摘要
作为煤助燃剂的煤粉具有降低高炉煤炭着火温度,提高煤炭使用率的作用。为了满足对煤助燃剂化学成分的准确测定要求,建立了以电感耦合等离子体原子发射光谱法(ICP-AES)测定煤粉助燃剂中Ca,Mn,Mg,K,Na,La,Ce含量的方法。试样采用硝酸、氢氟酸和高氯酸溶解,选择Ca 183.801nm、Mn 293.306nm、Mg 285.213nm、K 766.491nm、Na 328.560nm、La 398.852nm、Ce 418.660nm作为分析线,以加入背景试剂的校准溶液制作校准曲线,在功率为1 150W、雾化器压力为32.0psi、辅助气流量为1.0L/min和泵速为100r/min的条件下测定,测定结果(以氧化物表示)的相对标准偏差≤1.7%,加标回收率在98.4%～101.2%之间。
The pulverized coal as coal combustion can reduce ignition temperature of coal in blast furnace and increase the utilization of coal.In order to meet the accurate measurement requirement of coal combustion,a method for determining Ca,Mn,Mg,K,Na,La,Ce in pulverized coal by inductively coupled plasma atomic emission spectrometry（ICP-AES） was established.The sample was dissolved in nitric acid,hydrochloric acid and perchloric acid.The spectral lines of Ca 183.801 nm,Mn 293.306 nm,Mg 285.213 nm,K 766.491 nm,Na 328.560 nm,La 398.852 nm and Ce 418.660 nm were selected as analytical lines,The standard solution with background reagents was used as calibration curve plotting.The sample was determined under the power of 1 150 W,nebulizer pressure of 32.0 psi,auxiliary gas flow of 1.0 L/min and pump speed of 100 r/min,with RSD（shown as oxide） less than 1.7 % and recoveries of 98.4%-101.2%.
出处
《冶金分析》
CAS
CSCD
北大核心
2013年第5期67-71,共5页
Metallurgical Analysis
