| 摘要 |
The invention relates to an integrated hydrometallurgical method for processing metal-containing feedstock, which comprises the following steps: a) dissolving metal-containing feedstock in aqueous hydrochloric acid; b) separating the insoluble constituents; c) introducing dry gaseous HCl; d) filtering off the solid matter; d1) cooling the filtrate from step d) to approximately room temperature; d2) introducing dry gaseous HCl; d3) filtering the solution from step d2); d4) dissolving the solid from step d3) in water and spray-roasting at temperatures of 400 to 900°C; d5) introducing SO3 into the filtrate from step d3); d6) filtering the solution from step d5); d7) heating the filtration residue from d6) to 500-1100°C; d8) adding aqueous hydrochloric acid to the product of d7); d9) filtering off CaSO4; d10) hydrolyzing the FeCl3 obtained in the filtrate from step d9); d11) filtering off Fe2O3 and washing with water; e) heating the solid matter from step d) to 200-300°C; f) cooling the solid mixture to approximately room temperature; optionally g) separating LiCl by washing with ethanol and obtaining LiCl; h) separating NaCl and KCl and, if step g) has not been carried out, LiCl by washing with water and subsequently obtaining NaCl, KCl and LiCl; and j) heating the amorphous Al2O3 and/or the solid matter from step i) to 1200-1400°C and obtaining a-Al2O3. |
