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在管式炉上进行徐州烟煤的燃烧试验,采用电感耦合等离子体光谱质谱联用仪(ICP-MS)对燃烧剩余灰渣进行测定.研究了不同温度和不同燃烧气氛(空气气氛和O_2/CO_2气氛)下痕量元素的迁移特性.结果表明,煤燃烧过程中,痕量元素Cr、Mn、Ni、Zn、Cd、Pb在灰渣中富集,As挥发率达70%以上.随着温度的升高,大部分痕量元素在灰渣中的含量降低,Mn、Ni、Cr在灰渣中的含量相对比较稳定.O_2/CO_2气氛下,各元素随温度的变化趋势并未受到影响,但整体上O_2/CO_2气氛下各痕量元素在灰渣中的含量要大于空气气氛下的,随着温度的升高,O_2/CO_2气氛和空气气氛下痕量元素在灰渣中的含量越来越接近,说明燃烧气氛对痕量元素迁移的影响随温度升高而减弱.“,”On a tubular boiler,conducted was a combustion test of Xuzhou-originated bituminous coal and determined were the ash slag remnants from combustion by using an inductively coupled plasma-mass spectrometer (ICP-MS).The migration characteristics of trace elements were studied under various temperatures and combustion atmospheres (including air and O_2/CO_2 atmosphere).The research results show that during the coal combustion process,such trace elements as Cr,Mn,Ni,Zn,Cd and Pb become enriched in the ash slag,and the As volatilization rate is over 70%.With an increase of temperature,the contents of the majority of trace elements in the ash slag will decrease.However,the contents of Mn,Ni and Cr in the ash slag are relatively stable.In an O_2/CO_2 atmosphere,the changing tendency of various elements with temperature was not affected.In the O_2/CO_2 atmosphere,as a whole,the contents of various trace elements in the ash slag are greater than those in air atmosphere.With an increase of temperature,the above-mentioned contents in the O_2/CO_2 atmosphere are more and more close to those in the air atmosphere,indicating that the influence of the combustion atmosphere on the migration of trace elements is weakened with an increase of temperature.