CN104437831A - Gravity separation middling coal separation technology - Google Patents
Gravity separation middling coal separation technology Download PDFInfo
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- CN104437831A CN104437831A CN201410613862.1A CN201410613862A CN104437831A CN 104437831 A CN104437831 A CN 104437831A CN 201410613862 A CN201410613862 A CN 201410613862A CN 104437831 A CN104437831 A CN 104437831A
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- coal
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B7/00—Combinations of wet processes or apparatus with other processes or apparatus, e.g. for dressing ores or garbage
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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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- Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
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Abstract
The invention belongs to a coal washing method and discloses a gravity separation middling coal separation technology. Gravity separation middling coal is fed into rough grinding equipment. Products obtained after rough grinding is fed into screening equipment for primary classifying, and primary plus-sieve products and primary minus-sieve products are obtained. The primary plus-sieve products are fed into a dense medium cyclone for separation. The primary minus-sieve products are fed into separation equipment for secondary classification, and secondary plus-sieve products and secondary minus-sieve products are obtained. The secondary plus-sieve products are fed into fine grinding equipment for fine grinding. Products obtained after fine grinding and the secondary minus-sieve products are fed into size mixing equipment together for completing flotation. Two-time ore grinding, gravity separation and floatation combination and classifying separation are combined to separate gravity separation middling coal, under the premise that the middling coal dissociation degree is improved, the phenomena of over crushing are reduced, equipment separation efficiency is obviously improved, clean coal in the middling coal is recycled to the maximum degree, the coal preparation plant clean coal productivity is increased, and enterprise economical benefit is improved.
Description
Technical field
The present invention relates to a kind of sorting process of coal, be especially a kind ofly applicable to coal sorting process in the gravity treatment in coal washing field.
Background technology
Along with the fast development of dense-medium separation technology, dense medium sorting technology is widely applied at Oversized Coking Coal Cleaning Plant, and middle coal is as the byproduct produced in dense medium assorting room, its ash content, generally close to coal ash, belongs to the pole difficult separation coal charcoal resource of intermediate density, washability difference.At present, in such, coal resource is mainly direct slatterns as civilian and Power Plant Fuel, and then causes the significant wastage of the rare coking coal resource of China.In gravity treatment in coal except a small amount of low-density cleaned coal infiltrated due to sorting error, generally can be considered it is the intergrowth of cleaned coal and spoil, want therefrom as much as possiblely in coal to sub-elect cleaned coal, first must carry out fragmentation by centering coal, coal and spoil are fully dissociated, but be not broken must be more thin better.Because granularity is thinner, more difficult sorting, cost is also higher.A kind of middle coal fragmentation that patent announcement number the is CN103721840A TBS master that dissociates selects technique and patent announcement number all to take into account centering coal and carry out improving clean coal yield by sorting after fragmentation is dissociated for the dense medium cyclone main separation black water secondary flotation technique of dissociating of coal fragmentation in the one of CN103894277A again, but be only adopt the disintegrating apparatus of coal washing field routine and traditional sorting process centering coal to carry out fragmentation and sorting, and reckon without the efficiency of separation problem crossing pulverizing problem and equipment in the broken dissociation process of middle coal.Therefore, develop new middle coal sorting process, the mistake crushing phenomenon in being reduced by process innovation in coal dissociation process, improve the equipment efficiency of separation, the cleaned coal in reclaiming to greatest extent in coal is the key point of jet refinement efficient separation in realizing.
Summary of the invention
Technical problem: the object of the invention is the deficiency overcoming prior art, provide a kind of technique simple, cut the waste, the efficiency of separation is high, coal sorting process in the gravity treatment of increasing economic efficiency.
Technical scheme: coal sorting process in gravity treatment of the present invention, feeds corase grind equipment by coal in gravity treatment; Corase grind afterproduct is fed screening plant and carries out scalping, once sieved product and a undersized product; Once will sieve product and feed heavy medium cyclone sorting; A undersized product is fed screening plant and carries out secondary grading, obtain the upper product of secondary sieve and secondary undersized product; Upper for secondary sieve product is fed fine grinding equipment again and carries out fine grinding; Fine grinding afterproduct and secondary undersized product feed size mixing equipment in the lump and complete flotation operation.
