Method for comprehensively recovering valuable metals from nickel cobalt sulfate solution containing copper and scandium

The invention belongs to the technical field of metallurgy, and particularly relates to a method for comprehensively recovering valuable metals from a nickel-cobalt sulfate solution containing copper and scandium, which comprises the following steps of: (1) recovering scandium: adding sodium sulfite into the nickel-cobalt sulfate solution containing copper and scandium, controlling the terminal pH to be 3.0-4.0, stirring and reacting at the temperature of 15-40 DEG C, and carrying out solid-liquid separation to obtain scandium slag and a first nickel-cobalt sulfate solution; (2) recovery of copper: heating the first nickel cobalt sulfate solution to 45-95 DEG C, adding a copper removal agent, controlling the end point pH to 3.0-5.0, stirring for reaction, and carrying out solid-liquid separation to obtain copper slag and a second nickel cobalt sulfate solution; and (3) recovery of nickel and cobalt: adding a neutralizer into the second nickel and cobalt sulfate solution, controlling the pH value of the end po