Drying device with high drying efficiency for calcium carbonate processing

The drying device for calcium carbonate processing is high in drying efficiency and comprises a shell, and a cover is hinged to the left side of the top of the shell. Calcium carbonate is placed on absorbent cotton, then a sealing box door is closed, then a pressing plate is adjusted to move downwards, then an electric heating plate is started to heat water in a water tank, then a water pump is started, hot water in the water tank is conveyed into a coiled pipe and then flows back into the water tank, circulation is conducted in sequence, and the hot water in the coiled pipe can heat a heat conduction pad; then, an operator starts a heating lamp to further heat the environment in the shell, then, an air pump is started, the air pump exhausts air in the shell, then, the air pressure in the shell is reduced, the density of the air in the shell is reduced, and then the gasification speed of water on the surface of calcium carbonate is further increased; and therefore, the drying efficiency of the device is impro