公开(公告)号：US20240287644A1

公开(公告)日：2024-08-29

申请号：US18043943

申请日：2022-10-12

Applicant: KUNMING UNIVERSITY OF SCIENCE AND TECHNOLOGY

Inventor： Bin YANG ,  Baoqiang XU ,  Wenlong JIANG ,  Juhai DENG ,  Dachun LIU ,  Yang TIAN ,  Yifu LI ,  Lingxin KONG ,  Jia YANG

IPC: C22B7/00 ,  C22B1/06 ,  C22B13/02 ,  C22B15/00 ,  C22B30/04 ,  C22B30/06 ,  C22B61/00 ,  C25C1/20

CPC classification number: C22B7/007 ,  C22B1/06 ,  C22B7/001 ,  C22B13/025 ,  C22B15/0017 ,  C22B15/0056 ,  C22B15/0071 ,  C22B30/04 ,  C22B30/06 ,  C22B61/00 ,  C25C1/20

Abstract: Provided is a recovery method for valuable metals in copper anode slime. By using the recovery method of the disclosure, selenium, copper, tellurium, arsenic, lead, bismuth, and precious metals gold and silver in the copper anode slime are recovered. The method adopts two-step vacuum carbothermal reduction to replace reduction smelting of anode slime and stepwise blowing of noble lead in the traditional pyrometallurgy, and avoids the emission of arsenic-containing soot in the traditional process. The recovered gold-rich residue contains almost no base metals such as lead, bismuth, antimony, and arsenic. After subjecting the gold-rich residue to leaching gold by chlorination and reduction, a gold powder could be obtained therefrom with a lower content of base metals than traditional processes. Therefore, the method greatly reduces the amount of produced slag, shortens the production cycle, and reduces the loss of precious metals in the slag.

公开(公告)号：US20240375956A1

公开(公告)日：2024-11-14

申请号：US18691363

申请日：2022-03-24

Applicant: KUNMING UNIVERSITY OF SCIENCE AND TECHNOLOGY

Inventor： Baoqiang XU ,  Huan LUO ,  Bin YANG ,  Wenlong JIANG ,  Lang LIU ,  Guozheng ZHA ,  Heng XIONG ,  Yang TIAN ,  Lingxin KONG ,  Yifu LI ,  Fei WANG ,  Jia YANG ,  Tao QU ,  Dachun LIU

IPC: C01B19/02 ,  B01D3/10 ,  B01D3/14

Abstract: Disclosed is a method for removing impurity mercury from crude selenium. The method includes: mixing a vulcanizing agent with a crude selenium slag that is crushed to not more than 200 mesh uniformly, and performing briquetting to obtain a mixed material; adding the mixed material into a sealed furnace, and subjecting the mixed material to vulcanization by heating under an inert atmosphere to obtain a vulcanized selenium; subjecting the vulcanized selenium to primary vacuum distillation, such that selenium is converted into a gas phase and collected in a form of a volatile, and generated mercury sulfide and valuable elements are enriched in a resulting residue; and subjecting the selenium to secondary distillation to further remove mercury.