Preparation method of high activity calcined seed crystals

The invention relates to a production process of titanium dioxide by means of a sulfuric acid method and in particular discloses a preparation method of high activity calcined seed crystals. The preparation method comprises the following steps: A, pressurizing for alkali dissolution; B, washing, C, neutralizing, and D, acid solubility. The preparation method provided by the invention has the advantages that 1) a preparation method of grain size-controllable high activity calcined seed crystals is provided; 2) a production method of a high quality titanium dioxide less in sintering, few in lattice imperfection and high in pigment performance is provided; and 3) the preparation method is simple, the production cost is not increased, and the preparation method is favorably popularized industrially. 本发明涉及种硫酸法钛白粉生产工艺，具体公开了种高活性煅烧晶种的制备方法，包括以下步骤：A、加压碱溶；B、水洗；C、中和；D酸溶。本发明的优点是：1)提供了种粒度可控的高活性煅烧晶种的制备方法；2)提供了种烧结少、晶格缺陷少、颜料性能高的优质钛白粉产品的生产方法；3)制备方法简单，不增加生产成本，利于在产业上推广。