The invention discloses a device for preparing heavy
magnesium carbonate from heavy
magnesium water and a preparation method, relating to the field of inorganic salt synthesis. The device comprises aheating
pipe, a
settling tank, a reaction tank, a discharging
auger, a stirring tank, a sampling hole, filtering equipment and
drying equipment, wherein a steam inlet and a heavy
magnesium water inletare formed in one end of the heating
pipe; a first reaction kettle stirrer is arranged in the reaction tank; a sampling pipeline is arranged on the left side of the lower end of the
settling tank; and a
reflux pipeline is arranged on the right side of the lower end of the
settling tank. The preparation method comprises the following steps: heating heavy magnesium water with steam, carrying out adecomposition reaction in the reaction tank, entering the settling tank to settle, discharging large-particle materials by the discharging
auger, pulping, filtering, and
drying, thereby obtaining theheavy magnesium
carbonate. The device disclosed by the invention has the beneficial effects that the device disclosed by the invention is simple and compact in equipment, the equipment is normal pressure equipment, and the pH value of the reaction is neutral; the equipment material requirement is low, and the cost is low; and in the preparation method, in addition to the heavy magnesium water andsteam, other extra materials are not added, and the product quality is easy to control.