The invention discloses a method for recycling valuable
metal in
vanadium titano-
magnetite through acid high-pressure leaching. The method comprises the steps that firstly, a
vanadium titano-magnetiteconcentrate is mechanically activated; secondly, first acid liquid is provided as a leaching agent, the leaching agent is added into the
vanadium titano-
magnetite concentrate treated in the first step, and first-segment leaching is carried out; thirdly,
solid-solution separation is carried out to obtain first leaching liquid and first leaching
slag; fourthly, second acid liquid is provided as a leaching agent, and is added into first leaching
slag to be subject to second-segment leaching; fifthly,
solid-solution separation is carried out to obtain
tailings and second leaching liquid, and thesecond leaching liquid is subject to certain proportion treatment to be circularly used as the first acid liquid; sixthly, the first leaching liquid is subject to subsequent extraction-separation-step-by-step
crystallization and
sedimentation-
separation process recycling. Two-segment leaching is adopted to sufficiently recycle valuable
metal in ore, the recycling effect is good, the leaching rateis stable, and the recycling rate of valuable
metal elements of vanadium,
titanium and iron can reach 95% or above, and the
resource utilization rate is high.