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Investigation on the technology of vacuum distillation for gold amalgam

Li Xishan (State-owned Factory No. 503)  
A vacuum distillation method is developed and chosen to distil gold from gold amalgam containing various quantities of mercury. Owing to its low cost and favourable applicability In an all-closed graphite crucible,such gold amalgam is heated directly over 1000°C and is capable of melting to form pure gold.The mercury is recovered near 100% via continuous distillation and cooling to liquid phase.
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