CN110508403A - A kind of method of hydrogen, the combined reinforced coal slime flotation of oxygen plasma - Google Patents

A kind of method of hydrogen, the combined reinforced coal slime flotation of oxygen plasma Download PDF

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Publication number
CN110508403A
CN110508403A CN201910788432.6A CN201910788432A CN110508403A CN 110508403 A CN110508403 A CN 110508403A CN 201910788432 A CN201910788432 A CN 201910788432A CN 110508403 A CN110508403 A CN 110508403A
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China
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plasma
hydrogen
coal slime
oxygen plasma
flotation
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CN201910788432.6A
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CN110508403B (en
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王大鹏
胥萌
李琛光
李佳
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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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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B03SEPARATION 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
    • B03DFLOTATION; DIFFERENTIAL SEDIMENTATION
    • B03D1/00Flotation
    • B03D1/001Flotation agents
    • B03D1/018Mixtures of inorganic and organic compounds
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B03SEPARATION 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
    • B03DFLOTATION; DIFFERENTIAL SEDIMENTATION
    • B03D1/00Flotation
    • B03D1/02Froth-flotation processes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B03SEPARATION 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
    • B03DFLOTATION; DIFFERENTIAL SEDIMENTATION
    • B03D2203/00Specified materials treated by the flotation agents; specified applications
    • B03D2203/02Ores
    • B03D2203/04Non-sulfide ores
    • B03D2203/08Coal ores, fly ash or soot

Abstract

The invention discloses a kind of method of hydrogen, the combined reinforced coal slime flotation of oxygen plasma, includes the following steps: that delivering dry coal slurry improves organic matter surface hydrophobic by hydrogen plasma selectively processing, directly expand its floatability difference with inorganic mineral;Conventional collecting agent is fully dispersed through emulsification first, then is activated in aqueous environment by oxygen plasma, improves the trapping performance of medicament;Delivering dry coal slurry through hydrogen plasma process is mixed with the medicament aqueous solution through the luxuriant daughter processing such as oxygen sizes mixing, and adsorbs medicament sufficiently with coal slime;Above-mentioned ore pulp feeds flotation unit after addition foaming agent stirring, is passed through bubble and is enriched with flammable body in the foam, inorganic mineral is non-rising, realizes the high efficiente callback of flammable body.Using method of the invention, coal slime flotation dosing can be made to significantly reduce, combustible recovery effectively improves, and cleaned coal loss significantly reduces.

