (en) * | 1974-09-17 | 1975-09-30 | Bethlehem Steel Corp | Coal beneficiating process |
| US4505435A (en) * | 1983-05-16 | 1985-03-19 | Combustion Engineering, Inc. | Apparatus for removal of troublesome mineral matter from pulverized coal |
| RU2043159C1 (en) * | 1993-10-06 | 1995-09-10 | Научно-производственное объединение "Гидротрубопровод" | Method of fine selective grinding of porous materials |
| JP2007054773A (en) * | 2005-08-26 | 2007-03-08 | Mitsui Eng & Shipbuild Co Ltd | Unburned carbon removal method in coal ash |
| CN102861663B (en) * | 2012-10-08 | 2013-10-30 | 中国矿业大学 | Breaking grinding dissociation and re-flotation two-stage recovery process of coal in scarce coking |
| CN103143432B (en) * | 2013-02-28 | 2014-07-16 | 中国矿业大学 | Efficient crushing and three-section type screening method of coking coal gravity middings |
| CN103386355B (en) * | 2013-07-23 | 2015-10-14 | 侯英 | A kind of high pressure roller selective molecular attraction of middle coal and method for separating |
| CN103623932B (en) * | 2013-11-20 | 2016-01-20 | 辽宁科技大学 | A kind of whole grinding of high pressure roller of middle coal and method for separating |
| CN103831164B (en) * | 2014-02-24 | 2016-10-05 | 太原理工大学 | In a kind of coking, coal heavily floats combined sorting technique |
| CN103920582B (en) * | 2014-04-29 | 2016-01-20 | 河南理工大学 | A kind of closed circuit grading technology being applicable to Bed for Fine Coal classification |
| CN104722390B (en) * | 2015-03-02 | 2019-01-04 | 中国矿业大学 | Coal floats combined sorting technique again in a kind of coking |
| CN105728155B (en) * | 2016-03-22 | 2018-01-16 | 中国矿业大学 | Technique is selected in the dissociation of coal again in a kind of coking |
| CN105797831B (en) * | 2016-03-22 | 2018-03-09 | 中国矿业大学 | Technique is selected in the dissociation of coal again in a kind of coking end |
-
2016
- 2016-03-22 CN CN201610165914.2A patent/CN105797831B/en active Active
- 2016-12-12 CA CA2993586A patent/CA2993586C/en active Active
- 2016-12-12 WO PCT/CN2016/109364 patent/WO2017161922A1/en active Application Filing
- 2016-12-12 RU RU2018103766A patent/RU2677339C1/en active
- 2016-12-12 AU AU2016399293A patent/AU2016399293B2/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| AU2016399293A1 (en) | 2018-02-15 |
| WO2017161922A1 (en) | 2017-09-28 |
| RU2677339C1 (en) | 2019-01-16 |
| CA2993586A1 (en) | 2017-09-28 |
| AU2016399293B2 (en) | 2019-04-18 |
| CN105797831A (en) | 2016-07-27 |
| CA2993586C (en) | 2019-12-31 |
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