公开(公告)号：US20240344172A1

公开(公告)日：2024-10-17

申请号：US18701088

申请日：2022-10-04

Applicant: JFE STEEL CORPORATION

Inventor： Yuta HINO ,  Yotaro INOUE ,  Katsunori TAKAHASHI

IPC: C22B7/00 ,  C22B23/02 ,  C22B47/00 ,  H01M10/54

CPC classification number: C22B7/001 ,  C22B23/021 ,  C22B47/00 ,  H01M10/54

Abstract: A method for recovering a valuable element, by which method metal with a high proportion of a valuable element can be obtained. The method includes adding a reductant to an oxide containing at least one element selected from the group consisting of nickel and cobalt, followed by heating, to thereby reduce the oxide, the reductant contains at least one selected from the group consisting of metallic iron and an iron oxide, and an addition amount of the reductant is 1.3 equivalent or less.

公开(公告)号：US20210054479A1

公开(公告)日：2021-02-25

申请号：US16977378

申请日：2019-02-22

Applicant: JFE STEEL CORPORATION

Inventor： Nobuhiko ODA ,  Yuta HINO ,  Yuki TAKAKI ,  Yoshiaki NISHINA ,  Naoki KIKUCHI

IPC: C22B9/14 ,  C22B47/00 ,  C21C7/00

Abstract: A manufacturing method includes a first pulverization step of compressively pulverizing a manganese oxide-containing material containing at least manganese, calcium, silicon, iron, and phosphorus, which is used as a raw material, to form a composite in which a compound phase of nCaO.P2O5 is combined with at least one phase of a spinel phase and a calcium ferrite phase, which are ferromagnetic materials, and produce a first pulverized manganese oxide-containing material containing the composite; a first magnetic separation step of separating the first pulverized manganese oxide-containing material produced in the pulverization step into a magnetic substance and a non-magnetic substance under a magnetic force; and a step of recovering the non-magnetic substance separated in the first magnetic separation step as a manganese raw material.