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    LITHIUM RECOVERY FROM SLAGS
    3.
    发明公开
    LITHIUM RECOVERY FROM SLAGS 审中-实审

    公开(公告)号：EP4372108A1

    公开(公告)日：2024-05-22

    申请号：EP23163519.4

    申请日：2023-03-22

    申请人： Umicore

    发明人： TANSKANEN, Pekka Antero ,  LAINE, Petteri Heikki Samuli ,  LASSI, Ulla Marianne ,  CALLEBAUT, Willem ,  VERHEES, Pieter

    IPC分类号： C22B1/00 ,  C22B3/12 ,  C22B7/00 ,  C22B7/04 ,  C22B26/12 ,  H01M10/54

    CPC分类号： C22B1/005 ,  C22B3/12 ,  C22B7/04 ,  C22B7/008 ,  C22B26/12 ,  H01M10/54

    摘要： Li-bearing slags are typically produced when Li-batteries or their waste are recycled on a smelter. The Li recovery process comprises the steps of:
    - powdering the metallurgical slag to a particle size distribution having a D50 of less than 100 µm;
    - contacting, in an aqueous medium, the Li-containing metallurgical slag, and an alkaline Ca-compound, provided in amounts selected to obtain a molar ratio of the Ca in the Ca-compound to Li in the slag of at least 0.75, thereby obtaining a suspension;
    - heating the suspension to a temperature of more than 80 °C for at least 30 min, thereby obtaining a leached suspension; and,
    - separating solids from liquids in the leached suspension, thereby obtaining a leach solution containing a major part of the Li, and a solid residue containing Ca.
    This alkaline leaching process allows for a straightforward recovery of battery-grade LiOH from the leach solution, while consuming less reagents than known acidic leaching processes.

    PARTICLE SEPARATION IN METHOD FOR RECOVERING MAGNETITE FROM BAUXITE RESIDUE
    8.
    发明公开
    PARTICLE SEPARATION IN METHOD FOR RECOVERING MAGNETITE FROM BAUXITE RESIDUE 审中-公开
    从铝土矿渣中回收磁铁矿的方法中的粒子分离

    公开(公告)号：EP3224204A1

    公开(公告)日：2017-10-04

    申请号：EP15863838.7

    申请日：2015-11-24

    申请人： GMR, LLC

    发明人： AMIRAN, Mohsen

    IPC分类号： C01G49/08 ,  C22B34/12 ,  C22B21/02

    CPC分类号： C01G49/08 ,  C01B32/40 ,  C01F7/066 ,  C01G23/053 ,  C22B1/005 ,  Y02P10/212 ,  Y02P20/142

    摘要： A method of recovering magnetite from bauxite residue, comprising reducing the pH of the bauxite residue to form a treated bauxite residue, drying the treated bauxite residue, adding to and mixing into the treated bauxite residue a solid source of carbon, to create a mixture, heating the mixture to a reduction temperature of at least 800° C. in a reducing reactor to produce a reduced bauxite residue in which a major portion of Fe2O3 present in the treated bauxite residue has been converted to Fe3O4, exposing the reduced bauxite residue to a particle separation step, and then separating the reduced bauxite residue into an iron-enriched portion and an iron-depleted portion.

    摘要翻译： 一种从铝土矿渣（62）中回收磁铁矿的方法，该方法包括降低铝土矿渣（62）的pH值（63）以形成经处理的铝土矿渣，干燥（64）经处理的铝土矿渣，加入并混合成（65） 处理后的铝土矿残余物是固体碳源（66），形成混合物，在还原反应器（67）中将混合物加热至至少800℃的还原温度以产生还原的铝土矿残余物，其中大部分的 存在于经处理的铝土矿残渣中的Fe 2 O 3已转化为Fe 3 O 4，将还原的铝土矿残渣暴露于颗粒分离步骤（71），然后将还原的铝土矿残渣分离（72）成富含铁的部分（73）和贫铁 部分（74）。