CN203916914U - A kind of coal slime flotation and floatation clean coal dewatering system - Google Patents

A kind of coal slime flotation and floatation clean coal dewatering system Download PDF

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Publication number
CN203916914U
CN203916914U CN201420339438.8U CN201420339438U CN203916914U CN 203916914 U CN203916914 U CN 203916914U CN 201420339438 U CN201420339438 U CN 201420339438U CN 203916914 U CN203916914 U CN 203916914U
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flotation
coal
floatation clean
clean coal
flotation device
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CN201420339438.8U
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Chinese (zh)
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程江
王大鹏
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China University of Mining and Technology CUMT
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China University of Mining and Technology CUMT
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Abstract

The utility model discloses a kind of coal slime flotation and floatation clean coal dewatering system, this system is particularly useful for the thin high slime separation upgrading of cement content of high ash, and system comprises: ore pulp pre-processing device, flotation device, flotation column, screen-bowl centrifuge, floatation clean coal froth breaking bucket, slag stock pump, filter press and tail coal thickener; First three chamber of flotation device is roughly selected froth pulp and is adopted screen-bowl centrifuge dehydration, after the filtrate obtaining and two Room after flotation device are scanned froth pulp and are mixed, adopt again flotation column to complete selected, selected cleaned coal adopts filter press dehydration, filter press filtrate is returned to ore pulp pre-processing device, and after filter cake and screen-bowl centrifuge dehydration, product is merged into final cleaned coal.This system is given full play to the advantageous feature of various device, has improved disposal ability and the efficiency of flotation and dehydration equipment, has improved quality of cleaned coal and productive rate.

