CN102430480A - Coarse clean coal regrinding recleaning separation technique - Google Patents
Coarse clean coal regrinding recleaning separation technique Download PDFInfo
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- CN102430480A CN102430480A CN2011103175945A CN201110317594A CN102430480A CN 102430480 A CN102430480 A CN 102430480A CN 2011103175945 A CN2011103175945 A CN 2011103175945A CN 201110317594 A CN201110317594 A CN 201110317594A CN 102430480 A CN102430480 A CN 102430480A
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Abstract
The invention discloses a coarse clean coal regrinding recleaning separation technique, comprising the following steps of: firstly taking a floating agent and coal floatation into a stirring barrel; stirring, pulping, and automatically flowing to a roughing floatation column or a floatation machine; obtaining floated coarse clean coal and roughing floatation tailing coal after roughing floatation through the floatation column or the floatation machine; taking the floated coarse clean coal into a precipitation filter type centrifugal dehydrator to carry out dehydration operation so as to obtain coarse clean coal products and clean coal filter liquor; directly taking the clean coal filter liquor into the clean floatation column or the floatation machine to carry out cleaning operation; taking the coarse clean coal into a ball grinder to carry out ore grinding operation; and taking the grinded coarse clean coal products to the clean floatation column or the floatation machine to carry out cleaning operation so as to obtain final clean coal and cleaned tailing coal. According to different coal quality conditions, the cleaned tailing coal can be used as final tailing coal, or returned to an ore pulp preparation operation for re-separation, therefore the recovery rate of the floatation clean coal is improved. The coarse clean coal regrinding recleaning separation technique has the advantages of simple technique, less investment, low power consumption, low operation cost, high separation efficiency and obvious economic benefits.
Description
Technical field
The present invention relates to slime separation technology, especially a kind ofly be applicable to selected once more sorting process after roughly selecting the cleaned coal fine grinding dissociates.
Background technology
Coal is the main energy sources of China, accounts for about 70% of primary energy, and in the period of quite growing future, the principal status of public economy of coal in China's energy resource structure can not change.Along with raising, resource deterioration of geological conditions, coal preparation plant's maximization of Mechanized Coal Mining Operation in China degree are built and the dense medium separation broad application; High grey difficult separation coal mud ratio sharply increases; And present the continuation degradating trend, make the contradiction of slime separation more outstanding.The characteristics of high grey difficult separation coal mud show mainly that coal content is big in the coal slime, ash content is high, fine size, floatability difference several respects.Wherein particularly-200 the fine coal content of purpose increases, and the coarse granule intergrowth makes the floatation clean coal ash content constantly raise (13%～15%) to the pollution of cleaned coal, has become the key factor of the final head coal product quality of serious restriction.Meanwhile; Continuous minimizing along with coal reserves; As non-renewable resources, the appearance of high grey difficult separation coal mud makes slime separation be faced with new challenges, and it is more and more obvious to expose the low defective of the rate of recovery and production efficiency in the slime separation process; Seriously restrict final head coal product quality, become a key factor of restriction coal resources utilization rate and coal high-efficiency clean utilization.A kind of slime separation technology of patent (publication number: CN101757982A) consider of the influence of intergrowth mineral to flotation recovery rate; Taked the dissociate technology of flotation again of intergrowth ore grinding; But this can improve clean coal recovery, and on the other hand, the thin cement content of the product after levigate increases; Cleans ash is difficult to be guaranteed, so this arts demand is further perfect.
Conventional flotation process is that floatation feed is sent into flotation column (or flotation device) after the ore pulp preprocessor is handled, and flotation column (or flotation device) sub-elects concentrate and tailings, and gets into subsequent product processing operation separately.This technology is mainly used in the conventional sorting that is prone to coal separation mud, and uses for many years in China, has accumulated rich experience, is the most widely used floatation process of the present coal slime flotation of China.For the sorting of the grey difficult separation coal mud of height, this technology ubiquity product recovery rate and the low defective of production efficiency have seriously restricted final head coal product quality.The key technology of developing the efficient sorting of high grey difficult separation coal mud has as early as possible become a difficult problem needing solution in the coal resources efficient clean utilization process badly.
