Stage 1: Gold-bearing soil is thoroughly milled and mixed with various fluxes. This mixture is then poured into a rotary furnace. Lead is then added. After complete melting and the absorption of gold into the lead, the lead is tapped off.

Stage 2: The lead bullion is placed in cupellation furnaces and heated until completely molten. After the molten lead is tapped off, gold-bearing buttons accumulate at the bottom of the furnace. These buttons contain precious metals.

Stage 3: The silver buttons containing gold undergo an acid leaching process. After dissolution in acids and other necessary materials, other metals precipitate. The resulting precipitate is dried, placed in a crucible, and remelted with a flux. Finally, the molten gold is poured into special molds to solidify into bullion.