Scholarlink

<p>This study aims to float lead from the lead smelting slag of a Kaldo furnace. The slag characterization showed that the slag consisted of galena, quartz, metallic lead, sphalerite, and pyrrhotite (10.3% Pb, 5.1% Zn, and 20% Fe). Flotation experiments were conducted on the slag using potassium amyl xanthate (PAX), zinc sulfate, and sodium cyanide. Increasing the concentration of PAX improved lead recovery due to the oxidation of the xanthate ion. Due to the particles engaged, zinc sulfate and sodium cyanide were not effective in depressing zinc and iron, and often resulted in the depression of lead. Under optimal conditions of 800&#xa0;g/ton PAX, 250&#xa0;g/ton zinc sulfate, and 50&#xa0;g/ton sodium cyanide at a pH of 9.5, a lead concentrate containing 21.5% lead with a recovery of 61.17% was obtained, alongside zinc and iron recoveries of 45.34% and 26.76%, respectively. Given the 1200&#xa0;°C operating temperature of the Kaldo furnace and the melting points of lead, zinc, and iron, lead and zinc are more susceptible to changes in physical and chemical properties and to form an alloy. This is a significant factor contributing to high zinc recovery in lead concentrate.</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

An innovative process for lead upgrade from Kaldo smelting slag of lead ores: characterization and flotation

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年8月26日

查看全文
  • Hamed Ramezani,
  • Hossein Kamran Haghighi

摘要

This study aims to float lead from the lead smelting slag of a Kaldo furnace. The slag characterization showed that the slag consisted of galena, quartz, metallic lead, sphalerite, and pyrrhotite (10.3% Pb, 5.1% Zn, and 20% Fe). Flotation experiments were conducted on the slag using potassium amyl xanthate (PAX), zinc sulfate, and sodium cyanide. Increasing the concentration of PAX improved lead recovery due to the oxidation of the xanthate ion. Due to the particles engaged, zinc sulfate and sodium cyanide were not effective in depressing zinc and iron, and often resulted in the depression of lead. Under optimal conditions of 800 g/ton PAX, 250 g/ton zinc sulfate, and 50 g/ton sodium cyanide at a pH of 9.5, a lead concentrate containing 21.5% lead with a recovery of 61.17% was obtained, alongside zinc and iron recoveries of 45.34% and 26.76%, respectively. Given the 1200 °C operating temperature of the Kaldo furnace and the melting points of lead, zinc, and iron, lead and zinc are more susceptible to changes in physical and chemical properties and to form an alloy. This is a significant factor contributing to high zinc recovery in lead concentrate.