摘要
利用超声波的空化作用可有效强化南方离子型稀土矿中稀土的浸出,从而提高稀土浸出率并缩短矿物中稀土总量的分析时间。在20g/L的硫酸铵浸矿液中超声浸矿30min,可使离子型稀土的浸出率达99%以上,而传统搅拌法需4h,甚至浸取过夜。超声法与搅拌法对干扰杂质铁、铝的浸出率相近,加入乙酰丙酮及磺基水杨酸等掩蔽剂后不影响EDTA滴定稀土时的终点判断,且测定结果与电感耦合等离子体发射光谱法测定结果一致性好。
The use of ultrasonic cavitation can effectively strengthen the leaching of rare earths in the southern ionic rare earth ore,thereby increasing the leaching rate of rare earths and shortening the analysis time of the total rare earths in minerals.Ultrasonic leaching for 30 min in 20g / L ammonium sulfate leaching solution make the leaching rate of ionic rare earths be more than 99%,while the traditional stirring method takes 4 hours,even leach overnight.The ultrasonic method and stirring method has similar leaching rate for interfere impuritis iron and aluminum.After the masking agents acetylacetone and sulfosalicylic acid are added,the end judgment of titration of rare earth by EDTA is not affected,and the measured results are well consistent with the results of inductively coupled plasma atomic emission spectrometry.
出处
《冶金分析》
CAS
CSCD
北大核心
2012年第11期22-25,共4页
Metallurgical Analysis
