Which department examines and approves rare and precious metal smelting projects?

Ministry of metallurgical industry. The rare and precious metal smelting project takes waste silver catalyst as raw material, adopts silver removal+electrolysis+hydrometallurgy to recover silver and precious metals, and supports corresponding auxiliary facilities and waste gas treatment projects, which are approved by the Ministry of Metallurgical Industry. Rare and precious metals are collectively referred to as rare metals and precious metals.