Method for extracting vanadium by directly utilizing artificial agglomerated stone waste residue to calcify molten vanadium slag

The invention relates to the field of solid waste utilization and energy conservation and emission reduction, and provides a method for extracting vanadium by directly using artificial agglomerated stone waste residue to calcify molten vanadium slag, which comprises the following steps: (1) adding a certain amount (5-30%) of artificial agglomerated stone waste residue into molten vanadium slag to carry out calcification reaction, and blowing oxygen into the molten slag in the reaction process (playing roles in oxidizing and stirring); (2) after reacting for 10 minutes, quenching the molten vanadium slag to room temperature; (3) crushing and ball-milling the calcified vanadium slag to-200 meshes; (4) carrying out sulfuric acid leaching on the calcified vanadium slag with the size of-200 meshes to enable vanadium to enter a solution; and (5) carrying out an acidic ammonium salt vanadium precipitation method on the vanadium-containing pickle liquor to obtain ammonium polyvanadate, and calcining in a muffle furna