Two-Stage SART Process: A Feasible Alternative for Gold Cyanidation Plants with High Zinc and Copper Contents

Copper and Cyanide Recovery in Cyanidation Effluents

Cyanidation is the main process for gold and silver recovery from its ores. In this study, a process is proposed to recover copper and cyanide from barren solutions from the Merrill-Crowe cementation process with zinc dust. This technology is based on inducing nucleated precipitation of copper and silver in a serpentine reactor, using sodium sulfide as the precipitator, and sulfuric acid for pH...

Monitoring and diagnosing a two-stage production process with attribute characteristics

  Multistage process monitoring has recently attracted notable attention in that the statistical relationships between quality variables are taken into account. Here, we dealt with the problem of monitoring and diagnosing a two-stage production process with attribute characteristics in which the outgoing quality variable is impacted by the incoming quality variable from the first process stage....

Electrooxidation as a Pretreatment Process Before Cyanidation

Residuals based process capability indices for two-stage processes

The manufacturing operations often involve multistage processes where the process capability of each stage is affected by the process capability of its precedent processes. This property is known as the cascade property. The purpose of this paper is to estimate the process capability of the second stage of two-stage process while the cascade property impact is removed using residuals analysis. ...

Zinc , Copper , Lead and Cadmium Contents in Japanese Green Tea

There has been a remarkable increase in the interest shown to trace metal contents in various foodstuffs, since various heavy metals have been shown to be invariably present in environment and in the foodstuffs with the development of analytical methods and techniques. Lead and cadmium have been recognized as important environmental pollutants with toxic effects on human at relatively low level...