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首页   >    选矿与冶炼

某含砷银精矿两级焙烧—氰化提银试验研究

  • 郭建东|温海涛
  • 作者单位:
  • 山东国大黄金股份有限公司|山东国大黄金股份有限公司
  • 基金项目:

  • isnull
  • 详细信息:

  • 作者简介:
  • 郭建东(1977—),男,山东招远人,高级工程师,从事浮游选矿、金银冶炼、冶炼烟气制酸及金银提取废渣资源化处理工艺技术研究工作;山东省烟台市招远市国大路668号,山东国大黄金股份有限公司,265406;E-mail:guojiandong08@126.com
  • 通讯作者:
  • isnull
  • PDF下载

Experimental study on the two-stage roasting-cyanidation silver extraction process for an arsenic-containing silver concentrate

  • English Author:
  • Shandong Guoda Gold Co.,Ltd.|Shandong Guoda Gold Co.,Ltd.
  • Unit:
  • 摘要
  • 在线预览
  • 参考文献

摘要:

针对某含砷银精矿采用直接氰化法或焙烧—酸浸—氰化法处理,银浸出率低于70 %,有价金属银难以有效回收的技术难题,进行了两级焙烧—氰化提银工艺研究。结果表明:采用一级氧化焙烧脱砷脱硫脱碳、二级中温氯化焙烧、热水洗涤、氰化浸出提银工艺,银回收效果良好;在一级焙烧温度600 ℃,二级焙烧添加氯化钙50 kg/t、焙烧温度630 ℃、焙烧时间60 min,热水洗涤温度70 ℃~80 ℃、洗涤时间60 min,氰化钠质量浓度2.0~2.5 g/L、氰化浸出时间24 h等条件下,银浸出率达95.89 %。

关键词:

含砷银精矿;焙烧;中温氯化;氰化;热水洗涤;银浸出率

Abstract:

When an arsenic-containing silver concentrate adopts direct cyanidation or roasting-acid leaching-cyanidation process,the silver leaching rate is lower than 70 % and the valuable metal silver can not be effectively recovered.In light of that,the two-stage roasting-cyanidation silver extraction process is studied.The results show that the silver recovery effect is good when the concentrate is roasted to remove arsenic,sulfur and carbon in the first stage,roasted for chlorination with medium temperature in the second stage,washed in hot water,and leached by cyanidation;the silver leaching rate can be up to 95.89 % with the roasting temperature 600 ℃ in the first stage,the calcium chloride addition of 50 kg/t in the second stage,roasting temperature 630 ℃,the roasting time 60 min,the hot water washing temperature 70 ℃-80 ℃,the washing time 60 min,the mass concentration of sodium cyanide 2.0-2.5 g/L,and the cyanide leaching time 24 h.

Keywords:

arsenic-containing silver concentrate;roasting;chlorination with medium temperature;cyanidation;hot water washing;silver leaching rate