摘要
选择一种山西肥煤（YX）、新西兰1/3焦煤（NXL）和一种山西焦煤（JX）为研究对象,模拟工业炼焦条件,在水平管式炉中制备了300℃～1 000℃的半焦,用化学分析法分析了原煤及不同温度下半焦中的形态硫含量的变化,并用XRD考察了热解过程中煤中硫铁矿晶型的转变.结果表明,三种煤中的全硫都随热解温度的升高而降低,随着变质程度的升高,全硫降低最大的温度区间向高温偏移.除YX外,其他两种煤中的硫酸盐硫随温度的变化不明显；三种煤中的硫铁矿先分解成FeS1-x,当温度超过600℃,FeS1-x进一步分解为FeS；三种煤中的有机硫变化无明显的规律.
In order to research on the sulfur forms transformation of high-sulfur content coking coal during pyrolysis,char of a Shanxi fat coal（YX）,a Shanxi coking coal（JX） and a New Zealand 1/3 coking coal （NXL） were prepared under simulation of industrial coking conditions in horizontal tube furnace during 300 ℃-1000 ℃.The change of sulfur forms content and crystal structure transformation of pyrite were investigated by wet chemical method and XRD,respectively.The results show that the total sulfur content decreases with pyrolysis temperature increases,and with the increase of metamorphic grade,the temperature of maximum desulfuration shifts to high temperature.Sulfate sulfur content in NXL and JX coal does not change significantly with temperature except for the YX.Pyrite in three kinds of coal are first decomposed into pyrrhotite,with the temperature rise further,pyrite decomposed into troilite completely,and change of the content of organic sulfur in coal is not regulated.
出处
《煤炭转化》
CAS
CSCD
北大核心
2013年第4期41-45,共5页
Coal Conversion
基金
国家自然科学基金资助项目(21276156)
关键词
炼焦煤
热解
硫迁移
XRD
coking coal
pyrolysis
sulfur transformation
XRD
