单段炼铜工艺流程的发展

Single Stage Copper Making-Flowsheet Developent

1989年CSIRO矿物公司对使用Sirosmelt型反应器将冰铜连续吹炼成低硫粗铜进行了调查,在此工艺的半工业试验取得成功之后,紧接着朝着直接将精矿一步炼成铜金属的方向努力。该项目旨在开发一种连续工艺,其产生的环境和经济效益将优于采用传统的PS转炉炼铜工艺。在优化工艺流程过程中曾对不少炉渣处理方案进行了考虑和试验,其中包括:浸出和电积、浮选-浸出-电积、浮选后回炉对铜进行回收。本文通过目前掌握的资料以及近期CSIRO所做的铜回收试验对这些工艺方案的适用性进行评估。

In 1989 CSIRO Minerals initiated investigations into continuous converting of copper matte into low sulfur blister in Sirosmelt type reactors. Following the succe- ssful piloting of this processing route, some effort was directed towards a single stage copper making process where copper metal is made in one step from concent- rate. The aim of the project in to develop a continuous process, which offers considerable environmental and economic benefits over conventional copper making processes, which use Pierce-smith converters. In the selection of the optimum flowsheet a number of slag treatment options have been considered and tested. These unit operations include: leaching and electrowi- nning, flotation-leaching-electrowinning and flotation with recycling of recovered copper through the smelting vessel. In this paper the suitability of these process options are evaluated using the available information and recently measured copper recoveries from our tes-twork at CSIRO.