Leaching of pre-oxidated pyrargyrite with Na2S2O5 Conference Paper

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Overview

abstract

• Recently, Mexico has established itself as the largest producer of silver in the world; however, the minerals extracted have a very complex mineralogy. Pyrargyrite presents problems of leaching with cyanide. For this reason, the effect of oxidation with metabisulfite prior to leaching with cyanide is studied. The characterization of the mineral confirmed the presence of a single phase of Ag3 SbS3, identified in the pattern of DRX PDF 00-019-1135. The MEB–EDS analysis shows the elements of pyrargyrite, antimony 22.90, sulfur 17.4, and silver with 59.6%25. From analysis by FTIR, the presence of antimony oxides was found and the formation of sulfates. The leaching of silver with cyanide [0.03]M pre-oxidized with metabisulfite [0.105]M and 96 h, reaches a percentage of silver extraction of 25%25 in 68 h. The increase in the concentration of oxidizing agent at [0.210]M and the leaching time contributes to achieve recoveries of 37%25. © The Minerals, Metals %26 Materials Society 2020.

authors

• Guerrero M.U.F.
• Juárez-Tapia J.C.
• Labra M.P.
• Martínez I.H.
• Martínez V.G.
• Pérez M.R.
• Reyes G.U.
• Reyes I.A.

publication date

• 2020-01-01

funding provided via

• Instituto Politécnico Nacional, IPN  Grant

published in

• Minerals, Metals and Materials Series  Book

Research

keywords

• Cyanide; Leaching; Metabisulfite; Oxidation; Pyrargyrite Cyanides; Leaching; Minerals; Oxidation; Silver; Sulfur compounds; Antimony oxides; EDS analysis; Leaching time; Metabisulfite; Oxidizing agents; Pre-oxidized; Pyrargyrite; Silver extraction; Antimony compounds

Identity

Digital Object Identifier (DOI)

• 10.1007/978-3-030-36628-5_64

Additional Document Info

start page

• 651

end page

• 659

volume

• PartF1