| Aluminum is an abundant metal
that has many uses. Bauxite, an ore containing aluminum and several other
substances, looks like clay. When refining aluminum, workmen extract the
other substances from the bauxite. To do this they grind the bauxite and
put it into pressurized tanks, the other substances form a mass. After
they take out the mass of other substances and put what is left through
several other processes, they finally come up with a white, powdery chemical
called alumina. This mixture which contains aluminum and oxygen is then
seperated by use of electricity, they are finally left |