摘要
气化渣具有复杂的物理化学特性,其中的无机物及重金属会带来环境污染风险。通过BET、SEM和XRF等表征技术,探讨在最佳分选条件下气化渣中残碳和气化尾渣的物理化学特性变化规律,重点考察重金属在残碳和气化渣尾矿中的分布特征。结果表明,气化细渣和粗渣的平均比表面积分别为122.20 m^(2)/g和41.07 m^(2)/g;在密度为1.60 g/cm^(3)时,细渣的占本级残碳回收率达76.54%,粗渣为42.60%;分选后,残碳组分中重金属含量增加,而气化尾渣中化学组成无明显变化,重金属总量减少。
Gasification residue has complex physical and chemical properties,among which inorganic substances and heavy metals will bring environmental pollution risk.By means of BET,SEM and XRF characterization techniques,the physical and chemical characteristics of carbon residue and gasification tailings in the optimal separation conditions were discussed,with emphasis on the distribution of heavy metals in carbon residue and gasification tailings.The results show that the average specific surface area of fine residue and coarse residue is 122.20 m^(2)/g and 41.07 m^(2)/g,respectively.When the density is 1.60 g/cm^(3),the carbon recovery rate of fine residue is 76.54%and that of coarse residue is 42.60%.After separation,the content of heavy metals in carbon residue increased,while the chemical composition of gasification tailings did not change significantly,but the total amount of heavy metals decreased.
作者
何丽君
杨汉钊
卫中宽
王常艳
刘东方
HE Li-jun;YANG Han-zhao;WEI Zhong-kuan;WANG Chang-yan;LIU Dong-fang(China Coal(Tianjin)Underground Engineering Intelligent Research Institute Co.,Ltd.,Tianjin 300131,China;College of Environmental Science and Engineering,Nankai University,Tianjin 300350,China)
出处
《煤炭加工与综合利用》
CAS
2024年第9期33-37,共5页
Coal Processing & Comprehensive Utilization
基金
中国中煤能源集团有限公司重点科技项目(2024-TJDT-KYZC-001)。
关键词
煤气化渣
微观表征
残碳
重金属
coal gasification residue
microscopic characterization
residual carbon
heavy metal
