Concentrate-borax and Flame Oven Kit The concentrate is mixed with borax after iron removal then it is smelted in the flame oven to cast bullions. | Amalgamation Retort and Smelting Kit The concentrate is further ground and mixed with mercury after iron removal, and the amalgam is distilled in a closed retort then it is smelted by the propane torch to get the ingot. | Concentrate-borax and Medium Frequency Induction Furnace Kit The concentrate is mixed with borax after iron removal then it is smelted in the medium frequency induction smelting furnace to cast bullions. |