公开(公告)号：WO2022115021A1

公开(公告)日：2022-06-02

申请号：PCT/SE2021/051165

申请日：2021-11-23

Applicant: EASYMINING SWEDEN AB

Inventor： COHEN, Yariv ,  VAN DER WERF, Angela ,  WESTLUND, Viktoria ,  TUNSU, Cristian ,  ROYEN, Hugo

IPC: C01B25/22 ,  C01F11/46

Abstract: A method for recovery of commercial substances from apatite mineral comprises dissolving (S10) of apatite mineral in an acid comprising hydrochloride. The dissolution gives a first liquid solution comprising phosphate, calcium and chloride ions. The first liquid solution is treated (S20) into a second liquid solution comprising calcium and chloride ions. This treatment in turn comprises extracting (S22) of a major part of the phosphate ions with an organic solvent. A bleed solution is removed (S30) from the second solution. Solid gypsum comprising at least 70% in a di-hydrate crystal form is precipitated (S40) from the second solution. This precipitation of solid gypsum comprises adding (S42) the second solution and sulfuric acid simultaneously into a continuous-stirred reactor in the presence of gypsum crystals. Thereby, the precipitation of solid gypsum gives a third liquid solution comprising hydrochloride. An arrangement for recovery of commercial substances from apatite mineral is also presented.