CN2011073392 METHOD FOR EXTRACTING GALLIUM FROM FLY ASH
We've previously documented the fact that Coal Ash can serve as an exemplary source, an ore, of some needed, even strategic, metals.
And that, in fact, shouldn't be all too surprising when you consider that Coal Ash is, in essence, just a natural mineral that has undergone some extensive preliminary refining and concentration in the boiler furnace of a power plant.