配煤炼焦过程中的炭化行为研究
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摘要
文章采用四种典型炼焦煤种进行配煤炼焦,研究在炼焦过程中煤的炭化行为。利用XRD、TG等技术手段,通过混煤在结焦过程中的结构分析和热解分析,得出煤在炼焦过程中的炭化规律如下:(1)在结焦的炭化过程中,微晶的堆砌度和延展度得到了提升;(2)在380～600℃之间,焦煤发生的物理化学变化最强烈,分解速率最快;(3) 900℃之后,生成结构性质稳定的焦炭。
Four kinds of typical coking coal were used for coal-blending coking. The carbonization characteristics of blending coal in the process of coking was studied. According to the structure and pyrolysis of blending coal by XRD and TG,the carbonization characteristics of blending coal in coking process were obtained and the carbonization rules were as follows:(1) The degree of stacking and extension of microcrystal structure increased in the process of carbonization;( 2) Between 380 and600℃,the physical and chemical changes of coal were strongest and the decomposition rate was fastest;(3) The structural properties of coke were the most stable at 900℃.
Four kinds of typical coking coal were used for coal-blending coking. The carbonization characteristics of blending coal in the process of coking was studied. According to the structure and pyrolysis of blending coal by XRD and TG,the carbonization characteristics of blending coal in coking process were obtained and the carbonization rules were as follows:(1) The degree of stacking and extension of microcrystal structure increased in the process of carbonization;( 2) Between 380 and600℃,the physical and chemical changes of coal were strongest and the decomposition rate was fastest;(3) The structural properties of coke were the most stable at 900℃.
引文
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[8]武建军,周国莉,高志远等.半焦制铸造型焦的碳微晶结构X-衍射分析[J].煤炭学报,2009,34(12):1693-1696.
[9]郭云飞.煤焦混合成型及成型焦气化反应特性研究[D].太原:太原理工大学,2016.
[10]王琪.大尺寸型煤炭化过程收缩特性及动力学研究[D].太原:太原理工大学,2015.
[11]郭爱萍.宁东煤的热解过程分析[D].银川:宁夏大学,2013.
[12]郭慧卿,谢丽丽,董雪松等.热重法研究介休煤的热解与燃烧特性[J].广州化工,2014,42(5):40-43.
[2]杨明平,彭荣华,文杰强等.焦粉配煤炼焦的研究[J].煤炭科学技术,2003,31(11):7-10.
[3]武晨晓.东庞煤矿高硫煤配煤炼焦的研究与应用[J].洁净煤技术,2013,19(1):61-64.
[4]季斌,位革老,张凤桐等.气煤配煤炼焦对焦炭热性质及孔结构的影响[J].煤炭科学技术,2015,43(5):139-143.
[5]张永发,张慧荣,田芳等.无烟粉煤成型块炭化行为及热解气体生成规律[J].煤炭学报,2011,36(4):670-675.
[6]田永胜,王光辉,曾丹林等.煤的变质程度对焦炭性质影响的研究[J].煤炭转化,2010,33(1):37-39,43.
[7]黄胜,吴幼青,吴诗勇等.高温气相炭化焦的物理结构及CO2气化活性[J].华东理工大学学报(自然科学版),2011,37(1):26-31.
[8]武建军,周国莉,高志远等.半焦制铸造型焦的碳微晶结构X-衍射分析[J].煤炭学报,2009,34(12):1693-1696.
[9]郭云飞.煤焦混合成型及成型焦气化反应特性研究[D].太原:太原理工大学,2016.
[10]王琪.大尺寸型煤炭化过程收缩特性及动力学研究[D].太原:太原理工大学,2015.
[11]郭爱萍.宁东煤的热解过程分析[D].银川:宁夏大学,2013.
[12]郭慧卿,谢丽丽,董雪松等.热重法研究介休煤的热解与燃烧特性[J].广州化工,2014,42(5):40-43.