METHOD FOR REMOVING THALLIUM FROM PIG-LEAD AND HIGH-PURITY LEAD

摘要

A description is given of a method for removing thalliumfrom pig-lead and high-purity lead by adding metal chloridesand/or chlorine gas, the removal of thallium being carried out inseveral stages at temperatures of between 350 and 400 °C, using aslight overall excess of metal chlorides or chlorine gas inrelation to the thallium content, and the resulting thalliumcontaining molten chloride being removed from the molten metalafter each stage.