| abstract |
The intermediate processing of one metal ion species.With magnesium or/and calcium mineral or oxide compound, oxyhydroxide are raw material through the Magnesium hydrogen carbonate of at least one step preparation in roasting, digestion and the carbonization and other processes Calcium hydrogen carbonate aqueous solution as precipitation agent, with the precipitation by metallic ion in the metal salt solutions such as rare earth, nickel, cobalt, iron, aluminium, gallium, indium, manganese, cadmium, zirconium, hafnium, strontium, barium, copper and zinc, obtain at least a in metal carbonate, oxyhydroxide and the subcarbonate, or further roasting prepares metal oxide. |