Method for preparing lamellar aragonite calcium carbonate powder from shell under hydrothermal condition

The invention discloses a method for preparing lamellar aragonite calcium carbonate powder from a shell under a hydrothermal condition, and belongs to the field of inorganic material. The method comprises the following process steps: (1) grinding the shell into powder and screening the powder; (2) adding the shell powder into an aqueous solution of polybasic carboxylic acid, and adding the resulting solution into a high pressure kettle to carry out hydrothermal treatment; and (3) separating, washing and drying the treated shell powder to obtain the aragonite calcium carbonate powder with powder particle size being 1-10mu m. According to the method disclosed by the invention, the lamellar aragonite calcium carbonate powder is prepared from the shell by means of hydrothermal treatment, and the method has the characteristics of low raw material cost, simple production process, environment-friendly production process and the like, and is suitable for recycling waste shells on a large scale and with high added val