Pengaruh Kadar ALF3 dan CaF2 pada Komposisi Bath terhadap Efisiensi Arus

Abstract

In the production of aluminum electrolysis process requires medium is an electrolyte solution bath (cryolite). Bath has a composition such as AlF3 and CaF2 which can affect the acidity of the bath (Sa). AlF3 is an important component in the bath to lower the melting point bath and also as a catalyst. Acidity of the bath on the reduction furnace operation ranged between 8.5% - 11.5%. High acidity of the bath which will cause a decrease in liquid temperature and the ability to dissolve the alumina (Al2O3) is reduced this will reduce the productivity of aluminum which causes the current efficiency decreases. Therefore, the composition of the acidity of the bath should be controlled for optimum current efficiency