• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>32nd Annual Hydrometallurgy Meeting and International Conference on the Practice and Theory of Chloride/Metal Interaction, Vol.1 Oct 19-23, 2002 Montreal, Quebec, Canada >Low Temperature Gaseous Chlorination for Sulphur Oxide Free Extraction of Copper from Chalcopyrite Concentrates
【24h】

Low Temperature Gaseous Chlorination for Sulphur Oxide Free Extraction of Copper from Chalcopyrite Concentrates

机译：低温气相氯化法从黄铜矿精矿中无硫氧化物萃取铜

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Laboratory investigations of gaseous chlorination-selective oxidation process on primary copper sulphide concentrates are described for producing copper chlorides, elemental sulphur and ferric oxide. The copper chlorides can then be leached, purified and electrolysed to produce metallic copper and chlorine regenerated for recycle. When a process, originally proposed for a pyrite concentrate analysing 2.5 wt.% Cu using a two-stage reactor, was applied to a Cu, Ni sulphide concentrate analysing 9 wt.% Cu, the process had to be modified to a three-stage reactor by adding a sulphur chloride conversion unit. In this manner, operational problems associated with the formation of Cu-Fe chloride eutectics and sulphur chlorides could be circumvented. When the process was extended to a 29 wt.% Cu chalcopyrite concentrate, the use of excess oxygen was found to be necessary to stabilise the operation of the oxidation reactor. The flowsheet was further modified to separate the chlorination and selective oxidation units with separate flow paths of fluidising gases, thereby preventing the oxidation of sulphide feed in the chlorination reactor. Leaching of selectively oxidised samples produced solutions analysing Cu concentrations in excess of 100 g/L with Fe/Cu ratios of less than 0.03 and with Cu extractions of over 99%. Leach residues were readily filterable with cake moisture contents of 20 to 25 weight percent.
机译：描述了对初级硫化铜精矿进行气态氯化选择性氧化过程的实验室研究，以生产氯化铜，元素硫和三氧化二铁。然后可以将氯化铜浸出，纯化和电解以生产金属铜，并再生氯以回收利用。当最初提议使用两级反应器分析黄铁矿精矿以分析2.5 wt％的铜的方法应用于铜，分析9 wt％铜的硫化镍精矿时，该方法必须修改为三级反应器中加入氯化硫转化单元。以这种方式，可以避免与形成Cu-Fe氯化物共晶体和氯化硫有关的操作问题。当该方法扩展到29重量％的铜黄铜矿精矿时，发现必须使用过量的氧气来稳定氧化反应器的操作。进一步修改了流程图，以通过流化气体的单独流动路径将氯化单元和选择性氧化单元分开，从而防止了氯化反应器中硫化物进料的氧化。选择性氧化的样品的浸出产生的溶液分析了超过100 g / L的Cu浓度，Fe / Cu比小于0.03，Cu萃取率超过99％。滤饼含水量为20至25重量％时，滤渣易于过滤。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号