CN102716813A - Electrolytic flotation method for fine coal - Google Patents
Electrolytic flotation method for fine coal Download PDFInfo
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- CN102716813A CN102716813A CN201210204779XA CN201210204779A CN102716813A CN 102716813 A CN102716813 A CN 102716813A CN 201210204779X A CN201210204779X A CN 201210204779XA CN 201210204779 A CN201210204779 A CN 201210204779A CN 102716813 A CN102716813 A CN 102716813A
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Abstract
The invention relates to an electrolytic flotation method for fine coal. A graphite anode tube, a stainless steel cathode channel and aluminum sulfate are used as electrolyte in an electrolytic flotation tank, octanol is used as a foaming agent in the flotation tank, kerosene is used as a collector in the flotation tank, electrolytic flotation is performed under the action of a direct-current electric field, and then bubble collection, sedimentation and drying are performed to obtain clean coal and tailing. The fine coal after electrolytic flotation is high in purity and low in water content and has fewer impurities, the yield of the clean coal is 95%, the ash content of the clean coal is 7.98%, the yield of the tailing is 5%, the ash content of the tailing is 70.52%, the clean coal and the tailing can be used as raw materials in pharmacy, fine chemical engineering and high value-added industry, and the electrolytic flotation method for the fine coal is perfect.
Description
Technical field
The present invention relates to a kind of electrolytic floatage method of Bed for Fine Coal, belong to the washing of Bed for Fine Coal and the technical field of application.
Background technology
Coal is a kind of mixture, contains the number of chemical material, for example carbon, hydrogen, oxygen, nitrogen, sulphur, phosphorus etc.; Along with the raising of mechanical coal mining degree, the quantity of Bed for Fine Coal sharply increases, along with the coal user is more and more stricter to the requirement of Coal Quality; The range of application of coal more and more widely; The application of some high value added products, the coal raw material that for example pharmacy, fine chemistry industry, chemicals etc. use all has very high coal index; On the other hand, the pollution that need control environment, thereby clean coal technology proposed more and more high requirement is so must just can satisfy instructions for use to the Bed for Fine Coal washing of going ahead of the rest; Flotation is one of method for separating of Bed for Fine Coal, is the effective method of current selected Bed for Fine Coal, and flotation is handled black water and played an important role, so obtained extensive use.
Flotation is the important method of Bed for Fine Coal sorting, and floatation process is the complex physicochemical process of in the solid, liquid, gas three-phase system, accomplishing, the one, and the adjusting of granular boundary character is like the adjusting of wetability, surface electrical behavior, characterization of adsorption; The 2nd, utilize the variation that acts between the particle, regulate and control the dispersion of granular system and gather the bulk attitude; The 3rd, act on boundary through suitable physical field, realize grain sorting like gas/liquid interface, liquid/liquid interface.
Summary of the invention
Goal of the invention
The objective of the invention is situation to background technology; Adopt electro-flotation method washing Bed for Fine Coal; With aluminum sulfate is electrolyzer, is foaming agent with secondary octanol, is collecting agent with kerosene; Washing Bed for Fine Coal in electrolytic cell, flotation cell, foam tank, stillpot is to increase substantially particulate coal yield and quality.