Description

A kind of method of hydrogen, the combined reinforced coal slime flotation of oxygen plasma
Technical field
The present invention relates to flotation fields, and in particular to the method for the combined reinforced coal slime flotation of Yi Zhongqing, oxygen plasma, it is special Not Shi Yongyu the difficult float coal such as oxidized coal, low-order coal plasma fortified flotation ash method.
Background technique
Flotation is the maturation of coal slime upgrading, effective ways.It is modified to coal slime surface often through medicament, improve coal slime surface Hydrophobicity, and disperse effect of the non polar reagent such as diesel oil kerosene in water environment is bad, there is scholar couple on this basis Non polar reagent is emulsified, its dispersion effect in aqueous solution is improved, thus composite drug generates.It is some to contain polarized Collecting agent of functional group such as tetrahydrofuran, biodiesel, oxidated diesel oil etc. equally can with more efficient collecting organic matter.There are also Person's direct modified non-polar collecting agent of dielectric impedance oxygen plasma, is prepared for miscellaneous Polar Collectors flotation low order coal slime, so And this method is not modified nonpolar collecting agent in flotation environment (water environment), but pure medicament is changed Property, with practical flotation situation different from.
Only coal slime surface is modified indirectly in addition, adsorbing the method for improving coal slime surface hydrophobic with medicament, coal slime The hydrophobicity of itself does not change, and lacks the method being directly modified to coal slime surface hydrophobic at present.
Summary of the invention
The object of the invention is in order to solve the problems, such as above-mentioned coal slime flotation process, provide a kind of can directly change It is apt to coal slime surface hydrophobic, and improves the method for collecting agent trapping ability in water environment, can effectively improve coal slime floatability, Organic matter loss is reduced, floatation process index is improved and reduces the plasma fortified coal slime flotation method of medicine consumption.
Low temperature plasma is mature effective modified method, can make the excitation of reaction-ure surface molecule, dissociation and ionization, Change the group composition of reaction-ure surface, while can still keep bulk properties.Hydrogen plasma can be used for being promoted delivering dry coal slurry surface Hydrophobic grouping quantity, improve the floatability of coal slime itself, and conventional collecting agent have after oxygen plasma activates it is stronger Collecting ability, two kinds of plasma body cooperative effects, helps to strengthen coal slime flotation.
Technical solution: to achieve the above object, the technical solution adopted by the present invention are as follows:
A kind of method of hydrogen, the combined reinforced coal slime flotation of oxygen plasma, including coal slime hydrogen plasma process-collecting Oxygen plasma activation-mixing is sized mixing-floatation process after agent emulsification, and coal slime is improved by hydrogen plasma selectively processing The hydrophobic group content on coal slime surface improves organic matter surface hydrophobic, it is poor with the floatability of inorganic mineral directly to expand it It is different;Conventional collecting agent is fully dispersed through emulsification first, then is activated in aqueous environment by oxygen plasma, improves medicament Trapping performance;Coal slime through hydrogen plasma process is mixed with the medicament aqueous solution activated through oxygen plasma sizes mixing, and makes medicine Agent is sufficiently adsorbed with coal slime;Above-mentioned ore pulp feeds flotation unit, is passed through bubble after addition foaming agent stirring, and flammable body is rich In the foam, inorganic mineral is non-rising, realizes the high efficiente callback of flammable body for collection.
Further, hydrogen plasma process material is delivering dry coal slurry.
Further, there are many hydrogen plasma producing methods, such as glow discharge plasma, dielectric impedance plasma Body, radio frequency plasma, point discharge plasma etc., it is preferable that the producing method of hydrogen plasma is radio frequency in the present invention Plasma.
Further, hydrogen plasma reaction chamber is overturning plasm reaction cavity.
Further, conventional collecting agent is that oxygen plasma reaction tank is fed after emulsion dispersion.
Further, oxygen plasma producing method is high-voltage tip discharging plasma.
Preferably, hydrogen plasma gas inflated amount is 30-75L/ (minm2)。
Preferably, hydrogen plasma modification time is 5-10min.
Preferably, the volumetric concentration ratio of hydrogen and argon gas is 3:97.
Preferably, oxygen plasma gas aeration quantity is 30L/ (minm2)。
Preferably, oxygen plasma modification time is 5-9min.
The present invention is modified coal slime with hydrogen plasma, and conventional catch is activated in water environment using oxygen plasma Agent is received, the efficient removal of inorganic mineral is realized finally by direct flotation.The effect of hydrogen plasma is activated hydrogen atom and coal slime Reduction reaction occurs for the polar functional group on surface, improves hydrophobic group content while removing organic matter Surface oxygen-containing groups, directly It connects and improves organic matter surface hydrophobicity ability.The effect of oxygen plasma is the introducing polarity for activating oxygen atom in conventional collecting agent Its collecting ability to coal slime improves in functional group.Hydrogen, oxygen plasma joint, the effect for further improving coal and medicament are imitated Fruit enhances coal slime flotation.
