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金属矿山 ›› 2008, Vol. 38 ›› Issue (04): 77-79+83.

• 矿物工程 • 上一篇    下一篇

用EDTA容量法快速测定铁矿石中的铝含量

左平,胡郑毛   

  1. 国家冶金工业铁精矿质量监督检测中心
  • 收稿日期:2007-02-15 出版日期:2008-04-15 发布日期:2011-07-20

Quick Determination of Aluminum Content in Iron Ore by EDTA Volumetric Method

Zuo Ping,Hu Zhengmao   

  1. National Iron Concentrate Monitoring and Testing Center of Metallurgical Industry
  • Received:2007-02-15 Online:2008-04-15 Published:2011-07-20

摘要: 用EDTA容量法测定铁矿石中的铝含量前必须先分离除去干扰元素,传统的分离方法须分有机试剂萃取、弱碱分离和强碱分离3步进行,流程比较复杂。为此,采用氨水分离和强碱分离两步法对传统方法进行了简化,并通过实验确定了各步骤的适宜操作条件。对实际标准试样的测定结果表明,改进后的方法分析精密度和准确度均达到要求,可实现天然铁矿石、铁精矿、烧结矿和球团矿中0.25%~5.00%范围内铝含量的快速测定。

关键词: EDTA容量法, 铁矿石, 铝含量, 快速测定, 干扰元素分离

Abstract: In the determination of the aluminum content in iron ore by EDTA volumetric method, the interferential elements must be removed in advance.The conventional process for the separation is rather complicated and involves three steps: organic agent extraction, weak alkalescent separation and alkaline separation.Two-step method involving only ammonia separation and alkaline separation was used to simplify the traditional one and the favorable conditions were determined for each step by experiments.The results of the comparison with the real standard test sample indicate that the improved method can meet the requirement in both accuracy and precision, and is capable of rapid determination of the aluminum content in natural iron ore, iron concentrate, sintered ore and pellets in scope of 0.25%~5.00% aluminum content.

Key words: EDTA volumetric method, Iron ore, Aluminum content, Rapid determination, Separation of interferential elements