高温碱熔-电感耦合等离子体发射光谱法测定铁矿石中二氧化硅的含量

High-temperature Alkali Fusion - Inductively Coupled Plasma Emission Spectrometry for Determining the Silica Content in Iron Ore

摘要

铁矿石是钢铁生产中不可缺少的原材料，它里面的化学成分在冶炼过程严重影响着钢铁的质量。本次实验采用Therme ICP-AES 7200等离子发射光谱仪进行分析测试，获得硅元素的试验分析谱线数据和试验分析谱线图。本次方法与国标方法相对比，它们的相对误差范围在-1.51 %~0.29%区间。因此，使用本次方法测定二氧化硅在铁矿石中的含量，与国家标准方法测定结果基本相同，没有显著差异，偏差在国家标准规定范围内，证明本次试验方法精确可信。确立了以高温碱熔处理和盐酸提取，制备岩石样品母液，采用电感耦合等离子体发射光谱法测定铁矿中二氧化硅含量的方法。

Abstract

Iron ore is an essential raw material in steel production, and its chemical composition significantly affects the quality of steel during the smelting process. In this experiment, the Thermo ICP-AES 7200 inductively coupled plasma emission spectrometer was used for analytical testing, obtaining the experimental analysis spectral data and spectral graph for silicon. Compared with the national standard method, the relative error range of this method is between -1.51% and 0.29%. Therefore, using this method to determine the silica content in iron ore yields results that are basically the same as those determined by the national standard method, with no significant difference, and deviations are within the range specified by the national standard, proving that this experimental method is precise and reliable. A method was established to determine the silica content in iron ore by high-temperature alkali fusion treatment and hydrochloric acid extraction to prepare rock sample solutions, followed by determination using inductively coupled plasma emission spectrometry.

关键词

高温碱熔 / 电感耦合等离子体发射光谱法 / 铁矿石 / 二氧化硅

Key words

high-temperature alkaline fusion / inductively coupled plasma emission spectroscopy / iron ore / silicon dioxide

参考文献

[1] 中华人民共和国地质矿产行业标准DZ/T0130-2006《地质矿产实验室测试质量管理规范》, 北京,中国标准出版社, 2007.

[2] GB/T6730-1986《国家标准局.铁矿石化学分析法》.

[3] 《岩石矿物分析》, 北京, 地质出版社, 第四版, 2011.