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OBORTS Company, Opposite the residence of old General Mambou, Near Dragage, Bastos, Yaoundé, Cameroon
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Jan 18, 2017· Refining gold is simply the process of removing the finer impurities that the smelting process could not remove. There are several methods used to refine gold. The most common gold refining methods include: 1. Miller Process . This is a chlorination process that refines gold to a …
Wohlwill Process Gold Refining Millerpraktijkvanderbij. Gold Refining Methods, Wohlwill process, Miller processes Sep 15, 2011· Before a process can be chosen, the gold meant for refinement has to be evaluated for gold content. Once the amount of gold contained has been established, refining can begin. Inquire Now
Where the material is largely 18 carat or higher, the process becomes somewhat less attractive because of the additional quantitites of copper or silver which need to be added to achieve a starting gold content of 25% for refining, although the process will still operate perfectly satisfactorily. suggests that by optimising the initial grain
Gold Refining. Gold mines process ore using various techniques to produce an alloy composed primarily of gold and silver, which is called a dore bar. The composition of dore can vary significantly between mines, but generally the gold dore bars the Perth Mint processes are composed of between 70-80% gold and 10-15% silver.
The process is complete when purple fumes of gold chloride start to form, usually when the gold content reaches a purity of 99.6 to 99.7 percent. Any PGMs present are not removed, and further refining is necessary if pure gold is required. The typical gold purity achieved by this process is 99.5 percent, with silver as the main impurity.