How does a goldsmith refine gold?

Answer 1

How does a goldsmith refine gold?

The two gold refining methods most commonly employed to derive pure gold are: the Miller process and the Wohlwill process. The Miller process uses gaseous chlorine to extract impurities when gold is at melting point; impurities separate into a layer on the surface of the molten purified gold.

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The Wohlwill process increases purity to about 99.99 percent by electrolysis. In this process, a casting of impure gold is lowered into an electrolyte solution of hydrochloric acid and gold chloride. Under the influence of an electric current, the gold migrates to a negatively charged electrode (cathode), where it is restored to a highly pure metallic state, leaving the impurities as a separate solution or residue.

Assaying

This refers to the processes used to determine the composition of a material or item (e.g. jewellery, bar or coin) and measure the proportion of precious metal content.

How Scrap Gold Is RefinedEven though this is the most used process for assessing gold, it can be time-consuming. The process needs to be precise, and there is a lot of room for something to go wrong and for the calculations to be inaccurate.

Because of this, the process can only be relied upon if highly skilled workers carry it out meticulously. Here’s how the fire assay method works.The most commonly used and one of the most accurate methods for refining gold is the fire assay method.

This is an industry-standard procedure that, while reliable, is very involved and requires many steps. The process is worth the time and effort it takes, however, because it has been proven to be 20 times more accurate than any other method.