Ceramsite roasting and firing system

The invention discloses a ceramsite roasting and firing system which comprises a ceramsite roasting kiln and a grate cooler for cooling ceramsite, wherein the ceramsite calcining kiln is a rotary ceramsite calcining kiln, and a feed port and a discharge port of the rotary ceramsite calcining kiln are mounted at the feed end of the grate cooler at a gradient of 2.5%; a temperature measuring device which horizontally moves along the kiln body is arranged on the outer wall of the kiln body; the discharging end of the rotary ceramsite roasting kiln is connected with a sealing door cover, and the lower end face of the door cover is connected with a feeding port of a grate cooler in a sealing mode. The rotary ceramsite calcining kiln is used for producing ceramsite, so that gas-forming substances in the ceramsite are released in order, and the ceramsite with different pore structures is obtained; the liquid phase quantity of the surface of the ceramsite is increased, the porcelainization degree of the surface of th