热电动势法快速测定微碳铬铁中硅含量  

Quick Determination of Silicon Content in Low-Carbon Ferrochrom by Means Of TEMF

作　　者：梁连科[1] 杨怀[1] 孙国会[1] 郭仲文[1] 霍乃礼 

机构地区：[1]东北大学,吉林铁合金厂

出　　处：《东北大学学报（自然科学版）》1994年第5期468-470,共3页Journal of Northeastern University(Natural Science)

摘　　要：用热电动势法快速测定了微碳铬铁中硅含量．当冷热端温度差为２８０℃和黄铜为参比极时，热电动势Ｅ＿ｔ与待测极微碳铬铁中硅含量［％Ｓｉ］间有如下关系：Ｅ＿ｔ＝１４．２３８—０．５８２［％Ｓｉ］，ｍＶ．其测量精度与化学法和光谱法相比．分别为±０．０４％Ｓｉ和±０．０２８％Ｓｉ．每次测试时间为３０ｓ．The silicon content in low-carbon ferrochrom can be determined quickly by means of thermal electromotive force,i. e. TEMF. The results show that the relationship between thermal TEMF and silicon content is Et= 14. 238- 0. 582[%Si], mV,where the temperature difference between hot and cold ends, (t1 t0),is defined as 280℃ and that the reference electrode is made of brass with low carbon ferrochrom the working electrode. The accruacies by this method and by chemical spectrographic analysis are 0.04% Si and 0. 028% Si,respectively. Time required for each determination is 30 seconds.

关 键 词：热电动势法 铬铁 测定 硅 熔炼 

分 类 号：TF641[冶金工程—钢铁冶金]