摘要
以低变质粉煤为主要原料,以煤直接液化残渣(DCLR)为黏结剂,利用成型热解技术成功制备出性能优良的型焦产品,采用红外分析及扫描电镜(SEM)分析对型焦进行表征,主要考察液化残渣加入量对型焦抗压强度的影响.研究表明,随着去灰后的煤直接液化残渣(D-DCLR)添加比例的增加,热解焦油和煤气的产率逐渐增大,而型焦的抗压强度先增加后减小,当其添加量为40%时,抗压强度出现了一个最大值573.3N/ball.热解过程中胶质体的含量、挥发分的大量析出以及灰分的增加是型焦抗压强度变化的主要影响因素.
In this paper,formed coke with excellent quality was successfully prepared by briquetting pyrolysis technology,in which low rank coal and direct coal liquefaction residue（DCLR）were adopted as main raw material and additive separately.The composition and structure of formed coke were characterized by FTIR and SEM,and the effect of the proportion of DCLR on the compressive strength of formed coke was investigated.The results indicated that formed coke＇s compressive strength increased first and then decreased with the proportion increase of DCLR.The compressive strength reached its maximum 573.3N/ball as the proportion of D-DCLR increased to 40%,which was mainly attributed to the proportion increase of both the ash and colloidal matter.
出处
《煤炭转化》
CAS
CSCD
北大核心
2014年第3期58-61,共4页
Coal Conversion
基金
国家高技术研究发展计划(863)项目(2011AA05A202)
陕西省科技统筹计划项目(2011KTDZ01-05-01/05)
关键词
低变质煤
煤直接液化残渣
胶质体
型焦
抗压强度
low rank coal
direct coal liquefaction residue
colloidal matter
formed coke
compressive strength
