【摘要】 稀土铁合金作为重要的稀土添加剂，考核稀土铁合金的化学成分的测定具有重要的意义，主要研究稀土铁合金中碳硫含量的测定。在富氧条件下，样品和助熔剂在高频感应炉内耦合，产生涡流并发热，试料在氧气气氛中充分熔融燃烧，碳呈二氧化碳或一氧化碳、硫呈二氧化硫释放出，经除尘净化后，由氧气携带导入红外检测池，经采用红外线吸收器测定二氧化碳和二氧化硫的特征吸收峰，从而得到样品中碳硫的含量。按照试验方法对稀土铁合金中碳硫含量平行测定11次，测定结果的相对标准偏差RSD<7%。同时加入标准样品进行加标回收试验，加标回收率在89.12%～112.50%之间。测定下限小于0.005 0%。检测结果表明，使用高频红外吸收法可以快速、有效的测定出稀土铁合金中碳硫的含量。更多还原

【Abstract】 Rare earth ferroalloy as an important rare earth additive, it is significant that assessing determination of chemical composition of rare earth ferroalloy. mainly studies the determination of carbon and sulfur content in rare earth ferroalloy. Under the oxygen-rich condition, sample and cosolvent have the coupling in the high-frequency induction furnace, which generate eddy current and heat, the sample fully melts and burns in the oxygen-atmosphere, carbon releases as carbon dioxide or carbon monoxide, sulfur releases as sulfur dioxide, then purified by dedusting, passed into infrared detection pool by oxygen, assay the characteristic absorption peak of carbon dioxide and sulfur dioxide by infrared absorber, thus, the content of carbon and sulfur in the sample can be obtained. According to the experimental method, make the parallel determination(11 times) of the content of carbon and sulfur in rare earth ferroalloy, RSD of determined results is less than 7%. proceeding with standard recovery test by adding standard sample, the adding standard recovery is between 89.12%-112.5%. The determination limits is less than 0.005 0%. The test results shows that it is fast and effective to determine the the content of carbon and sulfur in rare earth ferroalloy by high-frequency infrared absorption method.更多还原