Technical scheme
The chemical substance material that the present invention uses is: Bed for Fine Coal, aluminum sulfate, secondary octanol, kerosene, water, graphite-pipe, it is following that it prepares consumption: with kilogram, liter, millimeter is measurement unit
Bed for Fine Coal: C
659H
557O
72N
10S
5P
3100kg ± 0.1kg
Secondary octanol: C
8H
18O 0.049L ± 0.0001L
Kerosene: C
225H
4520.1L ± 0.01L
Aluminum sulfate: Al
2(SO
4)
318H
2O 1kg ± 0.01kg
Water: H
2O 2000L ± 1L
Graphite-pipe: C φ 300mm * 50mm * 500mm
Electrolytic floatage Bed for Fine Coal method is following:
(1) selected chemical substance material
The chemical substance material that coal separation is used will carry out selected, and carries out quality purity control:
Bed for Fine Coal: solid-state solid carbon amount>95%
Secondary octanol: liquid liquid 96%
Kerosene: liquid liquid 96%
Aluminum sulfate: solid-state solid 99.5%
Graphite-pipe: solid-state solid carbon amount>99.9%
Water: liquid liquid 95%
(2) preparing electrolyte
1kg ± 0.01kg places rustless steel container with aluminum sulfate, adds entry 10L, stirs 30min with agitator, and it is dissolved into: the aluminum sulfate aqueous solution of 0.15mol/L;
(3) electrolysis Bed for Fine Coal
The electrolysis Bed for Fine Coal is carried out in electrolytic cell, is under the effect of DC electric field and electrolyte, to accomplish;
1. electrolytic cell is made with stainless steel material, is the DC electric field negative electrode, and the electrolytic cell intermediate vertical is put graphite-pipe, and graphite-pipe is the DC electric field anode;
2. Bed for Fine Coal 100kg is added in the electrolytic cell;
Water 1000L is added in the electrolytic cell;
The aluminum sulfate aqueous solution 1L of 0.15mol/L is added in the electrolytic cell;
3. connect electrolytic cell stainless steel cathode power supply;
Connect the graphite-pipe anode supply;
DC electric field operating voltage 36V, electric current 0.5A;
4. under DC electric field, under the electrolyte effect, Bed for Fine Coal is carried out electrolysis, electrolysis time 15min becomes coal slurry after the electrolysis;
(4) flotation Bed for Fine Coal
1. with in the coal slurry suction flotation cell after the electrolysis, add collecting agent kerosene 0.1L, add the secondary octanol 0.049L of foaming agent, carry out flotation, will produce froth bed in the flotation cell;
2. close negative electrode, anode dc source;
3. scrape froth bed with scraper plate, then with in the bubble suction foam tank, the deposition clarification, sediment is a cleaned coal;
(5) concentration basin concentrates
Remaining coal slurry after the flotation is evacuated to concentration basin, concentrates, emit primary water after concentrating, the Bed for Fine Coal after the retention flotation is a tail coal;
(6) dried cleaned coal, tail coal
Cleaned coal after the flotation, tail coal are collected in respectively in the ceramic vessel, place drying box dry then, 75 ℃ of baking temperatures, drying time, 120min became cleaned coal and tail coal after the drying;
(7) detect, analyze, characterize
Pattern, color and luster, chemical composition, Chemical Physics performance to cleaned coal and tail coal detect, analyze, characterize;
Carry out the coal sample functional group analysis with FTIR8400S type infrared spectrometer;
Carry out the Zeta potential analysis with electrophoresis apparatus;
Conclusion: the Bed for Fine Coal cleaned coal product of electrolytic floatage is black, graininess powder, productive rate 95%, and ash content 7.98%, tail coal are the black powder, productive rate is 5%, ash content 70.52%;
(8) store
Cleaned coal behind the electrolytic floatage and tail coal are stored in the dried and clean environment respectively, waterproof, sun-proof, moistureproof, fire prevention, acid-proof alkali salt to corrode 20 ℃ ± 2 ℃ of storage temperatures, relative humidity≤10%.
Beneficial effect
The present invention compares with background technology has tangible advance, and the electrolytic floatage of Bed for Fine Coal carries out in electrolytic cell, flotation cell, foam tank, sedimentation basin, and employing aluminum sulfate is electrolyte; Secondary octanol is a foaming agent; Kerosene is collecting agent, is that anode, stainless steel electrolytic groove are electrolysis cathode with the graphite-pipe, under the DC electric field effect, carries out electrolysis; Carry out flotation, deposition, drying then; The cleaned coal of electrolytic floatage, tail coal purity are high, impurity is few, moisture is few, can make raw material in pharmacy, fine chemistry industry and high added value industry and use, and are the methods of very good electrolytic floatage Bed for Fine Coal.
