Topic
Miller process
About: Miller process is a research topic. Over the lifetime, 5 publications have been published within this topic receiving 57 citations.
Papers
TL;DR: A number of interesting flowsheets have been developed for the concentration, separation, and purification of platinum group metals (PGMs) over the last few decades as discussed by the authors, which has led to the state-of-the-art in the field of extractive metallurgy.
Abstract: Publisher Summary Beneficiation and recovery of platinum group metals (PGMs) from the major reefs involves a complex set of unit operations that has evolved greatly over the last few decades. Over time, a number of interesting flowsheets have been developed for the concentration, separation, and purification of PGMs. Gold from this source is estimated to be some 5 t/year and is considered to be a by-metal with the six PGMs— namely, platinum, palladium, rhodium, iridium, ruthenium, and osmium. The igneous techniques developed for the recovery of gold from primary and secondary sources mirror the state-of-the-art in the field of extractive metallurgy. In some respects, extraction techniques have in essence not changed for centuries; an example being fire assay practice. On the other hand, more advanced extractive techniques have only recently been developed; an example being selective solvent-extraction. Undoubtedly, economic considerations will continue to drive the ongoing discovery and development of metallurgical techniques and processes to perform cheaper, faster, and hopefully drive the industry toward more sound environmental practices.
12 citations
1 Jan 2016
TL;DR: The industry structure, operations, and business transactions involved in the refining of gold and silver-bearing dore are described in this paper, where pyro-and hydrometallurgical processing approaches to refining dore materials are illustrated and compared with those for non-dore materials.
Abstract: The industry structure, operations, and business transactions involved in the refining of gold- and silver-bearing dore are described. The pyro- and hydrometallurgical processing approaches to refining dore materials are illustrated and compared with those for non-dore materials. In contrast to the refining of industrial precious metals scrap and old jewelry, the refining of dore has unique challenges associated with feedstock variability and the presence of deleterious elements. Recent developments in refining technology are highlighted.
5 citations
1 Jan 2016
TL;DR: In this paper, the extraction and refining of gold from PGM-bearing concentrates and secondary materials is summarized. But gold is typically associated with platinum group metal (PGM) ores and is ultimately recovered in the precious metals refineries.
Abstract: Gold is typically associated with platinum group metal (PGM) ores and is ultimately recovered in the precious metals refineries. This chapter summarizes the extraction and refining of gold from PGM-bearing concentrates and secondary materials. Pyrometallurgical and hydrometallurgical methods are both used in the industry, spanning techniques such as matte smelting, converting, pressure leaching, precipitation, ion exchange, and solvent extraction.
1 citations
1 Jan 1991
TL;DR: In this paper, a borax-silica-bone ash mixture is used to cover the melted gold in order to resist the chemical action of the fluxes used (mixtures of BORAX, niter, and silica at varying proportions).
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.
1 citations
TL;DR: In this article, the Miller Process dross was investigated using non-cyanide leachants and was found to be very refractory to direct leaching with thiourea as well as thiosulphate.
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2016 | 2 |
| 2005 | 1 |
| 1996 | 1 |
| 1991 | 1 |