摘要
铁矿石中的硫含量是衡量钢铁冶炼性能的重要指标,检测硫含量具有重要的意义。采用国家标准GB/T 6730.16—2016中的硫酸钡重量法测定硫,探讨熔剂用量、氯化钡浓度以及沉淀时的保温时间和保温温度对硫含量测定的影响,获得测定铁矿石中硫含量的最佳实验条件。结果显示,2.0000 g标准铁矿石(硫含量为0.036%)样,熔剂用量为14、16 g时硫回收率高达99.9%,氯化钡浓度为100 g/L时硫回收率高达99.9%。沉淀时的保温温度为60℃、保温时间2 h,获得的晶形沉淀颗粒较大,易于过滤和洗涤。方法具有较高的准确度和精密度,相对误差为-2.8%,相对标准偏差为1.3%。
The sulfur content in iron ores is an important index to evaluate the metallurgical properties of steel.The determination of sulfur is of great significance.Measuring sulfur by barium sulfate gravimetric method were carried out according to GB/T 6730.16—2016,the flux dosage,barium chloride concentration,and the time and the temperature during precipitation that affect the determination of sulfur in iron ores was discussed in this paper,and the optimum experimental conditions were obtained.The results show that 2.0000 g standard iron ore(containing 0.036%sulfur),the recovery of sulfur is 99.9%when flux is 14 g and 16 g,and 99.9%when barium chloride concentration is 100 g/L.When the precipitation temperature is 60℃and the holding time is 2 h,the crystal precipitates are large and easy to be filtered and washed.The relative error is-2.8%and the relative standard deviation is 1.3%,the method has high accuracy and high precision.
作者
漆寒梅
周言凤
陈利娟
文静
QI Hanmei;ZHOU Yanfeng;CHEN Lijuan;WEN Jing(Resource and Environment Department,Hunan Nonferrous Metals Vocational and Technical College,Zhuzhou,Hunan 412000,China)
出处
《中国无机分析化学》
CAS
北大核心
2021年第4期31-34,共4页
Chinese Journal of Inorganic Analytical Chemistry
基金
湖南省自然科学基金(020JJ7058)。
关键词
硫酸钡重量法
熔剂用量
氯化钡浓度
保温温度
保温时间
barium sulfate gravimetric method
flux dosage
barium chloride concentration
precipitation temperature
holding time
