公开(公告)号：US20240124952A1

公开(公告)日：2024-04-18

申请号：US18277852

申请日：2022-02-25

Applicant: NITTETSU MINING CO., LTD.

Inventor： Yousuke EBISU ,  Tamaki SAITO ,  Kohei MITSUHASHI

IPC: C22B15/00 ,  C22B1/11 ,  C22B30/04

CPC classification number: C22B15/0089 ,  C22B1/11 ,  C22B30/04

Abstract: In producing a copper concentrate by flotation in which copper minerals are separated from arsenic minerals by using oxoacids of sulfur and oxidants, the arsenic in the copper concentrate is reduced by a simple method. In producing the copper concentrate by the flotation in which an arsenic-containing copper ore is a raw material, the oxoacids of sulfur and hydrogen peroxide as the oxidant are used together as additive reagents, and added in this order.

公开(公告)号：US20130251610A1

公开(公告)日：2013-09-26

申请号：US13688350

申请日：2012-11-29

Applicant: NITTETSU MINING CO., LTD. ,  TOYO ENGINEERING CORPORATION ,  SUMITOMO CORPORATION

Inventor： Masanobu KAWATA ,  Hirohumi TANAKA ,  Kohei MITSUHASHI ,  Ryo KAWARABUKI ,  Youichi YAMAMOTO ,  Keita KAMIYAMA ,  Atsushi MORIYA ,  Norifumi SAKAI

IPC: C01D15/08

CPC classification number: C01D15/08

Abstract: The present invention relates to a method for producing lithium carbonate, which is important as a raw material of a lithium ion battery and the like, from brine resources. More specifically, the invention relates to a method for producing lithium carbonate, in which carbon dioxide gas obtained by calcining limestone is introduced, in the presence of ammonia, into a concentrated brine, which is prepared from a lithium-containing brine as a raw material through an evaporative concentrating step, a desulfurizing step and an electrodialysis step, thereby depositing lithium carbonate crystals, and the crystals thus deposited are recovered through solid-liquid separation.

Abstract translation: 本发明涉及从卤水资源作为锂离子电池等的原料而重要的碳酸锂的制造方法。 更具体地说，本发明涉及一种生产碳酸锂的方法，其中在氨的存在下将煅烧石灰石获得的二氧化碳气体引入浓缩的盐水中，所述浓盐水是以含锂盐水为原料制备的 通过蒸发浓缩步骤，脱硫步骤和电渗析步骤，由此沉积碳酸锂晶体，并且通过固液分离回收这样沉积的晶体。