Method for improving metals recovery using high temperature...

C - Chemistry – Metallurgy – 22 – B

Patent

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C22B 3/04 (2006.01) C22B 11/00 (2006.01) C22B 11/08 (2006.01) C22B 15/00 (2006.01)

Patent

CA 2454812

The present invention is directed to a process for recovering metal values from metal-bearing materials. During a reactive process, a seeding agent is introduced to provide a nucleation site for the crystallization and/or growth of solid species which otherwise tend to passivate the reactive process or otherwise encapsulate the metal value, thereby reducing the amount of desired metal values partially or completely encapsulated by such material. The seeding agent may be generated in a number of ways, including the recycling of residue or the introduction of foreign substances. Processes embodying aspects of the present invention may be beneficial for recovering a variety of metals such as copper, gold, silver, nickel, cobalt, molybdenum, zinc, rhenium, uranium, rare earth metals, and platinum group metals from any metal-bearing material, such as ores and concentrates.

L'invention concerne un procédé de récupération de valeurs métalliques à partir de matériaux métallifères. Pendant un processus de réaction, un agent d'ensemencement est introduit pour établir un site de nucléation pour la cristallisation et/ou la croissance d'espèces solides qui passiveraient autrement le processus de réaction ou qui encapsuleraient la valeur métallique. Cela permet de réduire la quantité des valeurs métalliques désirées, partiellement ou totalement encapsulées par ledit matériau. L'agent d'ensemencement peut être créé de plusieurs manières, notamment par le recyclage d'un résidu ou l'introduction de substances étrangères. Les procédés selon l'invention peuvent être avantageux en ce qui concerne la récupération de divers métaux, tels que le cuivre, l'or, l'argent, le nickel, le cobalt, le molybdène, le zinc, le rhénium, l'uranium, les métaux du groupe des terres rares et les métaux du groupe platinique, à partir de n'importe quel matériau métallifère, tel que les minerais et les minerais enrichis.

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