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一、引言我厂苯菲尔脱碳系统1977年因局部腐蚀,造成脱碳系统污染,溶液浊度变大,给化学分析带来很大困难,尤其是采用比色分析的项目,无法报出准确的结果。原来的光度法测钒,空白采用蒸馏水加试剂(国内同类型厂采用化验室自配的空白相似液),由于溶液浑浊呈现灰绿色,测定消光值时,空白抵消不了溶液颜色带来的消光值,造成测钒结果偏高。在溶液最浑浊时,钒的结果高达V总(以V_2O_5计)1.30％,V~(+4)(以V_2O_5计)0.76％,不符合系统实际情况。据资料[1]介绍,可用氧化—还原滴定法测钢铁中的钒。利用钒在室温下易于氧化、
I. INTRODUCTION Due to local corrosion caused by the Benfica decarburization system in 1977, the decarburization system is contaminated and the solution turbidity becomes larger, which brings great difficulties to the chemical analysis. In particular, the project using colorimetric analysis can not be reported Accurate result The original photometric method of vanadium, blank distilled water plus reagent (the same type of plant with the laboratory of the same type of blank self-similar liquid), due to the turbidity of the solution appears gray green, the determination of extinction, the blank can not offset the extinction of the solution color , Resulting in high measured vanadium results. When the solution is the most turbid, vanadium results up to 1.30% V (calculated as V_2O_5) and 0.76% V_ (+4) (calculated as V_2O_5), which is inconsistent with the actual situation of the system. According to the information [1] Introduction, available oxidation - reduction titration of vanadium in steel. The use of vanadium at room temperature easy oxidation,