Summary of the invention
Technical problem: the object of the invention has been to provide the floatation process of a kind of high grey difficult separation coal mud sorting; Solved the contradiction between the high grey difficult separation coal mud sorted product quality and the rate of recovery, proposed that a kind of low cost, technology are simple, small investment, the efficiency of separation are high, the process of the high grey difficult separation coal mud sorting of remarkable in economical benefits.
Technical scheme: thick cleaned coal regrinding and reconcentration sorting process of the present invention; With floating agent be given in the agitator together directly into float coal mud; Gravity flow feeds and roughly selects flotation column or flotation device after the impeller stirring pulping, and the ore pulp that feeds obtains the thick cleaned coal of flotation and roughly selects tail coal after flotation column or flotation device are roughly selected; It is characterized in that: the thick cleaned coal of flotation is fed screen-bowl centrifuge carry out dewatering operation; Obtain thick head coal product and cleaned coal filtrating; Cleaned coal filtrating directly gets into selected flotation column or flotation device and carries out selected operation; Thick head coal product gets into ball mill and carries out grinding operation, and the thick head coal product after levigate gets into selected flotation column or flotation device carries out selected operation, obtains final cleaned coal and selected tail coal;
Then selected tail coal is returned and roughly select the operation of sizing mixing also near going into float coal plaster branch if the ash content of selected tail coal is low, carry out sorting once more through roughly selecting flotation column or flotation device;
If selected tail coal ash content is higher and be higher than into float coal plaster branch, then with selected tail coal directly with roughly select tail coal together as final tail coal.
Beneficial effect: the present invention is based on the practical technique of high grey difficult separation coal mud sorting,,, select the operation trend of selected tail coal according to the different needs of ature of coal condition through obtaining the technological process of low ash content, high-recovery floatation clean coal.Adopt flotation column or flotation device as crucial screening installation, selected after the thick cleaned coal fine grinding for improving providing safeguard of floatation clean coal quality and productive rate.Roughly select and can the intergrowth emersion of coal and gangue be guaranteed high-quality tail coal, thick cleaned coal dissociates selected again through ore grinding, reclaim the cleaned coal in the intergrowth, reduces and roughly selects the pollution of the thin mud of middle high ash to cleaned coal, guarantees the quality and the rate of recovery of cleaned coal.First Application is roughly selected regrind back flotation column or flotation device dressing process of flotation column or flotation device-thick cleaned coal dehydration and is realized the efficient sorting of high grey difficult separation coal mud.Its major advantage has:
Impact in a, the ball mill between steel ball and abrasive action make to roughly select and connect the health mineral in the cleaned coal and fully dissociated, for follow-up raising floatation clean coal quality and the rate of recovery have played important function.
B, roughly select part and can guarantee to have more cleaned coal under the prerequisite of tail coal quality, improve clean coal recovery, final quality of cleaned coal is guaranteed by selected part.
C, this technological process are simple, small investment, and power consumption is little, and operating cost is low.Compare with traditional sorting process, the efficiency of separation is high, remarkable in economical benefits.
Description of drawings
Fig. 1 is sorting process instance one a flow process block diagram of the present invention.
Fig. 2 is the screening installation structural representation of corresponding diagram 1.
Fig. 3 is sorting process instance two flow process block diagrams of the present invention.
Fig. 4 is the screening installation structural representation of corresponding diagram 3.
Among the figure: 1-goes into float coal mud; The 2-floating agent; 3-pan feeding ore pulp; 4-roughly selects cleaned coal; 5-roughly selects tail coal; 6-filtrating; The thick cleaned coal of 7-; The overflow of 8-ball mill; The selected pan feeding of 9-; The 10-head coal product; The selected tail coal of 11-; Pan feeding pump A, agitator B, roughly select flotation column or flotation device C, screen-bowl centrifuge D, ball mill E, Buffer Pool F, selected pan feeding pump G, selected flotation column or flotation device H, cleaned coal pond I, tail coal pond J, middle coal Buffer Pool K, middle coal delivery pump L.
