Copper anodes are made of clayIt is an important raw material for extracting valuable copper alloys such as silver, gold, and platinum group metals. The technical difficulty in anode clay processing does not lie in the gold and silver componentsRegarding the removal of base metal impurities (copper, lead, selenium, tellurium, tin, etc.) contained within, anode mud has two main purposes: first, to enrich the areaCollect gold, silver, and large amounts of base metals in anode mud. If not removed, it will be very difficult to recover gold and silver. Secondly, to share costs, removing base metals consumes a large amount of reagents and equipmentIf these expenses are not fully utilized, the recovered gold and silver will be difficult to achieve economic benefits.

Anode mud recovery has long been carried out using pyrometallurgical processes, and this process is already quite mature. However, the drawbacks of the pyrometallurgical method are obvious, and recently, the hydrometallurgical process has been increasingly used.Various process methods have been developed. Given that the nature and quantity of Datong anode mud are not particularly large, a wet process is being considered as a preliminary consideration. Below, existing domestic and international methods are includedAn introduction to various wet processes. The preliminary plan is that the INER method and the full wet process can be considered as preferred processes. However, due to the lack of a complete analysis of the anode mud, the processThe final selection still requires detailed discussion.      

   Copper anode mud is composed of various substances insoluble in the electrolyte during the electrolytic refining process of the copper anode. Based on its source, there are generally three types of anode mud

(1) Anode mud derived from copper concentrate smelting, generally containing a high amount of Cu, Se, Ag, Pb, Te, and small amounts of Sb, Bi, As, and gangue minerals, including platinum groupLess metal;

(2) Anode mud derived from sulfur-nickel concentrate generally contains more Cu, Ni, S, and Se. Contains less Au, Ag, and platinum group metals;

(3) Anode slime produced from the electrolysis of miscellaneous copper products has a wide range of composition due to diverse sources. Besides Ag and Au, it also contains considerable amounts of Cu, Pb, and Sn.

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