Pengaruh Kadar Zat Pengotor Silikon (Si) dan Besi (Fe) pada Aluminium Cair yang Dihasilkan di Tungku Reduksi terhadap Kesesuaian Standar Grade Aluminium di PT Inalum

Abstract

Levels have been performed testing the effect of silica and iron impurities contained in molten aluminum to produce standard of grade aluminum. Generated a lot of aluminum contain impurities, such as iron and silicon can cause corrosion (rusting) and the aluminum colour to yellow. When influences levels in aluminum are a lot shall be controlled by way of re-stirring, the addition of molten, partially molten molding and a decrease in grade. Results of observations made, aluminum produced at PT INALUM still the standard of grade is applied, for S2 grade with higher levels of impurities Si = 0,08 and Fe = 0,12 with purity of 99,85% and G1 grade with higher levels of impurities Si = 0,15 and Fe = 0,20 with purity of 99,70%.