The specific embodiment
Below in conjunction with accompanying drawing embodiments of the invention are done further to describe:
Embodiment one,
As shown in Figure 1, the thick cleaned coal of the present invention selected sorting process of regrinding again, the first-selection operation of sizing mixing: be given to together in the agitator with floating agent with directly into float coal mud, gravity flow feeds rough floatation post or flotation device after the impeller stirring pulping; Carry out rough floatation post or flotation device then and roughly select operation: the ore pulp that feeds obtains the thick cleaned coal of flotation and roughly selects tail coal after flotation column or flotation device are roughly selected; Roughly select the selected operation of regrinding again after cleaned coal dewaters at last: the thick cleaned coal of flotation gets into screen-bowl centrifuge immediately and carries out dewatering operation; Obtain thick head coal product and cleaned coal filtrating; Cleaned coal filtrating directly gets into selected flotation column or flotation device and carries out selected operation; Thick cleaned coal gets into ball mill and carries out grinding operation, and the thick head coal product after levigate also gets into selected flotation column or flotation device carries out selected operation, obtains final cleaned coal and selected tail coal; If selected tail coal ash content is low and near going into float coal plaster branch, then selected tail coal returns roughly selects the operation of sizing mixing, through roughly selecting the sorting once more of flotation column or flotation device; If selected tail coal ash content is high, then directly with roughly select tail coal together as final tail coal.
As shown in Figure 2, thick cleaned coal of the present invention regrinds that selected sorting process comprises pan feeding pump A, agitator B, roughly selects flotation column or flotation device C, screen-bowl centrifuge D, ball mill E, Buffer Pool F, selected pan feeding pump G, selected flotation column or flotation device H again, cleaned coal pond I, tail coal pond J, middle coal Buffer Pool K, middle coal delivery pump L.At first, will go into float coal mud 1 by prior art and send among the agitator B by pan feeding pump A,, form the pan feeding 3 of roughly selecting flotation column or flotation device C by the impeller stirring pulping with floating agent 2; The pan feeding ore pulp of getting ready 3 gravity flows are fed the feeding mouth of roughly selecting flotation column or flotation device C; After flotation column or flotation device are roughly selected; Roughly select cleaned coal 4 and carry out the cleaned coal dewatering operation among the screen-bowl centrifuge D from flowing into; Obtain filtrating 6 with thick cleaned coal 7; Thick cleaned coal 7 carries out the coal-grinding operation from flowing into ball mill E, and ball mill overflow 8 and filtrating 6 process Buffer Pool F are sent in selected flotation column or the flotation device H selected pan feeding 9 selected by selected pan feeding pump G; Obtain head coal product 10 after selected flotation column or flotation device H are selected and go into cleaned coal pond I, selected tail coal 11 is gone into Buffer Pool K, is raised by middle coal delivery pump L and delivers to agitator, sorting once more after sizing mixing.
Embodiment two,
As shown in Figure 3, the thick cleaned coal of the present invention selected sorting process of regrinding again, the operation of at first sizing mixing: be given to together in the agitator with floating agent with directly into float coal mud, gravity flow feeds rough floatation post or flotation device after the impeller stirring pulping; Carry out rough floatation post or flotation device then and roughly select operation: the ore pulp that feeds obtains the thick cleaned coal of flotation and roughly selects tail coal after flotation column or flotation device are roughly selected; Roughly select the selected operation of regrinding again after cleaned coal dewaters again: the thick cleaned coal of flotation gets into screen-bowl centrifuge immediately and carries out dewatering operation; Obtain thick head coal product and cleaned coal filtrating; Cleaned coal filtrating directly gets into selected flotation column or flotation device and carries out selected operation; Thick cleaned coal gets into ball mill and carries out grinding operation, and the thick head coal product after levigate also gets into selected flotation column or flotation device carries out selected operation, obtains final cleaned coal and selected tail coal.If selected tail coal ash content is higher and near roughly selecting the tail coal ash content, then selected tail coal is direct and roughly select tail coal together as final tail coal.
