(1)Gold slime purification smelting processing The gold silver alloy slime will react with the nitric acid in the reactor kiln. Most of the metal such as silver, Iron, Zin, Cu apart from gold will dissolve in nitric acid. The residue is gold slime which will be collected by an corrosion resistant filter after washing. The gold slime from the filter will be sent to the pyrometallurgy smelting oven to be smelted into gold ingot with purity 99% above.

(2)Silver slime purfication smelting process The solution from nitric acid washing will react with hydrochloric acid. The Silver will be collected as Silver chloride residue. Then the Silver chloride willl react with the nitric acid again and the silver will replacement by the Iron powder. The silver slime after purfication will be collected by an corrosion resistant filter after washing. The silver slime from filter will be sent to the smelting oven to casted into silver ingot with purity 99.5% above.

(3)Waste gas processing system The waste gas which generated during the processing will be washed by caustic soda solution before discharged for environment projection purpose.

(4)Gold and Silver casting oven The high purifity gold silver slime after drying will be casted into ingot separately in the pyrometallurgy smelting system container. We do also provide the mould with different pattern base on the customer requirements.