Description

A kind of coal slime flotation and floatation clean coal dewatering system
Technical field
The utility model relates to a kind of coal slime flotation and floatation clean coal dewatering system, particularly relates to coal slime flotation and floatation clean coal dewatering system that the thin cement content of a kind of high ash is high.
Background technology
Flotation is the main method of carrying out fine slime sorting upgrading, and adopting at present flotation device and vacuum filter or filter press to carry out the dehydration of one-part form coal slime flotation and floatation clean coal is most widely used technology.But the raising along with mining mechanization degree, ature of coal worse and worse, some spoil argillizations are serious, cause the thin cement content of high ash in coal slime to increase, thin mud in flotation is carried secretly seriously, cause that cleans ash easily exceeds standard, clean coal yield and tail coal ash content low, thereby caused quality of cleaned coal and productive rate to be difficult to take into account.In coal slime flotation process, ash content is low, the good coal slime of floatability is first at former chambers of flotation device emersion, rear several chambers flotation effect of flotation device is not good and mechanical entrapment phenomenon is more serious, in froth pulp, the thin cement content of high ash increases along with the prolongation of flotation time, someone processes the froth pulp shunting of the different flotation cells of 4 Room flotation device accordingly, rear two Room froth pulps carry out adopting flotation device selected after froth breaking, the front two Room froth pulps of selected product and flotation device merge press filtration and produce final cleaned coal, solved to a certain extent the problem existing in production practices, but when the thin cement content of the high ash of floatation feed is high, due to thin mud, to carry phenomenon secretly serious, even former chambers froth pulp ash content of flotation device is also difficult to reach requirement, directly filter-press dehydration ash content is higher, cause equally gravity treatment back of the body ash serious.On the other hand, the vacuum filter or the filter press equipment that extensively adopt now dewater to floatation clean coal, while processing the high coal slime of fine fraction content, and the problem such as often occur that product moisture exceeds standard and the discharging cycle is long.And adopting screen-bowl centrifuge (hereinafter to be referred as Sedimentation centrifugel) to dewater to floatation clean coal, product moisture is low, also has graded desliming effect in dehydration.Adopt flotation column to process aid for Micro-fine Coal Slurry Dewatering and particularly compared with flotation device, there is very strong advantage during high grey difficult separation coal mud, obtained in practice good effect.The one-part form flotation of common flotation and vacuum filter or filter press and floatation clean coal dewatering process system are when processing the high ash difficult separation coal mud that carefully cement content is high, exist the efficiency of separation low, cleans ash and moisture easily exceed standard, the problem that quality of cleaned coal and productive rate can not be taken into account, has hindered the raising of whole coal preparation plant head coal product Quality and yield.
Summary of the invention
Goal of the invention: in order to overcome the deficiencies in the prior art, the utility model provides a kind of coal slime flotation and floatation clean coal dewatering system, possess that the efficiency of separation is high, flotation and floatation clean coal dehydrating effect good, especially solved the problem that in the slime separation upgrading process that the thin cement content of high ash is high, product quality and productive rate are difficult to take into account.
Technical scheme: for achieving the above object, the technical solution of the utility model is as follows:
Coal slime flotation and a floatation clean coal dewatering system, comprise the first ore pulp pre-processing device, the second ore pulp pre-processing device, the first flotation device, the second flotation device, the first floatation clean coal froth breaking bucket, the first slag stock pump, screen-bowl centrifuge, the second floatation clean coal froth breaking bucket, the second slag stock pump, the 3rd ore pulp pre-processing device, flotation column, the 3rd floatation clean coal froth breaking bucket, the 3rd slag stock pump, filter press and tail coal thickener, described the first ore pulp pre-processing device is connected with the second flotation device with the first flotation device respectively with the second ore pulp pre-processing device, a described flotation device and the second flotation device are the flotation device that comprises several chambers, front some chambers concentrate feeder of described the first flotation device and the second flotation device all confluxes and is connected with the first floatation clean coal froth breaking bucket, described the first floatation clean coal froth breaking bucket is connected with the first slag stock pump, described the first slag stock pump is connected with the feeding end of screen-bowl centrifuge, described screen-bowl centrifuge comprises two ports of export, one of them port of export of described screen-bowl centrifuge is connected with final floatation clean coal collecting terminal, rear some chambers concentrate feeder of described the first flotation device and the second flotation device and another port of export of described screen-bowl centrifuge conflux and are connected with the second floatation clean coal froth breaking bucket, described the second floatation clean coal froth breaking bucket is connected with the second slag stock pump, described the second slag stock pump is connected with the 3rd ore pulp pre-processing device, described the 3rd ore pulp pre-processing device is connected with flotation column, described flotation column comprises two ports of export, respectively the concentrate feeder port of export and mine tailing mouth, the concentrate feeder port of export of described flotation column is connected with the 3rd floatation clean coal froth breaking bucket, described the 3rd floatation clean coal froth breaking bucket is connected with the 3rd slag stock pump, described the 3rd slag stock pump is connected with filter press, described filter press comprises two ports of export, respectively the filter cake discharge port of export and filtrate (liquid end, the described cake of filter-press discharge port of export is connected with final floatation clean coal collecting terminal, the filtrate (liquid end of filter press forms loop with the first ore pulp pre-processing device and the second ore pulp pre-processing device respectively and is connected, the mine tailing mouth of described the first flotation device and the second flotation device and the mine tailing mouth of described flotation column conflux and are connected with tail coal thickener, and described tail coal thickener is isolated thickener overflow and thickener underflow.
Preferably, described the first flotation device and the second flotation device are 12 cubic metres of five Room flotation device, and wherein front some chambers are three Room, and rear some chambers are two Room.
Preferably, the model of described flotation column is FCMC-3500 type, and the model of described screen-bowl centrifuge is LWZ1400 * 2000 type.