Description of drawings
Fig. 1 is the state diagram of electrolytic floatage Bed for Fine Coal
Shown in the figure, list of numerals is following:
1, electrolytic cell, 2, the stainless steel cathode groove, 3, the graphite anode pipe, 4, first coal slurry pump, 5, drain pipe; 6, flotation cell, 7, foam tank, 8, sedimentation basin, 9, electric cabinet, 10, display screen; 11, indicator lamp, 12, the anode modulator, 13, the negative electrode modulator, 14, the first coal slurry pump switch, 15, the second coal slurry pump switch; 16, electrolysis whip switch, 17, the flotation whip switch, 18, the electrolysis agitator, 19, the flotation agitator, 20, anode cable; 21, cathode cable, 22, electrolyte, 23, flotation fluid, 24, bubble, 25, lead.
The specific embodiment
Below in conjunction with accompanying drawing the present invention is further specified:
Shown in Figure 1, be the state diagram of electrolytic floatage Bed for Fine Coal, each location, connecting relation want correct, according to quantity proportioning, operation according to the order of sequence.
The value of the chemical substance that electrolytic floatage uses is to confirm by the scope that preliminary election is provided with, and is measurement unit with kilogram, liter, millimeter.
The electrolytic floatage of Bed for Fine Coal carries out in electrolytic cell, flotation cell, foam tank, sedimentation basin, under DC electric field, electrolyte, foaming agent, collecting agent effect, accomplishes;
Electrolytic cell is a rectangle; The periphery of electrolytic cell 1 is a stainless steel cathode groove 2; Graphite anode pipe 3, electrolysis agitator 18 and electrolyte 22 are vertically put in the centre position in the stainless steel cathode groove 2; The right part of electrolytic cell 1 is a flotation cell 6, and is connected by drain pipe 5, first coal slurry pump 4, is provided with flotation agitator 19 and flotation fluid 23 in the flotation cell 6; Flotation cell 6 right parts are provided with foam tank 7, sedimentation basin 8, and are connected by drain pipe 5, second coal slurry pump 17, and the bubble 24 in the flotation cell 6 gets into foam tank 7 interior deposition clarifications and obtains cleaned coal, and the coal slurry in the flotation cell 6 gets into sedimentation basin 8 post precipitations and obtains tail coal; Left part at electrolytic cell 1 is provided with electric cabinet 9, on electric cabinet 9, is provided with display screen 10, switch 16 is stirred in indicator lamp 11, anode modulator 12, negative electrode modulator 13, the first coal slurry pump switch 14, the second coal slurry pump switch 15, electrolysis, switch 17 is stirred in flotation; Electric cabinet 9 connects with graphite anode pipe 3 through anode cable 20, through cathode cable 21 connect, pass through lead 25 and electrolysis agitator 18, flotation agitator 19, first coal slurry pump 4 with stainless steel cathode groove 2, second coal slurry pump 17 connects.
Claims (2)
1. the electrolytic floatage method of a Bed for Fine Coal, it is characterized in that: the chemical substance material of use is: Bed for Fine Coal, aluminum sulfate, secondary octanol, kerosene, water, graphite-pipe, it is following that it prepares consumption: with kilogram, liter, millimeter is measurement unit
Bed for Fine Coal: C
659H
557O
72N
10S
5P
3100kg ± 0.1kg
Secondary octanol: C
8H
18O 0.049L ± 0.0001L
Kerosene: C
225H
4520.1L ± 0.01L
Aluminum sulfate: Al
2(SO
4)
318H
2O 1kg ± 0.01kg
Water: H
2O 2000L ± 1L
Graphite-pipe: C φ 300mm * 50mm * 500mm
Electrolytic floatage Bed for Fine Coal method is following:
(1) selected chemical substance material
The chemical substance material that coal separation is used will carry out selected, and carries out quality purity control:
Bed for Fine Coal: solid-state solid carbon amount>95%
Secondary octanol: liquid liquid 96%
Kerosene: liquid liquid 96%
Aluminum sulfate: solid-state solid 99.5%
Graphite-pipe: solid-state solid carbon amount>99.9%
Water: liquid liquid 95%
