CN108018108A - A kind of method for improving lignite microwave absorbing property using high sulfur coal gangue - Google Patents

A kind of method for improving lignite microwave absorbing property using high sulfur coal gangue Download PDF

Info

Publication number
CN108018108A
CN108018108A CN201711405086.6A CN201711405086A CN108018108A CN 108018108 A CN108018108 A CN 108018108A CN 201711405086 A CN201711405086 A CN 201711405086A CN 108018108 A CN108018108 A CN 108018108A
Authority
CN
China
Prior art keywords
lignite
high sulfur
coal gangue
sulfur coal
microwave
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201711405086.6A
Other languages
Chinese (zh)
Inventor
刘祥春
崔平
赵志刚
谢润伦
柯清平
凌强
雷昭
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Anhui University of Technology AHUT
Original Assignee
Anhui University of Technology AHUT
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Anhui University of Technology AHUT filed Critical Anhui University of Technology AHUT
Priority to CN201711405086.6A priority Critical patent/CN108018108A/en
Publication of CN108018108A publication Critical patent/CN108018108A/en
Pending legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L9/00—Treating solid fuels to improve their combustion
    • C10L9/08—Treating solid fuels to improve their combustion by heat treatments, e.g. calcining
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L9/00—Treating solid fuels to improve their combustion
    • C10L9/10—Treating solid fuels to improve their combustion by using additives

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Solid Fuels And Fuel-Associated Substances (AREA)

Abstract

The present invention discloses a kind of method for improving lignite microwave absorbing property using high sulfur coal gangue, belongs to lignite dehydration upgrading field.The microwave absorbing property for improving lignite is to improve the necessary condition of lignite dehydration upgrading effect, this method is after mixing in proportion microwave absorption high sulfur coal gangue and lignite, the granularity of high sulfur coal gangue is more than lignite, it is positioned over processing in microwave reactor, then varigrained high sulfur coal gangue and lignite are separated using sieve method, high sulfur coal gangue recycling Posterior circle uses.The lignite microwave absorbing property of high sulfur coal gangue additive is added compared to raw coal substantially to be increased.The present invention has the characteristics that easy to operate, environmental protection and economy, high sulfur coal gangue are cheap and is easy to recycling, while can be obviously improved lignite microwave-absorbing by the present invention, reduce further microwave drying cost.