Beneficial effect: before and after in the utility model flotation device, the shunting of the froth pulp of flotation cell is processed, first three chamber froth pulp that flotation efficiency is high adopts screen-bowl centrifuge dehydration, floatation clean coal and filtrate have been isolated, wherein isolated floatation clean coal has guaranteed the moisture of floatation clean coal, and the thin mud of the height ash of carrying secretly is separated to flotation column with filtrate is for further processing; Flotation efficiency is low, the thin mud of high ash is carried the froth pulp of two Room after serious flotation device secretly and the filtrate that centrifugal dehydrator is filtered in sedimentation adopts the selected treatment effect of flotation column better, gives full play to the effect of flotation column.For high ash, the thin high slime separation upgrading of cement content has very strong applicability to this system, fully solved that to carry the floatation clean coal ash content causing secretly high because of the thin mud of high ash, the problems such as the floatation clean coal dehydration difficulty causing because fine fraction content is high, have improved quality of cleaned coal and productive rate greatly.
Accompanying drawing explanation
Accompanying drawing 1 is the structural representation of coal slime flotation of the present utility model and floatation clean coal dewatering system.
The specific embodiment
Below in conjunction with accompanying drawing, the utility model is further described.
As shown in Figure 1, coal slime flotation and a floatation clean coal dewatering system, comprise the first ore pulp pre-processing device 1, the second ore pulp pre-processing device 2, the first flotation device 3, the second flotation device 4, the first floatation clean coal froth breaking bucket 7, the first slag stock pump 8, screen-bowl centrifuge 9, the second floatation clean coal froth breaking bucket 10, the second slag stock pump 11, the 3rd ore pulp pre-processing device 5, flotation column 6, the 3rd floatation clean coal froth breaking bucket 12, the 3rd slag stock pump 13, filter press 14 and tail coal thickener 16.
Described the first ore pulp pre-processing device 1 is connected with the second flotation device 4 with the first flotation device 3 respectively with the second ore pulp pre-processing device 2, a described flotation device 3 and the second flotation device 4 are the flotation device that comprises several chambers, the first flotation device 3 described in the utility model and the second flotation device 4 are selected is 12 cubic metres of five Room flotation device, wherein, some chambers are three Room, and rear some chambers are two Room.Front some chambers of described the first flotation device 3 and the second flotation device 4 (being first three chamber in the utility model) concentrate feeder all confluxes with the first floatation clean coal froth breaking bucket 7 and is connected, described the first floatation clean coal froth breaking bucket 7 is connected with the first slag stock pump 8, described the first slag stock pump 8 is connected with the feeding end of screen-bowl centrifuge 9, described screen-bowl centrifuge 9 comprises two ports of export, one of them port of export of described screen-bowl centrifuge 9 is connected with final floatation clean coal collecting terminal 15, isolated dehydrating prods is discharged from final floatation clean coal collecting terminal 15.
Another port of export of rear some chambers of described the first flotation device 3 and the second flotation device 4 (in the utility model for rear two Room) concentrate feeder and described screen-bowl centrifuge 9 conflux with the second floatation clean coal froth breaking bucket 10 and be connected (another port of export of described screen-bowl centrifuge 9 is isolated carry secretly the high grey carefully filtrate of mud and rear two Room of the first flotation device 3 and the second flotation device 4 carry secretly the serious froth pulp of high plaster conflux be mixed into the second floatation clean coal froth breaking bucket 10), described the second floatation clean coal froth breaking bucket 10 is connected with the second slag stock pump 11, described the second slag stock pump 11 is connected with the 3rd ore pulp pre-processing device 5, described the 3rd ore pulp pre-processing device 5 is connected with flotation column 6, described flotation column 6 comprises two ports of export, respectively the concentrate feeder port of export and mine tailing mouth, the concentrate feeder port of export of described flotation column 6 is connected with the 3rd floatation clean coal froth breaking bucket 12, described the 3rd floatation clean coal froth breaking bucket 12 is connected with the 3rd slag stock pump 13, described the 3rd slag stock pump 13 is connected with filter press 14, described filter press 14 comprises two ports of export, respectively the filter cake discharge port of export and filtrate (liquid end, the filter cake discharge port of export of described filter press 14 is connected with final floatation clean coal collecting terminal 15, filter cake after filter press 14 dehydrations is discharged from final floatation clean coal collecting terminal 15, merge into final head coal product with the isolated dehydrating prods of screen-bowl centrifuge 9.The filtrate (liquid end of filter press 14 forms loop with the first ore pulp pre-processing device 1 with the second ore pulp pre-processing device 2 respectively and is connected.
Described the first flotation device 3 confluxes and is connected with tail coal thickener 16 with the mine tailing mouth of the second flotation device 4 and the mine tailing mouth of described flotation column 6, and described tail coal thickener 16 is isolated thickener overflow and thickener underflow.
During native system work, first three chamber of the first flotation device 3 and the second flotation device 4 is roughly selected froth pulp and is introduced into the first floatation clean coal froth breaking bucket 7 froth breakings, enter into again screen-bowl centrifuge 9 dehydrations, the filtrate obtaining respectively and floatation clean coal, after wherein after filtrate and the first flotation device 3 and the second flotation device 4, two Room are scanned froth pulp and are mixed, by floatation clean coal froth breaking bucket 10 froth breakings, adopt again the 3rd ore pulp pre-processing device 5, flotation column 6 and the 3rd floatation clean coal froth breaking bucket 16 complete selected and froth breaking, the selected cleaned coal obtaining adopts filter press 14 dehydrations, the filtrate that filter press 14 is discharged is returned to the first ore pulp pre-processing device 1 and the second ore pulp pre-processing device 2, after the filter cake that filter press 14 is discharged and screen-bowl centrifuge 9 dehydrations, floatation clean coal is merged into final cleaned coal.The tail coal of the first flotation device 3, the second flotation device 4 and flotation column 6 enters tail coal thickener 16, and thickener overflow is expelled to circulating water pool from recirculated water outlet 17, and thickener underflow is expelled to tail coal mud filtering equipment from concentrate discharge gate 18.
In the utility model flotation device, first three chamber froth pulp adopts screen-bowl centrifuge dehydration, has isolated floatation clean coal and filtrate; The froth pulp of rear two Room and filtrate adopt the selected processing of flotation column after confluxing, give full play to the effect of flotation column.For high ash, the thin high slime separation upgrading of cement content has very strong applicability to this system, has greatly improved quality of cleaned coal and productive rate.
Need to particularly point out, in fact screen-bowl centrifuge 9 has three material outlet ends, respectively the centrifugate port of export, filtrate (liquid end, the dehydrating prods port of export, but the utility model merges the rear same port of export discharge that adopts by filtrate and centrifugate, therefore relate to the filtrate component of separating in the utility model, has in fact also comprised centrifugate composition.
When factory of coal preparation plant type is 2.0Mt/a left and right, slime content is 0.4Mt/a-0.5Mt/a, and coal slime throughput per hour is 70t-90t, and the model of described flotation column 6 is FCMC-3500 type, and the model of described screen-bowl centrifuge 9 is LWZ1400 * 2000 type.
The above is only preferred embodiment of the present utility model; be noted that for those skilled in the art; do not departing under the prerequisite of the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.

