石灰石和灰化温度对燃煤中重金属固定率影响的实验研究

摘要

文章探究了石灰石的添加量和灰化温度对燃煤中重金属元素Zn、 Cu、 Cd固定率的影响。结果表明，随着石灰石比例的增加， Zn、 Cu、 Cd的固定率呈上升趋势，变化量大小为Cd＞Zn＞Cu；随着温度的升高， Zn、 Cu、 Cd的固定率先上升后下降，900℃时的固定效果要优于800℃和1000℃。%Experiments with the addition of limestone and the change of ashing temperature were car-ried out.Its aim is to explore the influence of limestone and ashing temperature on the deposit of Zn, Cu, and Cd in ash.The results show that there exists a positive correlation between the addition of limestone and the element-fixed amount of Zn, Cu, Cd in ash.The size of variation Cd>Zn>Cu. With the increase of temperature, the element-fixed content rise in the first then fall.Ashing temper-ature 900℃gave a better result than 800℃, 1000℃for the deposit of Zn, Cu, Cd.