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Enriching Precious Metals from Electric Furnace Materials

     

The precious metal enrichment method for iron-precious metal alloys obtained via electric arc furnace (EAF) smelting enrichment is particularly applicable to iron-precious metal alloys produced from self-produced low-grade precious metal-bearing materials generated during precious metal smelting, when EAF smelting is adopted for precious metal collection.

The pyrometallurgical smelting process using iron as a collector is one of the key processes for recovering platinum group metals (PGMs) from spent automotive exhaust catalysts and other PGM-containing catalysts. It mainly includes two enrichment routes: EAF smelting and plasma furnace smelting, both of which are suitable for treating low-grade precious metal materials.

Low-grade precious metal materials are mainly divided into two categories: the first is secondary resource materials represented by spent automotive exhaust catalysts and petroleum refining catalysts; the second is self-produced low- represented by neutralized wastewater residues, chlorination insoluble residues and other by-products generated in the precious metal smelting process.

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