As shown in Figure 4, thick cleaned coal of the present invention regrinds that selected sorting process mainly comprises pan feeding pump A, agitator B, roughly selects flotation column or flotation device C, screen-bowl centrifuge D, ball mill E, Buffer Pool F, selected pan feeding pump G, selected flotation column or flotation device H again, cleaned coal pond I, tail coal pond J.At first, will go into float coal mud 1 and send among the agitator B by pan feeding pump A,, form the pan feeding 3 of roughly selecting flotation column or flotation device C by the impeller stirring pulping with floating agent 2; Pan feeding ore pulp 3 gravity flows of getting ready feed the feeding mouth of roughly selecting flotation column or flotation device C; After flotation column or flotation device are roughly selected; Roughly select cleaned coal 4 and carry out the cleaned coal dewatering operation among the screen-bowl centrifuge D from flowing into; Obtain filtrating 6 with thick cleaned coal 7; Thick cleaned coal 7 carries out the coal-grinding operation from flowing into ball mill E, and ball mill mill back product 8 and filtrating 6 are sent in selected flotation column or the flotation device H selected pan feeding 9 selected through Buffer Pool F by selected pan feeding pump G; The head coal product 10 that obtains after selected flotation column or flotation device H are selected is gone into cleaned coal pond I, selected tail coal 11 with roughly select tail coal 5 from flowing into tail coal pond J, as final tail coal.
Claims (1)
1. a thick cleaned coal selected sorting process of regrinding again; With floating agent be given in the agitator together directly into float coal mud; Gravity flow feeds and roughly selects flotation column or flotation device after the impeller stirring pulping, and the ore pulp that feeds obtains the thick cleaned coal of flotation and roughly selects tail coal after flotation column or flotation device are roughly selected; It is characterized in that: the thick cleaned coal of flotation is fed screen-bowl centrifuge carry out dewatering operation; Obtain thick head coal product and cleaned coal filtrating; Cleaned coal filtrating directly gets into selected flotation column or flotation device and carries out selected operation; Thick head coal product gets into ball mill and carries out grinding operation, and the thick head coal product after levigate gets into selected flotation column or flotation device carries out selected operation, obtains final cleaned coal and selected tail coal;
Then selected tail coal is returned and roughly select the operation of sizing mixing also near going into float coal plaster branch if the ash content of selected tail coal is low, carry out sorting once more through roughly selecting flotation column or flotation device;
If selected tail coal ash content is higher and be higher than into float coal plaster branch, then with selected tail coal directly with roughly select tail coal together as final tail coal.
