论文部分内容阅读
一 前言 在钇与非钇稀土的分离中,广泛采用环烷酸萃取法,但目前生产中,都是首先保证钇的纯度,使部份钇留在其它稀土中,这样就存在进一步回收这部份钇的再萃取问题。我们认为这种布局不合理。龙南矿中钇的含量约55％,应通过一次萃取使其钇与非钇稀土较彻底分离,产出非钇稀土(y<0.29～0.43％)同时产出90～99.99％的不同纯度的y_2O_3。这样,一个工艺,一套设备,就可在优先保证钇收率的前提下,按市场需要生产不同纯度的氧化钇产品,而非钇稀土含钇量低,为P507分组或P507萃取色层分离单一稀土创造了良好条件。
A foreword Yttrium and non-yttrium rare earth separation, the widespread use of naphthenic acid extraction, but the current production, are the first to ensure the purity of yttrium, so that some yttrium left in other rare earth, so there is a further recovery of this Re-extraction of yttrium. We think this layout is not reasonable. The content of yttrium in Longnan Mine is about 55%, and the yttrium and non-yttrium rare earth should be completely separated by one extraction to produce yttrium rare earth (y <0.29 ~ 0.43%) and y_2O_3 with different purity of 90 ~ 99.99% . In this way, a process, a set of equipment, yttrium yield can be guaranteed in the premise, according to market needs to produce yttrium oxide products of different purity, while non-yttrium rare earth yttrium content is low, P507 group or P507 extraction chromatography A single rare earth created a good condition.