The invention provides application of high-molecular-weight cationic
polyacrylamide in a titaniferous solution
sedimentation process in a
sulfuric acid method
titanium dioxide process. The number-average molecular weight of the high-molecular-weight cationic
polyacrylamide is greater than or equal to 10,000,000. The invention further provides a flocculating
settling method for improving the
titanium liquid
settling effect in the
sulfuric acid method
titanium dioxide process. According to the method, cationic
polyacrylamide is applied to the
titanium dioxide titanium liquid
sedimentation procedure through the
sulfuric acid method, the preparation time of a flocculating agent can be shortened by more than half compared with that in the prior art, in the
flocculation process, the concentration of dissociated ions is higher due to the high cationic degree, the
adsorption effect on charges is higher, and the
flocculation efficiency is improved. Particularly, the adsorbent has a relatively strong
adsorption effect on a
silicic acid component contained in the titanium liquid, so that the flocculating
settling process is performed more quickly and thoroughly. By adopting the
emulsion type high-ionic-degree high-molecular-weight cationic polyacrylamide, compared with the traditional flocculant product, the flocculating settling effect of the
sulfate process
titanium dioxide titanium liquid can be effectively improved, and the production cost is comprehensively reduced.