CN105797831A - Dissociation and reselection process for coal in coking breeze - Google Patents
Dissociation and reselection process for coal in coking breeze Download PDFInfo
- Publication number
- CN105797831A CN105797831A CN201610165914.2A CN201610165914A CN105797831A CN 105797831 A CN105797831 A CN 105797831A CN 201610165914 A CN201610165914 A CN 201610165914A CN 105797831 A CN105797831 A CN 105797831A
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- Prior art keywords
- coal
- dissociating
- spiral
- product
- coking
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Classifications
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- 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
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- 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
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- 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
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- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Disintegrating Or Milling (AREA)
- Combined Means For Separation Of Solids (AREA)
- Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
- Crushing And Grinding (AREA)
Abstract
The invention discloses a dissociation and reselection process for coal in coking breeze with a high ash content and difficult to select, and belongs to the field of coal washing selection. The dissociation and reselection process comprises the following steps: feeding coal in raw material breeze into crushing equipment and crushing, feeding the crushed products into a spiral separation machine and separating, so as to remove a part of high-density materials in the charged materials, feeding low-density materials into a short-body grinding machine, feeding the grinded products into a three-product spiral classification screen and classifying, feeding the overflow and undersized materials of the classification screen into a flotation system, and returning an underflow to a spiral separation machine and carrying out separation and dissociation again. The dissociation and reselection process has a high separation density, and entrance of high-ash particles in the grinding machine is avoided due to spiral tailing discarding, thus the load of the grinding machine is reduced, and the pollution of crushing for the high-ash particles to clean coal is avoided.
Description
Technical field
The present invention relates to one to dissociate and select technique again, being particularly suited for reclaiming in the coking end that rare coking coal resource uses dissociating of coal selects technique again.
Background technology
The broken practical technique selected again that the present invention is based in coking end coal, main purpose is to reclaim rare coking coal resource.
Along with improving constantly of China's mechanical coal mining degree, the continuing of Resource geology condition worsens and heavy media coal separation technology is in the extensive use of coal preparation plant, the selected ature of coal of China is constantly deteriorated, the fine-graded coal slime ratio produced in assorting room sharply increases, coal presents " lean gradually, carefully, assorted " feature, and in continuing the trend of deterioration, the content that its outstanding behaviours is middle coal is big, ash is high and floatability is poor, the outstanding problem that in this part, coal faces in assorting room is exactly that cleans ash exceeds standard and tail coal ash is on the low side, in fine fraction coal slime processing procedure, problem encountered brings great challenge to the high efficiency separation of coal resources and purifying utilization.
Flotation, selective flocculation and oil aggregation etc. are traditional technological means of graded shot level coal slime, but only have flotation technology the most ripe and industrialization on a large scale.Flotation technology has good sorting generally for the coal slime of-0.5mm grade, but middle coal has its unique character, it is the middle intergrowth that in raw coal forming process, low ash particle and high ash particle are formed with the less mutual embedding cloth of granularity, and ash and former pit ash are closer to.If being directly entered flotation, if coal enters cleaned coal in this part in floatation process, cleaned coal can be constituted and pollute and enter tail coal and then make tail coal ash on the low side, so not dissociating, recovering effect is necessarily affected, the technique selected again and centering coal carries out dissociating, such as primary grinding floatation process, then to there is spoil overground, after mill, flotation of material cleans ash such as exceeds standard at some problems, so how middle coal dissociates, how to sort is a problem being worth thinking, the practical technique of the low ash cleaned coal developed in the high efficiente callback of a kind of energy in coal seems very necessary, the progress of particulate difficult separation coal mud sorting technology is not only had huge facilitation by this, and rare coking coal resource secondary recovery is utilized there is great economic worth.
Summary of the invention
Weak point for above-mentioned technology, there is provided a kind of and select technique again based on what middle coal dissociated, overcome the deficiency of the technology reclaiming low ash extract coal in traditional therefrom coal, fundamentally solve existing rare coking coal resource and technique cannot be selected again at dissociating of coal in the coking end of recycling.
For realizing above-mentioned technical purpose, in coking end of the present invention, dissociating of coal selects technique again, and its step is as follows:
A. coal in end is fed reversible hammer crusher as raw material and carry out tentatively broken dissociating, the crushed product after tentatively broken dissociating is fed spiral and sizes mixing, start spiral after sizing mixing and sort；
B. output height ash tail coal and two kinds of products of coarse-fine coal after spiral sorting, wherein high ash tail coal is discharged, and coarse-fine coal feeds short body grinding machine and carries out ore grinding, obtains product after coarse-fine coal grinds；
C. product after coarse-fine coal mill is fed three-product cyclone classifying screen and carry out graded operation, after graded operation, together with undersize bulk flotation medicament, the overflow of three-product cyclone classifying screen being fed size mixing equipment to size mixing in advance, the underflow product after three-product cyclone classifying screen classification returns spiral and again carries out sorting circulation；
D. sizing mixing in size mixing equipment is fed floatation equipment and carry out separation operation, finally give floatation clean coal and two kinds of products of floating tail-coal, complete dissociating of coal in a coking end and select process again.
