摘要
按照标准GB/T 1596–2005中方法检测粉煤灰烧失量,发现存在检测结果为负值的现象,为了解释该现象,完善针对该类粉煤灰烧失量的检测方法,以及给出该检测方法的适用条件,分别按照标准GB/T 176-2008和GB6730.8–1986对灼烧[(950±25)℃]前后粉煤灰中硫化物和亚铁含量进行测定,同时对灼烧后粉煤灰的颜色不同进行分析。结果表明,粉煤灰中亚铁是引起粉煤灰烧失量为负值的主要原因,亚铁含量与灼烧后粉煤灰颜色有一定相关性,对于灼烧后为红棕色的粉煤灰,应对灼烧前粉煤灰中亚铁含量进行测定,视其对烧失量的影响程度,决定是否对烧失量进行校正。
According to the standard GB/T 1596–2005, the negative phenomenon of coal ash's ignition loss was found. In order to explain this phenomenon and improve the determination method of the ignition loss and provide the applicable conditions of the determination method, the sulfide and ferrous iron content in the original and burned coal ash on(950±25)℃ were determined based on the standard GB/T 176–2008 and GB 6730.8–1986, and the different colors of burned coal ash were analyzed. The results showed that the ferrous iron in coal ash was the main reason for negative of ignition loss, and there were a correlation between ferrous iron content and colors of the burned coal ash. After burning, the ferrous iron content of the red-brown coal ash should be tested and the decision of correction could depend on the ignition loss' error from the ferrous iron content.
出处
《化学分析计量》
CAS
2016年第3期34-36,共3页
Chemical Analysis And Meterage
基金
安徽省.水利部淮委水利科学研究院青年科技创新基金项目(KY201404)
关键词
粉煤灰
烧失量
硫化物
亚铁含量
coal ash
ignition loss
sulfide
ferrous iron content