Description

A kind of method for improving lignite microwave absorbing property using high sulfur coal gangue
Technical field：
The invention belongs to lignite dehydration upgrading field, relates in particular to a kind of using containing microwave absorption troilite High sulfur coal gangue additive improves lignite microwave absorbing property so as to improving dehydration upgrading effect of the microwave to lignite.
Background technology：
In China, the proportion that coal accounts for energy-consuming remains high always, and 60% is all higher than in its value last decade.Hard coal quilt Exhaustive exploitation and utilization, what coal in China was exploited in addition moves westwards, and the yield of lignite is higher and higher.The high-moisture of lignite is to influence it " bottleneck " of effective trans-utilization, seriously restricts its economic benefit and competitiveness.In order to clean, lignite resource is efficiently utilized, Reduce using cost and be modified, it is necessary to carry out dehydration upgrading to lignite.Microwave drying has selectivity, penetrability, instantaneity and is The advantages that when property, make its receive much concern (see paper " tin alliance lignite Characteristics of Microwave Drying experimental study ", [J] thermal power generations, 2017,46 (10)：41-46).But the effect of microwave dehydration upgraded brown coal and bad, this is because lignite is microwave-absorbing Can not it is high (see paper " additive on lignite thin layer Characteristics of Microwave Drying influence ", [J] Engineering Thermophysics journals, 2016,37 (5)：947-951, and paper " Combustion performance of Loy Yang lignite treated using Microwave irradiation treatment ", [J] .Thermochimica Acta, 2016,642:81-87).
Gangue is the black rock mined with discharged during coal washing, is generally regarded as Resourcization of Mining Solid Waste and throws aside, no Only take up tract and also pollute environment.The main valuable mineral contained in high sulfur coal gangue is troilite and coal.Troilite has It is microwave-absorbing (see document " Comparison between the effect of microwave well irradiation and conventional heat treatments on the magnetic properties of Chalcopyrite and pyrite ", [J] .Advanced Powder Technology, 2016,27 (6)：2424- 2431).Therefore it is added to using high sulfur coal gangue as microwave absorption in lignite, the microwave that so can not only increase lignite is inhaled Receive performance, improve lignite microwave dehydration upgrading effect, but also can realize the comprehensive utilization of high sulfur coal gangue, reach protection ring Border, the purpose to turn waste into wealth.
The content of the invention：
The present invention is to improve the effect of lignite microwave dehydration upgrading, there is provided one kind improves lignite microwave using high sulfur coal gangue The method of absorbent properties.The method of the present invention comprises the following steps that：
(1) high sulfur coal gangue and lignite are obtained into high sulfur coal gangue and lignite mixture, the sulphur coal after mixing The mass ratio of spoil and the lignite is 1-10%, and the particle diameter of the high sulfur coal gangue is more than the particle diameter of the lignite.
(2) under nitrogen atmosphere, by step (1) high sulfur coal gangue and lignite mixture be placed in microwave reactor into Row processing, microwave power 500-900W, microwave treatment time 5-9min；Microwave treatment lignite coal is measured using radiation thermometer The temperature of sample, temperature is higher, and explanation microwave absorption effect is better.
(3) mixture after step (2) microwave treatment is separated by sieve method, wherein the high sulfur coal gangue recycled can Recycle.
The present invention does additive using the high sulfur coal gangue containing microwave absorption troilite, and high sulfur coal gangue is usually worked as Thrown aside as Resourcization of Mining Solid Waste.Its microwave absorbing property of the lignite coal sample of addition high sulfur coal gangue additive significantly improves.
Compared with prior art, the present invention has following technique effect：
1st, the high sulfur coal gangue containing microwave absorption troilite used in the present invention can significantly improve the micro- of lignite Ripple absorbent properties, so as to further reduce microwave drying cost.
2nd, the present invention than existing methods there is rapid reaction, microwave drying efficiency to significantly improve, is easy to operate, is easily controllable The characteristics of.
3rd, the present invention realizes waste resource recycling, and high sulfur coal gangue can be recycled, and effectively increase process Economy.
Embodiment：
The present invention is described in detail below in conjunction with specific embodiment, but the present invention is not limited to following embodiments.
Embodiment 1：Weigh 0.96g high sulfur coal gangues (particle diameter 1-1.17mm) and 12g lignite (particle diameter ＜ 0.84mm) mixes Afterwards as in microwave reactor, 900W handles 5min under nitrogen atmosphere, it turns out that coal sample final temperature is improved than raw coal 23%.
Embodiment 2：Weigh 0.96g high sulfur coal gangues (particle diameter 1-1.17mm) and 12g lignite (particle diameter ＜ 0.84mm) mixes Afterwards as in microwave reactor, 900W handles 7min under nitrogen atmosphere, it turns out that coal sample final temperature is improved than raw coal 43%.
Embodiment 3：Weigh 0.96g high sulfur coal gangues (particle diameter 1-1.17mm) and 12g lignite (particle diameter ＜ 0.84mm) mixes Afterwards as in microwave reactor, 900W handles 9min under nitrogen atmosphere, it turns out that coal sample final temperature is improved than raw coal 58%.
Embodiment 4：Weigh 0.96g high sulfur coal gangues (particle diameter 1-1.17mm) and 12g lignite (particle diameter ＜ 0.84mm) mixes Afterwards as in microwave reactor, 700W handles 9min under nitrogen atmosphere, it turns out that coal sample final temperature is improved than raw coal 44%.
Embodiment 5：Weigh 0.96g high sulfur coal gangues (particle diameter 1-1.17mm) and 12g lignite (particle diameter ＜ 0.84mm) mixes Afterwards as in microwave reactor, 500W handles 9min under nitrogen atmosphere, it turns out that coal sample final temperature is improved than raw coal 25%.
Embodiment 6：After weighing 0.6g high sulfur coal gangues (particle diameter 1-1.17mm) and 12g lignite (particle diameter ＜ 0.84mm) mixing As in microwave reactor, 900W handles 9min under nitrogen atmosphere, it turns out that coal sample final temperature improves 38% than raw coal.
Embodiment 7：Weigh 0.12g high sulfur coal gangues (particle diameter 1-1.17mm) and 12g lignite (particle diameter ＜ 0.84mm) mixes Afterwards as in microwave reactor, 900W handles 9min under nitrogen atmosphere, it turns out that coal sample final temperature is improved than raw coal 26%.
Embodiment 8：After weighing 1.2g high sulfur coal gangues (particle diameter 1-1.17mm) and 12g lignite (particle diameter ＜ 0.84mm) mixing As in microwave reactor, 900W handles 9min under nitrogen atmosphere, it turns out that coal sample final temperature improves 79% than raw coal.

Claims (1)

  1. A kind of 1. method for improving lignite microwave absorbing property using high sulfur coal gangue, it is characterised in that this method specific steps are such as Under：
    (1) high sulfur coal gangue and lignite are obtained into high sulfur coal gangue and lignite mixture, the high sulfur coal gangue after mixing Mass ratio with the lignite is 1-10%, and the particle diameter of the high sulfur coal gangue is more than the particle diameter of the lignite；
    (2) under nitrogen atmosphere, step (1) described high sulfur coal gangue is placed in microwave reactor with lignite mixture and is located Reason, microwave power 500-900W, microwave treatment time 5-9min；
    (3) mixture after step (2) microwave treatment is separated by sieve method, wherein the high sulfur coal gangue recycled can circulate Use.
CN201711405086.6A 2017-12-22 2017-12-22 A kind of method for improving lignite microwave absorbing property using high sulfur coal gangue Pending CN108018108A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201711405086.6A CN108018108A (en) 2017-12-22 2017-12-22 A kind of method for improving lignite microwave absorbing property using high sulfur coal gangue

