| dc.description.abstract | Aluminum is one element in nature that is very much usefulness to humans.
Aluminum bar (ingot) aluminum molding is obtained from liquid (molten). Raw
materials used include alumina (Al2O3), anode, cathode, kliorit (Na3AlF6), soda ash
(Na2CO3) and aluminum fluoride (AlF3). Generated a lot of aluminum bars contain
impurities, such as Fe and Si. Because of iron (Fe) can cause corrosion (rusting),
while the element silicon (Si) causes the aluminum color to yellow. When levels of
iron and silicon in aluminum so there are a lot shall be controlled by way of re-stirring
(stirring again), the addition of molten, partially molten molding (speak out), and a
decrease in grade. Results of observations made it was found that aluminum produced
at PT INALUM still the standard that is applied in PT INALUM, namely for S2 grade
aluminum with purity levels of 99.85%, and grade G1 with 99.70% purity aluminum.
Universitas Sumatera | en_US |
