Specialized metallurgical processes – compositions for use therei – Processes – Producing or treating free metal
Reexamination Certificate
2007-01-09
2010-12-07
Wyszomierski, George (Department: 1793)
Specialized metallurgical processes, compositions for use therei
Processes
Producing or treating free metal
C423S027000, C423S034000, C423S040000
Reexamination Certificate
active
07846234
ABSTRACT:
The proposed invention relates to methods of precious metal recovery and may be applied to the recovery of precious metals from various types of mineral raw source materials containing chlorides of alkali and earth metals, e.g. collective concentrate produced from clay-salt residue of potassium production, or marker clays, etc. This method includes chlorinating roasting of the collective concentrate produced during enrichment of the material with residual chlorides content of 7-13%, or natural concentrate with up to 15% chlorides content. Thereafter, the cinder is leached by an aqua-regia solution, the precious metals are recovered from the pulp via of sorption, chlorinating roasting is held at 600-700° C., the precious metals are leached from the cinder using diluted solution of aqua-regia, and then via sorption. The process is cost-efficient due to the use of chlorinating agent, reduction of the process steps number, decreasing of the roasting temperature, and the leaching by diluted acid.
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Krasnoshtein ArkadiyEvgenievich
Logvinenko Izabella Alekseevna
Novikov PavelUrievich
Sinegribov Viktor Andreevich
Smetannikov AndreiFilippovich
Aleksandr Smushkovich
McGuthry-Banks Tima M
Wyszomierski George
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