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    Recovery of rare earth metals from waste material by leaching in non-oxidizing acid and by precipitating using sulphates
    22.
    发明公开
    Recovery of rare earth metals from waste material by leaching in non-oxidizing acid and by precipitating using sulphates 有权
    通过在非氧化性酸浸提从废料稀土金属的恢复，并通过用硫酸盐沉淀

    公开(公告)号：EP2444507A1

    公开(公告)日：2012-04-25

    申请号：EP10188264.5

    申请日：2010-10-20

    申请人： Montanuniversität Leoben

    发明人： Luidold, Stefan ,  Antrekowitsch, Helmut

    IPC分类号： C22B3/10 ,  C22B3/44 ,  C22B7/00 ,  C22B59/00 ,  H01M10/54

    CPC分类号： C22B59/00 ,  C22B3/10 ,  C22B3/44 ,  C22B7/007 ,  H01M8/008 ,  H01M10/54 ,  Y02P10/234 ,  Y02W30/84 ,  Y02W30/86

    摘要： A method of recycling rare earth metals included in a waste material, wherein the method comprises acidic leaching of the waste material using a non-oxidizing acid for solubilizing at least a part of metals included in the waste material while maintaining at least a part of non-metallic materials of the waste material in solid form, separating the remaining solid components of the leached waste material from a solution of the solubilized metals, and precipitating selectively at least a part of the rare earth metals in the solution while maintaining other metals in dissolved form, wherein the precipitating comprises adding sulphates to the solution of the solubilized metals and adding an alkaline solution to the solution of the solubilized metals for increasing the pH-value. As a non-onidizing acid, it is preferable to use hydrocloric acid in a concentration between 10% and 40%. As added sulphate, sodium sulphate is advantageously used as an aqueous solution.

    摘要翻译： 回收的稀土金属的方法，包括在废料，worin该方法包括使用增溶的非氧化性的酸的至少金属的一部分包含在废料，同时保持至少非一部分废物的酸性浸提 固体形式的废料的-metallic材料，从溶解的金属的溶液中分离出浸出废物材料的剩余的固体组分，和沉淀选择性至少稀土金属的一部分在该溶液中，同时保持溶的其它金属 形状，worin沉淀包括将硫酸盐的溶解金属的溶液并加入到碱性溶液中，溶解的金属的溶液提高pH值。 作为非onidizing酸中，优选使用酸hydrocloric以浓度10％和40％之间。 作为添加硫酸，硫酸钠有利地用作在wässrige溶液。

    PROCEDE DE TRAITEMENT D'UN SOLIDE AMIANTE
    23.
    发明授权
    PROCEDE DE TRAITEMENT D'UN SOLIDE AMIANTE 有权
    方法石棉物质的治疗

    公开(公告)号：EP2285455B1

    公开(公告)日：2012-04-25

    申请号：EP09750046.6

    申请日：2009-05-06

    申请人： Institut National Polytechnique De Toulouse (INPT)

    发明人： DENIS, Ghislain ,  DELMAS, Michel

    IPC分类号： A62D3/36 ,  C22B3/10 ,  C22B3/44 ,  C22B7/00

    CPC分类号： A62D3/36 ,  A62D2101/41 ,  C22B3/10 ,  C22B3/44 ,  C22B7/007 ,  Y02P10/234

    摘要： The invention relates to a method for treating an asbestos solid (1), said method comprising at least one hot acid treatment step (4) for treating the asbestos (3) of the asbestos solid (1) at atmospheric pressure with an aqueous solution (5) of hydrochloric acid at a temperature close to the boiling temperature of the aqueous solution (5) of hydrochloric acid, in such a way as to obtain a so-called non-silicic solution (8) of at least one non-silicic constituent of the asbestos (3) in the aqueous solution (5) of hydrochloric acid and a so-called silicic solid (9). Said method is characterised in that the non-silicic solution (8) is subjected to a so-called precipitation treatment (13), wherein a selective precipitation (13) of the cationic species of iron present in said non-silicic solution (8) is carried out.

    LEACHING PROCESS IN THE PRESENCE OF HYDROCHLORIC ACID FOR THE RECOVERY OF A VALUE METAL FROM AN ORE
    29.
    发明授权
    LEACHING PROCESS IN THE PRESENCE OF HYDROCHLORIC ACID FOR THE RECOVERY OF A VALUE METAL FROM AN ORE 有权
    浸出酸存在为了获得有价值金属从矿石

    公开(公告)号：EP1809778B1

    公开(公告)日：2009-07-08

    申请号：EP05797276.2

    申请日：2005-10-21

    申请人： Anglo Operations Limited

    发明人： SMIT, Jan Tjeerd ,  STEYL, Johann Du Toit

    IPC分类号： C22B3/10

    CPC分类号： C22B19/22 ,  C01F5/40 ,  C01G9/06 ,  C01G21/20 ,  C01G49/06 ,  C22B3/10 ,  C22B3/44 ,  C22B19/26 ,  C22B23/0423 ,  Y02P10/234

    摘要： A process is described for leaching a value metal from an ore containing said value metal, the process including the steps of leaching the ore in the presence of hydrochloric acid so as to form a soluble metal-chloride salt in a leach solution; adding sulphuric acid to the leach solution; recovering a metal-sulphate salt from the leach solution; and regenerating hydrochloric acid. The ore may be an oxidic base metal ore, such as a zinc oxide ore; a lateritic nickel ore, such as a saprolitic or limonitic ore; a sulphide ore or a titanium ore. The value metal is typically selected from the group consisting of Zn, Cu, Ti, Al, Cr, Ni, Co, Mn, Fe, Pb, Na, K, Ca, platinum group metals and gold. The metal in the metal-sulphate salt may be the value metal, or may be a metal of less value than the value metal, such as magnesium. The regenerated hydrochloric acid is recycled within the leach process.