Preparation method of high-purity halloysite

The invention relates to a preparation method of high-purity halloysite, belonging to the field of mineral intensive processing. The preparation method of the high-purity halloysite is characterized by including the following steps: 1) blending raw ore with halloysite content being more than 30% (mass) with water into 5-10% (mass) suspending liquid; 2) according to the adding amount of anhydrous sodium carbonate being 0.1-0.3% of the mass of the suspending liquid, selecting the anhydrous sodium carbonate for later use; adding the anhydrous sodium carbonate to the suspending liquid, then adding sodium hexametaphosphate or sodium polyacrylate with low molecular weight to the suspending liquid, and mechanically agitating for 20-40min to obtain slurry; 3) putting the slurry after agitating into a centrifugal machine for centrifugal separation, with the rotating speed of 1000-1500r/min, and the time of 3-5min; and after centrifugation, removing sediment at a lower layer, taking the suspending liquid at an upper layer, and recentrifuging, with the rotating speed of 2500-3000r/min, and the time of 3-5min; and 4) taking the sediment generated in recentrifuging, and drying at the temperature of 105 DEG C to obtain the high-purity halloysite. The halloysite obtained by using the preparation method has high purity.