Abstract：Rare earth ferroalloy as an important rare earth additive, it is significant that assessing determination of chemical composition of rare earth ferroalloy. This paper 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, the RSD of determined results is <7%. proceeding with standard recovery test by adding standard sample, the adding standard recovery is between 89.12-112.5%. The determination limits is <0.0050%. 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.
2022, Vol. 29 