(2) preparing electrolyte
1kg ± 0.01kg places rustless steel container with aluminum sulfate, adds entry 10L, stirs 30min with agitator, and it is dissolved into: the aluminum sulfate aqueous solution of 0.15mol/L;
(3) electrolysis Bed for Fine Coal
The electrolysis Bed for Fine Coal is carried out in electrolytic cell, is under the effect of DC electric field and electrolyte, to accomplish;
1. electrolytic cell is made with stainless steel material, is the DC electric field negative electrode, and the electrolytic cell intermediate vertical is put graphite-pipe, and graphite-pipe is the DC electric field anode;
2. Bed for Fine Coal 100kg is added in the electrolytic cell;
Water 1000L is added in the electrolytic cell;
The aluminum sulfate aqueous solution 1L of 0.15mol/L is added in the electrolytic cell;
3. connect electrolytic cell stainless steel cathode power supply;
Connect the graphite-pipe anode supply;
DC electric field operating voltage 36V, electric current 0.5A;
4. under DC electric field, under the electrolyte effect, Bed for Fine Coal is carried out electrolysis, electrolysis time 15min becomes coal slurry after the electrolysis;
(4) flotation Bed for Fine Coal
1. with in the coal slurry suction flotation cell after the electrolysis, add collecting agent kerosene 0.1L, add the secondary octanol 0.049L of foaming agent, carry out flotation, will produce froth bed in the flotation cell;
2. close negative electrode, anode dc source;
3. scrape froth bed with scraper plate, then with in the bubble suction foam tank, the deposition clarification, sediment is a cleaned coal;
(5) concentration basin concentrates
Remaining coal slurry after the flotation is evacuated to concentration basin, concentrates, emit primary water after concentrating, the Bed for Fine Coal after the retention flotation is a tail coal;
(6) dried cleaned coal, tail coal
Cleaned coal after the flotation, tail coal are collected in respectively in the ceramic vessel, place drying box dry then, 75 ℃ of baking temperatures, drying time, 120min became cleaned coal and tail coal after the drying;
(7) detect, analyze, characterize
Pattern, color and luster, chemical composition, Chemical Physics performance to cleaned coal and tail coal detect, analyze, characterize;
Carry out the coal sample functional group analysis with FTIR8400S type infrared spectrometer;
Carry out the Zeta potential analysis with electrophoresis apparatus;
Conclusion: the Bed for Fine Coal cleaned coal product of electrolytic floatage is black, graininess powder, productive rate 95%, and ash content 7.98%, tail coal are the black powder, productive rate is 5%, ash content 70.52%;
(8) store
Cleaned coal behind the electrolytic floatage and tail coal are stored in the dried and clean environment respectively, waterproof, sun-proof, moistureproof, fire prevention, acid-proof alkali salt to corrode 20 ℃ ± 2 ℃ of storage temperatures, relative humidity≤10%.
2. the electrolytic floatage method of a kind of Bed for Fine Coal according to claim 1, it is characterized in that: the electrolytic floatage of Bed for Fine Coal carries out in electrolytic cell, flotation cell, under DC electric field, electrolyte, foaming agent, collecting agent effect, accomplishes;
Electrolytic cell is a rectangle; The periphery of electrolytic cell (1) is stainless steel cathode groove (2); Graphite anode pipe (3), electrolysis agitator (18) and electrolyte (22) are vertically put in the interior centre position of stainless steel cathode groove (2); The right part of electrolytic cell (1) is flotation cell (6), and is connected by drain pipe (5), first coal slurry pump (4), is provided with flotation agitator (19) and flotation fluid (23) in the flotation cell (6); Flotation cell (6) right part is provided with foam tank (7), sedimentation basin (8); And by drain pipe (5), second coal slurry pump (17) connection; Bubble (24) in the flotation cell (6) gets into to precipitate in the foam tank (7) to clarify and obtains cleaned coal, and the coal slurry in the flotation cell (6) gets