煤气化渣分选前后物理化学特性研究
Research on the physical and chemical properties and sorting effect of coal gasification residue
何丽君 1杨汉钊 2卫中宽 1王常艳 2刘东方2
作者信息
- 1. 中煤(天津)地下工程智能研究院有限公司,天津 300120
- 2. 南开大学 环境科学与工程学院,天津 300350
- 折叠
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 m2/g和41.07 m2/g;在密度为 1.60 g/cm3 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.
Abstract
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 m2/g and 41.07 m2/g,respectively.When the density is 1.60 g/cm3,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.
关键词
煤气化渣/微观表征/残碳/重金属Key words
coal gasification residue/microscopic characterization/residual carbon/heavy metal引用本文复制引用
出版年
2024
NETL
NSTL
万方数据