METHOD FOR MANUFACTURING SHEET MONODISPERSE NANO-MAGNESIUM HYDROXIDE BY USING MAGNESITE

摘要

A method for manufacturing sheet monodisperse nano-magnesium hydroxide by using magnesite as a material. Specifically, magnesite is calcined to generate magnesian powder having components with different activities; the magnesian powder is made into a solution with a concentration and the solution is stirred, and then the solution is added into an acidification attrition mill to carry out attrition and acidification; the magnesian powder is purified by controlling an amount of the magnesian powder, an amount of hydrochloric acid and an acidification reaction condition; and sheet nano-magnesium hydroxide is prepared by controlling the activity, the particle size and the hydration condition of the magnesia, a hydrated magnesium hydroxide precursor. Hydrochloric acid, water, and an additive can be recycled, which is friendly to the environment and needs low cost. The technology can activate an existing magnesite resource, so as to achieve high value-added processing and utilization of the resource.