The invention discloses a method for preparing
sodium antimonate from an
antimony oxide ore via an alkaline approach. The method comprises the following steps: (1) leaching the
antimony oxide ore, (2) purifying filtrate, and (3) oxidizing the purified filtrate. The method is high in
recovery rate, the
leaching rate of
antimony is 95-99%, the direct
recovery rate of
sodium antimonate is 90-95%, the whole process is performed under an alkaline environment, the requirement on
corrosion resistance of equipment is not high, no complicated pretreatment is required in the process, the needed raw materials are nontoxic and harmless, the alkaline liquid is recyclable, neither waste water nor
waste gas is generated in the process, and waste residues are nontoxic and harmless.