Claims (3)

1. a coal slime flotation and floatation clean coal dewatering system, it is characterized in that: comprise the first ore pulp pre-processing device (1), the second ore pulp pre-processing device (2), the first flotation device (3), the second flotation device (4), the first floatation clean coal froth breaking bucket (7), the first slag stock pump (8), screen-bowl centrifuge (9), the second floatation clean coal froth breaking bucket (10), the second slag stock pump (11), the 3rd ore pulp pre-processing device (5), flotation column (6), the 3rd floatation clean coal froth breaking bucket (12), the 3rd slag stock pump (13), filter press (14) and tail coal thickener (16), described the first ore pulp pre-processing device (1) is connected with the second flotation device (4) with the first flotation device (3) respectively with the second ore pulp pre-processing device (2), a described flotation device (3) and the second flotation device (4) are the flotation device that comprises several chambers, front some chambers concentrate feeder of described the first flotation device (3) and the second flotation device (4) all confluxes and is connected with the first floatation clean coal froth breaking bucket (7), described the first floatation clean coal froth breaking bucket (7) is connected with the first slag stock pump (8), described the first slag stock pump (8) is connected with the feeding end of screen-bowl centrifuge (9), described screen-bowl centrifuge (9) comprises two ports of export, one of them port of export of described screen-bowl centrifuge (9) is connected with final floatation clean coal collecting terminal (15),
Rear some chambers concentrate feeder of described the first flotation device (3) and the second flotation device (4) and another port of export of described screen-bowl centrifuge (9) conflux and are connected with the second floatation clean coal froth breaking bucket (10), described the second floatation clean coal froth breaking bucket (10) is connected with the second slag stock pump (11), described the second slag stock pump (11) is connected with the 3rd ore pulp pre-processing device (5), described the 3rd ore pulp pre-processing device (5) is connected with flotation column (6), described flotation column (6) comprises two ports of export, respectively the concentrate feeder port of export and mine tailing mouth, the concentrate feeder port of export of described flotation column (6) is connected with the 3rd floatation clean coal froth breaking bucket (12), described the 3rd floatation clean coal froth breaking bucket (12) is connected with the 3rd slag stock pump (13), described the 3rd slag stock pump (13) is connected with filter press (14), described filter press (14) comprises two ports of export, respectively the filter cake discharge port of export and filtrate (liquid end, the filter cake discharge port of export of described filter press (14) is connected with final floatation clean coal collecting terminal (15), the filtrate end of filter press (14) forms loop with the first ore pulp pre-processing device (1) and the second ore pulp pre-processing device (2) respectively and is connected,
The mine tailing mouth of described the first flotation device (3) and the second flotation device (4) and the mine tailing mouth of described flotation column (6) conflux and are connected with tail coal thickener (16), and described tail coal thickener (16) is isolated thickener overflow and thickener underflow.
2. a kind of coal slime flotation and floatation clean coal dewatering system according to claim 1, it is characterized in that: described the first flotation device (3) and the second flotation device (4) are 12 cubic metres of five Room flotation device, wherein, some chambers are three Room, and rear some chambers are two Room.
3. a kind of coal slime flotation and floatation clean coal dewatering system according to claim 1, is characterized in that: the model of described flotation column (6) is FCMC-3500 type, and the model of described screen-bowl centrifuge (9) is LWZ1400 * 2000 type.
CN201420339438.8U 2014-06-24 2014-06-24 A kind of coal slime flotation and floatation clean coal dewatering system Expired - Fee Related CN203916914U (en)

