ICP-AES法测定矿石选冶工艺样品中稀土元素的研究

Determination of Rare Earth Elements in Ore Dressing and Smelting Process Samples by ICP-AES

研究了采用等离子体光谱法直接测定稀土矿石和精矿中稀土分量时检测波长的选择,在本法选择的波长下,避免了稀土元素相互之间的相互干扰(Pr通过校正系数校正);选择的过氧化钠熔融分离条件,消除了基体元素钙、镁、铁、铝对稀土测定的干扰;在10%的盐酸介质中,稀土元素的的谱线强度稳定且溶液不易发生水解。在实验确定的条件下,检测了国外某矿床稀土原矿和选矿工艺控制分析,原矿分析结果与国外实验室提供的检测结果吻合,应用于工艺控制中稀土元素的检测,实现物料平衡,结果令人满意;方法具有较高的精密度,不经过分离富集,简化了检测流程,操作简便、快速,适合于稀土矿石和选矿工艺控制分析。

The selection of detection wavelength for the direct determination of rare earth elements in rare earth ores and concentrates by plasma spectrometry is studied.Under the wavelength selected by this method,the mutual interference between rare earth elements is avoided(Pr is corrected by correction coefficient).The interference of matrix elements calcium,magnesium,iron and aluminum on the determination of rare earth can be eliminated by the selected melting separation conditions of sodium peroxide.In the medium of 10%hydrochloric acid,the spectral intensity of rare earth elements is stable and the solution is not easy to hydrolyze.Under the conditions determined by experiments,the raw ore of rare earth in a foreign deposit and the control analysis of beneficiation process are tested.The raw ore analysis results are consistent with the test results provided by foreign laboratories.It has been applied to the detection of rare earth elements in process control to achieve material balance,and the results are satisfactory.The method has high precision,does not undergo separation and enrichment,simplifies the detection process,is simple and fast,and is suitable for the control and analysis of rare earth ores and beneficiation processes.