In described end, the coal particle size upper limit is 13mm；The described particle size after cracking upper limit is 1mm；Described short body grinding machine is rod mill or autogenous tumbling mill；Described floatation equipment is flotation column.
Beneficial effect: propose and crush the sorting process of coal in a kind of coking end dissociated based on middle coal, achieve the efficient recovery to rare coking coal resource: a, spiral separating density are higher, can throw in advance under its best separating density except a part is through the broken high ash material dissociateed, avoid the high ash material dissociateed and enter grinding machine, both the load of grinding machine had been significantly reduced, reduce energy consumption, turn avoid the pollution to follow-up flotation operation after high ash material grinds；During b, short body grinding machine both ensure that, low-ash material fully dissociated, be unlikely to again to produce to be unfavorable for the overground phenomenon of follow-up flotation operation；C, three-product cyclone classifying screen have higher classification efficiency, play on stream and product after mill is carried out the effect of classification, and its overflow and siftage fully enter floatation system, and underflow returns spiral and again throws tail.It controls the material size entering floatation system on the one hand so that the thinner material fully dissociated enters flotation operation, it is prevented that it constantly circulates in systems；Ensure that the coarse granule fully dissociated returns spiral and continues to throw tail, dissociate on the other hand, in order to avoid entering floatation system；The sorting process flow process that d, the present invention propose is simple, technology maturation, small investment, operating cost are low, remarkable in economical benefits.
Accompanying drawing explanation
Fig. 1 is that in coking end of the present invention, dissociating of coal selects the FB(flow block) of technique again.
Fig. 2 is that in coking end of the present invention, dissociating of coal selects the equipment contact figure of technique again,
In figure: coal in 1-raw material end, 2-crushed product, 3-spiral tail coal, the coarse-fine coal of 4-, product after 5-mill, 6-Grading Overflow, 7-classification siftage, 8-classification underflow, 9-floating agent, 10-size mixing after ore pulp, 11-floatation clean coal, 12-floating tail-coal, A-reversible hammer crusher, B-spiral, the short body grinding machine of C-, D-three-product cyclone classifying screen, E-size mixing equipment, F-flotation column.
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is further detailed:
As it is shown in figure 1, dissociating of coal selects technique again in coking end of the present invention, its step is as follows:
A. as raw material, coal in end being fed reversible hammer crusher and carry out tentatively broken dissociating, in described end, the coal particle size upper limit is 13mm；Crushed product after tentatively broken dissociating being fed spiral size mixing, start spiral and sort after sizing mixing, the described particle size after cracking upper limit is 1mm；
B. output height ash tail coal and two kinds of products of coarse-fine coal after spiral sorting, wherein high ash tail coal is discharged, and coarse-fine coal feeds short body grinding machine and carries out ore grinding, obtains product after coarse-fine coal grinds, and described short body grinding machine is rod mill or autogenous tumbling mill；
C. product after coarse-fine coal mill is fed three-product cyclone classifying screen and carry out graded operation, after graded operation, together with undersize bulk flotation medicament, the overflow of three-product cyclone classifying screen being fed size mixing equipment to size mixing in advance, the underflow product after three-product cyclone classifying screen classification returns spiral and again carries out sorting circulation；
D., sizing mixing in size mixing equipment feeding floatation equipment and carries out separation operation, described floatation equipment is flotation column, finally gives floatation clean coal and two kinds of products of floating tail-coal, completes dissociating of coal in a coking end and selects process again.
Such as Fig. 2, first coal in raw material end 1 is fed reversible hammer crusher A by Belt Conveying etc. and carry out tentatively broken dissociating, after crushing, its crushed product 2 feeds spiral B after certain operation of sizing mixing, output height ash tail coal 3 after the sorting of spiral B, 4 two kinds of products of coarse-fine coal, coarse-fine coal 4 enters rod mill C (or autogenous tumbling mill) ore grinding through pipeline or chute, after mill, product 5 flows into by deadweight or pumps into three-product cyclone classifying screen D and carries out graded operation, the overflow 6 of three-product cyclone classifying screen D, undersize 7 enters size mixing equipment E together with floating agent 9 and sizes mixing in advance (agitator, kaskad apparatus for pre-flotation pulp conditioning or ore pulp preprocessor), the underflow product 8 of three-product cyclone classifying screen D returns spiral B and again circulates.After sizing mixing, ore pulp 10 feeds flotation column F and carries out separation operation, finally gives cleaned coal 11 and 12 two kinds of products of tail coal.
The above is only the better embodiment to the present invention, not the present invention is done any pro forma restriction, every any simple modification, equivalent variations and modification embodiment of above done according to the technical spirit of the present invention, belongs in the scope of technical solution of the present invention.