Described corase grind equipment is autogenous tumbling mill or rod mill.
Described fine grinding equipment is Ball-stirring mill or ball mill.
The described screen-aperture carrying out the screening plant of scalping is 1.25mm, and the screen-aperture carrying out the screening plant of secondary grading is 0.25mm.
Beneficial effect: coking coal resource has become the rare coal resources of China.The method counterweight that the present invention adopts twice ore grinding, heavily floating associating and classification and sorting to combine chooses coal to carry out sorting, can in raising coal degree of dissociation prerequisite under reduce over crushing phenomenon, significantly improve the equipment efficiency of separation, cleaned coal in reclaiming to greatest extent in coal, increase coal preparation plant's clean coal yield, improve Business Economic Benefit.At present, China enters to wash about 2.5 hundred million tons of coking coals every year, calculate about 30% by middle coal average yield, then to have an appointment every year the middle coal of 8,000 ten thousand tons, utilize coal sorting process in gravity treatment of the present invention to carry out sorting to it, can therefrom sub-elect in coal productive rate about 25% cleaned coal, then annual will the coking coal cleans of newly-increased about 2,000 ten thousand tons, not only remarkable in economical benefits, and the demand of China to rare coal resources can be alleviated.
Accompanying drawing explanation
Fig. 1 is process flow diagram of the present invention.
Fig. 2 is process flow system figure of the present invention.
In figure: coal in 1-gravity treatment, 2-roughly grinds afterproduct, 3-once sieves product, 4-undersized product, 5-gravity treatment cleaned coal, 6-gravity treatment tail coal, the upper product of 7-bis-sieves, 8-bis-undersized products, 9-fine grinding afterproduct, 10-floating agent, ore pulp after 11-sizes mixing, 12-floatation clean coal, 13-floating tail-coal, corase grind equipment-A, screening plant-B, gravity treatment feed buffer barrel-C, gravity treatment feed pump-D, heavy medium cyclone-E, screening plant-F, fine grinding equipment-G, floating and feeding Buffer Pool-H, floating and feeding pump-I, size mixing equipment-J, floatation equipment-K.
Detailed description of the invention
Below in conjunction with accompanying drawing, one embodiment of the present of invention are further described:
As shown in Figure 1, coal in gravity treatment is fed corase grind equipment; Described corase grind equipment is autogenous tumbling mill or rod mill.Product after corase grind is fed screening plant and carries out scalping, once sieved product and a undersized product; Once will sieve product and feed heavy medium cyclone sorting; A undersized product is fed screening plant and carries out secondary grading, obtain the upper product of secondary sieve and secondary undersized product; Upper for secondary sieve product is fed fine grinding equipment again and carries out fine grinding; Described thin grinding attachment is Ball-stirring mill or ball mill.Product after fine grinding and secondary undersized product feed size mixing equipment in the lump and complete flotation operation.The described screen-aperture carrying out the screening plant of scalping is 1.25mm, and the screen-aperture carrying out the screening plant of secondary grading is 0.25mm.
During work, in gravity treatment, coal feeds in corase grind equipment through passage gravity flow; It is that the screening plant of 1.25mm carries out scalping that corase grind afterproduct feeds screen-aperture through passage gravity flow, is once sieved product and a undersized product; Once the upper product of sieve is through heavy medium cyclone sorting, obtains dense medium cleaned coal and dense medium tail coal; It is that the screening plant of 0.25mm carries out secondary grading that undersized product feeds screen-aperture through passage gravity flow, obtains the upper product of secondary sieve and secondary undersized product; The upper product gravity flow of secondary sieve feeds fine grinding equipment, obtains fine grinding afterproduct; Fine grinding afterproduct and secondary undersized product feed size mixing equipment in the lump, add floating agent to size mixing equipment by existing routine techniques, and being flow automatically by passage after sizing mixing feeds floatation equipment flotation, obtains floatation clean coal and floating tail-coal.
