The Refining Process
Step 1 – Initial melting of Alluvial
After receiving alluvial gold flake and/or nuggets, we melt and thoroughly mix each batch to ensure a reliable result for purchase purposes. This also helps with the removal of a number of impurities. Once we have collected enough bars we will then proceed to the next stage, which is the melting of accumulated bars to begin our refining process.
Step 2 – Melting of collated metal
At this stage all we are trying to do is splatter the gold into a form whereby the surface area of the gold is exposed so we can digest the splatter into a solution efficiently. This enables the next part of the process to happen. You will note we have added silver, this is to help with the digesting at the next stage.
Step 3 – Digestion of the splattered material
At this point we are digesting the splattered gold into a solution, this will take approx 12 hours. Next stage is to separate the gold from the solution.
Step 4 – Precipitation/separation of the gold from the solution
This stage is the separation of the pure gold from its solution. Through this chemical process the gold turns back into a solid and settles at the bottom of the beaker. This is then washed to remove any left over chemicals prior to the melting stage.
Step 5 – Melting of the precipitated /separated gold paste
We are almost at the final stage now which is the melting of the pure gold paste. Once thoroughly melted we will then pour this into water to create granules. These granules are assay tested to ensure its purity. After testing it will then get introduced into our production plant and become anything from bullion for investment to semi finished products used throughout the trade by manufacturing jewellers.
Final Stage – Melted gold paste poured into granules.