Claims (5)
1. in a coking end, dissociating of coal selects technique again, it is characterised in that step is as follows:
A. coal in end is fed reversible hammer crusher as raw material and carry out tentatively broken dissociating, the crushed product after tentatively broken dissociating is fed spiral and sizes mixing, start spiral after sizing mixing and sort；
B. output height ash tail coal and two kinds of products of coarse-fine coal after spiral sorting, wherein high ash tail coal is discharged, and coarse-fine coal feeds short body grinding machine and carries out ore grinding, obtains product after coarse-fine coal grinds；
C. product after coarse-fine coal mill is fed three-product cyclone classifying screen and carry out graded operation, after graded operation, together with undersize bulk flotation medicament, the overflow of three-product cyclone classifying screen being fed size mixing equipment to size mixing in advance, the underflow product after three-product cyclone classifying screen classification returns spiral and again carries out sorting circulation；
D. sizing mixing in size mixing equipment is fed floatation equipment and carry out separation operation, finally give floatation clean coal and two kinds of products of floating tail-coal, complete dissociating of coal in a coking end and select process again.
2. in coking end according to claim 1, dissociating of coal selects technique again, it is characterised in that: in described end, the coal particle size upper limit is 13mm.
3. in coking end according to claim 1, dissociating of coal selects technique again, it is characterised in that: the described particle size after cracking upper limit is 1mm.
4. in coking end according to claim 1, dissociating of coal selects technique again, it is characterised in that: described short body grinding machine is rod mill or autogenous tumbling mill.
5. in coking end according to claim 1, dissociating of coal selects technique again, 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 |
| RU2018103766A RU2677339C1 (en) | 2016-03-22 | 2016-12-12 | Method of release and enrichment of dust coal, obtained from coking |
| AU2016399293A AU2016399293B2 (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 |
| CA2993586A CA2993586C (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 true CN105797831A (en) | 2016-07-27 |
| CN105797831B CN105797831B (en) | 2018-03-09 |
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Family Applications (1)
| 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) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017161922A1 (en) * | 2016-03-22 | 2017-09-28 | 中国矿业大学 | Process for liberating and separating slack middling obtained from coking |
| 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 |
| CN108745623A (en) * | 2018-05-28 | 2018-11-06 | 湖南兴辉洗选药剂科技开发有限公司 | A kind of coke rich coal slime separation system and method for separating |
| 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 |
| CN110201790A (en) * | 2019-06-21 | 2019-09-06 | 中国矿业大学 | A kind of the sorting recovery system and sorting recovery process of width grade coal slime |
| CN114950710A (en) * | 2022-05-11 | 2022-08-30 | 中国矿业大学 | Whole particle fraction separation and pre-enrichment system and process for coal-series co-associated mineral gallium and lithium |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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| 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 RU RU2018103766A patent/RU2677339C1/en active
- 2016-12-12 AU AU2016399293A patent/AU2016399293B2/en active Active
- 2016-12-12 WO PCT/CN2016/109364 patent/WO2017161922A1/en active Application Filing
- 2016-12-12 CA CA2993586A patent/CA2993586C/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US3908912A (en) * | 1974-09-17 | 1975-09-30 | Bethlehem Steel Corp | Coal beneficiating process |
| JP2007054773A (en) * | 2005-08-26 | 2007-03-08 | Mitsui Eng & Shipbuild Co Ltd | Unburned carbon removal method in coal ash |
| CN102861663A (en) * | 2012-10-08 | 2013-01-09 | 中国矿业大学 | Breaking grinding dissociation and re-flotation two-stage recovery process of coal in scarce coking |
| CN103143432A (en) * | 2013-02-28 | 2013-06-12 | 中国矿业大学 | Efficient crushing and three-section type screening method of coking coal gravity middings |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2017161922A1 (en) * | 2016-03-22 | 2017-09-28 | 中国矿业大学 | Process for liberating and separating slack middling obtained from coking |
| 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 |
| CN108745623A (en) * | 2018-05-28 | 2018-11-06 | 湖南兴辉洗选药剂科技开发有限公司 | A kind of coke rich coal slime separation system and method for separating |
| 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 |
| CN110201790A (en) * | 2019-06-21 | 2019-09-06 | 中国矿业大学 | A kind of the sorting recovery system and sorting recovery process of width grade coal slime |
| WO2020252960A1 (en) * | 2019-06-21 | 2020-12-24 | 中国矿业大学 | Sorting and recycling system and sorting and recycling process for coarse-grained coal slurry |
| CN114950710A (en) * | 2022-05-11 | 2022-08-30 | 中国矿业大学 | Whole particle fraction separation and pre-enrichment system and process for coal-series co-associated mineral gallium and lithium |
Also Published As
| Publication number | Publication date |
|---|---|
| AU2016399293A1 (en) | 2018-02-15 |
| CA2993586A1 (en) | 2017-09-28 |
| CA2993586C (en) | 2019-12-31 |
| RU2677339C1 (en) | 2019-01-16 |
| CN105797831B (en) | 2018-03-09 |
| AU2016399293B2 (en) | 2019-04-18 |
| WO2017161922A1 (en) | 2017-09-28 |
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