into sedimentation basin (8) post precipitation and obtains tail coal; Left part at electrolytic cell (1) is provided with electric cabinet (9), on electric cabinet (9), is provided with display screen (10), indicator lamp (11), anode modulator (12), negative electrode modulator (13), the first coal slurry pump switch (14), the second coal slurry pump switch (15), electrolysis stir switch (16), switch (17) is stirred in flotation; Electric cabinet (9) connects with graphite anode pipe (3) through anode cable (20), connects with stainless steel cathode groove (2), connects with electrolysis agitator (18), flotation agitator (19), first coal slurry pump (4), second coal slurry pump (17) through lead (25) through cathode cable (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210204779XA CN102716813A (en) | 2012-06-20 | 2012-06-20 | Electrolytic flotation method for fine coal |
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|---|---|---|---|
| CN201210204779XA CN102716813A (en) | 2012-06-20 | 2012-06-20 | Electrolytic flotation method for fine coal |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103816977A (en) * | 2014-02-28 | 2014-05-28 | 太原理工大学 | Coking middling coal coarse grinding and flotation method in coking |
| CN104258975A (en) * | 2014-09-30 | 2015-01-07 | 西安科技大学 | Electroflotation and separation method of coal rock maceral |
| CN106513183A (en) * | 2016-12-06 | 2017-03-22 | 武汉理工大学 | Micro bubble flotation method for micro-fine particle oxide minerals |
| CN108754524A (en) * | 2018-05-28 | 2018-11-06 | 昆明理工大学 | A method of continuously preparing Kocide SD using electrolysis |
Citations (5)
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| JPS57190092A (en) * | 1981-05-19 | 1982-11-22 | Sumitomo Heavy Ind Ltd | Flotation granulation of fine powder coal |
| CN201197963Y (en) * | 2008-04-07 | 2009-02-25 | 佛山市顺德区奇胜实业有限公司 | Fly ash flotation carbon production apparatus |
| CN101690914A (en) * | 2009-10-14 | 2010-04-07 | 太原煤炭气化(集团)有限责任公司 | Method for carrying out coal flotation by using coking water |
| CN102172509A (en) * | 2011-01-25 | 2011-09-07 | 太原理工大学 | Ultrasonic electrolysis dehydrating method for fine coal |
| CN102276027A (en) * | 2011-05-30 | 2011-12-14 | 太原理工大学 | Method for ultrasonic treatment, electrolysis and flocculation of slime water |
-
2012
- 2012-06-20 CN CN201210204779XA patent/CN102716813A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57190092A (en) * | 1981-05-19 | 1982-11-22 | Sumitomo Heavy Ind Ltd | Flotation granulation of fine powder coal |
| CN201197963Y (en) * | 2008-04-07 | 2009-02-25 | 佛山市顺德区奇胜实业有限公司 | Fly ash flotation carbon production apparatus |
| CN101690914A (en) * | 2009-10-14 | 2010-04-07 | 太原煤炭气化(集团)有限责任公司 | Method for carrying out coal flotation by using coking water |
| CN102172509A (en) * | 2011-01-25 | 2011-09-07 | 太原理工大学 | Ultrasonic electrolysis dehydrating method for fine coal |
| CN102276027A (en) * | 2011-05-30 | 2011-12-14 | 太原理工大学 | Method for ultrasonic treatment, electrolysis and flocculation of slime water |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103816977A (en) * | 2014-02-28 | 2014-05-28 | 太原理工大学 | Coking middling coal coarse grinding and flotation method in coking |
| CN103816977B (en) * | 2014-02-28 | 2016-02-10 | 太原理工大学 | A kind of coal collector CMT method in coking |
| CN104258975A (en) * | 2014-09-30 | 2015-01-07 | 西安科技大学 | Electroflotation and separation method of coal rock maceral |
| CN104258975B (en) * | 2014-09-30 | 2017-02-15 | 西安科技大学 | Electroflotation and separation method of coal rock maceral |
| CN106513183A (en) * | 2016-12-06 | 2017-03-22 | 武汉理工大学 | Micro bubble flotation method for micro-fine particle oxide minerals |
| CN108754524A (en) * | 2018-05-28 | 2018-11-06 | 昆明理工大学 | A method of continuously preparing Kocide SD using electrolysis |
| CN108754524B (en) * | 2018-05-28 | 2019-12-03 | 昆明理工大学 | A method of Kocide SD is continuously prepared using electrolysis method |
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Application publication date: 20121010 |