The utility model has the advantages that the method for a kind of hydrogen provided by the invention, the combined reinforced coal slime flotation of oxygen plasma, with existing skill Art is compared, and has the advantage that reagent consumption when can be effectively reduced coal slime flotation, improves floatation indicators.Original is floated from entering Direct modified start with of material fundamentally improves the floatability of organic matter in pan feeding, improves medicine in conjunction with plasma Activiation method The trapping performance of agent provides inside and outside advantage for the abundant flotation of combustable organic body, reduces reagent consumption, obtains good Index;Effective way is provided to improve coal slime flotation upgrading efficiency.Hydrogen, oxygen plasma joint, can further decrease Medicine consumption.Using method of the invention, coal slime flotation can be made to reduce compared with conventional flotation collector dosage, clean coal yield improves.It solves The problem of existing flotation operation effect difference, has reached the purpose of the present invention.
The present invention provides a kind of methods that hydrogen, oxygen plasma strengthen coal slime flotation, and hydrogen, oxygen plasma is respectively adopted Conventional collecting agent is activated in modified coal slime and aqueous solution, is not only increased the hydrophobicity of coal slime itself, is also improved collecting agent Adsorption capacity reduces reagent consumption, provides effective way to improve coal slime flotation upgrading efficiency.
Detailed description of the invention
Fig. 1 is plasma fortified Coal Slurry Floatation Process figure;
Fig. 2 is coal table behind the hydrogen plasma process front and back of embodiment, and the collecting agent of absorption oxygen plasma activation Face contact angle variation diagram.
Specific embodiment
The present invention include after the emulsification of coal slime hydrogen plasma process-collecting agent oxygen plasma activation-mixing size mixing- Floatation process, delivering dry coal slurry improve the hydrophobic group content on coal slime surface by hydrogen plasma selectively processing, have improved Machine matter surface hydrophobic directly expands its floatability difference with inorganic mineral;Conventional collecting agent is fully dispersed through emulsification first, It is activated in aqueous environment by oxygen plasma again, improves the trapping performance of medicament;It is dry through hydrogen plasma process Coal slime is mixed with the collecting agent aqueous solution through the luxuriant daughter activation such as oxygen and is sized mixing, and adsorbs medicament sufficiently with coal slime;Above-mentioned ore pulp After addition foaming agent stirring, flotation unit is fed, bubble is passed through, in the foam by the enrichment of flammable body, inorganic mineral is non-rising, Realize the high efficiente callback of flammable body.
The present invention will be further explained with reference to the accompanying drawings and examples.
The present invention improves the difference of the surface hydrophobicity property of organic matter surface and spoil using hydrogen plasma, and uses oxygen Plasma activates the flotation of conventional collecting agent aqueous solution progress coal slime, the method for realizing plasma fortified coal slime flotation.With It is core that hydrogen plasma, which strengthens the activated reinforced collecting agent collecting ability of delivering dry coal slurry hydrophobicity-oxygen plasma, is realized to coal slime The promotion of flotation effect.
Embodiment: being test coal sample with refreshing eastern low-order coal, moisture < 10% is milled to -0.074mm, and entering floating ash content is 19.77%, impure mineral is mainly quartz, kaolinite etc..
The test of test coal sample direct flotation, flotation conditions have been carried out first are as follows: floatation concentration 80g/l, collecting agent are diesel oil, Dosage 7500g/t, flotation device revolving speed are 1800rpm, and aeration quantity 500ml/min, foaming agent are sec-octyl alcohol, dosage 2500g/t, By a flotation collecting foam and slot bottom product, foam becomes cleaned coal, and slot bottom product is tail coal, the results are shown in Table 1.
1 low-order coal direct flotation result of table
Then using the modified coal slime 5min of hydrogen plasma, and it is mixed with the collecting agent aqueous solution of oxygen plasma activation 5min It closes uniformly, adds foaming agent, inflate, scrape bubble, flotation conditions are as follows: floatation concentration 80g/l, collecting agent are after oxygen plasma activates Diesel oil, dosage 2500g/t, flotation device revolving speed is 1800rpm, aeration quantity 500ml/min, and foaming agent is sec-octyl alcohol, dosage 2500g/t, by a flotation collecting foam and slot bottom product, foam becomes cleaned coal, and slot bottom product is tail coal, the results are shown in Table 2.
The plasma fortified low-order coal flotation results of table 2
By table 1,2 it is found that untreated raw coal, uses diesel oil for collecting agent, in the case where dosage is 7500g/t, cleaned coal is produced Rate has reached 31.45%, cleans ash 7.55%.After the modified coal slime of hydrogen plasma and using oxygen plasma activation Collecting agent flotation, can save 2/3 collector dosage, improve nearly 50 percentage points of clean coal yield.
The above is only a preferred embodiment of the present invention, it should be pointed out that: for the ordinary skill people of the art For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered It is considered as protection scope of the present invention.

