ABSTRACT

A simulation-based life cycle assessment was conducted to compare the impacts of different cyanide-free chloride processing routes for refractory ores to determine whether one-stage leaching of gold from the ores could be advantageous over chloride leaching after conventional pressure oxidation from an environmental perspective. It was shown that both leaching conditions and the refractoriness of the ore strongly affect the environmental impacts of the process. The global warming potential in the direct leaching route was determined to vary between 7.7–17.0 t CO₂-eq for 1 kg gold/Au. Prerequisites for the sustainable application of the direct leaching process are suggested.

摘要

进行了基于模拟的生命周期评估，以比较不同无氰氯化物处理路线对难处理矿石的影响，以确定从环境角度来看，从矿石中一步浸出金是否优于传统加压氧化后的氯化物浸出. 结果表明，浸出条件和矿石的耐火度都强烈影响该过程的环境影响。对于 1 kg 金/Au ，直接浸出路线中的全球变暖潜势在 7.7-17.0 t CO _{2 -eq 之间变化。}提出了直接浸出工艺可持续应用的先决条件。