The invention relates to a deironing method for
vanadium-bearing stone
coal lixivium. According to the technical scheme, the deironing method comprises the steps that
vanadium-bearing stone
coal is firstly subjected to crushing,
roasting and ore
grinding to obtain
vanadium-bearing stone
coal roasted ore, the vanadium-bearing stone coal roasted ore and water are stirred to obtain vanadium-bearing stone coal ore pulp, then a leaching agent is added, heating and stirring are carried out, and
solid-liquid separation is carried out to obtain the vanadium-bearing stone coal lixivium and leaching residues; reduced
iron powder is added into the vanadium-bearing stone coal lixivium, and the adding amount of the reduced iron power is 2-4 times the stoichiometric number of the
chemical reaction for reducing Fe3+ in the vanadium-bearing stone coal lixivium into Fe2+; heating and stirring are carried out, the pH value is adjusted to range from 1.5 to 5, heating and stirring are carried out,
solid-liquid separation is carried out, and deironed lixivium and a
filter cake are obtained; and the deironed lixivium is used for the vanadium enrichment technology, and a
ferrous oxalate dehydrate byproduct is obtained after the
filter cake is dried.
Vanadium and iron in the vanadium-bearing stone coal lixivium can be effectively separated, the iron in the vanadium-bearing stone coal lixivium can be recycled, the vanadium
loss rate in the deironing process is low, the
iron content of the deironed lixivium is low, and the influence of the iron on the subsequent vanadium enrichment technology is reduced.