Scholarlink

<p>As one of the primary sources for gold recovery, the recovery efficiency of gold from high-sulfur-containing carbon and arsenic refractory gold ore is far from satisfactory. The suspension roasting process can enhance the gold leaching effect. According to thermodynamic analysis, sulfur and arsenic are oxidized into gaseous products, while ankerite and muscovite are decomposed. The experimental results showed that two-step suspension roasting achieved a higher leaching rate than one-step roasting for such ore. Under the condition of two-step suspension roasting, the gold leaching rate reached 84.77%. Suspension roasting increased the distribution rate of gold in bared and semi-bared forms while reducing the arsenic distribution rate in arsenopyrite. Analysis of the calcine’s pore structure indicated that increasing roasting temperature, time, and oxygen concentration promotes pore formation. However, excessively high parameters may lead to sintering and the "secondary wrapping" of arsenic, which blocks pore structures, hinders contact between gold and leaching agents, and ultimately reduces leaching efficiency.</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

Suspension Roasting in Enhancing Gold Leaching Efficiency and Modifying Pore Structure in High-Sulfur, Carbonaceous, Arsenic-Bearing Refractory Gold Ores

  • 期刊论文

  • 发表日期：

    2025年8月21日

查看全文
  • Hua Dong,
  • Jianping Jin,
  • Xinran Zhu,
  • Yanjun Li,
  • Yuexin Han

摘要

As one of the primary sources for gold recovery, the recovery efficiency of gold from high-sulfur-containing carbon and arsenic refractory gold ore is far from satisfactory. The suspension roasting process can enhance the gold leaching effect. According to thermodynamic analysis, sulfur and arsenic are oxidized into gaseous products, while ankerite and muscovite are decomposed. The experimental results showed that two-step suspension roasting achieved a higher leaching rate than one-step roasting for such ore. Under the condition of two-step suspension roasting, the gold leaching rate reached 84.77%. Suspension roasting increased the distribution rate of gold in bared and semi-bared forms while reducing the arsenic distribution rate in arsenopyrite. Analysis of the calcine’s pore structure indicated that increasing roasting temperature, time, and oxygen concentration promotes pore formation. However, excessively high parameters may lead to sintering and the "secondary wrapping" of arsenic, which blocks pore structures, hinders contact between gold and leaching agents, and ultimately reduces leaching efficiency.