Furnace for producing secondary battery cathode material and method for firing secondary battery cathode material

A furnace for producing a secondary battery cathode material, the furnace comprising:

• a chamber of which the internal space is heated by a heater;
• a conveyer installed in the chamber and conveying a sagger containing raw material power of a cathode material of a secondary battery in one direction;
• and
• a gas supply nozzle and an exhaust port installed in the chamber,
• wherein the chamber includes
• a front chamber including a temperature-increasing section, a rear chamber including a temperature-maintaining section, and an intermediate chamber positioned between the front chamber and the rear chamber and separating the front chamber and the rear chamber, and
• the intermediate chamber has an inlet shutter and an outlet shutter for sealing the internal space thereof, and the exhaust port of the intermediate chamber is connected to an exhaust device for discharging gas, and
• wherein the intermediate chamber includes a gas supply nozzle, and the gas supply nozzle supplies dry air or oxygen into the intermediate chamber after the gas in the intermediate chamber is discharged,
• wherein the inlet shutter and the outlet shutter are controlled not to be simultaneously opened, whereby gas in the front chamber is prevented from diffusing into the rear chamber.