萃取流量参数对稀土槽分布的影响

以国内某稀土厂生产萃取线A的La/CePr/Nd萃取过程为研究对象，通过采集和分析萃取槽各级有机相和水相中稀土元素的含量，明确不同皂化有机相流量、料液流量、酸流量等条件对各级稀土元素含量分布和稀土总量的影响。适当提高皂化有机相流量、料液流量和酸流量，可使水相出口处La的含量较高，从而保证出口产品纯度，但会使55级有机相出口处有机相中Ce组分含量较高，Pr、Nd组分含量较低，增加下一系列分离Pr、Nd的压力。

Effect of Flow of Extraction on Tank Distribution

The La/CePr/Nd extraction process of the rare earth plant production extraction line A was taken as the research object. By collecting and analyzing the content of rare earth elements in the organic phase and aqueous phase at all levels of the extraction tank, the effects of different saponification organic phase flow, feed liquid flow, acid flow and other conditions on the content distribution of rare earth elements at all levels and the total amount of rare earth elements were determined. Properly increasing the saponification organic phase flow, feed liquid flow and acid flow can make the content of La at the outlet of the aqueous phase higher, thus ensuring the purity of the exported product. However, it will make the content of Ce component higher and the content of Pr, Nd component lower in the organic phase at the outlet of grade 55 organic phase, increasing the pressure for the next series of separation of Pr and Nd.