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About: Zinc refining     Goto   Sponge   NotDistinct   Permalink

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Type: yago:WikicatMetallurgicalProcessesyago:Abstraction100002137yago:Act100030358yago:Activity100407535yago:Event100029378yago:Procedure101023820yago:PsychologicalFeature100023100yago:YagoPermanentlyLocatedEntityElection New Facet based on Instances of this Class

Zinc refining is the process of purifying zinc to special high grade (SHG) zinc, which is at least 99.995% pure. This process is not usually required when smelting of zinc is done through electrolysis processes, but is needed when zinc is produced by pyrometallurgical processes, because it is only 98.5% pure. There are various refining methods, but the refluxing process is the most commonly used. High purity zinc is required industrially to avoid zinc pest, a slow distortion and cracking of zinc die castings caused by impurities precipitating out.