Iron removing and whitening method for indianite

The invention relates to an iron removing and whitening method for indianite. The iron removing and whitening method for the indianite is characterized by comprising the following steps: (1) preparing the following chemical reagents: (1) reducing agents, i.e. sodium bisulfite and zinc powder; and (2) a complexing agent, i.e. any one of oxalic acid, tartaric acid and phosphoric acid; (2) preparing size, i.e. preparing indianite size the concentration of which is between 15 and 20 wt% by adding water into crude ore of the indianite and using sulfuric acid solution the concentration of which is between 1.0 and 3.0mol/L to regulate a pH value to make the pH value is between 2 and 3 to obtain the indianite size the pH value of which is regulated; (3) performing a reduction reaction, i.e. adding the reducing agents into the indianite size the pH value of which is regulated, stirring the mixture to perform a reaction for 25 to 30 minutes and continuously regulating the pH value in the process of the stirring reaction to maintain the pH value between 2 and 3 to obtain the size subjected to the reduction reaction; and (4) adding the complexing agent into the size subjected to the reduction reaction, performing a reaction for 5 minutes, washing the reaction product and drying to obtain the indianite subjected to iron removal and whitening. The iron removing and whitening method is suitable for industrial production and has obvious effect.