Anode slime generated during the antimony electrolysis process is rich in valuable metals such as Ag, Au, Cu, Bi, Se, and Te; the schemes for its treatment and metal recovery typically involve the following stages:

Anode slime collection: Slime hoppers or conical bottoms are installed at the base of the antimony electrolysis cells for periodic discharge; alternatively, continuous scraper conveyors may be used to transport the slime to collection tanks.

Washing and filtration: Vacuum filters or filter presses are used to remove the electrolyte, with the filtrate returned to the antimony electrolysis system.

Pyrometallurgical or hydrometallurgical recovery:

Pyrometallurgical method: The anode slime undergoes roasting, smelting, and converting to recover silver, gold, and other metals.

Hydrometallurgical method: Acid leaching, ammonia leaching, cyanidation, or thiourea leaching is employed, combined with electrowinning or displacement, to recover precious metals.

Equipment corrosion protection: As anode slime treatment often involves strong acids and strong oxidizing agents, equipment must be constructed using materials such as titanium, rubber lining, plastic lining, or fiberglass-reinforced plastic (FRP).

In summary, the treatment of antimony electrolysis anode slime requires a combination of pyrometallurgical and hydrometallurgical processes, along with a focus on corrosion-resistant materials for equipment, to achieve the efficient recovery of valuable metals.