Which of the following metals cannot be extracted by using Al as a reducing agent?

Identify the process to which the following reaction belongs:

${\mathrm{Al}}_2{\mathrm{O}}_3.2{\mathrm{H}}_2\mathrm{O}+{\mathrm{Na}}_2{\mathrm{CO}}_3\to 2{\mathrm{NaAlO}}_2+2{\mathrm{H}}_2\mathrm{O}+{\mathrm{CO}}_2$

$2{\mathrm{NaAlO}}_2+2{\mathrm{H}}_2\mathrm{O}+{\mathrm{CO}}_2\stackrel{50-60 °\mathrm{C}}{\to }{\mathrm{Al}}_2{\mathrm{O}}_3.2{\mathrm{H}}_2\mathrm{O}+{\mathrm{Na}}_2{\mathrm{CO}}_3$