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[1]魏 博,谭厚章,王学斌,等.煤燃烧过程中复杂气氛下的灰熔融特性[J].燃烧科学与技术,2017,(04):320-324.[doi:DOI 10.11715/rskxjs.R201703027]
 Wei Bo,Tan Houzhang,Wang Xuebin,et al.Ash Fusion Characteristics Under Complex Atmospherein Coal Combustion Process[J].Journal of Combustion Science and Technology,2017,(04):320-324.[doi:DOI 10.11715/rskxjs.R201703027]
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煤燃烧过程中复杂气氛下的灰熔融特性()
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《燃烧科学与技术》[ISSN:1006-8740/CN:12-1240/TK]

卷:
期数:
2017年04
页码:
320-324
栏目:
出版日期:
2017-08-15

文章信息/Info

Title:
Ash Fusion Characteristics Under Complex Atmosphere in Coal Combustion Process
作者:
魏 博谭厚章王学斌杨 涛韩瑞午阮仁晖
西安交通大学热流科学与工程教育部重点实验室,西安 710049
Author(s):
Wei BoTan HouzhangWang XuebinYang TaoHan RuiwuRuan Renhui
Key Laboratory of Thermo-Fluid Science and Engineering of Ministry of Education, Xi’an Jiaotong University,Xi’an 710049,China
关键词:
高铁煤还原性气氛灰熔融特性物相变化
Keywords:
high iron coalreducing atmosphereash fusion characteristicsminerals transformation
分类号:
TK16
DOI:
DOI 10.11715/rskxjs.R201703027
文献标志码:
A
摘要:
针对煤燃烧过程中复杂气氛下灰熔融特性,开发了气氛可控的灰熔融特性测试平台,研究了反应气氛对 两种不同Fe 含量的煤样灰熔融特性的影响;在不同气氛的高温(1,100,℃)条件下制取灰样,并采用XRD(X 射线 衍射)分析,获得不同气氛下矿物演变的规律.结果表明,在空气中O2转化为CO2的过程中,灰熔点基本不变; 在N2、CO 和CO2体积分数分别为80%,、5%,和15%,的弱还原性气氛时,灰熔点大幅度降低,高铁煤降低更为明 显;当气氛的还原性继续增强,灰熔点反而上升.在弱还原性气氛下含Fe 矿物被还原,形成了低熔点Fe2+化合 物,是弱还原性气氛下灰熔点降低的主要原因,而在强还原性气氛下Fe2+化合物继续被还原为Fe 单质,使灰熔 点上升.
Abstract:
Focusing on the ash fusion characteristics under complex atmosphere during coal combustion,an atmosphere- controllable ash fusion characteristics test system was developed.The effects of reacting atmospheres on ash fusion characteristics were studied.Then,the ashes which were prepared at high temperature (1,100,℃)under different atmosphere were analyzed by XRD(X-Ray Diffractioin)to determine the compounds.The results indicated that the ash fusion points remained unchanged in the transformation process of O2 into CO2.The ash fusion points declined significantly under the weak reducing atmosphere (?(N2)∶?(CO)∶?(CO2)=80%∶5%∶ 15%).The variation of ash fusion point of high iron content coal was more obvious.The ash fusion points increased when the reducing atmosphere was enhanced.Under the weak reducing atmosphere,the ash fusion points were lowest because the Fe contained compounds were reduced to Fe2+contained compounds with lower melting temperatures.However,the formed Fe2+contained compounds were further reduced to elemental iron,thus increasing the ash fusion point.

备注/Memo

备注/Memo:
收稿日期:2017-01-23. 基金项目:国家自然科学基金资助项目(51376147,91544108,51306142). 作者简介:魏 博(1985— ),男,博士研究生,weiboxju@163.com. 通讯作者:谭厚章,男,博士,教授,Tanhz@xjtu.edu.cn.
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