The invention discloses a method for washing pseudo-
boehmite. The method comprises the following steps of primary washing, wherein after aged pseudo-
boehmite slurry is filtered, filter residues are discharged into a primary
water washing tank, and the filter residues and secondary filtrate sent by a secondary washing
liquid storage tank are mixed and washed; secondary washing, wherein filtering iscarried out again, the primary filtrate flows into a primary washing
liquid storage tank, the primary filter residues are discharged into a secondary
water washing tank, and the primary filter residues and fourth-time filtrate sent by a fourth-time washing
liquid storage tank are mixed and washed;
tertiary washing, wherein filtering is carried out again, the secondary filtrate flows into the secondary
water washing tank and then is pumped into the primary water washing tank, the secondary filter residues are discharged into a
tertiary water washing tank, and the secondary filter residues andhot water in a hot water tank are mixed and washed; fourth-time washing, wherein filtering is carried out again, the
tertiary filtrate flows into the tertiary water washing tank, tertiary filter residues are discharged into a fourth-time water washing tank, and the tertiary filter residues and the hot water of the hot water tank are mixed and washed; filtering-out, wherein filtering is carried outagain, the fourth-time filtrate flows into the fourth-time washing
liquid storage tank and is pumped into the secondary water washing tank, and the fourth-time filter residues are qualified filter residues. The washing frequency is increased, the washing efficiency is improved, but the
water consumption is greatly reduced.