The invention discloses a method for improving filtering performance of
ferrous sulfate. The method comprises the following concrete operations: taking a clear titaniferous solution obtained by a
titanium dioxide production technology employing a
sulfuric acid method, wherein the clear titaniferous solution contains
ferrous sulfate; adding an
accelerant to the clear titaniferous solution and evenly mixing; putting the clear titaniferous solution mixed with the
accelerant into
ice water to crystallize; keeping stirring in the
crystallization process, and crystallizing until the temperature of the clear titaniferous solution is smaller than or equal to 20 DEG C, so as to obtain a crystallized titaniferous solution; taking the
crystal titaniferous solution, and filtering under the condition of negative pressure, so as to obtain a
filter cake of
ferrous sulfate crystal containing the titaniferous solution; and washing when filtering, so as to wash out the titaniferous solution in the
filter cake. By adopting the method, the
accelerant is added to the clear titaniferous solution, a
crystallization center is provided for
crystallization of the ferrous sulfate, and generation of iron
vitriol is facilitated, so that the crystallization speed of the ferrous sulfate is greatly improved, so as to shorten the crystallization time. In addition, the ferrous sulfate
crystal particles are uniform in size, and large in particle size, washing of the
filter cake is facilitated, the content of residue
titanium in the filter cake can be reduced, and the yield of
titanium is improved.