公开(公告)号：US09752213B2

公开(公告)日：2017-09-05

申请号：US14430268

申请日：2013-09-29

Applicant: Grirem Advanced Materials Co., Ltd.

Inventor： Liangshi Wang ,  Zhiqi Long ,  Dali Cui ,  Xiaowei Huang ,  Ying Yu ,  Yang Xu ,  Xingliang Feng

IPC: C22B59/00 ,  C22B1/02 ,  C22B3/10

CPC classification number: C22B59/00 ,  C22B1/02 ,  C22B3/10 ,  Y02P10/234

Abstract: A method for comprehensively recovering rare earth elements and fluorine element in a bastnaesite treatment process. The method comprises: oxidation roasting a bastnaesite, and leaching a roasted mixture using a hydrochloric acid, adding a roasting promoter to the bastnaesite during the roasting process; and/or during the leaching process using the hydrochloric acid, adding a catalytic leaching promoter into the mixture, obtaining a rare earth chloride solution containing little cerium element and a cerium-rich residue containing the fluorine element; and separating and recovering rare earth fluorides from the cerium-rich residue.

公开(公告)号：US20150252449A1

公开(公告)日：2015-09-10

申请号：US14430268

申请日：2013-09-29

Applicant: Grirem Advanced Materials Co., Ltd.

Inventor： Liangshi Wang ,  Zhiqi Long ,  Dali Cui ,  Xiaowei Huang ,  Ying Yu ,  Yang Xu ,  Xingliang Feng

IPC: C22B59/00 ,  C22B3/10 ,  C22B1/02

CPC classification number: C22B59/00 ,  C22B1/02 ,  C22B3/10 ,  Y02P10/234

Abstract: A method for comprehensively recovering rare earth elements and fluorine element in a bastnaesite treatment process. The method comprises: oxidation roasting a bastnaesite, and leaching a roasted mixture using a hydrochloric acid, adding a roasting promoter to the bastnaesite during the roasting process; and/or during the leaching process using the hydrochloric acid, adding a catalytic leaching promoter into the mixture, obtaining a rare earth chloride solution containing little cerium element and a cerium-rich residue containing the fluorine element; and separating and recovering rare earth fluorides from the cerium-rich residue.

Abstract translation: 稀土元素和氟元素的综合回收方法。 该方法包括：将焙烧方法进行氧化焙烧，并用盐酸浸出焙烧混合物，并在焙烧过程中向焙烧炉中加入焙烧促进剂; 和/或在使用盐酸的浸出过程中，在混合物中加入催化浸出促进剂，得到含有少量铈元素的稀土氯化物溶液和含有氟元素的富铈残渣; 并从富铈残渣中分离回收稀土氟化物。