November 13, 2025SustainabilityOpen Access

Zinc Kiln Slag Recycling Based on Hydrochloric Acid Oxidative Leaching and Subsequent Metal Recovery

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Analysis shows improved copper and zinc recovery through hydrochloric acid leaching in zinc kiln slag, suggesting sustainable recycling methods.

Recoveries reached 96.3% for copper and 93.6% for zinc, indicating effective metal recovery methods.
Thermodynamic simulations guided optimal leaching conditions at a temperature of 70 °C for zinc kiln slag recycling.
Cementation with iron powder achieved high recovery rates of copper and arsenic, leading to effective metal separation.
The process may enable more sustainable utilization of metallurgical wastes in pyrometallurgical processes.

Grudinsky et al. (2025) studied this question.

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Analysis shows improved copper and zinc recovery through hydrochloric acid leaching in zinc kiln slag, suggesting sustainable recycling methods.