Multifunctional ore calcination shaft kiln

A multifunctional ore calcination shaft kiln adopts a cylindrical structure with an inner layer and an outer layer; an inner barrel is a fuel accommodating and calcining space; the outer layer is an ore accommodating space; the ore granularity can be reduced to 2-5 cm; fuel can be coal, crop straws, wood chips, coal gas, rock gas or other combustible substances; a screw feeder is arranged in the central position of the top of the inner barrel; an outer barrel surrounds the inner barrel and is an ore accommodating barrel; an ore inlet is formed in the central position of the top of the outer barrel; and the ore inlet doubles as an outlet of waste gas generated during combustion; a product outlet is formed in the bottom of the fuel barrel (i.e. the inner barrel); an ore cooling and calcining part is above the product outlet; an air supply outlet is parallel to a discharge opening. An ore calcining and cooling space covers two thirds of the height of the inner barrel while a fuel accommodating and waste gas disc