Method for preparing hydrated magnesium carbonate crystal through magnesite hydrothermal one-step leaching

A method for preparing hydrated magnesium carbonate crystals by magnesite hydrothermal one-step leaching belongs to the field of mineral processing technology and mineral material preparation, and specifically comprises the following steps: crushing magnesite ore, carrying out ball milling, washing with water, and drying to obtain magnesite powder; the preparation method comprises the following steps: adding water to prepare slurry, carrying out organic acid hydrothermal leaching and suction filtration treatment to obtain a magnesium ion-rich solution, and carrying out a precipitation reaction on the solution at 30-65 DEG C to prepare a hydrated magnesium carbonate product. According to the method for preparing the hydrated magnesium carbonate crystal through one-step hydrothermal leaching of the magnesite, the magnesite does not need to be subjected to the technological processes of thermal decomposition, hydration, carbonation and the like, the production technological process is simplified, the production