Claims (10)

1. a kind of method of the combined reinforced coal slime flotation of hydrogen, oxygen plasma, which is characterized in that comprise the steps of:
Step 1: coal slime feeds hydrogen plasma reaction chamber, with hydrogen plasma haptoreaction;
Step 2: conventional collecting agent is fully dispersed through emulsification in aqueous environment, then feeds oxygen plasma reactor according, with oxygen Plasma haptoreaction;
Step 3: plasma treated coal slime and conventional collecting agent solution feed size mixing device, are sufficiently mixed;
Step 4: after the completion of sizing mixing, the ore pulp of coal slime and conventional collecting agent solution composition feeds flotation unit after foaming agent is added;
Step 5: bubble being added into flotation unit, in the foam by the enrichment of flammable body, realizes flammable body recycling.
2. the method for a kind of hydrogen according to claim 1, the combined reinforced coal slime flotation of oxygen plasma, which is characterized in that The coal slime is delivering dry coal slurry.
3. the method for a kind of hydrogen according to claim 1, the combined reinforced coal slime flotation of oxygen plasma, which is characterized in that Hydrogen plasma producing method has: glow discharge plasma, medium barrier plasma, radio frequency plasma, point discharge Plasma.
4. the method for a kind of hydrogen according to claim 1, the combined reinforced coal slime flotation of oxygen plasma, which is characterized in that Hydrogen plasma reaction chamber is overturning plasm reaction cavity.
5. the method for a kind of hydrogen according to claim 1, the combined reinforced coal slime flotation of oxygen plasma, which is characterized in that Hydrogen plasma gas inflated amount is 30-75L/ (minm in hydrogen plasma reaction chamber2)。
6. the method for a kind of hydrogen according to claim 1, the combined reinforced coal slime flotation of oxygen plasma, which is characterized in that Oxygen plasma producing method is high-voltage tip discharging plasma.
7. the method for a kind of hydrogen according to claim 1, the combined reinforced coal slime flotation of oxygen plasma, which is characterized in that Hydrogen plasma modification time is 5-10min.
8. the method for a kind of hydrogen according to claim 1, the combined reinforced coal slime flotation of oxygen plasma, which is characterized in that The volumetric concentration ratio of hydrogen and argon gas is 3:97 in hydrogen plasma gas.
9. the method for a kind of hydrogen according to claim 1, the combined reinforced coal slime flotation of oxygen plasma, which is characterized in that Oxygen plasma gas aeration quantity is 30L/ (minm in oxygen plasma reactor according2)。
10. the method for a kind of hydrogen according to claim 1, the combined reinforced coal slime flotation of oxygen plasma, which is characterized in that Oxygen plasma modification time is 5-9min.
CN201910788432.6A 2019-08-26 2019-08-26 Method for strengthening coal slime flotation by combining hydrogen and oxygen plasmas Active CN110508403B (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112588428A (en) * 2020-12-10 2021-04-02 宝鸡文理学院 Method for separating PET and PVC based on low-temperature plasma induced flotation
CN113560045A (en) * 2021-06-23 2021-10-29 太原理工大学 Method for enhancing flotation selectivity of coal slime

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JPH0234509A (en) * 1988-07-22 1990-02-05 Noritake Co Ltd Process and apparatus for preparation of polycrystalline diamond by core body floating method
CN108246512A (en) * 2018-01-17 2018-07-06 中国矿业大学 A kind of method of plasma fortified low order coal slime reverse flotation deliming
CN207981432U (en) * 2018-01-19 2018-10-19 中国矿业大学 A kind of hydrocarbon-type oil is modified the device of the preparation miscellaneous Polar Collectors of low order coal slime
CN109896611A (en) * 2017-12-07 2019-06-18 中国石油天然气股份有限公司 The removing method and its device of foam in a kind of beneficiation wastewater

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3208832A1 (en) * 1981-03-11 1982-09-23 Dai-Ichi Togyo Co., Ltd., Tokyo POLYSACCHARIDE AND THEIR USE
JPH0234509A (en) * 1988-07-22 1990-02-05 Noritake Co Ltd Process and apparatus for preparation of polycrystalline diamond by core body floating method
CN109896611A (en) * 2017-12-07 2019-06-18 中国石油天然气股份有限公司 The removing method and its device of foam in a kind of beneficiation wastewater
CN108246512A (en) * 2018-01-17 2018-07-06 中国矿业大学 A kind of method of plasma fortified low order coal slime reverse flotation deliming
CN207981432U (en) * 2018-01-19 2018-10-19 中国矿业大学 A kind of hydrocarbon-type oil is modified the device of the preparation miscellaneous Polar Collectors of low order coal slime

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Title
KUNKUN ZHEN等: "Effect of oxidized diesel oil on the flotation response of the low-rank coal by plasma oxidation method", 《FUEL》 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112588428A (en) * 2020-12-10 2021-04-02 宝鸡文理学院 Method for separating PET and PVC based on low-temperature plasma induced flotation
CN113560045A (en) * 2021-06-23 2021-10-29 太原理工大学 Method for enhancing flotation selectivity of coal slime

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