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104722389A (en) * 2015-03-02 2015-06-24 中国矿业大学 Dissociating, independent slurry mixing and bulk floatation process for fine grain middings
CN106733221A (en) * 2016-12-02 2017-05-31 武汉理工大学 For the dehydration reagent removal desliming process of ore dressing flotation
CN108435439A (en) * 2017-02-16 2018-08-24 天津美腾科技有限公司 A kind of half thickening flotation technique of black water
CN108855586A (en) * 2017-05-12 2018-11-23 杨林 A kind of Unit erriger of coal floatation
CN110899001A (en) * 2019-10-24 2020-03-24 国家能源集团乌海能源有限责任公司 Two-stage flotation process for difficult-to-float coal slime
WO2020192046A1 (en) * 2019-03-28 2020-10-01 中国矿业大学 Flotation process for treating coal slime by using salt-containing wastewater
CN112794496A (en) * 2020-12-25 2021-05-14 国家能源投资集团有限责任公司 Method and system for removing suspended matters and recycling coal slime from mine water
CN113522515A (en) * 2021-06-17 2021-10-22 中国矿业大学 Coal refloating process in high-ash difficult-separation coal slime
RU2771707C1 (en) * 2019-03-28 2022-05-11 Чайна Юниверсити Оф Майнинг Энд Текнолоджи Flotation method for processing coal sludge applying saline waste water
CN114522798A (en) * 2021-12-30 2022-05-24 淮北矿业股份有限公司 Separation process for ultrafine high-ash coal slime difficult to separate
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

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104722389B (en) * 2015-03-02 2018-10-30 中国矿业大学 Coal dissociation-is independently sized mixing-bulk flotation technique in a kind of particulate
CN104722389A (en) * 2015-03-02 2015-06-24 中国矿业大学 Dissociating, independent slurry mixing and bulk floatation process for fine grain middings
CN106733221A (en) * 2016-12-02 2017-05-31 武汉理工大学 For the dehydration reagent removal desliming process of ore dressing flotation
CN106733221B (en) * 2016-12-02 2019-08-23 武汉理工大学 Dehydration reagent removal desliming process for ore dressing flotation
CN108435439A (en) * 2017-02-16 2018-08-24 天津美腾科技有限公司 A kind of half thickening flotation technique of black water
CN108855586A (en) * 2017-05-12 2018-11-23 杨林 A kind of Unit erriger of coal floatation
RU2771707C1 (en) * 2019-03-28 2022-05-11 Чайна Юниверсити Оф Майнинг Энд Текнолоджи Flotation method for processing coal sludge applying saline waste water
WO2020192046A1 (en) * 2019-03-28 2020-10-01 中国矿业大学 Flotation process for treating coal slime by using salt-containing wastewater
RU2771707C9 (en) * 2019-03-28 2022-08-04 Чайна Юниверсити Оф Майнинг Энд Текнолоджи Flotation method for processing coal sludge applying saline waste water
CN110899001A (en) * 2019-10-24 2020-03-24 国家能源集团乌海能源有限责任公司 Two-stage flotation process for difficult-to-float coal slime
CN112794496A (en) * 2020-12-25 2021-05-14 国家能源投资集团有限责任公司 Method and system for removing suspended matters and recycling coal slime from mine water
CN113522515A (en) * 2021-06-17 2021-10-22 中国矿业大学 Coal refloating process in high-ash difficult-separation coal slime
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
CN114522798A (en) * 2021-12-30 2022-05-24 淮北矿业股份有限公司 Separation process for ultrafine high-ash coal slime difficult to separate

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