The reference provided describes one method for removing lead from copper alloy waste using calcium wire. Here's a breakdown of the process:
Calcium Wire Method for Removing Lead from Copper Alloy
This method focuses on removing lead from copper alloy waste, not pure copper. It involves the following steps:
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Dissolving Copper Alloy Waste: The copper alloy waste is melted, creating a copper alloy melt. This high-temperature process ensures all components of the alloy are in liquid form.
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Adding Calcium Wire: Calcium wire is introduced into the copper alloy melt. The calcium dissolves within the melt.
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Heating the Lysate: The mixture (lysate) resulting from the calcium dissolution is then heated. This heating process facilitates the separation and removal of lead from the copper. The specific mechanism by which lead is removed after the heating is not explicitly detailed in the provided information, but presumably, the calcium interacts with the lead to form a compound that can then be physically separated (e.g., through skimming).
In summary, this method uses calcium to react with the lead, allowing for its removal from the copper alloy melt.
It's important to note that this is just one potential method and might not be the only or most efficient way to remove lead, and is specifically applicable to copper alloy waste. The specific techniques used and the effectiveness of each method will vary based on factors such as the concentration of lead, the other elements present in the alloy, and the desired purity of the copper.
