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Fluorine-contg. gas emission prevention in Al fusion electrolysis - by admixing fluoride with the alumina replenishments
Fluorine-contg. gas emission prevention in Al fusion electrolysis - by admixing fluoride with the alumina replenishments
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机译:含氟量。铝熔融电解中的气体排放预防-通过将氟化物与氧化铝补充剂混合
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摘要
Emission of fluorine, AlF3 and Na tetrafluoraluminate gases usually formed when replenishing the fluoride content of Al salt baths during electrolysis, is eliminated by bringing the fluoride into contact with Al oxide contg. =40% oxide, either directly after the addn. or when adding these substances. Fluoride is pref. cryolite, Al fluoride, and/or Na fluoride and is either mixed together with Al oxide before addn. to the electrolyte or the surface of the intermixture gate is coated with the fluoride and the fluoride immediately with Al oxide.
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