Through the magnetic separation, acidwashing, sieving, reducing bleaching deferrization, the whiteness of product can be improved, and the reaction mechanism and charging system discussed.

• 本文中采用的是烧成白度为80.；1%25的产品为研究对象，通过磁选、酸洗、过筛、还原漂白除铁等方式提高产品的烧成白度，并对不同的试验研究和反应机理进行探讨。