炼钢用辅料中氮元素检测

Detection of Nitrogen Content in Auxiliary Materials for Steelmaking

随着生产控制要求的提高,氮元素检测在钢铁冶炼中的重要性愈发体现。常用的热导法检测氮元素虽有准确度高、分析时长短的优点,但也存在检测费用高的缺点。通过对多种炼钢原辅料进行试验,初步确定了凯氏法定氮的试样消解方法、碱液用量。对比凯氏法和热导法定氮的检测结果,二者基本一致,可用凯氏法代替热导法用于炼钢原辅料定氮。

With the increasing of production control requirements, the importance of detecting nitrogen content in iron and steel smelting increases greatly. Although detection of nitrogen content with thermal conductivity method has the advantage of high accuracy and short analysis time, it still suffers from high testing cost. In this paper, detection of nitrogen content was carried out by using Kjeldahl method. The method of sample digestion, as well as addition amount of alkali, was determined by testing various raw materials for steelmaking. Detection results of Kjeldahl method and the thermal conductivity method were analyzed and compared. The results show that detection results of these two methods are basically coincident, so Kjeldahl method can replace the thermal conductivity method to detect nitrogen content in raw materials for steelmaking.