Scholarlink

<p>The recovery of gold from refractory sulphide ores remains a major challenge due to the encapsulation of gold within sulphide matrices and the presence of preg-robbing carbonaceous matter. This study investigates and compares two integrated processing routes for the recovery of gold from refractory sulphide ore from the Tri-K deposit (Guinea). Two representative composite samples, KLK and KD, were tested through laboratory-scale gravity separation followed by cyanidation (gravity–CIL route) and flotation followed by oxidative pretreatment and intensive cyanidation (flotation–pretreatment–CIL route). Diagnostic leaching and SEM-EDX analyses revealed that gold occurs mainly as electrum (Au–Ag) finely disseminated within pyrite and arsenopyrite. Gravity concentration-CIL route yielded modest recoveries. Incorporation of flotation followed by oxidative pretreatments improved gold extraction by 11% for KLK and 5% for KD, with oxidation achieving up to 87% sulphur and arsenic removal. The results demonstrate that controlled oxidation coupled with fine grinding significantly enhances gold accessibility and cyanidation kinetics. These findings provide a metallurgical basis for selecting optimal pretreatment strategies for the treatment of refractory sulphide ores of Tri-K deposit.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Comparative Evaluation of Gravity–CIL and Flotation–Pretreatment–CIL Routes for the Recovery of Gold from Refractory Sulphide Ore

  • 期刊论文

  • 发表日期：

    2026年3月6日

查看全文
  • Mohammed Hamchi,
  • Abdelkhalek Barbouchi,
  • Rachid Idouhli,
  • Mohamed Mabsout,
  • Mohamed Ait Bouazza,
  • Abdessalem Abouelfida,
  • Mohy Eddine Khadiri

摘要

The recovery of gold from refractory sulphide ores remains a major challenge due to the encapsulation of gold within sulphide matrices and the presence of preg-robbing carbonaceous matter. This study investigates and compares two integrated processing routes for the recovery of gold from refractory sulphide ore from the Tri-K deposit (Guinea). Two representative composite samples, KLK and KD, were tested through laboratory-scale gravity separation followed by cyanidation (gravity–CIL route) and flotation followed by oxidative pretreatment and intensive cyanidation (flotation–pretreatment–CIL route). Diagnostic leaching and SEM-EDX analyses revealed that gold occurs mainly as electrum (Au–Ag) finely disseminated within pyrite and arsenopyrite. Gravity concentration-CIL route yielded modest recoveries. Incorporation of flotation followed by oxidative pretreatments improved gold extraction by 11% for KLK and 5% for KD, with oxidation achieving up to 87% sulphur and arsenic removal. The results demonstrate that controlled oxidation coupled with fine grinding significantly enhances gold accessibility and cyanidation kinetics. These findings provide a metallurgical basis for selecting optimal pretreatment strategies for the treatment of refractory sulphide ores of Tri-K deposit.