公开(公告)号：US20190352740A1

公开(公告)日：2019-11-21

申请号：US16529729

申请日：2019-08-01

Applicant: CENTRAL SOUTH UNIVERSITY

Inventor： Zhongwei ZHAO ,  Yongli LI ,  Xuheng LIU ,  Wanhai XIAO ,  Xingyu CHEN ,  Jiangtao LI

IPC: C22B3/08 ,  C22B3/38 ,  C22B15/00 ,  C22B3/00

Abstract: The present invention relates to the field of ore smelting technology, and particularly provides a method and system for comprehensive recovery and utilization of copper-nickel sulfide ore. Under normal pressure, the method can be used to directly leach copper-nickel sulfide ore concentrate or low-grade nickel matte obtained by matte smelting of copper-nickel sulfide ore. In the leaching process, the leaching rate of nickel, cobalt and iron is up to 99% or more, and copper is hardly leached, whereby the deep separation of copper from elements such as nickel and cobalt is directly realized, and the huge system for copper-nickel separation in the conventional process is omitted. Moreover, noble metals are not leached, and almost all of them remain in the leaching slag with copper, so the destiny is simple.

公开(公告)号：US20230203687A1

公开(公告)日：2023-06-29

申请号：US18086681

申请日：2022-12-22

Applicant: CENTRAL SOUTH UNIVERSITY

Inventor： Lihua HE ,  Zhongwei ZHAO ,  Xuheng LIU

IPC: C25C1/02 ,  C25C7/02 ,  C25C7/04

CPC classification number: C25C1/02 ,  C25C7/02 ,  C25C7/04

Abstract: A membrane-stacked electrolytic bath for lithium extraction from salt lakes by electrochemical intercalation/deintercalation includes a positioning supporting plate as well as a first compressing plate, a first rubber gasket, at least one electrochemical intercalation/deintercalation unit, a second rubber gasket, and a second compressing plate which are sequentially arranged in an overlapped manner; a compressing apparatus for abutting against the second compressing plate is arranged on one side of the second compressing plate to enable peripheral edges of the first compressing plate, the first rubber gasket, the electrochemical intercalation/deintercalation unit, the second rubber gasket, and the second compressing plate to be sealed; the first compressing plate is provided with water outlet pipes communicated with the electrochemical intercalation/deintercalation unit; and the second compressing plate is provided with water inlet pipes communicated with the electrochemical intercalation/deintercalation unit.

公开(公告)号：US20230212769A1

公开(公告)日：2023-07-06

申请号：US18086697

申请日：2022-12-22

Applicant: CENTRAL SOUTH UNIVERSITY

Inventor： Zhongwei ZHAO ,  Lihua HE ,  Xuheng LIU

IPC: C25C1/02 ,  C25C7/02 ,  C25C7/04

CPC classification number: C25C1/02 ,  C25C7/02 ,  C25C7/04

Abstract: An electrochemical method and an apparatus for extracting lithium from a solution using bipolar electrodes are provided. The apparatus adopts electrodes respectively coated with a lithium-rich electroactive material and a lithium-deficient electroactive material as end plates, which are separated by a plurality of bipolar electrodes coated with a lithium-rich electroactive material and a lithium-deficient electroactive material respectively on two sides, where the side of the bipolar electrode facing the end plate of the lithium-rich electroactive material is coated with the lithium-deficient electroactive material, and the side of the bipolar electrode facing the end plate of the lithium-deficient electroactive material is coated with the lithium-rich electroactive material. The apparatus adopts a conventional voltage, requires a small total current and a simple power supply, greatly reduced the amount of busbar required, allows for easy process control, and is suitable for industrial production.

公开(公告)号：US20230158424A1

公开(公告)日：2023-05-25

申请号：US17992949

申请日：2022-11-23

Applicant: CENTRAL SOUTH UNIVERSITY

Inventor： Jiangtao LI ,  Zhongwei ZHAO ,  Zhichao LI ,  Xingyu CHEN ,  Xuheng LIU ,  Lihua HE ,  Fenglong SUN ,  Yongjin LUO ,  Muye CUI

IPC: B01D9/00 ,  C01G39/00

CPC classification number: B01D9/0063 ,  B01D9/005 ,  C01G39/006 ,  B01D2009/0086 ,  C01P2002/72 ,  C01P2004/03

Abstract: A method for crystallization of β-ammonium tetramolybdate includes: performing a stepwise pH-adjusting treatment of an ammonium molybdate solution via zoning to obtain the β-ammonium tetramolybdate. When feeding the ammonium molybdate solution into a reaction system from a first zone and then into second to sixth zones successively, pH1 of a resultant solution in the first zone is 7.0-6.0; pH2 of a resultant solution in the second zone is less than 6 and greater than or equal to 4; pH3 of a resultant solution in the third zone is less than 4 and greater than or equal to 2.5; pH4 of a crystallized slurry in the fourth zone is less than 2.5 and greater than or equal to 1; pH5 of a crystallized slurry in the fifth zone is 2.5-4.0; and pH6 of a crystallized slurry in the sixth zone is less than 2.5 and greater than or equal to 2.0.

公开(公告)号：US20130186760A1

公开(公告)日：2013-07-25

申请号：US13798043

申请日：2013-03-12

Applicant: CENTRAL SOUTH UNIVERSITY

Inventor： Zhongwei ZHAO ,  Xuheng LIU

IPC: C25C1/22

CPC classification number: C25C1/22 ,  B01D61/44 ,  B01J47/12 ,  C22B26/12

Abstract: A method for extracting and enriching lithium, including: (a) providing an electrodialysis device including an electrodialysis cell; (b) dividing the electrodialysis cell into a lithium salt chamber and a brine chamber using an anion exchange membrane; (c) filling the brine chamber with salt lake brine; (d) filling the lithium salt chamber with a Mg2+ free supporting electrolyte solution; (e) placing a conductive substrate coated with an ion sieve in the brine chamber to operate as a cathode; (f) placing a conductive substrate coated with a lithium-intercalated ion sieve in the lithium salt chamber to operate as an anode; and (g) carrying out an electrodialysis.

Abstract translation: 一种提取和富集锂的方法，包括：（a）提供包括电渗析池的电渗析装置; （b）使用阴离子交换膜将电渗析池分成锂盐室和盐水室; （c）用盐湖盐水填充盐水室; （d）用不含Mg 2+的电解液填充锂盐室; （e）将涂覆有离子筛的导电基材放置在盐水室中以用作阴极; （f）将涂覆有锂嵌入离子筛的导电基材放置在锂盐室中以用作阳极; 和（g）进行电渗析。