Shown in Fig. 2, comprise and adopt corase grind device A, screening plant B, gravity treatment feed buffer barrel C, gravity treatment feed pump D, heavy medium cyclone E, screening plant F, fine grinding equipment G, floating and feeding Buffer Pool H, floating and feeding pump I, size mixing equipment J, floatation equipment K.Coal in gravity treatment 1 is fed corase grind device A through passage gravity flow; Corase grind afterproduct 2 feeds screening plant B and carries out scalping, is once sieved product 3 and a undersized product 4; Once the upper product 3 of sieve feeds gravity treatment feed buffer barrel C through passage gravity flow, feeds heavy medium cyclone E sorting, obtain dense medium cleaned coal 5 and dense medium tail coal 6 through gravity treatment feed pump D; A undersized product 4 feeds screening plant F through passage gravity flow and carries out secondary grading, obtains the upper product 7 of secondary sieve and secondary undersized product 8; The upper product 7 of secondary sieve feeds fine grinding equipment G through passage gravity flow, obtains fine grinding afterproduct 9; Fine grinding afterproduct 9 and secondary undersized product 8 feed floating and feeding Buffer Pool H through passage gravity flow in the lump, size mixing equipment J is fed through floating and feeding pump I, add floating agent 10 to size mixing equipment J to size mixing, after sizing mixing, ore pulp 11 feeds floatation equipment K flotation through passage gravity flow, obtains floatation clean coal 12 and floating tail-coal 13.Corase grind device A is autogenous tumbling mill or rod mill, is autogenous tumbling mill shown in accompanying drawing 2; Fine grinding equipment G is Ball-stirring mill or ball mill, is Ball-stirring mill shown in accompanying drawing 2.
Claims (4)
1. a coal sorting process in gravity treatment, is characterized in that: coal in gravity treatment is fed corase grind equipment; Corase grind afterproduct is fed screening plant and carries out scalping, once sieved product and a undersized product; Once will sieve product and feed heavy medium cyclone sorting; A undersized product is fed screening plant and carries out secondary grading, obtain the upper product of secondary sieve and secondary undersized product; Upper for secondary sieve product is fed fine grinding equipment again and carries out fine grinding; Fine grinding afterproduct and secondary undersized product feed size mixing equipment in the lump and complete flotation operation.
2. according to coal sorting process in a kind of gravity treatment according to claim 1, it is characterized in that: described corase grind equipment is autogenous tumbling mill or rod mill.
3. according to coal sorting process in a kind of gravity treatment according to claim 1, it is characterized in that: described thin grinding attachment is Ball-stirring mill or ball mill.
4., according to coal sorting process in a kind of gravity treatment according to claim 1, it is characterized in that: described in carry out the screening plant of scalping screen-aperture be 1.25mm, the screen-aperture carrying out the screening plant of secondary grading is 0.25mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410613862.1A CN104437831A (en) | 2014-11-03 | 2014-11-03 | Gravity separation middling coal separation technology |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410613862.1A CN104437831A (en) | 2014-11-03 | 2014-11-03 | Gravity separation middling coal separation technology |
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| CN104437831A true CN104437831A (en) | 2015-03-25 |
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| CN201410613862.1A Pending CN104437831A (en) | 2014-11-03 | 2014-11-03 | Gravity separation middling coal separation technology |
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104722390A (en) * | 2015-03-02 | 2015-06-24 | 中国矿业大学 | Coking middling coal dms-flotation combined separation process |
| CN104815748A (en) * | 2015-04-26 | 2015-08-05 | 中国矿业大学 | Two-stage crushing and grinding flotation technology for coking medium coal |
| CN104826727A (en) * | 2015-04-27 | 2015-08-12 | 中国矿业大学 | Fine-grained medium coal multistage grinding floating technology and system |
