Abstract
Refining of gold comprises the following sequence of operations: melting, refining, de-golding, and electrorefining. Melting gold precipitates and/or gold cathodes is required for homogenization, reliable sampling, and pyrorefining. The crucible—which contains the charge—must be able to resist the chemical action of the fluxes used (mixtures of borax, niter, and silica at varying proportions). A borax-silica-bone ash mixture is often used to cover the melt.
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Reference
Embleton, F. T. 1981. A new gold refining facility. Gold Bull. 14 (2): 65–68.
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© 1991 Van Nostrand Reinhold
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Yannopoulos, J.C. (1991). Melting and Refining of Gold. In: The Extractive Metallurgy of Gold. Springer, Boston, MA. https://doi.org/10.1007/978-1-4684-8425-0_11
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DOI: https://doi.org/10.1007/978-1-4684-8425-0_11
Publisher Name: Springer, Boston, MA
Print ISBN: 978-1-4684-8427-4
Online ISBN: 978-1-4684-8425-0
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