The buyer receives a quantity of gold from the customer, who is no longer willing to keep it because it is old or for any other reason.
Transporting Gold to the Refining Manufacture
The buyer sends the worn-out gold to the gold refining manufacture for testing and examination.
Also read: General Information About Bronze
Taking a Sample
The station takes either a sample of gold or a large amount of it, and mixes it with soda, borax, lead or silver. Soda or borax help reduce the melting point of gold, and this facilitates the refining process.
This mixture of gold and other additives is heated at a temperature of between 1000° C and 12000° C. When the mixture reaches this temperature, it melts. The metals in the gold bars are separated from each other when and the gold goes down to the bottom, then is collected at the bottom.
Separating Gold from Added Silver
To separate gold from silver, the gold is placed in nitric acid or a mixture of hydrochloric and nitric acids.
After separating the gold from the additives, the gold is sent to laboratories to examine and determine its purity.
Also read: Stages of Metal Recycling
This process depends on the product that is intended to be made of gold. Despite this, gold is often poured into bars because it is easy to store and transport them.
اقراء المقالة باللغة اخرى : العربية