公开(公告)号：US20230193423A1

公开(公告)日：2023-06-22

申请号：US17977459

申请日：2022-10-31

Applicant: HATCH LTD.

Inventor： Robert John Fraser ,  Jacqueline Fossenier ,  Maryam Neisani ,  Louiza Kahina Karkouk ,  Amir Mohammad Nazari ,  Fangyu Liu

IPC: C22B23/06 ,  C22B3/00

CPC classification number: C22B23/06 ,  C22B23/043 ,  C22B23/0461

Abstract: Processes and methods for refining ferronickel alloy, and producing nickel sulfate or other nickel product, are provided, where the ferronickel alloy is treated with an oxidizing leach. The oxidizing leach may be, for example, a pressure oxidation (POX) leach or a leach with peroxide or copper (II) ions. The treatment may be in the presence of added copper, such as by providing a copper sulfate solution. Producing nickel sulfate may comprise removing copper and iron after the leach, removing impurities, and either crystallizing the nickel sulfate or precipitating/winning another nickel product.