Copper Electrolyte Antimony Bismuth Resin-Removing Antimony Bismuth Impurities from Copper Electrolyte

Arsenic, antimony, and bismuth are common associated elements in copper minerals. Due to their similar potential to copper, they are prone to discharge and precipitate simultaneously with copper at the cathode, and can also form floating anode mud that adheres to the cathode, making them the most harmful impurity elements to the quality of copper.

At present, although there are research on electrolyte purification and impurity removal technologies such as self purification precipitation and solvent extraction, copper smelting enterprises still commonly use the electrodeposition method to co precipitate arsenic, antimony, bismuth, and copper in the form of black copper.

Using ion exchange method with Haipu resin product as adsorbent in "static state", bismuth and antimony in copper electrolyte can be effectively purified under high sulfuric acid acidity of about 200g/l, and the adsorption purification rate can reach over 93%. Temperature has no significant effect on the adsorption purification rate.

The loaded resin that adsorbs bismuth and antimony uses disodium ethylenediaminetetraacetic acid as a resolving agent to separate the bismuth and antimony adsorbed onto the resin. The chelating resin can be recycled for reuse. A simple and effective process can be provided for purifying bismuth and antimony in copper electrolyte.

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