High-temperature tin removal from crude lead using pyrometallurgical methods – could some expert give some guidance?
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High-temperature pyrometallurgical method: salt is used to remove tin. At what temperature should the salt be added? How much should be added? What other considerations are there? Some expert could please give some guidance. If the lead contains high levels of tin, it is necessary to extract the tin
After the crude lead is melted, its temperature rises to around 900 degrees; then caustic soda, sodium nitrate, and sodium chloride are added and mixed. Granules will form on the surface of the lead pot – stirring is required for about 3 hours, after which the slag can be removed. To enhance the recycling of tin metal, a dust collection hood should be installed on the pot surface to connect to the dust collection system.
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