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201711405086.6A CN108018108A (en) 2017-12-22 2017-12-22 A kind of method for improving lignite microwave absorbing property using high sulfur coal gangue

Publications (1)

Publication Number Publication Date
CN108018108A true CN108018108A (en) 2018-05-11

Family

ID=62074354

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201711405086.6A Pending CN108018108A (en) 2017-12-22 2017-12-22 A kind of method for improving lignite microwave absorbing property using high sulfur coal gangue

Country Status (1)

Country Link
CN (1) CN108018108A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111040821A (en) * 2019-12-25 2020-04-21 河海大学 Method for selecting carbon-containing material additive to influence properties of liquid product subjected to microwave dehydration and upgrading of lignite
CN111059866A (en) * 2019-12-25 2020-04-24 河海大学 Method for promoting microwave dehydration process of lignite by selecting cationic additive

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101569784A (en) * 2009-06-08 2009-11-04 昆明理工大学 Method for detoxicating chromium residue by utilizing coal refuse through microwave
CN102517058A (en) * 2012-01-09 2012-06-27 河南理工大学 Method for improving microwave pyrolysis rate of low-rank coal
CN203148165U (en) * 2013-02-17 2013-08-21 中国神华能源股份有限公司 Drying device
US20150075326A1 (en) * 2011-04-15 2015-03-19 Biogenic Reagent Ventures, Llc High-carbon biogenic reagents and uses thereof

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101569784A (en) * 2009-06-08 2009-11-04 昆明理工大学 Method for detoxicating chromium residue by utilizing coal refuse through microwave
US20150075326A1 (en) * 2011-04-15 2015-03-19 Biogenic Reagent Ventures, Llc High-carbon biogenic reagents and uses thereof
CN102517058A (en) * 2012-01-09 2012-06-27 河南理工大学 Method for improving microwave pyrolysis rate of low-rank coal
CN203148165U (en) * 2013-02-17 2013-08-21 中国神华能源股份有限公司 Drying device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111040821A (en) * 2019-12-25 2020-04-21 河海大学 Method for selecting carbon-containing material additive to influence properties of liquid product subjected to microwave dehydration and upgrading of lignite
CN111059866A (en) * 2019-12-25 2020-04-24 河海大学 Method for promoting microwave dehydration process of lignite by selecting cationic additive

Similar Documents

Publication Publication Date Title
Tao et al. Progress of the technique of coal microwave desulfurization
Hu et al. The fate of sulfur during rapid pyrolysis of scrap tires
Gai et al. Effect of inherent and additional pyrite on the pyrolysis behavior of oil shale
CN106755981B (en) Method for producing metallized pellets by using iron ore tailings
Ju et al. Microwave pyrolysis and its applications to the in situ recovery and conversion of oil from tar-rich coal: An overview on fundamentals, methods, and challenges
Wang et al. Pyrolysis kinetic study of Huadian oil shale, spent oil shale and their mixtures by thermogravimetric analysis
CN106540801B (en) A kind of method that magnetizing roast magnetic separation is carried out to red mud
Long et al. TG–FTIR analysis of pyrolusite reduction by major biomass components
Jorjani et al. Ultra clean coal production by microwave irradiation pretreatment and sequential leaching with HF followed by HNO3
Mesroghli et al. Evaluation of microwave treatment on coal structure and sulfur species by reductive pyrolysis-mass spectrometry method
CN108018108A (en) A kind of method for improving lignite microwave absorbing property using high sulfur coal gangue
CN101879599B (en) Method for preparing reductive iron powder and high-purity refined iron powder by using iron ores
US11959153B2 (en) Production of iron
CN108531719B (en) High-phosphorus iron ore suspension state oxidation-reduction roasting-acid leaching dephosphorization method
CN110317949B (en) Preparation method of zinc-containing dust pellets
Guo et al. A comparison study on the deoxygenation of coal mine methane over coal gangue and coke under microwave heating conditions
Behera et al. Demineralization mechanism and influence of parameters on high ash Indian coal by chemical leaching of acid and alkali solution
CN110355190A (en) A kind of paint slag resource utilization process
Zhao et al. Basic research on the microwave absorbing properties and microwave roasting mechanism of stibnite concentrate
CN104098099A (en) Method utilizing waste carbon-containing pellets to smelt silicon
CN103878031B (en) A kind of oil shale pyrolysis Catalysts and its preparation method and using method
Li et al. Synergistic effects during pyrolysis of binary mixtures of biomass components using microwave-assisted heating coupled with iron base tip-metal
WO2023044840A1 (en) Low-energy-consumption method for producing potassium calcium magnesium phosphate fertilizer
Gui et al. Microwave drying method investigation for the process and kinetics of drying characteristics of zinc-leaching residue
Chen et al. Sewage sludge enhances cold-pressed pelletization and carbothermic reduction of steel plant sintering dust

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication
RJ01 Rejection of invention patent application after publication

Application publication date: 20180511