RECOVERY OF GOLD AND/OR SILVER FROM SCRAP
    67.
    发明公开
    RECOVERY OF GOLD AND/OR SILVER FROM SCRAP 审中-公开
    RÜCKGEWINNUNGVON GOLD UND / ODER SILBER AUS ALTMETALL

    公开(公告)号:EP3148939A1

    公开(公告)日:2017-04-05

    申请号:EP15754631.8

    申请日:2015-02-26

    摘要: Gold and silver are recovered selectively such that gold and silver are separated from non-silver and non-gold material within the scrap. Gold and silver are recovered from scrap material using mixtures of acids, in some instances. The mixture comprises nitric acid and at least one supplemental acid, such as sulfuric acid or phosphoric acid. The amount of nitric acid within the mixture are relatively small compared to the amount of sulfuric acid or phosphoric acid within the mixture. The recovery of gold and silver using the acid mixtures are enhanced by transporting an electric current between an electrode and the gold and silver of the scrap material. Acid mixtures are used to recover silver from particular types of scrap materials, such as scrap material comprising silver metal and cadmium oxide and scrap material comprising silver metal and tungsten metal.

    摘要翻译: 金和银被选择性地回收,使得金和银与废金中的非银和非金材料分离。 在某些情况下,使用酸的混合物从废料中回收金和银。 该混合物包含硝酸和至少一种补充酸,例如硫酸或磷酸。 与混合物中的硫酸或磷酸的量相比,混合物内的硝酸的量相对较小。 通过在电极和废料的金和银之间传输电流来增强使用酸混合物的金和银的回收。 酸混合物用于从特定类型的废料回收银,例如包含银金属和氧化镉的废料以及包含银金属和钨金属的废料。