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102716808A (en) * | 2012-07-09 | 2012-10-10 | 中国矿业大学 | Flotation process for difficultly selected coal slime with high middle density substance content |
| CN103028486A (en) * | 2012-12-21 | 2013-04-10 | 中国矿业大学 | High and medium density coarse slime separation process |
| CN103752414A (en) * | 2014-01-07 | 2014-04-30 | 中国矿业大学(北京) | Pulp mixing reinforced deep flotation technology process |
| CN104668100A (en) * | 2015-02-16 | 2015-06-03 | 中国矿业大学 | Multi-section serial connecting type pulp conditioning technology for improving pulp conditioning efficiency of difficult floated coal slurry |
| CN104826727A (en) * | 2015-04-27 | 2015-08-12 | 中国矿业大学 | Fine-grained medium coal multistage grinding floating technology and system |
| CN106622672A (en) * | 2017-02-24 | 2017-05-10 | 安徽理工大学 | Float fine coal cell distribution treatment technique |
| CN107890955A (en) * | 2017-11-06 | 2018-04-10 | 云南磷化集团有限公司 | A kind of and supporting short route method for floating of chemical plant installations |
| CN109078747A (en) * | 2018-06-26 | 2018-12-25 | 山西天地王坡煤业有限公司 | The method and device of coarse-fine coal classification production |
| CN109759239A (en) * | 2019-03-28 | 2019-05-17 | 中国矿业大学 | A kind of floatation process using brine waste processing coal slime |
| CN113182079A (en) * | 2021-04-28 | 2021-07-30 | 郑州大学 | Method for producing mineralized metallurgical medicament by using low-rank coal for quality improvement, mineralized metallurgical medicament and application |
| CN114713363A (en) * | 2021-10-19 | 2022-07-08 | 中国矿业大学 | Separation and recovery system and process for non-slime-formation fine-particle coal |
| CN114887755A (en) * | 2022-05-11 | 2022-08-12 | 中国矿业大学 | Whole particle fraction separation and pre-enrichment process for coal-series co-associated mineral germanium |
| CN115463738A (en) * | 2022-08-09 | 2022-12-13 | 太原睿孚特选煤技术有限公司 | Coking middling coal multistage grinding multistage flotation deep separation process and system |
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| JPS56144756A (en) * | 1980-04-11 | 1981-11-11 | Dowa Mining Co Ltd | Selective floatation |
| CN101024211A (en) * | 2007-03-26 | 2007-08-29 | 开滦(集团)有限责任公司煤业分公司 | Floating tail-coal graded recovering process |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102716808A (en) * | 2012-07-09 | 2012-10-10 | 中国矿业大学 | Flotation process for difficultly selected coal slime with high middle density substance content |
| CN103028486A (en) * | 2012-12-21 | 2013-04-10 | 中国矿业大学 | High and medium density coarse slime separation process |
| CN103028486B (en) * | 2012-12-21 | 2015-03-04 | 中国矿业大学 | High and medium density coarse slime separation process |
| CN103752414A (en) * | 2014-01-07 | 2014-04-30 | 中国矿业大学(北京) | Pulp mixing reinforced deep flotation technology process |
| CN104668100A (en) * | 2015-02-16 | 2015-06-03 | 中国矿业大学 | Multi-section serial connecting type pulp conditioning technology for improving pulp conditioning efficiency of difficult floated coal slurry |
| CN104826727A (en) * | 2015-04-27 | 2015-08-12 | 中国矿业大学 | Fine-grained medium coal multistage grinding floating technology and system |
| CN106622672A (en) * | 2017-02-24 | 2017-05-10 | 安徽理工大学 | Float fine coal cell distribution treatment technique |
| CN107890955A (en) * | 2017-11-06 | 2018-04-10 | 云南磷化集团有限公司 | A kind of and supporting short route method for floating of chemical plant installations |
| CN109078747A (en) * | 2018-06-26 | 2018-12-25 | 山西天地王坡煤业有限公司 | The method and device of coarse-fine coal classification production |
| CN109759239A (en) * | 2019-03-28 | 2019-05-17 | 中国矿业大学 | A kind of floatation process using brine waste processing coal slime |
| CN109759239B (en) * | 2019-03-28 | 2020-01-17 | 中国矿业大学 | Flotation process for treating coal slime by using salt-containing wastewater |
| CN113182079A (en) * | 2021-04-28 | 2021-07-30 | 郑州大学 | Method for producing mineralized metallurgical medicament by using low-rank coal for quality improvement, mineralized metallurgical medicament and application |
| CN114713363A (en) * | 2021-10-19 | 2022-07-08 | 中国矿业大学 | Separation and recovery system and process for non-slime-formation fine-particle coal |
| CN114887755A (en) * | 2022-05-11 | 2022-08-12 | 中国矿业大学 | Whole particle fraction separation and pre-enrichment process for coal-series co-associated mineral germanium |
| CN115463738A (en) * | 2022-08-09 | 2022-12-13 | 太原睿孚特选煤技术有限公司 | Coking middling coal multistage grinding multistage flotation deep separation process and system |
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Application publication date: 20120502 |