goldrefining machines
Gold Refining Machine Mineral Processing Metallurgy. The guard pot, with the clay pot in it containing 2 or 3 ozs of fused borax, is placed in the furnace, and is heated gradually until the bottom of the clay pot is dull red The ingots (of which the larger are slippershaped) to be refined, amounting in all to 650 to 720 ozs in weight, are then placed loosely in the pot, the furnace filled