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Arsenic removal from blister copper by soda injection into melts

机译:通过将苏打水注入熔体中去除粗铜中的砷

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Soda injection into a blister is one of the most important operations in the copper refining processing. The aim of this work is to determine optimal parameters of a technology for arsenic removal from anode copper by use of soda (Na_2CO_3) injected into a molten copper bath by submerged tuyeres. Results of the work reveal that the rate of reaction between soda and arsenic is very high and sodium arsenate Na_3AsO_4 is formed. These findings have been used to work out a table, which gives the amount of soda to be used in the process as a function of refined copper quantity and arsenic content. The second part of this work is to demonstrate the use of nitrogen as a carrier gas for soda injected into the blister for arsenic removal. An application of neutral gases in this process is beneficial, and results in energy conservation.
机译:将纯碱注入水泡是铜精炼工艺中最重要的操作之一。这项工作的目的是确定通过使用由浸入式风口注入熔融铜浴中的苏打(Na_2CO_3)从阳极铜中除砷的技术的最佳参数。工作结果表明,苏打与砷之间的反应速率非常高,并形成了砷酸钠Na_3AsO_4。这些发现已用于制定表格,该表格给出了该过程中要使用的苏打量与精炼铜量和砷含量的函数。这项工作的第二部分是证明使用氮气作为载气,将苏打注入泡罩中以除去砷。在此过程中应用中性气体是有益的,并可以节省能源。

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