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In this training module, we'll cover how activated carbon is used to concentrate gold and silver from pregnant leach solution. The concentrating process is based on the concept of adsorption, in which complex gold, silver, and (if present) mercury molecules are adsorbed-or adhered-onto small, millimeter sized particles of activated carbon.
The adsorption process is carried out at atmospheric temperature and pressure. During the process, the metals migrate from a cyanide leach solution to the surfaces of carbon pores. In addition to the animation, this module includes an animated process flowsheet, process variable target ranges and control methods, as well as alarm response procedures.
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