Method of removing halide from Waelz Oxide

The present disclosure relates to a method for removing halides from Waelz oxide containing the halides. According to the method, halides contained in Waelz oxide, particularly, insoluble fluorides such as CaF_2 difficult to remove under normal pressure conditions and present in an insoluble state,...

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Bibliographische Detailangaben
Hauptverfasser: JOO JAE HOON, CHOI HEON SIK
Format: Patent
Sprache:eng ; kor
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Beschreibung
Zusammenfassung:The present disclosure relates to a method for removing halides from Waelz oxide containing the halides. According to the method, halides contained in Waelz oxide, particularly, insoluble fluorides such as CaF_2 difficult to remove under normal pressure conditions and present in an insoluble state, can be effectively removed, and accordingly, additional processes for adjusting the concentration of fluorine or chlorine present in an electrolyte solution in a recovery process of valuable metals can be reduced and costs can be reduced. The method for removing halides from Waelz oxide comprises a pressurized alkali washing process and a repulping process, and alkali in the pressurized alkali washing process is 100 kg to 300 kg per ton of Waelz oxide cake. 본 개시는 할로겐화물을 포함하는 웰즈 산화물(Waelz Oxide)로부터 할로겐화물을 제거하기 위한 방법에 관한 것이다. 이러한 방법에 따르면, 웰즈 산화물에 포함되는 할로겐화물, 특히 상압 조건에서 제거가 어렵고 불용성으로 존재하는 CaF2와 같은 불용성 불화물을 효과적으로 제거할 수 있고, 이에 따라 유가금속의 회수 공정에서 전해액에 존재하는 불소 또는 염소의 농도 조절을 위한 추가 공정을 줄이고 비용을 감소시킬 수 있다.