| CN105728156A (en) * | 2016-03-22 | 2016-07-06 | 中国矿业大学 | Preparation technology of super pure coal |
| CN105728180A (en) * | 2016-03-22 | 2016-07-06 | 中国矿业大学 | Treating recycling technology of low-ash coking floatation tailings |
| CN106669960A (en) * | 2016-06-20 | 2017-05-17 | 中国矿业大学 | Dissociation and recleaning technology for coking fine grain middling coal |
| CN106669961A (en) * | 2016-06-20 | 2017-05-17 | 中国矿业大学 | Process for recycling fine coal from middlings |
| CN107321472A (en) * | 2017-07-06 | 2017-11-07 | 中国矿业大学(北京) | A kind of crystalline flake graphite method for separating based on pneumatic separation and flotation |
| 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 |
| CN109092545A (en) * | 2018-07-20 | 2018-12-28 | 太原理工大学 | A kind of heavy floating combined sorting device and method |
| 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 |
| CN111530646A (en) * | 2020-04-23 | 2020-08-14 | 中国矿业大学 | Severe oxidized coal flotation system and flotation method |
| CN112237984A (en) * | 2020-09-27 | 2021-01-19 | 中国平煤神马能源化工集团有限责任公司天成实业分公司 | Medium coal physical crushing dissociation re-washing process |
| US10906048B1 (en) * | 2019-07-18 | 2021-02-02 | Taiyuan University Of Technology | Process for macroscopically separating maceral concentrate from raw coal |
| CN112916197A (en) * | 2021-01-28 | 2021-06-08 | 内蒙古金陶股份有限公司 | Pretreatment method before ore processing |
| CN113262874A (en) * | 2021-05-12 | 2021-08-17 | 乌海市广源洗煤有限责任公司 | Coal re-extraction process in coking coal |
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2014
- 2014-11-03 CN CN201410613862.1A patent/CN104437831A/en active Pending
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Cited By (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104722390A (en) * | 2015-03-02 | 2015-06-24 | 中国矿业大学 | Coking middling coal dms-flotation combined separation process |
| CN104815748A (en) * | 2015-04-26 | 2015-08-05 | 中国矿业大学 | Two-stage crushing and grinding flotation technology for coking medium coal |
| CN104815748B (en) * | 2015-04-26 | 2017-06-20 | 中国矿业大学 | The broken mill floatation process of two sections of coal in a kind of coking |
| CN104826727A (en) * | 2015-04-27 | 2015-08-12 | 中国矿业大学 | Fine-grained medium coal multistage grinding floating technology and system |
| CN105728156A (en) * | 2016-03-22 | 2016-07-06 | 中国矿业大学 | Preparation technology of super pure coal |
| CN105728180A (en) * | 2016-03-22 | 2016-07-06 | 中国矿业大学 | Treating recycling technology of low-ash coking floatation tailings |
| CN105728180B (en) * | 2016-03-22 | 2018-01-09 | 中国矿业大学 | A kind of processing recovery process of low grey coking floating tail-coal |
| CN106669960B (en) * | 2016-06-20 | 2019-02-22 | 中国矿业大学 | Technique is selected in the dissociation of coal again in a kind of coking particulate |
| CN106669960A (en) * | 2016-06-20 | 2017-05-17 | 中国矿业大学 | Dissociation and recleaning technology for coking fine grain middling coal |
| CN106669961A (en) * | 2016-06-20 | 2017-05-17 | 中国矿业大学 | Process for recycling fine coal from middlings |
| CN107321472A (en) * | 2017-07-06 | 2017-11-07 | 中国矿业大学(北京) | A kind of crystalline flake graphite method for separating based on pneumatic separation and flotation |
| 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 |
| CN109092545A (en) * | 2018-07-20 | 2018-12-28 | 太原理工大学 | A kind of heavy floating combined sorting device and method |
| US10906048B1 (en) * | 2019-07-18 | 2021-02-02 | Taiyuan University Of Technology | Process for macroscopically separating maceral concentrate from raw coal |
| CN111530646A (en) * | 2020-04-23 | 2020-08-14 | 中国矿业大学 | Severe oxidized coal flotation system and flotation method |
| CN111530646B (en) * | 2020-04-23 | 2022-06-17 | 中国矿业大学 | Severe oxidized coal flotation system and flotation method |
| CN112237984A (en) * | 2020-09-27 | 2021-01-19 | 中国平煤神马能源化工集团有限责任公司天成实业分公司 | Medium coal physical crushing dissociation re-washing process |
| CN112916197A (en) * | 2021-01-28 | 2021-06-08 | 内蒙古金陶股份有限公司 | Pretreatment method before ore processing |
| CN113262874A (en) * | 2021-05-12 | 2021-08-17 | 乌海市广源洗煤有限责任公司 | Coal re-extraction process in coking coal |
| CN113262874B (en) * | 2021-05-12 | 2022-02-08 | 乌海市广源洗煤有限责任公司 | Coal re-extraction process in coking coal |
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Application publication date: 20150325 |